mirror of https://github.com/grpc/grpc.git
Conflicts: src/core/security/credentials.cpull/168/head
Nicolas Noble
10 years ago
commit
fee065c1c7
257 changed files with 14263 additions and 1362 deletions
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[gRPC - An RPC library and framework](http://github.com/google/grpc) |
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=================================== |
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|
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Copyright 2015 Google Inc. |
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|
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#Installation |
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|
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See grpc/INSTALL for installation instructions for various platforms. |
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|
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#Overview |
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|
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|
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Remote Procedure Calls (RPCs) provide a useful abstraction for building |
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distributed applications and services. The libraries in this repository |
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provide a concrete implementation of the gRPC protocol, layered over HTTP/2. |
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These libraries enable communication between clients and servers using any |
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combination of the supported languages. |
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|
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|
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##Interface |
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|
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|
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Developers using gRPC typically start with the description of an RPC service |
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(a collection of methods), and generate client and server side interfaces |
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which they use on the client-side and implement on the server side. |
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|
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By default, gRPC uses [Protocol Buffers](github.com/google/protobuf) as the |
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Interface Definition Language (IDL) for describing both the service interface |
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and the structure of the payload messages. It is possible to use other |
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alternatives if desired. |
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|
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###Surface API |
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Starting from an interface definition in a .proto file, gRPC provides |
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Protocol Compiler plugins that generate Client- and Server-side APIs. |
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gRPC users typically call into these APIs on the Client side and implement |
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the corresponding API on the server side. |
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|
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#### Synchronous vs. asynchronous |
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Synchronous RPC calls, that block until a response arrives from the server, are |
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the closest approximation to the abstraction of a procedure call that RPC |
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aspires to. |
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|
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On the other hand, networks are inherently asynchronous and in many scenarios, |
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it is desirable to have the ability to start RPCs without blocking the current |
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thread. |
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|
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The gRPC programming surface in most languages comes in both synchronous and |
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asynchronous flavors. |
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|
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|
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## Streaming |
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|
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gRPC supports streaming semantics, where either the client or the server (or both) |
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send a stream of messages on a single RPC call. The most general case is |
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Bidirectional Streaming where a single gRPC call establishes a stream where both |
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the client and the server can send a stream of messages to each other. The streamed |
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messages are delivered in the order they were sent. |
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|
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|
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#Protocol |
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|
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The gRPC protocol specifies the abstract requirements for communication between |
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clients and servers. A concrete embedding over HTTP/2 completes the picture by |
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fleshing out the details of each of the required operations. |
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|
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## Abstract gRPC protocol |
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A gRPC RPC comprises of a bidirectional stream of messages, initiated by the client. In the client-to-server direction, this stream begins with a mandatory `Call Header`, followed by optional `Initial-Metadata`, followed by zero or more `Payload Messages`. The server-to-client direction contains an optional `Initial-Metadata`, followed by zero or more `Payload Messages` terminated with a mandatory `Status` and optional `Status-Metadata` (a.k.a.,`Trailing-Metadata`). |
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|
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## Implementation over HTTP/2 |
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The abstract protocol defined above is implemented over [HTTP/2](https://http2.github.io/). gRPC bidirectional streams are mapped to HTTP/2 streams. The contents of `Call Header` and `Initial Metadata` are sent as HTTP/2 headers and subject to HPAC compression. `Payload Messages` are serialized into a byte stream of length prefixed gRPC frames which are then fragmented into HTTP/2 frames at the sender and reassembled at the receiver. `Status` and `Trailing-Metadata` are sent as HTTP/2 trailing headers (a.k.a., trailers). |
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|
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## Flow Control |
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gRPC inherits the flow control mchanims in HTTP/2 and uses them to enable fine-grained control of the amount of memory used for buffering in-flight messages. |
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@ -0,0 +1,60 @@ |
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/*
|
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* |
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* Copyright 2014, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
||||
* modification, are permitted provided that the following conditions are |
||||
* met: |
||||
* |
||||
* * Redistributions of source code must retain the above copyright |
||||
* notice, this list of conditions and the following disclaimer. |
||||
* * Redistributions in binary form must reproduce the above |
||||
* copyright notice, this list of conditions and the following disclaimer |
||||
* in the documentation and/or other materials provided with the |
||||
* distribution. |
||||
* * Neither the name of Google Inc. nor the names of its |
||||
* contributors may be used to endorse or promote products derived from |
||||
* this software without specific prior written permission. |
||||
* |
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
||||
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
||||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||||
* |
||||
*/ |
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|
||||
#include <grpc++/client_context.h> |
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|
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#include "examples/tips/client.h" |
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|
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using tech::pubsub::Topic; |
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using tech::pubsub::PublisherService; |
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|
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namespace grpc { |
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namespace examples { |
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namespace tips { |
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|
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Client::Client(std::shared_ptr<ChannelInterface> channel) |
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: stub_(PublisherService::NewStub(channel)) { |
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} |
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|
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Status Client::CreateTopic(grpc::string topic) { |
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Topic request; |
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Topic response; |
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request.set_name(topic); |
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ClientContext context; |
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|
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return stub_->CreateTopic(&context, request, &response); |
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} |
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|
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} // namespace tips
|
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} // namespace examples
|
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} // namespace grpc
|
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@ -0,0 +1,59 @@ |
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/*
|
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* |
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* Copyright 2014, Google Inc. |
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* All rights reserved. |
||||
* |
||||
* Redistribution and use in source and binary forms, with or without |
||||
* modification, are permitted provided that the following conditions are |
||||
* met: |
||||
* |
||||
* * Redistributions of source code must retain the above copyright |
||||
* notice, this list of conditions and the following disclaimer. |
||||
* * Redistributions in binary form must reproduce the above |
||||
* copyright notice, this list of conditions and the following disclaimer |
||||
* in the documentation and/or other materials provided with the |
||||
* distribution. |
||||
* * Neither the name of Google Inc. nor the names of its |
||||
* contributors may be used to endorse or promote products derived from |
||||
* this software without specific prior written permission. |
||||
* |
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
||||
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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|
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#ifndef __GRPCPP_EXAMPLES_TIPS_CLIENT_H_ |
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#define __GRPCPP_EXAMPLES_TIPS_CLIENT_H_ |
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|
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#include <grpc++/channel_interface.h> |
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#include <grpc++/status.h> |
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|
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#include "examples/tips/pubsub.pb.h" |
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|
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namespace grpc { |
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namespace examples { |
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namespace tips { |
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|
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class Client { |
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public: |
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Client(std::shared_ptr<grpc::ChannelInterface> channel); |
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Status CreateTopic(grpc::string topic); |
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|
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private: |
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std::unique_ptr<tech::pubsub::PublisherService::Stub> stub_; |
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}; |
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|
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} // namespace tips
|
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} // namespace examples
|
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} // namespace grpc
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|
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#endif // __GRPCPP_EXAMPLES_TIPS_CLIENT_H_
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@ -0,0 +1,72 @@ |
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/*
|
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* |
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* Copyright 2014, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
||||
* modification, are permitted provided that the following conditions are |
||||
* met: |
||||
* |
||||
* * Redistributions of source code must retain the above copyright |
||||
* notice, this list of conditions and the following disclaimer. |
||||
* * Redistributions in binary form must reproduce the above |
||||
* copyright notice, this list of conditions and the following disclaimer |
||||
* in the documentation and/or other materials provided with the |
||||
* distribution. |
||||
* * Neither the name of Google Inc. nor the names of its |
||||
* contributors may be used to endorse or promote products derived from |
||||
* this software without specific prior written permission. |
||||
* |
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
||||
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
||||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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|
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#include <grpc/grpc.h> |
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#include <grpc/support/log.h> |
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#include <google/gflags.h> |
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#include <grpc++/channel_interface.h> |
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#include <grpc++/create_channel.h> |
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#include <grpc++/status.h> |
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|
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#include "examples/tips/client.h" |
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#include "test/cpp/util/create_test_channel.h" |
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|
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DEFINE_int32(server_port, 443, "Server port."); |
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DEFINE_string(server_host, |
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"pubsub-staging.googleapis.com", "Server host to connect to"); |
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|
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int main(int argc, char** argv) { |
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grpc_init(); |
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google::ParseCommandLineFlags(&argc, &argv, true); |
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gpr_log(GPR_INFO, "Start TIPS client"); |
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|
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const int host_port_buf_size = 1024; |
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char host_port[host_port_buf_size]; |
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snprintf(host_port, host_port_buf_size, "%s:%d", FLAGS_server_host.c_str(), |
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FLAGS_server_port); |
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|
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std::shared_ptr<grpc::ChannelInterface> channel( |
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grpc::CreateTestChannel(host_port, |
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FLAGS_server_host, |
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true, // enable SSL
|
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true)); // use prod roots
|
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|
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grpc::examples::tips::Client client(channel); |
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grpc::Status s = client.CreateTopic("test"); |
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gpr_log(GPR_INFO, "return code %d", s.code()); |
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GPR_ASSERT(s.IsOk()); |
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|
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channel.reset(); |
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grpc_shutdown(); |
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return 0; |
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} |
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@ -0,0 +1,106 @@ |
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/*
|
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* |
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* Copyright 2014, Google Inc. |
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* All rights reserved. |
||||
* |
||||
* Redistribution and use in source and binary forms, with or without |
||||
* modification, are permitted provided that the following conditions are |
||||
* met: |
||||
* |
||||
* * Redistributions of source code must retain the above copyright |
||||
* notice, this list of conditions and the following disclaimer. |
||||
* * Redistributions in binary form must reproduce the above |
||||
* copyright notice, this list of conditions and the following disclaimer |
||||
* in the documentation and/or other materials provided with the |
||||
* distribution. |
||||
* * Neither the name of Google Inc. nor the names of its |
||||
* contributors may be used to endorse or promote products derived from |
||||
* this software without specific prior written permission. |
||||
* |
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
||||
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
||||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||||
* |
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*/ |
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|
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#include <grpc++/channel_arguments.h> |
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#include <grpc++/channel_interface.h> |
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#include <grpc++/client_context.h> |
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#include <grpc++/create_channel.h> |
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#include <grpc++/server.h> |
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#include <grpc++/server_builder.h> |
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#include <grpc++/server_context.h> |
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#include <grpc++/status.h> |
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#include <gtest/gtest.h> |
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|
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#include "examples/tips/client.h" |
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#include "test/core/util/port.h" |
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#include "test/core/util/test_config.h" |
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|
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using grpc::ChannelInterface; |
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|
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namespace grpc { |
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namespace testing { |
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namespace { |
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|
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const char kTopic[] = "test topic"; |
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|
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class PublishServiceImpl : public tech::pubsub::PublisherService::Service { |
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public: |
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Status CreateTopic(::grpc::ServerContext* context, |
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const ::tech::pubsub::Topic* request, |
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::tech::pubsub::Topic* response) override { |
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EXPECT_EQ(request->name(), kTopic); |
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return Status::OK; |
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} |
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}; |
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|
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class End2endTest : public ::testing::Test { |
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protected: |
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void SetUp() override { |
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int port = grpc_pick_unused_port_or_die(); |
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server_address_ << "localhost:" << port; |
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// Setup server
|
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ServerBuilder builder; |
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builder.AddPort(server_address_.str()); |
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builder.RegisterService(service_.service()); |
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server_ = builder.BuildAndStart(); |
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|
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channel_ = CreateChannel(server_address_.str(), ChannelArguments()); |
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} |
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|
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void TearDown() override { server_->Shutdown(); } |
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|
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std::unique_ptr<Server> server_; |
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std::ostringstream server_address_; |
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PublishServiceImpl service_; |
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|
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std::shared_ptr<ChannelInterface> channel_; |
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}; |
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|
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TEST_F(End2endTest, CreateTopic) { |
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grpc::examples::tips::Client client(channel_); |
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client.CreateTopic(kTopic); |
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} |
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|
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} // namespace
|
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} // namespace testing
|
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} // namespace grpc
|
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|
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int main(int argc, char** argv) { |
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grpc_test_init(argc, argv); |
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grpc_init(); |
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::testing::InitGoogleTest(&argc, argv); |
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gpr_log(GPR_INFO, "Start test ..."); |
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int result = RUN_ALL_TESTS(); |
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grpc_shutdown(); |
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return result; |
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} |
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@ -0,0 +1,13 @@ |
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syntax = "proto2"; |
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|
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package proto2; |
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|
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// An empty message that you can re-use to avoid defining duplicated empty |
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// messages in your project. A typical example is to use it as argument or the |
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// return value of a service API. For instance: |
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// |
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// service Foo { |
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// rpc Bar (proto2.Empty) returns (proto2.Empty) { }; |
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// }; |
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// |
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message Empty {} |
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@ -0,0 +1,48 @@ |
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// Labels provide a way to associate user-defined metadata with various |
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// objects. Labels may be used to organize objects into non-hierarchical |
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// groups; think metadata tags attached to mp3s. |
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|
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syntax = "proto2"; |
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|
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package tech.label; |
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|
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// A key-value pair applied to a given object. |
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message Label { |
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// The key of a label is a syntactically valid URL (as per RFC 1738) with |
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// the "scheme" and initial slashes omitted and with the additional |
||||
// restrictions noted below. Each key should be globally unique. The |
||||
// "host" portion is called the "namespace" and is not necessarily |
||||
// resolvable to a network endpoint. Instead, the namespace indicates what |
||||
// system or entity defines the semantics of the label. Namespaces do not |
||||
// restrict the set of objects to which a label may be associated. |
||||
// |
||||
// Keys are defined by the following grammar: |
||||
// |
||||
// key = hostname "/" kpath |
||||
// kpath = ksegment *[ "/" ksegment ] |
||||
// ksegment = alphadigit | *[ alphadigit | "-" | "_" | "." ] |
||||
// |
||||
// where "hostname" and "alphadigit" are defined as in RFC 1738. |
||||
// |
||||
// Example key: |
||||
// spanner.google.com/universe |
||||
required string key = 1; |
||||
|
||||
// The value of the label. |
||||
oneof value { |
||||
// A string value. |
||||
string str_value = 2; |
||||
// An integer value. |
||||
int64 num_value = 3; |
||||
} |
||||
} |
||||
|
||||
// A collection of labels, such as the set of all labels attached to an |
||||
// object. Each label in the set must have a different key. |
||||
// |
||||
// Users should prefer to embed "repeated Label" directly when possible. |
||||
// This message should only be used in cases where that isn't possible (e.g. |
||||
// with oneof). |
||||
message Labels { |
||||
repeated Label label = 1; |
||||
} |
||||
@ -0,0 +1,702 @@ |
||||
// Specification of the Pubsub API. |
||||
|
||||
syntax = "proto2"; |
||||
|
||||
import "examples/tips/empty.proto"; |
||||
import "examples/tips/label.proto"; |
||||
|
||||
package tech.pubsub; |
||||
|
||||
// ----------------------------------------------------------------------------- |
||||
// Overview of the Pubsub API |
||||
// ----------------------------------------------------------------------------- |
||||
|
||||
// This file describes an API for a Pubsub system. This system provides a |
||||
// reliable many-to-many communication mechanism between independently written |
||||
// publishers and subscribers where the publisher publishes messages to "topics" |
||||
// and each subscriber creates a "subscription" and consumes messages from it. |
||||
// |
||||
// (a) The pubsub system maintains bindings between topics and subscriptions. |
||||
// (b) A publisher publishes messages into a topic. |
||||
// (c) The pubsub system delivers messages from topics into relevant |
||||
// subscriptions. |
||||
// (d) A subscriber receives pending messages from its subscription and |
||||
// acknowledges or nacks each one to the pubsub system. |
||||
// (e) The pubsub system removes acknowledged messages from that subscription. |
||||
|
||||
// ----------------------------------------------------------------------------- |
||||
// Data Model |
||||
// ----------------------------------------------------------------------------- |
||||
|
||||
// The data model consists of the following: |
||||
// |
||||
// * Topic: A topic is a resource to which messages are published by publishers. |
||||
// Topics are named, and the name of the topic is unique within the pubsub |
||||
// system. |
||||
// |
||||
// * Subscription: A subscription records the subscriber's interest in a topic. |
||||
// It can optionally include a query to select a subset of interesting |
||||
// messages. The pubsub system maintains a logical cursor tracking the |
||||
// matching messages which still need to be delivered and acked so that |
||||
// they can retried as needed. The set of messages that have not been |
||||
// acknowledged is called the subscription backlog. |
||||
// |
||||
// * Message: A message is a unit of data that flows in the system. It contains |
||||
// opaque data from the publisher along with its labels. |
||||
// |
||||
// * Message Labels (optional): A set of opaque key, value pairs assigned |
||||
// by the publisher which the subscriber can use for filtering out messages |
||||
// in the topic. For example, a label with key "foo.com/device_type" and |
||||
// value "mobile" may be added for messages that are only relevant for a |
||||
// mobile subscriber; a subscriber on a phone may decide to create a |
||||
// subscription only for messages that have this label. |
||||
|
||||
// ----------------------------------------------------------------------------- |
||||
// Publisher Flow |
||||
// ----------------------------------------------------------------------------- |
||||
|
||||
// A publisher publishes messages to the topic using the Publish request: |
||||
// |
||||
// PubsubMessage message; |
||||
// message.set_data("...."); |
||||
// Label label; |
||||
// label.set_key("foo.com/key1"); |
||||
// label.set_str_value("value1"); |
||||
// message.add_label(label); |
||||
// PublishRequest request; |
||||
// request.set_topic("topicName"); |
||||
// request.set_message(message); |
||||
// PublisherService.Publish(request); |
||||
|
||||
// ----------------------------------------------------------------------------- |
||||
// Subscriber Flow |
||||
// ----------------------------------------------------------------------------- |
||||
|
||||
// The subscriber part of the API is richer than the publisher part and has a |
||||
// number of concepts w.r.t. subscription creation and monitoring: |
||||
// |
||||
// (1) A subscriber creates a subscription using the CreateSubscription call. |
||||
// It may specify an optional "query" to indicate that it wants to receive |
||||
// only messages with a certain set of labels using the label query syntax. |
||||
// It may also specify an optional truncation policy to indicate when old |
||||
// messages from the subcription can be removed. |
||||
// |
||||
// (2) A subscriber receives messages in one of two ways: via push or pull. |
||||
// |
||||
// (a) To receive messages via push, the PushConfig field must be specified in |
||||
// the Subscription parameter when creating a subscription. The PushConfig |
||||
// specifies an endpoint at which the subscriber must expose the |
||||
// PushEndpointService. Messages are received via the HandlePubsubEvent |
||||
// method. The push subscriber responds to the HandlePubsubEvent method |
||||
// with a result code that indicates one of three things: Ack (the message |
||||
// has been successfully processed and the Pubsub system may delete it), |
||||
// Nack (the message has been rejected, the Pubsub system should resend it |
||||
// at a later time), or Push-Back (this is a Nack with the additional |
||||
// semantics that the subscriber is overloaded and the pubsub system should |
||||
// back off on the rate at which it is invoking HandlePubsubEvent). The |
||||
// endpoint may be a load balancer for better scalability. |
||||
// |
||||
// (b) To receive messages via pull a subscriber calls the Pull method on the |
||||
// SubscriberService to get messages from the subscription. For each |
||||
// individual message, the subscriber may use the ack_id received in the |
||||
// PullResponse to Ack the message, Nack the message, or modify the ack |
||||
// deadline with ModifyAckDeadline. See the |
||||
// Subscription.ack_deadline_seconds field documentation for details on the |
||||
// ack deadline behavior. |
||||
// |
||||
// Note: Messages may be consumed in parallel by multiple subscribers making |
||||
// Pull calls to the same subscription; this will result in the set of |
||||
// messages from the subscription being shared and each subscriber |
||||
// receiving a subset of the messages. |
||||
// |
||||
// (4) The subscriber can explicitly truncate the current subscription. |
||||
// |
||||
// (5) "Truncated" events are delivered when a subscription is |
||||
// truncated, whether due to the subscription's truncation policy |
||||
// or an explicit request from the subscriber. |
||||
// |
||||
// Subscription creation: |
||||
// |
||||
// Subscription subscription; |
||||
// subscription.set_topic("topicName"); |
||||
// subscription.set_name("subscriptionName"); |
||||
// subscription.push_config().set_push_endpoint("machinename:8888"); |
||||
// SubscriberService.CreateSubscription(subscription); |
||||
// |
||||
// Consuming messages via push: |
||||
// |
||||
// TODO(eschapira): Add HTTP push example. |
||||
// |
||||
// The port 'machinename:8888' must be bound to a stubby server that implements |
||||
// the PushEndpointService with the following method: |
||||
// |
||||
// int HandlePubsubEvent(PubsubEvent event) { |
||||
// if (event.subscription().equals("subscriptionName")) { |
||||
// if (event.has_message()) { |
||||
// Process(event.message().data()); |
||||
// } else if (event.truncated()) { |
||||
// ProcessTruncatedEvent(); |
||||
// } |
||||
// } |
||||
// return OK; // This return code implies an acknowledgment |
||||
// } |
||||
// |
||||
// Consuming messages via pull: |
||||
// |
||||
// The subscription must be created without setting the push_config field. |
||||
// |
||||
// PullRequest pull_request; |
||||
// pull_request.set_subscription("subscriptionName"); |
||||
// pull_request.set_return_immediately(false); |
||||
// while (true) { |
||||
// PullResponse pull_response; |
||||
// if (SubscriberService.Pull(pull_request, pull_response) == OK) { |
||||
// PubsubEvent event = pull_response.pubsub_event(); |
||||
// if (event.has_message()) { |
||||
// Process(event.message().data()); |
||||
// } else if (event.truncated()) { |
||||
// ProcessTruncatedEvent(); |
||||
// } |
||||
// AcknowledgeRequest ack_request; |
||||
// ackRequest.set_subscription("subscriptionName"); |
||||
// ackRequest.set_ack_id(pull_response.ack_id()); |
||||
// SubscriberService.Acknowledge(ack_request); |
||||
// } |
||||
// } |
||||
|
||||
// ----------------------------------------------------------------------------- |
||||
// Reliability Semantics |
||||
// ----------------------------------------------------------------------------- |
||||
|
||||
// When a subscriber successfully creates a subscription using |
||||
// Subscriber.CreateSubscription, it establishes a "subscription point" with |
||||
// respect to that subscription - the subscriber is guaranteed to receive any |
||||
// message published after this subscription point that matches the |
||||
// subscription's query. Note that messages published before the Subscription |
||||
// point may or may not be delivered. |
||||
// |
||||
// If the system truncates the subscription according to the specified |
||||
// truncation policy, the system delivers a subscription status event with the |
||||
// "truncated" field set to true. We refer to such events as "truncation |
||||
// events". A truncation event: |
||||
// |
||||
// * Informs the subscriber that part of the subscription messages have been |
||||
// discarded. The subscriber may want to recover from the message loss, e.g., |
||||
// by resyncing its state with its backend. |
||||
// * Establishes a new subscription point, i.e., the subscriber is guaranteed to |
||||
// receive all changes published after the trunction event is received (or |
||||
// until another truncation event is received). |
||||
// |
||||
// Note that messages are not delivered in any particular order by the pubsub |
||||
// system. Furthermore, the system guarantees at-least-once delivery |
||||
// of each message or truncation events until acked. |
||||
|
||||
// ----------------------------------------------------------------------------- |
||||
// Deletion |
||||
// ----------------------------------------------------------------------------- |
||||
|
||||
// Both topics and subscriptions may be deleted. Deletion of a topic implies |
||||
// deletion of all attached subscriptions. |
||||
// |
||||
// When a subscription is deleted directly by calling DeleteSubscription, all |
||||
// messages are immediately dropped. If it is a pull subscriber, future pull |
||||
// requests will return NOT_FOUND. |
||||
// |
||||
// When a topic is deleted all corresponding subscriptions are immediately |
||||
// deleted, and subscribers experience the same behavior as directly deleting |
||||
// the subscription. |
||||
|
||||
// ----------------------------------------------------------------------------- |
||||
// The Publisher service and its protos. |
||||
// ----------------------------------------------------------------------------- |
||||
|
||||
// The service that an application uses to manipulate topics, and to send |
||||
// messages to a topic. |
||||
service PublisherService { |
||||
|
||||
// Creates the given topic with the given name. |
||||
rpc CreateTopic(Topic) returns (Topic) { |
||||
} |
||||
|
||||
// Adds a message to the topic. Returns NOT_FOUND if the topic does not |
||||
// exist. |
||||
// (-- For different error code values returned via Stubby, see |
||||
// util/task/codes.proto. --) |
||||
rpc Publish(PublishRequest) returns (proto2.Empty) { |
||||
} |
||||
|
||||
// Adds one or more messages to the topic. Returns NOT_FOUND if the topic does |
||||
// not exist. |
||||
rpc PublishBatch(PublishBatchRequest) returns (PublishBatchResponse) { |
||||
} |
||||
|
||||
// Gets the configuration of a topic. Since the topic only has the name |
||||
// attribute, this method is only useful to check the existence of a topic. |
||||
// If other attributes are added in the future, they will be returned here. |
||||
rpc GetTopic(GetTopicRequest) returns (Topic) { |
||||
} |
||||
|
||||
// Lists matching topics. |
||||
rpc ListTopics(ListTopicsRequest) returns (ListTopicsResponse) { |
||||
} |
||||
|
||||
// Deletes the topic with the given name. All subscriptions to this topic |
||||
// are also deleted. Returns NOT_FOUND if the topic does not exist. |
||||
// After a topic is deleted, a new topic may be created with the same name. |
||||
rpc DeleteTopic(DeleteTopicRequest) returns (proto2.Empty) { |
||||
} |
||||
} |
||||
|
||||
// A topic resource. |
||||
message Topic { |
||||
// Name of the topic. |
||||
optional string name = 1; |
||||
} |
||||
|
||||
// A message data and its labels. |
||||
message PubsubMessage { |
||||
// The message payload. |
||||
optional bytes data = 1; |
||||
|
||||
// Optional list of labels for this message. Keys in this collection must |
||||
// be unique. |
||||
//(-- TODO(eschapira): Define how key namespace may be scoped to the topic.--) |
||||
repeated tech.label.Label label = 2; |
||||
|
||||
// ID of this message assigned by the server at publication time. Guaranteed |
||||
// to be unique within the topic. This value may be read by a subscriber |
||||
// that receives a PubsubMessage via a Pull call or a push delivery. It must |
||||
// not be populated by a publisher in a Publish call. |
||||
optional string message_id = 3; |
||||
} |
||||
|
||||
// Request for the GetTopic method. |
||||
message GetTopicRequest { |
||||
// The name of the topic to get. |
||||
optional string topic = 1; |
||||
} |
||||
|
||||
// Request for the Publish method. |
||||
message PublishRequest { |
||||
// The message in the request will be published on this topic. |
||||
optional string topic = 1; |
||||
|
||||
// The message to publish. |
||||
optional PubsubMessage message = 2; |
||||
} |
||||
|
||||
// Request for the PublishBatch method. |
||||
message PublishBatchRequest { |
||||
// The messages in the request will be published on this topic. |
||||
optional string topic = 1; |
||||
|
||||
// The messages to publish. |
||||
repeated PubsubMessage messages = 2; |
||||
} |
||||
|
||||
// Response for the PublishBatch method. |
||||
message PublishBatchResponse { |
||||
// The server-assigned ID of each published message, in the same order as |
||||
// the messages in the request. IDs are guaranteed to be unique within |
||||
// the topic. |
||||
repeated string message_ids = 1; |
||||
} |
||||
|
||||
// Request for the ListTopics method. |
||||
message ListTopicsRequest { |
||||
// A valid label query expression. |
||||
// (-- Which labels are required or supported is implementation-specific. --) |
||||
optional string query = 1; |
||||
|
||||
// Maximum number of topics to return. |
||||
// (-- If not specified or <= 0, the implementation will select a reasonable |
||||
// value. --) |
||||
optional int32 max_results = 2; |
||||
|
||||
// The value obtained in the last <code>ListTopicsResponse</code> |
||||
// for continuation. |
||||
optional string page_token = 3; |
||||
|
||||
} |
||||
|
||||
// Response for the ListTopics method. |
||||
message ListTopicsResponse { |
||||
// The resulting topics. |
||||
repeated Topic topic = 1; |
||||
|
||||
// If not empty, indicates that there are more topics that match the request, |
||||
// and this value should be passed to the next <code>ListTopicsRequest</code> |
||||
// to continue. |
||||
optional string next_page_token = 2; |
||||
} |
||||
|
||||
// Request for the Delete method. |
||||
message DeleteTopicRequest { |
||||
// Name of the topic to delete. |
||||
optional string topic = 1; |
||||
} |
||||
|
||||
// ----------------------------------------------------------------------------- |
||||
// The Subscriber service and its protos. |
||||
// ----------------------------------------------------------------------------- |
||||
|
||||
// The service that an application uses to manipulate subscriptions and to |
||||
// consume messages from a subscription via the pull method. |
||||
service SubscriberService { |
||||
|
||||
// Creates a subscription on a given topic for a given subscriber. |
||||
// If the subscription already exists, returns ALREADY_EXISTS. |
||||
// If the corresponding topic doesn't exist, returns NOT_FOUND. |
||||
// |
||||
// If the name is not provided in the request, the server will assign a random |
||||
// name for this subscription on the same project as the topic. |
||||
rpc CreateSubscription(Subscription) returns (Subscription) { |
||||
} |
||||
|
||||
// Gets the configuration details of a subscription. |
||||
rpc GetSubscription(GetSubscriptionRequest) returns (Subscription) { |
||||
} |
||||
|
||||
// Lists matching subscriptions. |
||||
rpc ListSubscriptions(ListSubscriptionsRequest) |
||||
returns (ListSubscriptionsResponse) { |
||||
} |
||||
|
||||
// Deletes an existing subscription. All pending messages in the subscription |
||||
// are immediately dropped. Calls to Pull after deletion will return |
||||
// NOT_FOUND. |
||||
rpc DeleteSubscription(DeleteSubscriptionRequest) returns (proto2.Empty) { |
||||
} |
||||
|
||||
// Removes all the pending messages in the subscription and releases the |
||||
// storage associated with them. Results in a truncation event to be sent to |
||||
// the subscriber. Messages added after this call returns are stored in the |
||||
// subscription as before. |
||||
rpc TruncateSubscription(TruncateSubscriptionRequest) returns (proto2.Empty) { |
||||
} |
||||
|
||||
// |
||||
// Push subscriber calls. |
||||
// |
||||
|
||||
// Modifies the <code>PushConfig</code> for a specified subscription. |
||||
// This method can be used to suspend the flow of messages to an endpoint |
||||
// by clearing the <code>PushConfig</code> field in the request. Messages |
||||
// will be accumulated for delivery even if no push configuration is |
||||
// defined or while the configuration is modified. |
||||
rpc ModifyPushConfig(ModifyPushConfigRequest) returns (proto2.Empty) { |
||||
} |
||||
|
||||
// |
||||
// Pull Subscriber calls |
||||
// |
||||
|
||||
// Pulls a single message from the server. |
||||
// If return_immediately is true, and no messages are available in the |
||||
// subscription, this method returns FAILED_PRECONDITION. The system is free |
||||
// to return an UNAVAILABLE error if no messages are available in a |
||||
// reasonable amount of time (to reduce system load). |
||||
rpc Pull(PullRequest) returns (PullResponse) { |
||||
} |
||||
|
||||
// Pulls messages from the server. Returns an empty list if there are no |
||||
// messages available in the backlog. The system is free to return UNAVAILABLE |
||||
// if there are too many pull requests outstanding for the given subscription. |
||||
rpc PullBatch(PullBatchRequest) returns (PullBatchResponse) { |
||||
} |
||||
|
||||
// Modifies the Ack deadline for a message received from a pull request. |
||||
rpc ModifyAckDeadline(ModifyAckDeadlineRequest) returns (proto2.Empty) { |
||||
} |
||||
|
||||
// Acknowledges a particular received message: the Pub/Sub system can remove |
||||
// the given message from the subscription. Acknowledging a message whose |
||||
// Ack deadline has expired may succeed, but the message could have been |
||||
// already redelivered. Acknowledging a message more than once will not |
||||
// result in an error. This is only used for messages received via pull. |
||||
rpc Acknowledge(AcknowledgeRequest) returns (proto2.Empty) { |
||||
} |
||||
|
||||
// Refuses processing a particular received message. The system will |
||||
// redeliver this message to some consumer of the subscription at some |
||||
// future time. This is only used for messages received via pull. |
||||
rpc Nack(NackRequest) returns (proto2.Empty) { |
||||
} |
||||
} |
||||
|
||||
// A subscription resource. |
||||
message Subscription { |
||||
// Name of the subscription. |
||||
optional string name = 1; |
||||
|
||||
// The name of the topic from which this subscription is receiving messages. |
||||
optional string topic = 2; |
||||
|
||||
// If <code>query</code> is non-empty, only messages on the subscriber's |
||||
// topic whose labels match the query will be returned. Otherwise all |
||||
// messages on the topic will be returned. |
||||
// (-- The query syntax is described in tech/label/proto/label_query.proto --) |
||||
optional string query = 3; |
||||
|
||||
// The subscriber may specify requirements for truncating unacknowledged |
||||
// subscription entries. The system will honor the |
||||
// <code>CreateSubscription</code> request only if it can meet these |
||||
// requirements. If this field is not specified, messages are never truncated |
||||
// by the system. |
||||
optional TruncationPolicy truncation_policy = 4; |
||||
|
||||
// Specifies which messages can be truncated by the system. |
||||
message TruncationPolicy { |
||||
oneof policy { |
||||
// If <code>max_bytes</code> is specified, the system is allowed to drop |
||||
// old messages to keep the combined size of stored messages under |
||||
// <code>max_bytes</code>. This is a hint; the system may keep more than |
||||
// this many bytes, but will make a best effort to keep the size from |
||||
// growing much beyond this parameter. |
||||
int64 max_bytes = 1; |
||||
|
||||
// If <code>max_age_seconds</code> is specified, the system is allowed to |
||||
// drop messages that have been stored for at least this many seconds. |
||||
// This is a hint; the system may keep these messages, but will make a |
||||
// best effort to remove them when their maximum age is reached. |
||||
int64 max_age_seconds = 2; |
||||
} |
||||
} |
||||
|
||||
// If push delivery is used with this subscription, this field is |
||||
// used to configure it. |
||||
optional PushConfig push_config = 5; |
||||
|
||||
// For either push or pull delivery, the value is the maximum time after a |
||||
// subscriber receives a message before the subscriber should acknowledge or |
||||
// Nack the message. If the Ack deadline for a message passes without an |
||||
// Ack or a Nack, the Pub/Sub system will eventually redeliver the message. |
||||
// If a subscriber acknowledges after the deadline, the Pub/Sub system may |
||||
// accept the Ack, but it is possible that the message has been already |
||||
// delivered again. Multiple Acks to the message are allowed and will |
||||
// succeed. |
||||
// |
||||
// For push delivery, this value is used to set the request timeout for |
||||
// the call to the push endpoint. |
||||
// |
||||
// For pull delivery, this value is used as the initial value for the Ack |
||||
// deadline. It may be overridden for a specific pull request (message) with |
||||
// <code>ModifyAckDeadline</code>. |
||||
// While a message is outstanding (i.e. it has been delivered to a pull |
||||
// subscriber and the subscriber has not yet Acked or Nacked), the Pub/Sub |
||||
// system will not deliver that message to another pull subscriber |
||||
// (on a best-effort basis). |
||||
optional int32 ack_deadline_seconds = 6; |
||||
|
||||
// If this parameter is set to n, the system is allowed to (but not required |
||||
// to) delete the subscription when at least n seconds have elapsed since the |
||||
// client presence was detected. (Presence is detected through any |
||||
// interaction using the subscription ID, including Pull(), Get(), or |
||||
// acknowledging a message.) |
||||
// |
||||
// If this parameter is not set, the subscription will stay live until |
||||
// explicitly deleted. |
||||
// |
||||
// Clients can detect such garbage collection when a Get call or a Pull call |
||||
// (for pull subscribers only) returns NOT_FOUND. |
||||
optional int64 garbage_collect_seconds = 7; |
||||
} |
||||
|
||||
// Configuration for a push delivery endpoint. |
||||
message PushConfig { |
||||
// A URL locating the endpoint to which messages should be pushed. |
||||
// For example, a Webhook endpoint might use "https://example.com/push". |
||||
// (-- An Android application might use "gcm:<REGID>", where <REGID> is a |
||||
// GCM registration id allocated for pushing messages to the application. --) |
||||
optional string push_endpoint = 1; |
||||
} |
||||
|
||||
// An event indicating a received message or truncation event. |
||||
message PubsubEvent { |
||||
// The subscription that received the event. |
||||
optional string subscription = 1; |
||||
|
||||
oneof type { |
||||
// A received message. |
||||
PubsubMessage message = 2; |
||||
|
||||
// Indicates that this subscription has been truncated. |
||||
bool truncated = 3; |
||||
|
||||
// Indicates that this subscription has been deleted. (Note that pull |
||||
// subscribers will always receive NOT_FOUND in response in their pull |
||||
// request on the subscription, rather than seeing this boolean.) |
||||
bool deleted = 4; |
||||
} |
||||
} |
||||
|
||||
// Request for the GetSubscription method. |
||||
message GetSubscriptionRequest { |
||||
// The name of the subscription to get. |
||||
optional string subscription = 1; |
||||
} |
||||
|
||||
// Request for the ListSubscriptions method. |
||||
message ListSubscriptionsRequest { |
||||
// A valid label query expression. |
||||
// (-- Which labels are required or supported is implementation-specific. |
||||
// TODO(eschapira): This method must support to query by topic. We must |
||||
// define the key URI for the "topic" label. --) |
||||
optional string query = 1; |
||||
|
||||
// Maximum number of subscriptions to return. |
||||
// (-- If not specified or <= 0, the implementation will select a reasonable |
||||
// value. --) |
||||
optional int32 max_results = 3; |
||||
|
||||
// The value obtained in the last <code>ListSubscriptionsResponse</code> |
||||
// for continuation. |
||||
optional string page_token = 4; |
||||
} |
||||
|
||||
// Response for the ListSubscriptions method. |
||||
message ListSubscriptionsResponse { |
||||
// The subscriptions that match the request. |
||||
repeated Subscription subscription = 1; |
||||
|
||||
// If not empty, indicates that there are more subscriptions that match the |
||||
// request and this value should be passed to the next |
||||
// <code>ListSubscriptionsRequest</code> to continue. |
||||
optional string next_page_token = 2; |
||||
} |
||||
|
||||
// Request for the TruncateSubscription method. |
||||
message TruncateSubscriptionRequest { |
||||
// The subscription that is being truncated. |
||||
optional string subscription = 1; |
||||
} |
||||
|
||||
// Request for the DeleteSubscription method. |
||||
message DeleteSubscriptionRequest { |
||||
// The subscription to delete. |
||||
optional string subscription = 1; |
||||
} |
||||
|
||||
// Request for the ModifyPushConfig method. |
||||
message ModifyPushConfigRequest { |
||||
// The name of the subscription. |
||||
optional string subscription = 1; |
||||
|
||||
// An empty <code>push_config</code> indicates that the Pub/Sub system should |
||||
// pause pushing messages from the given subscription. |
||||
optional PushConfig push_config = 2; |
||||
} |
||||
|
||||
// ----------------------------------------------------------------------------- |
||||
// The protos used by a pull subscriber. |
||||
// ----------------------------------------------------------------------------- |
||||
|
||||
// Request for the Pull method. |
||||
message PullRequest { |
||||
// The subscription from which a message should be pulled. |
||||
optional string subscription = 1; |
||||
|
||||
// If this is specified as true the system will respond immediately even if |
||||
// it is not able to return a message in the Pull response. Otherwise the |
||||
// system is allowed to wait until at least one message is available rather |
||||
// than returning FAILED_PRECONDITION. The client may cancel the request if |
||||
// it does not wish to wait any longer for the response. |
||||
optional bool return_immediately = 2; |
||||
} |
||||
|
||||
// Either a <code>PubsubMessage</code> or a truncation event. One of these two |
||||
// must be populated. |
||||
message PullResponse { |
||||
// This ID must be used to acknowledge the received event or message. |
||||
optional string ack_id = 1; |
||||
|
||||
// A pubsub message or truncation event. |
||||
optional PubsubEvent pubsub_event = 2; |
||||
} |
||||
|
||||
// Request for the PullBatch method. |
||||
message PullBatchRequest { |
||||
// The subscription from which messages should be pulled. |
||||
optional string subscription = 1; |
||||
|
||||
// If this is specified as true the system will respond immediately even if |
||||
// it is not able to return a message in the Pull response. Otherwise the |
||||
// system is allowed to wait until at least one message is available rather |
||||
// than returning no messages. The client may cancel the request if it does |
||||
// not wish to wait any longer for the response. |
||||
optional bool return_immediately = 2; |
||||
|
||||
// The maximum number of PubsubEvents returned for this request. The Pub/Sub |
||||
// system may return fewer than the number of events specified. |
||||
optional int32 max_events = 3; |
||||
} |
||||
|
||||
// Response for the PullBatch method. |
||||
message PullBatchResponse { |
||||
|
||||
// Received Pub/Sub messages or status events. The Pub/Sub system will return |
||||
// zero messages if there are no more messages available in the backlog. The |
||||
// Pub/Sub system may return fewer than the max_events requested even if |
||||
// there are more messages available in the backlog. |
||||
repeated PullResponse pull_responses = 2; |
||||
} |
||||
|
||||
// Request for the ModifyAckDeadline method. |
||||
message ModifyAckDeadlineRequest { |
||||
// The name of the subscription from which messages are being pulled. |
||||
optional string subscription = 1; |
||||
|
||||
// The acknowledgment ID. |
||||
optional string ack_id = 2; |
||||
|
||||
// The new Ack deadline. Must be >= 0. |
||||
optional int32 ack_deadline_seconds = 3; |
||||
} |
||||
|
||||
// Request for the Acknowledge method. |
||||
message AcknowledgeRequest { |
||||
// The subscription whose message is being acknowledged. |
||||
optional string subscription = 1; |
||||
|
||||
// The acknowledgment ID for the message being acknowledged. This was |
||||
// returned by the Pub/Sub system in the Pull response. |
||||
repeated string ack_id = 2; |
||||
} |
||||
|
||||
// Request for the Nack method. |
||||
message NackRequest { |
||||
// The subscription whose message is being Nacked. |
||||
optional string subscription = 1; |
||||
|
||||
// The acknowledgment ID for the message being refused. This was returned by |
||||
// the Pub/Sub system in the Pull response. |
||||
repeated string ack_id = 2; |
||||
} |
||||
|
||||
// ----------------------------------------------------------------------------- |
||||
// The service and protos used by a push subscriber. |
||||
// ----------------------------------------------------------------------------- |
||||
|
||||
// The service that a subscriber uses to handle messages sent via push |
||||
// delivery. |
||||
// This service is not currently exported for HTTP clients. |
||||
// TODO(eschapira): Explain HTTP subscribers. |
||||
service PushEndpointService { |
||||
// Sends a <code>PubsubMessage</code> or a subscription status event to a |
||||
// push endpoint. |
||||
// The push endpoint responds with an empty message and a code from |
||||
// util/task/codes.proto. The following codes have a particular meaning to the |
||||
// Pub/Sub system: |
||||
// OK - This is interpreted by Pub/Sub as Ack. |
||||
// ABORTED - This is intepreted by Pub/Sub as a Nack, without implying |
||||
// pushback for congestion control. The Pub/Sub system will |
||||
// retry this message at a later time. |
||||
// UNAVAILABLE - This is intepreted by Pub/Sub as a Nack, with the additional |
||||
// semantics of push-back. The Pub/Sub system will use an AIMD |
||||
// congestion control algorithm to backoff the rate of sending |
||||
// messages from this subscription. |
||||
// Any other code, or a failure to respond, will be interpreted in the same |
||||
// way as ABORTED; i.e. the system will retry the message at a later time to |
||||
// ensure reliable delivery. |
||||
rpc HandlePubsubEvent(PubsubEvent) returns (proto2.Empty); |
||||
} |
||||
@ -0,0 +1,45 @@ |
||||
/*
|
||||
* |
||||
* Copyright 2015, Google Inc. |
||||
* All rights reserved. |
||||
* |
||||
* Redistribution and use in source and binary forms, with or without |
||||
* modification, are permitted provided that the following conditions are |
||||
* met: |
||||
* |
||||
* * Redistributions of source code must retain the above copyright |
||||
* notice, this list of conditions and the following disclaimer. |
||||
* * Redistributions in binary form must reproduce the above |
||||
* copyright notice, this list of conditions and the following disclaimer |
||||
* in the documentation and/or other materials provided with the |
||||
* distribution. |
||||
* * Neither the name of Google Inc. nor the names of its |
||||
* contributors may be used to endorse or promote products derived from |
||||
* this software without specific prior written permission. |
||||
* |
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
||||
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
||||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||||
* |
||||
*/ |
||||
|
||||
#ifndef __GRPC_INTERNAL_IOMGR_POLLSET_KICK_WINDOWS_H_ |
||||
#define __GRPC_INTERNAL_IOMGR_POLLSET_KICK_WINDOWS_H_ |
||||
|
||||
#include <grpc/support/sync.h> |
||||
|
||||
struct grpc_kick_pipe_info; |
||||
|
||||
typedef struct grpc_pollset_kick_state { |
||||
int unused; |
||||
} grpc_pollset_kick_state; |
||||
|
||||
#endif /* __GRPC_INTERNAL_IOMGR_POLLSET_KICK_WINDOWS_H_ */ |
||||
@ -0,0 +1,54 @@ |
||||
/*
|
||||
* |
||||
* Copyright 2014, Google Inc. |
||||
* All rights reserved. |
||||
* |
||||
* Redistribution and use in source and binary forms, with or without |
||||
* modification, are permitted provided that the following conditions are |
||||
* met: |
||||
* |
||||
* * Redistributions of source code must retain the above copyright |
||||
* notice, this list of conditions and the following disclaimer. |
||||
* * Redistributions in binary form must reproduce the above |
||||
* copyright notice, this list of conditions and the following disclaimer |
||||
* in the documentation and/or other materials provided with the |
||||
* distribution. |
||||
* * Neither the name of Google Inc. nor the names of its |
||||
* contributors may be used to endorse or promote products derived from |
||||
* this software without specific prior written permission. |
||||
* |
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
||||
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
||||
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
||||
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
||||
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
||||
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||||
* |
||||
*/ |
||||
|
||||
#ifndef __GRPC_INTERNAL_IOMGR_POLLSET_WINDOWS_H_ |
||||
#define __GRPC_INTERNAL_IOMGR_POLLSET_WINDOWS_H_ |
||||
|
||||
#include <grpc/support/sync.h> |
||||
|
||||
#include "src/core/iomgr/pollset_kick.h" |
||||
|
||||
/* forward declare only in this file to avoid leaking impl details via
|
||||
pollset.h; real users of grpc_fd should always include 'fd_posix.h' and not |
||||
use the struct tag */ |
||||
struct grpc_fd; |
||||
|
||||
typedef struct grpc_pollset { |
||||
gpr_mu mu; |
||||
gpr_cv cv; |
||||
} grpc_pollset; |
||||
|
||||
#define GRPC_POLLSET_MU(pollset) (&(pollset)->mu) |
||||
#define GRPC_POLLSET_CV(pollset) (&(pollset)->cv) |
||||
|
||||
#endif /* __GRPC_INTERNAL_IOMGR_POLLSET_WINDOWS_H_ */ |
||||
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