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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
https://grpc.io/
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174 lines
6.2 KiB
174 lines
6.2 KiB
/* |
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* |
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* Copyright 2015, 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 |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following disclaimer |
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* in the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Google Inc. nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (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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#include "test/core/util/reconnect_server.h" |
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#include <grpc/grpc.h> |
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#include <grpc/support/alloc.h> |
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#include <grpc/support/host_port.h> |
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#include <grpc/support/log.h> |
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#include <grpc/support/sync.h> |
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#include <grpc/support/time.h> |
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#include <string.h> |
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#include "src/core/iomgr/endpoint.h" |
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#include "src/core/iomgr/sockaddr.h" |
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#include "src/core/iomgr/tcp_server.h" |
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#include "test/core/util/port.h" |
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static void pretty_print_backoffs(reconnect_server *server) { |
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gpr_timespec diff; |
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int i = 1; |
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double expected_backoff = 1000.0, backoff; |
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timestamp_list *head = server->head; |
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gpr_log(GPR_INFO, "reconnect server: new connection"); |
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for (head = server->head; head && head->next; head = head->next, i++) { |
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diff = gpr_time_sub(head->next->timestamp, head->timestamp); |
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backoff = gpr_time_to_millis(diff); |
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gpr_log(GPR_INFO, |
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"retry %2d:backoff %6.2fs,expected backoff %6.2fs, jitter %4.2f%%", |
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i, backoff / 1000.0, expected_backoff / 1000.0, |
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(backoff - expected_backoff) * 100.0 / expected_backoff); |
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expected_backoff *= 1.6; |
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if (expected_backoff > 120 * 1000) { |
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expected_backoff = 120 * 1000; |
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} |
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} |
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} |
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static void on_connect(grpc_exec_ctx *exec_ctx, void *arg, grpc_endpoint *tcp) { |
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char *peer; |
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char *last_colon; |
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reconnect_server *server = (reconnect_server *)arg; |
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gpr_timespec now = gpr_now(GPR_CLOCK_REALTIME); |
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timestamp_list *new_tail; |
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peer = grpc_endpoint_get_peer(tcp); |
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grpc_endpoint_shutdown(exec_ctx, tcp); |
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grpc_endpoint_destroy(exec_ctx, tcp); |
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if (peer) { |
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last_colon = strrchr(peer, ':'); |
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if (server->peer == NULL) { |
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server->peer = peer; |
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} else { |
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if (last_colon == NULL) { |
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gpr_log(GPR_ERROR, "peer does not contain a ':'"); |
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} else if (strncmp(server->peer, peer, (size_t)(last_colon - peer)) != |
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0) { |
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gpr_log(GPR_ERROR, "mismatched peer! %s vs %s", server->peer, peer); |
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} |
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gpr_free(peer); |
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} |
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} |
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new_tail = gpr_malloc(sizeof(timestamp_list)); |
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new_tail->timestamp = now; |
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new_tail->next = NULL; |
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if (server->tail == NULL) { |
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server->head = new_tail; |
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server->tail = new_tail; |
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} else { |
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server->tail->next = new_tail; |
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server->tail = new_tail; |
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} |
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pretty_print_backoffs(server); |
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} |
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void reconnect_server_init(reconnect_server *server) { |
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grpc_init(); |
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server->tcp_server = NULL; |
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grpc_pollset_init(&server->pollset); |
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server->pollsets[0] = &server->pollset; |
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server->head = NULL; |
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server->tail = NULL; |
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server->peer = NULL; |
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} |
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void reconnect_server_start(reconnect_server *server, int port) { |
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struct sockaddr_in addr; |
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int port_added; |
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grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
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addr.sin_family = AF_INET; |
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addr.sin_port = htons((gpr_uint16)port); |
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memset(&addr.sin_addr, 0, sizeof(addr.sin_addr)); |
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server->tcp_server = grpc_tcp_server_create(); |
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port_added = |
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grpc_tcp_server_add_port(server->tcp_server, &addr, sizeof(addr)); |
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GPR_ASSERT(port_added == port); |
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grpc_tcp_server_start(&exec_ctx, server->tcp_server, server->pollsets, 1, |
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on_connect, server); |
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gpr_log(GPR_INFO, "reconnect tcp server listening on 0.0.0.0:%d", port); |
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grpc_exec_ctx_finish(&exec_ctx); |
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} |
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void reconnect_server_poll(reconnect_server *server, int seconds) { |
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grpc_pollset_worker worker; |
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gpr_timespec deadline = |
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gpr_time_add(gpr_now(GPR_CLOCK_MONOTONIC), |
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gpr_time_from_seconds(seconds, GPR_TIMESPAN)); |
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grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
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gpr_mu_lock(GRPC_POLLSET_MU(&server->pollset)); |
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grpc_pollset_work(&exec_ctx, &server->pollset, &worker, |
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gpr_now(GPR_CLOCK_MONOTONIC), deadline); |
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gpr_mu_unlock(GRPC_POLLSET_MU(&server->pollset)); |
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grpc_exec_ctx_finish(&exec_ctx); |
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} |
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void reconnect_server_clear_timestamps(reconnect_server *server) { |
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timestamp_list *new_head = server->head; |
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while (server->head) { |
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new_head = server->head->next; |
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gpr_free(server->head); |
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server->head = new_head; |
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} |
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server->tail = NULL; |
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gpr_free(server->peer); |
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server->peer = NULL; |
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} |
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static void do_nothing(grpc_exec_ctx *exec_ctx, void *ignored, int success) {} |
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void reconnect_server_destroy(reconnect_server *server) { |
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grpc_exec_ctx exec_ctx = GRPC_EXEC_CTX_INIT; |
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grpc_closure do_nothing_closure[2]; |
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grpc_closure_init(&do_nothing_closure[0], do_nothing, NULL); |
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grpc_closure_init(&do_nothing_closure[1], do_nothing, NULL); |
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grpc_tcp_server_destroy(&exec_ctx, server->tcp_server, |
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&do_nothing_closure[0]); |
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reconnect_server_clear_timestamps(server); |
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grpc_pollset_shutdown(&exec_ctx, &server->pollset, &do_nothing_closure[1]); |
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grpc_exec_ctx_finish(&exec_ctx); |
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grpc_pollset_destroy(&server->pollset); |
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grpc_shutdown(); |
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}
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