PHP: php server commit 3/n, add ServerContext and MethodDescriptor (#25399)

* add ServerContext and MethodDescriptor

* re-run generate_projects.sh

src/php/lib/Grpc/MethodDescriptor.php

@@ -0,0 +1,52 @@
+<?php
+/*
+ *
+ * Copyright 2020 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+namespace Grpc;
+
+/**
+ * This is an experimental and incomplete implementation of gRPC server
+ * for PHP. APIs are _definitely_ going to be changed.
+ *
+ * DO NOT USE in production.
+ */
+
+class MethodDescriptor
+{
+    public function __construct(
+        object $service,
+        string $method_name,
+        string $request_type,
+        int $call_type
+    ) {
+        $this->service = $service;
+        $this->method_name = $method_name;
+        $this->request_type = $request_type;
+        $this->call_type = $call_type;
+    }
+
+    public const UNARY_CALL = 0;
+    public const SERVER_STREAMING_CALL = 1;
+    public const CLIENT_STREAMING_CALL = 2;
+    public const BIDI_STREAMING_CALL = 3;
+
+    public $service;
+    public $method_name;
+    public $request_type;
+    public $call_type;
+}

src/php/lib/Grpc/ServerContext.php

@@ -0,0 +1,54 @@
+<?php
+/*
+ *
+ * Copyright 2020 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+namespace Grpc;
+
+/**
+ * This is an experimental and incomplete implementation of gRPC server
+ * for PHP. APIs are _definitely_ going to be changed.
+ *
+ * DO NOT USE in production.
+ */
+
+class ServerContext
+{
+    public function __construct($event)
+    {
+        $this->event = $event;
+    }
+
+    public function clientMetadata()
+    {
+        return $this->event->metadata;
+    }
+    public function deadline()
+    {
+        return $this->event->absolute_deadline;
+    }
+    public function host()
+    {
+        return $this->event->host;
+    }
+    public function method()
+    {
+        return $this->event->method;
+    }
+
+    private $event;
+}

tools/doxygen/Doxyfile.php

@@ -812,10 +812,12 @@ src/php/lib/Grpc/ClientStreamingCall.php \
 src/php/lib/Grpc/Constants.php \
 src/php/lib/Grpc/DefaultCallInvoker.php \
 src/php/lib/Grpc/Interceptor.php \
+src/php/lib/Grpc/MethodDescriptor.php \
 src/php/lib/Grpc/RpcServer.php \
 src/php/lib/Grpc/Server.php \
 src/php/lib/Grpc/ServerCallReader.php \
 src/php/lib/Grpc/ServerCallWriter.php \
+src/php/lib/Grpc/ServerContext.php \
 src/php/lib/Grpc/ServerCredentials.php \
 src/php/lib/Grpc/ServerStreamingCall.php \
 src/php/lib/Grpc/Status.php \