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<?php
/*
 *
 * Copyright 2018 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\Gcp;

/**
 * ChannelRef is used to record how many active streams the channel has.
 * This is a private class
 */
class ChannelRef
{
    // $opts has all information except Credentials for creating a Grpc\Channel.
    private $opts;

    private $channel_id;
    private $affinity_ref;
    private $active_stream_ref;
    private $target;

    private $has_deserialized;
    private $real_channel;

    public function __construct($target, $channel_id, $opts, $affinity_ref=0, $active_stream_ref=0)
    {
        $this->target = $target;
        $this->channel_id = $channel_id;
        $this->affinity_ref = $affinity_ref;
        $this->active_stream_ref = $active_stream_ref;
        $this->opts = $opts;
        $this->has_deserialized = new CreatedByDeserializeCheck();
    }

    public function getRealChannel($credentials)
    {
        // TODO(ddyihai): remove this check once the serialize handler for
        // \Grpc\Channel is implemented(issue https://github.com/grpc/grpc/issues/15870).
        if (!$this->has_deserialized->getData()) {
            // $real_channel exists and is not created by the deserialization.
            return $this->real_channel;
        }
        // If this ChannelRef is created by deserialization, $real_channel is invalid
        // thus needs to be recreated becasue Grpc\Channel don't have serialize and
        // deserialize handler.
        // Since [target + augments + credentials] will be the same during the recreation,
        // it will reuse the underline grpc channel in C extension without creating a
        // new connection.

        // 'credentials' in the array $opts will be unset during creating the channel.
        if (!array_key_exists('credentials', $this->opts)) {
            $this->opts['credentials'] = $credentials;
        }
        $real_channel = new \Grpc\Channel($this->target, $this->opts);
        $this->real_channel = $real_channel;
        // Set deserialization to false so it won't be recreated within the same script.
        $this->has_deserialized->setData(0);
        return $real_channel;
    }

    public function getAffinityRef()
    {
        return $this->affinity_ref;
    }
    public function getActiveStreamRef()
    {
        return $this->active_stream_ref;
    }
    public function affinityRefIncr()
    {
        $this->affinity_ref += 1;
    }
    public function affinityRefDecr()
    {
        $this->affinity_ref -= 1;
    }
    public function activeStreamRefIncr()
    {
        $this->active_stream_ref += 1;
    }
    public function activeStreamRefDecr()
    {
        $this->active_stream_ref -= 1;
    }
}

Filemanager

Name Type Size Permission Actions
generated Folder 2755
ChannelRef.php File 3.17 KB 0644
Config.php File 4.23 KB 0644
CreatedByDeserializeCheck.php File 1.62 KB 0644
GCPBidiStreamingCall.php File 3.11 KB 0644
GCPCallInvoker.php File 2.89 KB 0644
GCPClientStreamCall.php File 2.38 KB 0644
GCPServerStreamCall.php File 2.72 KB 0644
GCPUnaryCall.php File 2.13 KB 0644
GcpBaseCall.php File 6.58 KB 0644
GcpExtensionChannel.php File 10.04 KB 0644
grpc_gcp.proto File 2.53 KB 0644