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<?php
/*
*
* Copyright 2015 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;
/**
* Class AbstractCall.
* @package Grpc
*/
abstract class AbstractCall
{
/**
* @var Call
*/
protected $call;
protected $deserialize;
protected $metadata;
protected $trailing_metadata;
/**
* Create a new Call wrapper object.
*
* @param Channel $channel The channel to communicate on
* @param string $method The method to call on the
* remote server
* @param callback $deserialize A callback function to deserialize
* the response
* @param array $options Call options (optional)
*/
public function __construct(Channel $channel,
$method,
$deserialize,
array $options = [])
{
if (array_key_exists('timeout', $options) &&
is_numeric($timeout = $options['timeout'])
) {
$now = Timeval::now();
$delta = new Timeval($timeout);
$deadline = $now->add($delta);
} else {
$deadline = Timeval::infFuture();
}
$this->call = new Call($channel, $method, $deadline);
$this->deserialize = $deserialize;
$this->metadata = null;
$this->trailing_metadata = null;
if (array_key_exists('call_credentials_callback', $options) &&
is_callable($call_credentials_callback =
$options['call_credentials_callback'])
) {
$call_credentials = CallCredentials::createFromPlugin(
$call_credentials_callback
);
$this->call->setCredentials($call_credentials);
}
}
/**
* @return mixed The metadata sent by the server
*/
public function getMetadata()
{
return $this->metadata;
}
/**
* @return mixed The trailing metadata sent by the server
*/
public function getTrailingMetadata()
{
return $this->trailing_metadata;
}
/**
* @return string The URI of the endpoint
*/
public function getPeer()
{
return $this->call->getPeer();
}
/**
* Cancels the call.
*/
public function cancel()
{
$this->call->cancel();
}
/**
* Serialize a message to the protobuf binary format.
*
* @param mixed $data The Protobuf message
*
* @return string The protobuf binary format
*/
protected function _serializeMessage($data)
{
// Proto3 implementation
return $data->serializeToString();
}
/**
* Deserialize a response value to an object.
*
* @param string $value The binary value to deserialize
*
* @return mixed The deserialized value
*/
protected function _deserializeResponse($value)
{
if ($value === null) {
return;
}
list($className, $deserializeFunc) = $this->deserialize;
$obj = new $className();
$obj->mergeFromString($value);
return $obj;
}
/**
* Set the CallCredentials for the underlying Call.
*
* @param CallCredentials $call_credentials The CallCredentials object
*/
public function setCallCredentials($call_credentials)
{
$this->call->setCredentials($call_credentials);
}
}
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