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<?php
/*
*
* 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.
*
*/
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
if (method_exists($data, 'encode')) {
return $data->encode();
} elseif (method_exists($data, 'serializeToString')) {
return $data->serializeToString();
}
// Protobuf-PHP implementation
return $data->serialize();
}
/**
* 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 ($value === null) {
return;
}
// Proto3 implementation
if (is_array($this->deserialize)) {
list($className, $deserializeFunc) = $this->deserialize;
$obj = new $className();
if (method_exists($obj, $deserializeFunc)) {
$obj->$deserializeFunc($value);
} else {
$obj->mergeFromString($value);
}
return $obj;
}
// Protobuf-PHP implementation
return call_user_func($this->deserialize, $value);
}
/**
* Set the CallCredentials for the underlying Call.
*
* @param CallCredentials $call_credentials The CallCredentials object
*/
public function setCallCredentials($call_credentials)
{
$this->call->setCredentials($call_credentials);
}
}
|
