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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;
require_once realpath(dirname(__FILE__) . '/../autoload.php');
/**
* Represents an active call that allows sending and recieving binary data
*/
class ActiveCall {
private $completion_queue;
private $call;
private $flags;
private $metadata;
/**
* Create a new active call.
* @param Channel $channel The channel to communicate on
* @param string $method The method to call on the remote server
* @param array $metadata Metadata to send with the call, if applicable
* @param long $flags Write flags to use with this call
*/
public function __construct(Channel $channel,
$method,
$metadata = array(),
$flags = 0) {
$this->completion_queue = new CompletionQueue();
$this->call = new Call($channel, $method, Timeval::inf_future());
$this->call->add_metadata($metadata, 0);
$this->flags = $flags;
// Invoke the call.
$this->call->invoke($this->completion_queue,
CLIENT_METADATA_READ,
FINISHED, 0);
$metadata_event = $this->completion_queue->pluck(CLIENT_METADATA_READ,
Timeval::inf_future());
$this->metadata = $metadata_event->data;
}
/**
* @return The metadata sent by the server.
*/
public function getMetadata() {
return $this->metadata;
}
/**
* Cancels the call
*/
public function cancel() {
$this->call->cancel();
}
/**
* Read a single message from the server.
* @return The next message from the server, or null if there is none.
*/
public function read() {
$this->call->start_read(READ);
$read_event = $this->completion_queue->pluck(READ, Timeval::inf_future());
return $read_event->data;
}
/**
* Write a single message to the server. This cannot be called after
* writesDone is called.
* @param ByteBuffer $data The data to write
*/
public function write($data) {
$this->call->start_write($data, WRITE_ACCEPTED, $this->flags);
$this->completion_queue->pluck(WRITE_ACCEPTED, Timeval::inf_future());
}
/**
* Indicate that no more writes will be sent.
*/
public function writesDone() {
$this->call->writes_done(FINISH_ACCEPTED);
$this->completion_queue->pluck(FINISH_ACCEPTED, Timeval::inf_future());
}
/**
* Wait for the server to send the status, and return it.
* @return object The status object, with integer $code, string $details,
* and array $metadata members
*/
public function getStatus() {
$status_event = $this->completion_queue->pluck(FINISHED,
Timeval::inf_future());
return $status_event->data;
}
}
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