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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;
/**
* Represents an active call that allows for sending and recieving messages
* in streams in any order.
*/
class BidiStreamingCall extends AbstractCall
{
/**
* Start the call.
*
* @param array $metadata Metadata to send with the call, if applicable
* (optional)
*/
public function start(array $metadata = [])
{
$this->call->startBatch([
OP_SEND_INITIAL_METADATA => $metadata,
]);
}
/**
* Reads the next value from the server.
*
* @return mixed The next value from the server, or null if there is none
*/
public function read()
{
$batch = [OP_RECV_MESSAGE => true];
if ($this->metadata === null) {
$batch[OP_RECV_INITIAL_METADATA] = true;
}
$read_event = $this->call->startBatch($batch);
if ($this->metadata === null) {
$this->metadata = $read_event->metadata;
}
return $this->_deserializeResponse($read_event->message);
}
/**
* Write a single message to the server. This cannot be called after
* writesDone is called.
*
* @param ByteBuffer $data The data to write
* @param array $options An array of options, possible keys:
* 'flags' => a number (optional)
*/
public function write($data, array $options = [])
{
$message_array = ['message' => $this->_serializeMessage($data)];
if (array_key_exists('flags', $options)) {
$message_array['flags'] = $options['flags'];
}
$this->call->startBatch([
OP_SEND_MESSAGE => $message_array,
]);
}
/**
* Indicate that no more writes will be sent.
*/
public function writesDone()
{
$this->call->startBatch([
OP_SEND_CLOSE_FROM_CLIENT => true,
]);
}
/**
* Wait for the server to send the status, and return it.
*
* @return \stdClass The status object, with integer $code, string
* $details, and array $metadata members
*/
public function getStatus()
{
$status_event = $this->call->startBatch([
OP_RECV_STATUS_ON_CLIENT => true,
]);
$this->trailing_metadata = $status_event->status->metadata;
return $status_event->status;
}
}
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