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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 sends a single message and then gets a
* single response.
*/
class UnaryCall extends AbstractCall
{
/**
* Start the call.
*
* @param mixed $data The data to send
* @param array $metadata Metadata to send with the call, if applicable
* (optional)
* @param array $options An array of options, possible keys:
* 'flags' => a number (optional)
*/
public function start($data, array $metadata = [], array $options = [])
{
$message_array = ['message' => $this->_serializeMessage($data)];
if (isset($options['flags'])) {
$message_array['flags'] = $options['flags'];
}
$this->call->startBatch([
OP_SEND_INITIAL_METADATA => $metadata,
OP_SEND_MESSAGE => $message_array,
OP_SEND_CLOSE_FROM_CLIENT => true,
]);
}
/**
* Wait for the server to respond with data and a status.
*
* @return array [response data, status]
*/
public function wait()
{
$batch = [
OP_RECV_MESSAGE => true,
OP_RECV_STATUS_ON_CLIENT => true,
];
if ($this->metadata === null) {
$batch[OP_RECV_INITIAL_METADATA] = true;
}
$event = $this->call->startBatch($batch);
if ($this->metadata === null) {
$this->metadata = $event->metadata;
}
$status = $event->status;
$this->trailing_metadata = $status->metadata;
return [$this->_deserializeResponse($event->message), $status];
}
/**
* @return mixed The metadata sent by the server
*/
public function getMetadata()
{
if ($this->metadata === null) {
$event = $this->call->startBatch([OP_RECV_INITIAL_METADATA => true]);
$this->metadata = $event->metadata;
}
return $this->metadata;
}
}
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