src/php/lib/Grpc/SimpleSurfaceActiveCall.php

<?php
namespace Grpc;

require_once realpath(dirname(__FILE__) . '/../autoload.php');

/**
 * Represents an active call that sends a single message and then gets a single
 * response.
 */
class SimpleSurfaceActiveCall extends AbstractSurfaceActiveCall {
  /**
   * Create a new simple (single request/single response) active call.
   * @param Channel $channel The channel to communicate on
   * @param string $method The method to call on the remote server
   * @param callable $deserialize The function to deserialize a value
   * @param $arg The argument to send
   * @param array $metadata Metadata to send with the call, if applicable
   */
  public function __construct(Channel $channel,
                              $method,
                              callable $deserialize,
                              $arg,
                              $metadata = array()) {
    parent::__construct($channel, $method, $deserialize, $metadata,
                        \Grpc\WRITE_BUFFER_HINT);
    $this->_write($arg);
    $this->_writesDone();
  }

  /**
   * Wait for the server to respond with data and a status
   * @return [response data, status]
   */
  public function wait() {
    $response = $this->_read();
    $status = $this->_getStatus();
    return array($response, $status);
  }
}