src/php/lib/Grpc/SimpleSurfaceActiveCall.php

<?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,
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 *
 */
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);
  }
}