grpc/php/files/UnaryCall.php.txt

<?php
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 *
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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 $arg The argument to send
   * @param array $metadata Metadata to send with the call, if applicable
   */
  public function start($arg, $metadata = array()) {
    $event = $this->call->startBatch([
        OP_SEND_INITIAL_METADATA => $metadata,
        OP_RECV_INITIAL_METADATA => true,
        OP_SEND_MESSAGE => $arg->serialize(),
        OP_SEND_CLOSE_FROM_CLIENT => true]);
    $this->metadata = $event->metadata;
  }

  /**
   * Wait for the server to respond with data and a status
   * @return [response data, status]
   */
  public function wait() {
    $event = $this->call->startBatch([
        OP_RECV_MESSAGE => true,
        OP_RECV_STATUS_ON_CLIENT => true]);
    return array($this->deserializeResponse($event->message), $event->status);
  }
}