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/tags/release-0.1-rc2/hive/external/service/lib/php/transport/TTransport.php

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PHP | 108 lines | 28 code | 14 blank | 66 comment | 1 complexity | bdb226b4fdbc45445bb6937c33e42f7c MD5 | raw file
  1<?php
  2/*
  3 * Licensed to the Apache Software Foundation (ASF) under one
  4 * or more contributor license agreements. See the NOTICE file
  5 * distributed with this work for additional information
  6 * regarding copyright ownership. The ASF licenses this file
  7 * to you under the Apache License, Version 2.0 (the
  8 * "License"); you may not use this file except in compliance
  9 * with the License. You may obtain a copy of the License at
 10 *
 11 *   http://www.apache.org/licenses/LICENSE-2.0
 12 *
 13 * Unless required by applicable law or agreed to in writing,
 14 * software distributed under the License is distributed on an
 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 16 * KIND, either express or implied. See the License for the
 17 * specific language governing permissions and limitations
 18 * under the License.
 19 *
 20 * @package thrift.transport
 21 */
 22
 23
 24/**
 25 * Transport exceptions
 26 */
 27class TTransportException extends TException {
 28
 29  const UNKNOWN = 0;
 30  const NOT_OPEN = 1;
 31  const ALREADY_OPEN = 2;
 32  const TIMED_OUT = 3;
 33  const END_OF_FILE = 4;
 34
 35  function __construct($message=null, $code=0) {
 36    parent::__construct($message, $code);
 37  }
 38}
 39
 40/**
 41 * Base interface for a transport agent.
 42 *
 43 * @package thrift.transport
 44 */
 45abstract class TTransport {
 46
 47  /**
 48   * Whether this transport is open.
 49   *
 50   * @return boolean true if open
 51   */
 52  public abstract function isOpen();
 53
 54  /**
 55   * Open the transport for reading/writing
 56   *
 57   * @throws TTransportException if cannot open
 58   */
 59  public abstract function open();
 60
 61  /**
 62   * Close the transport.
 63   */
 64  public abstract function close();
 65
 66  /**
 67   * Read some data into the array.
 68   *
 69   * @param int    $len How much to read
 70   * @return string The data that has been read
 71   * @throws TTransportException if cannot read any more data
 72   */
 73  public abstract function read($len);
 74
 75  /**
 76   * Guarantees that the full amount of data is read.
 77   *
 78   * @return string The data, of exact length
 79   * @throws TTransportException if cannot read data
 80   */
 81  public function readAll($len) {
 82    // return $this->read($len);
 83
 84    $data = '';
 85    $got = 0;
 86    while (($got = strlen($data)) < $len) {
 87      $data .= $this->read($len - $got);
 88    }
 89    return $data;
 90  }
 91
 92  /**
 93   * Writes the given data out.
 94   *
 95   * @param string $buf  The data to write
 96   * @throws TTransportException if writing fails
 97   */
 98  public abstract function write($buf);
 99
100  /**
101   * Flushes any pending data out of a buffer
102   *
103   * @throws TTransportException if a writing error occurs
104   */
105  public function flush() {}
106}
107
108?>