| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| package org.apache.thrift.transport; |
| |
| import java.io.ByteArrayInputStream; |
| |
| import org.apache.thrift.TByteArrayOutputStream; |
| |
| /** |
| * Socket implementation of the TTransport interface. To be commented soon! |
| * |
| */ |
| public class TFramedTransport extends TTransport { |
| |
| /** |
| * Underlying transport |
| */ |
| private TTransport transport_ = null; |
| |
| /** |
| * Buffer for output |
| */ |
| private final TByteArrayOutputStream writeBuffer_ = |
| new TByteArrayOutputStream(1024); |
| |
| /** |
| * Buffer for input |
| */ |
| private ByteArrayInputStream readBuffer_ = null; |
| |
| public static class Factory extends TTransportFactory { |
| public Factory() { |
| } |
| |
| public TTransport getTransport(TTransport base) { |
| return new TFramedTransport(base); |
| } |
| } |
| |
| /** |
| * Constructor wraps around another tranpsort |
| */ |
| public TFramedTransport(TTransport transport) { |
| transport_ = transport; |
| } |
| |
| public void open() throws TTransportException { |
| transport_.open(); |
| } |
| |
| public boolean isOpen() { |
| return transport_.isOpen(); |
| } |
| |
| public void close() { |
| transport_.close(); |
| } |
| |
| public int read(byte[] buf, int off, int len) throws TTransportException { |
| if (readBuffer_ != null) { |
| int got = readBuffer_.read(buf, off, len); |
| if (got > 0) { |
| return got; |
| } |
| } |
| |
| // Read another frame of data |
| readFrame(); |
| |
| return readBuffer_.read(buf, off, len); |
| } |
| |
| private void readFrame() throws TTransportException { |
| byte[] i32rd = new byte[4]; |
| transport_.readAll(i32rd, 0, 4); |
| int size = |
| ((i32rd[0] & 0xff) << 24) | |
| ((i32rd[1] & 0xff) << 16) | |
| ((i32rd[2] & 0xff) << 8) | |
| ((i32rd[3] & 0xff)); |
| |
| byte[] buff = new byte[size]; |
| transport_.readAll(buff, 0, size); |
| readBuffer_ = new ByteArrayInputStream(buff); |
| } |
| |
| public void write(byte[] buf, int off, int len) throws TTransportException { |
| writeBuffer_.write(buf, off, len); |
| } |
| |
| public void flush() throws TTransportException { |
| byte[] buf = writeBuffer_.get(); |
| int len = writeBuffer_.len(); |
| writeBuffer_.reset(); |
| |
| byte[] i32out = new byte[4]; |
| i32out[0] = (byte)(0xff & (len >> 24)); |
| i32out[1] = (byte)(0xff & (len >> 16)); |
| i32out[2] = (byte)(0xff & (len >> 8)); |
| i32out[3] = (byte)(0xff & (len)); |
| transport_.write(i32out, 0, 4); |
| transport_.write(buf, 0, len); |
| transport_.flush(); |
| } |
| } |