org.apache.thrift.transport.TMemoryTransport Maven / Gradle / Ivy
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/*
* 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.nio.ByteBuffer;
import org.apache.thrift.TByteArrayOutputStream;
import org.apache.thrift.TConfiguration;
/** In memory transport with separate buffers for input and output. */
public class TMemoryTransport extends TEndpointTransport {
private final ByteBuffer inputBuffer;
private final TByteArrayOutputStream outputBuffer;
public TMemoryTransport(byte[] input) throws TTransportException {
super(new TConfiguration());
inputBuffer = ByteBuffer.wrap(input);
outputBuffer = new TByteArrayOutputStream(1024);
updateKnownMessageSize(input.length);
}
public TMemoryTransport(TConfiguration config, byte[] input) throws TTransportException {
super(config);
inputBuffer = ByteBuffer.wrap(input);
outputBuffer = new TByteArrayOutputStream(1024);
updateKnownMessageSize(input.length);
}
@Override
public boolean isOpen() {
return true;
}
/** Opening on an in memory transport should have no effect. */
@Override
public void open() {
// Do nothing.
}
@Override
public void close() {
// Do nothing.
}
@Override
public int read(byte[] buf, int off, int len) throws TTransportException {
checkReadBytesAvailable(len);
int remaining = inputBuffer.remaining();
if (remaining < len) {
throw new TTransportException(
TTransportException.END_OF_FILE,
"There's only " + remaining + "bytes, but it asks for " + len);
}
inputBuffer.get(buf, off, len);
return len;
}
@Override
public void write(byte[] buf, int off, int len) throws TTransportException {
outputBuffer.write(buf, off, len);
}
/**
* Get all the bytes written by thrift output protocol.
*
* @return a byte array.
*/
public TByteArrayOutputStream getOutput() {
return outputBuffer;
}
}