org.apache.hudi.org.apache.commons.io.output.TeeOutputStream Maven / Gradle / Ivy
/*
* 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.commons.io.output;
import java.io.IOException;
import java.io.OutputStream;
/**
* Classic splitter of {@link OutputStream}. Named after the Unix 'tee' command. It allows a stream to be branched off
* so there are now two streams.
*/
public class TeeOutputStream extends ProxyOutputStream {
/**
* The second OutputStream to write to.
*
* TODO Make private and final in 3.0.
*/
protected OutputStream branch;
/**
* Constructs a TeeOutputStream.
*
* @param out the main OutputStream
* @param branch the second OutputStream
*/
public TeeOutputStream(final OutputStream out, final OutputStream branch) {
super(out);
this.branch = branch;
}
/**
* Writes the bytes to both streams.
*
* @param b the bytes to write
* @throws IOException if an I/O error occurs.
*/
@Override
public synchronized void write(final byte[] b) throws IOException {
super.write(b);
this.branch.write(b);
}
/**
* Writes the specified bytes to both streams.
*
* @param b the bytes to write
* @param off The start offset
* @param len The number of bytes to write
* @throws IOException if an I/O error occurs.
*/
@Override
public synchronized void write(final byte[] b, final int off, final int len) throws IOException {
super.write(b, off, len);
this.branch.write(b, off, len);
}
/**
* Writes a byte to both streams.
*
* @param b the byte to write
* @throws IOException if an I/O error occurs.
*/
@Override
public synchronized void write(final int b) throws IOException {
super.write(b);
this.branch.write(b);
}
/**
* Flushes both streams.
*
* @throws IOException if an I/O error occurs.
*/
@Override
public void flush() throws IOException {
super.flush();
this.branch.flush();
}
/**
* Closes both output streams.
*
* If closing the main output stream throws an exception, attempt to close the branch output stream.
*
*
*
* If closing the main and branch output streams both throw exceptions, which exceptions is thrown by this method is
* currently unspecified and subject to change.
*
*
* @throws IOException if an I/O error occurs.
*/
@Override
public void close() throws IOException {
try {
super.close();
} finally {
this.branch.close();
}
}
}