org.springframework.util.exec.StreamPumper Maven / Gradle / Ivy
/*
* Copyright 2002-2013 the original author or authors.
*
* Licensed 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.springframework.util.exec;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* Copies all data from an input stream to an output stream.
*
* @author [email protected]
*/
public class StreamPumper implements Runnable {
// TODO: make SIZE and SLEEP instance variables.
// TODO: add a status flag to note if an error occured in run.
private static final int SLEEP = 5;
private static final int SIZE = 128;
private InputStream is;
private OutputStream os;
/**
* Create a new stream pumper.
*
* @param is input stream to read data from
* @param os output stream to write data to.
*/
public StreamPumper(InputStream is, OutputStream os) {
this.is = is;
this.os = os;
}
/**
* Copies data from the input stream to the output stream.
*
* Terminates as soon as the input stream is closed or an error occurs.
*/
public void run() {
final byte[] buf = new byte[SIZE];
int length;
try {
while ((length = is.read(buf)) > 0) {
os.write(buf, 0, length);
try {
Thread.sleep(SLEEP);
} catch (InterruptedException e) {}
}
} catch(IOException e) {}
}
}