org.apache.tools.ant.taskdefs

Class StreamPumper

java.lang.Object

org.apache.tools.ant.taskdefs.StreamPumper

All Implemented Interfaces:

Runnable

public class StreamPumper
extends Object
implements Runnable

Copies all data from an input stream to an output stream.

Since:

Ant 1.2

Constructor Summary

Constructors

Constructor and Description
StreamPumper(InputStream is, OutputStream os) Create a new StreamPumper.
StreamPumper(InputStream is, OutputStream os, boolean closeWhenExhausted) Create a new StreamPumper.
StreamPumper(InputStream is, OutputStream os, boolean closeWhenExhausted, boolean useAvailable) Create a new StreamPumper.

Method Summary

Modifier and Type	Method and Description
int	getBufferSize() Get the size in bytes of the read buffer.
Exception	getException() Get the exception encountered, if any.
boolean	isFinished() Tells whether the end of the stream has been reached.
void	run() Copies data from the input stream to the output stream.
void	setBufferSize(int bufferSize) Set the size in bytes of the read buffer.
void	waitFor() This method blocks until the StreamPumper finishes.

Methods inherited from class java.lang.Object

clone, equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StreamPumper

public StreamPumper(InputStream is,
                    OutputStream os)

Create a new StreamPumper.

Parameters:

is - input stream to read data from

os - output stream to write data to.

StreamPumper

public StreamPumper(InputStream is,
                    OutputStream os,
                    boolean closeWhenExhausted)

Create a new StreamPumper.

Parameters:

is - input stream to read data from

os - output stream to write data to.

closeWhenExhausted - if true, the output stream will be closed when the input is exhausted.

StreamPumper

public StreamPumper(InputStream is,
                    OutputStream os,
                    boolean closeWhenExhausted,
                    boolean useAvailable)

Create a new StreamPumper.

Note: If you set useAvailable to true, you must explicitly invoke stop or interrupt the corresponding Thread when you are done or the run method will never finish on some JVMs (namely those where available returns 0 on a closed stream). Setting it to true may also impact performance negatively. This flag should only be set to true if you intend to stop the pumper before the input stream gets closed.

Parameters:

is - input stream to read data from

os - output stream to write data to.

closeWhenExhausted - if true, the output stream will be closed when the input is exhausted.

useAvailable - whether the pumper should use available to determine whether input is ready, thus trying to emulate non-blocking behavior.

Since:

Ant 1.8.0

Method Detail

getBufferSize

public int getBufferSize()

Get the size in bytes of the read buffer.

Returns:

the int size of the read buffer.

getException

public Exception getException()

Get the exception encountered, if any.

Returns:

the Exception encountered.

isFinished

public boolean isFinished()

Tells whether the end of the stream has been reached.

Returns:

true is the stream has been exhausted.

run

public void run()

Copies data from the input stream to the output stream. Terminates as soon as the input stream is closed or an error occurs.

Specified by:

run in interface Runnable

See Also:

Thread.run()

setBufferSize

public void setBufferSize(int bufferSize)

Set the size in bytes of the read buffer.

Parameters:

bufferSize - the buffer size to use.

Throws:

IllegalStateException - if the StreamPumper is already running.

waitFor

public void waitFor()
             throws InterruptedException

This method blocks until the StreamPumper finishes.

Throws:

InterruptedException - if interrupted.

See Also:

isFinished()