org.rhq.enterprise.agent
Class AgentPrintWriter

java.lang.Object
  java.io.Writer
      java.io.PrintWriter
          org.rhq.enterprise.agent.AgentPrintWriter

All Implemented Interfaces:

Closeable, Flushable, Appendable

public class AgentPrintWriter
extends PrintWriter

Wrapper around PrintWriter that allows you to also divert the output to a listener. Since all print(), println(), and some write() type methods boil down to calls to the write() methods in PrintWriter, this method merely overrrides the appropriate write() methods so it can send the bytes being written to a listener, prior to actually writing the bytes to the underlying PrintWriter stream.

Author:

John Mazzitelli

Field Summary

Fields inherited from class java.io.PrintWriter

out

Fields inherited from class java.io.Writer

lock

Constructor Summary

AgentPrintWriter(FileWriter fileWriter, boolean b)

AgentPrintWriter(PrintStream out, boolean b)

Method Summary

void	addListener(Writer listener) Adds the given writer object as a listener to this print writer.
void	flush()
void	println()
void	removeListener(Writer listener) Removes the given listener from the list.
void	write(char[] buf, int off, int len)
void	write(int c)
void	write(String s, int off, int len)

Methods inherited from class java.io.PrintWriter

append, append, append, checkError, clearError, close, format, format, print, print, print, print, print, print, print, print, print, printf, printf, println, println, println, println, println, println, println, println, println, setError, write, write

Methods inherited from class java.lang.Object

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

Constructor Detail

AgentPrintWriter

public AgentPrintWriter(PrintStream out,
                        boolean b)

AgentPrintWriter

public AgentPrintWriter(FileWriter fileWriter,
                        boolean b)

Method Detail

addListener

public void addListener(Writer listener)

Adds the given writer object as a listener to this print writer. Anything written to this print writer is also written to this listener. You can have more than one listener. When done, you must remove the listener via removeListener(Writer).

Parameters:

listener - the writer to add as a listener

removeListener

public void removeListener(Writer listener)

Removes the given listener from the list. If the listener was not listening to this agent print writer object, this method does nothing and returns normally. This method will never attempt to close the writer.

Parameters:

listener - the listener to remove

write

public void write(char[] buf,
                  int off,
                  int len)

Overrides:

write in class PrintWriter

write

public void write(int c)

Overrides:

write in class PrintWriter

write

public void write(String s,
                  int off,
                  int len)

Overrides:

write in class PrintWriter

println

public void println()

Overrides:

println in class PrintWriter

flush

public void flush()

Specified by:

flush in interface Flushable

Overrides:

flush in class PrintWriter