/*
Copyright 2004-2012, Martian Software, Inc.
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 com.martiansoftware.nailgun;
import java.io.
IOException;
import java.io.
PrintStream;
/**
* The class name is pretty descriptive. This creates a PrintStream
* much like a FilterOutputStream, but with the wrapped PrintStream
* being local to the current Thread. By setting System.out to a
* ThreadLocalPrintStream, different Threads can write to different
* PrintStreams simply by using System.out. Of course, the init()
* method must be called by the Thread that wishes to use the
* wrapped stream.
*
* @author <a href="http://www.martiansoftware.com/contact.html">Marty Lamb</a>
*/
class
ThreadLocalPrintStream extends
PrintStream {
/**
* The PrintStreams for the various threads
*/
private
InheritableThreadLocal streams = null;
private
PrintStream defaultPrintStream = null;
/**
* Creates a new InheritedThreadLocalPrintStream
* @param defaultPrintStream the PrintStream that will be used if the
* current thread has not called init()
*/
public
ThreadLocalPrintStream(
PrintStream defaultPrintStream) {
super(
defaultPrintStream);
streams = new
InheritableThreadLocal();
this.
defaultPrintStream =
defaultPrintStream;
init(null);
}
/**
* Sets the PrintStream for the current thread
* @param streamForCurrentThread the PrintStream for the current thread
*/
void
init(
PrintStream streamForCurrentThread) {
streams.
set(
streamForCurrentThread);
}
/**
* Returns this thread's PrintStream
* @return this thread's PrintStream
*/
PrintStream getPrintStream() {
PrintStream result = (
PrintStream)
streams.
get();
return ((
result == null) ?
defaultPrintStream :
result);
}
// BEGIN delegated java.io.PrintStream methods
/**
* @see java.io.PrintStream#checkError()
*/
public boolean
checkError() {
return (
getPrintStream().
checkError());
}
/**
* @see java.io.PrintStream#close()
*/
public void
close() {
getPrintStream().
close();
}
/**
* @see java.io.PrintStream#flush()
*/
public void
flush() {
getPrintStream().
flush();
}
/**
* @see java.io.PrintStream#print(boolean)
*/
public void
print(boolean
b) {
getPrintStream().
print(
b);
}
/**
* @see java.io.PrintStream#print(char)
*/
public void
print(char
c) {
getPrintStream().
print(
c);
}
/**
* @see java.io.PrintStream#print(char[])
*/
public void
print(char[]
s) {
getPrintStream().
print(
s);
}
/**
* @see java.io.PrintStream#print(double)
*/
public void
print(double
d) {
getPrintStream().
print(
d);
}
/**
* @see java.io.PrintStream#print(float)
*/
public void
print(float
f) {
getPrintStream().
print(
f);
}
/**
* @see java.io.PrintStream#print(int)
*/
public void
print(int
i) {
getPrintStream().
print(
i);
}
/**
* @see java.io.PrintStream#print(long)
*/
public void
print(long
l) {
getPrintStream().
print(
l);
}
/**
* @see java.io.PrintStream#print(Object)
*/
public void
print(
Object obj) {
getPrintStream().
print(
obj);
}
/**
* @see java.io.PrintStream#print(String)
*/
public void
print(
String s) {
getPrintStream().
print(
s);
}
/**
* @see java.io.PrintStream#println()
*/
public void
println() {
getPrintStream().
println();
}
/**
* @see java.io.PrintStream#println(boolean)
*/
public void
println(boolean
x) {
getPrintStream().
println(
x);
}
/**
* @see java.io.PrintStream#println(char)
*/
public void
println(char
x) {
getPrintStream().
println(
x);
}
/**
* @see java.io.PrintStream#println(char[])
*/
public void
println(char[]
x) {
getPrintStream().
println(
x);
}
/**
* @see java.io.PrintStream#println(double)
*/
public void
println(double
x) {
getPrintStream().
println(
x);
}
/**
* @see java.io.PrintStream#println(float)
*/
public void
println(float
x) {
getPrintStream().
println(
x);
}
/**
* @see java.io.PrintStream#println(int)
*/
public void
println(int
x) {
getPrintStream().
println(
x);
}
/**
* @see java.io.PrintStream#println(long)
*/
public void
println(long
x) {
getPrintStream().
println(
x);
}
/**
* @see java.io.PrintStream#println(Object)
*/
public void
println(
Object x) {
getPrintStream().
println(
x);
}
/**
* @see java.io.PrintStream#println(String)
*/
public void
println(
String x) {
getPrintStream().
println(
x);
}
/**
* @see java.io.PrintStream#write(byte[],int,int)
*/
public void
write(byte[]
buf, int
off, int
len) {
getPrintStream().
write(
buf,
off,
len);
}
/**
* @see java.io.PrintStream#write(int)
*/
public void
write(int
b) {
getPrintStream().
write(
b);
}
// END delegated java.io.PrintStream methods
// BEGIN delegated java.io.FilterOutputStream methods
/**
* @see java.io.FilterOutputStream#write(byte[])
*/
public void
write(byte[]
b) throws
IOException {
getPrintStream().
write(
b);
}
// END delegated java.io.FilterOutputStream methods
// Note: Should java.lang.Object methods be delegated? If not, and
// someone synchronizes on this stream, processes might be blocked
// that shouldn't be. It would certainly be stupid to delegate
// finalize(). Not so clear are hashcode(), equals(), notify(), and
// the wait() methods.
}