Package org.apache.jasper.util

Class SystemLogHandler

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

java.io.PrintStream

org.apache.jasper.util.SystemLogHandler

All Implemented Interfaces:

Closeable, Flushable, Appendable, AutoCloseable

public class SystemLogHandler
extends PrintStream

This helper class may be used to do sophisticated redirection of System.out and System.err.

Author:

Remy Maucherat

Field Summary

Fields

Modifier and Type	Field	Description
protected static ThreadLocal	data	Thread <-> ByteArrayOutputStream associations.
protected static ThreadLocal	streams	Thread <-> PrintStream associations.
protected PrintStream	wrapped	Wrapped PrintStream.

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor	Description
SystemLogHandler(PrintStream wrapped)	Construct the handler to capture the output of the given steam.

Method Summary

Modifier and Type	Method	Description
boolean	checkError()
void	close()
protected PrintStream	findStream()	Find PrintStream to which the output must be written to.
void	flush()
PrintStream	getWrapped()
void	print(boolean b)
void	print(char c)
void	print(char[] s)
void	print(double d)
void	print(float f)
void	print(int i)
void	print(long l)
void	print(Object obj)
void	print(String s)
void	println()
void	println(boolean x)
void	println(char x)
void	println(char[] x)
void	println(double x)
void	println(float x)
void	println(int x)
void	println(long x)
void	println(Object x)
void	println(String x)
protected void	setError()
static void	setThread()	Start capturing thread's output.
static String	unsetThread()	Stop capturing thread's output and return captured data as a String.
void	write(byte[] b)
void	write(byte[] buf, int off, int len)
void	write(int b)

Methods inherited from class java.lang.Object

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

Methods inherited from class java.io.PrintStream

append, append, append, clearError, format, format, printf, printf

Field Detail

wrapped

protected PrintStream wrapped

Wrapped PrintStream.

streams

protected static final ThreadLocal streams

Thread <-> PrintStream associations.

data

protected static final ThreadLocal data

Thread <-> ByteArrayOutputStream associations.

Constructor Detail

SystemLogHandler

public SystemLogHandler(PrintStream wrapped)

Construct the handler to capture the output of the given steam.

Method Detail

getWrapped

public PrintStream getWrapped()

setThread

public static void setThread()

Start capturing thread's output.

unsetThread

public static String unsetThread()

Stop capturing thread's output and return captured data as a String.

findStream

protected PrintStream findStream()

Find PrintStream to which the output must be written to.

flush

public void flush()

Specified by:

flush in interface Flushable

Overrides:

flush in class PrintStream

close

public void close()

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class PrintStream

checkError

public boolean checkError()

Overrides:

checkError in class PrintStream

setError

protected void setError()

Overrides:

setError in class PrintStream

write

public void write(int b)

Overrides:

write in class PrintStream

write

public void write(byte[] b)
           throws IOException

Overrides:

write in class FilterOutputStream

Throws:

IOException

write

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

Overrides:

write in class PrintStream

print

public void print(boolean b)

Overrides:

print in class PrintStream

print

public void print(char c)

Overrides:

print in class PrintStream

print

public void print(int i)

Overrides:

print in class PrintStream

print

public void print(long l)

Overrides:

print in class PrintStream

print

public void print(float f)

Overrides:

print in class PrintStream

print

public void print(double d)

Overrides:

print in class PrintStream

print

public void print(char[] s)

Overrides:

print in class PrintStream

print

public void print(String s)

Overrides:

print in class PrintStream

print

public void print(Object obj)

Overrides:

print in class PrintStream

println

public void println()

Overrides:

println in class PrintStream

println

public void println(boolean x)

Overrides:

println in class PrintStream

println

public void println(char x)

Overrides:

println in class PrintStream

println

public void println(int x)

Overrides:

println in class PrintStream

println

public void println(long x)

Overrides:

println in class PrintStream

println

public void println(float x)

Overrides:

println in class PrintStream

println

public void println(double x)

Overrides:

println in class PrintStream

println

public void println(char[] x)

Overrides:

println in class PrintStream

println

public void println(String x)

Overrides:

println in class PrintStream

println

public void println(Object x)

Overrides:

println in class PrintStream