SystemLogHandler (Apache Tomcat 8.0.53 API Documentation)

java.lang.Object
- java.io.OutputStream
- - java.io.FilterOutputStream
  - - java.io.PrintStream
    - - org.apache.tomcat.util.log.SystemLogHandler

All Implemented Interfaces:

java.io.Closeable, java.io.Flushable, java.lang.Appendable, java.lang.AutoCloseable
```
public class SystemLogHandler
extends java.io.PrintStream
```
This helper class may be used to do sophisticated redirection of System.out and System.err on a per Thread basis. A stack is implemented per Thread so that nested startCapture and stopCapture can be used.

Author:

Remy Maucherat, Glenn L. Nielsen

Constructor Summary

Constructors
Constructor and Description

SystemLogHandler(java.io.PrintStream wrapped)
Construct the handler to capture the output of the given steam.

Constructors
Constructor and Description
`SystemLogHandler(java.io.PrintStream wrapped)` Construct the handler to capture the output of the given steam.

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`checkError()`
`void`	`close()`
`protected java.io.PrintStream`	`findStream()` Find PrintStream to which the output must be written to.
`void`	`flush()`
`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(java.lang.Object obj)`
`void`	`print(java.lang.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(java.lang.Object x)`
`void`	`println(java.lang.String x)`
`protected void`	`setError()`
`static void`	`startCapture()` Start capturing thread's output.
`static java.lang.String`	`stopCapture()` 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.io.PrintStream
append, append, append, clearError, format, format, printf, printf

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SystemLogHandler
```
public SystemLogHandler(java.io.PrintStream wrapped)
```
    Construct the handler to capture the output of the given steam.
- Method Detail
  - startCapture
```
public static void startCapture()
```
    Start capturing thread's output.
  - stopCapture
```
public static java.lang.String stopCapture()
```
    Stop capturing thread's output and return captured data as a String.
  - findStream
```
protected java.io.PrintStream findStream()
```
    Find PrintStream to which the output must be written to.
  - flush
```
public void flush()
```
    Specified by:
    
    flush in interface java.io.Flushable
    
    Overrides:
    
    flush in class java.io.PrintStream
  - close
```
public void close()
```
    Specified by:
    
    close in interface java.io.Closeable
    
    Specified by:
    
    close in interface java.lang.AutoCloseable
    
    Overrides:
    
    close in class java.io.PrintStream
  - checkError
```
public boolean checkError()
```
    Overrides:
    
    checkError in class java.io.PrintStream
  - setError
```
protected void setError()
```
    Overrides:
    
    setError in class java.io.PrintStream
  - write
```
public void write(int b)
```
    Overrides:
    
    write in class java.io.PrintStream
  - write
```
public void write(byte[] b)
           throws java.io.IOException
```
    Overrides:
    
    write in class java.io.FilterOutputStream
    
    Throws:
    
    java.io.IOException
  - write
```
public void write(byte[] buf,
         int off,
         int len)
```
    Overrides:
    
    write in class java.io.PrintStream
  - print
```
public void print(boolean b)
```
    Overrides:
    
    print in class java.io.PrintStream
  - print
```
public void print(char c)
```
    Overrides:
    
    print in class java.io.PrintStream
  - print
```
public void print(int i)
```
    Overrides:
    
    print in class java.io.PrintStream
  - print
```
public void print(long l)
```
    Overrides:
    
    print in class java.io.PrintStream
  - print
```
public void print(float f)
```
    Overrides:
    
    print in class java.io.PrintStream
  - print
```
public void print(double d)
```
    Overrides:
    
    print in class java.io.PrintStream
  - print
```
public void print(char[] s)
```
    Overrides:
    
    print in class java.io.PrintStream
  - print
```
public void print(java.lang.String s)
```
    Overrides:
    
    print in class java.io.PrintStream
  - print
```
public void print(java.lang.Object obj)
```
    Overrides:
    
    print in class java.io.PrintStream
  - println
```
public void println()
```
    Overrides:
    
    println in class java.io.PrintStream
  - println
```
public void println(boolean x)
```
    Overrides:
    
    println in class java.io.PrintStream
  - println
```
public void println(char x)
```
    Overrides:
    
    println in class java.io.PrintStream
  - println
```
public void println(int x)
```
    Overrides:
    
    println in class java.io.PrintStream
  - println
```
public void println(long x)
```
    Overrides:
    
    println in class java.io.PrintStream
  - println
```
public void println(float x)
```
    Overrides:
    
    println in class java.io.PrintStream
  - println
```
public void println(double x)
```
    Overrides:
    
    println in class java.io.PrintStream
  - println
```
public void println(char[] x)
```
    Overrides:
    
    println in class java.io.PrintStream
  - println
```
public void println(java.lang.String x)
```
    Overrides:
    
    println in class java.io.PrintStream
  - println
```
public void println(java.lang.Object x)
```
    Overrides:
    
    println in class java.io.PrintStream

Class SystemLogHandler

Constructor Summary

Method Summary

Methods inherited from class java.io.PrintStream

Methods inherited from class java.lang.Object

Constructor Detail

SystemLogHandler

Method Detail

startCapture

stopCapture

findStream

flush

close

checkError

setError

write

write

write

print

print

print

print

print

print

print

print

print

println

println

println

println

println

println

println

println

println

println