compact1, compact2, compact3

java.util.logging

Class StreamHandler

java.lang.Object

java.util.logging.Handler

java.util.logging.StreamHandler

Direct Known Subclasses:

ConsoleHandler, FileHandler, SocketHandler

public class StreamHandler
extends Handler

Stream based logging Handler.

This is primarily intended as a base class or support class to be used in implementing other logging Handlers.

LogRecords are published to a given java.io.OutputStream.

Configuration: By default each StreamHandler is initialized using the following LogManager configuration properties where <handler-name> refers to the fully-qualified class name of the handler. If properties are not defined (or have invalid values) then the specified default values are used.

• <handler-name>.level specifies the default level for the Handler (defaults to Level.INFO).
• <handler-name>.filter specifies the name of a Filter class to use (defaults to no Filter).
• <handler-name>.formatter specifies the name of a Formatter class to use (defaults to java.util.logging.SimpleFormatter).
• <handler-name>.encoding the name of the character set encoding to use (defaults to the default platform encoding).

For example, the properties for StreamHandler would be:

• java.util.logging.StreamHandler.level=INFO
• java.util.logging.StreamHandler.formatter=java.util.logging.SimpleFormatter

For a custom handler, e.g. com.foo.MyHandler, the properties would be:

• com.foo.MyHandler.level=INFO
• com.foo.MyHandler.formatter=java.util.logging.SimpleFormatter

Since:

1.4

Constructor Summary

Constructors

Constructor	Description
StreamHandler()	Create a StreamHandler, with no current output stream.
StreamHandler(OutputStream out, Formatter formatter)	Create a StreamHandler with a given Formatter and output stream.

Method Summary

Modifier and Type	Method	Description
void	close()	Close the current output stream.
void	flush()	Flush any buffered messages.
boolean	isLoggable(LogRecord record)	Check if this Handler would actually log a given LogRecord.
void	publish(LogRecord record)	Format and publish a LogRecord.
void	setEncoding(String encoding)	Set (or change) the character encoding used by this Handler.
protected void	setOutputStream(OutputStream out)	Change the output stream.

Methods inherited from class java.util.logging.Handler

getEncoding, getErrorManager, getFilter, getFormatter, getLevel, reportError, setErrorManager, setFilter, setFormatter, setLevel

Methods inherited from class java.lang.Object

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

Constructor Detail

StreamHandler

public StreamHandler()

Create a StreamHandler, with no current output stream.

StreamHandler

public StreamHandler(OutputStream out,
                     Formatter formatter)

Create a StreamHandler with a given Formatter and output stream.

Parameters:

out - the target output stream

formatter - Formatter to be used to format output

Method Detail

setOutputStream

protected void setOutputStream(OutputStream out)
                        throws SecurityException

Change the output stream.

If there is a current output stream then the Formatter's tail string is written and the stream is flushed and closed. Then the output stream is replaced with the new output stream.

Parameters:

out - New output stream. May not be null.

Throws:

SecurityException - if a security manager exists and if the caller does not have LoggingPermission("control").

setEncoding

public void setEncoding(String encoding)
                 throws SecurityException,
                        UnsupportedEncodingException

Set (or change) the character encoding used by this Handler.

The encoding should be set before any LogRecords are written to the Handler.

Overrides: