Package com.openindex.openestate.tool.utils

Class LoggingOutputStream

java.lang.Object

java.io.OutputStream

com.openindex.openestate.tool.utils.LoggingOutputStream

All Implemented Interfaces:

Closeable, Flushable, AutoCloseable

public class LoggingOutputStream
extends OutputStream

An OutputStream that flushes out to a Logger.

Note that no data is written out to the Logger until the stream is flushed or closed.

Example:

 // make sure everything sent to System.err is logged
 System.setErr(new PrintStream(new LoggingOutputStream(LoggerFactory.getLogger(this.getClass()), Priority.WARN), true));

 // make sure everything sent to System.out is also logged
 System.setOut(new PrintStream(new LoggingOutputStream(LoggerFactory.getLogger(this.getClass()), Priority.INFO), true));
 

Author:

Jim Moore <Jim.Moore@rocketmail.com>, Andreas Rudolph

See Also:

Logger

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	LoggingOutputStream.Priority

Field Summary

Fields

Modifier and Type	Field	Description
protected byte[]	buf	The internal buffer where data is stored.
protected int	count	The number of valid bytes in the buffer.
static int	DEFAULT_BUFFER_LENGTH	The default number of bytes in the buffer.
protected boolean	hasBeenClosed	Used to maintain the contract of close().
protected static String	LINE_SEPARATOR
protected org.slf4j.Logger	logger	The logger to write to.
protected String	prefix
protected LoggingOutputStream.Priority	priority	The priority to use when writing to the Logger.

Constructor Summary

Constructors

Constructor	Description
LoggingOutputStream(org.slf4j.Logger logger, LoggingOutputStream.Priority priority)	Creates the LoggingOutputStream to flush to the given Logger.
LoggingOutputStream(org.slf4j.Logger logger, LoggingOutputStream.Priority priority, String prefix)	Creates the LoggingOutputStream to flush to the given Logger.

Method Summary

Modifier and Type	Method	Description
void	close()	Closes this output stream and releases any system resources associated with this stream.
void	flush()	Flushes this output stream and forces any buffered output bytes to be written out.
void	write(int b)	Writes the specified byte to this output stream.

Methods inherited from class java.io.OutputStream

nullOutputStream, write, write

Methods inherited from class java.lang.Object

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

Field Detail

LINE_SEPARATOR

protected static final String LINE_SEPARATOR

hasBeenClosed

protected boolean hasBeenClosed

Used to maintain the contract of close().

buf

protected byte[] buf

The internal buffer where data is stored.

count

protected int count

The number of valid bytes in the buffer. This value is always in the range 0 through buf.length; elements buf[0] through buf[count-1] contain valid byte data.

DEFAULT_BUFFER_LENGTH

public static final int DEFAULT_BUFFER_LENGTH

The default number of bytes in the buffer. =2048

See Also:

Constant Field Values

logger

protected org.slf4j.Logger logger

The logger to write to.

priority

protected LoggingOutputStream.Priority priority

The priority to use when writing to the Logger.

prefix

protected String prefix

Constructor Detail

LoggingOutputStream

public LoggingOutputStream(org.slf4j.Logger logger,
                           LoggingOutputStream.Priority priority)
                    throws IllegalArgumentException

Creates the LoggingOutputStream to flush to the given Logger.

Parameters:

logger - the Logger to write to

priority - the Priority to use when writing to the Logger

Throws:

IllegalArgumentException - if logger == null or priority == null

LoggingOutputStream

public LoggingOutputStream(org.slf4j.Logger logger,
                           LoggingOutputStream.Priority priority,
                           String prefix)
                    throws IllegalArgumentException

Creates the LoggingOutputStream to flush to the given Logger.

Parameters:

logger - the Logger to write to

priority - the Priority to use when writing to the Logger

prefix - the prefix is written before any new log line, maybe null

Throws:

IllegalArgumentException - if logger == null or priority == null

Method Detail

close

public void close()

Closes this output stream and releases any system resources associated with this stream. The general contract of close is that it closes the output stream. A closed stream cannot perform output operations and cannot be reopened.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Overrides:

close in class OutputStream

write

public void write(int b)
           throws IOException

Writes the specified byte to this output stream. The general contract for write is that one byte is written to the output stream. The byte to be written is the eight low-order bits of the argument b. The 24 high-order bits of b are ignored.

Specified by:

write in class OutputStream

Parameters:

b - the byte to write

Throws:

IOException - if an I/O error occurs. In particular, an IOException may be thrown if the output stream has been closed.

flush

public void flush()

Flushes this output stream and forces any buffered output bytes to be written out. The general contract of flush is that calling it is an indication that, if any bytes previously written have been buffered by the implementation of the output stream, such bytes should immediately be written to their intended destination.

Specified by:

flush in interface Flushable

Overrides:

flush in class OutputStream