com.gc.iotools.stream.writer.inspection
Class StatsWriter

java.lang.Object
  java.io.Writer
      com.gc.iotools.stream.writer.inspection.StatsWriter

All Implemented Interfaces:

Closeable, Flushable, Appendable

public class StatsWriter
extends Writer

A delegating Writer that gather statistics on the Writer passed in the constructor.

It can be used to read:

• The number of the characters written to the underlying character stream.
• The time spent writing the character.
• The bandwidth of the underlying stream.

Full statistics are available after the stream has been fully processed (by other parts of the application), or after invoking the method close() while partial statistics are available on the fly.

Since:

1.2.14

Version:

$Id: StatsWriter.java 527 2014-02-24 19:29:50Z gabriele.contini@gmail.com $

Author:

Gabriele Contini

Field Summary

Fields inherited from class java.io.Writer

lock

Constructor Summary

StatsWriter(Writer destination)
Creates a new StatsWriter with the given destination character stream.

Method Summary

void	close()
void	flush()
String	getBitRateString() Returns a string representation of the writing bit rate formatted with a convenient unit.
long	getSize() Returns the number of characters written until now.
long	getTime(TimeUnit tu) Returns the time spent waiting for the internal stream to write the data.
void	write(char[] b)
void	write(char[] b, int off, int len)
void	write(int b)

Methods inherited from class java.io.Writer

append, append, append, write, write

Methods inherited from class java.lang.Object

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

Constructor Detail

StatsWriter

public StatsWriter(Writer destination)

Creates a new StatsWriter with the given destination character stream.

Parameters:

destination - Destination stream where data are written.

Method Detail

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in class Writer

Throws:

IOException

flush

public void flush()
           throws IOException

Specified by:

flush in interface Flushable

Specified by:

flush in class Writer

Throws:

IOException

getBitRateString

public String getBitRateString()

Returns a string representation of the writing bit rate formatted with a convenient unit. The unit will change trying to keep not more than 3 digits.

Returns:

The characterRate of the stream.

getSize

public long getSize()

Returns the number of characters written until now.

Returns:

return the number of characters written until now.

getTime

public long getTime(TimeUnit tu)

Returns the time spent waiting for the internal stream to write the data.

Parameters:

tu - Unit to measure the time.

Returns:

time spent in waiting.

write

public void write(char[] b)
           throws IOException

Overrides:

write in class Writer

Throws:

IOException

write

public void write(char[] b,
                  int off,
                  int len)
           throws IOException

Specified by:

write in class Writer

Throws:

IOException

write

public void write(int b)
           throws IOException

Overrides:

write in class Writer

Throws:

IOException