Class SystemMonitor

java.lang.Object

org.jpos.util.SystemMonitor

All Implemented Interfaces:

Runnable, Loggeable, LogSource

public class SystemMonitor
extends Object
implements Runnable, LogSource, Loggeable

Periodically dumps Thread and memory usage

See Also:

• Logger

Constructor Summary

Constructors

Constructor	Description
SystemMonitor()	noargs constructor
SystemMonitor(int sleepTime, Logger logger, String realm)	Constructs a monitor with the given polling interval and logger binding.

Method Summary

Modifier and Type	Method	Description
void	dump(PrintStream p, String indent)	Dumps a human-readable representation of this object to the print stream.
Logger	getLogger()	Returns the Logger associated with this source.
String	getRealm()	Returns the log realm associated with this source.
void	run()
void	setLogger(Logger logger, String realm)	Attaches a Logger and realm to this log source.
void	setSleepTime(int sleepTime)	Sets the polling interval and (re)starts the monitor thread.
void	showThreadGroup(ThreadGroup g, PrintStream p, String indent)	Recursively dumps g and every parent thread group, with their threads.
void	shutdown()	Signals the monitor's run loop to terminate.

Methods inherited from class Object

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

Methods inherited from interface Loggeable

dump

Modifier and Type	Method	Description
default void	dump(PrintStream p, String indent, LogRenderer.Type type)	Dumps a representation of this object using the specified renderer type.

Constructor Details

SystemMonitor

public SystemMonitor()

noargs constructor

SystemMonitor

public SystemMonitor(int sleepTime,
 Logger logger,
 String realm)

Constructs a monitor with the given polling interval and logger binding.

Parameters:

sleepTime - sleep

logger - current logger

realm - instance realm

Method Details

setSleepTime

public void setSleepTime(int sleepTime)

Sets the polling interval and (re)starts the monitor thread.

Parameters:

sleepTime - new sleepTime;

showThreadGroup

public void showThreadGroup(ThreadGroup g,
 PrintStream p,
 String indent)

Recursively dumps g and every parent thread group, with their threads.

Parameters:

g - starting thread group

p - destination stream

indent - prefix used for indentation

run

public void run()

Specified by:

run in interface Runnable

shutdown

public void shutdown()

Signals the monitor's run loop to terminate.

dump

public void dump(PrintStream p,
 String indent)

Description copied from interface: Loggeable

Dumps a human-readable representation of this object to the print stream.

Specified by:

dump in interface Loggeable

Parameters:

p - the output stream

indent - indentation prefix

setLogger

public void setLogger(Logger logger,
 String realm)

Description copied from interface: LogSource

Attaches a Logger and realm to this log source.

Specified by:

setLogger in interface LogSource

Parameters:

logger - the logger to use

realm - the log realm (diagnostic label)

getRealm

public String getRealm()

Description copied from interface: LogSource

Returns the log realm associated with this source.

Specified by:

getRealm in interface LogSource

Returns:

log realm

getLogger

public Logger getLogger()

Description copied from interface: LogSource

Returns the Logger associated with this source.

Specified by:

getLogger in interface LogSource

Returns:

the Logger