com.wavefront.sdk.common.logging

Class MessageDedupingLogger

java.lang.Object

java.util.logging.Logger

com.wavefront.sdk.common.logging.DelegatingLogger

com.wavefront.sdk.common.logging.MessageDedupingLogger

public class MessageDedupingLogger
extends DelegatingLogger

A logger that suppresses identical messages for a specified period of time.

Author:

Han Zhang (zhanghan@vmware.com)

Field Summary

Fields inherited from class com.wavefront.sdk.common.logging.DelegatingLogger

delegate

Fields inherited from class java.util.logging.Logger

global, GLOBAL_LOGGER_NAME

Constructor Summary

Constructors

Constructor and Description
MessageDedupingLogger(Logger delegate, long maximumSize, double rateLimit)

Method Summary

Modifier and Type	Method and Description
void	log(Level level, String message)
void	log(String messageDedupingKey, Level level, String message) Log a message, de-duplicating with the specified key.
void	log(String messageDedupingKey, Level level, String message, Throwable thrown) Log a message, de-duplicating with the specified key.

Methods inherited from class com.wavefront.sdk.common.logging.DelegatingLogger

log

Methods inherited from class java.util.logging.Logger

addHandler, config, config, entering, entering, entering, exiting, exiting, fine, fine, finer, finer, finest, finest, getAnonymousLogger, getAnonymousLogger, getFilter, getGlobal, getHandlers, getLevel, getLogger, getLogger, getName, getParent, getResourceBundle, getResourceBundleName, getUseParentHandlers, info, info, isLoggable, log, log, log, log, log, logp, logp, logp, logp, logp, logp, logrb, logrb, logrb, logrb, logrb, logrb, removeHandler, setFilter, setLevel, setParent, setResourceBundle, setUseParentHandlers, severe, severe, throwing, warning, warning

Methods inherited from class java.lang.Object

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

Constructor Detail

MessageDedupingLogger

public MessageDedupingLogger(Logger delegate,
                             long maximumSize,
                             double rateLimit)

Parameters:

delegate - Delegate logger.

maximumSize - max number of unique messages that can exist in the cache

rateLimit - rate limit (per second per each unique message)

Method Detail

log

public void log(Level level,
                String message)

Specified by:

log in class DelegatingLogger

Parameters:

level - log level.

message - string to write to log.

log

public void log(String messageDedupingKey,
                Level level,
                String message)

Log a message, de-duplicating with the specified key.

Parameters:

messageDedupingKey - String to dedupe the log by.

level - Log level.

message - String to write to log.

log

public void log(String messageDedupingKey,
                Level level,
                String message,
                Throwable thrown)

Log a message, de-duplicating with the specified key.

Parameters:

messageDedupingKey - String to dedupe the log by.

level - Log level.

message - String to write to log.

thrown - Throwable associated with log message.