org.jgroups.util.SuppressLog Maven / Gradle / Ivy
package org.jgroups.util;
import org.jgroups.logging.Log;
/**
* Log (using {@link SuppressCache}) which suppresses (certain) messages from the same member for a given time
* @author Bela Ban
* @since 3.2
*/
public class SuppressLog {
protected final Log log;
protected final SuppressCache cache;
protected final String message_format;
protected final String suppress_format;
public static enum Level {error,warn,trace};
public SuppressLog(Log log, String message_key, String suppress_msg) {
this.log=log;
cache=new SuppressCache<>();
message_format=Util.getMessage(message_key);
suppress_format=Util.getMessage(suppress_msg); // "(received {3} identical messages from {2} in the last {4} ms)"
}
public SuppressCache getCache() {return cache;}
/**
* Logs a message from a given member if is hasn't been logged for timeout ms
* @param level The level, either warn or error
* @param key The key into the SuppressCache
* @param timeout The timeout
* @param args The arguments to the message key
*/
public void log(Level level, T key, long timeout, Object ... args) {
SuppressCache.Value val=cache.putIfAbsent(key, timeout);
if(val == null) // key is present and hasn't expired
return;
String message=val.count() == 1? String.format(message_format, args) :
String.format(message_format, args) + " " + String.format(suppress_format, val.count(), key, val.age());
switch(level) {
case error:
log.error(message);
break;
case warn:
log.warn(message);
break;
case trace:
log.trace(message);
break;
}
}
public void removeExpired(long timeout) {cache.removeExpired(timeout);}
}