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package com.ericsson.ssa.config.event;
import com.ericsson.ssa.config.ConfigRuntimeException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import org.jvnet.glassfish.comms.util.LogUtil;
import java.util.logging.Logger;
/**
*
* @author ELNELBO
*/
public class ConfigEventMulticaster implements ConfigEventRegistry {
private final Logger log = LogUtil.SIP_LOGGER.getLogger();
protected Map<ConfigChangeListener, List<String>> registry = new HashMap<ConfigChangeListener, List<String>>();
/**
* Creates a new instance of ConfigEventMulticaster
*/
public ConfigEventMulticaster() {
}
public synchronized void registerConfigChangeListener(String nodePattern,
ConfigChangeListener listener) {
if (registry.containsKey(listener)) {
List<String> patterns = registry.get(listener);
patterns.add(nodePattern);
registry.put(listener, patterns);
} else {
List<String> patterns = new ArrayList<String>(1);
patterns.add(nodePattern);
registry.put(listener, patterns);
}
}
public synchronized void deregisterConfigChangeListener(ConfigChangeListener listener) {
registry.remove(listener);
}
public void processEvent(ConfigEvent event) {
Map<ConfigChangeListener, List<String>> registryClone = null;
synchronized(registry) {
registryClone = new HashMap<ConfigChangeListener, List<String>>(registry);
}
ConfigRuntimeException troubles = null;
for (Map.Entry<ConfigChangeListener, List<String>> entry : registryClone.entrySet()) {
for (String pattern : entry.getValue()) {
if (match(pattern, event)) {
if (log.isLoggable(Level.FINE)) {
log.log(Level.FINE, "processEvent match :) for " +
event.getClass().getName() + " with " + pattern +
" and " + event.getNode());
}
try {
if (event instanceof ConfigAddEvent) {
entry.getKey().handleConfigEvent((ConfigAddEvent) event);
}
if (event instanceof ConfigUpdateEvent) {
entry.getKey().handleConfigEvent((ConfigUpdateEvent) event);
}
if (event instanceof ConfigRemoveEvent) {
entry.getKey().handleConfigEvent((ConfigRemoveEvent) event);
}
} catch(Exception e) {
//This catch may be to wide!
//Each listener gets the opertunaty to handle the event.
//It lokalizes the effect of troublesome listeners.
if (troubles==null) {
troubles = new ConfigRuntimeException("Muticasting event ["+
event.getNode()+"] failed for atleast one listener");
}
troubles.addCause(e);
}
} else {
if (log.isLoggable(Level.FINEST)) {
log.log(Level.FINEST, "processEvent no match :( for " +
event.getClass().getName() + " with " + pattern +
" and " + event.getNode());
}
}
}
}
if (troubles!=null) {
throw troubles;
}
}
protected boolean match(String nodePattern, ConfigEvent event) {
return event.getNode().matches(nodePattern);
}
}