| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more contributor license |
| * agreements. See the NOTICE file distributed with this work for additional information regarding |
| * copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the License. You may obtain a |
| * copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software distributed under the License |
| * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express |
| * or implied. See the License for the specific language governing permissions and limitations under |
| * the License. |
| */ |
| package org.apache.geode.alerting.internal; |
| |
| import java.time.Instant; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| import java.util.concurrent.atomic.AtomicReference; |
| |
| import org.apache.logging.log4j.LogManager; |
| import org.apache.logging.log4j.Logger; |
| |
| import org.apache.geode.alerting.internal.spi.AlertLevel; |
| import org.apache.geode.annotations.VisibleForTesting; |
| import org.apache.geode.distributed.DistributedMember; |
| |
| public class ClusterAlertingService implements InternalAlertingService { |
| |
| private static final Logger logger = LogManager.getLogger(); |
| |
| // Listeners are ordered with the narrowest levels (e.g. FATAL) at the end |
| private final CopyOnWriteArrayList<AlertListener> listeners = new CopyOnWriteArrayList<>(); |
| |
| private final AtomicReference<AlertMessaging> alertMessagingRef = |
| new AtomicReference<>(new NullAlertMessaging()); |
| |
| public ClusterAlertingService() { |
| // nothing |
| } |
| |
| @Override |
| public void useAlertMessaging(AlertMessaging alertMessaging) { |
| alertMessagingRef.set(alertMessaging); |
| } |
| |
| @Override |
| public void sendAlerts(final AlertLevel alertLevel, |
| final Instant timestamp, |
| final String threadName, |
| final long threadId, |
| final String formattedMessage, |
| final String stackTrace) { |
| |
| for (AlertListener listener : listeners) { |
| if (alertLevel.meetsOrExceeds(listener.getLevel())) { |
| break; |
| } |
| |
| logger.trace("Sending alert message for {} to {}.", formattedMessage, listener.getMember()); |
| |
| alertMessagingRef.get() |
| .sendAlert(listener.getMember(), alertLevel, timestamp, threadName, threadId, |
| formattedMessage, |
| stackTrace); |
| } |
| } |
| |
| @Override |
| public synchronized void addAlertListener(final DistributedMember member, |
| final AlertLevel alertLevel) { |
| if (alertLevel == AlertLevel.NONE) { |
| return; |
| } |
| AlertListener listener = new AlertListener(alertLevel, member); |
| |
| // Add (or replace) a listener to the list of sorted listeners such that listeners with a |
| // greater level (e.g. FATAL) will be at the end of the list. |
| listeners.remove(listener); |
| for (int i = 0; i < listeners.size(); i++) { |
| if (listener.getLevel().compareTo(listeners.get(i).getLevel()) <= 0) { |
| listeners.add(i, listener); |
| return; |
| } |
| } |
| listeners.add(listener); |
| |
| logger.debug("Added/Replaced alert listener for member {} at level {}.", member, alertLevel); |
| } |
| |
| @Override |
| public synchronized boolean removeAlertListener(final DistributedMember member) { |
| boolean memberWasFound = listeners.remove(new AlertListener(null, member)); |
| if (memberWasFound) { |
| logger.debug("Removed alert listener for member {}.", member); |
| } |
| return memberWasFound; |
| } |
| |
| @Override |
| public synchronized boolean hasAlertListener(final DistributedMember member, |
| final AlertLevel alertLevel) { |
| for (AlertListener listener : listeners) { |
| if (listener.getMember().equals(member) && listener.getLevel().equals(alertLevel)) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public boolean hasAlertListeners() { |
| return !listeners.isEmpty(); |
| } |
| |
| @Override |
| public String toString() { |
| return getClass().getSimpleName() + "@" + Integer.toHexString(hashCode()); |
| } |
| |
| @VisibleForTesting |
| synchronized List<AlertListener> getAlertListeners() { |
| return Collections.unmodifiableList(listeners); |
| } |
| } |