/* * Copyright 2016 MongoDB, Inc. * * Licensed 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 com.mongodb.event; import com.mongodb.diagnostics.logging.Logger; import com.mongodb.diagnostics.logging.Loggers; import java.util.ArrayList; import java.util.Collections; import java.util.List; import static com.mongodb.assertions.Assertions.isTrue; import static com.mongodb.assertions.Assertions.notNull; import static java.lang.String.format; /** * A multicaster for server events. * * @since 3.3 */ public final class ServerMonitorEventMulticaster implements ServerMonitorListener { private static final Logger LOGGER = Loggers.getLogger("cluster.event"); private final List<ServerMonitorListener> serverMonitorListeners; /** * Construct an instance with the given list of server monitor listeners * * @param serverMonitorListeners the non-null list of server monitor listeners, none of which may be null */ public ServerMonitorEventMulticaster(final List<ServerMonitorListener> serverMonitorListeners) { notNull("serverMonitorListeners", serverMonitorListeners); isTrue("All ServerMonitorListener instances are non-null", !serverMonitorListeners.contains(null)); this.serverMonitorListeners = new ArrayList<ServerMonitorListener>(serverMonitorListeners); } /** * Gets the server monitor listeners. * * @return the server monitor listeners */ public List<ServerMonitorListener> getServerMonitorListeners() { return Collections.unmodifiableList(serverMonitorListeners); } @Override public void serverHearbeatStarted(final ServerHeartbeatStartedEvent event) { for (ServerMonitorListener cur : serverMonitorListeners) { try { cur.serverHearbeatStarted(event); } catch (Exception e) { if (LOGGER.isWarnEnabled()) { LOGGER.warn(format("Exception thrown raising server heartbeat started event to listener %s", cur), e); } } } } @Override public void serverHeartbeatSucceeded(final ServerHeartbeatSucceededEvent event) { for (ServerMonitorListener cur : serverMonitorListeners) { try { cur.serverHeartbeatSucceeded(event); } catch (Exception e) { if (LOGGER.isWarnEnabled()) { LOGGER.warn(format("Exception thrown raising server heartbeat succeeded event to listener %s", cur), e); } } } } @Override public void serverHeartbeatFailed(final ServerHeartbeatFailedEvent event) { for (ServerMonitorListener cur : serverMonitorListeners) { try { cur.serverHeartbeatFailed(event); } catch (Exception e) { if (LOGGER.isWarnEnabled()) { LOGGER.warn(format("Exception thrown raising server heartbeat failed event to listener %s", cur), e); } } } } }