| /* |
| * 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 org.apache.geode.alerting.internal.api.AlertingService; |
| import org.apache.geode.alerting.internal.spi.AlertLevel; |
| import org.apache.geode.annotations.Immutable; |
| import org.apache.geode.distributed.DistributedMember; |
| |
| /** |
| * Null implementation of {@link AlertingService} that does nothing. |
| */ |
| public class NullAlertingService implements InternalAlertingService { |
| |
| @Immutable |
| private static final NullAlertingService INSTANCE = new NullAlertingService(); |
| |
| public static NullAlertingService get() { |
| return INSTANCE; |
| } |
| |
| private NullAlertingService() { |
| // nothing |
| } |
| |
| @Override |
| public void useAlertMessaging(AlertMessaging alertMessaging) { |
| // nothing |
| } |
| |
| @Override |
| public void sendAlerts(AlertLevel alertLevel, Instant timestamp, String threadName, long threadId, |
| String formattedMessage, String stackTrace) { |
| // nothing |
| } |
| |
| @Override |
| public void addAlertListener(DistributedMember member, AlertLevel alertLevel) { |
| // nothing |
| } |
| |
| @Override |
| public boolean removeAlertListener(DistributedMember member) { |
| return false; |
| } |
| |
| @Override |
| public boolean hasAlertListener(DistributedMember member, AlertLevel alertLevel) { |
| return false; |
| } |
| |
| @Override |
| public boolean hasAlertListeners() { |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return getClass().getSimpleName() + "@" + Integer.toHexString(hashCode()); |
| } |
| } |