| package org.apache.helix.cloud.event; |
| |
| /* |
| * 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. |
| */ |
| |
| /** |
| * This class is a basic unit for callbacks to handle events. |
| * The listeners can be registered to {@link CloudEventHandler}. |
| */ |
| public interface CloudEventListener { |
| enum ListenerType { |
| PRE_EVENT_HANDLER, UNORDERED, POST_EVENT_HANDLER |
| } |
| |
| /** |
| * Callback for when a pause event is incoming |
| * @param eventInfo the info of the incoming event |
| */ |
| void onPause(Object eventInfo); |
| |
| /** |
| * Callback for when a pause event finishes |
| * @param eventInfo the info of the incoming event |
| */ |
| void onResume(Object eventInfo); |
| |
| /** |
| * Get the listener type of a listener |
| * @return the type of the listener |
| */ |
| ListenerType getListenerType(); |
| } |