| /* |
| * Copyright (c) 2017 Cisco and/or its affiliates. |
| * |
| * 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 io.fd.maintainer.plugin.events; |
| |
| import com.google.gerrit.common.EventListener; |
| import com.google.gerrit.server.events.Event; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Event listener that automatically describes event that it received |
| */ |
| public abstract class SelfDescribingEventListener implements EventListener { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(SelfDescribingEventListener.class); |
| |
| @Override |
| public void onEvent(final Event event) { |
| if (canConsume(event)) { |
| LOG.info("Event[type={},created={}] has been triggered, consuming ...", event.getType(), |
| event.eventCreatedOn); |
| consumeDescribedEvent(event); |
| LOG.info("Event[type={},created={}] successfully processed", event.getType(), event.eventCreatedOn); |
| } |
| } |
| |
| /** |
| * Consumes event that has been already described |
| */ |
| protected abstract void consumeDescribedEvent(final Event event); |
| |
| /** |
| * Returns true if listener can consume following type of event |
| */ |
| protected abstract boolean canConsume(final Event event); |
| } |