Activator.java
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上传日期:2018-01-08
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文件大小:2k
- /**
- * 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.hadoop.eclipse;
- import org.apache.hadoop.eclipse.servers.ServerRegistry;
- import org.eclipse.ui.plugin.AbstractUIPlugin;
- import org.osgi.framework.BundleContext;
- /**
- * The activator class controls the plug-in life cycle
- */
- public class Activator extends AbstractUIPlugin {
- /**
- * The plug-in ID
- */
- public static final String PLUGIN_ID = "org.apache.hadoop.eclipse";
- /**
- * The shared unique instance (singleton)
- */
- private static Activator plugin;
- /**
- * Constructor
- */
- public Activator() {
- synchronized (Activator.class) {
- if (plugin != null) {
- // Not a singleton!?
- throw new RuntimeException("Activator for " + PLUGIN_ID
- + " is not a singleton");
- }
- plugin = this;
- }
- }
- /* @inheritDoc */
- @Override
- public void start(BundleContext context) throws Exception {
- super.start(context);
- }
- /* @inheritDoc */
- @Override
- public void stop(BundleContext context) throws Exception {
- ServerRegistry.getInstance().dispose();
- plugin = null;
- super.stop(context);
- }
- /**
- * Returns the shared unique instance (singleton)
- *
- * @return the shared unique instance (singleton)
- */
- public static Activator getDefault() {
- return plugin;
- }
- }