Java tutorial
/* * 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.jclouds.examples.rackspace.cloudblockstorage; import com.google.common.io.Closeables; import org.jclouds.ContextBuilder; import org.jclouds.openstack.cinder.v1.CinderApi; import org.jclouds.openstack.cinder.v1.domain.Snapshot; import org.jclouds.openstack.cinder.v1.features.SnapshotApi; import org.jclouds.openstack.cinder.v1.predicates.SnapshotPredicates; import java.io.Closeable; import java.io.IOException; import java.util.concurrent.TimeoutException; import static org.jclouds.examples.rackspace.cloudblockstorage.Constants.*; /** * This example deletes a snapshot. */ public class DeleteSnapshot implements Closeable { private final CinderApi cinderApi; private final SnapshotApi snapshotApi; /** * To get a username and API key see * http://jclouds.apache.org/guides/rackspace/ * * The first argument (args[0]) must be your username * The second argument (args[1]) must be your API key */ public static void main(String[] args) throws IOException { DeleteSnapshot deleteSnapshot = new DeleteSnapshot(args[0], args[1]); try { Snapshot snapshot = deleteSnapshot.getSnapshot(); deleteSnapshot.deleteSnapshot(snapshot); } catch (Exception e) { e.printStackTrace(); } finally { deleteSnapshot.close(); } } public DeleteSnapshot(String username, String apiKey) { cinderApi = ContextBuilder.newBuilder(PROVIDER).credentials(username, apiKey).buildApi(CinderApi.class); snapshotApi = cinderApi.getSnapshotApi(REGION); } /** * @return Snapshot The Snapshot created in the CreateSnapshot example */ private Snapshot getSnapshot() { for (Snapshot snapshot : snapshotApi.list()) { if (snapshot.getName().startsWith(NAME)) { return snapshot; } } throw new RuntimeException(NAME + " not found. Run the CreateSnapshot example first."); } private void deleteSnapshot(Snapshot snapshot) throws TimeoutException { System.out.format("Delete Snapshot%n"); boolean result = snapshotApi.delete(snapshot.getId()); // Wait for the snapshot to be deleted before moving on // If you want to know what's happening during the polling, enable logging. // See /jclouds-example/rackspace/src/main/java/org/jclouds/examples/rackspace/Logging.java if (!SnapshotPredicates.awaitDeleted(snapshotApi).apply(snapshot)) { throw new TimeoutException("Timeout on snapshot: " + snapshot); } System.out.format(" %s%n", result); } /** * Always close your service when you're done with it. * * Note that closing quietly like this is not necessary in Java 7. * You would use try-with-resources in the main method instead. */ public void close() throws IOException { Closeables.close(cinderApi, true); } }