| /** |
| * 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.storm.loadgen; |
| |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.Set; |
| import org.apache.storm.generated.KillOptions; |
| import org.apache.storm.generated.Nimbus; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * A set of topology names that will be killed when this is closed, or when the |
| * program exits. |
| */ |
| public class ScopedTopologySet extends HashSet<String> implements AutoCloseable { |
| private static final Logger LOG = LoggerFactory.getLogger(ScopedTopologySet.class); |
| private static final KillOptions NO_WAIT_KILL = new KillOptions(); |
| |
| static { |
| NO_WAIT_KILL.set_wait_secs(0); |
| } |
| |
| private final Nimbus.Iface client; |
| private boolean closed = false; |
| |
| /** |
| * Constructor. |
| * @param client the client used to kill the topologies when this exist. |
| */ |
| public ScopedTopologySet(Nimbus.Iface client) { |
| this.client = client; |
| Runtime.getRuntime().addShutdownHook(new Thread(() -> { |
| try { |
| close(); |
| } catch (Exception e) { |
| LOG.error("Error trying to shutdown topologies on exit", e); |
| } |
| })); |
| } |
| |
| @Override |
| public boolean remove(Object o) { |
| throw new RuntimeException("Unmodifiable Set"); |
| } |
| |
| @Override |
| public void clear() { |
| throw new RuntimeException("Unmodifiable Set"); |
| } |
| |
| @Override |
| public boolean removeAll(Collection<?> c) { |
| throw new RuntimeException("Unmodifiable Set"); |
| } |
| |
| @Override |
| public boolean retainAll(Collection<?> c) { |
| throw new RuntimeException("Unmodifiable Set"); |
| } |
| |
| @Override |
| public void close() { |
| if (closed) { |
| return; |
| } |
| RuntimeException saved = null; |
| for (Iterator<String> it = super.iterator(); it.hasNext();) { |
| String name = it.next(); |
| try { |
| client.killTopologyWithOpts(name, NO_WAIT_KILL); |
| it.remove(); |
| } catch (Exception e) { |
| RuntimeException wrapped = new RuntimeException("Error trying to kill " + name, e); |
| if (saved != null) { |
| saved.addSuppressed(wrapped); |
| } else { |
| saved = wrapped; |
| } |
| } |
| } |
| super.clear(); |
| if (saved != null) { |
| throw saved; |
| } |
| closed = true; |
| } |
| } |