| /** |
| * 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.localizer; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.Future; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| import org.apache.storm.generated.LocalAssignment; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class LocalDownloadedResource { |
| private static final Logger LOG = LoggerFactory.getLogger(LocalDownloadedResource.class); |
| private static class NoCancelFuture<T> implements Future<T> { |
| private final Future<T> _wrapped; |
| |
| public NoCancelFuture(Future<T> wrapped) { |
| _wrapped = wrapped; |
| } |
| |
| @Override |
| public boolean cancel(boolean mayInterruptIfRunning) { |
| //cancel not currently supported |
| return false; |
| } |
| |
| @Override |
| public boolean isCancelled() { |
| return false; |
| } |
| |
| @Override |
| public boolean isDone() { |
| return _wrapped.isDone(); |
| } |
| |
| @Override |
| public T get() throws InterruptedException, ExecutionException { |
| return _wrapped.get(); |
| } |
| |
| @Override |
| public T get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException { |
| return _wrapped.get(timeout, unit); |
| } |
| } |
| private static class PortNAssignment { |
| private final int _port; |
| private final LocalAssignment _assignment; |
| |
| public PortNAssignment(int port, LocalAssignment assignment) { |
| _port = port; |
| _assignment = assignment; |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (!(other instanceof PortNAssignment)) { |
| return false; |
| } |
| PortNAssignment pna = (PortNAssignment) other; |
| return pna._port == _port && _assignment.equals(pna._assignment); |
| } |
| |
| @Override |
| public int hashCode() { |
| return (17 * _port) + _assignment.hashCode(); |
| } |
| |
| @Override |
| public String toString() { |
| return "{"+ _port + " " + _assignment +"}"; |
| } |
| } |
| private final Future<Void> _pending; |
| private final Set<PortNAssignment> _references; |
| private boolean _isDone; |
| |
| |
| public LocalDownloadedResource(Future<Void> pending) { |
| _pending = new NoCancelFuture<>(pending); |
| _references = new HashSet<>(); |
| _isDone = false; |
| } |
| |
| /** |
| * Reserve the resources |
| * @param port the port this is for |
| * @param la the assignment this is for |
| * @return a future that can be used to track it being downloaded. |
| */ |
| public synchronized Future<Void> reserve(int port, LocalAssignment la) { |
| PortNAssignment pna = new PortNAssignment(port, la); |
| if (!_references.add(pna)) { |
| LOG.warn("Resources {} already reserved {} for this topology", pna, _references); |
| } |
| return _pending; |
| } |
| |
| /** |
| * Release a port from the reference count, and update isDone if all is done. |
| * @param port the port to release |
| * @param la the assignment to release |
| * @return true if the port was being counted else false |
| */ |
| public synchronized boolean release(int port, LocalAssignment la) { |
| PortNAssignment pna = new PortNAssignment(port, la); |
| boolean ret = _references.remove(pna); |
| if (ret && _references.isEmpty()) { |
| _isDone = true; |
| } |
| return ret; |
| } |
| |
| /** |
| * Is this has been cleaned up completely. |
| * @return true if it is done else false |
| */ |
| public synchronized boolean isDone() { |
| return _isDone; |
| } |
| |
| @Override |
| public String toString() { |
| return _references.toString(); |
| } |
| } |