| /* |
| * Copyright 2009-2010 by The Regents of the University of California |
| * 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 from |
| * |
| * 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 edu.uci.ics.hyracks.control.cc.remote; |
| |
| import java.util.List; |
| import java.util.Vector; |
| import java.util.concurrent.Semaphore; |
| |
| import edu.uci.ics.hyracks.control.cc.ClusterControllerService; |
| import edu.uci.ics.hyracks.control.cc.NodeControllerState; |
| import edu.uci.ics.hyracks.control.common.base.INodeController; |
| |
| public class RemoteRunner { |
| public static <T, R> R runRemote(ClusterControllerService ccs, final RemoteOp<T>[] remoteOps, |
| final Accumulator<T, R> accumulator) throws Exception { |
| final Semaphore installComplete = new Semaphore(remoteOps.length); |
| final List<Exception> errors = new Vector<Exception>(); |
| for (final RemoteOp<T> remoteOp : remoteOps) { |
| NodeControllerState nodeState = ccs.getNodeMap().get(remoteOp.getNodeId()); |
| final INodeController node = nodeState.getNodeController(); |
| |
| installComplete.acquire(); |
| Runnable remoteRunner = new Runnable() { |
| @Override |
| public void run() { |
| try { |
| T t = remoteOp.execute(node); |
| if (accumulator != null) { |
| synchronized (accumulator) { |
| accumulator.accumulate(t); |
| } |
| } |
| } catch (Exception e) { |
| errors.add(e); |
| } finally { |
| installComplete.release(); |
| } |
| } |
| }; |
| |
| ccs.getExecutor().execute(remoteRunner); |
| } |
| installComplete.acquire(remoteOps.length); |
| if (!errors.isEmpty()) { |
| throw errors.get(0); |
| } |
| return accumulator == null ? null : accumulator.getResult(); |
| } |
| } |