| /* |
| * 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.asterix.metadata.bootstrap; |
| |
| import java.rmi.RemoteException; |
| import java.rmi.server.UnicastRemoteObject; |
| import java.util.concurrent.TimeUnit; |
| import java.util.logging.Logger; |
| |
| import org.apache.asterix.metadata.api.IAsterixStateProxy; |
| import org.apache.asterix.metadata.api.IMetadataNode; |
| |
| /** |
| * Contains Asterix distributed state such as the AsterixProperties. |
| */ |
| public class AsterixStateProxy implements IAsterixStateProxy { |
| private static final long serialVersionUID = 1L; |
| private static final Logger LOGGER = Logger.getLogger(AsterixStateProxy.class.getName()); |
| |
| private IMetadataNode metadataNode; |
| private static final IAsterixStateProxy cc = new AsterixStateProxy(); |
| |
| public static IAsterixStateProxy registerRemoteObject(int metadataCallbackPort) throws RemoteException { |
| IAsterixStateProxy stub = (IAsterixStateProxy) UnicastRemoteObject.exportObject(cc, metadataCallbackPort); |
| LOGGER.info("Asterix Distributed State Proxy Bound"); |
| return stub; |
| } |
| |
| public static void unregisterRemoteObject() throws RemoteException { |
| UnicastRemoteObject.unexportObject(cc, true); |
| LOGGER.info("Asterix Distributed State Proxy Unbound"); |
| } |
| |
| @Override |
| public synchronized void setMetadataNode(IMetadataNode metadataNode) { |
| this.metadataNode = metadataNode; |
| notifyAll(); |
| } |
| |
| @Override |
| public IMetadataNode waitForMetadataNode(long waitFor, TimeUnit timeUnit) throws InterruptedException { |
| synchronized (this) { |
| long timeToWait = TimeUnit.MILLISECONDS.convert(waitFor, timeUnit); |
| while (metadataNode == null && timeToWait > 0) { |
| long startTime = System.currentTimeMillis(); |
| wait(timeToWait); |
| timeToWait -= System.currentTimeMillis() - startTime; |
| } |
| return metadataNode; |
| } |
| } |
| } |