| /* |
| * 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.uima.ducc.sm; |
| |
| import org.apache.uima.ducc.common.utils.DuccLogger; |
| import org.apache.uima.ducc.common.utils.DuccProperties; |
| import org.apache.uima.ducc.common.utils.SystemPropertyResolver; |
| import org.apache.uima.ducc.transport.event.common.IDuccState.JobState; |
| |
| /** |
| * Represent a single instance. |
| * |
| * This is a simple class, mostly just a container for the state machine. |
| */ |
| class PingOnlyServiceInstance |
| extends ServiceInstance |
| { |
| private DuccLogger logger = DuccLogger.getLogger(this.getClass().getName(), COMPONENT_NAME); |
| private PingOnlyDriver driver = null; |
| private PingOnlyServiceInstance me; |
| |
| PingOnlyServiceInstance(ServiceSet sset) |
| { |
| super(sset); |
| me = this; |
| } |
| |
| // void setState(DuccWorkJob dwj) |
| // { |
| // this.state = dwj.getJobState(); |
| // } |
| |
| long start(DuccProperties svc_props, DuccProperties meta_props) |
| { |
| String methodName = "start"; |
| |
| // ping-only, we have no idea what the state of the remote service is, so we assume |
| // it is running. If not the ping will fail anyway, preventing dependent jobs from |
| // using it. |
| logger.info(methodName, sset.getId(), "START PING-ONLY INSTANCE"); |
| state = JobState.Running; |
| setStopped(false); |
| driver = new PingOnlyDriver(); |
| Thread driver_thread = new Thread(driver); |
| driver_thread.setName("PingOnlyDriver-" + sset.getId().getFriendly()); |
| driver_thread.start(); |
| return numeric_id; |
| } |
| |
| |
| /** |
| * This assumes the caller has already verified that I'm a registered service. |
| */ |
| void stop() |
| { |
| String methodName = "stop"; |
| logger.info(methodName, sset.getId(), "STOP PING-ONLY INSTANCE"); |
| state = JobState.Completed; |
| sset.signal(me); |
| sset.removeImplementor(this); |
| driver.stop(); |
| setStopped(true); |
| } |
| |
| /** |
| * Must simulate state being driven in from the OR |
| */ |
| class PingOnlyDriver |
| implements Runnable |
| { |
| boolean stopped = false; |
| |
| public synchronized void stop() |
| { |
| this.stopped = true; |
| } |
| |
| public void run() |
| { |
| String methodName = "PingOnlyDriver.run()"; |
| int delay = SystemPropertyResolver.getIntProperty("ducc.orchestrator.state.publish.rate", 30000); |
| |
| while ( true ) { |
| if (stopped) return; |
| |
| try { |
| logger.info(methodName, sset.getId(), "Starts Wait of", delay); |
| Thread.sleep(delay); |
| //logger.info(methodName, sset.getId(), "Returns"); |
| } catch (InterruptedException e) { |
| // nothing |
| } |
| sset.signal(me); |
| } |
| } |
| |
| |
| } |
| |
| } |