| /* |
| * 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.bad.metadata; |
| |
| import java.util.concurrent.ScheduledExecutorService; |
| |
| import org.apache.asterix.active.ActiveEvent; |
| import org.apache.asterix.active.ActiveEvent.Kind; |
| import org.apache.asterix.active.ActivityState; |
| import org.apache.asterix.active.EntityId; |
| import org.apache.asterix.active.IActiveEntityEventSubscriber; |
| import org.apache.asterix.active.IActiveEntityEventsListener; |
| import org.apache.asterix.common.dataflow.ICcApplicationContext; |
| import org.apache.asterix.common.exceptions.ErrorCode; |
| import org.apache.asterix.common.exceptions.RuntimeDataException; |
| import org.apache.asterix.common.metadata.IDataset; |
| import org.apache.hyracks.api.exceptions.HyracksDataException; |
| import org.apache.hyracks.api.job.DeployedJobSpecId; |
| import org.apache.log4j.Logger; |
| |
| public class DeployedJobSpecEventListener implements IActiveEntityEventsListener { |
| |
| private static final Logger LOGGER = Logger.getLogger(DeployedJobSpecEventListener.class); |
| |
| public enum PrecompiledType { |
| CHANNEL, |
| PUSH_CHANNEL, |
| QUERY, |
| INSERT, |
| DELETE |
| } |
| |
| private DeployedJobSpecId deployedJobSpecId; |
| private ScheduledExecutorService executorService = null; |
| private final PrecompiledType type; |
| |
| // members |
| protected volatile ActivityState state; |
| protected final ICcApplicationContext appCtx; |
| protected final EntityId entityId; |
| protected final ActiveEvent statsUpdatedEvent; |
| protected long statsTimestamp; |
| protected String stats; |
| private int runningInstance; |
| |
| public DeployedJobSpecEventListener(ICcApplicationContext appCtx, EntityId entityId, PrecompiledType type) { |
| this.appCtx = appCtx; |
| this.entityId = entityId; |
| setState(ActivityState.STOPPED); |
| this.statsTimestamp = -1; |
| this.statsUpdatedEvent = new ActiveEvent(null, Kind.STATS_UPDATED, entityId, null); |
| this.stats = "{\"Stats\":\"N/A\"}"; |
| this.type = type; |
| } |
| |
| public DeployedJobSpecId getDeployedJobSpecId() { |
| return deployedJobSpecId; |
| } |
| |
| @Override |
| public EntityId getEntityId() { |
| return entityId; |
| } |
| |
| @Override |
| public ActivityState getState() { |
| return state; |
| } |
| |
| @Override |
| public boolean isEntityUsingDataset(IDataset dataset) { |
| return false; |
| } |
| |
| @Override |
| public String getStats() { |
| return stats; |
| } |
| |
| @Override |
| public long getStatsTimeStamp() { |
| return statsTimestamp; |
| } |
| |
| public PrecompiledType getType() { |
| return type; |
| } |
| |
| public void setDeployedJobSpecId(DeployedJobSpecId deployedJobSpecId) { |
| this.deployedJobSpecId = deployedJobSpecId; |
| } |
| |
| public void setExecutorService(ScheduledExecutorService ses) { |
| this.executorService = ses; |
| } |
| |
| public ScheduledExecutorService getExecutorService() { |
| return executorService; |
| } |
| |
| public void deActivate() { |
| state = ActivityState.STOPPED; |
| } |
| |
| @Override |
| public void notify(ActiveEvent event) { |
| try { |
| switch (event.getEventKind()) { |
| case JOB_STARTED: |
| handleJobStartEvent(event); |
| break; |
| case JOB_FINISHED: |
| handleJobFinishEvent(event); |
| break; |
| default: |
| break; |
| |
| } |
| } catch (Exception e) { |
| LOGGER.error("Unhandled Exception", e); |
| } |
| } |
| |
| @Override |
| public void refreshStats(long l) throws HyracksDataException { |
| // no op |
| } |
| |
| protected synchronized void setState(ActivityState newState) { |
| LOGGER.info("State of " + getEntityId() + "is being set to " + newState + " from " + state); |
| this.state = newState; |
| notifyAll(); |
| } |
| |
| private synchronized void handleJobStartEvent(ActiveEvent message) throws Exception { |
| if (LOGGER.isInfoEnabled()) { |
| LOGGER.info("Channel Job started for " + entityId); |
| } |
| runningInstance++; |
| setState(ActivityState.RUNNING); |
| } |
| |
| private synchronized void handleJobFinishEvent(ActiveEvent message) throws Exception { |
| if (LOGGER.isInfoEnabled()) { |
| LOGGER.info("Channel Job finished for " + entityId); |
| } |
| runningInstance--; |
| if (runningInstance == 0) { |
| setState(ActivityState.STOPPED); |
| } |
| } |
| |
| public synchronized void waitWhileAtState(ActivityState undesiredState) throws InterruptedException { |
| while (state == undesiredState) { |
| this.wait(); |
| } |
| } |
| |
| public synchronized void suspend() throws HyracksDataException, InterruptedException { |
| LOGGER.info("Suspending entity " + entityId); |
| LOGGER.info("Waiting for ongoing activities of " + entityId); |
| waitWhileAtState(ActivityState.RUNNING); |
| LOGGER.info("Proceeding with suspension of " + entityId + ". Current state is " + state); |
| setState(ActivityState.SUSPENDED); |
| LOGGER.info("Successfully Suspended " + entityId); |
| } |
| |
| public synchronized void resume() throws HyracksDataException { |
| LOGGER.info("Resuming entity " + entityId); |
| if (state != ActivityState.SUSPENDED) { |
| throw new RuntimeDataException(ErrorCode.ACTIVE_ENTITY_CANNOT_RESUME_FROM_STATE, entityId, state); |
| } |
| setState(ActivityState.STOPPED); |
| LOGGER.info("Successfully resumed " + entityId); |
| } |
| |
| @Override |
| public synchronized void subscribe(IActiveEntityEventSubscriber subscriber) { |
| // no op |
| } |
| |
| @Override |
| public boolean isActive() { |
| return state == ActivityState.RUNNING; |
| } |
| |
| @Override |
| public void unregister() throws HyracksDataException { |
| } |
| |
| @Override |
| public Exception getJobFailure() { |
| return null; |
| } |
| |
| @Override |
| public String getDisplayName() throws HyracksDataException { |
| return this.entityId.toString(); |
| } |
| |
| public int getRunningInstance() { |
| return runningInstance; |
| } |
| |
| @Override |
| public synchronized boolean isSuspended() { |
| return state == ActivityState.SUSPENDED; |
| } |
| } |