/**
* 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.activemq.broker.scheduler;
import java.io.File;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.activemq.ScheduledMessage;
import org.apache.activemq.broker.Broker;
import org.apache.activemq.broker.BrokerFilter;
import org.apache.activemq.broker.ConnectionContext;
import org.apache.activemq.broker.ProducerBrokerExchange;
import org.apache.activemq.command.Message;
import org.apache.activemq.command.MessageId;
import org.apache.activemq.command.ProducerId;
import org.apache.activemq.command.ProducerInfo;
import org.apache.activemq.openwire.OpenWireFormat;
import org.apache.activemq.security.SecurityContext;
import org.apache.activemq.state.ProducerState;
import org.apache.activemq.util.IdGenerator;
import org.apache.activemq.util.LongSequenceGenerator;
import org.apache.activemq.util.TypeConversionSupport;
import org.apache.activemq.wireformat.WireFormat;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.kahadb.util.ByteSequence;
public class SchedulerBroker extends BrokerFilter implements JobListener {
private static final Log LOG = LogFactory.getLog(SchedulerBroker.class);
private static final IdGenerator ID_GENERATOR = new IdGenerator();
private final LongSequenceGenerator messageIdGenerator = new LongSequenceGenerator();
private final AtomicBoolean started = new AtomicBoolean();
private final WireFormat wireFormat = new OpenWireFormat();
private final ConnectionContext context = new ConnectionContext();
private final ProducerId producerId = new ProducerId();
private File directory;
private JobSchedulerStore store;
private JobScheduler scheduler;
public SchedulerBroker(Broker next, File directory) throws Exception {
super(next);
this.directory = directory;
this.producerId.setConnectionId(ID_GENERATOR.generateId());
this.context.setSecurityContext(SecurityContext.BROKER_SECURITY_CONTEXT);
context.setBroker(next);
LOG.info("Scheduler using directory: " + directory);
}
public synchronized JobScheduler getJobScheduler() throws Exception {
return new JobSchedulerFacade(this);
}
/**
* @return the directory
*/
public File getDirectory() {
return this.directory;
}
/**
* @param directory
* the directory to set
*/
public void setDirectory(File directory) {
this.directory = directory;
}
@Override
public void start() throws Exception {
this.started.set(true);
getInternalScheduler();
super.start();
}
@Override
public void stop() throws Exception {
if (this.started.compareAndSet(true, false)) {
if (this.store != null) {
this.store.stop();
}
if (this.scheduler != null) {
this.scheduler.removeListener(this);
this.scheduler = null;
}
}
super.stop();
}
@Override
public void send(ProducerBrokerExchange producerExchange, Message messageSend) throws Exception {
long delay = 0;
long period = 0;
int repeat = 0;
String cronEntry = "";
Object cronValue = messageSend.getProperty(ScheduledMessage.AMQ_SCHEDULED_CRON);
Object periodValue = messageSend.getProperty(ScheduledMessage.AMQ_SCHEDULED_PERIOD);
Object delayValue = messageSend.getProperty(ScheduledMessage.AMQ_SCHEDULED_DELAY);
if (cronValue != null || periodValue != null || delayValue != null) {
//clear transaction context
Message msg = messageSend.copy();
msg.setTransactionId(null);
org.apache.activemq.util.ByteSequence packet = wireFormat.marshal(msg);
if (cronValue != null) {
cronEntry = cronValue.toString();
}
if (periodValue != null) {
period = (Long) TypeConversionSupport.convert(periodValue, Long.class);
}
if (delayValue != null) {
delay = (Long) TypeConversionSupport.convert(delayValue, Long.class);
}
Object repeatValue = msg.getProperty(ScheduledMessage.AMQ_SCHEDULED_REPEAT);
if (repeatValue != null) {
repeat = (Integer) TypeConversionSupport.convert(repeatValue, Integer.class);
}
getInternalScheduler().schedule(msg.getMessageId().toString(),
new ByteSequence(packet.data, packet.offset, packet.length),cronEntry, delay, period, repeat);
} else {
super.send(producerExchange, messageSend);
}
}
public void scheduledJob(String id, ByteSequence job) {
org.apache.activemq.util.ByteSequence packet = new org.apache.activemq.util.ByteSequence(job.getData(), job
.getOffset(), job.getLength());
try {
Message messageSend = (Message) this.wireFormat.unmarshal(packet);
messageSend.setOriginalTransactionId(null);
Object repeatValue = messageSend.getProperty(ScheduledMessage.AMQ_SCHEDULED_REPEAT);
Object cronValue = messageSend.getProperty(ScheduledMessage.AMQ_SCHEDULED_REPEAT);
String cronStr = cronValue != null ? cronValue.toString() : null;
int repeat = 0;
if (repeatValue != null) {
repeat = (Integer) TypeConversionSupport.convert(repeatValue, Integer.class);
}
if (repeat != 0 || cronStr != null && cronStr.length() > 0) {
// create a unique id - the original message could be sent
// lots of times
messageSend
.setMessageId(new MessageId(this.producerId, this.messageIdGenerator.getNextSequenceId()));
}
// Add the jobId as a property
messageSend.setProperty("scheduledJobId", id);
// if this goes across a network - we don't want it rescheduled
messageSend.removeProperty(ScheduledMessage.AMQ_SCHEDULED_PERIOD);
messageSend.removeProperty(ScheduledMessage.AMQ_SCHEDULED_DELAY);
messageSend.removeProperty(ScheduledMessage.AMQ_SCHEDULED_REPEAT);
messageSend.removeProperty(ScheduledMessage.AMQ_SCHEDULED_CRON);
final ProducerBrokerExchange producerExchange = new ProducerBrokerExchange();
producerExchange.setConnectionContext(context);
producerExchange.setMutable(true);
producerExchange.setProducerState(new ProducerState(new ProducerInfo()));
super.send(producerExchange, messageSend);
} catch (Exception e) {
LOG.error("Failed to send scheduled message " + id, e);
}
}
protected synchronized JobScheduler getInternalScheduler() throws Exception {
if (this.started.get()) {
if (this.scheduler == null) {
this.scheduler = getStore().getJobScheduler("JMS");
this.scheduler.addListener(this);
}
return this.scheduler;
}
return null;
}
private JobSchedulerStore getStore() throws Exception {
if (started.get()) {
if (this.store == null) {
this.store = new JobSchedulerStore();
this.store.setDirectory(directory);
this.store.start();
}
return this.store;
}
return null;
}
}