/* 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 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.camunda.bpm.engine.impl.cmd;
import java.io.Serializable;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.camunda.bpm.engine.ProcessEngineException;
import org.camunda.bpm.engine.impl.cfg.TransactionState;
import org.camunda.bpm.engine.impl.context.Context;
import org.camunda.bpm.engine.impl.interceptor.Command;
import org.camunda.bpm.engine.impl.interceptor.CommandContext;
import org.camunda.bpm.engine.impl.interceptor.CommandExecutor;
import org.camunda.bpm.engine.impl.jobexecutor.FailedJobListener;
import org.camunda.bpm.engine.impl.jobexecutor.JobExecutorContext;
import org.camunda.bpm.engine.impl.persistence.entity.JobEntity;
import static org.camunda.bpm.engine.impl.util.EnsureUtil.ensureNotNull;
/**
* @author Tom Baeyens
* @author Daniel Meyer
*/
public class ExecuteJobsCmd implements Command<Object>, Serializable {
private static final long serialVersionUID = 1L;
private static Logger log = Logger.getLogger(ExecuteJobsCmd.class.getName());
protected String jobId;
public ExecuteJobsCmd(String jobId) {
this.jobId = jobId;
}
public Object execute(CommandContext commandContext) {
ensureNotNull("jobId", jobId);
if (log.isLoggable(Level.FINE)) {
log.fine("Executing job " + jobId);
}
JobEntity job = commandContext.getDbEntityManager().selectById(JobEntity.class, jobId);
final CommandExecutor commandExecutor = Context.getProcessEngineConfiguration().getCommandExecutorTxRequiresNew();
final JobExecutorContext jobExecutorContext = Context.getJobExecutorContext();
if (job == null) {
if (jobExecutorContext != null) {
// CAM-1842
// Job was acquired but does not exist anymore. This is not a problem.
// It usually means that the job has been deleted after it was acquired which can happen if the
// the activity instance corresponding to the job is cancelled.
log.log(Level.FINE, "Job with Id " + jobId + " was acquired but cannot be found in database.");
return null;
} else {
throw new ProcessEngineException("No job found with id '" + jobId + "'");
}
}
// the failed job listener is responsible for decrementing the retries and logging the exception to the DB.
FailedJobListener failedJobListener = createFailedJobListener(commandExecutor);
// the listener is ALWAYS added to the transaction as SNYC on ROLLABCK. If the transaction does not rollback, it is ignored.
commandContext.getTransactionContext().addTransactionListener(
TransactionState.ROLLED_BACK,
failedJobListener);
// register as command context close lister to intercept exceptions on flush
commandContext.registerCommandContextListener(failedJobListener);
if (jobExecutorContext != null) { // if null, then we are not called by the job executor
jobExecutorContext.setCurrentJob(job);
}
try {
job.execute(commandContext);
return null;
} catch (RuntimeException exception) {
log.warning("Exception while excuting job '" + job + "': " + exception.getMessage());
// log the exception in the job
failedJobListener.setException(exception);
// throw the original exception to indicate the ExecuteJobCmd failed
throw exception;
} finally {
if (jobExecutorContext != null) {
jobExecutorContext.setCurrentJob(null);
}
}
}
protected FailedJobListener createFailedJobListener(CommandExecutor commandExecutor) {
return new FailedJobListener(commandExecutor, jobId);
}
}