public void testGet() throws Exception {
WorkflowActionBean bean =
addRecordToWfActionTable("workflowId", "testAction", WorkflowAction.Status.PREP, "", true);
WorkflowActionBean retBean;
// GET_ACTION_ID_TYPE_LASTCHECK
retBean =
WorkflowActionQueryExecutor.getInstance()
.get(WorkflowActionQuery.GET_ACTION_ID_TYPE_LASTCHECK, bean.getId());
assertEquals(bean.getId(), retBean.getId());
assertEquals(bean.getType(), retBean.getType());
assertEquals(bean.getLastCheckTime(), retBean.getLastCheckTime());
// GET_ACTION_FAIL
retBean =
WorkflowActionQueryExecutor.getInstance()
.get(WorkflowActionQuery.GET_ACTION_FAIL, bean.getId());
assertEquals(bean.getId(), retBean.getId());
assertEquals(bean.getJobId(), retBean.getJobId());
assertEquals(bean.getName(), retBean.getName());
assertEquals(bean.getStatusStr(), retBean.getStatusStr());
assertEquals(bean.getPending(), retBean.getPending());
assertEquals(bean.getType(), retBean.getType());
assertEquals(bean.getLogToken(), retBean.getLogToken());
assertEquals(bean.getTransition(), retBean.getTransition());
assertEquals(bean.getErrorCode(), retBean.getErrorCode());
assertEquals(bean.getErrorMessage(), retBean.getErrorMessage());
assertNull(retBean.getConf());
assertNull(retBean.getSlaXml());
assertNull(retBean.getData());
assertNull(retBean.getStats());
assertNull(retBean.getExternalChildIDs());
// GET_ACTION_SIGNAL
retBean =
WorkflowActionQueryExecutor.getInstance()
.get(WorkflowActionQuery.GET_ACTION_SIGNAL, bean.getId());
assertEquals(bean.getId(), retBean.getId());
assertEquals(bean.getJobId(), retBean.getJobId());
assertEquals(bean.getName(), retBean.getName());
assertEquals(bean.getStatusStr(), retBean.getStatusStr());
assertEquals(bean.getPending(), retBean.getPending());
assertEquals(bean.getPendingAge().getTime(), retBean.getPendingAge().getTime());
assertEquals(bean.getType(), retBean.getType());
assertEquals(bean.getLogToken(), retBean.getLogToken());
assertEquals(bean.getTransition(), retBean.getTransition());
assertEquals(bean.getErrorCode(), retBean.getErrorCode());
assertEquals(bean.getErrorMessage(), retBean.getErrorMessage());
assertEquals(bean.getExecutionPath(), retBean.getExecutionPath());
assertEquals(bean.getSignalValue(), retBean.getSignalValue());
assertEquals(bean.getSlaXml(), retBean.getSlaXml());
assertNull(retBean.getConf());
assertNull(retBean.getData());
assertNull(retBean.getStats());
assertNull(retBean.getExternalChildIDs());
// GET_ACTION_CHECK
retBean =
WorkflowActionQueryExecutor.getInstance()
.get(WorkflowActionQuery.GET_ACTION_CHECK, bean.getId());
assertEquals(bean.getId(), retBean.getId());
assertEquals(bean.getJobId(), retBean.getJobId());
assertEquals(bean.getName(), retBean.getName());
assertEquals(bean.getStatusStr(), retBean.getStatusStr());
assertEquals(bean.getPending(), retBean.getPending());
assertEquals(bean.getPendingAge().getTime(), retBean.getPendingAge().getTime());
assertEquals(bean.getType(), retBean.getType());
assertEquals(bean.getLogToken(), retBean.getLogToken());
assertEquals(bean.getTransition(), retBean.getTransition());
assertEquals(bean.getRetries(), retBean.getRetries());
assertEquals(bean.getUserRetryCount(), retBean.getUserRetryCount());
assertEquals(bean.getUserRetryMax(), retBean.getUserRetryMax());
assertEquals(bean.getUserRetryInterval(), retBean.getUserRetryInterval());
assertEquals(bean.getTrackerUri(), retBean.getTrackerUri());
assertEquals(bean.getStartTime().getTime(), retBean.getStartTime().getTime());
assertEquals(bean.getEndTime().getTime(), retBean.getEndTime().getTime());
assertEquals(bean.getLastCheckTime().getTime(), retBean.getLastCheckTime().getTime());
assertEquals(bean.getErrorCode(), retBean.getErrorCode());
assertEquals(bean.getErrorMessage(), retBean.getErrorMessage());
assertEquals(bean.getExternalId(), retBean.getExternalId());
assertEquals(bean.getExternalStatus(), retBean.getExternalStatus());
assertEquals(bean.getExternalChildIDs(), retBean.getExternalChildIDs());
assertEquals(bean.getConf(), retBean.getConf());
assertNull(retBean.getData());
assertNull(retBean.getStats());
assertNull(retBean.getSlaXml());
// GET_ACTION_END
retBean =
WorkflowActionQueryExecutor.getInstance()
.get(WorkflowActionQuery.GET_ACTION_END, bean.getId());
assertEquals(bean.getId(), retBean.getId());
assertEquals(bean.getJobId(), retBean.getJobId());
assertEquals(bean.getName(), retBean.getName());
assertEquals(bean.getStatusStr(), retBean.getStatusStr());
assertEquals(bean.getPending(), retBean.getPending());
assertEquals(bean.getPendingAge().getTime(), retBean.getPendingAge().getTime());
assertEquals(bean.getType(), retBean.getType());
assertEquals(bean.getLogToken(), retBean.getLogToken());
assertEquals(bean.getTransition(), retBean.getTransition());
assertEquals(bean.getRetries(), retBean.getRetries());
assertEquals(bean.getTrackerUri(), retBean.getTrackerUri());
assertEquals(bean.getUserRetryCount(), retBean.getUserRetryCount());
assertEquals(bean.getUserRetryMax(), retBean.getUserRetryMax());
assertEquals(bean.getUserRetryInterval(), retBean.getUserRetryInterval());
assertEquals(bean.getExternalId(), retBean.getExternalId());
assertEquals(bean.getExternalStatus(), retBean.getExternalStatus());
assertEquals(bean.getExternalChildIDs(), retBean.getExternalChildIDs());
assertEquals(bean.getStartTime().getTime(), retBean.getStartTime().getTime());
assertEquals(bean.getEndTime().getTime(), retBean.getEndTime().getTime());
assertEquals(bean.getErrorCode(), retBean.getErrorCode());
assertEquals(bean.getErrorMessage(), retBean.getErrorMessage());
assertEquals(bean.getConf(), retBean.getConf());
assertEquals(bean.getData(), retBean.getData());
assertEquals(bean.getStats(), retBean.getStats());
assertNull(retBean.getSlaXml());
// GET_ACTION_COMPLETED
retBean =
WorkflowActionQueryExecutor.getInstance()
.get(WorkflowActionQuery.GET_ACTION_COMPLETED, bean.getId());
assertEquals(bean.getId(), retBean.getId());
assertEquals(bean.getJobId(), retBean.getJobId());
assertEquals(bean.getStatusStr(), retBean.getStatusStr());
assertEquals(bean.getType(), retBean.getType());
assertEquals(bean.getLogToken(), retBean.getLogToken());
assertNull(retBean.getSlaXml());
assertNull(retBean.getConf());
assertNull(retBean.getData());
assertNull(retBean.getStats());
assertNull(retBean.getExternalChildIDs());
// GET_ACTION (entire obj)
retBean =
WorkflowActionQueryExecutor.getInstance().get(WorkflowActionQuery.GET_ACTION, bean.getId());
assertEquals(bean.getId(), retBean.getId());
assertEquals(bean.getJobId(), retBean.getJobId());
assertEquals(bean.getName(), retBean.getName());
assertEquals(bean.getStatusStr(), retBean.getStatusStr());
assertEquals(bean.getPending(), retBean.getPending());
assertEquals(bean.getPendingAge().getTime(), retBean.getPendingAge().getTime());
assertEquals(bean.getType(), retBean.getType());
assertEquals(bean.getLogToken(), retBean.getLogToken());
assertEquals(bean.getTransition(), retBean.getTransition());
assertEquals(bean.getRetries(), retBean.getRetries());
assertEquals(bean.getUserRetryCount(), retBean.getUserRetryCount());
assertEquals(bean.getUserRetryMax(), retBean.getUserRetryMax());
assertEquals(bean.getUserRetryInterval(), retBean.getUserRetryInterval());
assertEquals(bean.getStartTime().getTime(), retBean.getStartTime().getTime());
assertEquals(bean.getEndTime().getTime(), retBean.getEndTime().getTime());
assertEquals(bean.getCreatedTime().getTime(), retBean.getCreatedTime().getTime());
assertEquals(bean.getLastCheckTime().getTime(), retBean.getLastCheckTime().getTime());
assertEquals(bean.getErrorCode(), retBean.getErrorCode());
assertEquals(bean.getErrorMessage(), retBean.getErrorMessage());
assertEquals(bean.getExecutionPath(), retBean.getExecutionPath());
assertEquals(bean.getSignalValue(), retBean.getSignalValue());
assertEquals(bean.getCred(), retBean.getCred());
assertEquals(bean.getConf(), retBean.getConf());
assertEquals(bean.getSlaXml(), retBean.getSlaXml());
assertEquals(bean.getData(), retBean.getData());
assertEquals(bean.getStats(), retBean.getStats());
assertEquals(bean.getExternalChildIDs(), retBean.getExternalChildIDs());
}
public void testGetUpdateQuery() throws Exception {
EntityManager em = jpaService.getEntityManager();
WorkflowJobBean job =
this.addRecordToWfJobTable(WorkflowJob.Status.RUNNING, WorkflowInstance.Status.RUNNING);
WorkflowActionBean bean =
addRecordToWfActionTable(job.getId(), "1", WorkflowAction.Status.PREP);
// UPDATE_ACTION
Query query =
WorkflowActionQueryExecutor.getInstance()
.getUpdateQuery(WorkflowActionQuery.UPDATE_ACTION, bean, em);
assertEquals(query.getParameterValue("conf"), bean.getConfBlob());
assertEquals(query.getParameterValue("consoleUrl"), bean.getConsoleUrl());
assertEquals(query.getParameterValue("data"), bean.getDataBlob());
assertEquals(query.getParameterValue("stats"), bean.getStatsBlob());
assertEquals(query.getParameterValue("externalChildIDs"), bean.getExternalChildIDsBlob());
assertEquals(query.getParameterValue("errorCode"), bean.getErrorCode());
assertEquals(query.getParameterValue("errorMessage"), bean.getErrorMessage());
assertEquals(query.getParameterValue("externalId"), bean.getExternalId());
assertEquals(query.getParameterValue("externalStatus"), bean.getExternalStatus());
assertEquals(query.getParameterValue("name"), bean.getName());
assertEquals(query.getParameterValue("cred"), bean.getCred());
assertEquals(query.getParameterValue("retries"), bean.getRetries());
assertEquals(query.getParameterValue("trackerUri"), bean.getTrackerUri());
assertEquals(query.getParameterValue("transition"), bean.getTransition());
assertEquals(query.getParameterValue("type"), bean.getType());
assertEquals(query.getParameterValue("endTime"), bean.getEndTimestamp());
assertEquals(query.getParameterValue("executionPath"), bean.getExecutionPath());
assertEquals(query.getParameterValue("lastCheckTime"), bean.getLastCheckTimestamp());
assertEquals(query.getParameterValue("logToken"), bean.getLogToken());
assertEquals(query.getParameterValue("pending"), bean.getPending());
assertEquals(query.getParameterValue("pendingAge"), bean.getPendingAge());
assertEquals(query.getParameterValue("signalValue"), bean.getSignalValue());
assertEquals(query.getParameterValue("slaXml"), bean.getSlaXmlBlob());
assertEquals(query.getParameterValue("startTime"), bean.getStartTimestamp());
assertEquals(query.getParameterValue("status"), bean.getStatus().toString());
assertEquals(query.getParameterValue("wfId"), bean.getWfId());
assertEquals(query.getParameterValue("id"), bean.getId());
// UPDATE_ACTION_FOR_LAST_CHECKED_TIME
query =
WorkflowActionQueryExecutor.getInstance()
.getUpdateQuery(WorkflowActionQuery.UPDATE_ACTION, bean, em);
assertEquals(query.getParameterValue("lastCheckTime"), bean.getLastCheckTimestamp());
assertEquals(query.getParameterValue("id"), bean.getId());
// UPDATE_ACTION_PENDING
query =
WorkflowActionQueryExecutor.getInstance()
.getUpdateQuery(WorkflowActionQuery.UPDATE_ACTION_PENDING, bean, em);
assertEquals(query.getParameterValue("pending"), bean.getPending());
assertEquals(query.getParameterValue("pendingAge"), bean.getPendingAgeTimestamp());
assertEquals(query.getParameterValue("id"), bean.getId());
// UPDATE_ACTION_STATUS_PENDING
query =
WorkflowActionQueryExecutor.getInstance()
.getUpdateQuery(WorkflowActionQuery.UPDATE_ACTION_STATUS_PENDING, bean, em);
assertEquals(query.getParameterValue("pending"), bean.getPending());
assertEquals(query.getParameterValue("pendingAge"), bean.getPendingAgeTimestamp());
assertEquals(query.getParameterValue("status"), bean.getStatus().toString());
assertEquals(query.getParameterValue("id"), bean.getId());
// UPDATE_ACTION_PENDING_TRANS
query =
WorkflowActionQueryExecutor.getInstance()
.getUpdateQuery(WorkflowActionQuery.UPDATE_ACTION_PENDING_TRANS, bean, em);
assertEquals(query.getParameterValue("pending"), bean.getPending());
assertEquals(query.getParameterValue("pendingAge"), bean.getPendingAgeTimestamp());
assertEquals(query.getParameterValue("transition"), bean.getTransition());
assertEquals(query.getParameterValue("id"), bean.getId());
// UPDATE_ACTION_PENDING_TRANS_ERROR
query =
WorkflowActionQueryExecutor.getInstance()
.getUpdateQuery(WorkflowActionQuery.UPDATE_ACTION_PENDING_TRANS_ERROR, bean, em);
assertEquals(query.getParameterValue("pending"), bean.getPending());
assertEquals(query.getParameterValue("pendingAge"), bean.getPendingAgeTimestamp());
assertEquals(query.getParameterValue("transition"), bean.getTransition());
assertEquals(query.getParameterValue("errorCode"), bean.getErrorCode());
assertEquals(query.getParameterValue("errorMessage"), bean.getErrorMessage());
assertEquals(query.getParameterValue("id"), bean.getId());
// UPDATE_ACTION_START
query =
WorkflowActionQueryExecutor.getInstance()
.getUpdateQuery(WorkflowActionQuery.UPDATE_ACTION_START, bean, em);
assertEquals(query.getParameterValue("startTime"), bean.getStartTimestamp());
assertEquals(query.getParameterValue("externalChildIDs"), bean.getExternalChildIDsBlob());
assertEquals(query.getParameterValue("conf"), bean.getConfBlob());
assertEquals(query.getParameterValue("errorCode"), bean.getErrorCode());
assertEquals(query.getParameterValue("errorMessage"), bean.getErrorMessage());
assertEquals(query.getParameterValue("externalId"), bean.getExternalId());
assertEquals(query.getParameterValue("trackerUri"), bean.getTrackerUri());
assertEquals(query.getParameterValue("consoleUrl"), bean.getConsoleUrl());
assertEquals(query.getParameterValue("lastCheckTime"), bean.getLastCheckTimestamp());
assertEquals(query.getParameterValue("status"), bean.getStatus().toString());
assertEquals(query.getParameterValue("externalStatus"), bean.getExternalStatus());
assertEquals(query.getParameterValue("data"), bean.getDataBlob());
assertEquals(query.getParameterValue("retries"), bean.getRetries());
assertEquals(query.getParameterValue("pending"), bean.getPending());
assertEquals(query.getParameterValue("pendingAge"), bean.getPendingAgeTimestamp());
assertEquals(query.getParameterValue("userRetryCount"), bean.getUserRetryCount());
assertEquals(query.getParameterValue("id"), bean.getId());
// UPDATE_ACTION_CHECK
query =
WorkflowActionQueryExecutor.getInstance()
.getUpdateQuery(WorkflowActionQuery.UPDATE_ACTION_CHECK, bean, em);
assertEquals(query.getParameterValue("externalChildIDs"), bean.getExternalChildIDsBlob());
assertEquals(query.getParameterValue("externalStatus"), bean.getExternalStatus());
assertEquals(query.getParameterValue("status"), bean.getStatus().toString());
assertEquals(query.getParameterValue("data"), bean.getDataBlob());
assertEquals(query.getParameterValue("pending"), bean.getPending());
assertEquals(query.getParameterValue("errorCode"), bean.getErrorCode());
assertEquals(query.getParameterValue("errorMessage"), bean.getErrorMessage());
assertEquals(query.getParameterValue("lastCheckTime"), bean.getLastCheckTimestamp());
assertEquals(query.getParameterValue("retries"), bean.getRetries());
assertEquals(query.getParameterValue("pendingAge"), bean.getPendingAgeTimestamp());
assertEquals(query.getParameterValue("startTime"), bean.getStartTimestamp());
assertEquals(query.getParameterValue("stats"), bean.getStatsBlob());
assertEquals(query.getParameterValue("userRetryCount"), bean.getUserRetryCount());
assertEquals(query.getParameterValue("id"), bean.getId());
// UPDATE_ACTION_END
query =
WorkflowActionQueryExecutor.getInstance()
.getUpdateQuery(WorkflowActionQuery.UPDATE_ACTION_END, bean, em);
assertEquals(query.getParameterValue("errorCode"), bean.getErrorCode());
assertEquals(query.getParameterValue("errorMessage"), bean.getErrorMessage());
assertEquals(query.getParameterValue("retries"), bean.getRetries());
assertEquals(query.getParameterValue("endTime"), bean.getEndTimestamp());
assertEquals(query.getParameterValue("status"), bean.getStatus().toString());
assertEquals(query.getParameterValue("retries"), bean.getRetries());
assertEquals(query.getParameterValue("pending"), bean.getPending());
assertEquals(query.getParameterValue("pendingAge"), bean.getPendingAgeTimestamp());
assertEquals(query.getParameterValue("signalValue"), bean.getSignalValue());
assertEquals(query.getParameterValue("userRetryCount"), bean.getUserRetryCount());
assertEquals(query.getParameterValue("externalStatus"), bean.getExternalStatus());
assertEquals(query.getParameterValue("stats"), bean.getStatsBlob());
assertEquals(query.getParameterValue("id"), bean.getId());
em.close();
}
@Override
protected Void execute() throws CommandException {
LOG.debug("STARTED SignalCommand for jobid=" + jobId + ", actionId=" + actionId);
WorkflowInstance workflowInstance = wfJob.getWorkflowInstance();
workflowInstance.setTransientVar(WorkflowStoreService.WORKFLOW_BEAN, wfJob);
boolean completed = false;
boolean skipAction = false;
if (wfAction == null) {
if (wfJob.getStatus() == WorkflowJob.Status.PREP) {
try {
completed = workflowInstance.start();
} catch (WorkflowException e) {
throw new CommandException(e);
}
wfJob.setStatus(WorkflowJob.Status.RUNNING);
wfJob.setStartTime(new Date());
wfJob.setWorkflowInstance(workflowInstance);
// 1. Add SLA status event for WF-JOB with status STARTED
// 2. Add SLA registration events for all WF_ACTIONS
SLADbXOperations.writeStausEvent(
wfJob.getSlaXml(), jobId, Status.STARTED, SlaAppType.WORKFLOW_JOB);
writeSLARegistrationForAllActions(
workflowInstance.getApp().getDefinition(),
wfJob.getUser(),
wfJob.getGroup(),
wfJob.getConf());
queue(new NotificationXCommand(wfJob));
} else {
throw new CommandException(ErrorCode.E0801, wfJob.getId());
}
} else {
String skipVar =
workflowInstance.getVar(
wfAction.getName() + WorkflowInstance.NODE_VAR_SEPARATOR + ReRunCommand.TO_SKIP);
if (skipVar != null) {
skipAction = skipVar.equals("true");
}
try {
completed = workflowInstance.signal(wfAction.getExecutionPath(), wfAction.getSignalValue());
} catch (WorkflowException e) {
throw new CommandException(e);
}
wfJob.setWorkflowInstance(workflowInstance);
wfAction.resetPending();
if (!skipAction) {
wfAction.setTransition(workflowInstance.getTransition(wfAction.getName()));
}
try {
jpaService.execute(new WorkflowActionUpdateJPAExecutor(wfAction));
} catch (JPAExecutorException je) {
throw new CommandException(je);
}
}
if (completed) {
try {
for (String actionToKillId : WorkflowStoreService.getActionsToKill(workflowInstance)) {
WorkflowActionBean actionToKill;
actionToKill = jpaService.execute(new WorkflowActionGetJPAExecutor(actionToKillId));
actionToKill.setPending();
actionToKill.setStatus(WorkflowActionBean.Status.KILLED);
jpaService.execute(new WorkflowActionUpdateJPAExecutor(actionToKill));
queue(new ActionKillXCommand(actionToKill.getId(), actionToKill.getType()));
}
for (String actionToFailId : WorkflowStoreService.getActionsToFail(workflowInstance)) {
WorkflowActionBean actionToFail =
jpaService.execute(new WorkflowActionGetJPAExecutor(actionToFailId));
actionToFail.resetPending();
actionToFail.setStatus(WorkflowActionBean.Status.FAILED);
SLADbXOperations.writeStausEvent(
wfAction.getSlaXml(), wfAction.getId(), Status.FAILED, SlaAppType.WORKFLOW_ACTION);
jpaService.execute(new WorkflowActionUpdateJPAExecutor(actionToFail));
}
} catch (JPAExecutorException je) {
throw new CommandException(je);
}
wfJob.setStatus(WorkflowJob.Status.valueOf(workflowInstance.getStatus().toString()));
wfJob.setEndTime(new Date());
wfJob.setWorkflowInstance(workflowInstance);
Status slaStatus = Status.SUCCEEDED;
switch (wfJob.getStatus()) {
case SUCCEEDED:
slaStatus = Status.SUCCEEDED;
break;
case KILLED:
slaStatus = Status.KILLED;
break;
case FAILED:
slaStatus = Status.FAILED;
break;
default: // TODO SUSPENDED
break;
}
SLADbXOperations.writeStausEvent(
wfJob.getSlaXml(), jobId, slaStatus, SlaAppType.WORKFLOW_JOB);
queue(new NotificationXCommand(wfJob));
if (wfJob.getStatus() == WorkflowJob.Status.SUCCEEDED) {
InstrumentUtils.incrJobCounter(INSTR_SUCCEEDED_JOBS_COUNTER_NAME, 1, getInstrumentation());
}
} else {
for (WorkflowActionBean newAction :
WorkflowStoreService.getStartedActions(workflowInstance)) {
String skipVar =
workflowInstance.getVar(
newAction.getName() + WorkflowInstance.NODE_VAR_SEPARATOR + ReRunCommand.TO_SKIP);
boolean skipNewAction = false;
if (skipVar != null) {
skipNewAction = skipVar.equals("true");
}
try {
if (skipNewAction) {
WorkflowActionBean oldAction;
oldAction = jpaService.execute(new WorkflowActionGetJPAExecutor(newAction.getId()));
oldAction.setPending();
jpaService.execute(new WorkflowActionUpdateJPAExecutor(oldAction));
queue(new SignalXCommand(jobId, oldAction.getId()));
} else {
newAction.setPending();
String actionSlaXml =
getActionSLAXml(
newAction.getName(),
workflowInstance.getApp().getDefinition(),
wfJob.getConf());
newAction.setSlaXml(actionSlaXml);
jpaService.execute(new WorkflowActionInsertJPAExecutor(newAction));
LOG.debug(
"SignalXCommand: Name: "
+ newAction.getName()
+ ", Id: "
+ newAction.getId()
+ ", Authcode:"
+ newAction.getCred());
queue(new ActionStartXCommand(newAction.getId(), newAction.getType()));
}
} catch (JPAExecutorException je) {
throw new CommandException(je);
}
}
}
try {
jpaService.execute(new WorkflowJobUpdateJPAExecutor(wfJob));
} catch (JPAExecutorException je) {
throw new CommandException(je);
}
XLog.getLog(getClass())
.debug(
"Updated the workflow status to "
+ wfJob.getId()
+ " status ="
+ wfJob.getStatusStr());
if (wfJob.getStatus() != WorkflowJob.Status.RUNNING
&& wfJob.getStatus() != WorkflowJob.Status.SUSPENDED) {
// update coordinator action
new CoordActionUpdateXCommand(wfJob).call();
new WfEndXCommand(wfJob).call(); // To delete the WF temp dir
}
LOG.debug("ENDED SignalCommand for jobid=" + jobId + ", actionId=" + actionId);
return null;
}