// Cancel paused run according to its branches state
// If the run has branches, (it can be branch-paused / user-paused / no-workers-in-group) -
// then it's a 'virtual' pause, and we should cancel the paused branches. Then, the run itself
// will be canceled as well.
// If it doesn't - just cancel it straight away - extract the Run Object, set its context
// accordingly and put into the queue.
private void cancelPausedRun(ExecutionState executionStateToCancel) {
final List<ExecutionState> branches =
executionStateService.readByExecutionId(executionStateToCancel.getExecutionId());
// If the parent is paused because one of the branches is paused, OR, it was paused by the user
// / no-workers-in-group, but has branches that were not finished (and thus, were paused) -
// The parent itself will return to the queue after all the branches are ended (due to this
// cancellation), and then it'll be canceled as well.
if (branches.size()
> 1) { // more than 1 means that it has paused branches (branches is at least 1 - the
// parent)
for (ExecutionState branch : branches) {
if (!EMPTY_BRANCH.equals(branch.getBranchId())) { // exclude the base execution
returnCanceledRunToQueue(branch);
executionStateService.deleteExecutionState(branch.getExecutionId(), branch.getBranchId());
}
}
executionStateToCancel.setStatus(
ExecutionStatus
.PENDING_CANCEL); // when the parent will return to queue - should have the correct
// status
} else {
returnCanceledRunToQueue(executionStateToCancel);
}
}
private void returnCanceledRunToQueue(ExecutionState executionStateToCancel) {
// set the context and return the run to the queue. It will be handled on "finishFlow"
// (QueueEventListener).
Execution executionObj =
executionSerializationUtil.objFromBytes(executionStateToCancel.getExecutionObject());
if (executionObj == null) {
logger.error(
"Run Object is null. Execution Id = "
+ executionStateToCancel.getExecutionId()
+ "; Branch Id = "
+ executionStateToCancel.getBranchId());
return;
}
executionObj.getSystemContext().setFlowTerminationType(ExecutionStatus.CANCELED);
executionObj.setPosition(null);
// just in case - we shouldn't need it, because the Execution is back to the queue as
// "Terminated"
executionStateToCancel.setStatus(ExecutionStatus.PENDING_CANCEL);
// clean the DB field
executionStateToCancel.setExecutionObject(null);
// return execution to queue, as "Terminated"
queueDispatcherService.dispatch(
String.valueOf(executionObj.getExecutionId()),
executionObj.getGroupName(),
ExecStatus.TERMINATED,
executionMessageConverter.createPayload(executionObj));
}
private ExecutionState createExecutionState(ExecutionStatus status) {
ExecutionState executionState = new ExecutionState();
executionState.setStatus(status);
executionState.setExecutionId(123L);
executionState.setBranchId(UUID.randomUUID().toString());
executionStateRepository.saveAndFlush(executionState);
return executionState;
}
@Override
@Transactional
public ExecutionActionResult requestCancelExecution(Long executionId) {
if (logger.isDebugEnabled()) {
logger.debug("Cancelling Execution Id: " + executionId);
}
if (executionId == null) {
throw new IllegalArgumentException(
"Null is not allowed as input of execution id in cancelExecution()");
}
ExecutionState executionStateToCancel =
executionStateService.readByExecutionIdAndBranchId(executionId, EMPTY_BRANCH);
// we must have such execution in the table - the record is created on execution triggering
if (executionStateToCancel == null) {
String errMsg = "Failed to cancel execution. Execution id: " + executionId + ".";
logger.error(errMsg);
return ExecutionActionResult.FAILED_NOT_FOUND;
}
ExecutionStatus status = executionStateToCancel.getStatus();
if (status.equals(ExecutionStatus.CANCELED) || status.equals(ExecutionStatus.PENDING_CANCEL)) {
return ExecutionActionResult.FAILED_ALREADY_CANCELED_OR_PENDING_CANCELLATION;
}
// it's possible to cancel only running or paused executions.
// If it's running - set to pending-cancel, and the ExecutionServiceImpl will handle it and
// extract it from the queue.
// If it's paused - sometimes needs to handle its branches (if such exists).
if (status.equals(ExecutionStatus.RUNNING)) {
executionStateToCancel.setStatus(ExecutionStatus.PENDING_CANCEL);
} else if (status.equals(ExecutionStatus.PAUSED)) {
cancelPausedRun(executionStateToCancel);
} else {
String errMsg =
"Failed to cancel execution. Execution id: "
+ executionId
+ ". Execution is in status: "
+ executionStateToCancel.getStatus().name();
logger.error(errMsg);
return ExecutionActionResult.getExecutionActionResult(status);
}
return ExecutionActionResult.SUCCESS;
}