Examples of com.amazonaws.services.simpleworkflow.flow.core.ExternalTaskCompletionHandle

Package com.amazonaws.services.simpleworkflow.flow.core

Examples of com.amazonaws.services.simpleworkflow.flow.core.ExternalTaskCompletionHandle

com.amazonaws.services.simpleworkflow.flow.core.ExternalTaskCompletionHandle
Used to complete or fail an external task initiated through {@link ExternalTask#doExecute(ExternalTaskCompletionHandle)}.
Flow framework is not thread safe and expects that all asynchronous code is executed in a single thread. Currently ExternalTaskCompletionHandle is the only exception as it allows {@link #complete()} and {@link #fail(Throwable)}be called from other threads. @author fateev

        String activityId = decisions.getActivityId(attributes);
        if (decisions.handleActivityTaskCanceled(event)) {
            CancellationException e = new CancellationException();
            OpenRequestInfo<String, ActivityType> scheduled = scheduledActivities.remove(activityId);
            if (scheduled != null) {
                ExternalTaskCompletionHandle completionHandle = scheduled.getCompletionHandle();
                // It is OK to fail with subclass of CancellationException when cancellation requested.
                // It allows passing information about cancellation (details in this case) to the surrounding doCatch block
                completionHandle.fail(e);
            }
        }
    }

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        OpenRequestInfo<String, ActivityType> scheduled = scheduledActivities.remove(activityId);
        if (decisions.handleScheduleActivityTaskFailed(event)) {
            String cause = attributes.getCause();
            ScheduleActivityTaskFailedException failure = new ScheduleActivityTaskFailedException(event.getEventId(),
                    attributes.getActivityType(), activityId, cause);
            ExternalTaskCompletionHandle completionHandle = scheduled.getCompletionHandle();
            completionHandle.fail(failure);
        }
    }

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        if (decisions.handleActivityTaskClosed(activityId)) {
            OpenRequestInfo<String, ActivityType> scheduled = scheduledActivities.remove(activityId);
            if (scheduled != null) {
                String result = attributes.getResult();
                scheduled.getResult().set(result);
                ExternalTaskCompletionHandle completionHandle = scheduled.getCompletionHandle();
                completionHandle.complete();
            }
        }
    }

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            if (scheduled != null) {
                String reason = attributes.getReason();
                String details = attributes.getDetails();
                ActivityTaskFailedException failure = new ActivityTaskFailedException(event.getEventId(),
                        scheduled.getUserContext(), activityId, reason, details);
                ExternalTaskCompletionHandle completionHandle = scheduled.getCompletionHandle();
                completionHandle.fail(failure);
            }
        }
    }

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            if (scheduled != null) {
                String timeoutType = attributes.getTimeoutType();
                String details = attributes.getDetails();
                ActivityTaskTimedOutException failure = new ActivityTaskTimedOutException(event.getEventId(),
                        scheduled.getUserContext(), activityId, timeoutType, details);
                ExternalTaskCompletionHandle completionHandle = scheduled.getCompletionHandle();
                completionHandle.fail(failure);
            }
        }
    }

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    void handleTimerFired(Long eventId, TimerFiredEventAttributes attributes) {
        String timerId = attributes.getTimerId();
        if (decisions.handleTimerClosed(timerId)) {
            OpenRequestInfo scheduled = scheduledTimers.remove(timerId);
            if (scheduled != null) {
                ExternalTaskCompletionHandle completionHandle = scheduled.getCompletionHandle();
                scheduled.getResult().set(scheduled.getUserContext());
                completionHandle.complete();
            }
        }
        else {
            log.debug("handleTimerFired not complete");
        }

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        StartTimerFailedEventAttributes attributes = event.getStartTimerFailedEventAttributes();
        String timerId = attributes.getTimerId();
        if (decisions.handleStartTimerFailed(event)) {
            OpenRequestInfo scheduled = scheduledTimers.remove(timerId);
            if (scheduled != null) {
                ExternalTaskCompletionHandle completionHandle = scheduled.getCompletionHandle();
                Object createTimerUserContext = scheduled.getUserContext();
                String cause = attributes.getCause();
                Throwable failure = new StartTimerFailedException(event.getEventId(), timerId, createTimerUserContext, cause);
                completionHandle.fail(failure);
            }
        }
        else {
            log.debug("handleStartTimerFailed not complete");
        }

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        TimerCanceledEventAttributes attributes = event.getTimerCanceledEventAttributes();
        String timerId = attributes.getTimerId();
        if (decisions.handleTimerCanceled(event)) {
            OpenRequestInfo<?, ?> scheduled = scheduledTimers.remove(timerId);
            if (scheduled != null) {
                ExternalTaskCompletionHandle completionHandle = scheduled.getCompletionHandle();
                CancellationException exception = new CancellationException();
                completionHandle.fail(exception);
            }
        }
        else {
            log.debug("handleTimerCanceled not complete");
        }

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            decisions.cancelTimer(timerId, new Runnable() {


                @Override
                public void run() {
                    OpenRequestInfo<?, ?> scheduled = scheduledTimers.remove(timerId);
                    ExternalTaskCompletionHandle context = scheduled.getCompletionHandle();
                    context.complete();
                }
            });
        }

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        String workflowId = execution.getWorkflowId();
        if (decisions.handleChildWorkflowExecutionCanceled(workflowId)) {
            OpenRequestInfo<StartChildWorkflowReply, WorkflowType> scheduled = scheduledExternalWorkflows.remove(workflowId);
            if (scheduled != null) {
                CancellationException e = new CancellationException();
                ExternalTaskCompletionHandle completionHandle = scheduled.getCompletionHandle();
                // It is OK to fail with subclass of CancellationException when cancellation requested.
                // It allows passing information about cancellation (details in this case) to the surrounding doCatch block
                completionHandle.fail(e);
            }
        }
    }

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