com.uber.cadence.internal.replay.ActivityDecisionStateMachine Maven / Gradle / Ivy
/*
* Copyright 2012-2016 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Modifications copyright (C) 2017 Uber Technologies, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"). You may not
* use this file except in compliance with the License. A copy of the License is
* located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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 com.uber.cadence.internal.replay;
import com.uber.cadence.Decision;
import com.uber.cadence.DecisionType;
import com.uber.cadence.HistoryEvent;
import com.uber.cadence.RequestCancelActivityTaskDecisionAttributes;
import com.uber.cadence.ScheduleActivityTaskDecisionAttributes;
final class ActivityDecisionStateMachine extends DecisionStateMachineBase {
private ScheduleActivityTaskDecisionAttributes scheduleAttributes;
public ActivityDecisionStateMachine(
DecisionId id, ScheduleActivityTaskDecisionAttributes scheduleAttributes) {
super(id);
this.scheduleAttributes = scheduleAttributes;
}
/** Used for unit testing */
ActivityDecisionStateMachine(
DecisionId id,
ScheduleActivityTaskDecisionAttributes scheduleAttributes,
DecisionState state) {
super(id, state);
this.scheduleAttributes = scheduleAttributes;
}
@Override
public Decision getDecision() {
switch (state) {
case CREATED:
return createScheduleActivityTaskDecision();
case CANCELED_AFTER_INITIATED:
return createRequestCancelActivityTaskDecision();
default:
return null;
}
}
@Override
public void handleDecisionTaskStartedEvent() {
switch (state) {
case CANCELED_AFTER_INITIATED:
stateHistory.add("handleDecisionTaskStartedEvent");
state = DecisionState.CANCELLATION_DECISION_SENT;
stateHistory.add(state.toString());
break;
default:
super.handleDecisionTaskStartedEvent();
}
}
@Override
public void handleCancellationFailureEvent(HistoryEvent event) {
switch (state) {
case CANCELLATION_DECISION_SENT:
stateHistory.add("handleCancellationFailureEvent");
state = DecisionState.INITIATED;
stateHistory.add(state.toString());
break;
default:
super.handleCancellationFailureEvent(event);
}
}
private Decision createRequestCancelActivityTaskDecision() {
RequestCancelActivityTaskDecisionAttributes tryCancel =
new RequestCancelActivityTaskDecisionAttributes();
tryCancel.setActivityId(scheduleAttributes.getActivityId());
Decision decision = new Decision();
decision.setRequestCancelActivityTaskDecisionAttributes(tryCancel);
decision.setDecisionType(DecisionType.RequestCancelActivityTask);
return decision;
}
private Decision createScheduleActivityTaskDecision() {
Decision decision = new Decision();
decision.setScheduleActivityTaskDecisionAttributes(scheduleAttributes);
decision.setDecisionType(DecisionType.ScheduleActivityTask);
return decision;
}
}
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