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ResultType.java
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/*
* Copyright 2012 LinkedIn, Inc
*
* 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 com.linkedin.parseq.trace;
import com.linkedin.parseq.EarlyFinishException;
import com.linkedin.parseq.Task;
/**
* An enumeration that classifies the state of a Task.
*
* @author Chris Pettitt (cpettitt@linkedin.com)
*/
public enum ResultType
{
/**
* Indicates that the task completed without error.
*/
SUCCESS,
/**
* Indicates that the task completed with an error.
*/
ERROR,
/**
* Indicates that the task was cancelled because it's parent was resolved
* before the task itself was resolved.
*/
EARLY_FINISH,
/**
* Indicates that the task has not yet been resolved.
*/
UNFINISHED;
/**
* Given a task this method will return a {@link ResultType} classification.
*
* @param task the task to classify
* @return the result type classification for the task
*/
public static ResultType fromTask(final Task<?> task)
{
if (!task.isDone())
{
return UNFINISHED;
}
else if (task.isFailed())
{
if (task.getError() instanceof EarlyFinishException)
{
return EARLY_FINISH;
}
return ERROR;
}
return SUCCESS;
}
}