/*
* Copyright 2018 LinkedIn Corp.
*
* 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 azkaban.dag;
public interface NodeProcessor {
/**
* Changes the status of the node.
*
* <p>Typically a processor implementation should handle the RUNNING and KILLING status by
* starting or killing a unit of work and call the {@link DagService} to transition the node
* to the next status.
*
* <p>The call will be made in the context of the DagService's one and only thread. Thus a
* processor should limit the time it takes to process the call. For lengthy operations such as
* I/O operations, consider offloading them to other threads.
*
* @param node the node to change
* @param status the new status
*/
void changeStatus(Node node, Status status);
}