io.cdap.cdap.app.runtime.WorkflowDataProvider Maven / Gradle / Ivy
/*
* Copyright © 2016-2018 Cask Data, 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 io.cdap.cdap.app.runtime;
import io.cdap.cdap.api.lineage.field.Operation;
import io.cdap.cdap.api.workflow.WorkflowToken;
import java.util.Set;
/**
* An interface for classes that can provide data required for the execution of the workflow.
* This interface is implemented by controllers of the programs which can possibly run inside the Workflow,
* such as MapReduce and Spark. If these programs were executed as a part of Workflow, then Workflow driver
* can call these methods to get the data which need to be passed along the further stages in the Workflow.
*/
public interface WorkflowDataProvider {
/**
* Returns a {@link WorkflowToken}.
*/
WorkflowToken getWorkflowToken();
/**
* Returns set of field lineage {@link Operation}s.
*/
Set getFieldLineageOperations();
}