BatchPipelineSpecGenerator.java

/*
 * Copyright © 2016 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 co.cask.cdap.etl.batch;

import co.cask.cdap.api.dataset.Dataset;
import co.cask.cdap.api.dataset.DatasetProperties;
import co.cask.cdap.api.plugin.PluginConfigurer;
import co.cask.cdap.etl.api.PipelineConfigurer;
import co.cask.cdap.etl.common.DefaultPipelineConfigurer;
import co.cask.cdap.etl.proto.v2.ETLBatchConfig;
import co.cask.cdap.etl.proto.v2.ETLStage;
import co.cask.cdap.etl.spec.PipelineSpecGenerator;
import co.cask.cdap.etl.spec.PluginSpec;

import java.util.Set;

/**
 * Generates a pipeline spec for batch apps.
 */
public class BatchPipelineSpecGenerator extends PipelineSpecGenerator<ETLBatchConfig, BatchPipelineSpec> {

  public BatchPipelineSpecGenerator(PluginConfigurer configurer,
                                    Set<String> sourcePluginTypes,
                                    Set<String> sinkPluginTypes,
                                    Class<? extends Dataset> errorDatasetClass,
                                    DatasetProperties errorDatasetProperties) {
    super(configurer, sourcePluginTypes, sinkPluginTypes, errorDatasetClass, errorDatasetProperties);
  }

  @Override
  public BatchPipelineSpec generateSpec(ETLBatchConfig config) {
    BatchPipelineSpec.Builder specBuilder = BatchPipelineSpec.builder();

    for (ETLStage endingAction : config.getPostActions()) {
      String name = endingAction.getName();
      PipelineConfigurer pipelineConfigurer = new DefaultPipelineConfigurer(configurer, name);
      PluginSpec pluginSpec = configurePlugin(endingAction.getName(), endingAction.getPlugin(), pipelineConfigurer);
      specBuilder.addAction(new ActionSpec(name, pluginSpec));
    }

    configureStages(config, specBuilder);
    return specBuilder.build();
  }
}