AppWithSchedule.java

/*
 * Copyright © 2014-2015 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;

import co.cask.cdap.api.app.AbstractApplication;
import co.cask.cdap.api.data.schema.UnsupportedTypeException;
import co.cask.cdap.api.dataset.lib.ObjectStores;
import co.cask.cdap.api.schedule.Schedules;
import co.cask.cdap.api.workflow.AbstractWorkflow;
import co.cask.cdap.api.workflow.AbstractWorkflowAction;
import com.google.common.base.Preconditions;
import com.google.common.base.Throwables;
import com.google.common.collect.Maps;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Map;

/**
 * Application with workflow scheduling.
 */
public class AppWithSchedule extends AbstractApplication {

  @Override
  public void configure() {
    try {
      setName("AppWithSchedule");
      setDescription("Sample application");
      ObjectStores.createObjectStore(getConfigurer(), "input", String.class);
      ObjectStores.createObjectStore(getConfigurer(), "output", String.class);
      addWorkflow(new SampleWorkflow());

      Map<String, String> scheduleProperties = Maps.newHashMap();
      scheduleProperties.put("oneKey", "oneValue");
      scheduleProperties.put("anotherKey", "anotherValue");
      scheduleProperties.put("someKey", "someValue");

      scheduleWorkflow(Schedules.builder("SampleSchedule")
                         .setDescription("Sample schedule")
                         .createTimeSchedule("0/15 * * * * ?"),
                       "SampleWorkflow",
                       scheduleProperties);
    } catch (UnsupportedTypeException e) {
      throw Throwables.propagate(e);
    }
  }

  /**
   * Sample workflow. Schedules a dummy MR job.
   */
  public static class SampleWorkflow extends AbstractWorkflow {

    @Override
    public void configure() {
        setName("SampleWorkflow");
        setDescription("SampleWorkflow description");
        addAction(new DummyAction());
    }
  }

  /**
   * DummyAction
   */
  public static class DummyAction extends AbstractWorkflowAction {
    private static final Logger LOG = LoggerFactory.getLogger(DummyAction.class);
    @Override
    public void run() {
      Preconditions.checkArgument(getContext().getRuntimeArguments().get("oneKey").equals("oneValue"));
      Preconditions.checkArgument(getContext().getRuntimeArguments().get("anotherKey").equals("anotherValue"));
      Preconditions.checkArgument(getContext().getRuntimeArguments().get("someKey").equals("someWorkflowValue"));
      Preconditions.checkArgument(getContext().getRuntimeArguments().get("workflowKey").equals("workflowValue"));
      LOG.info("Ran dummy action");
    }
  }
}