io.druid.indexing.common.task.AbstractFixedIntervalTask Maven / Gradle / Ivy

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/*
 * Druid - a distributed column store.
 * Copyright 2012 - 2015 Metamarkets Group 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.druid.indexing.common.task;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Preconditions;
import io.druid.indexing.common.actions.LockTryAcquireAction;
import io.druid.indexing.common.actions.TaskActionClient;
import java.util.Map;
import org.joda.time.Interval;

public abstract class AbstractFixedIntervalTask extends AbstractTask
{
  @JsonIgnore
  private final Interval interval;

  protected AbstractFixedIntervalTask(
      String id,
      String dataSource,
      Interval interval,
      Map context
  )
  {
    this(id, id, new TaskResource(id, 1), dataSource, interval, context);
  }

  protected AbstractFixedIntervalTask(
      String id,
      TaskResource taskResource,
      String dataSource,
      Interval interval,
      Map context
  )
  {
    this(
        id,
        id,
        taskResource == null ? new TaskResource(id, 1) : taskResource,
        dataSource,
        interval,
        context
    );
  }

  protected AbstractFixedIntervalTask(
      String id,
      String groupId,
      String dataSource,
      Interval interval,
      Map context
  )
  {
    this(id, groupId, new TaskResource(id, 1), dataSource, interval, context);
  }

  protected AbstractFixedIntervalTask(
      String id,
      String groupId,
      TaskResource taskResource,
      String dataSource,
      Interval interval,
      Map context
  )
  {
    super(id, groupId, taskResource, dataSource, context);
    this.interval = Preconditions.checkNotNull(interval, "interval");
    Preconditions.checkArgument(interval.toDurationMillis() > 0, "interval empty");
  }

  @Override
  public boolean isReady(TaskActionClient taskActionClient) throws Exception
  {
    return taskActionClient.submit(new LockTryAcquireAction(interval)).isPresent();
  }

  @JsonProperty
  public Interval getInterval()
  {
    return interval;
  }
}