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/*
* Licensed to Metamarkets Group Inc. (Metamarkets) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. Metamarkets licenses this file
* to you 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.TaskLockType;
import io.druid.indexing.common.actions.LockTryAcquireAction;
import io.druid.indexing.common.actions.TaskActionClient;
import org.joda.time.Interval;
import java.util.Map;
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,
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(TaskLockType.EXCLUSIVE, interval)) != null;
}
@JsonProperty
public Interval getInterval()
{
return interval;
}
}
