io.druid.indexing.common.task.AbstractFixedIntervalTask.java Source code

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Here is the source code for io.druid.indexing.common.task.AbstractFixedIntervalTask.java

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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<String, Object> context) {
        this(id, id, new TaskResource(id, 1), dataSource, interval, context);
    }

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

    protected AbstractFixedIntervalTask(String id, String groupId, TaskResource taskResource, String dataSource,
            Interval interval, Map<String, Object> 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;
    }
}