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

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Here is the source code for io.druid.indexing.common.task.AbstractTask.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.Joiner;
import com.google.common.base.Objects;
import com.google.common.base.Preconditions;
import io.druid.indexing.common.TaskLock;
import io.druid.indexing.common.TaskStatus;
import io.druid.indexing.common.TaskToolbox;
import io.druid.indexing.common.actions.LockListAction;
import io.druid.query.Query;
import io.druid.query.QueryRunner;
import java.util.Map;
import org.joda.time.DateTime;
import org.joda.time.Interval;

import java.io.IOException;

public abstract class AbstractTask implements Task {
    private static final Joiner ID_JOINER = Joiner.on("_");

    @JsonIgnore
    private final String id;

    @JsonIgnore
    private final String groupId;

    @JsonIgnore
    private final TaskResource taskResource;

    @JsonIgnore
    private final String dataSource;

    private final Map<String, Object> context;

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

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

    protected AbstractTask(String id, String groupId, TaskResource taskResource, String dataSource,
            Map<String, Object> context) {
        this.id = Preconditions.checkNotNull(id, "id");
        this.groupId = Preconditions.checkNotNull(groupId, "groupId");
        this.taskResource = Preconditions.checkNotNull(taskResource, "resource");
        this.dataSource = Preconditions.checkNotNull(dataSource, "dataSource");
        this.context = context;
    }

    public static String makeId(String id, final String typeName, String dataSource, Interval interval) {
        return id != null ? id
                : joinId(typeName, dataSource, interval.getStart(), interval.getEnd(), new DateTime().toString());
    }

    @JsonProperty
    @Override
    public String getId() {
        return id;
    }

    @JsonProperty
    @Override
    public String getGroupId() {
        return groupId;
    }

    @JsonProperty("resource")
    @Override
    public TaskResource getTaskResource() {
        return taskResource;
    }

    @Override
    public String getNodeType() {
        return null;
    }

    @JsonProperty
    @Override
    public String getDataSource() {
        return dataSource;
    }

    @Override
    public <T> QueryRunner<T> getQueryRunner(Query<T> query) {
        return null;
    }

    @Override
    public String getClasspathPrefix() {
        return null;
    }

    @Override
    public String toString() {
        return Objects.toStringHelper(this).add("id", id).add("type", getType()).add("dataSource", dataSource)
                .toString();
    }

    /**
     * Start helper methods
     *
     * @param objects objects to join
     * @return string of joined objects
     */
    public static String joinId(Object... objects) {
        return ID_JOINER.join(objects);
    }

    public TaskStatus success() {
        return TaskStatus.success(getId());
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        AbstractTask that = (AbstractTask) o;

        if (!id.equals(that.id)) {
            return false;
        }

        return true;
    }

    @Override
    public int hashCode() {
        return id.hashCode();
    }

    protected Iterable<TaskLock> getTaskLocks(TaskToolbox toolbox) throws IOException {
        return toolbox.getTaskActionClient().submit(new LockListAction());
    }

    @Override
    @JsonProperty
    public Map<String, Object> getContext() {
        return context;
    }

    @Override
    public Object getContextValue(String key) {
        return context == null ? null : context.get(key);
    }

}