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

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

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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.google.common.base.Preconditions;

import javax.annotation.Nullable;
import java.util.Map;

public class TaskLabels {
    public static final String TASK_LABEL_FIELD = "label";

    @Nullable
    public static String getTaskLabel(Task task) {
        Preconditions.checkNotNull(task, "task");
        Map<String, Object> context = task.getContext();
        Object taskLabel = (context != null) ? context.get(TASK_LABEL_FIELD) : null;
        return taskLabel == null ? null : (String) taskLabel;
    }
}