co.cask.cdap.internal.app.runtime.batch.stream.MapReduceStreamInputFormat.java Source code

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Here is the source code for co.cask.cdap.internal.app.runtime.batch.stream.MapReduceStreamInputFormat.java

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/*
 * Copyright  2016 Cask Data, 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 co.cask.cdap.internal.app.runtime.batch.stream;

import co.cask.cdap.api.mapreduce.MapReduce;
import co.cask.cdap.data.stream.AbstractStreamInputFormat;
import co.cask.cdap.internal.app.runtime.batch.BasicMapReduceTaskContext;
import co.cask.cdap.internal.app.runtime.batch.MapReduceClassLoader;
import co.cask.cdap.security.spi.authentication.AuthenticationContext;
import co.cask.cdap.security.spi.authorization.AuthorizationEnforcer;
import org.apache.hadoop.mapreduce.TaskAttemptContext;

/**
 * StreamInputFormat for {@link MapReduce} jobs.
 *
 * @param <K> Key type of input
 * @param <V> Value type of input
 */
public class MapReduceStreamInputFormat<K, V> extends AbstractStreamInputFormat<K, V> {

    @Override
    public AuthorizationEnforcer getAuthorizationEnforcer(TaskAttemptContext context) {
        return getMapReduceTaskContext(context).getAuthorizationEnforcer();
    }

    @Override
    public AuthenticationContext getAuthenticationContext(TaskAttemptContext context) {
        return getMapReduceTaskContext(context).getAuthenticationContext();
    }

    private BasicMapReduceTaskContext getMapReduceTaskContext(TaskAttemptContext context) {
        MapReduceClassLoader classLoader = MapReduceClassLoader.getFromConfiguration(context.getConfiguration());
        return classLoader.getTaskContextProvider().get(context);
    }
}