src/org/apache/pig/backend/hadoop/executionengine/mapReduceLayer/MRTaskContext.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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 org.apache.pig.backend.hadoop.executionengine.mapReduceLayer;

import org.apache.hadoop.mapreduce.Counter;
import org.apache.hadoop.mapreduce.TaskInputOutputContext;
import org.apache.pig.backend.hadoop.executionengine.TaskContext;

public class MRTaskContext extends TaskContext<TaskInputOutputContext<?,?,?,?>> {
    private TaskInputOutputContext<?,?,?,?> context;

    public MRTaskContext(TaskInputOutputContext<?,?,?,?> context) {
        this.context = context;
    }

    @Override
    public TaskInputOutputContext<?,?,?,?> get() {
        return context;
    }

    @Override
    public Counter getCounter(Enum<?> name) {
        if (context == null) {
            return null;
        }
        return context.getCounter(name);
    }

    @Override
    public Counter getCounter(String group, String name) {
        if (context == null) {
            return null;
        }
        return context.getCounter(group, name);
    }

    @Override
    public boolean incrCounter(Enum<?> name, long delta) {
        if (context == null) {
            return false;
        }
        Counter counter = context.getCounter(name);
        counter.increment(delta);
        return true;
    }

    @Override
    public boolean incrCounter(String group, String name, long delta) {
        if (context == null) {
            return false;
        }
        Counter counter = context.getCounter(group, name);
        counter.increment(delta);
        return true;
    }

    public void progress() {
        if (context == null) {
            return;
        }
        context.progress();
    }

    public void setStatus(String status) {
        if (context == null) {
            return;
        }
        context.setStatus(status);
    }
}