org.apache.crunch.impl.mr.run.CrunchTaskContext.java Source code

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Here is the source code for org.apache.crunch.impl.mr.run.CrunchTaskContext.java

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/**
 * 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.crunch.impl.mr.run;

import java.io.IOException;
import java.util.List;

import org.apache.crunch.CrunchRuntimeException;
import org.apache.crunch.impl.mr.plan.PlanningParameters;
import org.apache.crunch.io.CrunchOutputs;
import org.apache.crunch.util.DistCache;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.TaskInputOutputContext;

class CrunchTaskContext {

    private final TaskInputOutputContext<Object, Object, Object, Object> taskContext;
    private final NodeContext nodeContext;
    private final List<RTNode> nodes;
    private CrunchOutputs<Object, Object> multipleOutputs;

    public CrunchTaskContext(TaskInputOutputContext<Object, Object, Object, Object> taskContext,
            NodeContext nodeContext) {
        this.taskContext = taskContext;
        this.nodeContext = nodeContext;
        Configuration conf = taskContext.getConfiguration();
        Path path = new Path(new Path(conf.get(PlanningParameters.CRUNCH_WORKING_DIRECTORY)),
                nodeContext.toString());
        try {
            this.nodes = (List<RTNode>) DistCache.read(conf, path);
        } catch (IOException e) {
            throw new CrunchRuntimeException("Could not read runtime node information", e);
        }
    }

    public TaskInputOutputContext<Object, Object, Object, Object> getContext() {
        return taskContext;
    }

    public NodeContext getNodeContext() {
        return nodeContext;
    }

    public List<RTNode> getNodes() {
        return nodes;
    }

    public boolean isDebugRun() {
        Configuration conf = taskContext.getConfiguration();
        return conf.getBoolean(RuntimeParameters.DEBUG, false);
    }

    public void cleanup() {
        if (multipleOutputs != null) {
            try {
                multipleOutputs.close();
            } catch (IOException e) {
                throw new CrunchRuntimeException(e);
            } catch (InterruptedException e) {
                throw new CrunchRuntimeException(e);
            }
        }
    }

    public CrunchOutputs<Object, Object> getMultipleOutputs() {
        if (multipleOutputs == null) {
            multipleOutputs = new CrunchOutputs<Object, Object>(taskContext);
        }
        return multipleOutputs;
    }
}