com.datatorrent.demos.mapreduce.MRDebuggerApplication.java Source code

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Here is the source code for com.datatorrent.demos.mapreduce.MRDebuggerApplication.java

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/*
 * Copyright (c) 2013 DataTorrent, Inc. ALL Rights Reserved.
 *
 * 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 com.datatorrent.demos.mapreduce;

import java.net.URI;

import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.datatorrent.api.DAG;
import com.datatorrent.api.StreamingApplication;
import com.datatorrent.lib.io.PubSubWebSocketInputOperator;
import com.datatorrent.lib.io.PubSubWebSocketOutputOperator;

/**
 * <p>MRDebuggerApplication class.</p>
 *
 * @since 0.3.4
 */
public class MRDebuggerApplication implements StreamingApplication {

    private static final Logger LOG = LoggerFactory.getLogger(MRDebuggerApplication.class);

    @Override
    public void populateDAG(DAG dag, Configuration arg1) {
        String daemonAddress = dag.attrValue(DAG.DAEMON_ADDRESS, null);
        if (daemonAddress == null || StringUtils.isEmpty(daemonAddress)) {
            daemonAddress = "10.0.2.15:9790";
        }
        MRJobStatusOperator mrJobOperator = dag.addOperator("mrJobStatusOperator", new MRJobStatusOperator());

        URI uri = URI.create("ws://" + daemonAddress + "/pubsub");
        LOG.info("WebSocket with daemon at: {}", daemonAddress);

        PubSubWebSocketInputOperator wsIn = dag.addOperator("mrDebuggerQueryWS",
                new PubSubWebSocketInputOperator());
        wsIn.setUri(uri);
        wsIn.addTopic("contrib.summit.mrDebugger.mrDebuggerQuery");

        dag.addStream("query", wsIn.outputPort, mrJobOperator.input);

        PubSubWebSocketOutputOperator<Object> wsOut = dag.addOperator("mrDebuggerJobResultWS",
                new PubSubWebSocketOutputOperator<Object>());
        wsOut.setUri(uri);
        wsOut.setTopic("contrib.summit.mrDebugger.jobResult");

        PubSubWebSocketOutputOperator<Object> wsMapOut = dag.addOperator("mrDebuggerMapResultWS",
                new PubSubWebSocketOutputOperator<Object>());
        wsMapOut.setUri(uri);
        wsMapOut.setTopic("contrib.summit.mrDebugger.mapResult");

        PubSubWebSocketOutputOperator<Object> wsReduceOut = dag.addOperator("mrDebuggerReduceResultWS",
                new PubSubWebSocketOutputOperator<Object>());
        wsReduceOut.setUri(uri);
        wsReduceOut.setTopic("contrib.summit.mrDebugger.reduceResult");

        dag.addStream("jobConsoledata", mrJobOperator.output, wsOut.input);
        dag.addStream("mapConsoledata", mrJobOperator.mapOutput, wsMapOut.input);
        dag.addStream("reduceConsoledata", mrJobOperator.reduceOutput, wsReduceOut.input);

    }

}