com.produban.openbus.processor.function.PersistenceHDFS.java Source code

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Here is the source code for com.produban.openbus.processor.function.PersistenceHDFS.java

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/*
* Copyright 2013 Produban
*
* 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.produban.openbus.processor.function;

import java.io.File;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Map;

import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import storm.trident.operation.BaseFunction;
import storm.trident.operation.TridentCollector;
import storm.trident.operation.TridentOperationContext;
import storm.trident.tuple.TridentTuple;
import backtype.storm.tuple.Values;

import com.produban.openbus.processor.hdfs.HDFSStore;
import com.produban.openbus.processor.util.FormatUtil;

/**
 * Function Storm/Trident persistence in HDFS   
 */
public class PersistenceHDFS extends BaseFunction {
    private static final long serialVersionUID = -3967587213225365514L;
    private static Logger LOG = LoggerFactory.getLogger(PersistenceHDFS.class);

    private HDFSStore hDFSStore;

    @Override
    @SuppressWarnings("rawtypes")
    public void prepare(Map conf, TridentOperationContext context) {
        hDFSStore = new HDFSStore();
    }

    @Override
    public final void execute(final TridentTuple tuple, final TridentCollector collector) {
        String json = null;
        try {
            json = (String) tuple.getStringByField("json");
            String datetimeInHour = FormatUtil.getDateFormat(tuple.getStringByField("datetime"),
                    FormatUtil.DATE_FORMAT_WEBSERVER, FormatUtil.DATE_FORMAT_HOUR);

            hDFSStore.writeFile2HDFS(
                    datetimeInHour + File.separator + "wslog" + "_" + datetimeInHour + "_" + System.nanoTime(),
                    json);

            collector.emit(new Values(json));
        } catch (Exception e) {
            LOG.error("Persistence HDFS: " + json, e);
        }
    }
}