external/storm-hbase/src/test/java/org/apache/storm/hbase/topology/WordCountClient.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.storm.hbase.topology;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.util.Bytes;

/**
 * Connects to the 'WordCount' table and prints counts for each word.
 *
 * Assumes you have run (or are running) <code>PersistentWordCount</code>
 */
public class WordCountClient {

    public static void main(String[] args) throws Exception {
        Configuration config = HBaseConfiguration.create();
        if(args.length > 0){
            config.set("hbase.rootdir", args[0]);
        }

        HTable table = new HTable(config, "WordCount");


        for (String word : WordSpout.words) {
            Get get = new Get(Bytes.toBytes(word));
            Result result = table.get(get);

            byte[] countBytes = result.getValue(Bytes.toBytes("cf"), Bytes.toBytes("count"));
            byte[] wordBytes = result.getValue(Bytes.toBytes("cf"), Bytes.toBytes("word"));

            String wordStr = Bytes.toString(wordBytes);
            System.out.println(wordStr);
            long count = Bytes.toLong(countBytes);
            System.out.println("Word: '" + wordStr + "', Count: " + count);
        }

    }
}