/**
 * 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.hive.bolt;

import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;

import org.apache.storm.Config;
import org.apache.storm.StormSubmitter;
import org.apache.storm.hive.bolt.mapper.DelimitedRecordHiveMapper;
import org.apache.storm.hive.common.HiveOptions;
import org.apache.storm.spout.SpoutOutputCollector;
import org.apache.storm.task.TopologyContext;
import org.apache.storm.topology.OutputFieldsDeclarer;
import org.apache.storm.topology.TopologyBuilder;
import org.apache.storm.topology.base.BaseRichSpout;
import org.apache.storm.tuple.Fields;
import org.apache.storm.tuple.Values;


public class HiveTopology {
    static final String USER_SPOUT_ID = "user-spout";
    static final String BOLT_ID = "my-hive-bolt";
    static final String TOPOLOGY_NAME = "hive-test-topology1";

    public static void main(String[] args) throws Exception {
        String metaStoreUri = args[0];
        String dbName = args[1];
        String tblName = args[2];
        String[] colNames = {"id","name","phone","street","city","state"};
        Config config = new Config();
        config.setNumWorkers(1);
        UserDataSpout spout = new UserDataSpout();
        DelimitedRecordHiveMapper mapper = new DelimitedRecordHiveMapper()
                .withColumnFields(new Fields(colNames));
        HiveOptions hiveOptions;
        if (args.length == 6) {
            hiveOptions = new HiveOptions(metaStoreUri,dbName,tblName,mapper)
                .withTxnsPerBatch(10)
                .withBatchSize(100)
                .withIdleTimeout(10)
                .withKerberosKeytab(args[4])
                .withKerberosPrincipal(args[5]);
        } else {
            hiveOptions = new HiveOptions(metaStoreUri,dbName,tblName,mapper)
                .withTxnsPerBatch(10)
                .withBatchSize(100)
                .withIdleTimeout(10)
                .withMaxOpenConnections(1);
        }

        HiveBolt hiveBolt = new HiveBolt(hiveOptions);
        TopologyBuilder builder = new TopologyBuilder();
        builder.setSpout(USER_SPOUT_ID, spout, 1);
        // SentenceSpout --> MyBolt
        builder.setBolt(BOLT_ID, hiveBolt, 1)
                .shuffleGrouping(USER_SPOUT_ID);
        
        String topoName = TOPOLOGY_NAME;
        if (args.length >= 4) {
            topoName = args[3];
        }
        StormSubmitter.submitTopology(topoName, config, builder.createTopology());
    }

    public static void waitForSeconds(int seconds) {
        try {
            Thread.sleep(seconds * 1000);
        } catch (InterruptedException e) {
            //ignore
        }
    }

    public static class UserDataSpout extends BaseRichSpout {
        private ConcurrentHashMap<UUID, Values> pending;
        private SpoutOutputCollector collector;
        private String[] sentences = {
            "1,user1,123456,street1,sunnyvale,ca",
            "2,user2,123456,street2,sunnyvale,ca",
            "3,user3,123456,street3,san jose,ca",
            "4,user4,123456,street4,san jose,ca",
        };
        private int index = 0;
        private int count = 0;
        private long total = 0L;

        @Override
        public void declareOutputFields(OutputFieldsDeclarer declarer) {
            declarer.declare(new Fields("id","name","phone","street","city","state"));
        }

        @Override
        public void open(Map<String, Object> config, TopologyContext context,
                         SpoutOutputCollector collector) {
            this.collector = collector;
            this.pending = new ConcurrentHashMap<UUID, Values>();
        }

        @Override
        public void nextTuple() {
            String[] user = sentences[index].split(",");
            Values values = new Values(Integer.parseInt(user[0]),user[1],user[2],user[3],user[4],user[5]);
            UUID msgId = UUID.randomUUID();
            this.pending.put(msgId, values);
            this.collector.emit(values, msgId);
            index++;
            if (index >= sentences.length) {
                index = 0;
            }
            count++;
            total++;
            if (count > 1000) {
                count = 0;
                System.out.println("Pending count: " + this.pending.size() + ", total: " + this.total);
            }
            Thread.yield();
        }

        @Override
        public void ack(Object msgId) {
            this.pending.remove(msgId);
        }

        @Override
        public void fail(Object msgId) {
            System.out.println("**** RESENDING FAILED TUPLE");
            this.collector.emit(this.pending.get(msgId), msgId);
        }
    }
}