com.hmsonline.storm.cassandra.bolt.CassandraBolt Maven / Gradle / Ivy

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package com.hmsonline.storm.cassandra.bolt;

import java.io.Serializable;
import java.util.List;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import backtype.storm.task.TopologyContext;
import backtype.storm.tuple.Tuple;

import com.hmsonline.storm.cassandra.bolt.mapper.TupleCounterMapper;
import com.hmsonline.storm.cassandra.bolt.mapper.TupleMapper;
import com.hmsonline.storm.cassandra.client.AstyanaxClient;

@SuppressWarnings("serial")
public abstract class CassandraBolt implements Serializable {
    private static final Logger LOG = LoggerFactory.getLogger(CassandraBolt.class);

//    private Class columnNameClass;
//    private Class columnValueClass;
    private String clientConfigKey;

    protected AstyanaxClient client;

    protected TupleMapper tupleMapper;
    protected Map stormConfig;

    public CassandraBolt(String clientConfigKey, TupleMapper tupleMapper) {
        this.tupleMapper = tupleMapper;
//        this.columnNameClass = columnNameClass;
//        this.columnValueClass = columnValueClass;
        this.clientConfigKey = clientConfigKey;

        LOG.debug("Creating Cassandra Bolt (" + this + ")");
    }

    @SuppressWarnings("unchecked")
    public void prepare(Map stormConf, TopologyContext context) {
        Map config = (Map) stormConf.get(this.clientConfigKey);
        this.client = new AstyanaxClient();
        this.client.start(config);
    }

    public void cleanup() {
        this.client.stop();
    }

    public void writeTuple(Tuple input, TupleMapper tupleMapper) throws Exception {
        this.client.writeTuple(input, tupleMapper);
    }

    public void writeTuples(List inputs, TupleMapper tupleMapper) throws Exception {
        this.client.writeTuples(inputs, tupleMapper);
    }

    public Map getComponentConfiguration() {
        return null;
    }

    public void incrementCounter(Tuple input, TupleCounterMapper tupleMapper) throws Exception {
        this.client.incrementCountColumn(input, tupleMapper);
    }

    public void incrementCounters(List inputs, TupleCounterMapper tupleMapper) throws Exception {
        this.client.incrementCountColumns(inputs, tupleMapper);
    }
}