/**
 * 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.starter.spout;

import java.util.Map;
import java.util.Random;

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

import backtype.storm.spout.SpoutOutputCollector;
import backtype.storm.task.TopologyContext;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.topology.base.BaseRichSpout;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Values;
import backtype.storm.utils.Utils;

/**
 * Emits a random integer and a timestamp value (offset by one day), every 100
 * ms. The ts field can be used in tuple time based windowing.
 */
public class RandomIntegerSpout extends BaseRichSpout {
    private static final Logger  LOG   = LoggerFactory.getLogger(RandomIntegerSpout.class);
    private SpoutOutputCollector collector;
    private Random               rand;
    private long                 msgId = 0;
    
    @Override
    public void declareOutputFields(OutputFieldsDeclarer declarer) {
        declarer.declare(new Fields("value", "ts", "msgid"));
    }
    
    @Override
    public void open(Map conf, TopologyContext context, SpoutOutputCollector collector) {
        this.collector = collector;
        this.rand = new Random();
    }
    
    @Override
    public void nextTuple() {
        Utils.sleep(100);
        collector.emit(new Values(rand.nextInt(1000), System.currentTimeMillis() - (24 * 60 * 60 * 1000), ++msgId),
                msgId);
    }
    
    @Override
    public void ack(Object msgId) {
        LOG.debug("Got ACK for msgId : " + msgId);
    }
    
    @Override
    public void fail(Object msgId) {
        LOG.debug("Got FAIL for msgId : " + msgId);
    }
}