com.ottogroup.bi.spqr.pipeline.component.source.RandomNumberTestSource.java Source code

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Here is the source code for com.ottogroup.bi.spqr.pipeline.component.source.RandomNumberTestSource.java

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/**
 * Copyright 2015 Otto (GmbH & Co KG)
 *
 * 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.ottogroup.bi.spqr.pipeline.component.source;

import java.util.Properties;

import org.apache.commons.lang3.StringUtils;
import org.apache.log4j.Logger;

import com.ottogroup.bi.spqr.exception.ComponentInitializationFailedException;
import com.ottogroup.bi.spqr.exception.RequiredInputMissingException;
import com.ottogroup.bi.spqr.pipeline.component.MicroPipelineComponentType;
import com.ottogroup.bi.spqr.pipeline.message.StreamingDataMessage;

/**
 * Generates random numbers until it is stopped or it reaches a max of generated numbers as configured
 * @author mnxfst
 * @since Mar 6, 2015
 */
public class RandomNumberTestSource implements Source {

    private static final Logger logger = Logger.getLogger(RandomNumberTestSource.class);
    public static final String CFG_MAX_NUM_GENERATED = "maxNumGenerated";
    public static final String CFG_SEED = "seed";
    public static final String CFG_CONTENT = "content";

    private String id = null;
    private int maxNumGenerated = 0;
    private long seed = 0;
    private boolean running = false;
    private IncomingMessageCallback callback;
    private byte[] content = null;

    /**
     * @see com.ottogroup.bi.spqr.pipeline.component.MicroPipelineComponent#initialize(java.util.Properties)
     */
    public void initialize(Properties properties)
            throws RequiredInputMissingException, ComponentInitializationFailedException {
        this.maxNumGenerated = Integer.parseInt(StringUtils.trim(properties.getProperty(CFG_MAX_NUM_GENERATED)));
        try {
            this.seed = Long.parseLong(StringUtils.trim(properties.getProperty(CFG_SEED)));
        } catch (Exception e) {
            //
        }
        this.content = (properties.containsKey(CFG_CONTENT) ? properties.getProperty(CFG_CONTENT).getBytes()
                : new byte[0]);

        this.running = true;

    }

    /**
     * @see java.lang.Runnable#run()
     */
    public void run() {
        logger.info("Starting random number generator");
        //      Random rnd = null;
        //      if(seed > 0)
        //         rnd = new Random(seed);
        //      else
        //         rnd = new Random();

        int count = 0;
        long s1 = System.currentTimeMillis();
        while (running && maxNumGenerated != 0) {
            count++;
            this.callback.onMessage(new StreamingDataMessage(this.content, System.currentTimeMillis())); // string conversion takes too long!

            maxNumGenerated--;

        }
        logger.info(count + " numbers generated in: " + (System.currentTimeMillis() - s1) + "ms");
    }

    /**
     * @see com.ottogroup.bi.spqr.pipeline.component.MicroPipelineComponent#setId(java.lang.String)
     */
    public void setId(String id) {
        this.id = id;
    }

    /**
     * @see com.ottogroup.bi.spqr.pipeline.component.MicroPipelineComponent#shutdown()
     */
    public boolean shutdown() {
        this.running = false;
        return true;
    }

    /**
     * @see com.ottogroup.bi.spqr.pipeline.component.MicroPipelineComponent#getId()
     */
    public String getId() {
        return this.id;
    }

    /**
     * @see com.ottogroup.bi.spqr.pipeline.component.source.Source#setIncomingMessageCallback(com.ottogroup.bi.spqr.pipeline.component.source.IncomingMessageCallback)
     */
    public void setIncomingMessageCallback(IncomingMessageCallback incomingMessageCallback) {
        this.callback = incomingMessageCallback;
    }

    /**
     * @see com.ottogroup.bi.spqr.pipeline.component.MicroPipelineComponent#getType()
     */
    public MicroPipelineComponentType getType() {
        return MicroPipelineComponentType.SOURCE;
    }

    public long getSeed() {
        return seed;
    }

    public void setSeed(long seed) {
        this.seed = seed;
    }

}