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ActiveMQ example source code file (Loader.java)

This example ActiveMQ source code file (Loader.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - ActiveMQ tags/keywords

countdownlatch, countdownlatch, iterator, loader, logger, marshaller, object, object, store, store, string, string, stringmarshaller, thread, threading, threads, util

The ActiveMQ Loader.java source code

/**
 * 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.activemq.kaha;

import java.util.Iterator;
import java.util.Set;
import java.util.concurrent.CountDownLatch;

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

/**
 * Store test
 * 
 * 
 */
class Loader extends Thread {

    private static final Logger LOG = LoggerFactory.getLogger(Loader.class);

    private String name;
    private Store store;
    private int count;
    private CountDownLatch start;
    private CountDownLatch stop;

    public Loader(String name, Store store, int count, CountDownLatch start, CountDownLatch stop) {
        this.name = name;
        this.store = store;
        this.count = count;
        this.start = start;
        this.stop = stop;
    }

    public void run() {
        try {
            start.countDown();
            start.await();
            Marshaller<String> keyMarshaller = new StringMarshaller();
            Marshaller<Object> valueMarshaller = new BytesMarshaller();
            MapContainer<String, Object> container = store.getMapContainer(name, store.getDefaultContainerName(), true);

            container.setKeyMarshaller(keyMarshaller);
            container.setValueMarshaller(valueMarshaller);
            container.load();
            // set data
            Object value = getData(1024);
            long startTime = System.currentTimeMillis();
            long startLoad = System.currentTimeMillis();
            for (int i = 0; i < count; i++) {
                String key = "key:" + i;
                container.put(key, value);
            }
            long finishLoad = System.currentTimeMillis();
            long totalLoadTime = finishLoad - startLoad;
            LOG.info("name " + name + " load time = " + totalLoadTime + "(ms)");

            Set<String> keys = container.keySet();
            long startExtract = System.currentTimeMillis();

            for (Iterator<String> i = keys.iterator(); i.hasNext();) {
                byte[] data = (byte[])container.get(i.next());
            }
            long finishExtract = System.currentTimeMillis();
            long totalExtractTime = finishExtract - startExtract;
            LOG.info("name " + name + " extract time = " + totalExtractTime + "(ms)");

            long startRemove = System.currentTimeMillis();
            for (Iterator<String> i = keys.iterator(); i.hasNext();) {
                container.remove(i.next());
            }
            long finishRemove = System.currentTimeMillis();
            long totalRemoveTime = finishRemove - startRemove;
            LOG.info("name " + name + " remove time = " + totalRemoveTime + "(ms)");
            // re-insert data of longer length
            startLoad = System.currentTimeMillis();
            value = getData(2048);
            for (int i = 0; i < count; i++) {
                // System.out.println(this + " Container size = " +
                // container.size());
                String key = "key:" + i;
                container.put(key, value);
            }
            finishLoad = System.currentTimeMillis();
            totalLoadTime = finishLoad - startLoad;
            LOG.info("name " + name + " 2nd load time = " + totalLoadTime + "(ms)");

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            stop.countDown();
        }
    }

    byte[] getData(int size) {
        byte[] result = new byte[size];
        for (int i = 0; i < size; i++) {
            result[i] = 'a';
        }
        return result;
    }
}

Other ActiveMQ examples (source code examples)

Here is a short list of links related to this ActiveMQ Loader.java source code file:

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