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ActiveMQ example source code file (IndexTestSupport.java)

This example ActiveMQ source code file (IndexTestSupport.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

count, exception, exception, expected, expected, file, index, index, indextestsupport, io, ioexception, key, long, long, pagefile

The ActiveMQ IndexTestSupport.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.kahadb.index;

import java.io.File;
import java.io.IOException;

import junit.framework.TestCase;
import org.apache.kahadb.page.PageFile;
import org.apache.kahadb.page.Transaction;
import org.apache.kahadb.util.IOHelper;

/**
 * Test a HashIndex
 */
public abstract class IndexTestSupport extends TestCase {

    private static final int COUNT = 10000;

    protected Index<String,Long> index;
    protected File directory;
    protected PageFile pf;
    protected Transaction tx;

    /**
     * @throws java.lang.Exception
     * @see junit.framework.TestCase#setUp()
     */
    protected void setUp() throws Exception {
        super.setUp();
        directory = new File(IOHelper.getDefaultDataDirectory());
        IOHelper.mkdirs(directory);
        IOHelper.deleteChildren(directory);
        
    }

    protected void tearDown() throws Exception {
        if( pf!=null ) {
            pf.unload();
            pf.delete();
        }
    }
    
    protected void createPageFileAndIndex(int pageSize) throws Exception {
        pf = new PageFile(directory, getClass().getName());
        pf.setPageSize(pageSize);
        pf.load();
        tx = pf.tx();
        this.index = createIndex();
    }

    abstract protected Index<String, Long> createIndex() throws Exception;

    public void testIndex() throws Exception {
        createPageFileAndIndex(500);
        this.index.load(tx);
        tx.commit();
        doInsert(COUNT);
        this.index.unload(tx);
        tx.commit();
        this.index.load(tx);
        tx.commit();
        checkRetrieve(COUNT);
        doRemove(COUNT);
        this.index.unload(tx);
        tx.commit();
        this.index.load(tx);
        tx.commit();
        doInsert(COUNT);
        doRemoveHalf(COUNT);
        doInsertHalf(COUNT);
        this.index.unload(tx);
        tx.commit();
        this.index.load(tx);
        tx.commit();
        checkRetrieve(COUNT);
        this.index.unload(tx);
        tx.commit();
    }

    void doInsert(int count) throws Exception {
        for (int i = 0; i < count; i++) {
            index.put(tx, key(i), (long)i);
            tx.commit();
        }
    }

    protected String key(int i) {
        return "key:"+i;
    }

    void checkRetrieve(int count) throws IOException {
        for (int i = 0; i < count; i++) {
            Long item = index.get(tx, key(i));
            assertNotNull("Key missing: "+key(i), item);
        }
    }

    void doRemoveHalf(int count) throws Exception {
        for (int i = 0; i < count; i++) {
            if (i % 2 == 0) {
                assertNotNull("Expected remove to return value for index "+i, index.remove(tx, key(i)));
                tx.commit();
            }

        }
    }

    void doInsertHalf(int count) throws Exception {
        for (int i = 0; i < count; i++) {
            if (i % 2 == 0) {
                index.put(tx, key(i), (long)i);
                tx.commit();
            }
        }
    }

    void doRemove(int count) throws Exception {
        for (int i = 0; i < count; i++) {
            assertNotNull("Expected remove to return value for index "+i, index.remove(tx, key(i)));
            tx.commit();
        }
        for (int i = 0; i < count; i++) {
            Long item = index.get(tx, key(i));
            assertNull(item);
        }
    }

    void doRemoveBackwards(int count) throws Exception {
        for (int i = count - 1; i >= 0; i--) {
            index.remove(tx, key(i));
            tx.commit();
        }
        for (int i = 0; i < count; i++) {
            Long item = index.get(tx, key(i));
            assertNull(item);
        }
    }

}

Other ActiveMQ examples (source code examples)

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

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