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ActiveMQ example source code file (BitArrayBinTest.java)

This example ActiveMQ source code file (BitArrayBinTest.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

bitarraybin, bitarraybin, bitarraybintest, bitarraybintest, exception, exception, testcase, testcase

The ActiveMQ BitArrayBinTest.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.util;

import junit.framework.TestCase;

public class BitArrayBinTest extends TestCase {
        
    public void testSetAroundWindow() throws Exception {
        doTestSetAroundWindow(500, 2000);
        doTestSetAroundWindow(512, 2000);
        doTestSetAroundWindow(128, 512);
    }

    public void testSetHiLo() throws Exception {
        BitArrayBin toTest = new BitArrayBin(50);
        toTest.setBit(0, true);
        toTest.setBit(100, true);
        toTest.setBit(150, true);
        assertTrue("set", toTest.getBit(0));

        toTest.setBit(0, true);
        assertTrue("set", toTest.getBit(0));        
    }
    
    private void doTestSetAroundWindow(int window, int dataSize) throws Exception {

        BitArrayBin toTest = new BitArrayBin(window);
        
        for (int i=0; i <= dataSize; i++) {
            assertTrue("not already set", !toTest.setBit(i, Boolean.TRUE));
            assertEquals("current is max", i, toTest.getLastSetIndex());
        }

        assertEquals("last is max", dataSize, toTest.getLastSetIndex());
        
        int windowOfValidData = roundWindow(dataSize, window);
        int i=dataSize;
        for (; i >= dataSize -windowOfValidData; i--) {
            assertTrue("was already set, id=" + i, toTest.setBit(i, Boolean.TRUE));
        }

        assertEquals("last is still max", dataSize, toTest.getLastSetIndex());
        
        for (; i >= 0; i--) {
            assertTrue("was not already set, id=" + i, !toTest.setBit(i, Boolean.TRUE));
        }
        
        for (int j= dataSize +1; j<=(2*dataSize); j++) {
            assertTrue("not already set: id=" + j, !toTest.setBit(j, Boolean.TRUE));
        }
        
        assertEquals("last still max*2", 2*dataSize, toTest.getLastSetIndex());

    }
    
    public void testSetUnsetAroundWindow() throws Exception {
        doTestSetUnSetAroundWindow(500, 2000);
        doTestSetUnSetAroundWindow(512, 2000);
        doTestSetUnSetAroundWindow(128, 512);
    }
    
    private void doTestSetUnSetAroundWindow(int dataSize, int window) throws Exception {

        BitArrayBin toTest = new BitArrayBin(window);
        
        for (int i=0; i <=dataSize; i++) {
            assertTrue("not already set", !toTest.setBit(i, Boolean.TRUE));
        }
                
        int windowOfValidData = roundWindow(dataSize, window);
        for (int i=dataSize; i >= 0 && i >=dataSize -windowOfValidData; i--) {
            assertTrue("was already set, id=" + i, toTest.setBit(i, Boolean.FALSE));
        }

        for (int i=0; i <=dataSize; i++) {
            assertTrue("not already set, id:" + i, !toTest.setBit(i, Boolean.TRUE));
        }

        for (int j= 2*dataSize; j< 4*dataSize; j++) {
            assertTrue("not already set: id=" + j, !toTest.setBit(j, Boolean.TRUE));
        }
    }
    
    public void testSetAroundLongSizeMultiplier() throws Exception {
        int window = 512;
        int dataSize = 1000;
        for (int muliplier=1; muliplier <8; muliplier++) {
            for (int value=0; value <dataSize; value++) {
                BitArrayBin toTest = new BitArrayBin(window);
                
                int instance = value +muliplier*BitArray.LONG_SIZE;
                assertTrue("not already set: id=" + instance, !toTest.setBit(instance, Boolean.TRUE));
                assertTrue("not already set: id=" + value, !toTest.setBit(value, Boolean.TRUE));
                assertEquals("max set correct", instance, toTest.getLastSetIndex());
            }
        }
    }
    
    public void testLargeGapInData(int window) throws Exception {
        doTestLargeGapInData(128);
        doTestLargeGapInData(500);
    }
    
    public void doTestLargeGapInData(int window) throws Exception {
        BitArrayBin toTest = new BitArrayBin(window);
        
        int instance = BitArray.LONG_SIZE;
        assertTrue("not already set: id=" + instance,  !toTest.setBit(instance, Boolean.TRUE));
        
        instance = 12 *BitArray.LONG_SIZE;
        assertTrue("not already set: id=" + instance,  !toTest.setBit(instance, Boolean.TRUE));
        
        instance = 9 *BitArray.LONG_SIZE;
        assertTrue("not already set: id=" + instance,  !toTest.setBit(instance, Boolean.TRUE));
    }
    
    
   public void testLastSeq() throws Exception {
       BitArrayBin toTest = new BitArrayBin(512);
       assertEquals("last not set", -1, toTest.getLastSetIndex());
       
       toTest.setBit(1, Boolean.TRUE);
       assertEquals("last correct", 1, toTest.getLastSetIndex());
       
       toTest.setBit(64, Boolean.TRUE);
       assertEquals("last correct", 64, toTest.getLastSetIndex());
       
       toTest.setBit(68, Boolean.TRUE);
       assertEquals("last correct", 68, toTest.getLastSetIndex());
       
   }
    
    // window moves in increments of BitArray.LONG_SIZE.
    // valid data window on low end can be larger than window
    private int roundWindow(int dataSetEnd, int windowSize) {
        
        int validData = dataSetEnd - windowSize;
        int validDataBin = validData / BitArray.LONG_SIZE;
        validDataBin += (windowSize % BitArray.LONG_SIZE > 0? 1:0);
        int startOfValid = validDataBin * BitArray.LONG_SIZE;
        
        return dataSetEnd - startOfValid;        
    }

}

Other ActiveMQ examples (source code examples)

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