Show ThreadingTest.java syntax highlighted
/*
* Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
*
* This software is open source.
* See the bottom of this file for the licence.
*/
package org.dom4j;
import com.clarkware.junitperf.LoadTest;
import com.clarkware.junitperf.TimedTest;
import junit.extensions.RepeatedTest;
import junit.framework.Test;
import junit.framework.TestSuite;
import junit.textui.TestRunner;
import java.text.FieldPosition;
import java.text.SimpleDateFormat;
import java.util.Date;
/**
* A test harness to test the dom4j package in a threaded environment
*
* @author <a href="mailto:ddlucas@lse.com">David Lucas </a>
* @version $Revision: 1.1 $
*/
public class ThreadingTest extends AbstractTestCase {
private static final ThreadLocal FORMATTER_CACHE = new ThreadLocal();
private static final String SEPERATOR = " - ";
private static final FieldPosition FIELD_ZERO = new FieldPosition(0);
public ThreadingTest(String name) {
super(name);
}
private static void preformat(StringBuffer strBuf, String context) {
long now = System.currentTimeMillis();
Date currentTime = new Date(now);
SimpleDateFormat formatter = (SimpleDateFormat) FORMATTER_CACHE.get();
if (formatter == null) {
formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS zzz");
FORMATTER_CACHE.set(formatter);
}
strBuf.append("[");
formatter.format(currentTime, strBuf, FIELD_ZERO);
strBuf.append(" (").append(now).append(") ]");
strBuf.append(SEPERATOR);
strBuf.append(getThreadId());
strBuf.append(SEPERATOR);
strBuf.append(context);
strBuf.append(SEPERATOR);
}
private static String getThreadId() {
String tid = Thread.currentThread().getName();
return tid;
}
/**
* This test combines many different types of operations on DOM4J in a
* threaded environment. If a problem occurs with threading, the tests will
* fail. This was used to help isolate an internal threading issue.
* Unfortunately it may not always create the condition necessary to break
* un-thread-safe code. This is due to the nature of the machine, JVM, and
* application and if the conditions are right. Typically the problems of
* multithreading occur due to an unprotected HashMap or ArrayList in a
* class being used by more than one thread. Also, most developers think
* that their class or object instance will only be used by one thread. But
* if a factory or singleton caches a class or instance, it can quickly
* become an unsafe environment. Hence this test to assist in locating
* threading issues.
*/
public void testCombo() {
int loop = 10;
try {
long begin = System.currentTimeMillis();
String value = null;
String expected = null;
String xml = null;
Document doc = null;
Element root = null;
Element item = null;
Element newItem = null;
QName qn = null;
Namespace ns = null;
long now = 0;
xml = "<ROOT xmlns:t0=\"http://www.lse.com/t0\" >"
+ " <ctx><type>Context</type></ctx>"
+ " <A><B><C><D>This is a TEST</D></C></B></A>"
+ " <t0:Signon><A>xyz</A><t0:Cust>customer</t0:Cust>"
+ "</t0:Signon></ROOT>";
for (int i = 0; i < loop; i++) {
doc = DocumentHelper.parseText(xml);
root = doc.getRootElement();
ns = Namespace.get("t0", "http://www.lse.com/t0");
qn = QName.get("Signon", ns);
item = root.element(qn);
value = item.asXML();
expected = "<t0:Signon xmlns:t0=\"http://www.lse.com/t0\">"
+ "<A>xyz</A><t0:Cust>customer</t0:Cust></t0:Signon>";
assertEquals("test t0:Signon ", expected, value);
qn = root.getQName("Test");
newItem = DocumentHelper.createElement(qn);
now = System.currentTimeMillis();
newItem.setText(String.valueOf(now));
root.add(newItem);
qn = root.getQName("Test2");
newItem = DocumentHelper.createElement(qn);
now = System.currentTimeMillis();
newItem.setText(String.valueOf(now));
root.add(newItem);
item = root.element(qn);
item.detach();
item.setQName(qn);
root.add(item);
value = item.asXML();
expected = "<Test2>" + now + "</Test2>";
assertEquals("test Test2 ", expected, value);
qn = root.getQName("Test3");
newItem = DocumentHelper.createElement(qn);
now = System.currentTimeMillis();
newItem.setText(String.valueOf(now));
root.add(newItem);
item = root.element(qn);
item.detach();
item.setQName(qn);
root.add(item);
value = item.asXML();
expected = "<Test3>" + now + "</Test3>";
assertEquals("test Test3 ", expected, value);
qn = item.getQName("Test4");
newItem = DocumentHelper.createElement(qn);
now = System.currentTimeMillis();
newItem.setText(String.valueOf(now));
root.add(newItem);
item = root.element(qn);
item.detach();
item.setQName(qn);
root.add(item);
value = item.asXML();
expected = "<Test4>" + now + "</Test4>";
assertEquals("test Test4 ", expected, value);
}
double duration = System.currentTimeMillis() - begin;
double avg = duration / loop;
} catch (Exception e) {
e.printStackTrace();
assertTrue("Exception in test: " + e.getMessage(), false);
}
}
/**
* This test isolates QNameCache in a multithreaded environment.
*/
public void testQNameCache() {
int loop = 100;
try {
long begin = System.currentTimeMillis();
String value = null;
String expected = null;
String xml = null;
Document doc = null;
Element root = null;
Element item = null;
Element newItem = null;
QName qn = null;
Namespace ns = null;
long now = 0;
xml = "<ROOT xmlns:t0=\"http://www.lse.com/t0\" >"
+ " <ctx><type>Context</type></ctx>"
+ " <A><B><C><D>This is a TEST</D></C></B></A>"
+ " <t0:Signon><A>xyz</A><t0:Cust>customer</t0:Cust>"
+ "</t0:Signon></ROOT>";
for (int i = 0; i < loop; i++) {
doc = DocumentHelper.parseText(xml);
root = doc.getRootElement();
qn = DocumentHelper.createQName("test");
value = fetchValue(qn);
expected = "<test/>";
assertEquals("test test ", expected, value);
// creat it again
qn = DocumentHelper.createQName("test");
value = fetchValue(qn);
expected = "<test/>";
assertEquals("test test again ", expected, value);
qn = root.getQName("t0:Signon");
value = fetchValue(qn);
expected = "<t0:Signon xmlns:t0=\"http://www.lse.com/t0\"/>";
assertEquals("test t0:Signon ", expected, value);
}
double duration = System.currentTimeMillis() - begin;
double avg = duration / loop;
} catch (Exception e) {
e.printStackTrace();
assertTrue("Exception in test: " + e.getMessage(), false);
}
}
/**
* This method creates a value that can be expected during a test
*
* @param qn
*
* @return
*/
public String fetchValue(QName qn) {
String value = null;
StringBuffer sb = new StringBuffer();
sb.append("<");
String prefix = qn.getNamespacePrefix();
if ((prefix != null) && (prefix.length() > 0)) {
sb.append(prefix).append(":");
}
sb.append(qn.getName());
String uri = qn.getNamespaceURI();
if ((uri != null) && (uri.length() > 0)) {
sb.append(" xmlns");
if ((prefix != null) && (prefix.length() > 0)) {
sb.append(":").append(prefix);
}
sb.append("=\"").append(uri).append("\"");
}
sb.append("/>");
value = sb.toString();
return value;
}
/**
* Assembles and returns a test suite.
*
* @return The suite
*/
public static Test suite() {
TestSuite suite = new TestSuite();
suite.addTest(makeRepeatedLoadTest(5, 10, "testCombo"));
suite.addTest(makeRepeatedLoadTest(5, 10, "testQNameCache"));
return suite;
}
/**
* JUnit method to exercise test via threads and loops
*
* @param users
* Number of users to simulate (i.e. Threads).
* @param iterations
* Number of iterations per user ( repeat the test x times).
* @param testMethod
* method to execute (testXXX).
*
* @return A Junit test
*/
protected static Test makeRepeatedLoadTest(int users, int iterations,
String testMethod) {
long maxElapsedTime = 120000 + (1000 * users * iterations);
Test testCase = new ThreadingTest(testMethod);
Test repeatedTest = new RepeatedTest(testCase, iterations);
Test loadTest = new LoadTest(repeatedTest, users);
Test timedTest = new TimedTest(loadTest, maxElapsedTime);
return timedTest;
}
public static void main(String[] args) {
TestRunner.run(ThreadingTest.class);
}
}
/*
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided that the
* following conditions are met:
*
* 1. Redistributions of source code must retain copyright statements and
* notices. Redistributions must also contain a copy of this document.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The name "DOM4J" must not be used to endorse or promote products derived
* from this Software without prior written permission of MetaStuff, Ltd. For
* written permission, please contact dom4j-info@metastuff.com.
*
* 4. Products derived from this Software may not be called "DOM4J" nor may
* "DOM4J" appear in their names without prior written permission of MetaStuff,
* Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
*
* 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
*
* THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
*/
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