[XMLBEANS-84] Cannot run XmlObject.selectPath using Jaxen in multi threaded environment - ASF JIRA

Details

Type: Bug
Status: Closed
Priority: Minor
Resolution: Fixed
Affects Version/s: Version 1.0.3
Fix Version/s: Version 2 Beta 1
Component/s: XPath
Labels:
None
Environment:
Win2k, JDK 1.4.2_06

Description

Whe using complex XPATH which fires Jaxen under the covers is causing problems in Multithreaded environment. The following stack trace:

C:\j2sdk1.4.2\bin\java -Didea.launcher.port=7543 -Didea.launcher.library=C:\IntelliJ-EAP\bin\breakgen.dll -Dfile.encoding=windows-1252 -classpath C:\j2sdk1.4.2\jre\lib\charsets.jar;C:\j2sdk1.4.2\jre\lib\jce.jar;C:\j2sdk1.4.2\jre\lib\jsse.jar;C:\j2sdk1.4.2\jre\lib\plugin.jar;C:\j2sdk1.4.2\jre\lib\rt.jar;C:\j2sdk1.4.2\jre\lib\sunrsasign.jar;C:\j2sdk1.4.2\jre\lib\ext\dnsns.jar;C:\j2sdk1.4.2\jre\lib\ext\ldapsec.jar;C:\j2sdk1.4.2\jre\lib\ext\localedata.jar;C:\j2sdk1.4.2\jre\lib\ext\sunjce_provider.jar;D:\GOLD\test\application\classes;D:\GOLD\application\classes;C:\src\IdeaProjects\GOLD\extlib\sun\jars\mail-1.3.1.jar;C:\src\IdeaProjects\GOLD\extlib\sun\jars\activation-1.0.2.jar;D:\GOLD\common\classes;C:\src\IdeaProjects\GOLD\extlib\commons-beanutils\jars\commons-beanutils-1.6.jar;C:\src\IdeaProjects\GOLD\extlib\commons-collections\jars\commons-collections-2.1.jar;C:\src\IdeaProjects\GOLD\extlib\commons-lang\jars\commons-lang-2.0.jar;C:\src\IdeaProjects\GOLD\extlib\ehcache\jars\ehcache-0.7.jar;C:\src\IdeaProjects\GOLD\extlib\GOLD\jars\abc-clio-1.0-SNAPSHOT.jar;C:\src\IdeaProjects\GOLD\extlib\GOLD\jars\helpxmlbeans-1.0-SNAPSHOT.jar;C:\src\IdeaProjects\GOLD\extlib\GOLD\jars\hitsxmlbeans-1.0-SNAPSHOT.jar;C:\src\IdeaProjects\GOLD\extlib\GOLD\jars\pregoldxmlbeans-1.0-SNAPSHOT.jar;C:\src\IdeaProjects\GOLD\extlib\GOLD\jars\productconfig-1.0-SNAPSHOT.jar;C:\src\IdeaProjects\GOLD\extlib\jfig\jars\jfig-1.2.jar;C:\src\IdeaProjects\GOLD\extlib\junit\jars\junit-3.8.1.jar;C:\src\IdeaProjects\GOLD\extlib\log4j\jars\log4j-1.2.8.jar;C:\src\IdeaProjects\GOLD\extlib\mockobjects\jars\mockobjects-0.9.1.jar;C:\src\IdeaProjects\GOLD\extlib\mockobjects\jars\mockobjects-jdk1.3-j2ee1.3-0.09.jar;C:\src\IdeaProjects\GOLD\extlib\xerces\jars\xercesImpl-2.5.jar;C:\src\IdeaProjects\GOLD\extlib\xerces\jars\xmlParserAPIs-2.2.jar;C:\src\IdeaProjects\GOLD\extlib\commons-logging\jars\commons-logging-1.0.3.jar;C:\src\IdeaProjects\GOLD\extlib\sybase\jars\jconn2-5.5.jar;C:\src\IdeaProjects\GOLD\extlib\xml-beans\jars\xbean-1.0.3.jar;C:\src\IdeaProjects\GOLD\extlib\xml-beans\jars\xbean_xpath-1.0.3.jar;C:\src\jaxen\target\jaxen-1.1-beta-4.jar;C:\apps\googleapi\googleapi.jar;C:\Ice-1.5.1\lib\Ice.jar;C:\tomcat-5.0.27\common\lib\commons-dbcp-1.2.1.jar;C:\tomcat-5.0.27\common\lib\commons-pool-1.2.jar;C:\IntelliJ-EAP\lib\idea_rt.jar com.intellij.rt.execution.application.AppMain com.XmlObjectTest
Thread:Thread: [0]
java.lang.IllegalStateException: Cursor has been disposed
at org.apache.xmlbeans.impl.store.Cursor.checkDisposed(Cursor.java:116)
at org.apache.xmlbeans.impl.store.Cursor.checkDisposed(Cursor.java:110)
at org.apache.xmlbeans.impl.store.Cursor.toBookmark(Cursor.java:255)
at org.apache.xmlbeans.XmlCursor$XmlBookmark.toBookmark(XmlCursor.java:1312)
at org.apache.xmlbeans.impl.xpath.jaxen.XBeansNavigator.getChildAxisIterator(XBeansNavigator.java:387)
at org.jaxen.expr.iter.IterableChildAxis.iterator(IterableChildAxis.java:79)
at org.jaxen.expr.DefaultStep.axisIterator(DefaultStep.java:137)
at org.jaxen.expr.DefaultNameStep.evaluate(DefaultNameStep.java:201)
at org.jaxen.expr.DefaultLocationPath.evaluate(DefaultLocationPath.java:151)
at org.jaxen.expr.DefaultXPathExpr.asList(DefaultXPathExpr.java:107)
at org.jaxen.BaseXPath.selectNodesForContext(BaseXPath.java:715)
at org.jaxen.BaseXPath.selectNodes(BaseXPath.java:244)
at org.apache.xmlbeans.impl.xpath.jaxen.XBeansXPathAdv.selectNodes(XBeansXPathAdv.java:76)
at org.apache.xmlbeans.impl.xpath.jaxen.XBeansXPathAdv.selectPath(XBeansXPathAdv.java:83)
at org.apache.xmlbeans.impl.store.Path$JaxenPathImpl$JaxenPathEngine.next(Path.java:536)
at org.apache.xmlbeans.impl.store.Cursor$Selections.setCursor(Cursor.java:3260)
at org.apache.xmlbeans.impl.store.Cursor.selectPath(Cursor.java:2903)
at org.apache.xmlbeans.impl.values.XmlObjectBase.selectPath(XmlObjectBase.java:396)
at org.apache.xmlbeans.impl.values.XmlObjectBase.selectPath(XmlObjectBase.java:380)
at com.XmlObjectTest.fetchDocumentTypeFromCitation(XmlObjectTest.java:101)
at com.XmlObjectTest.runTest(XmlObjectTest.java:90)
at com.XmlObjectTest.access$000(XmlObjectTest.java:37)
at com.XmlObjectTest$TestThread.run(XmlObjectTest.java:76)
Thread: [1] => documentType = Article
Thread: [0] => documentType = null

Process finished with exit code 0

Test program:
/**

XmlObjectTest.java
Version : GOLD 0.1
*
Copyright 2004,
by The Gale Group
27500 Drake Rd.
Farmington Hills, MI 48331-3535
Telephone (248) 699-4253
*
This code is the sole property of The Gale Group and is protected by
copyright under the laws of the United States. This program is
confidential, proprietary, and a trade secret, not to be disclosed
without written authorization from The Gale Group. Any use,
duplication, or disclosure of this program by other than
The Gale Group and its assigned licensees is strictly forbidden by law.
*
All rights reserved.
*/
package com;

import org.apache.xmlbeans.XmlObject;
import org.apache.xmlbeans.XmlException;
import org.apache.xmlbeans.impl.values.XmlObjectBase;

import java.io.FileReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;

/**

The <code>XmlObjectTest </code>
*
@author Venkat Ramana Sonnathi (HTC Global Svc. Inc.)
@version 1.0
*/
public class XmlObjectTest {

public static void main(String[] args) throws XmlException, IOException, InterruptedException {

for(int i=0 ; i < 2 ; ++i)

{ TestThread mythread = new TestThread("Thread: [" + i + "]"); mythread.start(); }

}

public static class TestThread extends Thread {
/**

Allocates a new <code>Thread</code> object. This constructor has
the same effect as <code>Thread(null, null, name)</code>.
*
@param name the name of the new thread.
@see Thread#Thread(ThreadGroup,
Runnable, String)
*/
public TestThread(String name) { super(name); }

/**

If this thread was constructed using a separate
<code>Runnable</code> run object, then that
<code>Runnable</code> object's <code>run</code> method is called;
otherwise, this method does nothing and returns.
Subclasses of <code>Thread</code> should override this method.
*
@see Thread#start()
@see Thread#stop()
@see Thread#Thread(ThreadGroup,
Runnable, String)
@see Runnable#run()
*/
public void run() { XmlObjectTest.runTest(getName()); }

}

private static void runTest(String name) {
XmlObject result = null;
try

{ result = XmlObject.Factory.parse(new FileReader(new File("resultItem.xml"))); }

catch (XmlException e)

{ e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates. } catch (IOException e) { e.printStackTrace(); //To change body of catch statement use File | Settings | File Templates. }

String documentType = fetchDocumentTypeFromCitation(result, "FIELD[@NAME='DT']");
System.out.println(name + " => documentType = " + documentType);
//To change body of created methods use File | Settings | File Templates.
}

private static String fetchDocumentTypeFromCitation(XmlObject xmlObject, String xpathForDocType) {

try {
XmlObject[] docTypeArr = null;
if (xpathForDocType != null) {
docTypeArr = xmlObject.selectPath("CB/CD/" + xpathForDocType);
if (docTypeArr.length > 0)

{ return ((XmlObjectBase) docTypeArr[0]).getStringValue(); }

}
docTypeArr = xmlObject.selectPath("CB/CD/RECTYPE");
String docType = (docTypeArr.length > 0) ? ((XmlObjectBase) docTypeArr[0]).getStringValue() : null;
return docType;
} catch (Exception e)

{ System.out.println("Thread:"+ Thread.currentThread().getName()); e.printStackTrace(); }

return null;
}

}

Sample xml file:
<?xml version="1.0" encoding="UTF-8"?>
<CB>
<CI>1</CI>
<CM>N</CM>
<CV>N</CV>
<CFT>N</CFT>
<CEFT>N</CEFT>
<CFA>N</CFA>
<CFI>N</CFI>
<CFEI>N</CFEI>
<CEMAIL>N</CEMAIL>
<L2H>B</L2H>
<CFN>N</CFN>
<CJ>7010</CJ>
<CN>CX3411000020</CN>
<RT>46</RT>
<CP>X</CP>
<CD>
<RECTYPE>EBKS</RECTYPE>
<VERSION>FMT BUILD G_1_00_00_006 10/30/2004</VERSION>
<TABLE>gold_cita_ebks.fmt 09-Oct-2004</TABLE>
<FIELD NAME="AL">Middle School</FIELD>
<FIELD NAME="BA">0PHX</FIELD>
<FIELD NAME="BE">Baker, Lawrence W.</FIELD>
<FIELD NAME="BE">Hillstrom, Kevin</FIELD>
<FIELD NAME="BE">Hillstrom, Laurie Collier</FIELD>
<FIELD NAME="BE">Carnagie, Julie L.</FIELD>
<FIELD NAME="BU">Lawrence W. Baker</FIELD>
<FIELD NAME="BU">Kevin Hillstrom</FIELD>
<FIELD NAME="BU">Laurie Collier Hillstrom</FIELD>
<FIELD NAME="BU">Julie L. Carnagie</FIELD>
<FIELD NAME="CB">French and Indian War</FIELD>
<FIELD NAME="CG">
French and Indian War
. Lawrence W. Baker, Kevin Hillstrom, Laurie Collier Hillstrom, and Julie L. Carnagie, eds. Vol. 1. Detroit: U*X*L, 2003.
</FIELD>
<FIELD NAME="DT">Article</FIELD>
<FIELD NAME="EB">0-7876-9158-5</FIELD>
<FIELD NAME="EI">0787691585</FIELD>
<FIELD NAME="FL">fiw_01_00020.xml</FIELD>
<FIELD NAME="IB">0-7876-6560-6</FIELD>
<FIELD NAME="IL">Yes</FIELD>
<FIELD NAME="IP">00119</FIELD>
<FIELD NAME="IX">UXL</FIELD>
<FIELD NAME="LA">English</FIELD>
<FIELD NAME="LP">Detroit</FIELD>
<FIELD NAME="MG">bookitem</FIELD>
<FIELD NAME="PB">U*X*L</FIELD>
<FIELD NAME="PC">
King George II
. .
</FIELD>
<FIELD NAME="PC">
John Stuart, third earl of Bute
.
Reproduced by permission of
.
</FIELD>
<FIELD NAME="PC">
Lieutenant Colonel George Croghan
.
Reproduced by permission of
.
</FIELD>
<FIELD NAME="PF">Jan 1, 2003</FIELD>
<FIELD NAME="SC">
French and Indian War
. Vol. 1. U*X*L, 2003.
</FIELD>
<FIELD NAME="SH">History</FIELD>
<FIELD NAME="SO">French and Indian War</FIELD>
<FIELD NAME="SV">0001</FIELD>
<FIELD NAME="TB">French and Indian War |9999|2003|0787691585</FIELD>
<FIELD NAME="TD">1760-62: The War Continues in Europe</FIELD>
<FIELD NAME="TE">1760-62: The War Continues in Europe</FIELD>
<FIELD NAME="TG">9</FIELD>
<FIELD NAME="TY">Topic Overview</FIELD>
<FIELD NAME="UZ">FIW</FIELD>
<FIELD NAME="XZ">1760-62: The War Continues in Europe</FIELD>
<FIELD NAME="YC">2003</FIELD>
<FIELD NAME="ZA">fiw_01_00119-p.pdf</FIELD>
<FIELD NAME="ZB">fiw_01_00127-p.pdf</FIELD>
<FIELD NAME="ZZ">CX3411000020</FIELD>
<FIELD NAME="GI">Yes</FIELD>
</CD>
</CB>

Cannot run XmlObject.selectPath using Jaxen in multi threaded environment

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