[Cayenne-user] Loading cayenne mapped class from URLClassLoader

[Cayenne-user] Loading cayenne mapped class from URLClassLoader

	Rigel
	Nov 24, 2008 at 2:48 am

Hello,

I am trying to load some "jarred" class mappings generated by Cayenne using
the URLClassLoader,
of course if I load all libs into the starting classloader all goes well,
but when I use the URLClassLoader
I receive the following error message suddenly after invoking
"context.performQuery(select1)" :

[v.2.0.4 October 8 2007] No DataMap found, can't route query
[email protected][root=class ...]

My code:

DataContext context = DataContext.createDataContext();

URLClassLoader urlClassLoader = new URLClassLoader(remoteLibs);
try {
//Class<?> clzz =
Class.forName("org.someproject.SomeClass",true,urlClassLoader);
Class<?> clzz = urlClassLoader.loadClass("org.someproject.SomeClass");
Method m = clzz.getDeclaredMethod("executeCustom", new
Class[]{DataContext.class});
m.invoke(null, new Object[]{context});
} catch (Throwable e) {
e.printStackTrace();
}

Just to run it, where can I declare some local filesystem position to search
for XML data mappings?

P.S.
I noticed FileConfiguration.addResourcePath & co. but it works only if all
libraries are loaded
by the starting classloader

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7 responses
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Rigel

at Nov 24, 2008 at 5:38 am

⇧

rigel wrote:

Hello,
[...]
Going into the Cayenne source code I notice that the real message thrown by
EntityResolver.constructCache() is "Failed to load class
org.someproject.orm.cayenne.SomeEntity:
org.someproject.orm.cayenne.SomeEntity"
Solved by myself, just for other people interested to use URLClassLoader
with Cayenne: replace the bundled "org.apache.cayenne.util.Util" with a
patched one which uses Class.forName(className) into "getJavaClass()" as
last chance, instead of "Class.forName(className, true, classLoader)", keep
it as pre-last chance.

Bye

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Andrus Adamchik Hi, could you possibly try it with Cayenne 3.0M4? I think it should already be fixed there. Cheers, Andrus

Andrus Adamchik at Nov 24, 2008 at 7:40 am ⇧

Hi, could you possibly try it with Cayenne 3.0M4? I think it should
already be fixed there.

Cheers,
Andrus
On Nov 24, 2008, at 7:37 AM, rigel wrote:

rigel wrote:
Hello,
[...]
Going into the Cayenne source code I notice that the real message
thrown by
EntityResolver.constructCache() is "Failed to load class
org.someproject.orm.cayenne.SomeEntity:
org.someproject.orm.cayenne.SomeEntity"
Solved by myself, just for other people interested to use
URLClassLoader
with Cayenne: replace the bundled "org.apache.cayenne.util.Util"
with a
patched one which uses Class.forName(className) into
"getJavaClass()" as
last chance, instead of "Class.forName(className, true,
classLoader)", keep
it as pre-last chance.

Bye
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Rigel

at Nov 24, 2008 at 8:05 pm

⇧

Hi Andrus, first of all thank you for your great work :clap: .

Andrus Adamchik wrote:

Hi, could you possibly try it with Cayenne 3.0M4? I think it should
already be fixed there.

Yes of course, I try to put my small contribute for what I can.

This is the output (JDBC driver is the only jar pre-loaded into classpath
because differently by Cayenne 2 now (DriverDataSource.java:62) does not
solve the
class driver):

Loading lib: http://localhost:80/users/antares/libs/ashwood-2.0.jar
Loading lib: http://localhost:80/users/antares/libs/asm-3.0.jar
Loading lib: http://localhost:80/users/antares/libs/asm-commons-3.0.jar
Loading lib:
http://localhost:80/users/antares/libs/commons-collections-3.1.jar
Loading lib: http://localhost:80/users/antares/libs/commons-logging-1.1.jar
Loading lib:
http://localhost:80/users/antares/libs/geronimo-jpa_3.0_spec-1.0.jar
Loading lib: http://localhost:80/users/antares/libs/velocity-1.3.jar
Loading lib: http://localhost:80/users/antares/libs/cayenne-agent-3.0M4.jar
Loading lib: http://localhost:80/users/antares/libs/cayenne-client-3.0M4.jar
Loading lib:
http://localhost:80/users/antares/libs/cayenne-modeler-3.0M4.jar
Loading lib: http://localhost:80/users/antares/libs/cayenne-server-3.0M4.jar
Loading lib: http://localhost:80/users/antares/libs/w3d-base.jar
Loading lib: http://localhost:80/users/antares/libs/w3d-orm.jar
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
startedLoading
INFO: started configuration loading.
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
shouldLoadDataDomain
INFO: loaded domain: dbw3d
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate loadDataMap
INFO: loaded .
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
shouldLoadDataNode
INFO: loading .
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
shouldLoadDataNode
INFO: using factory: org.apache.cayenne.conf.DriverDataSourceFactory
24-nov-2008 20.20.13 org.apache.cayenne.conf.DriverDataSourceFactory load
INFO: loading driver information from 'dbw3dNode.driver.xml'.
24-nov-2008 20.20.13
org.apache.cayenne.conf.DriverDataSourceFactory$DriverHandler init
INFO: loading driver org.postgresql.Driver
24-nov-2008 20.20.13
org.apache.cayenne.conf.DriverDataSourceFactory$LoginHandler init
INFO: loading user name and password.
java.lang.ClassNotFoundException:
org.apache.cayenne.conf.PlainTextPasswordEncoder
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at
org.apache.cayenne.conn.DataSourceInfo.getPasswordEncoder(DataSourceInfo.java:207)
at
org.apache.cayenne.conf.DriverDataSourceFactory$LoginHandler.init(DriverDataSourceFactory.java:324)
at
org.apache.cayenne.conf.DriverDataSourceFactory$DriverHandler.startElement(DriverDataSourceFactory.java:191)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown
Source)
at
org.apache.cayenne.conf.DriverDataSourceFactory.load(DriverDataSourceFactory.java:130)
at
org.apache.cayenne.conf.DriverDataSourceFactory.getDataSource(DriverDataSourceFactory.java:78)
at
org.apache.cayenne.conf.RuntimeLoadDelegate.shouldLoadDataNode(RuntimeLoadDelegate.java:299)
at
org.apache.cayenne.conf.ConfigLoader$NodeHandler.init(ConfigLoader.java:337)
at
org.apache.cayenne.conf.ConfigLoader$DomainHandler.startElement(ConfigLoader.java:223)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown
Source)
at org.apache.cayenne.conf.ConfigLoader.loadDomains(ConfigLoader.java:79)
at
org.apache.cayenne.conf.DefaultConfiguration.initialize(DefaultConfiguration.java:164)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:157)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:139)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:119)
at
org.apache.cayenne.conf.Configuration.getSharedConfiguration(Configuration.java:89)
at
org.apache.cayenne.access.DataContext.createDataContext(DataContext.java:162)
at it.wipidea.w3d.SomeClass.init(SomeClass.java:42)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at NetLoader.start(NetLoader.java:65)
at NetLoader.main(NetLoader.java:76)
24-nov-2008 20.20.13 org.apache.cayenne.access.QueryLogger logPoolCreated
INFO: Created connection pool: jdbc:postgresql://localhost/w3d
Driver class: org.postgresql.Driver
Min. connections in the pool: 1
Max. connections in the pool: 1
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
shouldLoadDataNode
INFO: loaded datasource.
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate initAdapter
INFO: no adapter set, using automatic adapter.
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
shouldLinkDataMap
INFO: loaded map-ref: dbw3dMap.
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
finishedLoading
INFO: finished configuration loading in 142 ms.
24-nov-2008 20.20.13 org.apache.cayenne.access.QueryLogger logQueryStart
INFO: --- will run 1 query.
24-nov-2008 20.20.13 org.apache.cayenne.access.QueryLogger logConnect
INFO: Opening connection: jdbc:postgresql://localhost/w3d
Login: postgres
Password: *******
24-nov-2008 20.20.13 org.apache.cayenne.access.QueryLogger logConnectSuccess
INFO: +++ Connecting: SUCCESS.
24-nov-2008 20.20.13 org.apache.cayenne.access.QueryLogger
logBeginTransaction
INFO: --- transaction started.
24-nov-2008 20.20.13 org.apache.cayenne.access.QueryLogger log
INFO: Detected and installed adapter:
org.apache.cayenne.dba.postgres.PostgresAdapter
24-nov-2008 20.20.13 org.apache.cayenne.access.QueryLogger logQueryError
INFO: *** error.
java.lang.ClassNotFoundException: it.weev.orm.cayenne.dbw3d.matlibs
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.apache.cayenne.util.Util.getJavaClass(Util.java:589)
at org.apache.cayenne.map.ObjEntity.getJavaClass(ObjEntity.java:271)
at
org.apache.cayenne.reflect.PersistentDescriptorFactory.getDescriptor(PersistentDescriptorFactory.java:57)
at
org.apache.cayenne.reflect.ClassDescriptorMap.createDescriptor(ClassDescriptorMap.java:129)
at
org.apache.cayenne.reflect.LazyClassDescriptorDecorator.checkDescriptorInitialized(LazyClassDescriptorDecorator.java:51)
at
org.apache.cayenne.reflect.LazyClassDescriptorDecorator.getEntity(LazyClassDescriptorDecorator.java:75)
at
org.apache.cayenne.access.trans.SelectTranslator.appendQueryColumns(SelectTranslator.java:267)
at
org.apache.cayenne.access.trans.SelectTranslator.buildResultColumns(SelectTranslator.java:240)
at
org.apache.cayenne.access.trans.SelectTranslator.createSqlString(SelectTranslator.java:103)
at
org.apache.cayenne.dba.postgres.PostgresSelectTranslator.createSqlString(PostgresSelectTranslator.java:32)
at
org.apache.cayenne.access.trans.QueryAssembler.createStatement(QueryAssembler.java:116)
at
org.apache.cayenne.access.jdbc.SelectAction.performAction(SelectAction.java:72)
at
org.apache.cayenne.access.DataNodeQueryAction.runQuery(DataNodeQueryAction.java:58)
at org.apache.cayenne.access.DataNode.performQueries(DataNode.java:230)
at
org.apache.cayenne.access.DataDomainQueryAction.runQuery(DataDomainQueryAction.java:424)
at
org.apache.cayenne.access.DataDomainQueryAction.access$000(DataDomainQueryAction.java:68)
at
org.apache.cayenne.access.DataDomainQueryAction$2.transform(DataDomainQueryAction.java:397)
at
org.apache.cayenne.access.DataDomain.runInTransaction(DataDomain.java:847)
at
org.apache.cayenne.access.DataDomainQueryAction.runQueryInTransaction(DataDomainQueryAction.java:394)
at
org.apache.cayenne.access.DataDomainQueryAction.execute(DataDomainQueryAction.java:120)
at org.apache.cayenne.access.DataDomain.onQuery(DataDomain.java:740)
at
org.apache.cayenne.util.ObjectContextQueryAction.runQuery(ObjectContextQueryAction.java:317)
at
org.apache.cayenne.util.ObjectContextQueryAction.execute(ObjectContextQueryAction.java:96)
at org.apache.cayenne.access.DataContext.onQuery(DataContext.java:1336)
at
org.apache.cayenne.access.DataContext.performQuery(DataContext.java:1325)
at it.wipidea.w3d.SomeClass.init(SomeClass.java:45)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at NetLoader.start(NetLoader.java:65)
at NetLoader.main(NetLoader.java:76)
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at NetLoader.start(NetLoader.java:65)
at NetLoader.main(NetLoader.java:76)
Caused by: org.apache.cayenne.CayenneRuntimeException: [v.3.0M4 May 18 2008
15:29:33] Query exception.
at
org.apache.cayenne.access.DataDomainQueryAction.nextQueryException(DataDomainQueryAction.java:551)
at org.apache.cayenne.access.DataNode.performQueries(DataNode.java:237)
at
org.apache.cayenne.access.DataDomainQueryAction.runQuery(DataDomainQueryAction.java:424)
at
org.apache.cayenne.access.DataDomainQueryAction.access$000(DataDomainQueryAction.java:68)
at
org.apache.cayenne.access.DataDomainQueryAction$2.transform(DataDomainQueryAction.java:397)
at
org.apache.cayenne.access.DataDomain.runInTransaction(DataDomain.java:847)
at
org.apache.cayenne.access.DataDomainQueryAction.runQueryInTransaction(DataDomainQueryAction.java:394)
at
org.apache.cayenne.access.DataDomainQueryAction.execute(DataDomainQueryAction.java:120)
at org.apache.cayenne.access.DataDomain.onQuery(DataDomain.java:740)
at
org.apache.cayenne.util.ObjectContextQueryAction.runQuery(ObjectContextQueryAction.java:317)
at
org.apache.cayenne.util.ObjectContextQueryAction.execute(ObjectContextQueryAction.java:96)
at org.apache.cayenne.access.DataContext.onQuery(DataContext.java:1336)
at
org.apache.cayenne.access.DataContext.performQuery(DataContext.java:1325)
at it.wipidea.w3d.SomeClass.init(SomeClass.java:45)
... 6 more
Caused by: java.lang.ClassNotFoundException:
it.weev.orm.cayenne.dbw3d.matlibs
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.apache.cayenne.util.Util.getJavaClass(Util.java:589)
at org.apache.cayenne.map.ObjEntity.getJavaClass(ObjEntity.java:271)
at
org.apache.cayenne.reflect.PersistentDescriptorFactory.getDescriptor(PersistentDescriptorFactory.java:57)
at
org.apache.cayenne.reflect.ClassDescriptorMap.createDescriptor(ClassDescriptorMap.java:129)
at
org.apache.cayenne.reflect.LazyClassDescriptorDecorator.checkDescriptorInitialized(LazyClassDescriptorDecorator.java:51)
at
org.apache.cayenne.reflect.LazyClassDescriptorDecorator.getEntity(LazyClassDescriptorDecorator.java:75)
at
org.apache.cayenne.access.trans.SelectTranslator.appendQueryColumns(SelectTranslator.java:267)
at
org.apache.cayenne.access.trans.SelectTranslator.buildResultColumns(SelectTranslator.java:240)
at
org.apache.cayenne.access.trans.SelectTranslator.createSqlString(SelectTranslator.java:103)
at
org.apache.cayenne.dba.postgres.PostgresSelectTranslator.createSqlString(PostgresSelectTranslator.java:32)
at
org.apache.cayenne.access.trans.QueryAssembler.createStatement(QueryAssembler.java:116)
at
org.apache.cayenne.access.jdbc.SelectAction.performAction(SelectAction.java:72)
at
org.apache.cayenne.access.DataNodeQueryAction.runQuery(DataNodeQueryAction.java:58)
at org.apache.cayenne.access.DataNode.performQueries(DataNode.java:230)
... 18 more

This is my netloader code:

import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.ResourceBundle;
import java.util.TreeMap;

public final class NetLoader {

final static private ResourceBundle RB;
static {
RB = ResourceBundle.getBundle(
//"loader-2_0_4"
"loader-3_M4"
);
}

private URL[] libUrls;

public NetLoader() {
this.initLibrary();
}

private void initLibrary() {
TreeMap libs = new TreeMap();
Enumeration en = RB.getKeys();
while (en.hasMoreElements()) {
String key = en.nextElement();
libs.put(key,RB.getString(key).split(","));
}
libUrls = new URL[libs.size()];
Iterator it = libs.keySet().iterator();
int idx = 0;
while (it.hasNext()) {
String key = it.next();
URL url = null;
try {
url = new URL(libs.get(key)[0],libs.get(key)[1],libs.get(key)[2]);
} catch (MalformedURLException e) {
System.err.println(e.getMessage());
System.exit(1);
}
libUrls[idx++] = url;
int port = (url.getPort()==-1) ? 80 : url.getPort() ;
System.out.println("Loading lib: " +
url.getProtocol()+"://"+url.getHost()+":"+port+url.getFile());
}

}

protected void start() {
URLClassLoader urlClassLoader = new URLClassLoader(libUrls,
Thread.currentThread().getContextClassLoader()
//ClassLoader.getSystemClassLoader()
);

try {
Class<?> clzz =
Class.forName("it.wipidea.w3d.SomeClass",true,urlClassLoader);
//Class<?> clzz = urlClassLoader.loadClass("it.wipidea.w3d.SomeClass");
Method m = clzz.getDeclaredMethod("init", new Class[]{});
m.invoke(null, new Object[]{});
} catch (Throwable e) {
e.printStackTrace();
}
}

/**
* @param args
*/
public static void main(String[] args) {
NetLoader netLoader = new NetLoader();
netLoader.start();
}

}

And this is the property file used to load all libs:

## Cayenne III
#libs.001 = http,localhost,/users/antares/libs/postgresql-8.2-504.jdbc4.jar
libs.011 = http,localhost,/users/antares/libs/ashwood-2.0.jar
libs.012 = http,localhost,/users/antares/libs/asm-3.0.jar
libs.013 = http,localhost,/users/antares/libs/asm-commons-3.0.jar

libs.014 = http,localhost,/users/antares/libs/commons-collections-3.1.jar
libs.015 = http,localhost,/users/antares/libs/commons-logging-1.1.jar
libs.016 = http,localhost,/users/antares/libs/geronimo-jpa_3.0_spec-1.0.jar
libs.017 = http,localhost,/users/antares/libs/velocity-1.3.jar

libs.021 = http,localhost,/users/antares/libs/cayenne-agent-3.0M4.jar
libs.022 = http,localhost,/users/antares/libs/cayenne-client-3.0M4.jar
libs.023 = http,localhost,/users/antares/libs/cayenne-modeler-3.0M4.jar
libs.024 = http,localhost,/users/antares/libs/cayenne-server-3.0M4.jar

libs.031 = http,localhost,/users/antares/libs/w3d-base.jar
libs.032 = http,localhost,/users/antares/libs/w3d-orm.jar

## Cayenne II
#libs.001 = http,localhost,/users/antares/libs/postgresql-8.2-504.jdbc4.jar
#libs.011 = http,localhost,/users/antares/libs/cayenne-2_0_4-util.jar
#libs.021 = http,localhost,/users/antares/libs/w3d-base.jar
#libs.022 = http,localhost,/users/antares/libs/w3d-orm.jar

Currently I am not able to pass all Maven test to build Cayenne,
so I don't know if the "Class.forName(className)" allows the Util.class
to solve all classes in the URLLoaderClasspath.

Hoping can be useful, sorry for long long post :wistle: :-P.

Best Regards.

Andrus Adamchik wrote:

Hi, could you possibly try it with Cayenne 3.0M4? I think it should
already be fixed there.

Cheers,
Andrus

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Sent from the Cayenne - User mailing list archive at Nabble.com.

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reply | permalink

Scott Anderson

at Nov 24, 2008 at 8:20 pm

⇧

Incidentally, you can load the JDBC driver at runtime; you don't have to
have it on the CP. You'll have to wrap it with a shim loaded by the
system CL, though, because DriverManager will choke on the non-system
CL, for whatever reason. http://www.kfu.com/~nsayer/Java/dyn-jdbc.html

Toss the shim'd driver in to the DriverManager, and pass null to Cayenne
for the driver (which tells it to ask DriverManager for a driver), and
you should be good to go. You can see an example of my DataSourceFactory
here:
http://bnubot.googlecode.com/svn/trunk/BNUBot/src/net/bnubot/db/conf/Cay
enneConfiguration.java

-----Original Message-----
From: rigel
Sent: Monday, November 24, 2008 3:05 PM
To: [email protected]
Subject: Re: Loading cayenne mapped class from URLClassLoader

Hi Andrus, first of all thank you for your great work :clap: .

Andrus Adamchik wrote:

Hi, could you possibly try it with Cayenne 3.0M4? I think it should
already be fixed there.

Yes of course, I try to put my small contribute for what I can.

This is the output (JDBC driver is the only jar pre-loaded into
classpath
because differently by Cayenne 2 now (DriverDataSource.java:62) does not
solve the
class driver):

Loading lib: http://localhost:80/users/antares/libs/ashwood-2.0.jar
Loading lib: http://localhost:80/users/antares/libs/asm-3.0.jar
Loading lib: http://localhost:80/users/antares/libs/asm-commons-3.0.jar
Loading lib:
http://localhost:80/users/antares/libs/commons-collections-3.1.jar
Loading lib:
http://localhost:80/users/antares/libs/commons-logging-1.1.jar
Loading lib:
http://localhost:80/users/antares/libs/geronimo-jpa_3.0_spec-1.0.jar
Loading lib: http://localhost:80/users/antares/libs/velocity-1.3.jar
Loading lib:
http://localhost:80/users/antares/libs/cayenne-agent-3.0M4.jar
Loading lib:
http://localhost:80/users/antares/libs/cayenne-client-3.0M4.jar
Loading lib:
http://localhost:80/users/antares/libs/cayenne-modeler-3.0M4.jar
Loading lib:
http://localhost:80/users/antares/libs/cayenne-server-3.0M4.jar
Loading lib: http://localhost:80/users/antares/libs/w3d-base.jar
Loading lib: http://localhost:80/users/antares/libs/w3d-orm.jar
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
startedLoading
INFO: started configuration loading.
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
shouldLoadDataDomain
INFO: loaded domain: dbw3d
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
loadDataMap
INFO: loaded .
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
shouldLoadDataNode
INFO: loading .
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
shouldLoadDataNode
INFO: using factory: org.apache.cayenne.conf.DriverDataSourceFactory
24-nov-2008 20.20.13 org.apache.cayenne.conf.DriverDataSourceFactory
load
INFO: loading driver information from 'dbw3dNode.driver.xml'.
24-nov-2008 20.20.13
org.apache.cayenne.conf.DriverDataSourceFactory$DriverHandler init
INFO: loading driver org.postgresql.Driver
24-nov-2008 20.20.13
org.apache.cayenne.conf.DriverDataSourceFactory$LoginHandler init
INFO: loading user name and password.
java.lang.ClassNotFoundException:
org.apache.cayenne.conf.PlainTextPasswordEncoder
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at
org.apache.cayenne.conn.DataSourceInfo.getPasswordEncoder(DataSourceInfo
.java:207)
at
org.apache.cayenne.conf.DriverDataSourceFactory$LoginHandler.init(Driver
DataSourceFactory.java:324)
at
org.apache.cayenne.conf.DriverDataSourceFactory$DriverHandler.startEleme
nt(DriverDataSourceFactory.java:191)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElemen
t(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emp
tyElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanSta
rtElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$F
ragmentContentDriver.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unkn
own
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Un
known
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.s
canDocument(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unkn
own
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unkn
own
Source)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unkno
wn
Source)
at
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.pars
e(Unknown
Source)
at
org.apache.cayenne.conf.DriverDataSourceFactory.load(DriverDataSourceFac
tory.java:130)
at
org.apache.cayenne.conf.DriverDataSourceFactory.getDataSource(DriverData
SourceFactory.java:78)
at
org.apache.cayenne.conf.RuntimeLoadDelegate.shouldLoadDataNode(RuntimeLo
adDelegate.java:299)
at
org.apache.cayenne.conf.ConfigLoader$NodeHandler.init(ConfigLoader.java:
337)
at
org.apache.cayenne.conf.ConfigLoader$DomainHandler.startElement(ConfigLo
ader.java:223)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElemen
t(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanSta
rtElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$F
ragmentContentDriver.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unkn
own
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Un
known
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.s
canDocument(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unkn
own
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unkn
own
Source)
at
com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unkno
wn
Source)
at
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.pars
e(Unknown
Source)
at
org.apache.cayenne.conf.ConfigLoader.loadDomains(ConfigLoader.java:79)
at
org.apache.cayenne.conf.DefaultConfiguration.initialize(DefaultConfigura
tion.java:164)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Conf
iguration.java:157)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Conf
iguration.java:139)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Conf
iguration.java:119)
at
org.apache.cayenne.conf.Configuration.getSharedConfiguration(Configurati
on.java:89)
at
org.apache.cayenne.access.DataContext.createDataContext(DataContext.java
:162)
at it.wipidea.w3d.SomeClass.init(SomeClass.java:42)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown
Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at NetLoader.start(NetLoader.java:65)
at NetLoader.main(NetLoader.java:76)
24-nov-2008 20.20.13 org.apache.cayenne.access.QueryLogger
logPoolCreated
INFO: Created connection pool: jdbc:postgresql://localhost/w3d
Driver class: org.postgresql.Driver
Min. connections in the pool: 1
Max. connections in the pool: 1
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
shouldLoadDataNode
INFO: loaded datasource.
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
initAdapter
INFO: no adapter set, using automatic adapter.
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
shouldLinkDataMap
INFO: loaded map-ref: dbw3dMap.
24-nov-2008 20.20.13 org.apache.cayenne.conf.RuntimeLoadDelegate
finishedLoading
INFO: finished configuration loading in 142 ms.
24-nov-2008 20.20.13 org.apache.cayenne.access.QueryLogger logQueryStart
INFO: --- will run 1 query.
24-nov-2008 20.20.13 org.apache.cayenne.access.QueryLogger logConnect
INFO: Opening connection: jdbc:postgresql://localhost/w3d
Login: postgres
Password: *******
24-nov-2008 20.20.13 org.apache.cayenne.access.QueryLogger
logConnectSuccess
INFO: +++ Connecting: SUCCESS.
24-nov-2008 20.20.13 org.apache.cayenne.access.QueryLogger
logBeginTransaction
INFO: --- transaction started.
24-nov-2008 20.20.13 org.apache.cayenne.access.QueryLogger log
INFO: Detected and installed adapter:
org.apache.cayenne.dba.postgres.PostgresAdapter
24-nov-2008 20.20.13 org.apache.cayenne.access.QueryLogger logQueryError
INFO: *** error.
java.lang.ClassNotFoundException: it.weev.orm.cayenne.dbw3d.matlibs
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.apache.cayenne.util.Util.getJavaClass(Util.java:589)
at
org.apache.cayenne.map.ObjEntity.getJavaClass(ObjEntity.java:271)
at
org.apache.cayenne.reflect.PersistentDescriptorFactory.getDescriptor(Per
sistentDescriptorFactory.java:57)
at
org.apache.cayenne.reflect.ClassDescriptorMap.createDescriptor(ClassDesc
riptorMap.java:129)
at
org.apache.cayenne.reflect.LazyClassDescriptorDecorator.checkDescriptorI
nitialized(LazyClassDescriptorDecorator.java:51)
at
org.apache.cayenne.reflect.LazyClassDescriptorDecorator.getEntity(LazyCl
assDescriptorDecorator.java:75)
at
org.apache.cayenne.access.trans.SelectTranslator.appendQueryColumns(Sele
ctTranslator.java:267)
at
org.apache.cayenne.access.trans.SelectTranslator.buildResultColumns(Sele
ctTranslator.java:240)
at
org.apache.cayenne.access.trans.SelectTranslator.createSqlString(SelectT
ranslator.java:103)
at
org.apache.cayenne.dba.postgres.PostgresSelectTranslator.createSqlString
(PostgresSelectTranslator.java:32)
at
org.apache.cayenne.access.trans.QueryAssembler.createStatement(QueryAsse
mbler.java:116)
at
org.apache.cayenne.access.jdbc.SelectAction.performAction(SelectAction.j
ava:72)
at
org.apache.cayenne.access.DataNodeQueryAction.runQuery(DataNodeQueryActi
on.java:58)
at
org.apache.cayenne.access.DataNode.performQueries(DataNode.java:230)
at
org.apache.cayenne.access.DataDomainQueryAction.runQuery(DataDomainQuery
Action.java:424)
at
org.apache.cayenne.access.DataDomainQueryAction.access$000(DataDomainQue
ryAction.java:68)
at
org.apache.cayenne.access.DataDomainQueryAction$2.transform(DataDomainQu
eryAction.java:397)
at
org.apache.cayenne.access.DataDomain.runInTransaction(DataDomain.java:84
7)
at
org.apache.cayenne.access.DataDomainQueryAction.runQueryInTransaction(Da
taDomainQueryAction.java:394)
at
org.apache.cayenne.access.DataDomainQueryAction.execute(DataDomainQueryA
ction.java:120)
at
org.apache.cayenne.access.DataDomain.onQuery(DataDomain.java:740)
at
org.apache.cayenne.util.ObjectContextQueryAction.runQuery(ObjectContextQ
ueryAction.java:317)
at
org.apache.cayenne.util.ObjectContextQueryAction.execute(ObjectContextQu
eryAction.java:96)
at
org.apache.cayenne.access.DataContext.onQuery(DataContext.java:1336)
at
org.apache.cayenne.access.DataContext.performQuery(DataContext.java:1325
)
at it.wipidea.w3d.SomeClass.init(SomeClass.java:45)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown
Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at NetLoader.start(NetLoader.java:65)
at NetLoader.main(NetLoader.java:76)
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown
Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at NetLoader.start(NetLoader.java:65)
at NetLoader.main(NetLoader.java:76)
Caused by: org.apache.cayenne.CayenneRuntimeException: [v.3.0M4 May 18
2008
15:29:33] Query exception.
at
org.apache.cayenne.access.DataDomainQueryAction.nextQueryException(DataD
omainQueryAction.java:551)
at
org.apache.cayenne.access.DataNode.performQueries(DataNode.java:237)
at
org.apache.cayenne.access.DataDomainQueryAction.runQuery(DataDomainQuery
Action.java:424)
at
org.apache.cayenne.access.DataDomainQueryAction.access$000(DataDomainQue
ryAction.java:68)
at
org.apache.cayenne.access.DataDomainQueryAction$2.transform(DataDomainQu
eryAction.java:397)
at
org.apache.cayenne.access.DataDomain.runInTransaction(DataDomain.java:84
7)
at
org.apache.cayenne.access.DataDomainQueryAction.runQueryInTransaction(Da
taDomainQueryAction.java:394)
at
org.apache.cayenne.access.DataDomainQueryAction.execute(DataDomainQueryA
ction.java:120)
at
org.apache.cayenne.access.DataDomain.onQuery(DataDomain.java:740)
at
org.apache.cayenne.util.ObjectContextQueryAction.runQuery(ObjectContextQ
ueryAction.java:317)
at
org.apache.cayenne.util.ObjectContextQueryAction.execute(ObjectContextQu
eryAction.java:96)
at
org.apache.cayenne.access.DataContext.onQuery(DataContext.java:1336)
at
org.apache.cayenne.access.DataContext.performQuery(DataContext.java:1325
)
at it.wipidea.w3d.SomeClass.init(SomeClass.java:45)
... 6 more
Caused by: java.lang.ClassNotFoundException:
it.weev.orm.cayenne.dbw3d.matlibs
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at org.apache.cayenne.util.Util.getJavaClass(Util.java:589)
at
org.apache.cayenne.map.ObjEntity.getJavaClass(ObjEntity.java:271)
at
org.apache.cayenne.reflect.PersistentDescriptorFactory.getDescriptor(Per
sistentDescriptorFactory.java:57)
at
org.apache.cayenne.reflect.ClassDescriptorMap.createDescriptor(ClassDesc
riptorMap.java:129)
at
org.apache.cayenne.reflect.LazyClassDescriptorDecorator.checkDescriptorI
nitialized(LazyClassDescriptorDecorator.java:51)
at
org.apache.cayenne.reflect.LazyClassDescriptorDecorator.getEntity(LazyCl
assDescriptorDecorator.java:75)
at
org.apache.cayenne.access.trans.SelectTranslator.appendQueryColumns(Sele
ctTranslator.java:267)
at
org.apache.cayenne.access.trans.SelectTranslator.buildResultColumns(Sele
ctTranslator.java:240)
at
org.apache.cayenne.access.trans.SelectTranslator.createSqlString(SelectT
ranslator.java:103)
at
org.apache.cayenne.dba.postgres.PostgresSelectTranslator.createSqlString
(PostgresSelectTranslator.java:32)
at
org.apache.cayenne.access.trans.QueryAssembler.createStatement(QueryAsse
mbler.java:116)
at
org.apache.cayenne.access.jdbc.SelectAction.performAction(SelectAction.j
ava:72)
at
org.apache.cayenne.access.DataNodeQueryAction.runQuery(DataNodeQueryActi
on.java:58)
at
org.apache.cayenne.access.DataNode.performQueries(DataNode.java:230)
... 18 more

This is my netloader code:

import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.ResourceBundle;
import java.util.TreeMap;

public final class NetLoader {

final static private ResourceBundle RB;
static {
RB = ResourceBundle.getBundle(
//"loader-2_0_4"
"loader-3_M4"
);
}

private URL[] libUrls;

public NetLoader() {
this.initLibrary();
}

private void initLibrary() {
TreeMap libs = new TreeMap();
Enumeration en = RB.getKeys();
while (en.hasMoreElements()) {
String key = en.nextElement();
libs.put(key,RB.getString(key).split(","));
}
libUrls = new URL[libs.size()];
Iterator it = libs.keySet().iterator();
int idx = 0;
while (it.hasNext()) {
String key = it.next();
URL url = null;
try {
url = new
URL(libs.get(key)[0],libs.get(key)[1],libs.get(key)[2]);
} catch (MalformedURLException e) {
System.err.println(e.getMessage());
System.exit(1);
}
libUrls[idx++] = url;
int port = (url.getPort()==-1) ? 80 :
url.getPort() ;
System.out.println("Loading lib: " +
url.getProtocol()+"://"+url.getHost()+":"+port+url.getFile());
}

}

protected void start() {
URLClassLoader urlClassLoader = new
URLClassLoader(libUrls,

Thread.currentThread().getContextClassLoader()
//ClassLoader.getSystemClassLoader()
);

try {
Class<?> clzz =
Class.forName("it.wipidea.w3d.SomeClass",true,urlClassLoader);
//Class<?> clzz =
urlClassLoader.loadClass("it.wipidea.w3d.SomeClass");
Method m = clzz.getDeclaredMethod("init", new
Class[]{});
m.invoke(null, new Object[]{});
} catch (Throwable e) {
e.printStackTrace();
}
}

/**
* @param args
*/
public static void main(String[] args) {
NetLoader netLoader = new NetLoader();
netLoader.start();
}

}

And this is the property file used to load all libs:

## Cayenne III
#libs.001 =
http,localhost,/users/antares/libs/postgresql-8.2-504.jdbc4.jar
libs.011 = http,localhost,/users/antares/libs/ashwood-2.0.jar
libs.012 = http,localhost,/users/antares/libs/asm-3.0.jar
libs.013 = http,localhost,/users/antares/libs/asm-commons-3.0.jar

libs.014 =
http,localhost,/users/antares/libs/commons-collections-3.1.jar
libs.015 = http,localhost,/users/antares/libs/commons-logging-1.1.jar
libs.016 =
http,localhost,/users/antares/libs/geronimo-jpa_3.0_spec-1.0.jar
libs.017 = http,localhost,/users/antares/libs/velocity-1.3.jar

libs.021 = http,localhost,/users/antares/libs/cayenne-agent-3.0M4.jar
libs.022 = http,localhost,/users/antares/libs/cayenne-client-3.0M4.jar
libs.023 = http,localhost,/users/antares/libs/cayenne-modeler-3.0M4.jar
libs.024 = http,localhost,/users/antares/libs/cayenne-server-3.0M4.jar

libs.031 = http,localhost,/users/antares/libs/w3d-base.jar
libs.032 = http,localhost,/users/antares/libs/w3d-orm.jar

## Cayenne II
#libs.001 =
http,localhost,/users/antares/libs/postgresql-8.2-504.jdbc4.jar
#libs.011 = http,localhost,/users/antares/libs/cayenne-2_0_4-util.jar
#libs.021 = http,localhost,/users/antares/libs/w3d-base.jar
#libs.022 = http,localhost,/users/antares/libs/w3d-orm.jar

Currently I am not able to pass all Maven test to build Cayenne,
so I don't know if the "Class.forName(className)" allows the Util.class
to solve all classes in the URLLoaderClasspath.

Hoping can be useful, sorry for long long post :wistle: :-P.

Best Regards.

Andrus Adamchik wrote:

Hi, could you possibly try it with Cayenne 3.0M4? I think it should
already be fixed there.

Cheers,
Andrus

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reply | permalink

Rigel

at Nov 24, 2008 at 11:47 pm

⇧

Tnx, this approach for driver loading sounds really more comfortable than
mine of heavily using reflection.

Scott A wrote:

Incidentally, you can load the JDBC driver at runtime; you don't have to
have it on the CP. You'll have to wrap it with a shim loaded by the
system CL, though, because DriverManager will choke on the non-system
CL, for whatever reason. http://www.kfu.com/~nsayer/Java/dyn-jdbc.html
Toss the shim'd driver in to the DriverManager, and pass null to Cayenne
for the driver (which tells it to ask DriverManager for a driver), and
you should be good to go. You can see an example of my DataSourceFactory
here:
http://bnubot.googlecode.com/svn/trunk/BNUBot/src/net/bnubot/db/conf/Cay
enneConfiguration.java

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reply | permalink

Michael Gentry

at Nov 24, 2008 at 9:29 pm

⇧

From your stack trace:

INFO: loading user name and password.
java.lang.ClassNotFoundException:
org.apache.cayenne.conf.PlainTextPasswordEncoder
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at
org.apache.cayenne.conn.DataSourceInfo.getPasswordEncoder(DataSourceInfo.java:207)

It appears that it can't find the PlainTextPasswordEncoder class,
which should be present. It is the default encoder. Is this class
somehow not in your JAR?

Thanks!

/dev/mrg

reply | permalink

Rigel

at Nov 24, 2008 at 11:24 pm

⇧

Michael Gentry wrote:

PlainTextPasswordEncoder ... Is this class somehow not in your JAR?

No, it's present under the jar named cayenne-server-3.0M4.jar.

It follows the stacktrace produced when I load the JDBC driver too into the
URLClassLoader.
As you can notice the ClassNotFound arise from driverClass =
Class.forName(driverClassName,
true,Thread.currentThread().getContextClassLoader()); into
"DriverDataSource.java:62".

Also PlainTextPasswordEncoder use the same call to retrieve its
ClassLoader, but just yesterday I noticed that URLClassLoader inherit from
ClassLoader and not vice versa, probably for security reason. For this
reason when I call "ClassLoader.getSystemClassLoader()" or
"Thread.currentThread().getContextClassLoader()" I get only the clean
classpath at startup, as direct consequence every JAR appears isolated from
others when using standard ClassLoader invokation.

So when using URLClassLoader the only way I found to turn around this
problem is to put a call of Class.forName(className) without specifying any
ClassLoader directly into the first catch of the main try for
Class.forName(String,boolean,ClassLoader) call. As note with Cayenne 2 this
supplementary call into the catch works well without any interference.

JDBC driver loaded via URLClassLoader

Loading lib:
http://localhost:80/users/antares/libs/postgresql-8.2-504.jdbc4.jar
Loading lib: http://localhost:80/users/antares/libs/ashwood-2.0.jar
Loading lib: http://localhost:80/users/antares/libs/asm-3.0.jar
Loading lib: http://localhost:80/users/antares/libs/asm-commons-3.0.jar
Loading lib:
http://localhost:80/users/antares/libs/commons-collections-3.1.jar
Loading lib: http://localhost:80/users/antares/libs/commons-logging-1.1.jar
Loading lib:
http://localhost:80/users/antares/libs/geronimo-jpa_3.0_spec-1.0.jar
Loading lib: http://localhost:80/users/antares/libs/velocity-1.3.jar
Loading lib: http://localhost:80/users/antares/libs/cayenne-agent-3.0M4.jar
Loading lib: http://localhost:80/users/antares/libs/cayenne-client-3.0M4.jar
Loading lib:
http://localhost:80/users/antares/libs/cayenne-modeler-3.0M4.jar
Loading lib: http://localhost:80/users/antares/libs/cayenne-server-3.0M4.jar
Loading lib: http://localhost:80/users/antares/libs/w3d-base.jar
Loading lib: http://localhost:80/users/antares/libs/w3d-orm.jar
24-nov-2008 23.48.02 org.apache.cayenne.conf.RuntimeLoadDelegate
startedLoading
INFO: started configuration loading.
24-nov-2008 23.48.02 org.apache.cayenne.conf.RuntimeLoadDelegate
shouldLoadDataDomain
INFO: loaded domain: dbw3d
24-nov-2008 23.48.02 org.apache.cayenne.conf.RuntimeLoadDelegate loadDataMap
INFO: loaded .
24-nov-2008 23.48.02 org.apache.cayenne.conf.RuntimeLoadDelegate
shouldLoadDataNode
INFO: loading .
24-nov-2008 23.48.02 org.apache.cayenne.conf.RuntimeLoadDelegate
shouldLoadDataNode
INFO: using factory: org.apache.cayenne.conf.DriverDataSourceFactory
24-nov-2008 23.48.02 org.apache.cayenne.conf.DriverDataSourceFactory load
INFO: loading driver information from 'dbw3dNode.driver.xml'.
24-nov-2008 23.48.02
org.apache.cayenne.conf.DriverDataSourceFactory$DriverHandler init
INFO: loading driver org.postgresql.Driver
24-nov-2008 23.48.02
org.apache.cayenne.conf.DriverDataSourceFactory$LoginHandler init
INFO: loading user name and password.
java.lang.ClassNotFoundException:
org.apache.cayenne.conf.PlainTextPasswordEncoder
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at
org.apache.cayenne.conn.DataSourceInfo.getPasswordEncoder(DataSourceInfo.java:207)
at
org.apache.cayenne.conf.DriverDataSourceFactory$LoginHandler.init(DriverDataSourceFactory.java:324)
at
org.apache.cayenne.conf.DriverDataSourceFactory$DriverHandler.startElement(DriverDataSourceFactory.java:191)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.AbstractXMLDocumentParser.emptyElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown
Source)
at
org.apache.cayenne.conf.DriverDataSourceFactory.load(DriverDataSourceFactory.java:130)
at
org.apache.cayenne.conf.DriverDataSourceFactory.getDataSource(DriverDataSourceFactory.java:78)
at
org.apache.cayenne.conf.RuntimeLoadDelegate.shouldLoadDataNode(RuntimeLoadDelegate.java:299)
at
org.apache.cayenne.conf.ConfigLoader$NodeHandler.init(ConfigLoader.java:337)
at
org.apache.cayenne.conf.ConfigLoader$DomainHandler.startElement(ConfigLoader.java:223)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown
Source)
at org.apache.cayenne.conf.ConfigLoader.loadDomains(ConfigLoader.java:79)
at
org.apache.cayenne.conf.DefaultConfiguration.initialize(DefaultConfiguration.java:164)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:157)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:139)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:119)
at
org.apache.cayenne.conf.Configuration.getSharedConfiguration(Configuration.java:89)
at
org.apache.cayenne.access.DataContext.createDataContext(DataContext.java:162)
at it.wipidea.w3d.SomeClass.init(SomeClass.java:42)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at NetLoader.start(NetLoader.java:63)
at NetLoader.main(NetLoader.java:74)
24-nov-2008 23.48.02 org.apache.cayenne.access.QueryLogger logPoolCreated
INFO: Created connection pool: jdbc:postgresql://localhost/w3d
Driver class: org.postgresql.Driver
Min. connections in the pool: 1
Max. connections in the pool: 1
24-nov-2008 23.48.02 org.apache.cayenne.access.QueryLogger logConnectFailure
INFO: *** Connecting: FAILURE.
java.sql.SQLException: Can not load JDBC driver named
'org.postgresql.Driver': org.postgresql.Driver
at
org.apache.cayenne.conn.DriverDataSource.loadDriver(DriverDataSource.java:62)
at
org.apache.cayenne.conn.DriverDataSource.setDriverClassName(DriverDataSource.java:256)
at org.apache.cayenne.conn.DriverDataSource.(DriverDataSource.java:101)
at org.apache.cayenne.conn.DriverDataSource.(DriverDataSource.java:87)
at org.apache.cayenne.conn.PoolManager.(PoolManager.java:106)
at
org.apache.cayenne.conf.DriverDataSourceFactory.getDataSource(DriverDataSourceFactory.java:83)
at
org.apache.cayenne.conf.RuntimeLoadDelegate.shouldLoadDataNode(RuntimeLoadDelegate.java:299)
at
org.apache.cayenne.conf.ConfigLoader$NodeHandler.init(ConfigLoader.java:337)
at
org.apache.cayenne.conf.ConfigLoader$DomainHandler.startElement(ConfigLoader.java:223)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown
Source)
at org.apache.cayenne.conf.ConfigLoader.loadDomains(ConfigLoader.java:79)
at
org.apache.cayenne.conf.DefaultConfiguration.initialize(DefaultConfiguration.java:164)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:157)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:139)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:119)
at
org.apache.cayenne.conf.Configuration.getSharedConfiguration(Configuration.java:89)
at
org.apache.cayenne.access.DataContext.createDataContext(DataContext.java:162)
at it.wipidea.w3d.SomeClass.init(SomeClass.java:42)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at NetLoader.start(NetLoader.java:63)
at NetLoader.main(NetLoader.java:74)
24-nov-2008 23.48.02 org.apache.cayenne.conf.RuntimeLoadDelegate
shouldLoadDataNode
INFO: Error: DataSource load failed
java.sql.SQLException: Can not load JDBC driver named
'org.postgresql.Driver': org.postgresql.Driver
at
org.apache.cayenne.conn.DriverDataSource.loadDriver(DriverDataSource.java:62)
at
org.apache.cayenne.conn.DriverDataSource.setDriverClassName(DriverDataSource.java:256)
at org.apache.cayenne.conn.DriverDataSource.(DriverDataSource.java:101)
at org.apache.cayenne.conn.DriverDataSource.(DriverDataSource.java:87)
at org.apache.cayenne.conn.PoolManager.(PoolManager.java:106)
at
org.apache.cayenne.conf.DriverDataSourceFactory.getDataSource(DriverDataSourceFactory.java:83)
at
org.apache.cayenne.conf.RuntimeLoadDelegate.shouldLoadDataNode(RuntimeLoadDelegate.java:299)
at
org.apache.cayenne.conf.ConfigLoader$NodeHandler.init(ConfigLoader.java:337)
at
org.apache.cayenne.conf.ConfigLoader$DomainHandler.startElement(ConfigLoader.java:223)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown
Source)
at
com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown
Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown
Source)
at
com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown
Source)
at org.apache.cayenne.conf.ConfigLoader.loadDomains(ConfigLoader.java:79)
at
org.apache.cayenne.conf.DefaultConfiguration.initialize(DefaultConfiguration.java:164)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:157)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:139)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:119)
at
org.apache.cayenne.conf.Configuration.getSharedConfiguration(Configuration.java:89)
at
org.apache.cayenne.access.DataContext.createDataContext(DataContext.java:162)
at it.wipidea.w3d.SomeClass.init(SomeClass.java:42)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at NetLoader.start(NetLoader.java:63)
at NetLoader.main(NetLoader.java:74)
24-nov-2008 23.48.02 org.apache.cayenne.conf.RuntimeLoadDelegate initAdapter
INFO: no adapter set, using automatic adapter.
24-nov-2008 23.48.02 org.apache.cayenne.conf.RuntimeLoadDelegate
shouldLinkDataMap
INFO: loaded map-ref: dbw3dMap.
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at NetLoader.start(NetLoader.java:63)
at NetLoader.main(NetLoader.java:74)
Caused by: org.apache.cayenne.ConfigurationException: [v.3.0M4 May 18 2008
15:29:33] Error during Configuration initialization. [v.3.0M4 May 18 2008
15:29:33] Load failures. Main configuration class:
org.apache.cayenne.conf.DefaultConfiguration, details:
domain.node.name=dbw3dNode, domain.node.datasource=dbw3dNode.driver.xml,
reason: DataSource load failed - Can not load JDBC driver named
'org.postgresql.Driver': org.postgresql.Driver
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:166)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:139)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:119)
at
org.apache.cayenne.conf.Configuration.getSharedConfiguration(Configuration.java:89)
at
org.apache.cayenne.access.DataContext.createDataContext(DataContext.java:162)
at it.wipidea.w3d.SomeClass.init(SomeClass.java:42)
... 6 more
Caused by: org.apache.cayenne.ConfigurationException: [v.3.0M4 May 18 2008
15:29:33] Load failures. Main configuration class:
org.apache.cayenne.conf.DefaultConfiguration, details:
domain.node.name=dbw3dNode, domain.node.datasource=dbw3dNode.driver.xml,
reason: DataSource load failed - Can not load JDBC driver named
'org.postgresql.Driver': org.postgresql.Driver
at
org.apache.cayenne.conf.RuntimeLoadDelegate.finishedLoading(RuntimeLoadDelegate.java:454)
at org.apache.cayenne.conf.ConfigLoader.loadDomains(ConfigLoader.java:80)
at
org.apache.cayenne.conf.DefaultConfiguration.initialize(DefaultConfiguration.java:164)
at
org.apache.cayenne.conf.Configuration.initializeSharedConfiguration(Configuration.java:157)
... 11 more

Michael Gentry wrote:

From your stack trace:

INFO: loading user name and password.
java.lang.ClassNotFoundException:
org.apache.cayenne.conf.PlainTextPasswordEncoder
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at
org.apache.cayenne.conn.DataSourceInfo.getPasswordEncoder(DataSourceInfo.java:207)

It appears that it can't find the PlainTextPasswordEncoder class,
which should be present. It is the default encoder. Is this class
somehow not in your JAR?

Thanks!

/dev/mrg

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posted	Nov 24, '08 at 2:48a
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