BeanInfo files in separate jar

Is it possible to divide the bean in two jar files: one with the class which represent the actual component and one with the files which describe the bean - BeanInfo etc.
If so how can I do that?

Is it possible to build the Bean and BeanInfo classes in one JAR file and the Custom Property Editor class in a different JAR- the JAR file with the Bean and BeanInfo classes has the JAR file with the Custom Property Editor class on the classpath, but during drag and drop of the JavaBean in an IDE, a class not found exception is thrown for the Custom Property Editor class. Are all classes for a given JavaBean required to be built into the same JAR file?

Similar Messages

Loading separate JAR files.

Hello.
I have an application that loads functionality from separate jar files so that the application has a "hot deploy" feature. This means that the application reloads a certain functionallity if a new jar is deployed to that folder. This also means that the jars containing this functionality must be in a separate forlder than the jars for the application framework, or the system would try to load this as a functionallity as well.
In my JNLP file, I load the whole application framework at startup, but none of the functionality jars as these are loaded after the application has logged the user in and so on. I use URLClassLoader to load the funtionality classes but in these classes, I import from the allready loaded framework, and the functionalities I try to load throw an excaption that they do not find the classes in the framework.
Any ideas as to how the externally loaded jars can find classes loaded into the framework? This works perfectly well when I don't use web start, so there must be some class loading issues I am not aware of.
Thank you.
-r

OK, I am making some progress, but now I have a different problem: Some of the framework for loading was written by someone else and I would really like access to the debug information it prints without having to rewrite a lot to print it all to files. Is there any way to get access to everything that is being printed on System.out from web start. Been looking around but I can't find anything on the subject.

Weblogic 12c JSF2 and EJB3.1 using CDI injection , in separate jar files

I am trying to inject a stateless EJB and managed Bean of JSF2 into a CDI managed controller.
That means using @inject replace @EJB of EJB and @Named of CDI replace @ManageBean in JSF2 , EJB3.1 and JSF2 in separate jar files.
At result,My test gets the following Exception in weblogic 12c。
If EJB in separate files and Managed Bean of JSF in WEB-INF/classes not separte file, then no problem.
weblogic.management.DeploymentException:
     at weblogic.application.internal.BaseDeployment.throwAppException(BaseDeployment.java:123)
     at weblogic.application.internal.BaseDeployment.prepare(BaseDeployment.java:239)
     at weblogic.application.internal.SingleModuleDeployment.prepare(SingleModuleDeployment.java:48)
     at weblogic.application.internal.DeploymentStateChecker.prepare(DeploymentStateChecker.java:158)
     at weblogic.deploy.internal.targetserver.AppContainerInvoker.prepare(AppContainerInvoker.java:60)
     at weblogic.deploy.internal.targetserver.operations.ActivateOperation.createAndPrepareContainer(ActivateOperation.java:207)
     at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doPrepare(ActivateOperation.java:96)
     at weblogic.deploy.internal.targetserver.operations.AbstractOperation.prepare(AbstractOperation.java:229)
     at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentPrepare(DeploymentManager.java:747)
     at weblogic.deploy.internal.targetserver.DeploymentManager.prepareDeploymentList(DeploymentManager.java:1216)
     at weblogic.deploy.internal.targetserver.DeploymentManager.handlePrepare(DeploymentManager.java:250)
     at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.prepare(DeploymentServiceDispatcher.java:159)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doPrepareCallback(DeploymentReceiverCallbackDeliverer.java:171)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$000(DeploymentReceiverCallbackDeliverer.java:13)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$1.run(DeploymentReceiverCallbackDeliverer.java:46)
     at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:545)
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)
Caused By: org.jboss.weld.exceptions.DeploymentException: WELD-001408 Unsatisfied dependencies for type [ISaleInfoService] with qualifiers [@Default] at injection point [[field] @Inject private com.hylandtec.hystone.showcase.web.SaleInfoBean.saleInfoService]
     at org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:258)
     at org.jboss.weld.bootstrap.Validator.validateBean(Validator.java:105)
     at org.jboss.weld.bootstrap.Validator.validateRIBean(Validator.java:125)
     at org.jboss.weld.bootstrap.Validator.validateBeans(Validator.java:324)
     at org.jboss.weld.bootstrap.Validator.validateDeployment(Validator.java:309)
     at org.jboss.weld.bootstrap.WeldBootstrap.validateBeans(WeldBootstrap.java:361)
     at com.oracle.injection.provider.weld.WeldInjectionContainer.start(WeldInjectionContainer.java:105)
     at com.oracle.injection.integration.CDIAppDeploymentExtension.prepare(CDIAppDeploymentExtension.java:60)
     at weblogic.application.internal.flow.AppDeploymentExtensionFlow.prepare(AppDeploymentExtensionFlow.java:23)
     at weblogic.application.internal.BaseDeployment$1.next(BaseDeployment.java:706)
     at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:35)
     at weblogic.application.internal.BaseDeployment.prepare(BaseDeployment.java:237)
     at weblogic.application.internal.SingleModuleDeployment.prepare(SingleModuleDeployment.java:48)
     at weblogic.application.internal.DeploymentStateChecker.prepare(DeploymentStateChecker.java:158)
     at weblogic.deploy.internal.targetserver.AppContainerInvoker.prepare(AppContainerInvoker.java:60)
     at weblogic.deploy.internal.targetserver.operations.ActivateOperation.createAndPrepareContainer(ActivateOperation.java:207)
     at weblogic.deploy.internal.targetserver.operations.ActivateOperation.doPrepare(ActivateOperation.java:96)
     at weblogic.deploy.internal.targetserver.operations.AbstractOperation.prepare(AbstractOperation.java:229)
     at weblogic.deploy.internal.targetserver.DeploymentManager.handleDeploymentPrepare(DeploymentManager.java:747)
     at weblogic.deploy.internal.targetserver.DeploymentManager.prepareDeploymentList(DeploymentManager.java:1216)
     at weblogic.deploy.internal.targetserver.DeploymentManager.handlePrepare(DeploymentManager.java:250)
     at weblogic.deploy.internal.targetserver.DeploymentServiceDispatcher.prepare(DeploymentServiceDispatcher.java:159)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.doPrepareCallback(DeploymentReceiverCallbackDeliverer.java:171)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer.access$000(DeploymentReceiverCallbackDeliverer.java:13)
     at weblogic.deploy.service.internal.targetserver.DeploymentReceiverCallbackDeliverer$1.run(DeploymentReceiverCallbackDeliverer.java:46)
     at weblogic.work.SelfTuningWorkManagerImpl$WorkAdapterImpl.run(SelfTuningWorkManagerImpl.java:545)
     at weblogic.work.ExecuteThread.execute(ExecuteThread.java:256)
     at weblogic.work.ExecuteThread.run(ExecuteThread.java:221)
Edited by: user8823518 on 2012-3-12 上午12:49

This is a Weblogic 12.1.1 bug (a patch is available), explained here:
http://docs.oracle.com/cd/E24329_01/doc.1211/e26593/issues.htm#BCFGBBBE
extract:
If a WAR file has two embedded bean deployment archive JARs (that is, JARs that contain META-INF/beans.xml), an UnsatisfiedDependencyException occurs if a class in one JAR contains an @Inject that is of a type that is defined in the other JAR.
Workaround
+Download and install patch 13563205. Enter this value in the Patch Number Search field on the Patches & Updates tab of My Oracle Support.+

How to deploy 2 EJB's in separate jars

Hi,
I have successfully deployed 2 session ejb's in the same jar file, i.e. with one ejb-jar.xml and one weblog-ejb-jar.xml. And get get the ejb's to communicate with each other.
Now I want to be able to compile and deploy the 2 ejb's in separate jar files as part of an ear file.
My method so far is this:
I have split the ejb-jar.xml file into two, for each ejb, and also the weblogic-ejb-jar.xml file into two for each ejb.
I then compiled the ejb source files and packaged each ejb up with its respective deployment descriptors into two separate .jar files.
I then want to run weblogics ejbc on each .jar file in turn so that the resultant .jar files (with newly created stubs/skels) can be packaged into an .ear to be easily deployed into weblogic.
I try and run the ejbc command on the first of the .jar files and i get the error:
ERROR: Error from ejbc:
In ejb-jar.xml, the EJB 'SessClient' contains an invalid ejb-link in ejb
-ref 'ejb/SessLogHome'. No EJB with ejb-name 'IntellectStateless.jar#SessLog' co
uld be found.
ERROR: ejbc found errors
My ejb-jar.xml file for this ejb is:
<ejb-jar>
<enterprise-beans>
    <session>
      <ejb-name>SessClient</ejb-name>
      <home>intellectsession.sessiontwo.SessClientEntHome</home>
      <remote>intellectsession.sessiontwo.SessClientEnt</remote>
      <ejb-class>intellectsession.sessiontwo.SessClientEntBean</ejb-class>
      <session-type>Stateless</session-type>
      <transaction-type>Container</transaction-type>
      <ejb-ref>
        <ejb-ref-name>ejb/SessLogHome</ejb-ref-name>
        <ejb-ref-type>Session</ejb-ref-type>
        <home>intellectsession.stateless.SessLogHome</home>
        <remote>intellectsession.stateless.SessLog</remote>
        <ejb-link>IntellectStateless.jar#SessLog</ejb-link>
      </ejb-ref>
    </session>
</enterprise-beans>
<assembly-descriptor>
    <container-transaction>
      <method>
     <ejb-name>SessClient</ejb-name>
     <method-name>*</method-name>
      </method>
      <trans-attribute>Required</trans-attribute>
    </container-transaction>
</assembly-descriptor>
</ejb-jar>and both of my .jar files are in the same directory when I run the ejbc command.
I'm sure this can be done but I just think i'm not doing it in the right order maybe??
Anyway pointers will be gr8ly appreciated.
Cheers
T

Okay here is the solution to how to achieve the problem I encountered above:
I am compiling my ejb.jar files using the weblogic.ejbc compiler, obviously I am deploying on weblogic here.
This section:
<ejb-ref>
<ejb-ref-name>ejb/SessLogHome</ejb-ref-name>
<ejb-ref-type>Session</ejb-ref-type>
<home>intellectsession.stateless.SessLogHome</home>
<remote>intellectsession.stateless.SessLog</remote>
<ejb-link>IntellectStateless.jar#SessLog</ejb-link>
</ejb-ref>must have JUST the <ejb-link/> tag removed from the ejb-jar.xml file. And then the weblogic-ejb-jar.xml file MUST look like this:
<weblogic-ejb-jar>
    <weblogic-enterprise-bean>
        <ejb-name>SessClient</ejb-name>
        <reference-descriptor>
          <ejb-reference-description>
            <ejb-ref-name>ejb/SessLogHome</ejb-ref-name>
            <jndi-name>SessLog</jndi-name>
          </ejb-reference-description>
        </reference-descriptor>
        <jndi-name>SessClient</jndi-name>
    </weblogic-enterprise-bean>
</weblogic-ejb-jar>Note the <refererence-descriptor> tag as the important part.
After these changes, the 2 ejb.jar files can be compiled using the weblogic.ejbc tool, thus supplying the stubs/skels, and then the resultant two ejb.jar files can be added to the EAR file and deployed to weblogic.
Result: 2 ejb's in separate jars, in one EAR file, talking to each other.
T

Packages in separate Jars causes classpath error

For the purposes of easy-updating and allowing developers to work on one part of a system without interfering with others, I have created separate Jar files for the main packages in my application. So;
com.me.pack1 is in Pack1.jar
com.me.pack2 is in Pack2.jar
An ant build takes care of building and packaging these up. The Jar files have the correct directory structure i.e.;
jar $ $JAVA_HOME/bin/jar tf /users/jmcparla/jar/Pack1.jar
META-INF/
META-INF/MANIFEST.MF
com/
com/me/
com/me/pack1/
com/me/pack1/MainClass.class
jar $ $JAVA_HOME/bin/jar tf /users/jmcparla/jar/Pack2.jar
META-INF/
META-INF/MANIFEST.MF
com/
com/me/
com/me/pack2/
com/me/pack2/OtherClass.classHowever when I run it;
jar $ $JAVA_HOME/bin/java -cp /users/jmcparla/jar/Pack2.jar -jar /users/jmcparla/jar/Pack1.jar
Entered main
Created MainClass instance
Exception in thread "main" java.lang.NoClassDefFoundError: com/me/pack2/OtherClass
        at com.me.pack1.MainClass.main(MainClass.java:13)The classes are;
MainClass.java
package com.me.pack1;
import com.me.pack2.OtherClass;
public class MainClass
    public static void main(String[] args)
        System.out.println("Entered main");
        new MainClass();
        System.out.println("Created MainClass instance");
        new OtherClass();
        System.out.println("Created OtherClass instance");
}OtherClass.java
package com.me.pack2;
public class OtherClass
}and the build file is;
build.xml
<project name="JarProblem" default="buildJars" basedir=".">
<property name="classdir" value="classes"/>
<target name="compile" depends="clean" description="compile the code">
      <mkdir dir="${classdir}"/>
      <javac debug="on" debuglevel="vars,lines,source" srcdir="."
             destdir="${classdir}" encoding="ISO-8859-1">
      </javac>
</target>
<target name="buildJars" depends="compile" description="build the jar files">
    <antcall target="buildPack2"/>
    <antcall target="buildPack1"/>
</target>
<target name="buildPack2" description="build the Pack2 jar">
    <tstamp>
      <format property="time" pattern="hh:mm aa dd/MM/yyyy"/>
    </tstamp>
    <jar destfile="Pack2.jar" update="false">
      <fileset dir="${classdir}">
        
        <include name="com/me/pack2/*"/>
      </fileset>
      <manifest>
        <attribute name="Built" value="${time}"/>
      </manifest>
    </jar>
</target>
   <target name="buildPack1" description="build the Pack1 jar">
    <tstamp>
      <format property="time" pattern="hh:mm aa dd/MM/yyyy"/>
    </tstamp>
    <jar destfile="Pack1.jar" update="false">
      <fileset dir="${classdir}">
        
        <include name="com/me/pack1/*"/>
      </fileset>
      <manifest>
        <attribute name="Main-Class" value="com.me.pack1.MainClass"/>
        <attribute name="Built" value="${time}"/>
      </manifest>
    </jar>
</target>
<target name="clean" description="clean up the compiled source files">
    <delete verbose="false" failonerror="false">
      <fileset dir="${classdir}"/>
    </delete>
</target>
</project>The build completes with no problems. So why can't the java command see OtherClass?

johnmcparlald wrote:
However when I run it;
jar $ $JAVA_HOME/bin/java -cp /users/jmcparla/jar/Pack2.jar -jar /users/jmcparla/jar/Pack1.jar
Entered main
Created MainClass instance
Exception in thread "main" java.lang.NoClassDefFoundError: com/me/pack2/OtherClass
at com.me.pack1.MainClass.main(MainClass.java:13)
I can't help you with ant but I can tell you that the command you entered looks wrong. If you use the -jar option with the java command, the only classpath that is used is the one specified by the Class-Path entry in the manifest - other classpaths are ignored.
So you either need to leave off the -jar, include the Pack1.jar file and specify the main class, or include the Class-Path: Pack2.jar entry in the manifest. (At least, it looks to me like there is no Class-Path in the manifest.)

Problem deploying related EJBs in separate JARs

I have 2 entity EJBs, User and Address, in separate JAR files. The User bean
has business methods to get and set its related address as follows:
void setAddressPK(AddressPK newAddress) throws java.rmi.RemoteException;
AddressPK getAddressPK() java.rmi.RemoteException;
When I try and load User.jar in the EJB Deployment tool it complains that it
can't find the AddressPK class. However, I can get round this by explicitly
adding Address.jar to the classpath.
When I actually deploy and use the User bean I do NOT need Address.jar on
the classpath, although I do get warnings during deployment.
So my question is how do I package and deploy related EJBs. I don't want to
have to have all my EJBs in the same JAR, nor do I want to have the same
classes in more than one JAR. Is what I'm doing correct - am I supposed to
have Address.jar on the classpath? And what about an utility classes that
are shared between EJBs - where do I put those?
Thanks in advance,
Steve.

I resolved the problem be making sure that my deployment
jars don't appear in my servlet classpath....
Jason
Jeff Wang <[email protected]> wrote in message news:[email protected]...
In general, if two beans are related (i.e. you can not compile one
without the other being on the classpath) and they are both deployed
they should be in the same jar file. If you do not deploy one of them,
then the undeployed bean can be in the weblogic.class.path with no
problem.
I suspect that you are getting a ClassCastException because you have the
deployment jars in your weblogic.class.path (or java classpath.) Remove
them, and see if the error is resolved.
Jeff Wang
WLCS 2.0 Software Engineer
Jason Rosenberg wrote:
Does the same apply for beans of different types? In other words, do
I need to have an entity bean and a session bean which wraps the entity
bean in the same jar file?
I am having a problem accessing a session bean from a JSP servlet. I get
the dreaded ClassCastException. I don't get this problem, however, if
I access the session bean directly from a stand-alone java client. It's
only when I access the session bean via JSP....
Any ideas?
Jason
Jeff Wang <[email protected]> wrote in message news:[email protected]...
What you should have in the .jar files are:
the home (say it is called <bean>home.class)
the remote (say it is called <bean>.class)
the impl (say it is called <bean>impl.class)
These are the only ones that should be in the .jar file. (not even the
PK should be there, for an entity bean.) All the support classes should
be in weblogic.class.path If you have cross jar dependencies,
unfortunately, you will have to specify the jar in the
weblogic.class.path... However, this is not a good idea, as you will
have 2 class files in memory. At the very least, you will not be able
to do hot deploy. Depending on your code, you'll have a "class cast
exception <bean> can not be casted to an object of <bean>" (Something
like that, I don't have the exact error in front of me.) In your
example it is probably better to put User and Address in the same jar.
Jeff Wang
WLCS 2.0 Software Engineer
Steve Ward wrote:
I have 2 entity EJBs, User and Address, in separate JAR files. The User bean
has business methods to get and set its related address as follows:
void setAddressPK(AddressPK newAddress) throws java.rmi.RemoteException;
AddressPK getAddressPK() java.rmi.RemoteException;
When I try and load User.jar in the EJB Deployment tool it complains that it
can't find the AddressPK class. However, I can get round this by explicitly
adding Address.jar to the classpath.
When I actually deploy and use the User bean I do NOT need Address.jar on
the classpath, although I do get warnings during deployment.
So my question is how do I package and deploy related EJBs. I don't want to
have to have all my EJBs in the same JAR, nor do I want to have the same
classes in more than one JAR. Is what I'm doing correct - am I supposed to
have Address.jar on the classpath? And what about an utility classes that
are shared between EJBs - where do I put those?
Thanks in advance,
Steve.

NoClassDefFoundError extending class in separate JAR

I have a class Foo which gets called from my servlet (extends HttpServlet) class. Both Foo and the servlet class are located in WEB-INF/classes and are deployed as part of the war file. Class Foo extends class Bar, which is a different .jar file located in the /WEB-INF/lib directory of the webapp. When I attempt to create an instance of Foo, I get the following exception:
java.lang.NoClassDefFoundError: /general/client/common/beans/Bar
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1267)
     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1198)
     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
     at server.DBServlet.createFoo(DBServlet.java:236)
     at server.DBServlet.processInput(DBServlet.java:333)
     at server.DBServlet.doGet(DBServlet.java:154)
     at server.DBServlet.doPost(DBServlet.java:205)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
     at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:419)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
     at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)
     at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
     at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
     at java.lang.Thread.run(Thread.java:595)
I'm running this on Windows, and found if I added the classpath the the jar file where the Bar class is located, that it worked fine. But my expectation is that the jar file should have been found because it is in the /WEB-INF/lib dir. There is a line the Tomcat docs that says:
"Last, any JAR containing servlet API classes will be ignored by the classloader. All other class loaders in Tomcat 5 follow the usual delegation pattern."
So maybe I need to do something special to load the Bar class, or there's something strange about the way the classes and jars are being loaded that I don't fully understand. I was able to instantiate the Bar class directly from w/in my servlet class, I just can't create an instance of the Foo class that is in /WEB-INF/classes along with the servlet class. So I'm not convinced that the Bar class or associated jar file isn't being loaded.
I don't want to have to set the classpath explicitly, so I'm looking for advice on why I'm getting this exception and how best to dynamically load the classes I need.
Thanks.
ab.

Thanks for hanging in there so far. Here's the specifics if you want to try to re-create this.
I have a webapp, which contains the class DBServlet:
package com.hm.dhca.server;
public class DBServlet extends HttpServlet
// Stuff
     public void processInput()
          Foo foo = new Foo();
The webapp also contains the class Foo:
package com.hm.dhca.common;
import com.general.client.common.beans.Bar;
public class Foo extends Bar
     public Foo()
          super();
          System.out.println("Foo");
Both of the classes are located in webapps\DHCA\WEB-INF\classes...
The Bar class is in a separate jar called HMJCommon.jar in the webapps\DHCA\WEB-INF\lib dir.
Class Bar looks like this:
package com.general.client.common.beans;
public class Bar
     public Bar()
          System.out.println("Bar");
DBServlet creates an instance of Foo as:
Foo foo = new Foo();
Which throws the Exception:
java.lang.NoClassDefFoundError: com/general/client/common/beans/Bar
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1267)
     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1198)
     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
     at com.hm.dhca.server.DBServlet.processInput(DBServlet.java:236)
     at com.hm.dhca.server.DBServlet.doGet(DBServlet.java:154)
     at com.hm.dhca.server.DBServlet.doPost(DBServlet.java:205)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
     at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:541)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
     at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:419)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
     at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
     at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
     at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:667)
     at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
     at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
     at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
     at java.lang.Thread.run(Thread.java:595)
Clues:
1. All three classes exist in the locations specified above - I have checked this manually.
2. Within DBServlet, I can create an instance of Bar. But I cannot create an instance of Foo without the exception.
3. If I move the Foo class from package com.hm.dhca.common to package com.hm.dhca.server (same package as DBSerlvet), everything works fine.
4. If I modify Tomcat's classpath to include the HMJCommon.jar, it works fine (as previously discussed).
Theory:
I have a vague theory that what is happening is that two different webappclassloaders are loading the Foo and Bar classes, for whatever reason. As a result, they can't see each other, because neither is up the hierarchy tree from the other.
This does not explain how I can instantiate Bar from DBServlet, but not Foo.
Hope this helps. I think I've corrected previous mistake w/ removing too much from package naming. I'm resorting to the workaround in clue #3 for the moment. But it's not the correct solution, and it's showing that I don't really understand what's going on here.

How to read, write file inside the JAR file?

Hi all,
I want to read the file inside the jar file, use following method:
File file = new File("filename");
It works if not in JAR file, but it doesn't work if it's in a JAR file.
I found someone had the same problem, but no reply.
http://forum.java.sun.com/thread.jsp?forum=22&thread=180618
Can you help me ? I have tried this for all night !
Thanks in advance
Leo

If you want to read a file from the JAR file that the
application is packaged in (rather than a separate
external JAR file) you do it like this ...
InputStream is =
ClassLoader.getSystemResourceAsStream("filename");Better to use
this.getClass().getClassLoader().getResourceAsStream();
From a class near to where the data is. This deals with multiple classloaders properly.

Local references and EJBs in separate jars

Hi
I have trouble in getting local references when the EJBs are built in separate jar files. I am using the <ejb-link> in the <local-ejb-ref>. But I could not get reference to the EJB's local reference.
Please let me know if there is any documentation that tells about getting local references and having the EJBs in separate jar files.
Thanks

Greetings,
Hi
I have trouble in getting local references when the
EJBs are built in separate jar files. I am using theThere are a number of reasons why this may be happening and without more specific information it is difficult to say which you are encountering... In any case, the fact that your beans are in separate jars is not, by itself, the issue. It is worth noting, however, that Local references may only be used when both components (referencer and referencee) are co-located within the same VM instance and perhaps this little fact may shed some light on your problem??
<ejb-link> in the <local-ejb-ref>. But I could not get<ejb-link> should point to the actual JNDI binding name, sans root nomenclature (java:comp/env/), but with full sub-context (ejb/myapp/.../MyLocalBean), of the referenced bean.
reference to the EJB's local reference.Perhaps it goes without saying (but just to be sure :)... of course, your referenced bean must actually have Local interfaces associated with it.
Please let me know if there is any documentation
that tells about getting local references and having
the EJBs in separate jar files.Both the J2EE tutorial and the EJB 2.0 spec. have the relevant information. :) However, I've already listed the requirements above: supplied local interfaces, co-located components, and correct link reference.
I hope this helps.
ThanksRegards,
Tony "Vee Schade" Cook

Creating BeanInfo files in JDev3

Hi
I have been trying to create BeanInfo files with JDev3 but am having a problem. I select which properties and methods I want to be exposed and it creates the discriptors for them. However onlt the last descriptor in created in each of the two areas are then listed in their respective arrays. Is there away to set it to fill in the two arrays properly.
Thanks
Matthew

Is it possible to build the Bean and BeanInfo classes in one JAR file and the Custom Property Editor class in a different JAR- the JAR file with the Bean and BeanInfo classes has the JAR file with the Custom Property Editor class on the classpath, but during drag and drop of the JavaBean in an IDE, a class not found exception is thrown for the Custom Property Editor class. Are all classes for a given JavaBean required to be built into the same JAR file?

Want to package a class file and a jar file in main jar file

hello folks,
i have a class named launch.class
and a jar file named First_Sample2.jar
First_Sample2 is an application that i have made which requires more memory than is generally allocated by the JRE. so, launch.java file just contains code to execute the command:
javaw -Xms128M -Xmx256M -jar " + path + "First_Sample2.jar"
where path variable refers to a directory which contains First_Sample2.jar
problem is that the only way i can use this code is by keeping two separate JAR files, one is launch.jar, the other is First_Sample2.jar and then execute launch.jar, which will in turn call First_Sample2.jar (which means I have to provide anyone with 2 separate files if they want to use my application)
is there any way in which i can combine both these jar files into one?

Well there is a couple ways you can achieve this, but I am telling you that packaging a JAR within a JAR will not work because classes within the internal JAR will not be recognized on the classpath.
The easiest way to get the user to run your program with a simple double click would be to hide the two JAR files from them completely, having them reside in a folder somewhere on the user's computer. I would use a batch file (Windows environment) or an .sh file (Unix) that would set up your classpath variable and then call java to execute the main class in your main JAR.
For instance:
cd [Where java.exe resides]
set CLASSPATH=[semi-colon delimited absolute file paths pointing to your two JAR files and any other JAR files that they reference]
java -cp %CLASSPATH% [main class]
The user would have access to this batch file, perhaps on their desktop, where they can double click to execute teh program just as if it were an EXE file. This is the best way because it hides the JAR files from the user.
If you would like to combine the two JAR files however, you would need to extract the contents of the secondary JAR file and then include them in with the contents of the main JAR file. That is the only other way that all classes are visible on the classpath.

Can Netbeans put a jar file In a jar file?

I just went through the process of getting Eclipse to create a jar file that would execute from a command prompt using a plugin called fatjar :
http://fjep.sourceforge.net/
Details from other thread :http://forum.java.sun.com/thread.jspa?threadID=5219638&tstart=0
I really would like to use netbeans but i now have the exact same problem trying to make a jar file in netbeans 5.5.1
I am using a package from icaste.com It has a
.dll file to put in the windows directory
JCommSerial_3_0.jar file that contains all the classes
I can compile and run a file in the IDE and it works fine
The Jar file does not contain the classes so i get errors when running from command line.
Here is the layout of my screen and result of run command in IDE
http://www.acousticlights.com/netbeans.png
What do I need to try?

georgemc wrote:
Why is everyone so obsessed with doing this? The gains are minimal and the problems numerousBecause we are new and don't understand how the java VM actually runs code and the error messages sent by the java machine are cryptic.
My first attempt at using an external jar in a java program lead me to believe that all of the code for a java program would be in a jar file including external jar files, after all the JDK standard library has tons of jars in it so I assumed the external jar file would be linked (as most other programming compiler/linkers I have worked with in my top down programming life).
I find out the answer is so simple that the external jar file could not be found by the VM running my jar file. Like I said, if the VM would have just gave me an error that it could not find a file on a specific directory i never would have perused the idea of jar in a jar (fatjar plugin for Eclipse for example)
Really this is like getting into a race car and not knowing at what RPM to shift gears, sure you can press the pedal and make it go but if you don't understand how it works under the hood you are going to blow the engine if you keep it in first gear.
I have read many posts on these errors, the reason is the error message is just not very descriptive of the original problem. If I try and open a database called xyz.dbf that has one field defined as lastname, in C for example, I would not give the error message "Lastname could not be found) when indeed the lastname could not be found but the reason it could not be found was because the database xyz.dbf could not be found. Further , adding to the error message that the system is looking for xyz.dbf on drive X- subdirectory -mydatabases would complete the error message and allow the user to fix the error. Just what is a non java programmer that is using my java program suppose to do with an Ecception Error in (main) bla bla bla... I know now I need to check for library files myself within my own java programs and give a better error message to the user before the java VM sends out it's cryptic message.
Edited by: metron9 on Sep 25, 2007 11:00 AM

How do I read a text file in a Jar Executable?

Hello All,
I have a need to package a text file into a Jar Exectable file and then have my java code read that text file in using a BufferedReader. Can anyone out there tell me how to do this? My first question is how do I reference this file by the path name? O, I'm also using Windows.
Thanks for your help.
Karl

I have the same problem with kportner . I did by joop_eggen but I got the error at:
BufferedReader in = new InputStreamReader(is);Can't conver from BufferedReader to InputStreamReader
When I up my applet to server and get it from client. My applet couldn't read the text file.
Any one help me!
Thanks.

How can I access my java class file in a .jar file ...PLz Help anyone!!

Hi Folks,
I am new in Java programming, have a .jar file that contains .java files that I want no access and use from another .java file. These files in the .jar file basically form a library thus have no main-method. However I can not declare an instance of the library (in the .jar file) and use it within my program.
Plz help ...I have tried all I know in vain.
Thanks.

temba wrote:
Hi Folks,
I am new in Java programming, have a .jar file that contains .java files that I want no access and use from another .java file. These files in the .jar file basically form a library thus have no main-method. However I can not declare an instance of the library (in the .jar file) and use it within my program. You are making little sense. You can't instantiate .java files.
Plz help ...I have tried all I know in vain.
Thanks.Could you post WHAT you have tried and also post what error messages you received?

How can I open PDF files in separate window??? My PDF files are openning in the same window

How Can I open multiple Pdf files in separate windows?
they are all opening in the same window.
And I cant find where I can email Adobe support...Really??? no contact support???? that sucks.

not really. it was opening in seprate windows and then it just change.
can you please find out and let me know how to make it open in seprate windows like it use to before.

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