Creating JAR file

[arijit]

The online manual talks about an example called Interest file. They have said to use commands like "ant intro-interest-jar" to create the jar files. What happens if I develop my own EJB components? How do I create the jar file in that case?

[csanche7]

Just put your classes and META-INF directory (with ejb-jar.xml and jboss.xml) in a jar file whith the command:

jar cvf <jar-name>.jar classes META-INF

copy the jar file you have created to the deploy directory.

That´s all.

[arijit]

Thanks...

As I am a novice, please excuse me for these simple queries --

1. Jar file created by ANT has META-INF directory and ORG directory. It does not have CLASSES directory.

2. I have the Java files.. ANT helps in creating the CLASS files... Any other manual way to create the CLASS files?

[csanche7]

don´t worry

Ok, you have your .java, now compile them whith javac, perhaps you have problems with classpath, use the -classpath option.

javac -classpath <your-classpath-here> <your-classes>.java

Now you have the compiled classes. Create the META-INF directory and the ejb-jar.xml, jboss.xml files. Pack your .class and the META-INF directory whith jar.

jar cvf <jar-name>.jar <your classes>.class META-INF

For example you have these directories:

test/testEJB.class
test/testHome.class
test/testRemote.class
test/META-INF/ejb-jar.xml
test/META-INF/jboss.xml

from test you should execute

jar cvf test.jar *.class META-INF


Charly

[arijit]

Thanks a lot Charly....

I am trying to execute the Interest example (having 3 java files -- Interest.java, InterestBean.java, InterestHome.java) manually without the help of ANT (Is that advisable?)

When I am compiling the first file i.e. Interest.java I am getting the following errors. Similar errors for other files too. However, I can easily compile any other ordinary JAVA files having main() function.

Errors --

C:\Jboss\JBoss-2.4.4\examples\org\jboss\docs\interest>javac Interest.java
Interest.java:3: package javax.ejb does not exist
import javax.ejb.EJBObject;
^
Interest.java:11: cannot resolve symbol
symbol : class EJBObject
location: interface org.jboss.docs.interest.Interest
public interface Interest extends EJBObject
^
2 errors



What am I doing wrong ?

[csanche7]

It´s a classpath problem. Just add the jboss-j2ee.jar file (it´s in jboss/lib/ext) to your classpath and everything should work fine.

Charly

[arijit]

Thanks Charly... Yes its working now....

BUT :(

When I tried to compile InterestHome.java, it gave the following error --


C:\Jboss\JBoss-2.4.4\examples\org\jboss\docs\interest>javac InterestHome.java
InterestHome.java:17: cannot resolve symbol
symbol : class Interest
location: interface org.jboss.docs.interest.InterestHome
Interest create() throws RemoteException, CreateException;
^
1 error



The file Interest.class exists in the same directory where I am compiling this InterestHome.java file


Please advise

[csanche7]

It could be another classpath problem. Try compiling this way:

javac -classpath . InterestHome.java

with this you add the directory where you are to your classpath.

Charly

[arijit]

Didn't work Charly...

When I added the current directory in my classpath and gave the command "javac -classpath . InterestHome.java"

it showed 5 errors ----

InterestHome.java:5: package javax.ejb does not exist
import javax.ejb.CreateException;
^
InterestHome.java:6: package javax.ejb does not exist
import javax.ejb.EJBHome;
^
InterestHome.java:11: cannot resolve symbol
symbol : class EJBHome
location: interface org.jboss.docs.interest.InterestHome
public interface InterestHome extends EJBHome
^
InterestHome.java:17: cannot resolve symbol
symbol : class Interest
location: interface org.jboss.docs.interest.InterestHome
Interest create() throws RemoteException, CreateException;
^
InterestHome.java:17: cannot resolve symbol
symbol : class CreateException
location: interface org.jboss.docs.interest.InterestHome
Interest create() throws RemoteException, CreateException;
^
5 errors


If I however I gave the command, "javac InterestHome.java
" I am still receiving that 1 error ---

InterestHome.java:17: cannot resolve symbol
symbol : class Interest
location: interface org.jboss.docs.interest.InterestHome
Interest create() throws RemoteException, CreateException;
^
1 error



Can you help me ?

[csanche7]

It seems you have the jboss-j2ee.jar in your system classpath. Try adding the "." to it.

set classpath=%classpath%;. (Windows)

and then compile.

Charly

[arijit]

Hi Charly,

Thanks for your help. I commented the package statement in each of the 3 Interest files and then compiled. It compiled. All the 3 class files have now been generated.

The 3 class files and the META-INF directory are in the following directory -- "C:\Jboss\JBoss-2.4.4\examples\org\jboss\docs\interest"

I am presently in this directory itself and trying to execute ---
"jar cvf interest.jar *.class META-INF"

This helps in creating the jar file properly.

Now when I am trying to deploy this file, it is showing errors probably because the class files are supposed to be in a directory hierarchy like --- "org.jboss.docs.interest"

So I placed the class files in that directory hierarchy and executed the following command --
"jar cvf interest.jar org META-INF"

The jar file, thus created, should have been correct.

But even when I placed the class files in a directory hierarchy "org.jboss.docs.interest", deployment still gave errors.

This is probably because I compiled the java files after commenting out the package statements which had this path "org.jboss.docs.interest". So the class files created were not correct.

If I try to compile the java files with the package statement, then I am getting yesterday's errors.



So do I need to change some XML file to to make it work ? or the configuration file maybe ? Or maybe compile it from the top of the hierarchy level "org.jboss.docs.interest" ? Can you please help ?