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Calling a servlet from java program...

hi,
I'm using JRUN 3.0 as my app. server, I have class called DBManager which will handle transaction to database server. My servlet can work correctly with this class but when i call this class from my java program, it'won't work...

The error occured in my contructor which is look like below.

public DBManager(String disDsn) throws Exception {
dataSourceName = disDsn;
initialcontext = new InitialContext();
disDataSource = (DataSource)initialcontext.lookup ("java:comp/env/jdbc/" + disDsn);
}

when i init this class from my java program, i got this error message :
<<Need to specify class name in environment or system property, or as an applet parameter, or in an appication resource file: java.naming.factory.initial>>

please guide.. FYI, i'm new in java...:-)

thanks for your time..

pepenieto

When you create a new InitialContext from outside your application server, you must pass as parameter a hashtable with the parameters:
- Context.PROVIDER_URL (connection url to your app server)
- Context.SECURITY_PRINCIPAL (login to your app server)
- Context.SECURITY_CREDENTIALS (password to your app server)
- Context.INITIAL_CONTEXT_FACTORY (the class of your app server that implements the context factory)

pleasure

ASKER

hi pepenieto,
thanks for your response, as i said before..i'm new in java..can u explain more about your solution...:) or is there any link for me so that i can study about it...

thanks again..

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pepenieto

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pleasure

ASKER

hi pepenieto,
i'm trying out your solution.. let you know the outcome later... thanks anyway...

pleasure

ASKER

hi,
i try another approach to call servlet..
i found this code from other question posted here...
The code is as follow..
/*****************************/
ObjectInputStream is;
URL url;
HashMap hash = new HashMap();
try {
url = new URL("http://myserv/myApp/servlet/HelloServlet");
URLConnection urlConn = url.openConnection();
is = new ObjectInputStream(url.openStream());
hash = (HashMap) is.readObject();
System.out.println(hash);
} catch (Exception e) {
e.printStackTrace(System.err);
}
/*****************************/

but when i run this java program, i got error
<<
java.io.StreamCorruptedException: InputStream does not contain a serialized object
at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
at java.io.ObjectInputStream.<init>(Unknown Source)
at SDataExtraction.main(SDataExtraction.java:59)
>>

can anyone tell me why?? thanks