Hi,
I think the problem is that your ssock object is not assign, you only assign
it as null but in the try block
you try to use this object's accept method, but it is still null, thus the
"java.lang.NullPointerException" error
GSIServerSocket ssock = null;
...
...
try{
sock = (IaikGSISocket)ssock.accept();
HTH
Best Regards,
Lim Yong How
Software Engineer
Ryeson Security International
180B Bencoolen Street #10-01/02 The Bencoolen Singapore 189648
www.ryeson.com <http://www.ryeson.com>
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-----Original Message-----
From: A mailing list for discussion about Sun Microsystem's Java Servlet API
Technology. [mailto:[EMAIL PROTECTED]]On Behalf Of SUBSCRIBE
EJB-INTEREST J.H,Feng
Sent: Saturday, 28 December, 2002 10:14 AM
To: [EMAIL PROTECTED]
Subject: About Servlet as a Service.
Hi,
My needs is below:
I want to have a servlet ,which initiate a ServerSocket , then waiting
for client's connection. the client is
a Applet.I do is in my servlet.
////////////////////////////////////////////////////////////////
public void init() throws ServletException {
//class server i defined in another file.
server server1=new server(8888);
GSIServerSocket ssock = null;
IaikGSISocket sock;
GlobusProxy proxy = null;
InputStream in = null;
OutputStream out = null;
try{
sock = (IaikGSISocket)ssock.accept();
out = sock.getOutputStream();
in = sock.getInputStream();
proxy = sock.handleDelegation();
}catch(IOException e){
System.out.println("Error:accept!");
e.printStackTrace(System.err);
}
}
////////////////////////////////////////////////////////////////
I test my servlet,Errors,have you any idea to do this?thanks a lot.
java.lang.NullPointerException
at demoservlet.Servlet1.init(Servlet1.java:37)
at javax.servlet.GenericServlet.init(GenericServlet.java:258)
at
com.caucho.server.http.Application.createServlet(Application.java:3103)
at
com.caucho.server.http.Application.loadServlet(Application.java:3054)
at
com.caucho.server.http.QServletConfig.loadServlet(QServletConfig.java:418)
at
com.caucho.server.http.Application.getFilterChainServlet(Application.java:27
94)
at
com.caucho.server.http.Application.buildFilterChain(Application.java:2750)
at com.caucho.server.http.Invocation.service(Invocation.java:310)
at
com.caucho.server.http.CacheInvocation.service(CacheInvocation.java:135)
at
com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:244)
at
com.caucho.server.http.HttpRequest.handleConnection(HttpRequest.java:163)
at com.caucho.server.TcpConnection.run(TcpConnection.java:137)
at java.lang.Thread.run(Thread.java:536)
J.H,Feng
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