How to invoke a servlet from MDB

Hi,
Can someone please tell me how to invoke a servlet from MDB. Actually I want to have a MDB that will invoke a servlet that takes arround ~3 minutes to process and send the response back to MDB. Any small code snippet on invoking a servlet.
Thanks

nope. this is probably a bad design.
but here's a hint: whenever you have a question like this, start browsing the javadocs. chances are there's a class that might help you.
i'd recommend that you look at this:
http://java.sun.com/javase/6/docs/api/java/net/HttpURLConnection.html
%

Similar Messages

How to invoke a servlet from an application-URGENT

Hi,
          My requirement is as follows :
          I have to invoke a servlet from a client application. I am using
          java.net.URL and java.netURLConnection classes to
          open a connection and invoke the servlet.
          I am using WebLogic5.1
          my code snippet is as follows :
          URL url = new URL("http://localhost:7001/urlservlet");
          URLConnection connection = url.openConnection();
          connection.setRequestMethod("GET");
          connection.setDoOutput(true);
          connection.setDoInput(true);
          PrintStream outStream = new PrintStream( connection.getOutputStream() );
          outStream.print("message=hai");
          outStream.flush();
          outStream.close();
          When I execute the application, Webloigc server console is displaying the
          following line.
          <Listen Thread> Adding Address : <machine name><ip address>
          But the service method of servlet is not getting invoked at all.
          Help me to find the answer.
          Jeelani


jeelani <[email protected]> wrote:
          > Hi Dimitri,
          > Thanks a lot.That worked for me.
          > But if I want to send java objects (Vectors,beans),what is the best way to
          > do it.
          > This is exactly what our requirement is..
          If you want to send Java object you have to use POST:
          URLConnection conn = ...
          conn.setDoOutput(true); // makes this a POST
          OutputStream os = conn.getOutputStream();
          ...write your objects here...
          os.flush();
          os.close();
          InputStream in = conn.getInputStream(); // sends data to the server and
          // opens input stream
          ..read servlet response..
          .. ot just close the stream...
          in.close();
          > my client application need to send some java components to our main server
          > located in our head office.The servlet will read the objects and execute the
          > functionality..
          > I really appreciate for the fast response from you.
          > Dimitri Rakitine <[email protected]> wrote in message
          > news:[email protected]...
          >> Try it like this:
          >>
          >> URL url = new URL("http://localhost:7001/urlservlet?message=hai");
          >> URLConnection connection = url.openConnection();
          >> InputStream in = connection.getInputStream();
          >> in.close();
          >>
          >>
          >> jeelani <[email protected]> wrote:
          >> > Thanks for the quick response.
          >>
          >> > Actually right now it doesn't matter whether it is by GET or by POST.
          >> > Add my clinet application just needs to send data to Servlet and nothing
          > to
          >> > get in return.Thats why I am using connection.getOutputStream().
          >>
          >> > since application will not be reading anything from servlet, I don't
          >> > think it is required to use connection.getInputStream().
          >> > (I am sorry, if I am wrong).
          >>
          >> > Can you please help me out. weblogic server is able to get the address
          >> > from where the request is coming. Only problem is servlet is not getting
          >> > invoked.
          >>
          >> > regards,
          >> > Jeelani
          >>
          >>
          >> > Dimitri Rakitine <[email protected]> wrote in message
          >> > news:[email protected]...
          >> >> Are you trying to do get or post? First you set method to GET
          >> >> and then you do the POST.
          >> >>
          >> >> And add InputStream is = connection.getInputStream() - that will
          >> >> result in HttpURLConnection sending data to the server and getting
          >> >> back the response.
          >> >>
          >> >> jeelani <[email protected]> wrote:
          >> >> > Hi,
          >> >>
          >> >> > My requirement is as follows :
          >> >>
          >> >> > I have to invoke a servlet from a client application. I am using
          >> >> > java.net.URL and java.netURLConnection classes to
          >> >> > open a connection and invoke the servlet.
          >> >>
          >> >> > I am using WebLogic5.1
          >> >>
          >> >> > my code snippet is as follows :
          >> >>
          >> >> > URL url = new URL("http://localhost:7001/urlservlet");
          >> >>
          >> >> > URLConnection connection = url.openConnection();
          >> >>
          >> >> > connection.setRequestMethod("GET");
          >> >> > connection.setDoOutput(true);
          >>
          >> >> > PrintStream outStream = new
          >> > PrintStream( connection.getOutputStream() );
          >> >> > outStream.print("message=hai");
          >> >> > outStream.flush();
          >> >> > outStream.close();
          >> >>
          >> >> > When I execute the application, Webloigc server console is displaying
          >> > the
          >> >> > following line.
          >> >>
          >> >> > <Listen Thread> Adding Address : <machine name><ip address>
          >> >>
          >> >> > But the service method of servlet is not getting invoked at all.
          >> >>
          >> >> > Help me to find the answer.
          >> >>
          >> >> > Jeelani
          >> >>
          >> >> --
          >> >> Dimitri
          >> >> http://dima.dhs.org
          >>
          >>
          >>
          >> --
          >> Dimitri
          >> http://dima.dhs.org
          Dimitri
          http://dima.dhs.org

How to invoke a servlet from the command line

Hi,
I have a process that needs to do something remotely. One of the ideas is to have a servlet on the other side that can do that. So the question is how can I invoke it from my process?
Thanks,

First approximation to code:URL remoteTask = new URL("http://yourserver.org/yourservlet");
InputStream response = remoteTask.openStream();
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Different ways to invoke a servlet from another servlets?

Hello,
I am a bit confused today. I was thinking about all the ways by which I can invoke a servlet from another servlets. I know it can be done by creating an instance of the 2nd servlet in the 1st one. Is there any other way? such as say.... RequestDispatcher perhaps?
Here is an example to illustrate my point. I have a login.jsp which submits to login.do. login.do search through database and first authenticate email and then the corresponding password. Now its time for displayGame.do. So here how do i do? if it was a displayGame.jsp then i could have used Redirection or Forward but when it is servlets? Can I still go for Redirection or Forward??
Thank you for reading this confused post. :-)

if it was a displayGame.jsp then i could have used Redirection or Forward but when it is servlets?Question: do you know what a JSP becomes when you first run it?
Answer: a servlet.
So yes, you can use a RequestDispatcher to forward/redirect to a servlet OR a JSP, whatever you like.

How to invoke crystal reports from Oracle forms 11g R2 along with passing p

How to invoke crystal reports from Oracle forms 11g R2 along with passing parameter to it.
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Maybe crystal reports can be invoked via a URL call which would make it simple as you'd need simply build an URL and show the report using web.show_document. But that's pure speculation. Also you might not be the first with this requirement, so the solution to your problem might be right under your nose and just a little google search away ;)
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How to invoke java application from ABAP

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Manish

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regards
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Thanks.
Earlier I didn't get it because I was using doPost() method instead of doget().
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Pls Help !
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<head>
<script language="JavaScript">

</script>
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How to invoke the servlet

how to invoke a servlet using jsp
containing JSF components
how can we do this using creator ?
having sucessfully executed the examples
still dont know how to do it
and also jsp source is quite different than normal jsp
it doesnt allow jsp tags such as
<%= "asdf"%>any help is great to me
thanks in advance !
cheers,
shekar

and also jsp source is quite different than normal
jsp
it doesnt allow jsp tags such as
<%= "asdf"%>
This is jsp syntax -- JSC uses jsf...:-(
Regards,
- D.t.O

How to invoke BPEL process from JAVA API

Hi Guys
Any idea if you can tell me how to invoke BPEL process from JAVA API ?
What to do in BPEL process manager to achieve that?
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See http://download-west.oracle.com/docs/cd/B31017_01/integrate.1013/b28981/invoke.htm#sthref1373 and the JavaDocs http://download-west.oracle.com/docs/cd/B31017_01/integrate.1013/b28986/toc.htm.

How to invoke a Servlet method from application

please help me.the scenario is as follows
1)a servlet is placed on the server and application has invoked servlet with URL and URL Connection class
but how do i call a certain method of servlet on the server from the application.Let suppose the servlet's method to be invoked is print(String s).How it can be done from application.

As GrayMan suggested, Servlets are intended to be used for HTTP communication.
If you want to open common logic to multiple clients, use EJBs, CORBA or some type of Web Service (SOAP, XML-RPC).
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JDev 10.1.3 how to invoke oc4j_remote_deploy.jar from command line?

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If I try the same thing for 10.1.3, I get an error.
See below my command line and the output.
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Any help would be much appreciated.
Regards, Maarten Brugman
======================== command line: ==================
"C:\j2sdk1.4.2_09\bin\java.exe" -Djava.protocol.handler.pkgs=HTTPClient -jar C:\jdev-work\ebrp-new\ear\target\installer\oc4j_remote_deploy.jar http://lnvx0027:29805/Oc4jDcmServletAPI/ oc4jadmin ***** listApplications /oracle/oaedv03/oracle/oas/10.1.3/ontwj2e1013 UNDEFINED UNDEFINED OC4J_OEBRP
============ output: ====================================
Initializing log
Servlet interface for OC4J DCM commands
Command timeout defined at 600 seconds
Executing DCM command...
Executing command listApplications /oracle/oaedv03/oracle/oas/10.1.3/ontwj2e1013
UNDEFINED UNDEFINED OC4J_OEBRP
Command = LISTAPPLICATIONS
Opening connection to Oc4jDcmServlet
Setting userName to oc4jadmin
Sending command to DCM servlet
**** Could not check HTTP response code
** Thread[main,5,main] ** Fri May 11 17:18:13 CEST 2007 ** ** EXCEPTION: java.
net.SocketException: Unexpected end of file from server
java.net.SocketException: Unexpected end of file from server
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:822)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:711)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:820)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:711)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLCon
nection.java:635)
at java.net.HttpURLConnection.getResponseCode(HttpURLConnection.java:272
at oracle.j2ee.tools.remote_deploy.Oc4jDcmClient.isHttpResponseOk(Unknow
n Source)
at oracle.j2ee.tools.remote_deploy.Oc4jDcmClient.sendCommand(Unknown Sou
rce)
at oracle.j2ee.tools.remote_deploy.Oc4jDcmCommand.execute(Unknown Source
at oracle.j2ee.tools.remote_deploy.Oc4jDcmCommand.listApplications(Unkno
wn Source)
at oracle.j2ee.tools.remote_deploy.Oc4jDcmMain.main(Oc4jDcmMain.java:71)
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Closing connection to Oc4jDcmServlet
#### DCM command did not complete successfully (-1)
#### HTTP return code was -1
============ end output =================================

In my opinion, you will succeed in handling linefeeds in output texts by using an <tt><af:outputFormatted></tt> tag in conjuction with a JSF converter that replaces the linefeeds with a <tt><br></tt> tag in the text. You will have to implement a custom converter class (this is quite simple, see below) and to set it to the <tt>converter</tt> attribute of the <tt><af:outputFormatted></tt>. The converter class should look like:
public class MyLinefeedConverter implements javax.faces.convert.Converter
public MyLinefeedConverter() {
public Object getAsObject(FacesContext context, UIComponent component, String value) {
    return value;
public String getAsString(FacesContext context, UIComponent component, Object value) {
    if (value==null) return "";
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}In this way the linefeeds in your text values will be replaced by <tt><br></tt>, which will be rendered by the corresponding <af:outputFormatted> tag as line breaks.

How to invoke action method from mail contained link

Hello,
my application needs to send mails to users that include links for the user to click on. Something like www.mysite.com/displayData.jsp&id=123. My question is now how I make JSF invoke the respective method in the backed bean to display the data with the id 123 when the user clicks on the link int the mail.
I wonder whether there is some kind of "catch-all action" that checks whether the user is logged in and authorized whenever any JSP page is invoked. I'm a bit tired of first checking the authorization of some user before processing the remaining part od the backed bean's action method.
Thanks for any hints,
Oliver Plohmann

my application needs to send mails to users that
include links for the user to click on. Something
like www.mysite.com/displayData.jsp&id=123. My
question is now how I make JSF invoke the respective
method in the backed bean to display the data with
the id 123 when the user clicks on the link int the
mail.I dont think there is a way to submit to an action on click of a link. Only possible solution is to invoke the method from the constructor of your Backing Bean and populate the bean fields displayed on your page.
I wonder whether there is some kind of "catch-all
action" that checks whether the user is logged in and
authorized whenever any JSP page is invoked. I'm a
bit tired of first checking the authorization of some
user before processing the remaining part od the
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Invoking a servlet from an unix shell script

I have successfully created a servlet that when loaded via a browser takes input values in a form. After hitting "submit" the results are returned to the browser.
Now I would like to create an unix shell script that:
1. takes input values from the command line
2. invokes the servlet that does the necessary processing
3. returns the results (via echo, or in a text file, etc.)
Please give me any clues, hints, directions on
1. how to convert my existing servlet to accommodate a shell script
2. how to invoke the script within the shell script
Please refer me to any existing examples if available.
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George

Using the code below as an example I think you are saying I should take the following steps in a java sample program:
1. in a sample program create an Testservlet object -
Testservlet newservlet = new Testservlet();
2. to send input to the servlet execute -
newservlet.doGet( ? , ? );
I'm not sure what the parameters should look like
but I guess one of them is the input value.
3. to get output from the servlet execute -
String results = null;
results = newservlet.doPost( ? , ? );
Again, I'm not sure what the parameters
should look like.
public class TESTservlet extends HttpServlet
String connPool;
public void init(ServletConfig config)
throws ServletException
super.init(config);
connPool = getInitParameter("dataSource");
if (connPool == null) {
System.err.println("This servlet requires a " +
" dataSource initArg." );
public void doPost(HttpServletRequest req,
HttpServletResponse res)
throws ServletException, IOException
// first, set the "content type" header of the response
res.setContentType("text/html");
//Get the response's PrintWriter to return text to the client.
PrintWriter pw = res.getWriter();
pw.println("test");
String testinput = null;
try
testinput = req.getParameter("testinput");
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e.printStackTrace();
pw.println("testinput = " + testinput");
finally
pw.close();
public void doGet(HttpServletRequest req,
HttpServletResponse res)
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pw.println("Test Servlet");
putForm(req, pw);
pw.println("</body></html>");
pw.close();
* putForm() writes an HTML form to the response
public void putForm(HttpServletRequest req,
PrintWriter pw)
throws IOException
pw.println("<form action=\"" +
req.getRequestURI() +
"\" method=post>");
pw.println("<p><strong>Test Input: </strong>");
pw.println("<input type=\"text\" " +
"name=\"testinput\" value=\" \" size=12 maxlength=12>");
pw.println("<p><input type=\"submit\" " +
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pw.println("<p><input type=\"reset\" " +
" value=\"Clear Entries\" ");
pw.println("</form>");
} // END OF SERVLET

How to invoke a servlet from MDB

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