User a commonj WorkManager on a servlet
Hi,
I'm developing a servlet in weblogic 9 and want to assing a commonj WorkManager to it for work handling. For that purpose I have defined the following resource-ref on web.xml file
<resource-ref>
<res-ref-name>wm/MyWorkManager</res-ref-name>
<res-type>commonj.work.WorkManager</res-type>
<res-auth>Container</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>
On the code I obtain successfully the reference of that WorkManager through JNDI. The problem is that when I try to schedule the first work on that work manager i get and exception saying the work manager is shutdown.
commonj.work.WorkException: commonj.work.WorkRejectedException: [WorkManager:002916]Request belonging to WorkManager wm/MyWorkManager, application nsu-ws-connector is rejected as the WorkManager is shutdown
at weblogic.work.j2ee.J2EEWorkManager$WorkStatus.setThrowable(J2EEWorkManager.java:326) [weblogic.jar:9.2.3.0]
at weblogic.work.j2ee.J2EEWorkManager$WorkWithListener$1.run(J2EEWorkManager.java:229) [weblogic.jar:9.2.3.0]
at weblogic.work.ServerWorkManagerImpl$WorkAdapterImpl.run(ServerWorkManagerImpl.java:518) [weblogic.jar:9.2.3.0]
at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209) [weblogic.jar:9.2.3.0]
at weblogic.work.ExecuteThread.run(ExecuteThread.java:181) [weblogic.jar:9.2.3.0]
Caused by: commonj.work.WorkRejectedException: [WorkManager:002916]Request belonging to WorkManager wm/MyWorkManager, application nsu-ws-connector is rejected as the WorkManager is shutdown
... 4 common frames omitted
Do I have to startup this work manager or something? Thanks a lot
Hi,
Which kind of workmanager is it..."*Application Level WorkManagers*" or "*Global WorkManagers*". Have u provided any <work-manager> tag in "weblogic.xml" as well?
Please refer to the following link...and let us know if you are doing anything special... After the Lookup to the WorkManager is Successful... How r u calling the .schedue()? or what exactly r u doing after that?
http://jaysensharma.wordpress.com/workmanagers/
And
http://jaysensharma.wordpress.com/2009/12/20/application-level-workmanager-timermanager-lookup/
Thanks
Jay SenSharma
Similar Messages
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[WebLogic Server 11g 10.3.3] Cannot Lookup CommonJ WorkManager ?
Hi,
I am currently working on an application and going to use the Weblogic's CommonJ WorkManager; I tried the example in http://download.oracle.com/docs/cd/E14571_01/web.1111/e13733/toc.htm ; however I got an error
javax.naming.ServiceUnavailableException [Root exception is java.net.UnknownHostException: Unknown protocol: 'RMI']
Have anyone experienced this? I searched the web for answers but it seems I'm the only one getting this exception.
The declaration of the work manager is in web.xml as follows:
<resource-ref>
<res-ref-name>default</res-ref-name>
<res-type>commonj.work.WorkManager</res-type>
<res-auth>Container</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>
and I tried to lookup using the following code (basically just copy-paste from the example with some modification):
void init() {
try {
System.out.println("## executing in: " +
((ExecuteThread)Thread.currentThread()).getWorkManager()
.getName());
String lookupstr = "java:comp/env/default";
System.out.println("## lookup >>> " + lookupstr);
InitialContext ic = new InitialContext();
WorkManager wm = (WorkManager)ic.lookup(lookupstr);
System.out.println("## got Java EE work manager !!!!");
wm.schedule(new Work(){
public void run() {
ExecuteThread th = (ExecuteThread) Thread.currentThread();
System.out.println("## [servlet] self-tuning workmanager: " +
th.getWorkManager().getName());
public void release() {}
public boolean isDaemon() {return false;}
catch (NamingException ne) {
ne.printStackTrace();}
catch (WorkException e) {
e.printStackTrace();
and the error is:
## executing in: default
## lookup >>> java:comp/env/default
javax.naming.ServiceUnavailableException [Root exception is java.net.UnknownHostException: Unknown protocol: 'RMI']
at weblogic.jndi.internal.ExceptionTranslator.toNamingException(ExceptionTranslator.java:34)
at weblogic.jndi.WLInitialContextFactoryDelegate.toNamingException(WLInitialContextFactoryDelegate.java:787)
at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:368)
at weblogic.jndi.Environment.getContext(Environment.java:315)
at weblogic.jndi.Environment.getContext(Environment.java:285)
at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:117)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:667)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:288)
at javax.naming.InitialContext.init(InitialContext.java:223)
at javax.naming.InitialContext.<init>(InitialContext.java:175)
at com.example.cms.engine.ui.t5.pages.Welcome.init(Welcome.java:26)
thanks in advance for any help,
HarryHow are you trying to connect to the server?
An example:
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import java.util.Hashtable;
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private static Context context;
private LookUP() {
static {
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hashtable.put(Context.PROVIDER_URL, "t3://172.31.0.107:7002,172.31.0.107:7003");
//hashtable.put(Context.SECURITY_PRINCIPAL, "username");
//hashtable.put(Context.SECURITY_CREDENTIALS, "password");
long begin = System.currentTimeMillis();
try {
context = new InitialContext(hashtable);
} catch (NamingException e) {
e.printStackTrace();
long end = System.currentTimeMillis();
long timeseconds = (end - begin) / 1000;
System.out.println("initialcontext creation time " + timeseconds);
public static Context getContext() {
return context;
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When the wlfullclient.jar is used than the t3 protocol is used (newer version of weblogic also ship a wlthint3client.jar) -
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Hi,
I am using plain web application where i want to use commonJ workmanager to do same i have done following steps
1. Define work manager in weblogic.xml
<work-manager>
<name>LogWorkmanager</name>
<min-threads-constraint>
<count>5</count>
</min-threads-constraint>
</work-manager>
2. Define resource in web.xml file
<resource-ref>
<res-ref-name>LogWorkmanager</res-ref-name>
<res-type>commonj.work.WorkManager</res-type>
<res-auth>Container</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>
3. Use JNDI mapping to get workmanager as:
InitialContext ic = new InitialContext();
commonj.work.WorkManager wm = (commonj.work.WorkManager)ic.lookup("java:comp/env/LogWorkmanager");
Here at step 3 I am getting classcast exception as java.lang.ClassCastException: weblogic.work.j2ee.J2EEWorkManager.
Could you please guide me where I am making mistake as I have defined resource ref point to commonj.workmanager and used same name in lookup method still why i am getting J2EEWorkManager instead of commonJ workmanager.
Thanks,
YuvrajCan you run a little test. See if the following works:
In your web.xml
<!-- default weblogic work manager -->
<resource-ref>
<res-ref-name>default</res-ref-name>
<res-type>commonj.work.WorkManager</res-type>
<res-auth>Container</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>In your code you can use something like:
import commonj.work.WorkManager;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class TestServlet extends HttpServlet {
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
getDefaultWorkManager();
private WorkManager getDefaultWorkManager() {
WorkManager defaultWorkManager = null;
try {
Context context = new InitialContext();
defaultWorkManager = (WorkManager) context.lookup("java:comp/env/default");
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e.printStackTrace();
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You can get all the lists of fixes been made in WLS 9.2 MP3 in the below link.
http://download.oracle.com/docs/cd/E13222_01/wls/docs92/issues/known_resolved.html
Ravish Mody
http://middlewaremagic.com/weblogic
Come, Join Us and Experience The Magic… -
Hi experts,
We had an issue with portal access. I wonder if portal is venerable for security threats?
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Regards
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Hello!
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After a few days of code writing and extensive research on the web I am completely stopped and do not know where to move further...
I have two containers: web and EJB. Thne I created two users at GlassFish AS (SUN Application Server) in file realm: admin and user.
URL request to servlet asks for name and password. In the web container I get proper roles (matched to login name) when I ask:
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When I check the principal there it is always ANONYMOUS.
The web service is called over plain http, not secured.
If I use similar construction but with only stateless bean (not web service) I get Caller id propagation and I can see in the EJB container that admin or user logged in.
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import javax.servlet.http.*;
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response.setContentType("text/html");
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System.out.println(e);
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try{
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conn = DriverManager.getConnection
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catch(SQLException se) {
System.out.println(se);
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String Uemail = request.getParameter("Uemail");
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System.out.println (stmt2);
out.println(stmt2);
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out.println("</BODY></HTML>");
stmt2.close();
conn.close();
}catch(SQLException se) {
System.out.println(se);
}Message was edited by:
Altered_Carbon
Message was edited by:
Altered_Carbon
I also realise that this is a more MYSQL titled problem, but those forums look rubbish <_<Investigate PreparedStatement.
Currently you're trying to insert a value "Ufirst_name" instead of the value of the variable called Ufirst_name.
It's possible to do this (you could do something like this: "... '" + UfirstName + "' ...") but DEFINITELLY NOT RECOMMENDED. Instead use a prepared statement.
D. -
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Regards
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initialBeansInFreePool = "20",
defaultTransaction = MessageDriven.DefaultTransaction.NOT_SUPPORTED,
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<resource-ref>
<res-ref-name>MyWorkManager</res-ref-name>
<res-type>commonj.work.WorkManager</res-type>
<res-auth>Container</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>
weblogic-ejb-jar.xml
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<res-ref-name>MyWorkManager</res-ref-name>
<jndi-name>wm/MyWorkManager</jndi-name>
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</bean>Edited by: user11950954 on Sep 28, 2009 12:43 PMSo in this case I should be able to perform a JNDI lookup and get the commonj WorkManager which maps to the WLS Work Manager?Yes, for example:
weblogic-application.xml :-
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*<name>MyWorkManager</name>*
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<goal-ms>1000</goal-ms>
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</work-manager>
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@ResourceRefs({
@ResourceRef(
name = *"MyWorkManager"*,
type = "commonj.work.WorkManager",
auth = ResourceRef.Auth.CONTAINER,
sharingScope = ResourceRef.SharingScope.SHAREABLE,
jndiName = *"MyWorkManager"* )
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<resource-ref>
*<res-ref-name>MyWorkManager</res-ref-name>*
<res-type>commonj.work.WorkManager</res-type>
<res-auth>Container</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>
weblogic-ejb-jar.xml should be look like this :-
<resource-description>
*<res-ref-name>MyWorkManager</res-ref-name>*
*<jndi-name>MyWorkManager</jndi-name>*
</resource-description>
JNDI Lookup:-
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Edited by: Betino on 29/09/2009 12:45 PM -
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Coreservlet tutorials: [http://courses.coreservlets.com/Course-Materials/] -
Mildet connect to oracle DB using servlet problem ,help please
hi guys i have a problem am tring to connect my midlet to databse through midlet but i don`t know what is the problem so far the midlet already connect to my servlet url but the servlet cant read the parameters to open the connection for database
my servlet code
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* and open the template in the editor.
import java.io.*;
import java.net.*;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.text.*;
* @author freddy
public class getconnection extends HttpServlet {
Statement statement;
ResultSet rs=null;
String bstr=null;
String bstr1=null;
String bstr2=null;
public void init()
* Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
* @param request servlet request
* @param response servlet response
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try {
/* TODO output your page here
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet getConnection</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Servlet getConnection at " + request.getContextPath () + "</h1>");
out.println("</body>");
out.println("</html>");
} finally {
out.close();
// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
* Handles the HTTP <code>GET</code> method.
* @param request servlet request
* @param response servlet response
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
doPost(request,response);
* Handles the HTTP <code>POST</code> method.
* @param request servlet request
* @param response servlet response
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
DataInputStream in = new DataInputStream(
(InputStream)request.getInputStream());
String sid = in.readUTF();
String user = in.readUTF();
String pwd = in.readUTF();
// "jdbc:oracle:thin:@localhost:1521"+": "+sid
String message = message = "Name:"+bstr+" telephone:"+bstr1+" burthday:"+bstr2;
try {
connect(sid,user, pwd);
message += "100 ok connected";
} catch (Throwable t) {
message += "200 " + t.toString();
response.setContentType("text/plain");
response.setContentLength(message.length());
PrintWriter out = response.getWriter();
out.println(message);
in.close();
out.close();
out.flush();
private void connect(String sid, String user,String pwd)
throws Exception {
// Establish a JDBC connection to the MYSQL database server.
//Class.forName("org.gjt.mm.mysql.Driver");
Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:"+sid,user,pwd);
System.out.print("connected");
try{
statement =conn.createStatement();
rs=statement.executeQuery(" Select*from WOH.P_DEMGRAPHICS where P_ID='P1000 '");
catch(SQLException e)
System.err.print(e);
try{
while (rs.next()) {
bstr=rs.getString(2);
bstr1=rs.getString(3);
bstr2=rs.getString(4);
statement.close();
catch (SQLException e) {
//bstr += e.toString();
System.err.println(e);
System.exit(1);
// Establish a JDBC connection to the Oracle database server.
//DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
//Connection conn = DriverManager.getConnection(
// "jdbc:oracle:thin:@localhost:1521:"+db,user,pwd);
// Establish a JDBC connection to the SQL database server.
//Class.forName("net.sourceforge.jtds.jdbc.Driver");
//Connection conn = DriverManager.getConnection(
// "jdbc:jtds:sqlserver://localhost:1433/"+db,user,pwd);
* Returns a short description of the servlet.
public String getServletInfo() {
return "Short description";
// </editor-fold>
}Midlet code
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import java.io.*;
import java.util.*;
import javax.microedition.io.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
* @author freddy
public class testOrcl extends MIDlet implements CommandListener {
protected String url;
private String username;
private Display display;
private Command exit = new Command("EXIT", Command.EXIT, 1);;
private Command connect = new Command("Connect", Command.SCREEN, 1);
private TextField tb;
private Form menu;
private TextField tb1;
private TextField tb2;
DB db;
public testOrcl() throws Exception
display=Display.getDisplay(this);
url="http://localhost:8084/getConnection/getconnection";
public void startApp() {
displayMenu();
public void displayMenu()
menu= new Form("connect");
tb = new TextField("Please input database: ","",30,
TextField.ANY );
tb1 = new TextField("Please input username: ","",30,
TextField.ANY);
tb2 = new TextField("Please input password: ","",30,
TextField.PASSWORD);
menu.append(tb);
menu.append(tb1);
menu.append(tb2);
menu.addCommand(exit);
menu.addCommand(connect);
menu.setCommandListener(this);
display.setCurrent(menu);
public void pauseApp() {
public void destroyApp(boolean unconditional) { }
public void commandAction(Command command, Displayable screen) {
if (command == exit) {
destroyApp(false);
notifyDestroyed();
} else if (command == connect) {
db = new DB(this);
db.start();
db.connectDb(tb.getString(),tb1.getString(),tb2.getString());
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* and open the template in the editor.
import java.io.*;
import java.util.*;
import javax.microedition.io.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.lang.*;
* @author freddy
public class DB implements Runnable {
testOrcl midlet;
private Display display;
String sid;
String user;
String pwd;
public DB( testOrcl midlet)
this.midlet=midlet;
display=Display.getDisplay(midlet);
public void start()
Thread t = new Thread(this);
t.start();
public void run()
StringBuffer sb = new StringBuffer();
try {
HttpConnection c = (HttpConnection) Connector.open(midlet.url);
c.setRequestProperty(
"User-Agent","Profile/MIDP-2.1, Configuration/CLDC-1.1");
c.setRequestProperty("Content-Language","en-US");
c.setRequestMethod(HttpConnection.POST);
DataOutputStream os =
(DataOutputStream)c.openDataOutputStream();
os.writeUTF(sid.trim());
os.writeUTF(user.trim());
os.writeUTF(pwd.trim());
os.flush();
os.close();
// Get the response from the servlet page.
DataInputStream is =(DataInputStream)c.openDataInputStream();
//is = c.openInputStream();
int ch;
sb = new StringBuffer();
while ((ch = is.read()) != -1) {
sb.append((char)ch);
showAlert(sb.toString());
is.close();
c.close();
} catch (Exception e) {
showAlert(e.getMessage());
/* This method takes input from user like db,user and pwd and pass
to servlet */
public void connectDb(String sid,String user,String pwd) {
this.sid = sid;
this.user = user;
this.pwd = pwd;
/* Display Error On screen*/
private void showAlert(String err) {
Alert a = new Alert("");
a.setString(err);
a.setTimeout(Alert.FOREVER);
display.setCurrent(a);
Comment out process request or rewrite & move it to a position after you read the parameters and connect to the db. Decide where you want to write to the output stream. Also, you have some superfluous casting.
I take it that you are using netbeans? If you debug and step through the code you will get an idea of the flow. The steps should be, midlet connects with POST, doPost is called, server reads parameters, server opens connection, executes query, releases/closes connection, and writes a response to the midlet.
Some notes about the connect method; The scope of rs may cause problems. It is unlike you will have a valid result set if you have a problem with create statement or execute. Take a look at connection pooling and be mindful how the connections are opened, used, and closed; put all the important cleanup operations in a finally. Remove system.exit from your servlet. Actually I would suggest limiting the scope of all your vars;
If you store the username, password, and sid on the midlet, you may have trouble updating the installation base if you need to change the values for any reason. Also, you have clients which contain your database u/p, susceptible to snooping and decompilation. Use the servlet to abstract the db from the client. And use a datasource (with connection pooling) for obtaining connections to db.
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