How to run class after Tomcat starts?

Hello!,
I want to run a class after Tomcat start.
How can I achieve?
Reg,
Chetan

Well the official way to do it it to create a class which implements org.apache.catalina.LifecycleListener. Then you can name the class in a <Listener> element in server.xml. It can appear at various levels e.g. inside the Engine block, and it will receive notification when that level starts and stops.

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How to run servlets in tomcat

Hi ,
How to run servlets in tomcat server. I created two files html and servlet file.
Html file
callservlet.html
<html>
<body>
<form method=post action="servletcalled.class">
<input type=submit value="submit">
</form>
<body>
</html>
servlet file
servletcalled.java contains
public void doPost(HttpServletRequest req,HttpServletResponse res ){
java.io.PrintWriter out = req.getWriter();
out.println("Hi, executed");
i put the callservlet.html in webapps/examples/ and servletcalled.class was in webapps/examples/Web-inf/classes/
After starting the tomcat and running the program html file is getting exceuted but when i click on the submit button this error is prompted
type Status report
message servletcalled.class
description The requested resource (servletcalled.class) is not available.
Thanks in advance

Thanks,
I created a new directory in webapps
s "webapps/test".
Test directory contains
1. callservlet.html file
2. another directory Web-inf (i.e,
webapps/test/Web-inf)
Web-inf directory contains
1. web.xml file
2. another directory classes (i.e,
webapps/test/Web-inf/calsses)
classes directory contains
1. servletcalled.class file
web.xml file contains
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web
Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<servlet>
<servlet-name>Example</servlet-name>
<servlet-class>Example</servlet-class>
</servlet>
</web-app>
-->should be: <servlet-class>servletcalled</servlet-called>
then in the <web-app> scope define this:
<servlet-mapping>
<servlet-name>Example</servlet-name>
<url-pattern>/servlets/Example</url-pattern>
</servlet-mapping>
>
thanks in advance i am working hard on that but
notable to get the solutionbtw by reading the documentation of tomcat and tutorials of jave on the java site (here), you would have known this!

How to Run servlet in Tomcat 5.5.9

hi
How to run servlet in tomcat 5.5.9?how to set context path in server.xml of conf folder in tomcat since there is no context tag in server.xml.
Jiten

Hi ! I have a similar problem, well, it's along the same line ...
I'm using NetBeans 4.1, and i've coded a servlet. Using NetBeans to launch my servlet (with the bundled Tomcat 5.5.7) works fine, however i need to deploy my application unto a Tomcat 5.5.9 server.
Thus, i copied the WAR file generated by NetBeans into the Tomcat 5.5.9 webapps directory, and Tomcat expands it.
Problem is when i run my JSP pages with the form tags, they do not work on the Tomcat 5.5.9 environment. Anyone knows why?
(These work on the NetBeans Tomcat bundle 5.5.7)
My form action :
<form name="index" method="get" action="PageServlet">
My web.xml :
<servlet>
<servlet-name>PageServlet</servlet-name>
<servlet-class>application.PageServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>PageServlet</servlet-name>
<url-pattern>/PageServlet</url-pattern>
</servlet-mapping>
I'm really stumbed on why it doesn't work in Tomcat 5.5.9, any help is greatly appreciated, thanks in advance ^_^

How to run Servlet in Tomcat 5.5.7 Server

Hi,
How to run Servlet in Tomcat 5.5.7 Server. I mean where I should copy my *.class file.
Thanks in Advance.
bbye.

In order to complile the servlet you need to tell java where to find the servlet libary (as stated above by setting the class path). or (much easier IMO)
copy the servlet-api.jar to
JavaInstallDirectory\jre\lib\ext

How to run jsp in tomcat server

hi this is satish1529,
i am new to jsp technology,i have written small jsp file and html file,i don't know where to place jsp and html files in tomcat server and where i have to do setting in the server and how to run jsp file. pls give me step by step describing how to run jsp in tomcat server.
i am showing u files
this is jsp file
<html>
<body>
<center> data recieved from client <center>
<%
String s= request.getParameter("t1");
String a= request.getParameter("t2");
%>
username :<%=s%><br>
address :<%=a%>
</body>
</html>
this is html file
<html>
<body>
<form action="http://localhost:8080/form.jsp">
enter name <input type="text" name="t1"> <br>
enter address <textarea name="t2"> </textarea> <br>
<input type="submit" vaule="login">
</form>
</body>
</html>

Thanx a lot for ur promt reply.
we r succful in running simple jsp in tomcat6.0.
bt one more problem occured as following when we r trying to run jsp file in tomcat.
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException: /main1.jsp(1,1) The value for the useBean class attribute webCounter is invalid.
     org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
     org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
     org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:148)
     org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1200)
     org.apache.jasper.compiler.Node$UseBean.accept(Node.java:1155)
     org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2336)
     org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2386)
     org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2392)
     org.apache.jasper.compiler.Node$Root.accept(Node.java:489)
     org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2336)
     org.apache.jasper.compiler.Generator.generate(Generator.java:3374)
     org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:210)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:306)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:286)
     org.apache.jasper.compiler.Compiler.compile(Compiler.java:273)
     org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:566)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
note The full stack trace of the root cause is available in the Apache Tomcat/6.0.13 logs.

How to Run JSP in Tomcat Server 3.3.2

Hi all,
i have just installed tomcat server 3.3.2 in my system which as windows xp home edition as a operating system and no problem i can able to start the tomcat server.But the problem is that i dont no how to run jsp in tomcat i listed some of my problems below..
How to put my jsp file in the virtual directory(default and also i want to create ) then tell me how use IE to run the JSP file.
Thanks in advance..
With Regards
Vijay

Hi all,
i have just installed tomcat server 4.1 in my
system which as windows NT 4.0 home edition as a
operating system and no problem i can able to start
the tomcat server.But the problem is that i dont no
how to run jsp in tomcat i listed some of my problems
below..
How to put my jsp file in the virtual
directory(default and also i want to create ) then
tell me how use IE to run the JSP file.
Thanks in advance..
With Regards
Baliram

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How to run Servlet on Tomcat 4.0.1?

OK. I've made a simple servlet and using Tomcat 4.0.1 on Windows ME. Tomcat's root directory is C:\jakarta-tomcat-4.0.1\webapps\ROOT. I copied folder with my servlet (java's class) in tomcat's root folder. When I try to run the dialog 'File Download' is showen. Why?
Thanks.

I have Tomcat 4.0. I am trying to run servlet but I could not manage it. I have put my class file in webapp/root/web-inif/classes/ I can not run my servlet... how can I manage this... what should I do more?
the errors are :
type Exception report
message Internal Server Error
description The server encountered an internal error (Internal Server Error) that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Cannot allocate servlet instance for path /servlet/Servlet1
     at org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:419)
     at org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:180)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1027)
     at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125)
     at java.lang.Thread.run(Thread.java:484)
root cause
java.lang.NoClassDefFoundError: Servlet1 (wrong name: servlet/Servlet1)
     at java.lang.ClassLoader.defineClass0(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:486)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:111)
     at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1643)
     at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:937)
     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1372)
     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1254)
     at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:867)
     at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:655)
     at org.apache.catalina.servlets.InvokerServlet.serveRequest(InvokerServlet.java:400)
     at org.apache.catalina.servlets.InvokerServlet.doGet(InvokerServlet.java:180)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:243)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:190)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2347)
     at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:468)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
     at org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
     at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
     at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
     at org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1027)
     at org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1125)
     at java.lang.Thread.run(Thread.java:484)

Call a class after successfuly starting weblogic server

I need to create a class which which some parameter and start a application automatically just after starting weblogic server so that when user request for application he will get quick response. Actually my application takes some time to be start service so that the very first user need to wait for some time.
I am facing the exception of not founding initial context is thrown because the load-on-startup and
by creating startup class the classes are loaded before the server comes in to running state.
In that case the server doen't have its host name and port configurated.
At the time of application setup we need to get the initial context from t3: by using
host and port. At this stage any of the process is unable to get the context.
Is there any way by which we can automatically call a class after starting the server.

I have deployed a ear file.
which has one Ear project and one ejb module and one portal application and about 4 web applications.
One of my webapplication need to be started before the user start working on any web application.
I have tried to configure and run you suggestion but i am unable to find the place where should i put the listener and startup class entry. my ear project has weblogic-application.xml file i shall put these entry there then xml doesn't validate and i shall get the project compile error. and same case with the application.xml of ear project and portal application weblogic.xml and web.xml file. I have found only one which is not giving compile time error is wlw-config.xml in portal application.
I am working on weblogic workshop 10.2
if you have any idea about that where i can put these configuration entry so that the class will called on firing event by server. then please let me know.
thanks in advance.

How to run servlet with tomcat

I have a probrom that how can I run servlet with tomcat?
I have new a folder classes in webapps\root\WEB-INF\,and put the .class
programme in it ,but http://localhost:8080/servlet/HelloWorldExample
can't run ,it give me a error than http:404 not found.
could you tell me how i can solve the problem.
Thank u very much.

Hi,
Make sure the class is in classpath or in WEB-INF/classes folder and make an entry for servlet tag in web.xml in WEB-INF folder.
Regards

How to run executable after installation?

Hi everyone,
I created an installer from one labview program with the application builder
of Labview7.1 for my customer, and this installer will be burned
on a CD. There are several configuration files which should be always
modified, so I want to give the customer a possibility that he can
change them by himself without creation of a new installer , I think the
"run executable after installation" is the way to do it, but I don't know
how to implement such an executable command to copy some files from CD to
the destination directory which the program should be installed, could
anyone give me some tips? Thans a lot!
Le

When you setup your build file, add the files using SourceFile Tab>>add support files, then click on custom destination, here you can add support files during installation. Hope this is what you are looking for.
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Paul Falkenstein
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CLA, CPI, AIA-Vision
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How to run servlets under Tomcat 6 in java1.5

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A 503 response says
503 Service Unavailable
The server is currently unable to handle the request due to a
temporary overloading or maintenance of the server
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Add the .class file containing the public static void main(...) method to the project by clicking on the + toolbar button in the navigator, open the project properties and properly set the additional classpath then right click on the .class in the navigator and say run. It should work, I've just tried it.
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How to run JSP in Tomcat

Hi i am new to java web application, i am running JSP(edited in notepad) in tomcat
<html>
<head>
<title>first jsp page</title>
</head>
<body>
<%! String st = "shyam your JSP Code" %>
Welcome ::<%= st %>
</body>
</html>
i saved this jsp as first.jsp and D:\shyam\Apache Software Foundation\Tomcat 5.0\webapps\ROOT putting jsp in this folder.
then started tomcat webserver
then opeand browser giving URL: http://localhost:8080/first.jsp
the error coming like--> HTTP status 500
exception
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root cause:
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hi,
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before running your application create a ".bat" file like,
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My J2EE requires a lot of initialization action for data caching and resources preload. Typically, this initialization action takes 5 mins to finish. I execute this action in my servlet's init() function, which is invoked during OC4J. However, in my oc4j, I need to run 5 J2EE applications of this kind. It means my OC4J takes 25 mins to start. It makes my oc4j 'seems to be' failed to start for most of the time.
Apart from servlet's init() and startup class, is there any way I can execute my initialization actions AFTER oc4j startup? It can at least make my oc4j start normally and timely. Thx

There's no inherent functionality in OC4J that can do this for you. I think you need to look at your architecture -- if this was me, I'd be offloading the work to a MDB or something of that manner so it can be executed asynchronously and in parallel. The tricky bit there is to work out how to stop the corresponding applications from being used until there cache initialization is completed, and perhaps also sharing the cache between the worker and the consumer. You could synchronize the application aliveness on a file, or perhaps use an MBean in which an active attribute is checked by the application and updated from the end result of the MDB processing.
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How to run class after Tomcat starts?

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