J2EE and Tomcat

Hi,
I have a book from 2001that says "One of the requirements of any J2EE implementation is a servlet container. If you're using Tomcat for servlet development and deployment, it conflicts with the servlet container."
I am really confused by this because I dont know why you would use 2 servlet containers?
Also in what way do they conflict?
It later goes on to say "An adapter is under development for Tomcat 3.2 that addresses this problem".
This is obviuosly out of date, however I am using Tomcat 5.0 and was wondering if it is now a built in functionality or is it still a problem?
My requirements are to use Tomcat as the servlet container and web server and J2EE for just the JDK. I know that I only needed J2SE to do this, but I have it installed now and wanted to know if I will have any problems with this setup in the future for what I want to do.
Thanks,
Omeed

If you are looking to write JSPs and Servlets only then you can use Tomcat which contains an HTTP server and a web container to host your JSPs and servlets. Sun's SDK contains all the same functionality as Tomcat and more. The SDK is a fully compliant J2EE platform which implies all the features of Tomcat plus a whole lot more. The SDK contains all the technologies required by the J2EE platform spec. So the SDK is really a super set of the technology contained in Tomcat. Anything you can do with Tomcat you can do with the SDK.

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Latest java and tomcat version

what's the latest java and tomcat version? i would be migrating from j2se 1.4 and tomcat 4.1 to the latest j2ee and tomcat. it also has to be compatible with Novell
Thanks

But only the Application Server is a BETA release.
i don't need the Sun Application Server, because I'm
using TomcatYes, you don't need it and I don't think that was the point which you have been asking. When the J2EE 5 SDK will be officially released, you will find it on the main download page, rather than a preview and the Sun application server is bundled with the J2EE SDK, whether you need it or not. Anyway, JBoss has already released its latest version for the new specifications, mainly the ERB 3.0 implementation.

Difference between J2EE, Apache WebServer and Tomcat

Hi,
today I read a lot about WebServers and HTTPClients, ..... Now I am totaly confused. Does J2EE uses Apache and Tomcat or not? And what are the differences between these three implementations?
Thanks,
Sabine

The J2EE SDK and the SJSAS PE 8.0 use Tomcat as a web container.
The J2EE platform provides for many additional services, such as EJB, Connectors, which are not provided by Tomcat.
Please refer to the J2EE Platform spec for additional details.

Few questions about j2ee and my program

Hello
I'm new on this forum and in j2ee :)
I've to write program which should be in working similar to video on demand system but without streaming movies only database and etc.
I'm gonna write database in mysql. It will contain user and movies. I'll use the tomcat server.
Can you tell me what should i learn to do it, i mean can i use jdbc to do it or maybe i should use something diffrent, and what will i need more i mean jsp, servlets?
Sorry for such a question but i'm just beginner in j2ee and i hope you will help me :)

Hello
I'm new on this forum and in j2ee :)Welcome.
I've to write program which should be in working
similar to video on demand system but without
streaming movies only database and etc."streaming database"? Not sure what you mean.
I'm gonna write database in mysql. It will contain
user and movies. I'll use the tomcat server.Sounds ambitious for somebody who's new to Java and Java EE
Can you tell me what should i learn to do it, i mean
can i use jdbc to do it or maybe i should use
something diffrent, and what will i need more i mean
jsp, servlets?Yes, learn JDBC. And servlets and JSPs. That's quite a lot.
Sorry for such a question but i'm just beginner in
j2ee and i hope you will help me :)I don't know how this helps you. It seems to go without saying: If you want to write Java EE applications, you should know Java EE well.
%

New to J2EE and web development in java

Hi folks,
I have been developing desktop app in C# for the past two years. But now I am taking my masters and I am learning in Java. I am also interested in J2EE and wanted to develop web apps in Java. The problem is, I am very much confused with the tools, classes and etc Java uses. For example people say to me, you have to know Struts, Spring, JSP, Ant, Tomcat, Apache Tomcat, Hibernate, and etc. I tried to search every one of those and got some clue but not that much detail and now I am really confused.
Before I go to coding (which is my interest), I wanted to know what tools to know and why and how they are used, at least the basics. Once I get some idea, I will keep on searching by myself. Can any body please tell me or give me a link of what tools I have to start with as a begineer web developer? Can any body give me a brief description about them?I downloaded Eclipse and I am almost familier on how to use it and I also write some code on it. These days, I downloaded J2EE, Struts, and Hibernate but I dont know how to use them and where to use them. No clue. Help me guys.
Thank you.

Step 1 : Download "Eclipse IDE for Java EE Developers". You don't need anything else in terms of tools at the start.
Step 2 : Get solid experience in basic Java development. Make sure you are very comfortable with the language and core API classes such as I/O, collections, etc. Do this in a basic Java project in Eclipse.
Step 3 : Learn JSP and Servlets. These two technologies are the foundation of Java EE web app development. Use "Dynamic Web Project" in Eclipse and Tomcat as your server. For a good exercise, build a web app to manage a catalog of something by reading/writing to a text file local to the server.
Step 4 : Learn JPA. This is the standard for modern Java database access. Make sure you learn JPA standard rather than a specific implementation like Hibernate. In fact, since you are asking on an Oracle site, I would recommend EclipseLink implementation of JPA rather than Hibernate. For an exercise take your app from Step 3 and make it use a database instead of a file. Use MySQL as your database.
By the time you get this far you will have a good foundational knowledge of Java EE web development. Where you go from here will depend on your interests. If you are more interested in the web tier, you can learn some of the higher-level front-end technologies such as JSF or Struts that make it easier to build very large apps. If your interests are more in middle tier and scalability, start learning EJBs. Don't bother learning Ant or Maven unless your interests are specifically in build systems and release engineering. You don't need to know Ant/Maven to build/run/export Java EE applications in Eclipse.
Good luck!
- Konstantin

Communication problem between NetBeans and Tomcat

hi!
i got a quite mysterious problem. here is what happens:
- i start NetBeans 5.5.1 (the first time)
- i want to debug my JSF-Project, the Debugger starts
- After a few seconds the debugger waits for tomcat (it sais: "Waiting for Tomcat...") and tomcat starts
- Again after a few seconds the tomcat-debugger-output sais "Tomcat startet in 3333 ms".
okay.
when i enter http://localhost:8084/ in my browser i get the tomcat homepage, so the server has definitely started! But nothing happens in NetBeans and nothing happens with my project....
In the lower-right corner i see this blue working-bar that sais "deploying project" but nothing happens. The Project-Debugger-Output still sais "Waiting for Tomcat..." but nothing happens...
And after something around 3 minutes (i guess it's a timeout) i get the error "Starting of Tomcat failed." But is HAS started, i can login to the Administration-Area in my browser!
so i guess there is a communication problem between netbeans an tomcat. Netbeans waits for a message from tomcat but tomcat doesn't send it..or netbeans doesn't understand it.
But the story goes on:
When i press the debug-button a second time it takes only a few seconds till i get the message: "Tomcat server port 8084 already in use". OF COURSE! Because Tomcat has already startet and can't be stoped by NetBeans.
i'm trying to solve this problem for 4 days now, so i would be very happy if anyone has an idea where to start/continue the search...
thanks,
flo.
some system-info:
- windows vista business 32-bit
- no firewall is running
- AntiVir Personal Edition IS running
- Yahoo Widgets Engine IS running
- no other software is running
and finally the tomcat-log:
Using CATALINA_BASE: C:\Users\Administrator\.netbeans\5.5.1\apache-tomcat-5.5.17_base
Using CATALINA_HOME: C:\Program Files\NetBeans\enterprise3\apache-tomcat-5.5.17
Using CATALINA_TMPDIR: C:\Users\Administrator\.netbeans\5.5.1\apache-tomcat-5.5.17_base\temp
Using JRE_HOME: C:\Program Files\Java\jdk1.5.0_12
Listening for transport dt_shmem at address: tomcat_shared_memory_id
21.09.2007 18:27:50 org.apache.catalina.core.AprLifecycleListener lifecycleEvent
INFO: The Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jdk1.5.0_12\bin;.;C:\Windows\system32;C:\Windows;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Program Files\QuickTime\QTSystem\;C:\Program Files\ThinkPad\ConnectUtilities;C:\Program Files\Common Files\Teleca Shared;C:\Program Files\Common Files\Adobe\AGL;C:\Program Files\MySQL\MySQL Server 5.0\bin;C:\Program Files\cvsnt;
21.09.2007 18:27:50 org.apache.coyote.http11.Http11BaseProtocol init
INFO: Initializing Coyote HTTP/1.1 on http-8084
21.09.2007 18:27:50 org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 1862 ms
21.09.2007 18:27:50 org.apache.catalina.core.StandardService start
INFO: Starting service Catalina
21.09.2007 18:27:50 org.apache.catalina.core.StandardEngine start
INFO: Starting Servlet Engine: Apache Tomcat/5.5.17
21.09.2007 18:27:50 org.apache.catalina.core.StandardHost start
INFO: XML validation disabled
21.09.2007 18:27:53 org.apache.coyote.http11.Http11BaseProtocol start
INFO: Starting Coyote HTTP/1.1 on http-8084
21.09.2007 18:27:54 org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
21.09.2007 18:27:54 org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/31 config=null
21.09.2007 18:27:54 org.apache.catalina.storeconfig.StoreLoader load
INFO: Find registry server-registry.xml at classpath resource
21.09.2007 18:27:54 org.apache.catalina.startup.Catalina start
INFO: Server startup in 3626 ms

As i wrote before, the same problem occured for me. I have found a solution which is : Go to tools menu and then select options . In the proxy info, select No Proxy.
I hope this help you

Problem launching a jsp page with eclipse and tomcat

Hi,
I have just started using eclipse and tomcat for creating dynamic web pages. I tried to launch a jsp page after starting the tomcat server with the URL: http://locahost:8080/HelloWorld/, an error page was displayed as below:
HTTP Status 404 -/
type Status report
message /_
description The requested resource (-) is not available
Apache Tomcat/5.5.17
I didn't get any error at the console and when i just typed http://localhost, a pop up menu saying that the connection was refused when attempting to contact localhost.
I'm not sure what is the problem here. Could it be the permssion to the localhost is not granted by the system as the eclipse IDE is running using linux?
Hope someone can help.
Thanks.

http://www-128.ibm.com/developerworks/library/os-ectom/

Right problem with apache and tomcat

Bonjour;
I use a user login "apache" to stop/start Apache and tomcat. Because never launching apache et tomcat as root.
But I have the following problem with apache (file error.log) :
[Tue May 6 17:26:22 2003] [error] Connection "warpConnection" cannot connect
[Tue May 6 17:26:22 2003] [error] Cannot open connection "warpConnection"
[Tue May 6 17:27:01 2003] [error] Re-Trying to deploy connections
As root the error msg does'nt exists (lost)
Best regards;
A+;

Run it from the shell to see whats wrong:
# httpd

Authentication problem with JWS and TOMCAT

Hi everyone !
I have a problem with Java Web Start (1.0.1) and Tomcat (4.0.4).
I'm trying to call my application via Web server Tomcat with restricting access.
My configuration is the following :
The deployment descriptor web.xml is:
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE web-app
PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<mime-mapping>
<extension>jar</extension>
<mime-type>application/java-archive</mime-type>
</mime-mapping>
<mime-mapping>
<extension>java</extension>
<mime-type>text/plain</mime-type>
</mime-mapping>
<mime-mapping>
<extension>jnlp</extension>
<mime-type>application/x-java-jnlp-file</mime-type>
</mime-mapping>
<mime-mapping>
<extension>JNLP</extension>
<mime-type>application/x-java-jnlp-file</mime-type>
</mime-mapping>

<security-constraint>
<web-resource-collection>
<web-resource-name>Entire Application</web-resource-name>
<url-pattern>/*</url-pattern>
</web-resource-collection>
<auth-constraint>

<role-name>standard</role-name>
</auth-constraint>
</security-constraint>

<login-config>
<auth-method>BASIC</auth-method>
<realm-name>MY APPL</realm-name>
</login-config>
</web-app>
And jnlp File is:
<jnlp
spec="1.0+"
codebase="http://host:8080/Official/"
href="Application.jnlp">
<information>
<title>Application release 0.10</title>
<vendor> XXXX </vendor>
<homepage href="/"/>
<description>Application</description>
<description kind="short">My Application</description>
<icon href="Icon.gif"/>
</information>
<security>
<all-permissions/>
</security>
<resources>
<j2se version="1.3"/>
<jar href="Jar1.jar"/>
<jar href="Jar2.jar"/>
<jar href="Jar3.jar"/>
<jar href="Jar4.jar"/>
<jar href="Jar5.jar"/>
<jar href="Jar6.jar"/>
<jar href="Jar7.jar"/>
<jar href="Jar8.jar"/>
<jar href="Jar9.jar"/>
<jar href="Jar10.jar"/>
<jar href="MyApplication.jar"/>
</resources>
<application-desc main-class="com.xxxx.tool.cm.MyApplication"/>
</jnlp>
With the above configuration the Java Web Start not work.
I'm expecting the message box for insert username and password instead it returns the messagge error :
An error occurred while launching/running the application.
Vendor: XXXX
Category: Download Error
Unable to load resource: http://host:8080/Official/Application.jnlp
The Exception error is:
JNLPException[category: Download Error : Exception: java.lang.NullPointerException : LaunchDesc: null ]
     at com.sun.javaws.cache.DownloadProtocol.doDownload(Unknown Source)
     at com.sun.javaws.cache.DownloadProtocol.isLaunchFileUpdateAvailable(Unknown Source)
     at com.sun.javaws.LaunchDownload.getUpdatedLaunchDesc(Unknown Source)
     at com.sun.javaws.Launcher.downloadResources(Unknown Source)
     at com.sun.javaws.Launcher.handleApplicationDesc(Unknown Source)
     at com.sun.javaws.Launcher.handleLaunchFile(Unknown Source)
     at com.sun.javaws.Launcher.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
I have tried to remove the restrict access in the deployment descriptor (web.xml) and java Web Start WORKS !!!!!!
I'll appreciate any idea or hint!
Thanks in advance

Check this out
http://forum.java.sun.com/thread.jsp?forum=38&thread=456250
Mad Einstein

Why do I need to restart Apache and Tomcat every time a java file is change

If a java file is changed and complied the changes are not reflected if Tomcat is not restarted.
The settings in server.xml are as:

<Context path="/manager" docBase="manager" debug="0" privileged="true"/>
<Context path="/cf" docBase="cf" debug="0" reloadable="false"/>
Here "cf" is my Application folder under webapps. The reloadable property when set to "true" for standalone Tomcat on Windows98 reflects the changes for compiled java files without restarting Tomcat. But on Linux 7.1 with Apache 1.3.19 and Tomcat 4.0.3 this is not working.
Also tried out with Manager Application of tomcat-users.xml with reloadable="false" as well as reloadable="true",
But when I reload the application using the command
http://servername:8080/manager/reload?path=/appli.name
It tells me that the application is reloaded but changes in the java file are still not reflected.
Also when reloaded through Manager Servlet, Only my load-on-startup servlet is reloaded, but other java classes are not.
Is it neccessary to execute this reload command from the server itself. I m executing it from a remote m/c. and have mapped the application with a domain name virtually.
Is it the case with Tomcat on Linux with Apache. Or is something going wrong on my part.
Can someone Help out plz.
Regards,
Rupali

or you can "touch" your web.xml file.
touch web.xmlor that command is for *nix systems, not sure what the Windows command is. But basically, when you edit the web.xml, even if it means updating the last modified time, it will restart only your application and you should see the changes.

NetBeans 5.0 and Tomcat 4.1

Hello,
I'm using NetBeans 5.0 and I have been using the Bundled Tomcat version 5.5.9 for my servlet container and everything's been great. Now that I'm ready to push my application up to a web host, I found that my host (lunarpages) runs with Tomcat 4.1 which uses version 2.3 of the servlet container. Tomcat 5.5 uses servlet container 2.4.
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I tried to fake NetBeans out by selecting the 'Tomcat 5' server and pointing to my Tomcat 4.1 directory but I'm getting the following message when I try to run:
FAIL - Unknown command /deploy
C:\workspace\myApp\nbproject\build-impl.xml:425: Deployment error:
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Thanks,
Eric

I found that my host (lunarpages) runs with Tomcat 4.1 which uses version 2.3 of the servlet containerPlease read the post before answering, the reasoning is crystal clear.
I don't have a concrete answer to this problem, but I do have a suggestion.
1) You can add your own tomcat server to netbeans. Under the runtime tab you will find servers, if you right click this you can add a server. Use this to manually configure your own server
2) as for the servlet spec problem, when creating a web project setting the java EE version to 1.3 might solve the problem... I can't tell this for sure because I've never done it.

How to install Java and Tomcat on my VPS

Hello,
I am new in Java.
I would like to install Java and Tomcat on my VPS server.
Do you know which doc or info i should read?
Thanks a lot.
Gil

The free Perian will do it for you automatically.
Additional free new machine setup stuff:
Install and update your Flash here
http://get.adobe.com/flashplayer/
Install Perian (addiitonal Quicktime codecs)
http://perian.org/
Install the Unarchiver (uncompress software)
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Flip for Mac (for Windows media in Quicktime)
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VLC (plays anything just about)
http://www.videolan.org/
Easy Find (finds everything on a Mac)
http://www.devon-technologies.com/download/index.html
OnyX (maintenance, cleanup, repair utility)
http://www.titanium.free.fr/

Flex mobile project standalone flex server resets to J2EE and can not change

Developing an Android mobile project with FB 4.5. Set original project-->properties-->flex server to standalone with coldfusion as server. After setting web root, Root URL and Coldfusion root folder app works fine with CF. Sometime during development, flex server gets set to J2EE and CF access halts. Go back into project-->properties-->flex server and reset server to 'standalone' with original settings. click Apply or OK and assume that it is reset but it does not. Go back into flex server settings and it is still J2EE. I have seen this issue before and can not resolve it or find any other threads where there is a resolution to this. My only way to continue is to start a new mobile project, import the files and continue. This is not an acceptable way to design any mobile project!! HELP!!

Developing an Android mobile project with FB 4.5. Set original project-->properties-->flex server to standalone with coldfusion as server. After setting web root, Root URL and Coldfusion root folder app works fine with CF. Sometime during development, flex server gets set to J2EE and CF access halts. Go back into project-->properties-->flex server and reset server to 'standalone' with original settings. click Apply or OK and assume that it is reset but it does not. Go back into flex server settings and it is still J2EE. I have seen this issue before and can not resolve it or find any other threads where there is a resolution to this. My only way to continue is to start a new mobile project, import the files and continue. This is not an acceptable way to design any mobile project!! HELP!!

Preinstalled apache, apache2 and tomcat

Hello,
I'm setting up a Sun Fire V490 running solaris 10 for use as a web server. I need to have Apache httpd version 2 and tomcat version 4.x to run.
So I found that the machine comes with apache httpd 2 preinstalled and also apache httpd 1 with fully integrated tomcat engine.
But as stated I need to have apache httpd 2 with tomcat running!
Apart from configuring the system to run httpd version 2 instead of version 1 by use of svcadm, I'm wondering how to get a solid solution to also have tomcat running. Ok I could simply install a tomcat version from apache.org, but I would like to ensure that this is the right solution for e.g. future upgrades.
So if anybody has got some more knowledge but this issue, I would be happy about letting me know!
Thanks, Raimund

Hey, I came into the same question while configuring tomact on Sun server.
So, what did you finally do...........?
any help will be great....
Thanks,

Setting up eclipse and tomcat

Does anyone here have any expertise configuring these two products?(eclipse and tomcat)
I have my tomcat server running and it process them jsp pages just fine. I have also installed the plugin to get tomcat configured with eclispe.
I am just having problems running a jsp file directly from tomcat. it always points to a file on the hd and not to the webapps area like it's supposed to......

Sure - we use that combo for development all the time.
What's the problem specifically? Did you create a new Tomcat project in Eclipse? If you did, then it will automatically add the project's web path as a context to Tomcat, and you can browse directly to it using your browser.
FYI - note that the context that is created is going to point to the eclipse workspace directory - NOT the default webapps directory that you might have configured for Tomcat. That's OK.
- K

J2EE and Tomcat

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