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I am using windows 7.
I have written a simple Spring3 Hello World using Eclipse and successfully run it using tomcat on my computer.
Now I have a Server which runs Linux.
I would like to run the project that I just wrote on my server. It has no GUI or anything of the kind so I can't simply start up eclipse and write the same project on the server.
How do I go about doing that? I am completely new to the whole java and Spring thing, and have absolutely no clue as to how to run my project on the server and be able to view it.
I have searched everywhere online trying to figure out how to put my project on the Server, but it seems like Spring isn't the most noob friendly, especially with its documentation. There doesn't seem to be any explanation on how to take your code from one computer and put it into another and make it work.
There doesn't seem to be any explanation on how to take your code from one computer and put it into another and make it work.
That's right, as it is not often considered "not a programmers job". Its not very related to the framework you're using (Java EE or Spring or whatsoever), instead it's more of an infrastructure thing (related to the operating system and application server that are being used). Nevertheless, it can be very useful to know how the process works.
Generally speaking there are two steps:
Packaging - If you use Maven, you simply run the mvn package command. Or using Eclipse, you can export your project as an WAR-file (Right-click your project, click Export, search for "WAR"). I would advice to use Maven, but that's a bit outside the scope of your question probably. Either way, this step will result in a WAR file.
Deployment - This is a bit harder. The WAR file from step 1 needs to be copied to the Linux server where the application must be ran, and then copied into a special directory where the application server looks for apps. If you're using Tomcat on the Linux machine as well, look for the Tomcat installation directory and find the 'webapps' subdirectory. Other application servers have other procedures / locations, though.
This is under the assumption that Tomcat was already set up for you on the Linux server, and that is running.
This has nothing to do with Spring and everything to do with packaging your application and deploying it in a Servlet container/HTTP server.
Setup Apache and Tomcat (or some other servlet container) on your linux server.
Package your Spring application as a war file (either with maven, ant, Eclipse, or some other build tool).
Drop the war file in the /webapps directory of your Tomcat installation.
Start Tomcat.
Well first you need to get tomcat 'http://tomcat.apache.org/download-70.cgi', and set it up on the linux server you are trying to deploy to.
Then you would export your project as a .war archive in eclipse (File -> Export -> war)
Copy the war file to your server, and copy it into TOMCAT_HOME/webapps
Start up tomcat and you should be able to access the application under localhost:8080/{APPNAME}, so if your war name is myapp.war the url will be localhost:8080/myapp
good luck!
Spring is just a 3rd party open source API. You can do without Spring and still be able to "run" your application on a server.
By "run", this means that your project must be placed in a directory in the server's filesystem, most of the time in the form of a WAR file.
I said most of the time, because if done correctly, you can actually put your project directory inside the server, and it will run without transferring it as a WAR file.
A WAR file is just an archive that has a standard directory structure so that it is readable and executable by the server.
Read the following link on how to package your project as a WAR:
http://help.eclipse.org/juno/index.jsp?topic=%2Forg.eclipse.wst.webtools.doc.user%2Ftopics%2Fcwwarovr.html
And then just copy the WAR file to the TOMCAT_HOME/webapps folder.
Packaging
cd c:/my_project_directory/Web/
jar cvf web-archive-test.war .
Deployment
cd c:/my_project_directory/Web/
scp *.war
your_username#remote_linux_host:/some/remote_directory_where_tomcat_is_installed/webapps/
Related
I am unable to find another article that solves my problem but am happy to hear about one if you know the answer.
I have a RESTful service built in Java with Eclipse. It uses Spring and all of its bells and whistles.
After much work with configuration files, I am able to build the service into a war file, deploy it to my Tomcat webapps folder, and run it from standalone Tomcat. However, it still throws several errors on start when I try to start it from a service defined within Eclipse. The errors are the same errors that I was seeing before I got the config files correct for standalone Tomcat. The errors are about the inability to create the required beans because of references to properties that can't be found.
How did I get it running in Tomcat? I added a couple of .properties files to define properties needed by the beans that get launched at startup and then added a 'set CLASSPATH=...' line to the setenv.bat file in the Tomcat bin folder. This new line adds the properties files into the CLASSPATH. That seems to have fixed everything from standalone Tomcat.
So, my question is, "How do I make these same changes inside my Eclipse server?" I have added the properties folder with the property files under the config folder in Eclipse, just like it is in my native Tomcat folders, but I do not know how to modify the CLASSPATH string to specifically point to my .properties files (as I have done in the setenv.bat file for standalone Tomcat).
I think I understand the problem, but have no idea about the solution.
Thanks for listening.
Dave
Eclipse does not use any *.sh/*.bat files to startup Tomcat. In order to modify the way the server is started you have to open the configuration UI of the server by double-clicking on the server in the Servers view.
From there you will be able to modify the classpath of the system classloader through "Open launch configuration".
Another important setting is "Server path" which tells Eclipse, the value of $CATALINA_BASE. You can modify it only after removing all modules and cleaning the server. It is useful to set it to an easily accessible directory: this way you can verify directly that Eclipse didn't mess up your application deployment (sometimes it "forgets" to copy some libraries).
The "Configuration path" setting tells Eclipse where to find the files (but not subdirectories) that will be copied into $CATALINA_BASE/conf.
Remark: if your application requires you to add libraries to the top classloader, there is probably a problem in your project. The "missing" libraries should be added to WEB-INF/lib of your application instead: look into the "Deployment assembly" of your Eclipse project configuration.
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I just got an application from our client for reference. It looks like a java application however not sure, since i am .Net developer. Here is the structure of the application:
app
components
data
framework
libs
META-INF
plugin
resources
storeserv
WEB-INF
and then some html ,javascript files at the root.
I just want to run this application on the browser for now.
Can anyone please confirm if this is java application? If yes, please let me know how to launch the same on the browser (I am not sure if this is published or the code itself). I could not find any class, jar files anywhere in this app.
Thanks in advance.
The given project is a WEB-application for Java.
To run it you need a Web Application container (like Tomcat or Jetty) and deploy it to this Web Application container. Then you can browse the application.
Yes it looks like a Java web application.
To run it : Install Apache Tomcat. Note the installation port in your installation.
Inside the META-INF folder (of your client files) you will probably find a context.xml file. Open it in a text editor and note the path. It will be something like <context path="/appname">
Then place all the files in $CATALINA_HOME/webapps/appname , where $CATALINA_HOME stands for the installation directory of the Tomcat Server.
Then restart your server(this might not even be necessary).
Access the application at URL: http://localhost:port/appname
Enjoy
In order to be executed, a web application must be deployed on a servlet container(Tomcat, Jetty etc.). This is true even during development. I will describe using Tomcat 6 to provide the execution environment. A web application can be deployed in Tomcat by one of the following approaches:
Copy unpacked directory hierarchy into a subdirectory in directory
$CATALINA_BASE/webapps/. Tomcat will assign a context path to your
application based on the subdirectory name you choose. We will use
this technique in the build.xml file that we construct, because it is
the quickest and easiest approach during development. Be sure to
restart Tomcat after installing or updating your application.
Copy the web application archive file into directory
$CATALINA_BASE/webapps/. When Tomcat is started, it will
automatically expand the web application archive file into its
unpacked form, and execute the application that way. This approach
would typically be used to install an additional application,
provided by a third party vendor or by your internal development
staff, into an existing Tomcat installation. NOTE - If you use this
approach, and wish to update your application later, you must both
replace the web application archive file AND delete the expanded
directory that Tomcat created, and then restart Tomcat, in order to
reflect your changes.
The description below uses the variable name $CATALINA_BASE to refer
the base directory against which most relative paths are resolved. If
you have not configured Tomcat 6 for multiple instances by setting a
CATALINA_BASE directory, then $CATALINA_BASE will be set to the value
of $CATALINA_HOME, the directory into which you have installed Tomcat.
You can visit this youtube link for video tutorial.
this might be a tall order or it might be ridiculously simple. I wanted to run this game on my website: https://github.com/ajanata/PretendYoureXyzzy
Unfortunately I have no clue how to make something like this work. There didn't seem to be an installation file, so I can only imagine it's painfully obvious to anyone familiar with this sort of thing. I recently ordered a trial of a shared Tomcat server, since I'm assuming that's needed to run all the Java goodies.
If there are any simple instructions I should follow to install this, it would be much appreciated if you could share them!
You need to download the source from the Github link you provided and then download Eclipse - Java EE. You then open Eclipse and choose File->Import->General->Existing Projects Into Workspace and choose the folder you just downloaded. You can then choose Export->Web->WAR file and export the WAR file.
You then download and setup Tomcat as described here (ignore the parts after Tomcat is running and you can access it at http://localhost:8080) and install the WAR as described here.
If you are feeling exceptionally lazy I have built the war here. You just need to drop it into the webapps folder in your Tomcat installation and then restart your server. You can then access it at:
http://localhost:8080/cah.
Hard to say without looking deeper into the project, if they create a .war file somehow, just copy the .war file into [tomcat home]/webapps directory and your application will be deployed. You can then acces it at yourmachine:8080/warname
where warname == the name of the war file without the .war extension.
There appears to be a SQL script with the project as well, not sure if there is some database you might need to setup which could get tricky.
I come from an Asp.Net development background and am very comfortable there. I was asked to support an existing Java Web Application w/ struts and am able to figure most of it out with my Asp.Net knowledge and my android development experience. However, I'm having a really simple but stupid problem.
All i have is the website as it exists on the server, no source project to work from. The folder on the server contains both .java and .class files, but the folder doesn't just import into netbeans as a recognized project.
What's the easiest way to get the site imported into some sort of IDE (I can work w/ eclipse too if netbeans isn't recommended), and get it to compile so I can deploy some updates.
It will not be easy to answer fully to your question here. But we should be able to achieve that by steps :)
Here i will speak for eclipse. But it is only because i'm not familiar with netbeans.
First of all create a clean "dynamic web project" under eclipse (using a J2EE enabled eclipse http://www.eclipse.org/downloads/).
Then :
copy your sources files in "Java Resources"
copy the rest of your application (without the class files) in WebContent
In order to test your application localy you will need a local server. Tomcat can be integrated easily in eclipse.
Usually you shouldn't have to (re)construct a project from a deployed web-app; the project should have been kept in version control. Source code isn't usually deployed to the server, either, but if it's been done in this case, you're in luck.
I would just make a new web project in NetBeans and manually move the .java files into it, along with the other resources (except for the .class files).
If you can use eclipse, and the source files are already in the war file as you say. You can import the war file directly into eclipse as project.
file -> import -> war file or existing project into workspce or filesystem (Several other options exists)
I earlier got to create a simple RESTful webservice on my localhost using Eclipse IDE, Tomcat, and JAX-RS libraries.
I am now trying to move the same on to a different unix server which has Tomcat installed. I am not knowing how to get started as in what is equivalent to creating a "Dynamic Web Project" that I do in Eclipse. Do I need to just create a directory myself with all the sub-directories as created by Eclipse? Should this directory be placed in webapps folder in Tomcat container. Should META-INF and WEB-INF also be created by myself?
Where should I put my Java classes?
Can somebody please clarify this or direct me to any documentation about the same.
You need to package your application in a WAR file.
The Sun Java EE 6 Tutorial has a chapter deciated to packaging.
It's pretty easy to export a web application as a war in Eclipse.
Dynamic Web Project (right click) => Export => Web =>war file =>war export dialog
Creation of web application archive - WAR is the solution for your problem,
but take care about all libraries that you need there.
You can easily extract (unzip) WAR file content
and check your project structure and libraries needed
and they will be in WAR's WEB-INF/lib.
Make sure that both Tomcats are set same way,
make sure your code is all OS friendly (users, file paths, permissions)
Always write some test simple code that will run up on app start,
and check all dependencies and libs, system clock, outside world network communication, so you can trace it in web app console or logger easily.
regards