I have an enterprise application running on a WebLogic server.
When I modify any Java class, I have to build the .ear file and deploy to the server every time. Even for a small modification, I need to build the whole application and deploy to the server. The server is taking around 10 minutes to do this.
Is there any other way to do this?
When I was working with Tomcat, we used to update the .class files directly in the webapps project folder so that we didn't need to re-build the entire application.
Yes - there is a feature called FastSwap.
Using FastSwap to speed up dev
Using FastSwap Deployment to Minimize Redeployment
When you create a weblogic domain, you define it will be started in Development or Production mode.
To modify that, update the value of production-mode-enabled to true or false in config/config.xml
For more details check the following link or Weblogic documentation.
Difference between DEV and PROD mode in Weblogic 10.3
About your question on Weblogic Plugin, I suppose your're talking about OEPE (Oracle Enterprise Pack for Eclipse), which will deploy your application to a running domain that will be in dev or prod mode according to the mentioned in the config.xml
Related
I have made a small maven based web application in VSCode and trying to deploy it on JBoss using the Redhat Server Connector Extension.
But the hot deployment of the class files does not work in simple running JBoss server.
But Hot deployment does work in debug mode as 'Hot Code Replace' by setting the property 'java.debug.settings.hotCodeReplace' to 'auto'.
My inputs are from below links:
https://devblogs.microsoft.com/visualstudio/hot-code-replacement-for-java-comes-to-visual-studio-code/
and other SO links like:
How do I get Java "hot code replacement" working in JBoss?
Hot deploy on JBoss - how do I make JBoss "see" the change?
But it couldn't help.
Can you suggest something more about how it is simply possible in running JBoss?
(PS: Auto Build feature in VSCode is already enabled.
And It works fine in eclipse).
Hot deployment of web applications in VSCode's integrated RedHat Server connector can occur in following ways:
Exploded war folder: A folder is extracted from the original war and deployed to JBoss using the Exploded option. Here, the static changes like change in jsps and HTML are automatically reflected in the running application.
Hot code Replacement: Hot code replacement (HCR) is a fast debugging technique in which the Java debugger transmits new class files over the debugging channel to another JVM.
HCR only works when the class signature does not change; you cannot remove or add fields to existing classes when using HCR. However, HCR can be used to change the body of a method.
(source: https://devblogs.microsoft.com/visualstudio/hot-code-replacement-for-java-comes-to-visual-studio-code/)
Maven Install/build: It is actually not a preferred technique which someone will want but it is useful also. In this technique, you run maven: install which builds the project again and install it onto the server again.
Currently, VSCode for java and the server connector extension are new as compared to already available IDEs like Eclipse. So, we might expect more powerful functionality in coming future.
I started my journey into web applications about three years ago and I'm happy to say that I've finally deployed a working website. My concern is that to deploy the website I use the Eclipse IDE and a Tomcat webserver. So basically I right click the project in Eclipse and then choose "Run As > Run on Server" and then select the Tomcat server I downloaded - from that point on the console spits out some startup messages and my website is online and ready for use. What are are some of the drawbacks of deploying a project this way. I've read just briefly about WAR files and adding them to Tomcats Webapps folder but I could neither get that working nor did I understand completely the process...so is it acceptable to just deploy the project the way I have been doing thus far by running it in Eclipse?
Generally Development machine and deployment server is different.
On Deployment server one may not have eclipse always.
WAR file is just a webarchive which includes all the necessary files. WAR makes your project portable.
Export WAR from eclipse place it in tomcat webapps in any machine and restart tomcat.
You should have your webapp successfully running on that machine.
That's a fine way for deploying a server when you're learning, or always have the server (the only server!) running on your development machine.
If you need to push to a remote machine, it won't work, and you'll need to learn other methods then, but for now, what you're doing is fine.
i have tomcat project the directory structure is
previously i was using tomcat server, whenever i modified .java files i used to build the project and restarted the server in eclipse through plugin than the changes would have taken effect.
Now in my company they changed from tomcat to weblogic since i am new to it, i used to build war file every time and deploy manually to check the changes.
Can any one tell me how to do hot deployment in web logic. i googled it but it says i need to change project type to dynamic project, that i cant do since it already in development.
is their better way just make changes to java file build and no need to restart the server through eclipse in weblogic 12c.
Eclipse IDE luna
weblogic 12c server
project type : tomcat project structure
I think how you doing that is a little old fashioned. With eclipse luna, tomcat 5.0 - tomcat 8.0 is well supported. And take some effort to turn your project into a 'Dynamic Web Project', in that way you will benifit a lot from the experience of other people.
For hot redeploying, you can try JRebel, it reload your changed java class without reloading the whole applcaition.But it's a commercial software, and I don't know a good and free alternative yet.
I have developed a java webservice application that I have been running on my dev-computer and in the meanwhile been setting up a dedicated ubuntu based linux server.
I have installed oracle-jre, mysql and apache tomcat 7 on this linux server and
after reading documentation I understand that I can either copy the deployed project archive (.WAR) or I can simply copy the project folder, into the servers /webapps/ folder from my development computer. Then restart tomcat7 and it should automatically run the webapp.
On my dev-computer with Eclipse IDE the webservice works properly as expected, but I cannot access the POST URL methods at all on the server
e.g. localhost:8080/Webservice/rest/account/login
(The installation on the server seems to be O.K as the Apache examples all work properly.)
I cannot see any logs in the /logs/ directory, in fact the folder is completely empty, so I cannot debug whats actually happening. Why aren't logs writing to the Catalina.out file?
Am I deploying this correctly as explained above?
Do I need to configure Eclipse or any project settings to reflect the change from the eclipse IDE / dev-computer to the server? E.g Is there any real difference?
A lot of questions there, but I wanted to clarify as much as possible,
Cheers,
Oliver
I fixed this issue by reinstalling tomcat.
Currently, I have tomcat installed on the production server to serve my java webapps. I develop in eclipse at my personal workstation and then I use an ant script to build the project into a war file and deploy that on the server.
This setup works well when I am on the same network as the server because deploying is almost instantaneous. However, now that I am working remotely uploading the war file to the server is slow and in most cases very redundant (there are about .5 GB of static media included in the war file).
Is there a better way to update my webapp on tomcat from eclipse and if so what are the best options for implementing such a solution with minimal effort?
Checkout rsync. It transmits just the updates to the file, so it will greatly speed up your process. Also depending on how complex your application is you might look into installing jetty on your personal workstation. It works well with eclipse and lets you check the new code almost instantaneously.
What it sounds like you want is to have the exploded war file(your root app/result of ant compile) sit in your tomcat web-apps folder. Tomcat will deploy it based on the host or context tag in server.xml.
This way, you can just drop your $app/WEB-INF/classes into the application and, if context reload is enabled, the new files will be deployed immediately.