How to deploy my RESTful application to Apache server? - java

I built my java RESTful application in Eclipse with Jersey and a couple other libraries. My question is, how do I deploy this to a Tomcat server? Do I export it as a WAR file? Do I need to deploy the libraries I used as well or are they packaged in the WAR file?
The server is running on an ubuntu machine which I can access over ssh. I got the server running with "apt-get install tomcat7". Which folder should I put it in? Is any configuration needed? What should I do with the web.xml file?
Thanks in advance.

You usually wouldn't use Apache to directly serve a Jersey web application as Apache is not a Java application server. It would be served from a Java server such as Tomcat instead. If you wish to serve your Jersey application as if it was located on your Apache server, you would still have a Tomcat server running and set up a reverse proxy to your Tomcat server. I personally use a server such as Wildfly or TomEE which implements the full JavaEE profile and means you are less likely to run into errors. Nearly all Java application servers also have the capability of serving static content so unless you specifically need Apache features, you do not need to go to the trouble of also running Apache.
With each one of these servers you would need the .WAR file and deploy it, either through the appropriate maven plugin, the web manager or placing the .WAR into the appropriate directory.
Dependencies for a .WAR specified in the 'compile' scope will be included as part of the .WAR file and those in the 'provided' scope will not be included (for when your web server has these included)

Related

Deploy Spark-Java (Gradle, Maven) application to AWS Elastic Beanstalk

I am having trouble connecting to the endpoints of my java application deployed to AWS Elastic Beanstalk. The application handles a number of POST requests and is intended to serve a mobile application, so the server itself does not have any static files. I used the Spark Java framework, which finds the endpoints correctly when I test on Localhost, but not on AWS Elastic Beanstalk.
I can deploy the Exploded war onto EB (running Tomcat Web server), yet all requests that I send return a 404 Error: Resource not Found. Spark java runs on the embedded Jetty server, so to run on Tomcat, I did as suggested in their documentation (http://sparkjava.com/documentation#other-web-server): I have implemented the SparkApplication interface, moving all endpoints from main() to init() and I added the suggested code to the web.xml file.
The .war uploaded contains META-INF with web.xml, lib (with the gradle libraries), and classes (with my compiled output). Again, no static files.
More details:
I use the Elastic Beanstalk IntelliJ (Ultimate) plugin to deploy and at this point I tested that this is no different from deploying a .war directly on the EB dashboard. I have opened to all ports and connections in security settings to discard any connectivity issue. I believe this is just a matter of the servlet not mapping the urls. Any suggestions?
Run it as a war on local box to make sure you have the wiring right. I have done this recently - Spark Java on Beanstalk, but I think I deployed it as a jar. Beanstalk supports just straight java jar (fronts it with nginx). I think when I deployed as a jar, I did have to do something to specify the listening port of 4567 that Spark Java uses by default.
I have run Spark Java as a war in Tomcat as well, but I don't think on AWS - I believe in that case I deployed as a jar.
Solved! I had code inside the main class that was changing the port. While this was necessary to run on the local environment, it conflicted with AWS, which assigns the port automatically.

How to start tomcat server outside netbeans IDE

I have created an application in Java EE, I have learned how to deploy it in the tomcat server using the manager app or by copying the war file to the webapps folder. Now I can start the tomcat server only from the Netbeans IDE.
I want to know how to start the apache tomcat server without using the IDE and run my web application from the war file deployed. If I'm headed in the wrong direction please correct me. I'm asking this to gain knowledge of how to deploy the .war file in another server system without using the IDE only the tomcat server.
The shell scripts located in "CATALINA_HOME/bin" are the most bare-bones way of getting Tomcat up and running. The two scripts capable of starting Tomcat in this directory are named "catalina" and "startup", with extensions that vary by platform.
In your tomcat installation directory, there would be a startup.bat/sh file which will start the server for you. Moreover you can see the conf folder as well if you want to change any configurations. Whatever war you copy to the webapps folder will be automatically deployed

Creating Executable WAR file

I want to deploy my Java EE project to the client desktop (Not, to a domain). How may I able to achieve that without again installing Servlet containers like Tomcat.
I want to make my war file as clickable file, to what ever system I deploy it to.
Hot to achieve it? I mean is there any way to deploy war file + servlet containers as a single file, as the web app can be opened any where without installing Tomcat or GlassFish etc., I use NetBeans IDE.
Check out Excelsior JET: it can compile your war and servlet container into a native executable for a given platform.

What happens behind the scenes of deploying a Spring MVC application to tomcat outside of eclipse?

I guess a drawback of using such an awesome IDE like eclipse is that you miss the point for what happens behind the scenes of an application. I'm a ruby developer so not a java veteran. So I've been coding a project in java and using the spring framework for IOC and MVC. Can someone explain to me what is going on when I select run on server in eclipse? Because eventually I will be deploying this masterpiece of an application to a Linux server. Here is my setup. I am using Spring MVC 3 and the maven plugin in eclipse. In the pom.xml file, I have stuff like latest spring release version, log4j, spring mvc, spring context etc.
I have been testing my application on localhost using the handy option of run on server in the eclipse IDE. The server configuration in eclipse is pointing to the tomcat directory location for where I have installed tomcat 7. Please demystify what happens behind the scenes and what I will need to do if I want to deploy this application on a production server. The more detail the better. Thanks a ton in advance.
Deploying a web application to Tomcat is as simple as this (assuming Tomcat is installed)
Bundle your application in a .war with the correct format.
Move the generated .war file to the /webapps directory of your Tomcat installation folder.
Run the /bin/startup.[sh|bat] script in the Tomcat installation folder.
Note that there are intermediate steps you can do to configure the deployment, like changing your context path. Go through the Tomcat documentation for details.
In step 3, Tomcat will extract the .war contents to a directory in the /webapps folder with the same name as your .war file. It will use this as the context path. The script itself launches a java process by putting the WEB-INF/[class|lib|...] onto the classpath along with some Tomcat libraries.
So Eclipse basically does all the steps above for you.
Ultimately you are deploying an web application that means you are deploying a war file to the server. Regardless of using frameworks like spring, struts anything.
SO a web application request starts from web.xml file. SO for spring mvc application, you are mapping all request coming from browser to DispatcherServlet and then this guy is responsible to manage whole life cycle of your application.
For more details of how MVC works please see
http://docs.spring.io/spring/docs/3.2.x/spring-framework-reference/html/mvc.html
So in order to deploy your application (a war) on server first of all you have to create a war from your source code. You can go to traditional approach to use java given utility like using jar from command prompt or you can use ANT, GRADLE, MAVEN and such build tool that creates war for you in automated way.
Spring is not doing anything extra for you. I believe you to research a bit more on how these tools works.
Once a war is ready for you, you can simply go to tomcat UI and there you will find options to deploy your war.
I hope it helps you.
All the majic happens in two places.
The first is your 'Servers' directory in the root of your Eclipse Package Explorer. These are your server configuration files that Eclipse will use (mostly) when it creates a new server instance.
The second is in the ./metadata/.plugins/org.eclipse.wst.server.core/ file system directory in your Eclipse workspace. This is where the tomcat application is actually deployed by eclipse.
The Tomcat Documentation is pretty good actually and helps explain how to do deployments. FYI, I do not know many people that use the Manager, from my experience most people deploy their applications by hand.

steps for adapt eclipse dynamic web project to have a site in real server

I wrote a small servlet and jsp project on eclipse and tomcat 5.5, but I don't know with works I do for make that a real site on a real host. Should I war them or I should upload project on host? My host should have which properties? I really don't now how to start?
I would recommend packaging them in a war and deploying it out to the remote tomcat server. Its not a good idea to deploy an unpackaged project directly to the server unless your debugging or testing. Once you have a finished project ready to deploy package it to a war. I typically deploy to server using the tomcat manager page. Just browse for the war, click the upload button and it should start right up. On my local machine this is the url that I use to upload to the server http://localhost:8080/manager. The server itself should have the same properties and settings that you are using in your eclipse workspace, and I would highly recommend that it be the same version as well. The war can also be dropped into a directory on the remote host and Tomcat will load this on startup, this location will vary depending on the host.

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