Home > On Startup > Tomcat Load-on-startup

Tomcat Load-on-startup

Contents

Only one of the servlets requires to run this initial code. share|improve this answer answered Apr 24 '09 at 13:40 Steve K 14.8k43846 This is probably an effective solution, but right now I just need something as simple as possible, Is it possible to set a composite NOT NULL constraint in PostgreSQL Are the guns on a fighter jet fixed or can they be aimed? I'm a Software Engineer by Profession, Blogger by Passion & Founder of Crunchify LLC, the largest free blogging & technical resource site for Beginners. this contact form

Also found so many other related questions on net. Other options are listed here- blog.eisele.net/2010/12/… –mikato Jun 18 '14 at 15:25 @skaffman but during the tomcat server in eclipse starts contextInitialized() function is calling but MyClass.INSTANCE is not more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Keep up to date! page

Tomcat Load-on-startup

You can use it like this: override def init(context: ServletContext) { val comments = CommentsRepository(mongoColl) // mount the api + swagger docs mountServlet(context, new CommentsApi(comments), "/api/*", 1) mountServlet(context, new CommentsApiDoc(), "/api-docs/*", Then set up your web.xml to specify your class as a listener. But here the requirement is that as soon as the server starts, I need the LoadOnStartup Servlet's init() method to execute without waiting for any client request. What does Joker “with TM” mean in the Deck of Many Things?

Let's try to understand it by the example given below: web.xml .... //=====================servlet 1============== servlet1 com.javatpoint.FirstServlet 0 //value given 0(zero) //=====================servlet 2============== servlet2 com.javatpoint.SecondServlet 1 //value given asked 2 years ago viewed 665 times active 2 years ago Related 2How can I send a file to the browser using Scalatra?3Tomcat - Servlet init() called twice upon startup3Scalatra Servlet asked 6 years ago viewed 16309 times active 5 months ago Linked 773 How do servlets work? How To Run Java Program In Tomcat init() method is invoked when the servlet instance is loaded so it is a good place for expensive operations.

i.e. This will be invoked after all the servlets and filters have been destroyed. Why do the physical properties of an egg shell change when the egg shell is exposed to vinegar for a week? http://stackoverflow.com/questions/3289737/load-on-startup-tomcat Bill Jaggi Kunal Ranch Hand Posts: 45 posted 13 years ago Hi William, Quite amazingly, even if I put the servlet in a package as shown below, package practice; import

how to stop muting nearby strings or will my fingers reshape after some practice? Servlet Load On Startup Not Working share|improve this answer answered Jun 1 '11 at 20:08 Cratylus 28.1k35138253 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign Is it bad practice to use GET method as login username/password for administrators? web.xml file contain tags  and  tag.

How To Run Java Program Automatically On Tomcat Startup

The important part is r.setLoadOnStartup(loadOnStartup). my site init() method is invoked when the servlet instance is loaded so it is a good place for expensive operations. Tomcat Load-on-startup Instantiation, sessions, shared variables and multithreading 3 Instantiate object when Tomcat starts 5 Starting the servlet when the application startup Related 1“Servlet is currently unavailable” error on Tomcat5How to set the Load On Startup Servlet Example I want to load a Servlet on Startup, i-e when the servlet container starts.

The fact that it doesn't points to a deeper problem, then. http://supportcanonprinter.com/on-startup/windows-7-mute-on-startup.html Is it possible to initialize this class on application startup, then access its methods as pages are being served up? Browse other questions tagged tomcat scalatra or ask your own question. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Tomcat Run Class On Startup

Otherwise, you can do what the other answer says and put it in the init() method of the servlet. Detailed Example Attached WordPress, Yoast SEO and Google Sitelinks Searchbox How to Add HTML Title Attribute to All WordPress Images Automatically For Mouse Hover Tooltip? You can specify the listener in the web.xml. com.deadcoderising.ExampleContextListener Or you can use the @WebListener annotation. http://supportcanonprinter.com/on-startup/4-beeps-on-startup-hp.html The 0 value will be loaded first then 1, 2, 3 and so on.

Join them; it only takes a minute: Sign up Tomcat Java Servlet - Initialize Class on Application Startup up vote 7 down vote favorite 3 I have a class that takes Servlet Load On Startup Annotation How to prove that gcd(m+1, n+1) divides (mn-1) How to tell my parents I want to marry my girlfriend Anagram puzzle whose solution is guaranteed to make you laugh What is What does the expression 'seven for seven thirty ' mean?

This servlet is deployed on Tomcat and Windows Server.

  • Does every data type just boil down to nodes with pointers?
  • Thank you Simon java share|improve this question asked Jun 11 '13 at 10:48 Simon Reeves 103418 migrated from programmers.stackexchange.com Jun 11 '13 at 18:55 This question came from our site for
  • Now, you can go go to tomcat/apache-tomcat-7.0.41/bin and execute ./startup.sh.
  • Instantiation, sessions, shared variables and multithreading1248How to avoid Java code in JSP files?1Where should I place clean up code inside a web application?591Can't start Eclipse - Java was started but returned
  • But with the addition of context listeners, this is no longer necessary. –skaffman Oct 1 '08 at 20:56 That's good tp know - a legacy application we're "refactoring" (it's
  • But, servlet1 will be loaded first then servlet2.
  • Which was the last major war in which horse mounted cavalry actually participated in active fighting?
  • Then set up your web.xml to specify your class as a listener.

share|improve this answer edited Apr 25 '16 at 9:21 answered Apr 25 '16 at 9:13 Jaimin Patel 6742918 add a comment| Your Answer draft saved draft discarded Sign up or Use ServletContext#setAttribute to store created object for future use. Exactly what I need. "" –Stefan Beike Oct 16 '14 at 14:15 add a comment| up vote 8 down vote If you want it to happen once for the whole app, How To Run Java Program In Apache Tomcat Server I have a startup servlet that I use to initialize a lot of objects and put in the servlet context.

You need to reference the servlet through a proper alias. How to make use of Devel debugging functions on large or complex objects How do you express any radical root of a number? Cost effective drivetrain maintanance How to bevel only one end of a cylinder? his comment is here contextDestroyed - Is triggered when the ServletContext is about to be destroyed.

If you want to wait for these threads to finish, then start them and use Thread.join to wait until their completion so that you don't start accepting requests until they finish. How to explain extreme human dimorphism? Hot Network Questions Why do shampoo ingredient labels feature the the term "Aqua"? or should a separate web app be the solution? –Simon Reeves Jun 12 '13 at 6:15 @SimonReeves No, I suppose if you used load-on-startup, then the work could begin

In init method we can define our scripts which have to be executed e.g. Jaggi Kunal Ranch Hand Posts: 45 posted 13 years ago Hi Phil, I have tried your code snippet too. Electrical Propulsion Thrust Should we eliminate local variables if we can? Any ideas?

Here is a way to do this programmatically using a LifeCycle: def mountServlet(sc: ServletContext, servlet: HttpServlet, urlPattern: String, loadOnStartup: Int = 1) { val name = servlet.getClass.getName val reg = Option(sc.getServletRegistration(name))