Re: broker start up in Tomcat
Thank you Len for the suggested approach . The web apps should be abstracted from the procedure of starting the broker, otherwise I'll end up adding a servlet context listener for every new web app added to our application. If possible, Iam looking for a way , in which Tomcat would start the broker without any involvement from web applications. On 7/26/07, Len Popp [EMAIL PROTECTED] wrote: Write a function in your shared lib that checks if Active MQ has been started yet, and starts it if not. Then, in each webapp add a ServletContextListener with a contextInitialized method that calls the aforementioned function. Thus, Active MQ will be initialized when the first webapp starts up, whichever it is. -- Len On 7/26/07, suchitha koneru [EMAIL PROTECTED] wrote: Hello Tomcat Users, I am using Tomcat server 5.5.20 along with Java 1.6, and Active MQ 4.1.1. There are two web applications A and B which communicate via the active mq broker. Our application has a requirement of starting the broker before any of the web apps. Where should I be placing the code which starts the broker. I can create a jar file out of the code and dependent libraries and place it in common/lib. How will I communicate to Tomcat server that the broker has to be started during the server start up process, before any of the web apps ? Any pointers in this regard ? thank you , Suchitha. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: broker start up in Tomcat
I dont know ActiveMQ but I think you will have to allow any WebApp that needs it, to start it, if its not already running I think you have 2 options, create a custom JNDI object or create a singleton start up object in common/lib, here is an article http://www.javacoffeebreak.com/articles/designpatterns/index.html Just remember that the lib is now shared and I imagine you call into this broker to send messages, if so remember to make it thread safe, it possibly is already. I am curious about what you using it for... I have still to find application for JMS in the TC environment, because sending a message to a servlet from an embedded http client has always served me well... its on port 80, so no firewall problems etc. I guess its because you have message beans in an application server somewhere just wondering. - Original Message - From: suchitha koneru [EMAIL PROTECTED] To: users@tomcat.apache.org Sent: Friday, July 27, 2007 12:48 AM Subject: broker start up in Tomcat Hello Tomcat Users, I am using Tomcat server 5.5.20 along with Java 1.6, and Active MQ 4.1.1. There are two web applications A and B which communicate via the active mq broker. Our application has a requirement of starting the broker before any of the web apps. Where should I be placing the code which starts the broker. I can create a jar file out of the code and dependent libraries and place it in common/lib. How will I communicate to Tomcat server that the broker has to be started during the server start up process, before any of the web apps ? Any pointers in this regard ? thank you , Suchitha. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: broker start up in Tomcat
Thank you so much Johnny for the idea. We have two web apps A and B namely. A is the front end of our application and B is the back end. Our application is web based, so we have a lot of https requests coming from the browser. We could have used a servlet for inter web app communication , but a servlet is visible to teh outside world. Our Messaging bus implemented using active mq is confined to the JVM and is not accessible to the out side world. The Web app A and Web app B have to keep each other updated and in sycn with respect to the mutual changes .They do it via the JMS Messaging Bus implemented using active MQ. On 7/26/07, Johnny Kewl [EMAIL PROTECTED] wrote: I dont know ActiveMQ but I think you will have to allow any WebApp that needs it, to start it, if its not already running I think you have 2 options, create a custom JNDI object or create a singleton start up object in common/lib, here is an article http://www.javacoffeebreak.com/articles/designpatterns/index.html Just remember that the lib is now shared and I imagine you call into this broker to send messages, if so remember to make it thread safe, it possibly is already. I am curious about what you using it for... I have still to find application for JMS in the TC environment, because sending a message to a servlet from an embedded http client has always served me well... its on port 80, so no firewall problems etc. I guess its because you have message beans in an application server somewhere just wondering. - Original Message - From: suchitha koneru [EMAIL PROTECTED] To: users@tomcat.apache.org Sent: Friday, July 27, 2007 12:48 AM Subject: broker start up in Tomcat Hello Tomcat Users, I am using Tomcat server 5.5.20 along with Java 1.6, and Active MQ 4.1.1. There are two web applications A and B which communicate via the active mq broker. Our application has a requirement of starting the broker before any of the web apps. Where should I be placing the code which starts the broker. I can create a jar file out of the code and dependent libraries and place it in common/lib. How will I communicate to Tomcat server that the broker has to be started during the server start up process, before any of the web apps ? Any pointers in this regard ? thank you , Suchitha. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: broker start up in Tomcat
Write a function in your shared lib that checks if Active MQ has been started yet, and starts it if not. Then, in each webapp add a ServletContextListener with a contextInitialized method that calls the aforementioned function. Thus, Active MQ will be initialized when the first webapp starts up, whichever it is. -- Len On 7/26/07, suchitha koneru [EMAIL PROTECTED] wrote: Hello Tomcat Users, I am using Tomcat server 5.5.20 along with Java 1.6, and Active MQ 4.1.1. There are two web applications A and B which communicate via the active mq broker. Our application has a requirement of starting the broker before any of the web apps. Where should I be placing the code which starts the broker. I can create a jar file out of the code and dependent libraries and place it in common/lib. How will I communicate to Tomcat server that the broker has to be started during the server start up process, before any of the web apps ? Any pointers in this regard ? thank you , Suchitha. - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
