How to set global variable in Tomcat 5.5.17
Hi, I setup Tomcat 5.5.17 in Linux Fedora Core 4 and develop a Web Application under /webapps directory. I have so many configuration files that need to be loaded into my web application. These configuration files are in a self-defined format and I wrote some Java classes to parse these configuration files and save the parsing result in a linked list (java.util.List or java.util.Map). These configuration files are static (not change). In my web application, when a user session created, I call these Java classes to parse these configuration files and save the linked lists into the session. So, every user sessions contain the same set of linked list and, as a result, it reads these files every time when session created (so many I/O access, if many session created as the same time, it will slow down the server). Now, I want to save these linked lists as a global variables in Tomcat so that each JSP and Servlet can access these global variables and reduce I/O access and memory usage. So, would you please tell me how to set global variables in Tomcat and initialize them using the Java classes that I wrote. Thanks -- Kathy Lo - 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: How to set global variable in Tomcat 5.5.17
Instead of attaching information to a session context you can attach information to an application context, whats more, instead of loading the config each time a session is created, you can create what is called a Lifecycle listener which will load the configuraiton file once, when the application is loaded into the web server! Look up lifecycle listener in google. I can send sample code if you need it. Best Regards, Jacob Kathy Lo wrote: Hi, I setup Tomcat 5.5.17 in Linux Fedora Core 4 and develop a Web Application under /webapps directory. I have so many configuration files that need to be loaded into my web application. These configuration files are in a self-defined format and I wrote some Java classes to parse these configuration files and save the parsing result in a linked list (java.util.List or java.util.Map). These configuration files are static (not change). In my web application, when a user session created, I call these Java classes to parse these configuration files and save the linked lists into the session. So, every user sessions contain the same set of linked list and, as a result, it reads these files every time when session created (so many I/O access, if many session created as the same time, it will slow down the server). Now, I want to save these linked lists as a global variables in Tomcat so that each JSP and Servlet can access these global variables and reduce I/O access and memory usage. So, would you please tell me how to set global variables in Tomcat and initialize them using the Java classes that I wrote. Thanks -- __ Jacob Rhoden - http://www.jacobrhoden.com/ - 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: How to set global variable in Tomcat 5.5.17
Kathy Lo: I think you can use the interface javax.servlet.ServletContextListener.In you implementation's method contextInitialized(ServletContextEventfile:///E:/java/api/j2eeri-1_4-doc-api/apidocs/javax/servlet/ServletContextEvent.html sce),you can parse these configuration files and save the parsing result in the application scope,for example: sce.getServletContext().setAttribute(linkedlist,linkedlist); then when you want to the linkedlist,you can get the ServletContext,and call its getAttribute(). 2007/3/7, Kathy Lo [EMAIL PROTECTED]: Hi, I setup Tomcat 5.5.17 in Linux Fedora Core 4 and develop a Web Application under /webapps directory. I have so many configuration files that need to be loaded into my web application. These configuration files are in a self-defined format and I wrote some Java classes to parse these configuration files and save the parsing result in a linked list (java.util.List or java.util.Map). These configuration files are static (not change). In my web application, when a user session created, I call these Java classes to parse these configuration files and save the linked lists into the session. So, every user sessions contain the same set of linked list and, as a result, it reads these files every time when session created (so many I/O access, if many session created as the same time, it will slow down the server). Now, I want to save these linked lists as a global variables in Tomcat so that each JSP and Servlet can access these global variables and reduce I/O access and memory usage. So, would you please tell me how to set global variables in Tomcat and initialize them using the Java classes that I wrote. Thanks -- Kathy Lo - To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
