{"id":376,"date":"2003-05-06T00:01:38","date_gmt":"2003-05-06T04:01:38","guid":{"rendered":"http:\/\/wordpress.cephas.net\/?p=376"},"modified":"2003-05-06T00:01:38","modified_gmt":"2003-05-06T04:01:38","slug":"application-settings-when-using-servlets","status":"publish","type":"post","link":"https:\/\/cephas.net\/blog\/2003\/05\/06\/application-settings-when-using-servlets\/","title":{"rendered":"Application settings when using servlets"},"content":{"rendered":"

I posted some notes<\/a> a couple weeks ago about .NET configuration files, came across the code for doing the same thing in a servlet container tonight. Basically, you get a ServletConfig object using the getServletConfig() method of the Servlet interface and then call getInitParameter(String initParamName) on that. For example, let’s say that I put a global database connection string in my web.xml deployment descriptor:<\/p>\n

<web-app>
\n  <servlet>
\n   <servlet-name>myservlet<\/servlet-name>
\n   <servlet-class>MyServlet<\/servlet-class>
\n    <init-param>
\n     <param-name>connection_string<\/param-name>
\n     <param-value>user id=sa;password=mypassword;initial catalog=mydb;data source=mydbserver;Connect Timeout=30<\/param-value>
\n    <\/init-param>
\n  <\/servlet>
\n<\/web-app><\/p>\n

Then, in my servlet code init() method, I could write this:<\/p>\n

ServletConfig sc = getServletConfig();
\nString connection_string = sc.getInitParameter(“connection_string”);<\/p>\n

After retrieving the value from the ServletConfig object, you’ll probably want to store it for later use in the ServletContext object:<\/p>\n

ServletContext c = getServletContext();
\nc.setAttribute(“connection_string”, connection_string);<\/p>\n

Now I can get the connection string in a JSP or a servlet later using this short snippet:<\/p>\n

String myCS = (String)getServletContext().getAttribute(“connection_string”);<\/p>\n","protected":false},"excerpt":{"rendered":"

I posted some notes a couple weeks ago about .NET configuration files, came across the code for doing the same thing in a servlet container tonight. Basically, you get a ServletConfig object using the getServletConfig() method of the Servlet interface and then call getInitParameter(String initParamName) on that. For example, let’s say that I put a … Continue reading Application settings when using servlets<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[],"_links":{"self":[{"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/posts\/376"}],"collection":[{"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/comments?post=376"}],"version-history":[{"count":0,"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/posts\/376\/revisions"}],"wp:attachment":[{"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/media?parent=376"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/categories?post=376"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cephas.net\/blog\/wp-json\/wp\/v2\/tags?post=376"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}