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!!! Servlet Frequently Asked Questions !!!

Details about load on startup (load-on-startup tag) in Servlet ?

SCWCD 1.5 Exam Kit

!!!Answer!!!- From Technical Expert

Used to decide whether servlet will be " lazily " or " eagerly " loaded
Specified in web.xml file

If the value is not specified or is a Number < 0 then it means " lazy loading "

What " lazy loading " means is that servlet is NOT loaded by container on startup

Servlet in this case is loaded on the first client request - so the first client can experience poor performance

" Eager " loading means that the servlet is initialised on container startup

If there are two servelts A & B with values 0 & 1 than it means that Servlet A ( having value = 0 ) will be loaded first

So if there are more than one servlet this element specifies the order of loading - lower integer values ( including zero ) are loaded first

If you specify this element but do not provide the value - even then the servlet will be the first servlet that gets loaded

To ensure that servlet follows " lazy loading " - do not provide this entry at all in web.xml file OR provide a negative number

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Answer : <servlet>
<servlet-name>TestServlet</servlet-name>
<servlet-class>TestServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>

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