isThreadSafe

Indicates the level of thread safety implemented in the page.

If  

false

  then the JSP container shall dispatch multiple outstanding 

client requests, one at a time, in the order they were received, to the 

page implementation for processing.

If  

true

  then the JSP container may choose to dispatch multiple 

outstanding client requests to the page simultaneously.

Page authors using  

true

  must ensure that they properly 

synchronize access to page shared state.

Default is  

true

 .

Note that even if the 

isThreadSafe

 attribute is  

false

  the JSP page 

author must ensure that access to any shared objects shared in either 

the 

ServletContext

 or the 

HttpSession

 are properly 

synchronized. See Section 2.7.2

info

Defines an arbitrary string that is incorporated into the translated page, 

that can subsequently be obtained from the page's implementation of 

Servlet.getServletInfo()

 method.

isErrorPage

Indicates if the current JSP page is intended to be the URL target of 

another JSP page's 

errorPage

.

If  

true

 , then the implicit script language variable  

exception

is defined and its value is a reference to the offending 

Throwable

from the source JSP page in error.

If  

false

  then the  

exception

  implicit variable is unavailable, 

and any reference to it within the body of the JSP page is illegal and 

shall result in a fatal translation error.

Default is  

false

Chapter 2

Standard Syntax and Semantics

46