exception in doAfterBody

[Hendy Setyo Mulyo]

Hi ranchers,

Let's say there is an exception occured in doAfterBody of IterationTag implementation and it doesnt try-catched, would the doEndTag still be called by the container?
Thanks.

[Dagbj�rn Nogva]

Hello Hendy,

I believe the short answer is no.

The following is copied from the javadoc of the TryCatchFinally interface, an auxiliary interface that a Tag, an IterationTag or a BodyTag can implement. doAfterBody should be called somewhere between doStartTag and doEndTag, so any exceptions here will cause doEndTag to be skipped.

 h = get a Tag();  // get a tag handler, perhaps from pool
 
 h.setPageContext(pc);  // initialize as desired
 h.setParent(null);
 h.setFoo("foo");
 
 // tag invocation protocol; see Tag.java
 try {
   doStartTag()...
   ....
   doEndTag()...
 } catch (Throwable t) {
   // react to exceptional condition
   h.doCatch(t);
 } finally {
   // restore data invariants and release per-invocation resources
   h.doFinally();
 }
 
 ... other invocations perhaps with some new setters
 ...
 h.release();  // release long-term resources

This is also supported by the JSP 2.0 spec, page 2-52, The Tag Interface.

If an exception is encountered during the evaluation of the body of a tag, its doEndTag method will not be evaluated. See the TryCatchFinally tag for methods that are guaranteed to be evaluated.

HTH,
Dagbj�rn

[Hendy Setyo Mulyo]

Thanks, Dagbj�rn