15.7.1 Trace Get Point and the PRF Trace Get Level

The following table describes the event IDs, trace collection points, and PRF trace collection levels.

Table 15‒10: Details of trace collection points in a Web container (trace of request processing)
Event ID	No. in the figure^#1	Trace acquisition points		Level
0x8200^#2	1	Immediately after a request is acquired, or when the request header analysis is complete	Via the Web server	A
0x8201	1		Via the simple Web server	A
0x8202^#3	3	Immediately before a servlet or JSP is invoked		A
0x8203	2	Immediately before the filter that is executed before the execution of the servlet or JSP that receives the request is invoked (when the `<dispatcher>` tag of the `<filter-mapping>` tag of `web.xml` is omitted, or when a filter for which `REQUEST` is specified in the `<dispatcher>` tag is invoked)		B
0x8206	4	Immediately before a servlet or JSP is invoked via RequestDispatcher		B
0x8207	3	When the static contents are invoked		B
0x8300	8	When request processing is complete	Via the Web server	A
0x8301	8	When request processing is complete	Via the simple Web server	A
0x8302	6	Immediately after the processing of the servlet or JSP is complete		A
0x8303	7	Immediately after the completion of processing of the filter that is executed before the execution of the servlet or JSP that receives the request (when the processing of the filter for which `REQUEST` is specified in the `<dispatcher>` tag of the `<filter-mapping>` tag of `web.xml` is complete)		B
0x8306	5	Immediately after the processing of the servlet or JSP via RequestDispatcher is complete		B
0x8307	6	Immediately after the completion of processing of static contents (DefaultServlet)		B

Legend:

A: Standard

B: Advanced

#1

Corresponds to the numbers in Figure 15-7.

#2

For a POST request, if the POST data does not arrive from the client, the request processing might be delayed in this interval.

#3

If a JSP compilation is required, the trace is collected after the JSP compilation is executed.

The following figure shows the trace collection points in a Web container.

Figure 15‒7: Trace collection points of a Web container (trace of request processing)