Locking and controlling requests (service lock) is a function that improves system availability by stopping reception of requests to a specific J2EE application, or by enabling replacement or restart of a J2EE application without stopping the entire system.

The following table shows the structure of this section.

Table 3-5 Structure of this section (locking and controlling requests)

Topic type	Title	Location
Description	Overview of locking and controlling requests	3.7.1
	Replacing a J2EE application while the system is online	3.7.2
	Locking and controlling requests for a J2EE application	3.7.3
	Locking and controlling requests for a schedule queue	3.7.4
	Holding requests if a J2EE server terminates abnormally	3.7.5
Settings	Specifying settings in the execution environment	3.7.6

Note: This section does not provide Implementation, Operation, and Notes types of topics that are specific to this function.

Organization of this section

3.7.1 Overview of locking and controlling requests

3.7.2 Replacing a J2EE application while the system is online

3.7.3 Locking and controlling requests for a J2EE application

3.7.4 Locking and controlling requests for a schedule queue

3.7.5 Holding requests if a J2EE server terminates abnormally

3.7.6 Specifying settings in the execution environment