Redeploy is a deployment method of replacing J2EE applications with fewer steps and a higher speed. This section describes how to replace J2EE applications by using the redeploy functionality.

The following table describes the organization of this section.

Table 13-7 Organization of this section (Redeploying J2EE applications)

Category	Title	Reference location
Explanation	Replacing J2EE applications by redeploying	13.7.1
	Statuses and replacement of J2EE applications	13.7.2
Notes	Notes on replacing J2EE applications by redeploying	13.7.3

Note: The functionality-specific explanation is not available for "Implementation", "Settings", and "Operations".

With the replacement of J2EE applications using the redeploy functionality, the information of all the J2EE application attributes can be inherited. You can use the redeploy functionality to replace J2EE applications in the following cases:

Replacing a J2EE application by modifying the logic during J2EE application testing

During testing, if you find a problem in the logic of the J2EE application and then modify the EJB-JAR files and WAR files in that J2EE application, you can use the redeploy functionality to replace the application being tested with the modified J2EE application.

Replacing a running J2EE application with a J2EE application tested in the development environment

You can use the redeploy functionality to replace a J2EE application existing in the development environment with a running J2EE application.

However, you can replace the J2EE applications that have the same application configuration in the operating environment and the development environment, and only a different logic.

When you use the redeploy functionality, the procedure required for replacing a normal J2EE application, such as stopping and deleting the J2EE application before the application is replaced, and importing and deploying the replaced J2EE application, become unnecessary. Therefore, you can replace a J2EE application using fewer steps as compared to the normal process of replacing J2EE applications.

Note that the redeploy functionality can be used to replace the archive-format J2EE applications. You cannot use the redeploy functionality with the exploded archive-format J2EE applications.

Reference note

We recommend that you execute the JSP pre-compile functionality before executing the redeploy functionality. The JSP pre-compile functionality is a functionality that compiles the JSP files included in the Web application before the files are deployed and generates the class files. The procedure until the generation of the class files is implemented in advance, so the response time when the request first reaches the JSP and the start-up time of the Web application can be reduced. For details on the JSP pre-compile functionality, see 2.5 JSP pre-compile functionality and the storage of the compilation results in the uCosminexus Application Server Web Container Functionality Guide.

Organization of this section

13.7.1 Replacing J2EE applications by redeploying

13.7.2 Statuses and replacement of J2EE applications

13.7.3 Notes on replacing J2EE applications by redeploying