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Porting XML Applications

This chapter describes how to port the existing VZAgent applications to Parallels Agent 4.0.0. VZAgent 3.0.3 applications will continue to work with Parallels Agent 4.0.0 without any changes. Earlier protocol versions are not officially supported so the existing applications using protocol version earlier than 3.0.3 may not work correctly and therefore should be either upgraded to version 3.0.3 or ported to version 4.0.0. To upgrade an existing application to version 3.0.3, all you have to do is to change the protocol version number in the headers of your XML messages. To port the existing applications to version 4.0.0, you should read this guide and follow the instructions provided.

If you are going to be using a version 3.0.3 application with Parallels Virtuozzo Containers 4.0, you should be aware that some of the old VZAgent functionality will not work with it. The following list describes the interfaces that are no longer supported:

In This Chapter

Protocol Version

Identifying Hardware Nodes and VPSs

Plug-in Architecture, OOP, Inheritance

Virtuozzo VE Configuration

Virtuozzo VE Management

Hardware Node Management

Performance Monitoring and Statistics Collection

Events and Alerts

File Transfer and Temporary Upload Directory

Authentication Management

Miscellaneous

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