Overview of Advanced Queuing Operations Over the Internet

Figure 17-1 shows the architecture for performing AQ operations over HTTP. The major components are:

• The AQ client program

• The Web server/ServletRunner hosting the AQ servlet

• The Oracle database server

The AQ client program sends XML messages (conforming to IDAP) to the AQ servlet. Any HTTP client, for example Web browsers, can be used. The Web server/ServletRunner hosting the AQ servlet interprets the incoming XML messages. Examples include Apache/Jserv or Tomcat. The AQ servlet connects to the Oracle database server and performs operations on the users' queues.

Figure 17-1 Architecture for Performing AQ Operations Using HTTP

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See "Using HTTP to Access the AQ XML Servlet" and "Using HTTP and HTTPS for Advanced Queuing Propagation" for details.

Figure 17-2 shows additional components in the architecture for sending AQ messages over SMTP:

• Email server

• LDAP server (Oracle Internet Directory)

The email server verifies client signatures using certificates stored in LDAP and then routes the request to the AQ servlet.

Figure 17-2 Architecture for Performing AQ Operations Using SMTP

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See "Using SMTP to Access the AQ Servlet" for more details.