Oracle WebLogic Tuxedo Connector Programmer’s Guide

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Introduction to Oracle WebLogic Tuxedo Connector Programming

Note: For information on how to develop Oracle WebLogic Server Enterprise JavaBeans (EJBs), see Programming WebLogic Enterprise JavaBeans.

The following sections provide information about the development environment you will be using to write code for applications that interoperate between Oracle WebLogic Server and Oracle Tuxedo:

 

Guide to this Document

This document introduces the Oracle WebLogic Tuxedo Connector application development environment. It describes how to develop EJBs that allow Oracle WebLogic Server to interoperate with Oracle Tuxedo objects.

The document is organized as follows:

 

Developing Oracle WebLogic Tuxedo Connector Applications

Note: For more information on the Oracle WebLogic Tuxedo Connector JATMI, view the Javadocs for WebLogic Classes. The Oracle WebLogic Tuxedo Connector classes are located in the weblogic.wtc.jatmi and weblogic.wtc.gwt packages.

In addition to the Java code that expresses the logic of your application, you will be using the Java Application -to-Transaction Monitor Interface (JATMI) to provide the interface between Oracle WebLogic Server and Oracle Tuxedo.

Developing Oracle WebLogic Tuxedo Connector Clients

Note: For more information, see Developing Oracle WebLogic Tuxedo Connector Client EJBs .

A client process takes user input and sends a service request to a server process that offers the requested service. Oracle WebLogic Tuxedo Connector JATMI client classes are used to create clients that access services found in Oracle Tuxedo. These client classes are available to any service that is made available through a the Oracle WebLogic Tuxedo Connector WTCServer MBean.

Developing Oracle WebLogic Tuxedo Connector Servers

Note: For more information, see Developing Oracle WebLogic Tuxedo Connector Service EJBs .

Servers are processes that provide one or more services. They continually check their message queue for service requests and dispatch them to the appropriate service subroutines. Oracle WebLogic Tuxedo Connector uses EJBs to implement services which Oracle Tuxedo clients invoke.

Oracle WebLogic Tuxedo Connector Interoperability with Oracle Tuxedo CORBA objects

Note: For more information, see Using Oracle WebLogic Tuxedo Connector for RMI/IIOP and CORBA Interoperability .

The Oracle WebLogic Tuxedo Connector provides bi-directional interoperability between Oracle WebLogic Server and Oracle Tuxedo CORBA objects. The Oracle WebLogic Tuxedo Connector:

 

Oracle WebLogic Tuxedo Connector JATMI Primitives

The JATMI is a set of primitives used to begin and end transactions, allocate and free buffers, and provide the communication between clients and servers.

Table 1-1 JATMI Primitives
Name
Operation
tpacall
Use for asynchronous invocations of an Oracle Tuxedo service during request/response communication.tpacall has two forms:
  • deferred synchronous
  • asynchronous
tpcall
Use for synchronous invocation of an Oracle Tuxedo service during request/response communication.
tpconnect
Use to establish a connection to an Oracle Tuxedo conversational service.
tpdiscon
Use to abort a conversational connection and generate a TPEV_DISCONIMM event when executed by the process controlling the conversation.
tpdequeue
Use for receiving messages from an Oracle Tuxedo /Q during request/response communication.
tpenqueue
Use for placing a message on an Oracle Tuxedo /Q during request/response communication.
tpgetrply
Use for retrieving replies from an Oracle Tuxedo service during request/response communication.
tprecv
Use to receive data across an open connection from an Oracle Tuxedo application during conversational communication.
tpsend
Use to send data across a open connection to an Oracle Tuxedo application during conversational communication.
tpterm
Use to close a connection to an Oracle Tuxedo object.

 

Oracle WebLogic Tuxedo Connector TypedBuffers

Oracle WebLogic Tuxedo Connector provides an interface called TypedBuffers that corresponds to Oracle Tuxedo typed buffers. Messages are passed to servers in typed buffers. The Oracle WebLogic Tuxedo Connector provides the following buffer types:.

Table 1-2 TypedBuffers
Buffer Type
Description
TypedString
Buffer type used when the data is an array of characters that terminates with the null character. Oracle Tuxedo equivalent: STRING.
TypedCArray
Buffer type used when the data is an undefined array of characters (byte array), any of which can be null. Oracle Tuxedo equivalent: CARRAY.
TypedFML
Buffer type used when the data is self-defined. Each data field carries its own identifier, an occurrence number, and possibly a length indicator. Oracle Tuxedo equivalent: FML.
TypedFML32
Buffer type similar to TypeFML but allows for larger character fields, more fields, and larger overall buffers. Oracle Tuxedo equivalent: FML32.
TypedXML
Buffer type used when data is an XML based message. Oracle Tuxedo equivalent: XML for Tuxedo Release 7.1 and higher.
TypedView
Buffer type used when the application uses a Java structure to define the buffer structure using a view description file. Oracle Tuxedo equivalent: VIEW
TypedView32
Buffer type similar to View but allows for larger character fields, more fields, and larger overall buffers. Oracle Tuxedo equivalent: VIEW32.
TypedMBString
Buffer type used when the data is a wide array of characters to support multibyte characters. Oracle Tuxedo equivalent: MBSTRING.


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