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Typed Buffer Errors
Typed buffer errors are returned when requests or replies to processes are sent in buffers of an unknown type. The tpcall(), tpacall(), and tpconnect() functions return TPEITYPE when a request data buffer is sent to a service that does not recognize the type of the buffer.
Processes recognize buffer types that are identified in both the configuration file and the BEA Tuxedo system libraries that are linked into the process. These libraries define and initialize a data structure that identifies the typed buffers that the process recognizes. You can tailor the library to each process, or an application can supply its own copy of a file that defines the buffer types. An application can set up the buffer type data structure (referred to as a buffer type switch) on a process-specific basis. For more information, see tuxtypes(5)and typesw(5) in the BEA Tuxedo File Formats and Data Descriptions Reference.
The tpcall(), tpgetrply(), tpdequeue(3c), and tprecv() functions return TPEOTYPE when a reply message is sent in a buffer that is not recognized or not allowed by the caller. In the latter case, the buffer type is included in the type switch, but the type returned does not match the type that was allocated to receive the reply and a change in buffer type is not allowed by the caller. The caller indicates this preference by setting flags to TPNOCHANGE. In this case, strong type checking is enforced; the system returns TPEOTYPE when it is violated. By default, weak type checking is used. In this case, a buffer type other than the type originally allocated may be returned, as long as that type is recognized by the caller. The rules for sending replies are that the reply buffer must be recognized by the caller and, if strong type checking has been indicated, you must observe it.
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Copyright © 2000 BEA Systems, Inc. All rights reserved.
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