This document gives an overview on application programming interfaces (APIs) to provide the context for an RPC call, for example passwords or a default server. The following topics are covered:
The API RPC-CNTX can be used for providing a context for RPC calls as it is done in test programs generated by the webMethods EntireX Natural Wrapper.
RPC-CNTX combines the functionality of several APIs and is available in library SYSTEM. There is no need for extra preparations such as setting a STEPLIB or to copy APIs from SYSEXT to user libraries.
To make use of RPC-CNTX
Specify a DEFINE DATA statement
where level 01 is defined by 01 RPC-CNTX-AREA, and specify the following parameters on level 02:
| Parameter | Format | I/O | Description | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| FUNCTION | A02 | I |
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| BROKERID | A dynamic | I/O | Specify the Broker name or a logical Broker node name as LOGBROKER=nodename.
See the profile parameter SRVNODE.
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| CLASS | A32 | I | Specify the server class. For Natural RPC servers, this is RPC.
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| SERVER | A32 | I/O | Specify the server class name. | ||||||||||||
| SERVICE | A32 | I | Specify the type of RPC. For Natural RPC servers, this is CALLNAT.
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| COMPRESSLEVEL | A01 | I/O | Compression level requires ACI version 7. | ||||||||||||
| ENCRYPTIONLEVEL | I01 | I/O | Encryption level requires ACI version 6. | ||||||||||||
| RPC-LIBRARY | A08 | I | |||||||||||||
| RPC-RELIABLE-STATE | N01 | I/O |
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| NAT-LOGON | A011 | I/O | |||||||||||||
| EXX-USERID | A32 | I | |||||||||||||
| EXX-PASSWORD | A32 | I | |||||||||||||
| RPC-USERID | A32 | I | |||||||||||||
| RPC-PASSWORD | A32 | I | |||||||||||||
| ERR-CODE | I04 | O | The origin of some error code can be detected by the following identifiers:
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| ERR-TEXT | A dynamic | O |
Note:
The most important function codes are 'SL' and 'LF'. Function code 'SL' is a combination of setting the RPC context ('SC') and a logon to EntireX Broker ('LO').
In the calling program on the client side, specify the following statement:
CALLNAT 'RPC-CNTX' RPC-CNTX-AREA
For further information refer to Syntax Description in CALLNAT int the Statements documentation.
The setting of the RPC context is processed as follows:
Set the credentials for RPC server by specifying RPC-USERID and RPC-PASSWORD (API USR1071N).
Set the mode for reliable RPC by specifying RPC-RELIABLE-STATE (API USR6304N).
Set the data for the RPC default server including the logon option with a specification for BROKERID, SERVER and NAT-LOGON (API USR2007N).
Change the library name on the RPC server for the logon by specifying RPC-LIBRARY (API USR4008N). If the name is left blank, the API is not called.
Set parameters for EntireX, COMPRESSLEVEL or ENCRYPTIONLEVEL, using API USR4009N. If the no values are specified, the API is not called.
For logging on to the Broker, specify BROKERID, EXX-USERID, and EXX-PASSWORD, which are then passed to USR2071N.
After you have finished your work with the RPC connection, you need to log off from the EntireX Broker using RPC-CNTX with
function code 'LF'.
Entries with a hyperlink correspond to APIs that are documented in the Natural documentation. You can also find a description
of an API in library SYSEXT under the name USRnnnnT. The raw content of the table was generated by running SYSEXT with keyword RPC:
| API name | Description |
|---|---|
| USR1071N | Set credentials for RPC server. Send logon data to the Natural RPC server if the client has no NSC, or if the client has NSC: for using a different user ID and password on server side. |
| USR2007N | Get or set data for RPC default server, including the logon option. |
| USR2032N | Support commit for CLOSE CONVERSATION. |
| USR2035N | Get or set parameters for SSL support. |
| USR2071N | Support EntireX Security on client side. Logon to EntireX Broker. |
| USR2072N | Support EntireX Security on server side. Specify a password which is used for the LOGON in conjunction with profile parameter SRVUSER. |
| USR2073N | Ping or terminate a Natural RPC server. |
| USR2074N | Change the Natural Security password on the Natural RPC server. |
| USR2075N | Terminate an EntireX Broker Service. |
| USR2076N | Get or set RPC TIMEOUT value. |
| USR4008N | Pass another library name to the Natural RPC server to log on to. |
| USR4009N | Set parameters for EntireX. |
| USR4010N | Get runtime settings of RPC server. |
| USR4012N | Set application error on RPC server. |
| USR6304N | Set/Get the mode for reliable RPC. |
| USR6305N | Commit or roll back a unit of work that has been created with CLIENT_COMMIT. |
| USR6306N | Get the status of all reliable RPC messages that you have previously sent under your user ID. |
