Writing a CSL client

These topics describe the considerations for writing a CSL client. This information is for the programmer who writes the client, but also for the CSL administrator or IMS™ system programmer who must be aware of the issues involved in designing and writing a CSL client.

Event Control Blocks with CSL requests
The event control block (ECB) is an optional parameter within a CSL request that allows you to specify the address of the z/OS® ECB.
Environmental requirements for SCI requests
The environmental requirements for SCI requests depend on the SCI interface that is assigned to the client.
How to interpret CSL request return and reason codes
Common Service Layer (CSL) return and reason codes indicate the success or failure of sending the request to the CSL address space and reflect the success or failure of the particular CSL request that is being made.
Planning considerations for writing clients for the CSL
Planning tasks are decisions that you must make to determine how you use the CSL managers and CSL requests.
Registration of CSL managers with SCI
ODBM, OM, and RM clients must register with the Structured Call Interface (SCI). You must complete several registration steps in order to use any of the CSL managers.
Requests common to all CSL components
Two requests, CSLZSHUT and CSLZQRY, are common requests that can be processed by all CSL components (OM, RM, and SCI).

Parent topic: Common Service Layer (CSL)