Get a web context by application and session

Retrieve the context associated with a referring application and session, always from the remote service. Trigger: OP-01 (resolve web context) step 5 (cross-application arrival).

Field	Value
Operation ID	OP-05
Trigger	OP-01 (resolve web context) step 5 (cross-application arrival)
Inputs	applicationName, sessionId
Outputs	IWebContext
Primary components	WebContextService.Get(string applicationName, string sessionId)
Entry point	src/Web/WebContextService.cs

Steps

1. Enforce.ArgumentNotNullOrEmpty on both applicationName and sessionId (BR-01).
2. Open a WebContextServiceClient at serviceUrl (using block).
3. Call Channel.Get(applicationName, sessionId) on the remote WCF service.**
4. items.UpdateOrAdd(context.ContextId, context) — cache in session (BR-09).
5. Return the context. This path always contacts the remote service; it does not consult the session cache first.

Process flow

The following diagram visualizes this operation's control flow.

flowchart TD
    Start([Cross-application arrival])
    Guard[Guard applicationName/sessionId]
    Open[Open WebContextServiceClient]
    Call["Channel.Get app,session"]
    Cache[Cache in session]
    EndOk([Return context])
    Start --> Guard
    Guard --> Open
    Open --> Call
    Call --> Cache
    Cache --> EndOk

Failure and edge-case behavior

• No unexpected failure paths beyond argument-guard exceptions and delegated dependency behavior were identified for this operation.

Related documentation

• Operations and processes
• Business rules

Note: Statements marked with * were inferred from code structure, naming conventions, or contextual evidence where direct confirmation was not available in source artifacts. Statements marked with ** could not be confirmed; treat as unknown until verified.

Sources

• src/Web/WebContextService.cs