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PURISTA API / @purista/core / SubscriptionFunctionContextEnhancements

Type Alias: SubscriptionFunctionContextEnhancements<Resources, Invokes, EmitList> ​

SubscriptionFunctionContextEnhancements<Resources, Invokes, EmitList> = object

Defined in: packages/core/src/core/types/subscription/SubscriptionFunctionContext.ts:18

It provides the original command message. Also, the methods:

  • emit which allows to emit custom events to the event bridge
  • invoke which allows to call other commands

Type Parameters ​

Resources ​

Resources extends Record<string, any> = EmptyObject

Invokes ​

Invokes extends InvokeList = EmptyObject

EmitList ​

EmitList extends Record<string, Schema> = EmptyObject

Properties ​

emit ​

emit: EmitCustomMessageFunction<EmitList>

Defined in: packages/core/src/core/types/subscription/SubscriptionFunctionContext.ts:26

emit a custom message

message ​

message: Readonly<EBMessage>

Defined in: packages/core/src/core/types/subscription/SubscriptionFunctionContext.ts:24

the original message

resources ​

resources: Resources

Defined in: packages/core/src/core/types/subscription/SubscriptionFunctionContext.ts:46

Provides resources defined in service builder and set via config during service creation

service ​

service: Invokes

Defined in: packages/core/src/core/types/subscription/SubscriptionFunctionContext.ts:42

Invokes a command and returns the result. It is recommended to validate the result against a schema which only contains the data you actually need.

Example ​

typescript
// define your invocation in subscription builder
.canInvoke<{ response: string }>('ServiceA', '1', 'test', payloadSchema, parameterSchema)
.setCommandFunction(async function (context, payload, _parameter) {
   const inputPayload = { my: 'input' }
   const inputParameter = { search: 'for_me' }
   const result = await context.service.ServiceA[1].test(inputPayload,inputParameter)
})