InstrumentationContext type

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InstrumentationContext type

Instrumentation context for debugging and profiling.

Passed to the instrument hook of modules when instrumentation is enabled.

Signature:

export type InstrumentationContext = {
    contextId: string;
    contextName: string;
    emit(event: {
        type: string;
        timestamp: number;
        data: Record<string, unknown>;
    }): void;
    register<T>(resource: T, type: string, name?: string): {
        id: string;
        resource: T;
    };
};

Example

const Signal = defineModule({
  name: 'signal',
  create: ({ graphEdges }) => (value) => createSignal(value, graphEdges),
  instrument(impl, instr) {
    return (value) => {
      const sig = impl(value);
      instr.register(sig, 'signal');
      return sig;
    };
  },
});