CompositeTracer

Implements: ITracer, IReferenceable

Description

The CompositeTracer class allows you to aggregate all tracers from component references under a single component.

References

• *:tracer:*:*:1.0 - (optional) ITracer components to pass operation tracessource

Constructors

Creates a new instance of the tracer.

public constructor(references: IReferences = null)

• references: IReferences - references to locate the component dependencies.

Fields

Instance methods

beginTrace

Begings recording an operation trace

public beginTrace(context: IContext, component: string, operation: string): TraceTiming

• correlationId: string - (optional) transaction id to trace execution through call chain.
• component: string - name of the called component
• operation: string - name of the executed operation.
• return: TraceTiming - a trace timing object.

failure

Records an operation failure with its name, duration and error

public failure(context: IContext, component: string, operation: string, error: Error, duration: number)

• correlationId: string - (optional) transaction id to trace execution through call chain.
• component: string - name of the called component
• operation: string - name of the executed operation.
• error: Error - an error object associated with this trace.
• duration: number - execution duration in milliseconds.

setReferences

Sets references to dependent components.

public setReferences(references: IReferences)

• references: IReferences - references to locate the component dependencies.

trace

Records an operation trace with its name and duration

public trace(context: IContext, component: string, operation: string, duration: number)

• correlationId: string - (optional) transaction id to trace execution through call chain.
• component: string - a name of called component
• operation: string - a name of the executed operation.
• duration: number - execution duration in milliseconds.

Examples

class MyComponent implements IReferenceable {
    private _tracer: CompositeTracer = new CompositeTracer();

    public setReferences(references: IReferences): void {
        this._tracer.setReferences(references);
        ...
    }

    public myMethod(correlatonId: string): void {
        var timing = this._tracer.beginTrace(correlationId, "mycomponent", "mymethod");
        try {
            ...
            timing.endTrace();
        } catch (err) {
            timing.endFailure(err);
        }
    }
}

See also

• ITracer