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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,21 +1,31 @@ | ||
| This sample workflow demos context propagation through a workflow. Details about context propagation are | ||
| This sample Workflow demos context propagation through a Workflow. Details about context propagation are | ||
| available [here](https://docs.temporal.io/docs/go-tracing). | ||
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| The sample workflow initializes the client with a context propagator which propagates | ||
| specific information in the `context.Context` object across the workflow. The `context.Context` object is populated | ||
| with the information prior to calling `StartWorkflow`. The workflow demonstrates that the information is available | ||
| in the workflow and any activities executed. | ||
| The sample Workflow initializes the client with a context propagator which propagates | ||
| specific information in the `context.Context` object across the Workflow. The `context.Context` object is populated | ||
| with the information prior to calling `StartWorkflow`. The Workflow demonstrates that the information is available | ||
| in the Workflow and any activities executed. | ||
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| Also, this sample initializes a Jaeger global tracer and pass it to the client. The sample will work without | ||
| actual Jaeger instance -- just report every tracer call to the log. To see traces in Jaeger run it with follow command: | ||
| ``` | ||
| $ docker run --publish 6831:6831 --publish 16686:16686 jaegertracing/all-in-one:latest | ||
| ``` | ||
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| Steps to run this sample: | ||
| 1) You need a Temporal service running. See details README.md | ||
| 2) Run the following command multiple times on different console window. This is to simulate running workers on multiple different machines. | ||
| 1) You need a Temporal service running. See details README.md. | ||
| 2) Run | ||
| ``` | ||
| go run ctxpropagation/worker/main.go | ||
| ``` | ||
| 3) Run the following command to execute the context: | ||
| to start worker for `ctxpropagation` Workflow. | ||
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| 3) Run: | ||
| ``` | ||
| go run ctxpropagation/starter/main.go | ||
| ``` | ||
| to start Workflow. | ||
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| You should see prints showing the context information available in the workflow and activities. | ||
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| You should see prints showing the context information available in the workflow | ||
| and activities. |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| package ctxpropagation | ||
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| import ( | ||
| "io" | ||
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| "github.com/opentracing/opentracing-go" | ||
| "github.com/uber/jaeger-client-go" | ||
| "github.com/uber/jaeger-client-go/config" | ||
| ) | ||
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| func SetJaegerGlobalTracer() io.Closer { | ||
| cfg := config.Configuration{ | ||
| ServiceName: "ctx-propogation-sample", | ||
| Sampler: &config.SamplerConfig{ | ||
| Type: jaeger.SamplerTypeConst, | ||
| Param: 1, | ||
| }, | ||
| Reporter: &config.ReporterConfig{ | ||
| LogSpans: true, | ||
| }, | ||
| } | ||
| tracer, closer, err := cfg.NewTracer( | ||
| config.Logger(jaeger.StdLogger), | ||
| ) | ||
| if err != nil { | ||
| panic(err) | ||
| } | ||
| opentracing.SetGlobalTracer(tracer) | ||
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| return closer | ||
| } |
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