How to define Activity Parameters in Go

The first parameter of an Activity Definition is context.Context. This parameter is optional for an Activity Definition, though it is recommended, especially if the Activity is expected to use other Go SDK APIs.

An Activity Definition can support as many other custom parameters as needed. However, all parameters must be serializable (parameters can’t be channels, functions, variadic, or unsafe pointers), and it is recommended to pass a single struct that can be updated later.

type YourActivityParam struct {
 ActivityParamFieldOne string
 ActivityParamFieldTwo int
}

type YourActivityStruct struct {
 // ...
}

func (a *YourActivityStruct) YourActivityDefinition(ctx context.Context, param YourActivityParam) error {
 // ...
}