wt-better opened a new issue, #731:
URL: https://github.com/apache/incubator-seata-go/issues/731
Saga is a distributed transaction processing mode used to ensure consistency
in distributed systems.The state machine mode of saga implemented in seata
java, it`s needs to be support in seata go.
The saga state machine is composed of state nodes, among which the choice
node type determines the routing branch based on the expression result. We can
also use expressions to obtain values in the input and output parameters of
the state.
Example:
`{
"Type": "Choice",
"Choices":[
{
"Expression":"[a] == 1",
"Next":"SecondState"
},
{
"Expression":"[a] == 2",
"Next":"ThirdState"
}
],
"Default":"Fail"
}`
` "SecondState": {
"Type": "ServiceTask",
"ServiceName": "demoService",
"ServiceMethod": "bar",
"Input": [
{
"barInput": "$.[fooResult]"
}
],
"Output": {
"result": "$.result"
},
"Next": "Succeed"
}`
We need to implement expression execution and parsing. Considering the
development trend of Seata in multiple languages, we need to choose a
language-independent and neutral expression engine. For example, Google's Cel.
You can also refer to other frameworks such as Argo and Lamba to make a
selection and development.
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