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Simple Cosmos DB Persistence Usage
Using Cosmos DB Persistence to store sagas
2020-09-22
CosmosDB
nservicebus/sagas
samples/previews/cosmosdb/simple

This sample shows a client/server scenario using non-transactional saga persistence.

Projects

SharedMessages

The shared message contracts used by all endpoints.

Client

  • Sends the StartOrder message to Server.
  • Receives and handles the OrderCompleted event.

Server projects

  • Receive the StartOrder message and initiate an OrderSaga.
  • OrderSaga requests a timeout with an instance of CompleteOrder with the saga data.
  • OrderSaga publishes an OrderCompleted event when the CompleteOrder timeout fires.

Persistence config

Configure the endpoint to use Cosmos DB Persistence.

snippet: CosmosDBConfig

In the non-transactional mode the saga id is used as a partition key and thus the container needs to use /id as the partition key path.

Order saga data

snippet: sagadata

Order saga

snippet: thesaga