Spring for GraphQL: Mutation

Spring for GraphQL mutation
In GraphQL, a mutation is used to insert, update or delete data. The mutation API is defined with the type Mutation rather than the Query. In Spring for Graphql, a mutation can be implemented using @SchemaMapping or @MutationMapping.
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gRPC: synchronous and asynchronous Server streaming RPC

gRPC, one of the most popular RPC frameworks for inter-process microservices communication, supports both unary and streaming RPC. Contrary to unary RPC, in gRPC streaming RPC, a client sends a single request, and in return, the server sends a stream of messages. In this article, we will see how to implement server streaming RPC and how to handle errors in streaming response.
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