[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"lesson-software-architecture-distributed-systems-and-data-service-communication-en":3,"cheat-sheet---en":3,"domain-info---en":3,"prev-software-architecture-distributed-systems-and-data-service-communication-en":3,"next-software-architecture-distributed-systems-and-data-service-communication-en":3,"topic-info-software-architecture-distributed-systems-and-data-service-communication-en":4,"course-lesson-metadata-software-architecture-en":19},null,{"meta":5,"body":8},{"title":6,"description":7},"APIs and Service Communication","How services talk: synchronous APIs, asynchronous messaging, contracts, and gateways.",{"type":9,"value":10,"toc":15},"minimark",[11],[12,13,14],"p",{},"Every integration decision is a coupling decision. This topic compares REST, gRPC, and GraphQL for synchronous calls, covers queues and pub-sub with their delivery guarantees, teaches API contracts and versioning that do not break consumers, and places gateways and service discovery at the system edge.",{"title":16,"searchDepth":17,"depth":17,"links":18},"",3,[],{"lessons":20,"cheatSheets":21,"mockTestsAvailable":22},[],[],false]