Enterprise Integration and Consistency
The message was delivered and the order was never shipped. Both statements can be true at once, and only one of them is what the business asked for.
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API Management and Service Delivery
A gateway can validate credentials and enforce shared policies. Services still need authorization tied to their data and current business state.
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API Contracts, Compatibility, and Retirement
API changes need both a clear compatibility contract and evidence of consumer impact. Errors, retry safety, and retirement are part of that work.
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Cloud Native and Service Boundaries
Service decomposition can leave dependencies intact. Examine ownership, contracts, and shared failures before choosing a distributed topology.