Overview of Spring Cloud application development

Serverless App Engine (SAE) supports the native Spring Cloud microservice framework. You can migrate Spring Cloud applications to SAE by adding service dependencies and modifying registry configurations, with zero code changes. SAE provides enterprise-level application hosting, governance, monitoring, alerting, and diagnosis capabilities.

Benefits of Spring Cloud

Spring Cloud provides standards and specifications that simplify application development, including service discovery, load balancing, circuit breakers, configuration management, message event triggering, and message bus. It also supports gateways, distributed tracing, security, distributed job scheduling, and distributed job coordination.

Commonly used Spring Cloud components include Spring Cloud Netflix, Spring Cloud Consul, and Spring Cloud Alibaba.

If you developed an application with Spring Cloud components such as Spring Cloud Netflix or Spring Cloud Consul, you can deploy it on SAE for application hosting. SAE also provides advanced monitoring features, including end-to-end tracing, monitoring, alerting, and application diagnosis, without requiring any code changes.

To use additional service governance features in SAE, replace your existing Spring Cloud components with Spring Cloud Alibaba components or add them alongside your current setup.

Compatibility

SAE supports Spring Cloud Greenwich, Finchley, and Edgware. For version mappings among Spring Cloud, Spring Boot, and Spring Cloud Alibaba, see Version mappings.

The following table lists Spring Cloud features, their open source components, and SAE compatibility.

Spring Cloud feature		Open source component	Compatibility with SAE
General features	Service registration and discovery	Netflix Eureka Consul Discovery	Compatible and substitute components available
	Load balancing	Netflix Ribbon	Compatible
	Service calls	Feign RestTemplate	Compatible
Configuration management		Config Server Consul Config	Compatible and substitute components available
Service gateway		Spring Cloud Gateway Netflix Zuul	Compatible
Tracing		Spring Cloud Sleuth	Compatible and substitute components available
Spring Cloud Stream		RabbitMQ binder Kafka binder	Compatible and substitute components available
Spring Cloud Bus		RabbitMQ Kafka	Compatible and substitute components available
Security		Spring Cloud Security	Compatible
Distributed job scheduling		Spring Cloud Task	Yes
Distributed coordination		Spring Cloud Cluster	Compatible

Version mappings

The following table lists the version mappings among Spring Cloud, Spring Boot, Spring Cloud Alibaba, and the commercialized components of SAE.

Spring Cloud	Spring Boot	Spring Cloud Alibaba
ANS	ACM	SchedulerX
Greenwich	2.1.x	2.1.1.RELEASE
Finchley	2.0.x	2.0.1.RELEASE
Edgware	1.5.x	1.5.1.RELEASE
Hoxton	2.2.x	2.2.x

Note Spring Cloud Alibaba Nacos Discovery is an open source component of ANS, and Spring Cloud Alibaba Nacos Config is an open source component of ACM.