ramu11 commented on code in PR #2046:
URL:
https://github.com/apache/camel-spring-boot/pull/2046#discussion_r4303135185
##########
core/camel-spring-boot/src/main/docs/spring-boot.adoc:
##########
@@ -610,6 +610,56 @@ public class MyRoute extends RouteBuilder {
}
----
+== Spring Cache State Store Support
+
+The `camel-spring-boot` module provides an auto-configured Apache Camel
`KeyValueRepository` backed by Spring's `CacheManager` abstraction
(`org.springframework.cache.CacheManager`).
+
+When a `CacheManager` bean is present in the Spring application context and no
explicit `KeyValueRepository` bean is defined, a
`SpringCacheKeyValueRepository` is automatically registered. This allows any
caching backend supported by Spring Boot (such as Caffeine, Redis via Lettuce,
Ehcache, Hazelcast, or JCache) to seamlessly function as an Apache Camel state
store backend without requiring extra component-specific dependencies.
+
+=== Configuration Example (Caffeine)
+
+[source,yaml]
+----
+spring:
+ cache:
+ type: caffeine
+ cache-names: myStore
+ caffeine:
+ spec: maximumSize=10000,expireAfterWrite=600s
+----
+
+[source,java]
+----
+from("direct:store")
+ .setHeader("CamelStateStoreKey", constant("myKey"))
+ .to("state-store:myStore?operation=put");
+
+from("direct:retrieve")
+ .setHeader("CamelStateStoreKey", constant("myKey"))
+ .to("state-store:myStore?operation=get");
+----
+
+=== Configuration Example (Redis / Lettuce)
+
+[source,yaml]
+----
+spring:
+ cache:
+ type: redis
+ cache-names: myStore
+ data:
+ redis:
+ host: localhost
+ port: 6379
+----
+
+=== Design Considerations & Constraints
+
+* **Store Name Mapping:** Each Camel `state-store:storeName` endpoint maps 1:1
to the Spring Cache name looked up via `CacheManager.getCache(storeName)`.
+* **TTL Support:** Per-entry TTL arguments in the SPI are acknowledged with a
one-time warning log and stored without expiration. To enforce TTL, configure
it at the underlying provider/CacheManager spec level.
+* **Atomicity:** CAS operations (`putIfAbsent`, `replace`, etc.) delegate to
Spring Cache's `putIfAbsent()`, whose atomicity guarantees depend on the
underlying provider (e.g., atomic in Caffeine, potentially non-atomic in
distributed stores like Redis).
Review Comment:
addressed
##########
core/camel-spring-boot/src/main/docs/spring-boot.adoc:
##########
@@ -610,6 +610,56 @@ public class MyRoute extends RouteBuilder {
}
----
+== Spring Cache State Store Support
+
+The `camel-spring-boot` module provides an auto-configured Apache Camel
`KeyValueRepository` backed by Spring's `CacheManager` abstraction
(`org.springframework.cache.CacheManager`).
+
+When a `CacheManager` bean is present in the Spring application context and no
explicit `KeyValueRepository` bean is defined, a
`SpringCacheKeyValueRepository` is automatically registered. This allows any
caching backend supported by Spring Boot (such as Caffeine, Redis via Lettuce,
Ehcache, Hazelcast, or JCache) to seamlessly function as an Apache Camel state
store backend without requiring extra component-specific dependencies.
+
+=== Configuration Example (Caffeine)
+
+[source,yaml]
+----
+spring:
+ cache:
+ type: caffeine
+ cache-names: myStore
+ caffeine:
+ spec: maximumSize=10000,expireAfterWrite=600s
+----
+
+[source,java]
+----
+from("direct:store")
+ .setHeader("CamelStateStoreKey", constant("myKey"))
+ .to("state-store:myStore?operation=put");
+
+from("direct:retrieve")
+ .setHeader("CamelStateStoreKey", constant("myKey"))
+ .to("state-store:myStore?operation=get");
+----
+
+=== Configuration Example (Redis / Lettuce)
+
+[source,yaml]
+----
+spring:
+ cache:
+ type: redis
+ cache-names: myStore
+ data:
+ redis:
+ host: localhost
+ port: 6379
+----
+
+=== Design Considerations & Constraints
+
+* **Store Name Mapping:** Each Camel `state-store:storeName` endpoint maps 1:1
to the Spring Cache name looked up via `CacheManager.getCache(storeName)`.
Review Comment:
addressed
##########
core/camel-spring-boot/src/main/docs/spring-boot.adoc:
##########
@@ -610,6 +610,56 @@ public class MyRoute extends RouteBuilder {
}
----
+== Spring Cache State Store Support
+
+The `camel-spring-boot` module provides an auto-configured Apache Camel
`KeyValueRepository` backed by Spring's `CacheManager` abstraction
(`org.springframework.cache.CacheManager`).
+
+When a `CacheManager` bean is present in the Spring application context and no
explicit `KeyValueRepository` bean is defined, a
`SpringCacheKeyValueRepository` is automatically registered. This allows any
caching backend supported by Spring Boot (such as Caffeine, Redis via Lettuce,
Ehcache, Hazelcast, or JCache) to seamlessly function as an Apache Camel state
store backend without requiring extra component-specific dependencies.
+
+=== Configuration Example (Caffeine)
+
+[source,yaml]
+----
+spring:
+ cache:
+ type: caffeine
+ cache-names: myStore
Review Comment:
addressed
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