106 lines
3.9 KiB
Plaintext
106 lines
3.9 KiB
Plaintext
= Spring Boot Cache Sample
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This sample demonstrates the caching auto-configuration support. Spring's caching
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abstraction is supported by many caching libraries, including:
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* Any compliant `JSR-107` (JCache) provider
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* `EhCache`
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* `Hazelcast`
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* `Infinispan`
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* `Couchbase`
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* `Redis`
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* `Guava`
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* Simple provider based on `ConcurrentHashMap`
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* Generic provider based on `org.springframework.Cache` bean definition(s)
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The sample defines a simple `CountryService` that caches countries by ISO code. When
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the application starts a client invokes the service with a random code every 500ms. You
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can look at the `/metrics` endpoint to review the cache statistics if your chosen
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caching provider is supported.
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== Using the JSR-107 annotations
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The sample uses Spring's cache annotation. If you want to use the JSR-107 annotations
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instead, simply add the `javax.cache:cache-api` dependency to the project. No further
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configuration is necessary.
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NOTE: You can use the JSR-107 annotations with _any_ cache provider; a JSR-107 compliant
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cache provider is not necessary.
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== Using a different cache provider
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Initially, the project does not define any caching library so the abstraction works
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on simple `ConcurrentHashMap`-based caches. You can try out your favorite caching library
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as explained below.
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=== JCache (JSR-107)
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If you want to configure your cache infrastructure via the standard, you need a compliant
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implementation and the JSR-107 api. You first need to add `javax.cache:cache-api` to your
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project. Then you could try the following:
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* `Hazelcast`: add `com.hazelcast:hazelcast`
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* `Infinispan`: add `org.infinispan:infinispan-jcache`
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TIP: Certain cache providers do not create a default cache on-the-fly if it does not exist
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so you might need to update the sample to create the caches on startup or specify the
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location to the provider-specific file via the `spring.cache.jcache.config` property.
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NOTE: Any other JSR-107 compliant provider is also supported but Spring Boot may not
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offer a dependency management entry for it. You will have to add it with the version
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of the library that you want to use.
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=== EhCache 2.x
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Simply add the `net.sf.ehcache:ehcache` dependency to the project. Since there is a
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default `ehcache.xml` configuration file at the root of the classpath, it is automatically
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used to configure the underlying `CacheManager`.
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=== Hazelcast
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Both `com.hazelcast:hazelcast` and `com.hazelcast:hazelcast-spring` should be added to
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the project to enable support for Hazelcast. Since there is a default `hazelcast.xml`
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configuration file at the root of the classpath, it is used to automatically configure
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the underlying `HazelcastInstance`.
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=== Infinispan
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Simply add the `org.infinispan:infinispan-spring4` dependency to enable support for
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Infinispan. There is no default location that Infinispan uses to look for a config
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file so if you don't specify anything it will bootstrap on a hardcoded default. You
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can set the `spring.cache.infinispan.config` property to use the provided
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`infinispan.xml` configuration instead.
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=== Couchbase
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Add the `java-client` and `couchbase-spring-cache` dependencies and make sure that you
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have setup at least a `spring.couchbase.bootstrap-hosts` property.
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=== Redis
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Add the `spring-boot-starter-data-redis` and make sure it is configured properly (by default,
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a redis instance with the default settings is expected on your local box).
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=== Caffeine
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Simply add the `com.github.ben-manes.caffeine:caffeine` dependency to enable support
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for Caffeine. You can customize how caches are created in different ways, see
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`application.properties` for an example and the documentation for more details.
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=== Guava
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Spring Boot does not provide any dependency management for _Guava_ so you'll have to add
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the `com.google.guava:guava` dependency with a version. You can customize how caches are
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created in different ways, see `application.properties` for an example and the
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documentation for more details.
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