The Ehcache documentation focuses on XML declarative configuration. Programmatic Memory-Based Cache Sizing (Ehcache and higher). Initially . Ehcache and higher does not allow multiple CacheManagers with the same See the Ehcache API documentation for more information on these methods. Documentation Ehcache is an open source, standards-based cache that boosts performance, This version of Ehcache increases on-heap performance.
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However, since Ehcache 2. While both approaches are fully supported, it is generally a good idea to separate the cache configuration from runtime use. Programmatic configuration is explored in certain examples and is documented in Javadocs.
After a Cache has been started, its configuration is not generally changeable. An element is an atomic doocumentation in a cache. The source code for this page can be found here.
Grails Plugin: Ehcache Cache Plugin
documenfation You could do this all in code, but it would not as visible. This is provided for ease of migration. There are also these benefits:.
In this example, each user has a different cached result. It contains comments to help you configure each element. To provide an implementation of the cache API in addition to the default implementation, you can either create a custom qualifier, or reuse the NamedCache qualifier to bind the implementation.
The BootstrapCacheLoader is run before the cache is set to alive. Caches consume memory, and disk space. When LRU is selected as the eviction policy, set this system property to true using java -Dnet.
Caches can be configured in Ehcache either declaratively in XML, or by creating caches programmatically and specifying their parameters in the constructor. Setting this system property to true ehcacue java -Dnet. If an attempt is made to persist or replicate them they are discarded without error and ehcach a DEBUG level log message. If disabled, no dicumentation can be added to a cache puts are silently discarded.
Note that some elements documented in the sample Ehcache XML file pertain only to BigMemory and are not valid for the open-source version of Ehcache. They need documentatipn be carefully tuned.
The APIs are identical except for the return methods from Element. Creation of, access to, and removal of caches is controlled by the CacheManager.
The non-default creation methods allow a configuration file to be specified with any name you want. If the Caches under management use only the MemoryStore, there are no special considerations.
This is configured using the copyOnRead and copyOnWrite attributes of cache and defaultCache elements in your configuration or programmatically as follows:. In the default Ehcache implementation, the default cache is called playand can be configured by creating a file called ehxache. To replace the documentztion implementation based on something other than Ehcache, you only need the cacheApi dependency rather than the ehcache dependency in your build.
Key Classes and Methods
CacheManager supports two creation modes: Versions of Ehcache before version 2. An important point about the cache is that it behaves dockmentation like a cache should: You can docymentation the total effect in a configuration file.
BigMemory introduced the OffHeap store, where sizing of caches is also allowed. It is possible to provide a custom implementation of the cache API that either replaces, or sits along side the default implementation. If that is the case, you can throw an UnsupportedOperationException in the removeAll method. Cache elements are stored in the MemoryStore.
The element expires at this limit and will no longer be returned from the cache. Now to access these different caches, when you inject them, documentagion the NamedCache qualifier on your dependency, for example:.
CacheManager to the default provider, add the following to your dependencies list:. The methods provided by these classes are largely responsible for providing programmatic access to working with Ehcache.
It is also used to get non-identifying feedback on the operating system architectures using Ehcache. CacheManager can still be used in this way using the static factory methods. They can also expire and be removed by the Cache, depending on the Cache settings. Found an error in this documentation? If you are using compile-time DI, mix EhCacheComponents into your components cake to get access to the defaultCacheApi and the cacheApi method for getting a cache by name.
After reading the documentation guidelinesplease feel free to contribute a pull request.