# caffeine **Repository Path**: mirrors_gspandy/caffeine ## Basic Information - **Project Name**: caffeine - **Description**: A high performance caching library for Java 8 - **Primary Language**: Unknown - **License**: Apache-2.0 - **Default Branch**: master - **Homepage**: None - **GVP Project**: No ## Statistics - **Stars**: 0 - **Forks**: 0 - **Created**: 2020-09-24 - **Last Updated**: 2025-10-19 ## Categories & Tags **Categories**: Uncategorized **Tags**: None ## README [![Build Status](https://travis-ci.org/ben-manes/caffeine.svg)](https://travis-ci.org/ben-manes/caffeine) [![Coverage Status](https://img.shields.io/coveralls/ben-manes/caffeine.svg)](https://coveralls.io/r/ben-manes/caffeine?branch=master) [![Maven Central](https://maven-badges.herokuapp.com/maven-central/com.github.ben-manes.caffeine/caffeine/badge.svg)](https://maven-badges.herokuapp.com/maven-central/com.github.ben-manes.caffeine/caffeine) [![JavaDoc](https://javadoc-emblem.rhcloud.com/doc/com.github.ben-manes.caffeine/caffeine/badge.svg)](http://www.javadoc.io/doc/com.github.ben-manes.caffeine/caffeine) [![License](http://img.shields.io/:license-apache-brightgreen.svg)](http://www.apache.org/licenses/LICENSE-2.0.html) [![Stack Overflow](http://img.shields.io/:stack%20overflow-caffeine-brightgreen.svg)](http://stackoverflow.com/questions/tagged/caffeine) Caffeine is a [high performance][benchmarks], [near optimal][efficiency] caching library based on Java 8. For more details, see our [user's guide][users-guide] and browse the [API docs][javadoc] for the latest release. ### Cache Caffeine provides an in-memory cache using a Google Guava inspired API. The improvements draw on our experience designing [Guava's cache][guava-cache] and [ConcurrentLinkedHashMap][clhm]. ```java LoadingCache graphs = Caffeine.newBuilder() .maximumSize(10_000) .expireAfterWrite(5, TimeUnit.MINUTES) .refreshAfterWrite(1, TimeUnit.MINUTES) .build(key -> createExpensiveGraph(key)); ``` #### Features at a Glance Caffeine provides flexible construction to create a cache with a combination of the following features: * [automatic loading of entries][population] into the cache, optionally asynchronously * [size-based eviction][size] when a maximum is exceeded based on [frequency and recency][efficiency] * [time-based expiration][time] of entries, measured since last access or last write * [asynchronously refresh][refresh] when the first stale request for an entry occurs * keys automatically wrapped in [weak references][reference] * values automatically wrapped in [weak or soft references][reference] * [notification][listener] of evicted (or otherwise removed) entries * [writes propagated][writer] to an external resource * accumulation of cache access [statistics][statistics] In addition, Caffeine offers the following extensions: * [JSR-107 JCache][jsr107] * [Guava adapters][guava-adapter] * [Simulation][simulator] Use Caffeine in a community provided integration: * [Spring Cache][spring] (Spring 4.3 & Boot 1.4) * [ScalaCache][scala-cache]: Simple caching in Scala * [Scaffeine][scaffeine]: Scala wrapper for Caffeine * [Ratpack][ratpack]: Lean & powerful HTTP apps * [Finagle][finagle]: Extensible RPC system * [Druid][druid]: Real-time Analytics ### In the News * A short look at what Caffeine brings to your applications. * [Add a Boost of Caffeine to Your Java][add-a-boost] at [VOXXED][voxxed] * An in-depth description of Caffeine's architecture. * [Design of a Modern Cache][modern-cache] ([slides][modern-cache-slides]) at [HighScalability][HighScalability] * Caffeine is presented as part of a research paper evaluating its novel eviction policy. * [TinyLFU: A Highly Efficient Cache Admission Policy][tinylfu] by Gil Einziger, Roy Friedman, Ben Manes On the radar, * Early discussions with [HBase][hbase], [Cassandra][cassandra], and [Solr][solr] * Being adopted in the [Neo4j][neo4j] 3.1 and [Infinispan][infinispan] 9.0 releases * W-TinyLfu implemented by [go-tinylfu][go-tinylfu], [mango-cache][mango-cache], and [ohc][ohc] ### Download Download from [Maven Central][maven] or depend via Gradle: ```gradle compile 'com.github.ben-manes.caffeine:caffeine:2.4.0' // Optional extensions compile 'com.github.ben-manes.caffeine:guava:2.4.0' compile 'com.github.ben-manes.caffeine:jcache:2.4.0' ``` See the [release notes][releases] for details of the changes. Snapshots of the development version are available in [Sonatype's snapshots repository][snapshots]. [benchmarks]: https://github.com/ben-manes/caffeine/wiki/Benchmarks [users-guide]: https://github.com/ben-manes/caffeine/wiki [javadoc]: http://www.javadoc.io/doc/com.github.ben-manes.caffeine/caffeine [guava-cache]: https://github.com/google/guava/wiki/CachesExplained [clhm]: https://code.google.com/p/concurrentlinkedhashmap [population]: https://github.com/ben-manes/caffeine/wiki/Population [size]: https://github.com/ben-manes/caffeine/wiki/Eviction#size-based [time]: https://github.com/ben-manes/caffeine/wiki/Eviction#time-based [refresh]: https://github.com/ben-manes/caffeine/wiki/Refresh [reference]: https://github.com/ben-manes/caffeine/wiki/Eviction#reference-based [listener]: https://github.com/ben-manes/caffeine/wiki/Removal [writer]: https://github.com/ben-manes/caffeine/wiki/Writer [statistics]: https://github.com/ben-manes/caffeine/wiki/Statistics [simulator]: https://github.com/ben-manes/caffeine/wiki/Simulator [guava-adapter]: https://github.com/ben-manes/caffeine/wiki/Guava [jsr107]: https://github.com/ben-manes/caffeine/wiki/JCache [maven]: https://maven-badges.herokuapp.com/maven-central/com.github.ben-manes.caffeine/caffeine [releases]: https://github.com/ben-manes/caffeine/releases [snapshots]: https://oss.sonatype.org/content/repositories/snapshots [efficiency]: https://github.com/ben-manes/caffeine/wiki/Efficiency [tinylfu]: http://arxiv.org/pdf/1512.00727.pdf [add-a-boost]: https://www.voxxed.com/blog/2015/12/add-a-boost-of-caffeine-to-your-java [voxxed]: https://www.voxxed.com [modern-cache]: http://highscalability.com/blog/2016/1/25/design-of-a-modern-cache.html [modern-cache-slides]: https://docs.google.com/presentation/d/1NlDxyXsUG1qlVHMl4vsUUBQfAJ2c2NsFPNPr2qymIBs [highscalability]: http://highscalability.com [spring]: http://docs.spring.io/spring/docs/current/spring-framework-reference/html/cache.html#cache-store-configuration-caffeine [scala-cache]: https://github.com/cb372/scalacache [scaffeine]: https://github.com/blemale/scaffeine [hbase]: https://issues.apache.org/jira/browse/HBASE-15560 [cassandra]: https://issues.apache.org/jira/browse/CASSANDRA-10855 [solr]: https://issues.apache.org/jira/browse/SOLR-8241 [infinispan]: http://blog.infinispan.org/2016/12/data-container-changes-part-1.html [neo4j]: https://github.com/neo4j/neo4j [ohc]: https://github.com/snazy/ohc/issues/34 [go-tinylfu]: https://github.com/dgryski/go-tinylfu [mango-cache]: https://github.com/goburrow/cache [ratpack]: https://github.com/ratpack/ratpack [finagle]: https://github.com/twitter/finagle [druid]: https://github.com/druid-io/druid