README.asciidoc

   1 = memoization.java image:https://img.shields.io/badge/email-%40metio-brightgreen.svg?style=social&label=mail["Discuss on Google Groups", link="https://groups.google.com/forum/#!forum/metio"] image:https://img.shields.io/badge/irc-%23metio.wtf-brightgreen.svg?style=social&label=IRC["Chat on IRC", link="http://webchat.freenode.net/?channels=metio.wtf"]
   2 Sebastian Hoß <http://seb.xn--ho-hia.de/[@sebhoss]>
   3 :github-org: sebhoss
   4 :project-name: memoization.java
   5 :project-group: de.xn--ho-hia.memoization
   6 :coverity-project: 8732
   7 :codacy-project: 0ed810b7f2514f0ea1c8e86e97c803c4
   8 :jdk-api: https://docs.oracle.com/javase/8/docs/api
   9 :issue: https://github.com/sebhoss/memoization.java/issues
  10 :toc:
  11 :toc-placement: preamble
  12
  13 image:https://img.shields.io/badge/license-cc%20zero-000000.svg?style=flat-square["CC Zero", link="http://creativecommons.org/publicdomain/zero/1.0/"]
  14 pass:[<span class="image"><a class="image" href="https://maven-badges.herokuapp.com/maven-central/de.xn--ho-hia.memoization/memoization.java"><img src="https://img.shields.io/maven-central/v/de.xn--ho-hia.memoization/memoization.java.svg?style=flat-square" alt="Maven Central"></a></span>]
  15 image:https://reposs.herokuapp.com/?path={github-org}/{project-name}&style=flat-square["Repository size"]
  16 image:https://www.openhub.net/p/memoization-java/widgets/project_thin_badge?format=gif["Open Hub statistics", link="https://www.openhub.net/p/memoization-java"]
  17
  18 image:https://img.shields.io/travis/{github-org}/{project-name}/master.svg?style=flat-square["Build Status", link="https://travis-ci.org/{github-org}/{project-name}"]
  19 image:https://img.shields.io/coveralls/{github-org}/{project-name}/master.svg?style=flat-square["Code Coverage", link="https://coveralls.io/github/{github-org}/{project-name}"]
  20 image:https://img.shields.io/coverity/scan/{coverity-project}.svg?style=flat-square["Coverity Scan Result", link="https://scan.coverity.com/projects/{github-org}-memoization-java"]
  21 image:https://img.shields.io/codacy/grade/{codacy-project}.svg?style=flat-square["Codacy Code Quality", link="https://www.codacy.com/app/mail_7/memoization-java"]
  22 image:https://img.shields.io/badge/forkable-yes-brightgreen.svg?style=flat-square["Can this project be forked?", link="https://basicallydan.github.io/forkability/?u={github-org}&r={project-name}"]
  23 image:https://img.shields.io/maintenance/yes/2016.svg?style=flat-square["Is this thing still maintained?"]
  24 image:https://img.shields.io/bountysource/team/metio/activity.svg?style=flat-square["Bounties on open tickets", link="https://www.bountysource.com/teams/metio"]
  25
  26 _Java link:https://en.wikipedia.org/wiki/Memoization[memoization] library - trade space for time_
  27
  28 == Features
  29
  30 * Memoize calls to `Consumer`, `Function`, `Predicate`, `Supplier` and other functional interfaces in `java.util.function`
  31 * Cache values using link:https://github.com/ben-manes/caffeine[Caffeine], link:https://github.com/google/guava/wiki/CachesExplained[Guava], link:https://jcp.org/en/jsr/detail?id=107[JCache] or any link:{jdk-api}/java/util/concurrent/ConcurrentMap.html[`ConcurrentMap`]
  32 * Customize cache key calculation
  33
  34 .Coverage of `java.util.function`
  35 |===
  36 | | Caffeine | Guava | JCache | ConcurrentMap
  37
  38 | link:{jdk-api}/java/util/function/BiConsumer.html[BiConsumer]
  39 | ✓
  40 | ✓
  41 | ✓
  42 | ✓
  43
  44 | link:{jdk-api}/java/util/function/BiFunction.html[BiFunction]
  45 | ✓
  46 | ✓
  47 | ✓
  48 | ✓
  49
  50 | link:{jdk-api}/java/util/function/BiPredicate.html[BiPredicate]
  51 | ✓
  52 | ✓
  53 | ✓
  54 | ✓
  55
  56 | link:{jdk-api}/java/util/function/BooleanSupplier.html[BooleanSupplier]
  57 | ✓
  58 | ✓
  59 | ✓
  60 | ✓
  61
  62 | link:{jdk-api}/java/util/function/Consumer.html[Consumer]
  63 | ✓
  64 | ✓
  65 | ✓
  66 | ✓
  67
  68 | link:{jdk-api}/java/util/function/DoubleBinaryOperator.html[DoubleBinaryOperator]
  69 | ✓
  70 | ✓
  71 | ✓
  72 | ✓
  73
  74 | link:{jdk-api}/java/util/function/DoubleConsumer.html[DoubleConsumer]
  75 | ✓
  76 | ✓
  77 | ✓
  78 | ✓
  79
  80 | link:{jdk-api}/java/util/function/DoubleFunction.html[DoubleFunction]
  81 | ✓
  82 | ✓
  83 | ✓
  84 | ✓
  85
  86 | link:{jdk-api}/java/util/function/DoublePredicate.html[DoublePredicate]
  87 | ✓
  88 | ✓
  89 | ✓
  90 | ✓
  91
  92 | link:{jdk-api}/java/util/function/DoubleSupplier.html[DoubleSupplier]
  93 | ✓
  94 | ✓
  95 | ✓
  96 | ✓
  97
  98 | link:{jdk-api}/java/util/function/DoubleToIntFunction.html[DoubleToIntFunction]
  99 | ✓
 100 | ✓
 101 | ✓
 102 | ✓
 103
 104 | link:{jdk-api}/java/util/function/DoubleToLongFunction.html[DoubleToLongFunction]
 105 | ✓
 106 | ✓
 107 | ✓
 108 | ✓
 109
 110 | link:{jdk-api}/java/util/function/DoubleUnaryOperator.html[DoubleUnaryOperator]
 111 | ✓
 112 | ✓
 113 | ✓
 114 | ✓
 115
 116 | link:{jdk-api}/java/util/function/Function.html[Function]
 117 | ✓
 118 | ✓
 119 | ✓
 120 | ✓
 121
 122 | link:{jdk-api}/java/util/function/IntBinaryOperator.html[IntBinaryOperator]
 123 | ✓
 124 | ✓
 125 | ✓
 126 | ✓
 127
 128 | link:{jdk-api}/java/util/function/IntConsumer.html[IntConsumer]
 129 | ✓
 130 | ✓
 131 | ✓
 132 | ✓
 133
 134 | link:{jdk-api}/java/util/function/IntFunction.html[IntFunction]
 135 | ✓
 136 | ✓
 137 | ✓
 138 | ✓
 139
 140 | link:{jdk-api}/java/util/function/IntPredicate.html[IntPredicate]
 141 | ✓
 142 | ✓
 143 | ✓
 144 | ✓
 145
 146 | link:{jdk-api}/java/util/function/IntSupplier.html[IntSupplier]
 147 | ✓
 148 | ✓
 149 | ✓
 150 | ✓
 151
 152 | link:{jdk-api}/java/util/function/IntToDoubleFunction.html[IntToDoubleFunction]
 153 | ✓
 154 | ✓
 155 | ✓
 156 | ✓
 157
 158 | link:{jdk-api}/java/util/function/IntToLongFunction.html[IntToLongFunction]
 159 | ✓
 160 | ✓
 161 | ✓
 162 | ✓
 163
 164 | link:{jdk-api}/java/util/function/IntUnaryOperator.html[IntUnaryOperator]
 165 | ✓
 166 | ✓
 167 | ✓
 168 | ✓
 169
 170 | link:{jdk-api}/java/util/function/LongBinaryOperator.html[LongBinaryOperator]
 171 | ✓
 172 | ✓
 173 | ✓
 174 | ✓
 175
 176 | link:{jdk-api}/java/util/function/LongConsumer.html[LongConsumer]
 177 | ✓
 178 | ✓
 179 | ✓
 180 | ✓
 181
 182 | link:{jdk-api}/java/util/function/LongFunction.html[LongFunction]
 183 | ✓
 184 | ✓
 185 | ✓
 186 | ✓
 187
 188 | link:{jdk-api}/java/util/function/LongPredicate.html[LongPredicate]
 189 | ✓
 190 | ✓
 191 | ✓
 192 | ✓
 193
 194 | link:{jdk-api}/java/util/function/LongSupplier.html[LongSupplier]
 195 | ✓
 196 | ✓
 197 | ✓
 198 | ✓
 199
 200 | link:{jdk-api}/java/util/function/LongToDoubleFunction.html[LongToDoubleFunction]
 201 | ✓
 202 | ✓
 203 | ✓
 204 | ✓
 205
 206 | link:{jdk-api}/java/util/function/LongToIntFunction.html[LongToIntFunction]
 207 | ✓
 208 | ✓
 209 | ✓
 210 | ✓
 211
 212 | link:{jdk-api}/java/util/function/LongUnaryOperator.html[LongUnaryOperator]
 213 | ✓
 214 | ✓
 215 | ✓
 216 | ✓
 217
 218 | link:{jdk-api}/java/util/function/ObjDoubleConsumer.html[ObjDoubleConsumer]
 219 | ✓
 220 | ✓
 221 | ✓
 222 | ✓
 223
 224 | link:{jdk-api}/java/util/function/ObjIntConsumer.html[ObjIntConsumer]
 225 | ✓
 226 | ✓
 227 | ✓
 228 | ✓
 229
 230 | link:{jdk-api}/java/util/function/ObjLongConsumer.html[ObjLongConsumer]
 231 | ✓
 232 | ✓
 233 | ✓
 234 | ✓
 235
 236 | link:{jdk-api}/java/util/function/Predicate.html[Predicate]
 237 | ✓
 238 | ✓
 239 | ✓
 240 | ✓
 241
 242 | link:{jdk-api}/java/util/function/Supplier.html[Supplier]
 243 | ✓
 244 | ✓
 245 | ✓
 246 | ✓
 247
 248 | link:{jdk-api}/java/util/function/ToDoubleBiFunction.html[ToDoubleBiFunction]
 249 | ✓
 250 | ✓
 251 | ✓
 252 | ✓
 253
 254 | link:{jdk-api}/java/util/function/ToDoubleFunction.html[ToDoubleFunction]
 255 | ✓
 256 | ✓
 257 | ✓
 258 | ✓
 259
 260 | link:{jdk-api}/java/util/function/ToIntBiFunction.html[ToIntBiFunction]
 261 | ✓
 262 | ✓
 263 | ✓
 264 | ✓
 265
 266 | link:{jdk-api}/java/util/function/ToIntFunction.html[ToIntFunction]
 267 | ✓
 268 | ✓
 269 | ✓
 270 | ✓
 271
 272 | link:{jdk-api}/java/util/function/ToLongBiFunction.html[ToLongBiFunction]
 273 | ✓
 274 | ✓
 275 | ✓
 276 | ✓
 277
 278 | link:{jdk-api}/java/util/function/ToLongFunction.html[ToLongFunction]
 279 | ✓
 280 | ✓
 281 | ✓
 282 | ✓
 283 |===
 284
 285
 286 == Development Status
 287
 288 The Caffeine, Guava, JCache and `ConcurrentMap` based implementations cover all functional interfaces from `java.util.function`. Take a look at the link:https://github.com/sebhoss/memoization.java/issues[open tickets] for future ideas & ways to help out.
 289
 290 == Usage
 291
 292 Memoize any of the supported types by using the static factory methods supplied by either using `CaffeineMemoize` pass:[<span class="image"><a class="image" href="https://www.javadoc.io/doc/de.xn--ho-hia.memoization/memoization-caffeine"><img src="https://www.javadoc.io/badge/de.xn--ho-hia.memoization/memoization-caffeine.svg?style=flat-square&color=blue" alt="Read JavaDocs"></a></span>], `GuavaMemoize` pass:[<span class="image"><a class="image" href="https://www.javadoc.io/doc/de.xn--ho-hia.memoization/memoization-guava"><img src="https://www.javadoc.io/badge/de.xn--ho-hia.memoization/memoization-guava.svg?style=flat-square&color=blue" alt="Read JavaDocs"></a></span>], `JCacheMemoize` pass:[<span class="image"><a class="image" href="https://www.javadoc.io/doc/de.xn--ho-hia.memoization/memoization-jcache"><img src="https://www.javadoc.io/badge/de.xn--ho-hia.memoization/memoization-jcache.svg?style=flat-square&color=blue" alt="Read JavaDocs"></a></span>] or `MapMemoize` pass:[<span class="image"><a class="image" href="https://www.javadoc.io/doc/de.xn--ho-hia.memoization/memoization-core"><img src="https://www.javadoc.io/badge/de.xn--ho-hia.memoization/memoization-core.svg?style=flat-square&color=blue" alt="Read JavaDocs"></a></span>] like this:
 293
 294 === Default cache w/ default cache keys
 295
 296 [source, java]
 297 ----
 298 // memoize in Caffeine cache
 299 Consumer<INPUT> consumer                 = ...;
 300 Consumer<INPUT> memoizedConsumer         = CaffeineMemoize.consumer(consumer);
 301
 302 // memoize in Guava cache
 303 Function<INPUT, OUTPUT> function         = ...;
 304 Function<INPUT, OUTPUT> memoizedFunction = GuavaMemoize.function(function);
 305
 306 // memoize in JCache cache
 307 Predicate<INPUT> predicate               = ...;
 308 Predicate<INPUT> memoizedPredicate       = JCacheMemoize.predicate(predicate);
 309
 310 // memoize in ConcurrentMap
 311 Supplier<OUTPUT> supplier                = ...;
 312 Supplier<OUTPUT> memoizedSupplier        = MapMemoize.supplier(supplier);
 313 ----
 314
 315 === Default cache w/ custom cache keys
 316
 317 [source, java]
 318 ----
 319 // memoize in Caffeine cache
 320 Consumer<INPUT> consumer                 = ...;
 321 Function<INPUT, KEY> keyFunction         = ...;
 322 Consumer<INPUT> memoizedConsumer         = CaffeineMemoize.consumer(consumer, keyFunction);
 323
 324 // memoize in Guava cache
 325 Function<INPUT, OUTPUT> function         = ...;
 326 Function<INPUT, KEY> keyFunction         = ...;
 327 Function<INPUT, OUTPUT> memoizedFunction = GuavaMemoize.function(function, keyFunction);
 328
 329 // memoize in JCache cache
 330 Predicate<INPUT> predicate               = ...;
 331 Function<INPUT, KEY> keyFunction         = ...;
 332 Predicate<INPUT> memoizedPredicate       = JCacheMemoize.predicate(predicate, keyFunction);
 333
 334 // memoize in ConcurrentMap
 335 Supplier<OUTPUT> supplier                = ...;
 336 Supplier<KEY> keySupplier                = ...;
 337 Supplier<OUTPUT> memoizedSupplier        = MapMemoize.supplier(supplier, keySupplier);
 338 ----
 339
 340 === Custom cache w/ default cache keys
 341
 342 [source, java]
 343 ----
 344 // memoize in Caffeine cache
 345 Consumer<INPUT> consumer                 = ...;
 346 Cache<INPUT, INPUT> cache                = ...; // com.github.benmanes.caffeine.cache.Cache
 347 Consumer<INPUT> memoizedConsumer         = CaffeineMemoize.consumer(consumer, cache);
 348
 349 // memoize in Guava cache
 350 Function<INPUT, OUTPUT> function         = ...;
 351 Cache<INPUT, OUTPUT> cache               = ...; // com.google.common.cache.Cache
 352 Function<INPUT, OUTPUT> memoizedFunction = GuavaMemoize.function(function, cache);
 353
 354 // memoize in JCache cache
 355 Predicate<INPUT> predicate               = ...;
 356 Cache<INPUT, Boolean> cache              = ...; // javax.cache.Cache
 357 Predicate<INPUT> memoizedPredicate       = JCacheMemoize.predicate(predicate, cache);
 358
 359 // memoize in ConcurrentMap
 360 Supplier<OUTPUT> supplier                = ...;
 361 Map<String, OUTPUT> cache                = ...;
 362 Supplier<OUTPUT> memoizedSupplier        = MapMemoize.supplier(supplier, cache);
 363 ----
 364
 365 === Custom cache w/ custom cache keys
 366
 367 [source, java]
 368 ----
 369 // memoize in Caffeine cache
 370 Consumer<INPUT> consumer                 = ...;
 371 Function<INPUT, KEY> keyFunction         = ...;
 372 Cache<KEY, INPUT> cache                  = ...; // com.github.benmanes.caffeine.cache.Cache
 373 Consumer<INPUT> memoizedConsumer         = CaffeineMemoize.consumer(consumer, keyFunction, cache);
 374
 375 // memoize in Guava cache
 376 Function<INPUT, OUTPUT> function         = ...;
 377 Function<INPUT, KEY> keyFunction         = ...;
 378 Cache<KEY, OUTPUT> cache                 = ...; // com.google.common.cache.Cache
 379 Function<INPUT, OUTPUT> memoizedFunction = GuavaMemoize.function(function, keyFunction, cache);
 380
 381 // memoize in JCache cache
 382 Predicate<INPUT> predicate               = ...;
 383 Function<INPUT, KEY> keyFunction         = ...;
 384 Cache<KEY, Boolean> cache                = ...; // javax.cache.Cache
 385 Predicate<INPUT> memoizedPredicate       = JCacheMemoize.predicate(predicate, keyFunction, cache);
 386
 387 // memoize in ConcurrentMap
 388 Supplier<OUTPUT> supplier                = ...;
 389 Supplier<KEY> keySupplier                = ...;
 390 Map<KEY, OUTPUT> cache                   = ...;
 391 Supplier<OUTPUT> memoizedSupplier        = MapMemoize.supplier(supplier, keySupplier, cache);
 392 ----
 393
 394 === Integration
 395
 396 In order to use this project, declare the following inside your POM:
 397
 398 [source, xml, subs="attributes,verbatim"]
 399 ----
 400 <dependencies>
 401   <dependency>
 402     <groupId>{project-group}</groupId>
 403     <artifactId>memoization-core</artifactId>
 404     <version>${version.memoization}</version>
 405   </dependency>
 406
 407   <!-- CAFFEINE ONLY -->
 408   <dependency>
 409     <groupId>{project-group}</groupId>
 410     <artifactId>memoization-caffeine</artifactId>
 411     <version>${version.memoization}</version>
 412   </dependency>
 413   <dependency>
 414     <groupId>com.github.ben-manes.caffeine</groupId>
 415     <artifactId>caffeine</artifactId>
 416     <version>${version.caffeine}</version>
 417   </dependency>
 418   <!-- CAFFEINE ONLY -->
 419
 420   <!-- GUAVA ONLY -->
 421   <dependency>
 422     <groupId>{project-group}</groupId>
 423     <artifactId>memoization-guava</artifactId>
 424     <version>${version.memoization}</version>
 425   </dependency>
 426   <dependency>
 427     <groupId>com.google.guava</groupId>
 428     <artifactId>guava</artifactId>
 429     <version>${version.guava}</version>
 430   </dependency>
 431   <!-- GUAVA ONLY -->
 432
 433   <!-- JCACHE ONLY -->
 434   <dependency>
 435     <groupId>{project-group}</groupId>
 436     <artifactId>memoization-jcache</artifactId>
 437     <version>${version.memoization}</version>
 438   </dependency>
 439   <dependency>
 440     <groupId>javax.cache</groupId>
 441     <artifactId>cache-api</artifactId>
 442     <version>${version.jcache}</version>
 443   </dependency>
 444   <!-- Add your JCache implementation here -->
 445   <dependency>
 446     <groupId>...</groupId>
 447     <artifactId>...</artifactId>
 448     <version>...</version>
 449   </dependency>
 450   <!-- JCACHE ONLY -->
 451
 452 </dependencies>
 453 ----
 454
 455 Replace `${version.memoization}` with the pass:[<a href="https://search.maven.org/#search%7Cga%7C1%7Cg%3Ade.xn--ho-hia.memoization">latest release</a>]. This project follows the link:http://semver.org/[semantic versioning guidelines].
 456 Popular JCache implementations are link:http://www.ehcache.org/[Ehcache], link:http://commons.apache.org/proper/commons-jcs/[Commons JCS], link:https://hazelcast.org/[Hazelcast], link:http://infinispan.org/[Infinispan], link:https://ignite.apache.org/[Apache Ignite] and link:http://www.alachisoft.com/tayzgrid/[TayzGrid].
 457 Use link:https://github.com/jhalterman/expiringmap[ExpiringMap] and other `ConcurrentMap` implementations as alternatives to the default `ConcurrentHashMap` used in the `MapMemoize` factory.
 458
 459 === Compatibility
 460
 461 This project is compatible with the following Java versions:
 462
 463 .Java compatibility
 464 |===
 465 | | 1.X.Y | 2.X.Y
 466
 467 | Java 8
 468 | ✓
 469 | ✓
 470 |===
 471
 472 == Alternatives
 473
 474 * link:http://www.tek271.com/software/java/memoizer[Tek271 Memoizer]
 475 * link:https://github.com/kelvinguu/gitmemoizer[GitMemoizer]
 476 * link:http://docs.spring.io/spring/docs/current/spring-framework-reference/html/cache.html#cache-annotations-cacheable[Spring's `@Cacheable`]
 477 * link:https://github.com/marmelo/chili#memoize[Chili's `@Memoize`]
 478 * link:https://clojuredocs.org/clojure.core/memoize[Clojure's `(memoize f)`]
 479 * link:http://docs.groovy-lang.org/latest/html/gapi/groovy/transform/Memoized.html[Groovy's `@Memoized`]
 480 * link:https://github.com/cb372/scalacache#memoization-of-method-results[ScalaCache's `memoize`]
 481
 482 == License
 483
 484 To the extent possible under law, the author(s) have dedicated all copyright
 485 and related and neighboring rights to this software to the public domain
 486 worldwide. This software is distributed without any warranty.
 487
 488 You should have received a copy of the CC0 Public Domain Dedication along
 489 with this software. If not, see http://creativecommons.org/publicdomain/zero/1.0/.
 490
 491 == Mirrors
 492
 493 * https://github.com/sebhoss/memoization.java
 494 * https://bitbucket.org/sebhoss/memoization.java
 495 * https://gitlab.com/sebastian.hoss/memoization.java
 496 * http://v2.pikacode.com/sebhoss/memoization.java
 497 * http://repo.or.cz/memoization.java.git