HazelcastでCache（JCache）の設定をする

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data-publication-type="entry"> <div class="entry-inner"> <header class="entry-header"> <div class="date entry-date first"> <a href="https://kazuhira-r.hatenablog.com/archive/2015/02/28" rel="nofollow"> <time datetime="2015-02-28T04:49:06Z" title="2015-02-28T04:49:06Z"> <span class="date-year">2015</span><span class="hyphen">-</span><span class="date-month">02</span><span class="hyphen">-</span><span class="date-day">28</span> </time> </a> </div> <h1 class="entry-title"> <a href="https://kazuhira-r.hatenablog.com/entry/20150228/1425098946" class="entry-title-link bookmark">HazelcastでCache（JCache）の設定をする</a> </h1> <div class="entry-categories categories"> <a href="https://kazuhira-r.hatenablog.com/archive/category/Hazelcast" class="entry-category-link category-Hazelcast">Hazelcast</a> <a href="https://kazuhira-r.hatenablog.com/archive/category/JCache" class="entry-category-link category-JCache">JCache</a> </div> </header> <div class="entry-content hatenablog-entry"> <p>Hazelcast 3.4から、設定ファイルでCacheの設定ができるようになりました。これにより、JCacheの設定がJCacheのMutableConfigurationではなく、Hazelcastの設定ファイルで定義できるようになります。</p><p>JCache Configuration<br /> <a href="http://docs.hazelcast.org/docs/3.4/manual/html-single/hazelcast-documentation.html#jcache-configuration">http://docs.hazelcast.org/docs/3.4/manual/html-single/hazelcast-documentation.html#jcache-configuration</a></p><p>設定できるのは、このあたりです。</p> <ul> <li>定義するCacheの名前</li> <li>キーのClass名</li> <li>値のClass名</li> <li><a class="keyword" href="http://d.hatena.ne.jp/keyword/JMX">JMX</a>統計情報収集、提供の有効／無効</li> <li>Read-Through、Write-Throughの有効／無効</li> <li>CacheLoader、CacheWriter、ExpirePolicyに対するファクトリの設定</li> <li>EntryListenerの設定</li> </ul><p>また、HazelcastのCacheの設定として、以下も可能なようです。</p><p>ICache Configuration<br /> <a href="http://docs.hazelcast.org/docs/3.4/manual/html-single/hazelcast-documentation.html#icache-configuration">http://docs.hazelcast.org/docs/3.4/manual/html-single/hazelcast-documentation.html#icache-configuration</a></p><p>こっちは、「I」Cacheですね。バックアップ数や、メモリ内でのエントリの持ち方（<a class="keyword" href="http://d.hatena.ne.jp/keyword/%A5%B7%A5%EA%A5%A2%A5%E9%A5%A4%A5%BA">シリアライズ</a> or 参照）、Evictionを設定します。</p><p>で、これらの一部をHazelcast 3.4で軽く試そうと思っていたのですが、バグがあったりしてうまく動かなかったので、最近リリースされた3.4.1まで待っていました。</p><p>まあ、これでも不思議なところはありますが。</p><p>では、使っていってみましょう。</p> <div class="section"> <h4><a class="keyword" href="http://d.hatena.ne.jp/keyword/Maven">Maven</a>依存関係</h4> <p><a class="keyword" href="http://d.hatena.ne.jp/keyword/Maven">Maven</a>依存関係の定義で必要なのは、JCacheとHazelcast自身ですね。</p> <pre class="code lang-xml" data-lang="xml" data-unlink> <span class="synIdentifier"><dependency></span> <span class="synIdentifier"><groupId></span>javax.cache<span class="synIdentifier"></groupId></span> <span class="synIdentifier"><artifactId></span>cache-api<span class="synIdentifier"></artifactId></span> <span class="synIdentifier"><version></span>1.0.0<span class="synIdentifier"></version></span> <span class="synIdentifier"></dependency></span> <span class="synIdentifier"><dependency></span> <span class="synIdentifier"><groupId></span>com.hazelcast<span class="synIdentifier"></groupId></span> <span class="synIdentifier"><artifactId></span>hazelcast<span class="synIdentifier"></artifactId></span> <span class="synIdentifier"><version></span>3.4.1<span class="synIdentifier"></version></span> <span class="synIdentifier"></dependency></span> </pre><p>今回は、Server Providerを使用します。</p> </div> <div class="section"> <h4>Hazelcastの設定ファイルで、JCacheの設定をする</h4> <div class="section"> <h5>設定ファイルの用意</h5> <p>それでは、Hazelcastの設定ファイルを作成します。<br /> src/test/resources/hazelcast.<a class="keyword" href="http://d.hatena.ne.jp/keyword/xml">xml</a></p> <pre class="code lang-xml" data-lang="xml" data-unlink><span class="synComment"><?</span><span class="synType">xml version</span>=<span class="synConstant">"1.0"</span><span class="synType"> encoding</span>=<span class="synConstant">"UTF-8"</span><span class="synComment">?></span> <span class="synIdentifier"><hazelcast </span><span class="synType">xsi</span><span class="synComment">:</span><span class="synType">schemaLocation</span>=<span class="synConstant">"http://www.hazelcast.com/schema/config hazelcast-config-3.4.xsd"</span> <span class="synIdentifier"> </span><span class="synType">xmlns</span>=<span class="synConstant">"http://www.hazelcast.com/schema/config"</span> <span class="synIdentifier"> </span><span class="synType">xmlns</span><span class="synComment">:</span><span class="synType">xsi</span>=<span class="synConstant">"http://www.w3.org/2001/XMLSchema-instance"</span><span class="synIdentifier">></span> <span class="synIdentifier"><group></span> <span class="synIdentifier"><name></span>my-cluster<span class="synIdentifier"></name></span> <span class="synIdentifier"><password></span>my-cluster-password<span class="synIdentifier"></password></span> <span class="synIdentifier"></group></span> <span class="synIdentifier"><network></span> <span class="synIdentifier"><port </span><span class="synType">auto-increment</span>=<span class="synConstant">"true"</span><span class="synIdentifier"> </span><span class="synType">port-count</span>=<span class="synConstant">"100"</span><span class="synIdentifier">></span>5701<span class="synIdentifier"></port></span> <span class="synIdentifier"><join></span> <span class="synIdentifier"><multicast </span><span class="synType">enabled</span>=<span class="synConstant">"true"</span><span class="synIdentifier">></span> <span class="synIdentifier"><multicast-group></span>224.2.2.3<span class="synIdentifier"></multicast-group></span> <span class="synIdentifier"><multicast-port></span>54327<span class="synIdentifier"></multicast-port></span> <span class="synIdentifier"></multicast></span> <span class="synIdentifier"><tcp-ip </span><span class="synType">enabled</span>=<span class="synConstant">"false"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"></join></span> <span class="synIdentifier"></network></span> <span class="synIdentifier"><cache </span><span class="synType">name</span>=<span class="synConstant">"simple-cache"</span><span class="synIdentifier">></span> <span class="synIdentifier"><key-type </span><span class="synType">class-name</span>=<span class="synConstant">"java.lang.String"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"><value-type </span><span class="synType">class-name</span>=<span class="synConstant">"java.lang.String"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"></cache></span> <span class="synIdentifier"><cache </span><span class="synType">name</span>=<span class="synConstant">"with-eviction-cache"</span><span class="synIdentifier">></span> <span class="synIdentifier"><key-type </span><span class="synType">class-name</span>=<span class="synConstant">"java.lang.String"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"><value-type </span><span class="synType">class-name</span>=<span class="synConstant">"java.lang.String"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"><eviction </span><span class="synType">size</span>=<span class="synConstant">"5"</span><span class="synIdentifier"> </span><span class="synType">max-size-policy</span>=<span class="synConstant">"ENTRY_COUNT"</span><span class="synIdentifier"> </span><span class="synType">eviction-policy</span>=<span class="synConstant">"LRU"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"></cache></span> <span class="synIdentifier"><cache </span><span class="synType">name</span>=<span class="synConstant">"with-expire-cache"</span><span class="synIdentifier">></span> <span class="synIdentifier"><key-type </span><span class="synType">class-name</span>=<span class="synConstant">"java.lang.String"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"><value-type </span><span class="synType">class-name</span>=<span class="synConstant">"java.lang.String"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"><eviction </span><span class="synType">size</span>=<span class="synConstant">"5"</span><span class="synIdentifier"> </span><span class="synType">max-size-policy</span>=<span class="synConstant">"ENTRY_COUNT"</span><span class="synIdentifier"> </span><span class="synType">eviction-policy</span>=<span class="synConstant">"LRU"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"><expiry-policy-factory </span><span class="synType">class-name</span>=<span class="synConstant">"org.littlewings.hazelcast.jcache.MyExpiryFactory"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"></cache></span> <span class="synIdentifier"></hazelcast></span> </pre><p>簡単ですが、キーと値のClassだけを定義したCache、Evictionの設定をしたCache、EvictionとExpireの設定をしたCacheの3つを用意しました。</p><p>注）<br /> max-size-policyはドキュメントの<a class="keyword" href="http://d.hatena.ne.jp/keyword/XML">XML</a>例はENTRY-COUNTですが、正しいのはENTRY_COUNTです。Pull Req送ったりしたり、開発者に指摘して<a class="keyword" href="http://d.hatena.ne.jp/keyword/GitHub">GitHub</a> master上は直っているので、そのうち反映されるでしょう。</p><p>このファイルですが、「hazelcast.<a class="keyword" href="http://d.hatena.ne.jp/keyword/xml">xml</a>」という名前でクラスパス上にあることが重要です（ClientProviderの場合は、hazelcast-client.<a class="keyword" href="http://d.hatena.ne.jp/keyword/xml">xml</a>）。要はHazelcastの設定ファイルのデフォルトの名前なのですが。</p><p>なお、ExpiryFactoryは自分で実装しました。このようなものを用意しています。<br /> src/main/<a class="keyword" href="http://d.hatena.ne.jp/keyword/java">java</a>/org/littlewings/hazelcast/jcache/MyExpiryFactory.<a class="keyword" href="http://d.hatena.ne.jp/keyword/java">java</a></p> <pre class="code lang-java" data-lang="java" data-unlink><span class="synPreProc">package</span> org.littlewings.hazelcast.jcache; <span class="synPreProc">import</span> java.util.concurrent.TimeUnit; <span class="synPreProc">import</span> javax.cache.configuration.Factory; <span class="synPreProc">import</span> javax.cache.expiry.Duration; <span class="synPreProc">import</span> javax.cache.expiry.ExpiryPolicy; <span class="synPreProc">import</span> javax.cache.expiry.TouchedExpiryPolicy; <span class="synType">public</span> <span class="synType">class</span> MyExpiryFactory <span class="synType">implements</span> Factory<ExpiryPolicy> { <span class="synPreProc">@Override</span> <span class="synType">public</span> ExpiryPolicy create() { <span class="synStatement">return</span> <span class="synStatement">new</span> TouchedExpiryPolicy(<span class="synStatement">new</span> Duration(TimeUnit.SECONDS, <span class="synConstant">5</span>)); } } </pre><p>JCacheのFactoryを実装したクラスで、ここではExpiryPolicyを返すようにしています。PolicyはTouched（Cacheへのアクセス、エントリの更新で有効期限が延びる）、有効期限は5秒としました。</p> </div> <div class="section"> <h5>使ってみる</h5> <p>それでは、テストコードを書いて試していってみましょう。ここからのコードは、以下のimport文が書かれているものとします。</p> <pre class="code lang-java" data-lang="java" data-unlink><span class="synPreProc">import static</span> org.assertj.core.api.Assertions.*; <span class="synPreProc">import</span> java.util.concurrent.TimeUnit; <span class="synPreProc">import</span> java.util.stream.IntStream; <span class="synPreProc">import</span> javax.cache.Cache; <span class="synPreProc">import</span> javax.cache.CacheManager; <span class="synPreProc">import</span> javax.cache.Caching; <span class="synPreProc">import</span> javax.cache.spi.CachingProvider; <span class="synPreProc">import</span> org.junit.Test; </pre><p>キーと値のClassクラスを定義したCacheの利用。</p> <pre class="code lang-java" data-lang="java" data-unlink> CachingProvider provider = Caching.getCachingProvider(); CacheManager manager = provider.getCacheManager(); Cache<String, String> cache = manager.getCache(<span class="synConstant">"simple-cache"</span>, String.<span class="synType">class</span>, String.<span class="synType">class</span>); IntStream.rangeClosed(<span class="synConstant">1</span>, <span class="synConstant">5</span>).forEach(i<span class="synError"> -></span> cache.put(<span class="synConstant">"key"</span> + i, <span class="synConstant">"value"</span> + i)); assertThat(cache.get(<span class="synConstant">"key1"</span>)) .isEqualTo(<span class="synConstant">"value1"</span>); assertThat(cache.get(<span class="synConstant">"key5"</span>)) .isEqualTo(<span class="synConstant">"value5"</span>); assertThat(cache.get(<span class="synConstant">"key10"</span>)) .isNull(); cache.close(); manager.close(); provider.close(); </pre><p>通常、JCacheを使う時はMutableConfigurationを使ってCacheManager#createCacheしてCacheを定義するのですが、ここでは事前定義済みのCacheを取得できています。</p> <pre class="code lang-java" data-lang="java" data-unlink> Cache<String, String> cache = manager.getCache(<span class="synConstant">"simple-cache"</span>, String.<span class="synType">class</span>, String.<span class="synType">class</span>); </pre><p>もしも定義できていなかった場合は、ここでの戻り値はnullになります。キーと値の型を特定しなかったりすると、例外が飛ぶようですが…。</p><p>Evictionの確認。</p> <pre class="code lang-java" data-lang="java" data-unlink> CachingProvider provider = Caching.getCachingProvider(); CacheManager manager = provider.getCacheManager(); Cache<String, String> cache = manager.getCache(<span class="synConstant">"with-eviction-cache"</span>, String.<span class="synType">class</span>, String.<span class="synType">class</span>); com.hazelcast.cache.ICache<String, String> icache = cache.unwrap(com.hazelcast.cache.ICache.<span class="synType">class</span>); com.hazelcast.config.CacheConfig config = icache.getConfiguration(com.hazelcast.config.CacheConfig.<span class="synType">class</span>); assertThat(config.getEvictionConfig().getSize()) .isEqualTo(<span class="synConstant">5</span>); <span class="synComment">// right</span> IntStream.rangeClosed(<span class="synConstant">1</span>, <span class="synConstant">30</span>).forEach(i<span class="synError"> -></span> cache.put(<span class="synConstant">"key"</span> + i, <span class="synConstant">"value"</span> + i)); <span class="synType">int</span> count = <span class="synConstant">0</span>; <span class="synStatement">for</span> (Cache.Entry<String, String> entry : cache) { count++; } assertThat(count) .isGreaterThan(<span class="synConstant">25</span>); <span class="synComment">// much larger than ENTRY_COUNT??</span> cache.close(); manager.close(); provider.close(); </pre><p>なんか、普通に要<a class="keyword" href="http://d.hatena.ne.jp/keyword/%C1%C7%BF%F4">素数</a>がオー<a class="keyword" href="http://d.hatena.ne.jp/keyword/%A5%D0%A1%BC">バー</a>していますね…。なんか使い方悪いのかなぁ…。<a class="keyword" href="http://d.hatena.ne.jp/keyword/%A4%B7%A4%AD%A4%A4%C3%CD">しきい値</a>から多少ブレるくらいだったら、そんなものかなぁと思うのですが。これはちょっとまた後で。</p><p>続いて、Expireの確認。</p> <pre class="code lang-java" data-lang="java" data-unlink> CachingProvider provider = Caching.getCachingProvider(); CacheManager manager = provider.getCacheManager(); Cache<String, String> cache = manager.getCache(<span class="synConstant">"with-expire-cache"</span>, String.<span class="synType">class</span>, String.<span class="synType">class</span>); IntStream.rangeClosed(<span class="synConstant">1</span>, <span class="synConstant">5</span>).forEach(i<span class="synError"> -></span> cache.put(<span class="synConstant">"key"</span> + i, <span class="synConstant">"value"</span> + i)); TimeUnit.SECONDS.sleep(<span class="synConstant">3</span>); cache.get(<span class="synConstant">"key1"</span>); cache.get(<span class="synConstant">"key3"</span>); TimeUnit.SECONDS.sleep(<span class="synConstant">3</span>); assertThat(cache.get(<span class="synConstant">"key1"</span>)) .isEqualTo(<span class="synConstant">"value1"</span>); assertThat(cache.get(<span class="synConstant">"key3"</span>)) .isEqualTo(<span class="synConstant">"value3"</span>); assertThat(cache.get(<span class="synConstant">"key2"</span>)) .isNull(); assertThat(cache.get(<span class="synConstant">"key4"</span>)) .isNull(); TimeUnit.SECONDS.sleep(<span class="synConstant">6</span>); assertThat(cache.get(<span class="synConstant">"key1"</span>)) .isNull(); assertThat(cache.get(<span class="synConstant">"key3"</span>)) .isNull(); cache.close(); manager.close(); provider.close(); </pre><p>こちらは、違和感なく使えてそうです。</p><p>で、先ほどのEvictionなのですが、ここを見る限りExpireと組み合わせた方がわかりやすい動きするのかなぁと思って試してみたのですが。</p><p>JCache Eviction<br /> <a href="http://docs.hazelcast.org/docs/3.4/manual/html-single/hazelcast-documentation.html#jcache-eviction">http://docs.hazelcast.org/docs/3.4/manual/html-single/hazelcast-documentation.html#jcache-eviction</a></p><p>Expireと組み合わせて確認。</p> <pre class="code lang-java" data-lang="java" data-unlink> CachingProvider provider = Caching.getCachingProvider(); CacheManager manager = provider.getCacheManager(); Cache<String, String> cache = manager.getCache(<span class="synConstant">"with-expire-cache"</span>, String.<span class="synType">class</span>, String.<span class="synType">class</span>); IntStream.rangeClosed(<span class="synConstant">1</span>, <span class="synConstant">30</span>).forEach(i<span class="synError"> -></span> cache.put(<span class="synConstant">"key"</span> + i, <span class="synConstant">"value"</span> + i)); TimeUnit.SECONDS.sleep(<span class="synConstant">3</span>); cache.get(<span class="synConstant">"key1"</span>); cache.get(<span class="synConstant">"key3"</span>); cache.get(<span class="synConstant">"key5"</span>); cache.get(<span class="synConstant">"key10"</span>); cache.get(<span class="synConstant">"key13"</span>); cache.get(<span class="synConstant">"key15"</span>); cache.get(<span class="synConstant">"key20"</span>); cache.get(<span class="synConstant">"key25"</span>); TimeUnit.SECONDS.sleep(<span class="synConstant">3</span>); <span class="synType">int</span> count = <span class="synConstant">0</span>; <span class="synStatement">for</span> (Cache.Entry<String, String> entry : cache) { count++; } assertThat(count) .isLessThanOrEqualTo(<span class="synConstant">8</span>); cache.close(); manager.close(); provider.close(); </pre><p>そんなに動きが変わった気がしません…。どうなのだろう？？</p> </div> </div> <div class="section"> <h4>「hazelcast.<a class="keyword" href="http://d.hatena.ne.jp/keyword/xml">xml</a>」以外の名前で設定ファイルを指定する</h4> <p>上記までのコードでは、デフォルトのHazelcastの設定ファイルを読むため、「hazelcast.<a class="keyword" href="http://d.hatena.ne.jp/keyword/xml">xml</a>」（ClientProviderの場合は「hazelcast-client.<a class="keyword" href="http://d.hatena.ne.jp/keyword/xml">xml</a>」）の設定ファイル名がどこにも登場しませんが、これを設定することもできるようです。</p><p>Scopes and Namespaces<br /> <a href="http://docs.hazelcast.org/docs/3.4/manual/html-single/hazelcast-documentation.html#scopes-and-namespaces">http://docs.hazelcast.org/docs/3.4/manual/html-single/hazelcast-documentation.html#scopes-and-namespaces</a></p><p>3.3.1の時から、ホントにだいぶ変わりましたねぇ。</p><p>Hazelcastの設定ファイル名をデフォルト以外の名前にするには、<a class="keyword" href="http://d.hatena.ne.jp/keyword/java">java</a>.util.Propertiesを使うようです。</p><p>今度は、先ほどと同じ設定ファイルを、「my-hazelcast.<a class="keyword" href="http://d.hatena.ne.jp/keyword/xml">xml</a>」という名前で作ってみます。<br /> src/test/resources/my-hazelcast.<a class="keyword" href="http://d.hatena.ne.jp/keyword/xml">xml</a></p> <pre class="code lang-xml" data-lang="xml" data-unlink><span class="synComment"><?</span><span class="synType">xml version</span>=<span class="synConstant">"1.0"</span><span class="synType"> encoding</span>=<span class="synConstant">"UTF-8"</span><span class="synComment">?></span> <span class="synIdentifier"><hazelcast </span><span class="synType">xsi</span><span class="synComment">:</span><span class="synType">schemaLocation</span>=<span class="synConstant">"http://www.hazelcast.com/schema/config hazelcast-config-3.4.xsd"</span> <span class="synIdentifier"> </span><span class="synType">xmlns</span>=<span class="synConstant">"http://www.hazelcast.com/schema/config"</span> <span class="synIdentifier"> </span><span class="synType">xmlns</span><span class="synComment">:</span><span class="synType">xsi</span>=<span class="synConstant">"http://www.w3.org/2001/XMLSchema-instance"</span><span class="synIdentifier">></span> <span class="synIdentifier"><group></span> <span class="synIdentifier"><name></span>my-cluster<span class="synIdentifier"></name></span> <span class="synIdentifier"><password></span>my-cluster-password<span class="synIdentifier"></password></span> <span class="synIdentifier"></group></span> <span class="synIdentifier"><network></span> <span class="synIdentifier"><port </span><span class="synType">auto-increment</span>=<span class="synConstant">"true"</span><span class="synIdentifier"> </span><span class="synType">port-count</span>=<span class="synConstant">"100"</span><span class="synIdentifier">></span>5701<span class="synIdentifier"></port></span> <span class="synIdentifier"><join></span> <span class="synIdentifier"><multicast </span><span class="synType">enabled</span>=<span class="synConstant">"true"</span><span class="synIdentifier">></span> <span class="synIdentifier"><multicast-group></span>224.2.2.3<span class="synIdentifier"></multicast-group></span> <span class="synIdentifier"><multicast-port></span>54327<span class="synIdentifier"></multicast-port></span> <span class="synIdentifier"></multicast></span> <span class="synIdentifier"><tcp-ip </span><span class="synType">enabled</span>=<span class="synConstant">"false"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"></join></span> <span class="synIdentifier"></network></span> <span class="synIdentifier"><cache </span><span class="synType">name</span>=<span class="synConstant">"simple-cache"</span><span class="synIdentifier">></span> <span class="synIdentifier"><key-type </span><span class="synType">class-name</span>=<span class="synConstant">"java.lang.String"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"><value-type </span><span class="synType">class-name</span>=<span class="synConstant">"java.lang.String"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"></cache></span> <span class="synIdentifier"><cache </span><span class="synType">name</span>=<span class="synConstant">"with-eviction-cache"</span><span class="synIdentifier">></span> <span class="synIdentifier"><key-type </span><span class="synType">class-name</span>=<span class="synConstant">"java.lang.String"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"><value-type </span><span class="synType">class-name</span>=<span class="synConstant">"java.lang.String"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"><eviction </span><span class="synType">size</span>=<span class="synConstant">"5"</span><span class="synIdentifier"> </span><span class="synType">max-size-policy</span>=<span class="synConstant">"ENTRY_COUNT"</span><span class="synIdentifier"> </span><span class="synType">eviction-policy</span>=<span class="synConstant">"LRU"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"></cache></span> <span class="synIdentifier"><cache </span><span class="synType">name</span>=<span class="synConstant">"with-expire-cache"</span><span class="synIdentifier">></span> <span class="synIdentifier"><key-type </span><span class="synType">class-name</span>=<span class="synConstant">"java.lang.String"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"><value-type </span><span class="synType">class-name</span>=<span class="synConstant">"java.lang.String"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"><eviction </span><span class="synType">size</span>=<span class="synConstant">"5"</span><span class="synIdentifier"> </span><span class="synType">max-size-policy</span>=<span class="synConstant">"ENTRY_COUNT"</span><span class="synIdentifier"> </span><span class="synType">eviction-policy</span>=<span class="synConstant">"LRU"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"><expiry-policy-factory </span><span class="synType">class-name</span>=<span class="synConstant">"org.littlewings.hazelcast.jcache.MyExpiryFactory"</span><span class="synIdentifier"> /></span> <span class="synIdentifier"></cache></span> <span class="synIdentifier"></hazelcast></span> </pre><p>また、テストコードのimport文には以下を追加します。</p> <pre class="code lang-java" data-lang="java" data-unlink><span class="synPreProc">import</span> com.hazelcast.cache.HazelcastCachingProvider; </pre><p>先ほどのテストコードから変わるところですが、まずHazelcastCachingProvider.HAZELCAST_CONFIG_LOCATIONをキーに、設定ファイルの場所を値にしたPropertiesを作成します。</p> <pre class="code lang-java" data-lang="java" data-unlink> Properties properties = <span class="synStatement">new</span> Properties(); properties.setProperty(HazelcastCachingProvider.HAZELCAST_CONFIG_LOCATION, <span class="synConstant">"classpath:my-hazelcast.xml"</span>); </pre><p>設定ファイルの場所の指定は、クラスパス（<a class="keyword" href="http://d.hatena.ne.jp/keyword/classpath">classpath</a>）、そして<a class="keyword" href="http://d.hatena.ne.jp/keyword/%A5%D5%A5%A1%A5%A4%A5%EB%A5%B7%A5%B9%A5%C6%A5%E0">ファイルシステム</a>（file:///）のように<a class="keyword" href="http://d.hatena.ne.jp/keyword/URI">URI</a>として渡せるものが利用できます。</p><p>クラスパスの指定ですが、ドキュメント上は「<a class="keyword" href="http://d.hatena.ne.jp/keyword/classpath">classpath</a>://」と書かれていますが、「//」があると動きませんでしたけれど…。</p><p>また、これの省略形として以下の記述もOKです。</p> <pre class="code lang-java" data-lang="java" data-unlink> Properties properties = HazelcastCachingProvider.propertiesByLocation(<span class="synConstant">"classpath:my-hazelcast.xml"</span>); </pre><p>次に、CacheManagerの取得方法が変わります。作成したPropertiesを、CachingProvider#getCacheCacheManagerの第3引数に渡します。</p> <pre class="code lang-java" data-lang="java" data-unlink> CachingProvider provider = Caching.getCachingProvider(); CacheManager manager = provider.getCacheManager(URI.create(<span class="synConstant">"my-cache-manager"</span>), <span class="synConstant">null</span>, properties); </pre><p>ここで、CachingProvider#getCacheCacheManagerの第1引数はCacheManagerの管理スコープを分けるための<a class="keyword" href="http://d.hatena.ne.jp/keyword/URI">URI</a>、第2引数はClassLoaderで、それぞれnullを指定するとデフォルトのものを使おうとします。</p><p>ただ、このように設定ファイルを自分で指定する使い方の場合は、<span class="deco" style="font-weight:bold;"><a class="keyword" href="http://d.hatena.ne.jp/keyword/URI">URI</a>を指定することがすごく重要で</span>これを指定しないと指定した設定ファイルそのものは認識するのですが、その後でデフォルト設定のHazelcast<a class="keyword" href="http://d.hatena.ne.jp/keyword/%A5%A4%A5%F3%A5%B9%A5%BF%A5%F3%A5%B9">インスタンス</a>を起動しようとします…。</p><p>同一JavaVMにHazelcast<a class="keyword" href="http://d.hatena.ne.jp/keyword/%A5%A4%A5%F3%A5%B9%A5%BF%A5%F3%A5%B9">インスタンス</a>が2つ起動しようとする状態になって、さらにCacheManager#getCacheする時は自分が指定された設定ファイルで構築されたHazelcast<a class="keyword" href="http://d.hatena.ne.jp/keyword/%A5%A4%A5%F3%A5%B9%A5%BF%A5%F3%A5%B9">インスタンス</a>は使われません。ここ、最初にハマりました…。なお、CachingProvider#getDefaultURIで取得できる値を渡しても、たぶんHazelcast<a class="keyword" href="http://d.hatena.ne.jp/keyword/%A5%A4%A5%F3%A5%B9%A5%BF%A5%F3%A5%B9">インスタンス</a>が2つ起動する結果になる（nullを渡した時と同じになる）と思います。</p><p>ここまで書いておいて注意ですが、この話は「HazelcastのJCache実装での挙動」のみに言及しています。他のJCacheの実装では、事情が異なると思います。</p><p>あとは、普通に使うだけです。</p><p>Propertiesから作成する例。</p> <pre class="code lang-java" data-lang="java" data-unlink> Properties properties = <span class="synStatement">new</span> Properties(); properties.setProperty(HazelcastCachingProvider.HAZELCAST_CONFIG_LOCATION, <span class="synConstant">"classpath:my-hazelcast.xml"</span>); CachingProvider provider = Caching.getCachingProvider(); CacheManager manager = provider.getCacheManager(URI.create(<span class="synConstant">"my-cache-manager"</span>), <span class="synConstant">null</span>, properties); Cache<String, String> cache = manager.getCache(<span class="synConstant">"simple-cache"</span>, String.<span class="synType">class</span>, String.<span class="synType">class</span>); IntStream.rangeClosed(<span class="synConstant">1</span>, <span class="synConstant">5</span>).forEach(i<span class="synError"> -></span> cache.put(<span class="synConstant">"key"</span> + i, <span class="synConstant">"value"</span> + i)); assertThat(cache.get(<span class="synConstant">"key1"</span>)) .isEqualTo(<span class="synConstant">"value1"</span>); assertThat(cache.get(<span class="synConstant">"key5"</span>)) .isEqualTo(<span class="synConstant">"value5"</span>); assertThat(cache.get(<span class="synConstant">"key10"</span>)) .isNull(); cache.close(); manager.close(); provider.close(); </pre><p>HazelcastCachingProvider#propertiesByLocationを使用した例。</p> <pre class="code lang-java" data-lang="java" data-unlink> Properties properties = HazelcastCachingProvider.propertiesByLocation(<span class="synConstant">"classpath:my-hazelcast.xml"</span>); CachingProvider provider = Caching.getCachingProvider(); CacheManager manager = provider.getCacheManager(URI.create(<span class="synConstant">"my-cache-manager"</span>), <span class="synConstant">null</span>, properties); Cache<String, String> cache = manager.getCache(<span class="synConstant">"with-expire-cache"</span>, String.<span class="synType">class</span>, String.<span class="synType">class</span>); IntStream.rangeClosed(<span class="synConstant">1</span>, <span class="synConstant">5</span>).forEach(i<span class="synError"> -></span> cache.put(<span class="synConstant">"key"</span> + i, <span class="synConstant">"value"</span> + i)); TimeUnit.SECONDS.sleep(<span class="synConstant">3</span>); cache.get(<span class="synConstant">"key1"</span>); cache.get(<span class="synConstant">"key3"</span>); TimeUnit.SECONDS.sleep(<span class="synConstant">3</span>); assertThat(cache.get(<span class="synConstant">"key1"</span>)) .isEqualTo(<span class="synConstant">"value1"</span>); assertThat(cache.get(<span class="synConstant">"key3"</span>)) .isEqualTo(<span class="synConstant">"value3"</span>); assertThat(cache.get(<span class="synConstant">"key2"</span>)) .isNull(); assertThat(cache.get(<span class="synConstant">"key4"</span>)) .isNull(); TimeUnit.SECONDS.sleep(<span class="synConstant">6</span>); assertThat(cache.get(<span class="synConstant">"key1"</span>)) .isNull(); assertThat(cache.get(<span class="synConstant">"key3"</span>)) .isNull(); cache.close(); manager.close(); provider.close(); </pre><p>今回のコード例では、CacheManagerを取得しているところを変えれば「hazelcast.<a class="keyword" href="http://d.hatena.ne.jp/keyword/xml">xml</a>」を使っていた時のコードがそのまま動きます。設定ファイルの置き場所を変えただけなので、そりゃあそうだという話ですが。</p><p>ただ、挙動がわかりにくかったりするのですが…どうなんでしょう？</p><p>今回作成したコードは、こちらに置いています。</p><p><a href="https://github.com/kazuhira-r/hazelcast-examples/tree/master/hazelcast-jcache-configuration">https://github.com/kazuhira-r/hazelcast-examples/tree/master/hazelcast-jcache-configuration</a></p> </div> </div> <footer class="entry-footer"> <div class="entry-tags-wrapper"> <div class="entry-tags"> </div> </div> <p class="entry-footer-section track-inview-by-gtm" data-gtm-track-json="{"area": "finish_reading"}"> <span class="author vcard"><span class="fn" data-load-nickname="1" data-user-name="Kazuhira" >Kazuhira</span></span> <span class="entry-footer-time"><a href="https://kazuhira-r.hatenablog.com/entry/20150228/1425098946"><time data-relative datetime="2015-02-28T04:49:06Z" title="2015-02-28T04:49:06Z" class="updated">2015-02-28 13:49</time></a></span> <span class=" entry-footer-subscribe " 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class="archive-module-month-title archive-module-month-2018-7"> 2018 / 7 </a> </li> <li class="archive-module-month"> <a href="https://kazuhira-r.hatenablog.com/archive/2018/06" class="archive-module-month-title archive-module-month-2018-6"> 2018 / 6 </a> </li> <li class="archive-module-month"> <a href="https://kazuhira-r.hatenablog.com/archive/2018/05" class="archive-module-month-title archive-module-month-2018-5"> 2018 / 5 </a> </li> <li class="archive-module-month"> <a href="https://kazuhira-r.hatenablog.com/archive/2018/04" class="archive-module-month-title archive-module-month-2018-4"> 2018 / 4 </a> </li> <li class="archive-module-month"> <a href="https://kazuhira-r.hatenablog.com/archive/2018/03" class="archive-module-month-title archive-module-month-2018-3"> 2018 / 3 </a> </li> <li class="archive-module-month"> <a href="https://kazuhira-r.hatenablog.com/archive/2018/02" class="archive-module-month-title archive-module-month-2018-2"> 2018 / 2 </a> </li> <li 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