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| <h2 title="Interface CacheLoader" class="title">Interface CacheLoader<K,V></h2> |
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| <dl><dt><span class="strong">Type Parameters:</span></dt><dd><code>K</code> - the type of keys handled by this loader</dd><dd><code>V</code> - the type of values generated by this loader</dd></dl> |
| <hr> |
| <br> |
| <pre>public interface <span class="strong">CacheLoader<K,V></span></pre> |
| <div class="block">Used when a cache is read-through or when loading data into a cache via the |
| <a href="../../../javax/cache/Cache.html#loadAll(java.util.Set, boolean, javax.cache.integration.CompletionListener)"><code>Cache.loadAll(java.util.Set, boolean, |
| CompletionListener)</code></a> method.</div> |
| <dl><dt><span class="strong">Since:</span></dt> |
| <dd>1.0</dd> |
| <dt><span class="strong">Author:</span></dt> |
| <dd>Greg Luck, Yannis Cosmadopoulos</dd> |
| <dt><span class="strong">See Also:</span></dt><dd><a href="../../../javax/cache/configuration/CompleteConfiguration.html#isReadThrough()"><code>CompleteConfiguration.isReadThrough()</code></a>, |
| <a href="../../../javax/cache/integration/CacheWriter.html" title="interface in javax.cache.integration"><code>CacheWriter</code></a></dd></dl> |
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| <td class="colFirst"><code><a href="../../../javax/cache/integration/CacheLoader.html" title="type parameter in CacheLoader">V</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../javax/cache/integration/CacheLoader.html#load(K)">load</a></strong>(<a href="../../../javax/cache/integration/CacheLoader.html" title="type parameter in CacheLoader">K</a> key)</code> |
| <div class="block">Loads an object.</div> |
| </td> |
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| <td class="colFirst"><code><a href="http://download.oracle.com/javase/6/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="../../../javax/cache/integration/CacheLoader.html" title="type parameter in CacheLoader">K</a>,<a href="../../../javax/cache/integration/CacheLoader.html" title="type parameter in CacheLoader">V</a>></code></td> |
| <td class="colLast"><code><strong><a href="../../../javax/cache/integration/CacheLoader.html#loadAll(java.lang.Iterable)">loadAll</a></strong>(<a href="http://download.oracle.com/javase/6/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a><? extends <a href="../../../javax/cache/integration/CacheLoader.html" title="type parameter in CacheLoader">K</a>> keys)</code> |
| <div class="block">Loads multiple objects.</div> |
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| <h4>load</h4> |
| <pre><a href="../../../javax/cache/integration/CacheLoader.html" title="type parameter in CacheLoader">V</a> load(<a href="../../../javax/cache/integration/CacheLoader.html" title="type parameter in CacheLoader">K</a> key) |
| throws <a href="../../../javax/cache/integration/CacheLoaderException.html" title="class in javax.cache.integration">CacheLoaderException</a></pre> |
| <div class="block">Loads an object. Application developers should implement this |
| method to customize the loading of a value for a cache entry. This method |
| is called by a cache when a requested entry is not in the cache. If |
| the object can't be loaded <code>null</code> should be returned.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - the key identifying the object being loaded</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>The value for the entry that is to be stored in the cache or |
| <code>null</code> if the object can't be loaded</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../javax/cache/integration/CacheLoaderException.html" title="class in javax.cache.integration">CacheLoaderException</a></code> - if there is problem executing the loader.</dd></dl> |
| </li> |
| </ul> |
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| <h4>loadAll</h4> |
| <pre><a href="http://download.oracle.com/javase/6/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a><<a href="../../../javax/cache/integration/CacheLoader.html" title="type parameter in CacheLoader">K</a>,<a href="../../../javax/cache/integration/CacheLoader.html" title="type parameter in CacheLoader">V</a>> loadAll(<a href="http://download.oracle.com/javase/6/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a><? extends <a href="../../../javax/cache/integration/CacheLoader.html" title="type parameter in CacheLoader">K</a>> keys) |
| throws <a href="../../../javax/cache/integration/CacheLoaderException.html" title="class in javax.cache.integration">CacheLoaderException</a></pre> |
| <div class="block">Loads multiple objects. Application developers should implement this |
| method to customize the loading of cache entries. This method is called |
| when the requested object is not in the cache. If an object can't be loaded, |
| it is not returned in the resulting map.</div> |
| <dl><dt><span class="strong">Parameters:</span></dt><dd><code>keys</code> - keys identifying the values to be loaded</dd> |
| <dt><span class="strong">Returns:</span></dt><dd>A map of key, values to be stored in the cache.</dd> |
| <dt><span class="strong">Throws:</span></dt> |
| <dd><code><a href="../../../javax/cache/integration/CacheLoaderException.html" title="class in javax.cache.integration">CacheLoaderException</a></code> - if there is problem executing the loader.</dd></dl> |
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