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| |
| |
| <h1 id="Apache_Ignite_Core_Cache_Store_ICacheStore_2" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2" class="text-break">Interface ICacheStore<TK, TV> |
| </h1> |
| <div class="markdown level0 summary"><p>API for cache persistent storage for read-through and write-through behavior. |
| <p> |
| Generic argument types depend on <a class="xref" href="Apache.Ignite.Core.Cache.Configuration.CacheConfiguration.html#Apache_Ignite_Core_Cache_Configuration_CacheConfiguration_KeepBinaryInStore">KeepBinaryInStore</a> property. |
| When <code>true</code> (default), cache store operates on <a class="xref" href="Apache.Ignite.Core.Binary.IBinaryObject.html">IBinaryObject</a> instances. |
| Otherwise, generic arguments should be the same as in corresponding <a class="xref" href="Apache.Ignite.Core.Cache.ICache-2.html">ICache<TK, TV></a>. |
| <p> |
| Persistent store is configured in Ignite's Spring XML configuration file via |
| <code>CacheConfiguration.setStore()</code> property. If you have an implementation |
| of cache store in .NET, you should use special Java wrapper which accepts assembly name and |
| class name of .NET store implementation (both properties are mandatory).</p> |
| <p>Optionally, you may specify "properies" property to set any property values on an instance of your store. |
| <example> |
| Here is an example:<p> |
| <pre><code><bean class="org.apache.ignite.configuration.CacheConfiguration"> |
| ... |
| <property name="cacheStoreFactory"> |
| <bean class="org.apache.ignite.platform.dotnet.PlatformDotNetCacheStoreFactory"> |
| <property name="assemblyName" value="MyAssembly"/> |
| <property name="className" value="MyApp.MyCacheStore"/> |
| <property name="properties"> |
| <map> |
| <entry key="IntProperty"> |
| <value type="java.lang.Integer">42</value> |
| </entry> |
| <entry key="StringProperty" value="String value"/> |
| </map> |
| </property> |
| </bean> |
| </property> |
| ... |
| </bean></code></pre> |
| <p></example> |
| Assemply name and class name are passed to <a target="_blank" href="http://msdn.microsoft.com/en-us/library/d133hta4.aspx"><strong>System.Activator.CreateInstance(String, String)</strong></a> |
| method during node startup to create an instance of cache store. Refer to its documentation for details. |
| <p> |
| All transactional operations of this API are provided with ongoing <a class="xref" href="Apache.Ignite.Core.Transactions.ITransaction.html">ITransaction</a>, |
| if any. You can attach any metadata to transaction, e.g. to recognize if several operations |
| belong to the same transaction or not. |
| <example> |
| Here is an example of how attach a ODBC connection as transaction metadata:<p> |
| <pre><code>OdbcConnection conn = tx.Meta("some.name"); |
| |
| if (conn == null) |
| { |
| conn = ...; // Create or get connection. |
| |
| // Store connection in transaction metadata, so it can be accessed |
| // for other operations on the same transaction. |
| tx.AddMeta("some.name", conn); |
| }</code></pre> |
| <p></example></p> |
| </div> |
| <div class="markdown level0 conceptual"></div> |
| <h6><strong>Namespace</strong>: <a class="xref" href="Apache.Ignite.Core.Cache.Store.html">Apache.Ignite.Core.Cache.Store</a></h6> |
| <h6><strong>Assembly</strong>: Apache.Ignite.Core.dll</h6> |
| <h5 id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_syntax">Syntax</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">public interface ICacheStore<TK, TV> : ICacheStore</code></pre> |
| </div> |
| <h5 class="typeParameters">Type Parameters</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Name</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="parametername">TK</span></td> |
| <td><p>Key type.</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="parametername">TV</span></td> |
| <td><p>Value type.</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h3 id="methods">Methods |
| </h3> |
| <a id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_Delete_" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.Delete*"></a> |
| <h4 id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_Delete__0_" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.Delete(`0)">Delete(TK)</h4> |
| <div class="markdown level1 summary"><p>Delete the cache entry from the external resource. |
| <p> |
| Expiry of a cache entry is not a delete hence will not cause this method to be invoked. |
| <p> |
| This method is invoked even if no mapping for the key exists.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">void Delete(TK key)</code></pre> |
| </div> |
| <h5 class="parameters">Parameters</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Name</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">TK</span></td> |
| <td><span class="parametername">key</span></td> |
| <td><p>The key that is used for the delete operation.</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="exceptions">Exceptions</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Condition</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><a class="xref" href="Apache.Ignite.Core.Cache.Store.CacheStoreException.html">CacheStoreException</a></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <a id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_DeleteAll_" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.DeleteAll*"></a> |
| <h4 id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_DeleteAll_System_Collections_Generic_IEnumerable__0__" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.DeleteAll(System.Collections.Generic.IEnumerable{`0})">DeleteAll(IEnumerable<TK>)</h4> |
| <div class="markdown level1 summary"><p>Remove data and keys from the external resource for the given collection of keys, if present. |
| <p> |
| The order that individual deletes occur is undefined. |
| <p> |
| If this operation fails (by throwing an exception) after a partial success, |
| the writer must remove any successfully written entries from the entries collection |
| so that the caching implementation knows what succeeded and can mutate the cache. |
| <p> |
| Expiry of a cache entry is not a delete hence will not cause this method to be invoked. |
| <p> |
| This method may include keys even if there is no mapping for that key, |
| in which case the data represented by that key should be removed from the underlying resource.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">void DeleteAll(IEnumerable<TK> keys)</code></pre> |
| </div> |
| <h5 class="parameters">Parameters</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Name</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">System.Collections.Generic.IEnumerable</span><TK></td> |
| <td><span class="parametername">keys</span></td> |
| <td><p>a mutable collection of keys for entries to delete. Upon invocation, |
| it contains the keys to delete for write-through. Upon return the collection must only contain |
| the keys that were not successfully deleted.</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="exceptions">Exceptions</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Condition</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><a class="xref" href="Apache.Ignite.Core.Cache.Store.CacheStoreException.html">CacheStoreException</a></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <a id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_Load_" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.Load*"></a> |
| <h4 id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_Load__0_" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.Load(`0)">Load(TK)</h4> |
| <div class="markdown level1 summary"><p>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.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">TV Load(TK key)</code></pre> |
| </div> |
| <h5 class="parameters">Parameters</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Name</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">TK</span></td> |
| <td><span class="parametername">key</span></td> |
| <td><p>The key identifying the object being loaded.</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="returns">Returns</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">TV</span></td> |
| <td><p>The value for the entry that is to be stored in the cache |
| or <code>null</code> if the object can't be loaded</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="exceptions">Exceptions</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Condition</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><a class="xref" href="Apache.Ignite.Core.Cache.Store.CacheStoreException.html">CacheStoreException</a></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <a id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_LoadAll_" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.LoadAll*"></a> |
| <h4 id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_LoadAll_System_Collections_Generic_IEnumerable__0__" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.LoadAll(System.Collections.Generic.IEnumerable{`0})">LoadAll(IEnumerable<TK>)</h4> |
| <div class="markdown level1 summary"><p>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.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">IEnumerable<KeyValuePair<TK, TV>> LoadAll(IEnumerable<TK> keys)</code></pre> |
| </div> |
| <h5 class="parameters">Parameters</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Name</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">System.Collections.Generic.IEnumerable</span><TK></td> |
| <td><span class="parametername">keys</span></td> |
| <td><p>Keys identifying the values to be loaded.</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="returns">Returns</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">System.Collections.Generic.IEnumerable</span><<span class="xref">System.Collections.Generic.KeyValuePair</span><TK, TV>></td> |
| <td><p>A map of key, values to be stored in the cache.</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="exceptions">Exceptions</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Condition</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><a class="xref" href="Apache.Ignite.Core.Cache.Store.CacheStoreException.html">CacheStoreException</a></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <a id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_LoadCache_" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.LoadCache*"></a> |
| <h4 id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_LoadCache_System_Action__0__1__System_Object___" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.LoadCache(System.Action{`0,`1},System.Object[])">LoadCache(Action<TK, TV>, Object[])</h4> |
| <div class="markdown level1 summary"><p>Loads all values from underlying persistent storage. Note that keys are |
| not passed, so it is up to implementation to figure out what to load. |
| This method is called whenever <a class="xref" href="Apache.Ignite.Core.Cache.ICache-2.html#Apache_Ignite_Core_Cache_ICache_2_LocalLoadCache_Apache_Ignite_Core_Cache_ICacheEntryFilter__0__1__System_Object___">LocalLoadCache(ICacheEntryFilter<TK, TV>, Object[])</a> |
| method is invoked which is usually to preload the cache from persistent storage. |
| <p> |
| This method is optional, and cache implementation |
| does not depend on this method to do anything. |
| <p> |
| For every loaded value method provided action should be called. |
| The action will then make sure that the loaded value is stored in cache.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">void LoadCache(Action<TK, TV> act, params object[] args)</code></pre> |
| </div> |
| <h5 class="parameters">Parameters</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Name</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">System.Action</span><TK, TV></td> |
| <td><span class="parametername">act</span></td> |
| <td><p>Action for loaded values.</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">System.Object</span>[]</td> |
| <td><span class="parametername">args</span></td> |
| <td><p>Optional arguemnts passed to <a class="xref" href="Apache.Ignite.Core.Cache.ICache-2.html#Apache_Ignite_Core_Cache_ICache_2_LocalLoadCache_Apache_Ignite_Core_Cache_ICacheEntryFilter__0__1__System_Object___">LocalLoadCache(ICacheEntryFilter<TK, TV>, Object[])</a> method.</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="exceptions">Exceptions</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Condition</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><a class="xref" href="Apache.Ignite.Core.Cache.Store.CacheStoreException.html">CacheStoreException</a></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <a id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_SessionEnd_" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.SessionEnd*"></a> |
| <h4 id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_SessionEnd_System_Boolean_" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.SessionEnd(System.Boolean)">SessionEnd(Boolean)</h4> |
| <div class="markdown level1 summary"><p>Tells store to commit or rollback a transaction depending on the value of the |
| <code>commit</code> parameter.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">void SessionEnd(bool commit)</code></pre> |
| </div> |
| <h5 class="parameters">Parameters</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Name</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">System.Boolean</span></td> |
| <td><span class="parametername">commit</span></td> |
| <td><p><code>True</code> if transaction should commit, <code>false</code> for rollback.</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="exceptions">Exceptions</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Condition</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><a class="xref" href="Apache.Ignite.Core.Cache.Store.CacheStoreException.html">CacheStoreException</a></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <a id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_Write_" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.Write*"></a> |
| <h4 id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_Write__0__1_" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.Write(`0,`1)">Write(TK, TV)</h4> |
| <div class="markdown level1 summary"><p>Write the specified value under the specified key to the external resource. |
| <p> |
| This method is intended to support both key/value creation and value update.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">void Write(TK key, TV val)</code></pre> |
| </div> |
| <h5 class="parameters">Parameters</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Name</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">TK</span></td> |
| <td><span class="parametername">key</span></td> |
| <td><p>Key to write.</p> |
| </td> |
| </tr> |
| <tr> |
| <td><span class="xref">TV</span></td> |
| <td><span class="parametername">val</span></td> |
| <td><p>Value to write.</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="exceptions">Exceptions</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Condition</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><a class="xref" href="Apache.Ignite.Core.Cache.Store.CacheStoreException.html">CacheStoreException</a></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| <a id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_WriteAll_" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.WriteAll*"></a> |
| <h4 id="Apache_Ignite_Core_Cache_Store_ICacheStore_2_WriteAll_System_Collections_Generic_IEnumerable_System_Collections_Generic_KeyValuePair__0__1___" data-uid="Apache.Ignite.Core.Cache.Store.ICacheStore`2.WriteAll(System.Collections.Generic.IEnumerable{System.Collections.Generic.KeyValuePair{`0,`1}})">WriteAll(IEnumerable<KeyValuePair<TK, TV>>)</h4> |
| <div class="markdown level1 summary"><p>Write the specified entries to the external resource. |
| This method is intended to support both insert and update. |
| <p> |
| The order that individual writes occur is undefined. |
| <p> |
| If this operation fails (by throwing an exception) after a partial success, |
| the writer must remove any successfully written entries from the entries collection |
| so that the caching implementation knows what succeeded and can mutate the cache.</p> |
| </div> |
| <div class="markdown level1 conceptual"></div> |
| <h5 class="decalaration">Declaration</h5> |
| <div class="codewrapper"> |
| <pre><code class="lang-csharp hljs">void WriteAll(IEnumerable<KeyValuePair<TK, TV>> entries)</code></pre> |
| </div> |
| <h5 class="parameters">Parameters</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Name</th> |
| <th>Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><span class="xref">System.Collections.Generic.IEnumerable</span><<span class="xref">System.Collections.Generic.KeyValuePair</span><TK, TV>></td> |
| <td><span class="parametername">entries</span></td> |
| <td><p>a mutable collection to write. Upon invocation, it contains the entries |
| to write for write-through. Upon return the collection must only contain entries |
| that were not successfully written. (see partial success above).</p> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| <h5 class="exceptions">Exceptions</h5> |
| <table class="table table-bordered table-striped table-condensed"> |
| <thead> |
| <tr> |
| <th>Type</th> |
| <th>Condition</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr> |
| <td><a class="xref" href="Apache.Ignite.Core.Cache.Store.CacheStoreException.html">CacheStoreException</a></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| </article> |
| </div> |
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