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<title>HttpCacheStorage (Apache HttpComponents Client 4.5.14 API)</title>
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<div class="subTitle">org.apache.http.client.cache</div>
<h2 title="Interface HttpCacheStorage" class="title">Interface HttpCacheStorage</h2>
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<dt>All Known Implementing Classes:</dt>
<dd><a href="../../../../../org/apache/http/impl/client/cache/BasicHttpCacheStorage.html" title="class in org.apache.http.impl.client.cache">BasicHttpCacheStorage</a>, <a href="../../../../../org/apache/http/impl/client/cache/ehcache/EhcacheHttpCacheStorage.html" title="class in org.apache.http.impl.client.cache.ehcache">EhcacheHttpCacheStorage</a>, <a href="../../../../../org/apache/http/impl/client/cache/ManagedHttpCacheStorage.html" title="class in org.apache.http.impl.client.cache">ManagedHttpCacheStorage</a>, <a href="../../../../../org/apache/http/impl/client/cache/memcached/MemcachedHttpCacheStorage.html" title="class in org.apache.http.impl.client.cache.memcached">MemcachedHttpCacheStorage</a></dd>
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<pre>public interface <span class="strong">HttpCacheStorage</span></pre>
<div class="block">New storage backends should implement this <a href="../../../../../org/apache/http/client/cache/HttpCacheStorage.html" title="interface in org.apache.http.client.cache"><code>HttpCacheStorage</code></a>
interface. They can then be plugged into the existing
<a href="../../../../../org/apache/http/impl/client/cache/CachingHttpClient.html" title="class in org.apache.http.impl.client.cache"><code>CachingHttpClient</code></a>
implementation.</div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>4.1</dd></dl>
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<caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/apache/http/client/cache/HttpCacheEntry.html" title="class in org.apache.http.client.cache">HttpCacheEntry</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/http/client/cache/HttpCacheStorage.html#getEntry(java.lang.String)">getEntry</a></strong>(<a href="https://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key)</code>
<div class="block">Retrieves the cache entry stored under the given key
or null if no entry exists under that key.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/http/client/cache/HttpCacheStorage.html#putEntry(java.lang.String,%20org.apache.http.client.cache.HttpCacheEntry)">putEntry</a></strong>(<a href="https://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key,
<a href="../../../../../org/apache/http/client/cache/HttpCacheEntry.html" title="class in org.apache.http.client.cache">HttpCacheEntry</a>&nbsp;entry)</code>
<div class="block">Store a given cache entry under the given key.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/http/client/cache/HttpCacheStorage.html#removeEntry(java.lang.String)">removeEntry</a></strong>(<a href="https://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key)</code>
<div class="block">Deletes/invalidates/removes any cache entries currently
stored under the given key.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../../../../org/apache/http/client/cache/HttpCacheStorage.html#updateEntry(java.lang.String,%20org.apache.http.client.cache.HttpCacheUpdateCallback)">updateEntry</a></strong>(<a href="https://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key,
<a href="../../../../../org/apache/http/client/cache/HttpCacheUpdateCallback.html" title="interface in org.apache.http.client.cache">HttpCacheUpdateCallback</a>&nbsp;callback)</code>
<div class="block">Atomically applies the given callback to update an existing cache
entry under a given key.</div>
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<h4>putEntry</h4>
<pre>void&nbsp;putEntry(<a href="https://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key,
<a href="../../../../../org/apache/http/client/cache/HttpCacheEntry.html" title="class in org.apache.http.client.cache">HttpCacheEntry</a>&nbsp;entry)
throws <a href="https://docs.oracle.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Store a given cache entry under the given key.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - where in the cache to store the entry</dd><dd><code>entry</code> - cached response to store</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd></dl>
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<h4>getEntry</h4>
<pre><a href="../../../../../org/apache/http/client/cache/HttpCacheEntry.html" title="class in org.apache.http.client.cache">HttpCacheEntry</a>&nbsp;getEntry(<a href="https://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key)
throws <a href="https://docs.oracle.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Retrieves the cache entry stored under the given key
or null if no entry exists under that key.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - cache key</dd>
<dt><span class="strong">Returns:</span></dt><dd>an <a href="../../../../../org/apache/http/client/cache/HttpCacheEntry.html" title="class in org.apache.http.client.cache"><code>HttpCacheEntry</code></a> or <code>null</code> if no
entry exists</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd></dl>
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<h4>removeEntry</h4>
<pre>void&nbsp;removeEntry(<a href="https://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key)
throws <a href="https://docs.oracle.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></pre>
<div class="block">Deletes/invalidates/removes any cache entries currently
stored under the given key.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - </dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd></dl>
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<h4>updateEntry</h4>
<pre>void&nbsp;updateEntry(<a href="https://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>&nbsp;key,
<a href="../../../../../org/apache/http/client/cache/HttpCacheUpdateCallback.html" title="interface in org.apache.http.client.cache">HttpCacheUpdateCallback</a>&nbsp;callback)
throws <a href="https://docs.oracle.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a>,
<a href="../../../../../org/apache/http/client/cache/HttpCacheUpdateException.html" title="class in org.apache.http.client.cache">HttpCacheUpdateException</a></pre>
<div class="block">Atomically applies the given callback to update an existing cache
entry under a given key.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>key</code> - indicates which entry to modify</dd><dd><code>callback</code> - performs the update; see
<a href="../../../../../org/apache/http/client/cache/HttpCacheUpdateCallback.html" title="interface in org.apache.http.client.cache"><code>HttpCacheUpdateCallback</code></a> for details, but roughly the
callback expects to be handed the current entry and will return
the new value for the entry.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/6/docs/api/java/io/IOException.html?is-external=true" title="class or interface in java.io">IOException</a></code></dd>
<dd><code><a href="../../../../../org/apache/http/client/cache/HttpCacheUpdateException.html" title="class in org.apache.http.client.cache">HttpCacheUpdateException</a></code></dd></dl>
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