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<!DOCTYPE html>
<!--[if IE 8]><html class="no-js lt-ie9" lang="en" > <![endif]-->
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<title>Caching — Stormpath Java Servlet Plugin 1.5.4 documentation</title>
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<li class="toctree-l2"><a class="reference internal" href="about.html#what-is-stormpath">What is Stormpath?</a></li>
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<li class="toctree-l2"><a class="reference internal" href="about.html#who-should-use-stormpath">Who should use Stormpath?</a></li>
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<li class="toctree-l2"><a class="reference internal" href="quickstart.html#get-an-api-key">Get an API Key</a></li>
<li class="toctree-l2"><a class="reference internal" href="quickstart.html#add-the-project">Add the Stormpath Java Servlet Plugin</a></li>
<li class="toctree-l2"><a class="reference internal" href="quickstart.html#try-it">Try it!</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="config.html#property-locations">Property Locations</a><ul>
<li class="toctree-l4"><a class="reference internal" href="config.html#plugin-web-stormpath-properties">1. Plugin web.stormpath.properties</a></li>
<li class="toctree-l4"><a class="reference internal" href="config.html#classpath-stormpath-properties">2. classpath:stormpath.properties</a></li>
<li class="toctree-l4"><a class="reference internal" href="config.html#web-inf-stormpath-properties">3. /WEB-INF/stormpath.properties</a></li>
<li class="toctree-l4"><a class="reference internal" href="config.html#servlet-context-parameters">4. Servlet Context Parameters</a></li>
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<li class="toctree-l3"><a class="reference internal" href="config.html#api-key">API Key</a></li>
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<li class="toctree-l3"><a class="reference internal" href="config.html#id2">Usage</a></li>
</ul>
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<li class="toctree-l2"><a class="reference internal" href="config.html#filters">Filters</a><ul>
<li class="toctree-l3"><a class="reference internal" href="config.html#default-filters">Default Filters</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="config.html#uris">URIs</a><ul>
<li class="toctree-l3"><a class="reference internal" href="config.html#uri-evaluation-priority">URI Evaluation Priority</a></li>
</ul>
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</ul>
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<li class="toctree-l3"><a class="reference internal" href="registration.html#enabled">Enabled</a></li>
<li class="toctree-l3"><a class="reference internal" href="registration.html#uri">URI</a></li>
<li class="toctree-l3"><a class="reference internal" href="registration.html#next-uri">Next URI</a><ul>
<li class="toctree-l4"><a class="reference internal" href="registration.html#next-query-parameter">Next Query Parameter</a></li>
</ul>
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<li class="toctree-l3"><a class="reference internal" href="registration.html#autologin">AutoLogin</a></li>
<li class="toctree-l3"><a class="reference internal" href="registration.html#form-fields">Form Fields</a><ul>
<li class="toctree-l4"><a class="reference internal" href="registration.html#form-field-definitions">Form Field Definitions</a></li>
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<li class="toctree-l4"><a class="reference internal" href="registration.html#disabling-form-fields">Disabling Form Fields</a></li>
<li class="toctree-l4"><a class="reference internal" href="registration.html#form-field-order">Form Field Order</a></li>
</ul>
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<li class="toctree-l3"><a class="reference internal" href="registration.html#password-strength">Password Strength</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="registration.html#email-verification">Email Verification</a><ul>
<li class="toctree-l3"><a class="reference internal" href="registration.html#try-it">Try it!</a></li>
<li class="toctree-l3"><a class="reference internal" href="registration.html#verify-link-base-url">Verify Link Base URL</a></li>
<li class="toctree-l3"><a class="reference internal" href="registration.html#verify-next-uri">Verify Next URI</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="registration.html#internationalization-i18n">Internationalization (i18n)</a></li>
<li class="toctree-l2"><a class="reference internal" href="registration.html#pre-register-handler">Pre Register Handler</a></li>
<li class="toctree-l2"><a class="reference internal" href="registration.html#post-register-handler">Post Register Handler</a></li>
<li class="toctree-l2"><a class="reference internal" href="registration.html#events">Events</a><ul>
<li class="toctree-l3"><a class="reference internal" href="registration.html#registered-account">Registered Account</a></li>
<li class="toctree-l3"><a class="reference internal" href="registration.html#verified-account">Verified Account</a></li>
</ul>
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</ul>
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<li class="toctree-l1"><a class="reference internal" href="login.html">Login</a><ul>
<li class="toctree-l2"><a class="reference internal" href="login.html#overview">Overview</a></li>
<li class="toctree-l2"><a class="reference internal" href="login.html#security-notice">Security Notice</a></li>
<li class="toctree-l2"><a class="reference internal" href="login.html#uri">URI</a><ul>
<li class="toctree-l3"><a class="reference internal" href="login.html#next-query-parameter">Next Query Parameter</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="login.html#next-uri">Next URI</a></li>
<li class="toctree-l2"><a class="reference internal" href="login.html#internationalization-i18n">Internationalization (i18n)</a></li>
<li class="toctree-l2"><a class="reference internal" href="login.html#pre-login-handler">Pre Login Handler</a></li>
<li class="toctree-l2"><a class="reference internal" href="login.html#post-login-handler">Post Login Handler</a></li>
<li class="toctree-l2"><a class="reference internal" href="login.html#events">Events</a></li>
<li class="toctree-l2"><a class="reference internal" href="login.html#authentication-state">Authentication State</a><ul>
<li class="toctree-l3"><a class="reference internal" href="login.html#saving-authentication-state">Saving Authentication State</a></li>
<li class="toctree-l3"><a class="reference internal" href="login.html#cookie-storage">Cookie Storage</a><ul>
<li class="toctree-l4"><a class="reference internal" href="login.html#cookie-config">Cookie Config</a></li>
<li class="toctree-l4"><a class="reference internal" href="login.html#jwt-creation">JWT Creation</a></li>
<li class="toctree-l4"><a class="reference internal" href="login.html#disabling-cookie-storage">Disabling Cookie Storage</a></li>
</ul>
</li>
<li class="toctree-l3"><a class="reference internal" href="login.html#custom-savers">Custom Savers</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="social.html">Social Login</a><ul>
<li class="toctree-l2"><a class="reference internal" href="social.html#facebook-login">Facebook Login</a><ul>
<li class="toctree-l3"><a class="reference internal" href="social.html#create-a-facebook-app">Create a Facebook App</a></li>
<li class="toctree-l3"><a class="reference internal" href="social.html#specify-allowed-urls">Specify Allowed URLs</a></li>
<li class="toctree-l3"><a class="reference internal" href="social.html#create-a-facebook-directory">Create a Facebook Directory</a></li>
<li class="toctree-l3"><a class="reference internal" href="social.html#test-it-out">Test it Out</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="social.html#google-login">Google Login</a><ul>
<li class="toctree-l3"><a class="reference internal" href="social.html#create-a-google-project">Create a Google Project</a></li>
<li class="toctree-l3"><a class="reference internal" href="social.html#enable-google-login">Enable Google Login</a></li>
<li class="toctree-l3"><a class="reference internal" href="social.html#create-oauth-credentials">Create OAuth Credentials</a></li>
<li class="toctree-l3"><a class="reference internal" href="social.html#create-a-google-directory">Create a Google Directory</a></li>
<li class="toctree-l3"><a class="reference internal" href="social.html#id1">Test it Out</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="social.html#linkedin-login">LinkedIn Login</a><ul>
<li class="toctree-l3"><a class="reference internal" href="social.html#create-a-linkedin-application">Create a LinkedIn Application</a></li>
<li class="toctree-l3"><a class="reference internal" href="social.html#enable-linkedin-permissions">Enable LinkedIn Permissions</a></li>
<li class="toctree-l3"><a class="reference internal" href="social.html#create-a-linkedin-directory">Create a LinkedIn Directory</a></li>
<li class="toctree-l3"><a class="reference internal" href="social.html#id2">Test it Out</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="social.html#json-api">JSON API</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="forgot-password.html">Forgot Password</a><ul>
<li class="toctree-l2"><a class="reference internal" href="forgot-password.html#overview">Overview</a></li>
<li class="toctree-l2"><a class="reference internal" href="forgot-password.html#configure-the-workflow">Configure the Workflow</a></li>
<li class="toctree-l2"><a class="reference internal" href="forgot-password.html#try-it">Try it!</a></li>
<li class="toctree-l2"><a class="reference internal" href="forgot-password.html#forgot-uri">Forgot URI</a></li>
<li class="toctree-l2"><a class="reference internal" href="forgot-password.html#forgot-next-uri">Forgot Next URI</a></li>
<li class="toctree-l2"><a class="reference internal" href="forgot-password.html#change-password-uri">Change Password URI</a></li>
<li class="toctree-l2"><a class="reference internal" href="forgot-password.html#change-password-next-uri">Change Password Next URI</a></li>
<li class="toctree-l2"><a class="reference internal" href="forgot-password.html#i18n">i18n</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="logout.html">Logout</a><ul>
<li class="toctree-l2"><a class="reference internal" href="logout.html#uri">URI</a><ul>
<li class="toctree-l3"><a class="reference internal" href="logout.html#next-query-parameter">Next Query Parameter</a></li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="logout.html#next-uri">Next URI</a></li>
<li class="toctree-l2"><a class="reference internal" href="logout.html#events">Events</a></li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="request-authentication.html">HTTP Request Authentication</a><ul>
<li class="toctree-l2"><a class="reference internal" href="request-authentication.html#http-basic-authentication">HTTP Basic Authentication</a></li>
<li class="toctree-l2"><a class="reference internal" href="request-authentication.html#token-authentication">Token Authentication</a><ul>
<li class="toctree-l3"><a class="reference internal" href="request-authentication.html#get-a-token">Get a Token</a><ul>
<li class="toctree-l4"><a class="reference internal" href="request-authentication.html#curl">cURL</a></li>
<li class="toctree-l4"><a class="reference internal" href="request-authentication.html#html-form-and-ajax">HTML Form and AJAX</a></li>
<li class="toctree-l4"><a class="reference internal" href="request-authentication.html#origin-or-referer-required">Origin or Referer Required</a></li>
<li class="toctree-l4"><a class="reference internal" href="request-authentication.html#https-required">HTTPS Required</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l2"><a class="reference internal" href="request-authentication.html#api-key-authentication">API Key Authentication</a><ul>
<li class="toctree-l3"><a class="reference internal" href="request-authentication.html#determining-api-key-authentication">Determining API Key Authentication</a></li>
</ul>
</li>
</ul>
</li>
<li class="toctree-l1"><a class="reference internal" href="request.html">Request Context</a><ul>
<li class="toctree-l2"><a class="reference internal" href="request.html#current-user-account">Current User Account</a><ul>
<li class="toctree-l3"><a class="reference internal" href="request.html#account-resolver">Account Resolver</a></li>
<li class="toctree-l3"><a class="reference internal" href="request.html#request-attributes">Request Attributes</a><ul>
<li class="toctree-l4"><a class="reference internal" href="request.html#request-attribute-names">Request Attribute Names</a></li>
</ul>
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<li class="toctree-l3"><a class="reference internal" href="request.html#http-servlet-request-api">HTTP Servlet Request API</a><ul>
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<li class="toctree-l2"><a class="reference internal" href="#disable-caching">Disable Caching</a><ul>
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<li class="toctree-l3"><a class="reference internal" href="#default-tti">Default TTI</a></li>
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<div class="section" id="caching">
<span id="id1"></span><h1>Caching<a class="headerlink" href="#caching" title="Permalink to this headline">¶</a></h1>
<p>The Stormpath Java Servlet Plugin delegates to an SDK Client, which supports caching to reduce round-trips to the Stormpath API servers and to improve performance. By default, a single (non-clustered) in-process memory cache is enabled.</p>
<p>This behavior is relevant for applications that are deployed to a single JVM only. If your application is deployed on multiple web hosts/nodes simultaneously (i.e. striped or clustered applications), then you should <a class="reference internal" href="#shared-cache"><span class="std std-ref">configure a shared cache</span></a> instead to ensure that cached data remains coherent across all application instances.</p>
<div class="section" id="in-process-cache">
<h2>In-Process Cache<a class="headerlink" href="#in-process-cache" title="Permalink to this headline">¶</a></h2>
<p>You can configure the out-of-the-box in-memory cache for the single-JVM application use case using <a class="reference internal" href="config.html#config"><span class="std std-ref">configuration properties</span></a>.</p>
<p>The cache memory space is segmented into regions or ‘sections’, allowing you to specify different caching behavior for each region.</p>
</div>
<div class="section" id="disable-caching">
<h2>Disable Caching<a class="headerlink" href="#disable-caching" title="Permalink to this headline">¶</a></h2>
<p>If you want to disable caching for the Stormpath SDK <code class="docutils literal"><span class="pre">Client</span></code> entirely, you can set the <code class="docutils literal"><span class="pre">stormpath.client.cacheManager.enabled</span></code> property to <code class="docutils literal"><span class="pre">false</span></code>:</p>
<div class="highlight-properties"><div class="highlight"><pre><span></span><span class="na">stormpath.client.cacheManager.enabled</span> <span class="o">=</span> <span class="s">false</span>
</pre></div>
</div>
<p>It is generally not recommended to disable caching, but it might be useful in certain testing scenarios or when multiple applications can frequently modify the same Stormpath data.</p>
<div class="section" id="default-ttl">
<span id="id2"></span><h3>Default TTL<a class="headerlink" href="#default-ttl" title="Permalink to this headline">¶</a></h3>
<p>TTL, or ‘Time to Live’ is how long a cache entry is allowed to remain in the cache, regardless of how often it is accessed. After this amount of time, the cache entry will considered invalid and will removed (‘evicted’) from the cache.</p>
<p>You can specify the default TTL value for all cache regions by setting the <code class="docutils literal"><span class="pre">stormpath.client.cacheManager.defaultTtl</span></code> value in milliseconds:</p>
<div class="highlight-properties"><div class="highlight"><pre><span></span><span class="c"># 3,600,000 milliseconds = 1 hour</span>
<span class="na">stormpath.client.cacheManager.defaultTtl</span> <span class="o">=</span> <span class="s">3600000</span>
</pre></div>
</div>
</div>
<div class="section" id="default-tti">
<h3>Default TTI<a class="headerlink" href="#default-tti" title="Permalink to this headline">¶</a></h3>
<p>TTI, or ‘Time to Idle’ is how long a cache entry is allowed to remain idle (unreferenced, not used) in the cache before it can be removed (‘evicted’) from the cache.</p>
<p>You can specify the default TTI value for all cache regions by setting the <code class="docutils literal"><span class="pre">stormpath.client.cacheManager.defaultTti</span></code> value in milliseconds:</p>
<div class="highlight-properties"><div class="highlight"><pre><span></span><span class="c"># 3,600,000 milliseconds = 1 hour</span>
<span class="na">stormpath.client.cacheManager.defaultTti</span> <span class="o">=</span> <span class="s">3600000</span>
</pre></div>
</div>
</div>
<div class="section" id="cache-regions">
<h3>Cache Regions<a class="headerlink" href="#cache-regions" title="Permalink to this headline">¶</a></h3>
<p>Cache Regions are automatically created as they are requested and use the default ttl and tti - you do not need to configure them explicitly.</p>
<p>However, if you want to specify a cache region’s TTL or TTI, you can do so using a configuration property convention; prefix the region name <code class="docutils literal"><span class="pre">stormpath.client.cacheManager.caches</span></code> and suffix the name with <code class="docutils literal"><span class="pre">.ttl</span></code> or <code class="docutils literal"><span class="pre">tti</span></code> for TTL or TTI respectively.</p>
<p>For example, let’s assume we have a cache region named <code class="docutils literal"><span class="pre">My</span> <span class="pre">Test</span> <span class="pre">Cache</span> <span class="pre">Region</span></code> and wanted a 5 minute time-to-idle and a 30 minute time-to-live. We’d define two configuration properties as follows:</p>
<div class="highlight-properties"><div class="highlight"><pre><span></span><span class="c"># 300,000 millis = 5 minutes:</span>
<span class="na">stormpath.client.cacheManager.caches.My Test Cache Region.tti</span> <span class="o">=</span> <span class="s">300000</span>
<span class="c"># 1,800,000 millis = 30 minutes:</span>
<span class="na">stormpath.client.cacheManager.caches.My Test Cache Region.ttl</span> <span class="o">=</span> <span class="s">1800000</span>
</pre></div>
</div>
<p>If a cache region does not have configured <code class="docutils literal"><span class="pre">.tti</span></code> or <code class="docutils literal"><span class="pre">.ttl</span></code> values, the <a class="reference internal" href="#default-ttl"><span class="std std-ref">default ttl and tti values</span></a> are assumed.</p>
</div>
<div class="section" id="client-cache-regions">
<h3>Client Cache Regions<a class="headerlink" href="#client-cache-regions" title="Permalink to this headline">¶</a></h3>
<p>The Stormpath Client creates a cache region <em>per</em> resource data type. That is, all cached Accounts are in one region, all cached Groups are in another, etc. The region names are equal to the fully qualified <em>interface</em> name of each resource type. For example:</p>
<ul class="simple">
<li><code class="docutils literal"><span class="pre">com.stormpath.sdk.account.Account</span></code></li>
<li><code class="docutils literal"><span class="pre">com.stormpath.sdk.group.Group</span></code></li>
<li>etc...</li>
</ul>
<p>If you want to configure caching rules for a particular client resource type, when adding the necessary property prefix and suffix, you might have the following config lines (for example):</p>
<div class="highlight-properties"><div class="highlight"><pre><span></span><span class="na">stormpath.client.cacheManager.caches.com.stormpath.sdk.account.Account.tti</span> <span class="o">=</span> <span class="s">3600000</span>
<span class="na">stormpath.client.cacheManager.caches.com.stormpath.sdk.group.Group.ttl</span> <span class="o">=</span> <span class="s">4800000</span>
</pre></div>
</div>
</div>
</div>
<div class="section" id="shared-cache">
<span id="id3"></span><h2>Shared Cache<a class="headerlink" href="#shared-cache" title="Permalink to this headline">¶</a></h2>
<p>Each web application instance will, by default, have its <em>own</em> private in-process cache as described above.</p>
<p>However, if your web application .war is deployed on multiple JVMs - for example, you load balance requests across multiple identical web application nodes - you may experience data cache inconsistency problems if the default cache remains enabled: separate private cache instances are often not desirable because each web app instance could see its own ‘version’ of the cached data.</p>
<p>For example, if a user sends a request that is directed to web app instance A and then a subsequent request is directed to web app instance B, and the two instances do not agree on the same cached data, this could cause data integrity problems in many applications. This can be solved by using a shared or distributed cache to ensure cache consistency, also known as <a class="reference external" href="http://en.wikipedia.org/wiki/Cache_coherence">cache coherence</a>.</p>
<p>If you need cache coherency, you will want to specify a <code class="docutils literal"><span class="pre">com.stormpath.sdk.cache.CacheManager</span></code> implementation that can communicate with a shared or distributed cache system, like Hazelcast, Redis, etc.</p>
<p>You can do this by specifying the <code class="docutils literal"><span class="pre">stormpath.client.cacheManager</span></code> configuration property, for example:</p>
<div class="highlight-properties"><div class="highlight"><pre><span></span><span class="na">stormpath.client.cacheManager</span> <span class="o">=</span> <span class="s">your.fully.qualified.implementation.of.CacheManager</span>
</pre></div>
</div>
<div class="section" id="nonce-cache-region">
<h3>Nonce Cache Region<a class="headerlink" href="#nonce-cache-region" title="Permalink to this headline">¶</a></h3>
<p>In addition to the type-specific regions mentioned above, another region exists to cache nonce values (nonce = ‘number used once’) for certain cryptographic values that should not be repeated at runtime. By default, the cache region is named <code class="docutils literal"><span class="pre">com.stormpath.sdk.servlet.nonces</span></code> and each nonce value will be cached in that region.</p>
<p>If you want to change the name of the region, you can set the <code class="docutils literal"><span class="pre">stormpath.web.nonce.cache.name</span></code> configuration property and specify your own region name.</p>
<div class="admonition caution">
<p class="first admonition-title">Caution</p>
<p>Because the nonce cache region is used for CSRF (Cross Site Request Forgery) attack prevention, any TTL or TTI specified for this region <em>must</em> be longer than the CSRF token TTL. By default, the CSRF token TTL is 1 hour (3,600,000 milliseconds), so you must ensure that the nonce cache region has the same or longer TTL and TTI.</p>
<p class="last">Also, if you change the CSRF token TTL (via the <code class="docutils literal"><span class="pre">stormpath.web.csrf.token.ttl</span></code> property), you <em>must</em> ensure the nonce cache region TTL and TTI are both longer than the CSRF token TTL (even if it is just by 1 second).</p>
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