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<div class="subTitle">org.apache.shiro.web.filter.session</div>
<h2 title="Class NoSessionCreationFilter" class="title">Class NoSessionCreationFilter</h2>
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<ul class="inheritance">
<li><a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../../../../org/apache/shiro/web/servlet/ServletContextSupport.html" title="class in org.apache.shiro.web.servlet">org.apache.shiro.web.servlet.ServletContextSupport</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../../../../org/apache/shiro/web/servlet/AbstractFilter.html" title="class in org.apache.shiro.web.servlet">org.apache.shiro.web.servlet.AbstractFilter</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../../../../org/apache/shiro/web/servlet/NameableFilter.html" title="class in org.apache.shiro.web.servlet">org.apache.shiro.web.servlet.NameableFilter</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../../../../org/apache/shiro/web/servlet/OncePerRequestFilter.html" title="class in org.apache.shiro.web.servlet">org.apache.shiro.web.servlet.OncePerRequestFilter</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../../../../org/apache/shiro/web/servlet/AdviceFilter.html" title="class in org.apache.shiro.web.servlet">org.apache.shiro.web.servlet.AdviceFilter</a></li>
<li>
<ul class="inheritance">
<li><a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html" title="class in org.apache.shiro.web.filter">org.apache.shiro.web.filter.PathMatchingFilter</a></li>
<li>
<ul class="inheritance">
<li>org.apache.shiro.web.filter.session.NoSessionCreationFilter</li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
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</li>
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<dl>
<dt>All Implemented Interfaces:</dt>
<dd><a href="https://docs.oracle.com/javaee/5/api/javax/servlet/Filter.html?is-external=true" title="class or interface in javax.servlet">Filter</a>, <a href="../../../../../../org/apache/shiro/util/Nameable.html" title="interface in org.apache.shiro.util">Nameable</a>, <a href="../../../../../../org/apache/shiro/web/filter/PathConfigProcessor.html" title="interface in org.apache.shiro.web.filter">PathConfigProcessor</a></dd>
</dl>
<hr>
<br>
<pre>public class <a href="../../../../../../src-html/org/apache/shiro/web/filter/session/NoSessionCreationFilter.html#line.49">NoSessionCreationFilter</a>
extends <a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html" title="class in org.apache.shiro.web.filter">PathMatchingFilter</a></pre>
<div class="block">A <code>PathMatchingFilter</code> that will disable creating new Sessions during the request. This is a useful
filter to place in the front of any filter chains that may result in REST, SOAP or other service invocations that
are not intended to participate in a session.
<p/>
This filter enables the following behavior:
<ol>
<li>If a <code>Subject</code> does not yet have a Session by the time this filter is called, this filter effectively
disables all calls to <code>subject</code>.<a href="../../../../../../org/apache/shiro/subject/Subject.html#getSession--"><code>getSession()</code></a> and
<code>subject</code>.<a href="../../../../../../org/apache/shiro/subject/Subject.html#getSession-boolean-"><code>getSession(true)</code></a>. If either are called
during the request, an exception will be thrown.</li>
<li>
However, if the <code>Subject</code> already has an associated session before this filter is invoked, either because it
was created in another part of the application, or a filter higher in the chain created one, this filter has no
effect.
</li>
</ol>
Finally, calls to <code>subject.getSession(false)</code> (i.e. a <code>false</code> boolean value) will be unaffected
and may be called without repercussion in all cases.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.2</dd>
</dl>
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<h3>Fields inherited from class&nbsp;org.apache.shiro.web.filter.<a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html" title="class in org.apache.shiro.web.filter">PathMatchingFilter</a></h3>
<code><a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html#appliedPaths">appliedPaths</a>, <a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html#pathMatcher">pathMatcher</a></code></li>
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<h3>Fields inherited from class&nbsp;org.apache.shiro.web.servlet.<a href="../../../../../../org/apache/shiro/web/servlet/OncePerRequestFilter.html" title="class in org.apache.shiro.web.servlet">OncePerRequestFilter</a></h3>
<code><a href="../../../../../../org/apache/shiro/web/servlet/OncePerRequestFilter.html#ALREADY_FILTERED_SUFFIX">ALREADY_FILTERED_SUFFIX</a></code></li>
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<code><a href="../../../../../../org/apache/shiro/web/servlet/AbstractFilter.html#filterConfig">filterConfig</a></code></li>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/shiro/web/filter/session/NoSessionCreationFilter.html#NoSessionCreationFilter--">NoSessionCreationFilter</a></span>()</code>&nbsp;</td>
</tr>
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<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/shiro/web/filter/session/NoSessionCreationFilter.html#onPreHandle-javax.servlet.ServletRequest-javax.servlet.ServletResponse-java.lang.Object-">onPreHandle</a></span>(<a href="https://docs.oracle.com/javaee/5/api/javax/servlet/ServletRequest.html?is-external=true" title="class or interface in javax.servlet">ServletRequest</a>&nbsp;request,
<a href="https://docs.oracle.com/javaee/5/api/javax/servlet/ServletResponse.html?is-external=true" title="class or interface in javax.servlet">ServletResponse</a>&nbsp;response,
<a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;mappedValue)</code>
<div class="block">This default implementation always returns <code>true</code> and should be overridden by subclasses for custom
logic if necessary.</div>
</td>
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<h3>Methods inherited from class&nbsp;org.apache.shiro.web.filter.<a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html" title="class in org.apache.shiro.web.filter">PathMatchingFilter</a></h3>
<code><a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html#getPathWithinApplication-javax.servlet.ServletRequest-">getPathWithinApplication</a>, <a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html#isEnabled-javax.servlet.ServletRequest-javax.servlet.ServletResponse-java.lang.String-java.lang.Object-">isEnabled</a>, <a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html#pathsMatch-java.lang.String-javax.servlet.ServletRequest-">pathsMatch</a>, <a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html#pathsMatch-java.lang.String-java.lang.String-">pathsMatch</a>, <a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html#preHandle-javax.servlet.ServletRequest-javax.servlet.ServletResponse-">preHandle</a>, <a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html#processPathConfig-java.lang.String-java.lang.String-">processPathConfig</a></code></li>
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<h3>Methods inherited from class&nbsp;org.apache.shiro.web.servlet.<a href="../../../../../../org/apache/shiro/web/servlet/AdviceFilter.html" title="class in org.apache.shiro.web.servlet">AdviceFilter</a></h3>
<code><a href="../../../../../../org/apache/shiro/web/servlet/AdviceFilter.html#afterCompletion-javax.servlet.ServletRequest-javax.servlet.ServletResponse-java.lang.Exception-">afterCompletion</a>, <a href="../../../../../../org/apache/shiro/web/servlet/AdviceFilter.html#cleanup-javax.servlet.ServletRequest-javax.servlet.ServletResponse-java.lang.Exception-">cleanup</a>, <a href="../../../../../../org/apache/shiro/web/servlet/AdviceFilter.html#doFilterInternal-javax.servlet.ServletRequest-javax.servlet.ServletResponse-javax.servlet.FilterChain-">doFilterInternal</a>, <a href="../../../../../../org/apache/shiro/web/servlet/AdviceFilter.html#executeChain-javax.servlet.ServletRequest-javax.servlet.ServletResponse-javax.servlet.FilterChain-">executeChain</a>, <a href="../../../../../../org/apache/shiro/web/servlet/AdviceFilter.html#postHandle-javax.servlet.ServletRequest-javax.servlet.ServletResponse-">postHandle</a></code></li>
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<h3>Methods inherited from class&nbsp;org.apache.shiro.web.servlet.<a href="../../../../../../org/apache/shiro/web/servlet/OncePerRequestFilter.html" title="class in org.apache.shiro.web.servlet">OncePerRequestFilter</a></h3>
<code><a href="../../../../../../org/apache/shiro/web/servlet/OncePerRequestFilter.html#doFilter-javax.servlet.ServletRequest-javax.servlet.ServletResponse-javax.servlet.FilterChain-">doFilter</a>, <a href="../../../../../../org/apache/shiro/web/servlet/OncePerRequestFilter.html#getAlreadyFilteredAttributeName--">getAlreadyFilteredAttributeName</a>, <a href="../../../../../../org/apache/shiro/web/servlet/OncePerRequestFilter.html#isEnabled--">isEnabled</a>, <a href="../../../../../../org/apache/shiro/web/servlet/OncePerRequestFilter.html#isEnabled-javax.servlet.ServletRequest-javax.servlet.ServletResponse-">isEnabled</a>, <a href="../../../../../../org/apache/shiro/web/servlet/OncePerRequestFilter.html#setEnabled-boolean-">setEnabled</a>, <a href="../../../../../../org/apache/shiro/web/servlet/OncePerRequestFilter.html#shouldNotFilter-javax.servlet.ServletRequest-">shouldNotFilter</a></code></li>
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<h3>Methods inherited from class&nbsp;org.apache.shiro.web.servlet.<a href="../../../../../../org/apache/shiro/web/servlet/NameableFilter.html" title="class in org.apache.shiro.web.servlet">NameableFilter</a></h3>
<code><a href="../../../../../../org/apache/shiro/web/servlet/NameableFilter.html#getName--">getName</a>, <a href="../../../../../../org/apache/shiro/web/servlet/NameableFilter.html#setName-java.lang.String-">setName</a>, <a href="../../../../../../org/apache/shiro/web/servlet/NameableFilter.html#toStringBuilder--">toStringBuilder</a></code></li>
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<h3>Methods inherited from class&nbsp;org.apache.shiro.web.servlet.<a href="../../../../../../org/apache/shiro/web/servlet/AbstractFilter.html" title="class in org.apache.shiro.web.servlet">AbstractFilter</a></h3>
<code><a href="../../../../../../org/apache/shiro/web/servlet/AbstractFilter.html#destroy--">destroy</a>, <a href="../../../../../../org/apache/shiro/web/servlet/AbstractFilter.html#getFilterConfig--">getFilterConfig</a>, <a href="../../../../../../org/apache/shiro/web/servlet/AbstractFilter.html#getInitParam-java.lang.String-">getInitParam</a>, <a href="../../../../../../org/apache/shiro/web/servlet/AbstractFilter.html#init-javax.servlet.FilterConfig-">init</a>, <a href="../../../../../../org/apache/shiro/web/servlet/AbstractFilter.html#onFilterConfigSet--">onFilterConfigSet</a>, <a href="../../../../../../org/apache/shiro/web/servlet/AbstractFilter.html#setFilterConfig-javax.servlet.FilterConfig-">setFilterConfig</a></code></li>
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<h3>Methods inherited from class&nbsp;org.apache.shiro.web.servlet.<a href="../../../../../../org/apache/shiro/web/servlet/ServletContextSupport.html" title="class in org.apache.shiro.web.servlet">ServletContextSupport</a></h3>
<code><a href="../../../../../../org/apache/shiro/web/servlet/ServletContextSupport.html#getContextAttribute-java.lang.String-">getContextAttribute</a>, <a href="../../../../../../org/apache/shiro/web/servlet/ServletContextSupport.html#getContextInitParam-java.lang.String-">getContextInitParam</a>, <a href="../../../../../../org/apache/shiro/web/servlet/ServletContextSupport.html#getServletContext--">getServletContext</a>, <a href="../../../../../../org/apache/shiro/web/servlet/ServletContextSupport.html#removeContextAttribute-java.lang.String-">removeContextAttribute</a>, <a href="../../../../../../org/apache/shiro/web/servlet/ServletContextSupport.html#setContextAttribute-java.lang.String-java.lang.Object-">setContextAttribute</a>, <a href="../../../../../../org/apache/shiro/web/servlet/ServletContextSupport.html#setServletContext-javax.servlet.ServletContext-">setServletContext</a>, <a href="../../../../../../org/apache/shiro/web/servlet/ServletContextSupport.html#toString--">toString</a></code></li>
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<h3>Methods inherited from class&nbsp;java.lang.<a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<h3>Constructor Detail</h3>
<a name="NoSessionCreationFilter--">
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<h4>NoSessionCreationFilter</h4>
<pre>public&nbsp;<a href="../../../../../../src-html/org/apache/shiro/web/filter/session/NoSessionCreationFilter.html#line.49">NoSessionCreationFilter</a>()</pre>
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<a name="onPreHandle-javax.servlet.ServletRequest-javax.servlet.ServletResponse-java.lang.Object-">
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<h4>onPreHandle</h4>
<pre>protected&nbsp;boolean&nbsp;<a href="../../../../../../src-html/org/apache/shiro/web/filter/session/NoSessionCreationFilter.html#line.52">onPreHandle</a>(<a href="https://docs.oracle.com/javaee/5/api/javax/servlet/ServletRequest.html?is-external=true" title="class or interface in javax.servlet">ServletRequest</a>&nbsp;request,
<a href="https://docs.oracle.com/javaee/5/api/javax/servlet/ServletResponse.html?is-external=true" title="class or interface in javax.servlet">ServletResponse</a>&nbsp;response,
<a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;mappedValue)
throws <a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html#onPreHandle-javax.servlet.ServletRequest-javax.servlet.ServletResponse-java.lang.Object-">PathMatchingFilter</a></code></span></div>
<div class="block">This default implementation always returns <code>true</code> and should be overridden by subclasses for custom
logic if necessary.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html#onPreHandle-javax.servlet.ServletRequest-javax.servlet.ServletResponse-java.lang.Object-">onPreHandle</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html" title="class in org.apache.shiro.web.filter">PathMatchingFilter</a></code></dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>request</code> - the incoming ServletRequest</dd>
<dd><code>response</code> - the outgoing ServletResponse</dd>
<dd><code>mappedValue</code> - the filter-specific config value mapped to this filter in the URL rules mappings.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd><code>true</code> if the request should be able to continue, <code>false</code> if the filter will
handle the response directly.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/6/docs/api/java/lang/Exception.html?is-external=true" title="class or interface in java.lang">Exception</a></code> - if an error occurs</dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../org/apache/shiro/web/filter/PathMatchingFilter.html#isEnabled-javax.servlet.ServletRequest-javax.servlet.ServletResponse-java.lang.String-java.lang.Object-"><code>PathMatchingFilter.isEnabled(javax.servlet.ServletRequest, javax.servlet.ServletResponse, String, Object)</code></a></dd>
</dl>
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