| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 1 | <html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>Apache Tomcat 7 Configuration Reference (7.0.77) - The Manager Component</title><meta name="author" content="Craig R. McClanahan"><meta name="author" content="Yoav Shapira"><style type="text/css" media="print">
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| 79 | </style></head><body bgcolor="#ffffff" text="#000000" link="#525D76" alink="#525D76" vlink="#525D76"><table border="0" width="100%" cellspacing="0"><!--PAGE HEADER--><tr><td><!--PROJECT LOGO--><a href="http://tomcat.apache.org/"><img src="../images/tomcat.gif" align="right" alt="
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 80 | The Apache Tomcat Servlet/JSP Container
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| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 81 | " border="0"></a></td><td><h1><font face="arial,helvetica,sanserif">Apache Tomcat 7</font></h1><font face="arial,helvetica,sanserif">Version 7.0.77, Mar 28 2017</font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img src="../images/asf-logo.svg" align="right" alt="Apache Logo" border="0" style="width: 266px;height: 83px;"></a></td></tr></table><table border="0" width="100%" cellspacing="4"><!--HEADER SEPARATOR--><tr><td colspan="2"><hr noshade size="1"></td></tr><tr><!--LEFT SIDE NAVIGATION--><td width="20%" valign="top" nowrap class="noPrint"><p><strong>Links</strong></p><ul><li><a href="../index.html">Docs Home</a></li><li><a href="index.html">Config Ref. Home</a></li><li><a href="http://wiki.apache.org/tomcat/FAQ">FAQ</a></li><li><a href="#comments_section">User Comments</a></li></ul><p><strong>Top Level Elements</strong></p><ul><li><a href="server.html">Server</a></li><li><a href="service.html">Service</a></li></ul><p><strong>Executors</strong></p><ul><li><a href="executor.html">Executor</a></li></ul><p><strong>Connectors</strong></p><ul><li><a href="http.html">HTTP</a></li><li><a href="ajp.html">AJP</a></li></ul><p><strong>Containers</strong></p><ul><li><a href="context.html">Context</a></li><li><a href="engine.html">Engine</a></li><li><a href="host.html">Host</a></li><li><a href="cluster.html">Cluster</a></li></ul><p><strong>Nested Components</strong></p><ul><li><a href="globalresources.html">Global Resources</a></li><li><a href="jar-scanner.html">JarScanner</a></li><li><a href="listeners.html">Listeners</a></li><li><a href="loader.html">Loader</a></li><li><a href="manager.html">Manager</a></li><li><a href="realm.html">Realm</a></li><li><a href="resources.html">Resources</a></li><li><a href="sessionidgenerator.html">SessionIdGenerator</a></li><li><a href="valve.html">Valve</a></li></ul><p><strong>Cluster Elements</strong></p><ul><li><a href="cluster.html">Cluster</a></li><li><a href="cluster-manager.html">Manager</a></li><li><a href="cluster-channel.html">Channel</a></li><li><a href="cluster-membership.html">Channel/Membership</a></li><li><a href="cluster-sender.html">Channel/Sender</a></li><li><a href="cluster-receiver.html">Channel/Receiver</a></li><li><a href="cluster-interceptor.html">Channel/Interceptor</a></li><li><a href="cluster-valve.html">Valve</a></li><li><a href="cluster-deployer.html">Deployer</a></li><li><a href="cluster-listener.html">ClusterListener</a></li></ul><p><strong>web.xml</strong></p><ul><li><a href="filter.html">Filter</a></li></ul><p><strong>Other</strong></p><ul><li><a href="systemprops.html">System properties</a></li></ul></td><!--RIGHT SIDE MAIN BODY--><td width="80%" valign="top" align="left" id="mainBody"><h1>The Manager Component</h1><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Table of Contents"><!--()--></a><a name="Table_of_Contents"><strong>Table of Contents</strong></a></font></td></tr><tr><td><blockquote>
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 82 | <ul><li><a href="#Introduction">Introduction</a></li><li><a href="#Attributes">Attributes</a><ol><li><a href="#Common_Attributes">Common Attributes</a></li><li><a href="#Standard_Implementation">Standard Implementation</a></li></ol></li><li><a href="#Nested_Components">Nested Components</a></li><li><a href="#Special_Features">Special Features</a><ol><li><a href="#Persistence_Across_Restarts">Persistence Across Restarts</a></li><li><a href="#Disable_Session_Persistence">Disable Session Persistence</a></li></ol></li></ul>
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| 83 | </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Introduction"><strong>Introduction</strong></a></font></td></tr><tr><td><blockquote>
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| 84 |
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| 85 | <p>The <strong>Manager</strong> element represents the <em>session
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| 86 | manager</em> that will be used to create and maintain HTTP sessions
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| 87 | as requested by the associated web application.</p>
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| 88 |
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| 89 | <p>A Manager element MAY be nested inside a
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| 90 | <a href="context.html">Context</a> component. If it is not included,
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| 91 | a default Manager configuration will be created automatically, which
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| 92 | is sufficient for most requirements, — see
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| 93 | <em>Standard Manager Implementation</em> below for the details
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| 94 | of this configuration.</p>
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| 95 |
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| 96 | </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Attributes"><strong>Attributes</strong></a></font></td></tr><tr><td><blockquote>
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| 97 |
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| 98 | <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Common Attributes"><!--()--></a><a name="Common_Attributes"><strong>Common Attributes</strong></a></font></td></tr><tr><td><blockquote>
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| 99 |
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| 100 | <p>All implementations of <strong>Manager</strong>
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| 101 | support the following attributes:</p>
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| 102 |
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| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 103 | <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">className</code></td><td align="left" valign="center">
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 104 | <p>Java class name of the implementation to use. This class must
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| 105 | implement the <code>org.apache.catalina.Manager</code> interface.
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| 106 | If not specified, the standard value (defined below) will be used.</p>
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| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 107 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">distributable</code></td><td align="left" valign="center">
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| 108 | <p><strong>Deprecated</strong>: This should be configured via the
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| 109 | Context.</p>
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 110 | <p>Set to <code>true</code> to ask the session manager to enforce
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| 111 | the restrictions described in the Servlet Specification on
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| 112 | distributable applications (primarily, this would mean that all
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| 113 | session attributes must implement <code>java.io.Serializable</code>).
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| 114 | Set to <code>false</code> (the default) to not enforce these
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| 115 | restrictions.</p>
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| 116 |
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| 117 | <p><strong>NOTE</strong> - The value for this property is inherited
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| 118 | automatically based on the presence or absence of the
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| 119 | <code><distributable></code> element in the web application
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| 120 | deployment descriptor (<code>/WEB-INF/web.xml</code>).</p>
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| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 121 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxActiveSessions</code></td><td align="left" valign="center">
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| 122 | <p>The maximum number of active sessions that will be created by
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| 123 | this Manager, or <code>-1</code> (the default) for no limit.</p>
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| 124 |
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| 125 | <p>When the limit is reached, any attempt to create a new session
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| 126 | (e.g. with <code>HttpServletRequest.getSession()</code> call)
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| 127 | will fail with an <code>IllegalStateException</code>.</p>
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| 128 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxInactiveInterval</code></td><td align="left" valign="center">
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| 129 | <p><strong>Deprecated</strong>: This should be configured via the
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| 130 | Context.</p>
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| 131 | <p>The initial maximum time interval, in seconds,
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| 132 | between client requests before a session is invalidated. A negative value
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| 133 | will result in sessions never timing out. If the attribute is not provided,
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| 134 | a default of 1800 seconds (30 minutes) is used.</p>
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| 135 |
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| 136 | <p>This attribute provides the initial value whenever a
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| 137 | new session is created, but the interval may be dynamically
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| 138 | varied by a servlet via the
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| 139 | <code>setMaxInactiveInterval</code> method of the <code>HttpSession</code> object.</p>
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| 140 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">sessionIdLength</code></td><td align="left" valign="center">
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| 141 | <p>The length of session ids created by this Manager, measured in bytes,
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| 142 | excluding subsequent conversion to a hexadecimal string and
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| 143 | excluding any JVM route information used for load balancing.
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| 144 | The default is 16. You should set the length on a nested
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| 145 | <strong>SessionIdGenerator</strong> element instead.</p>
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 146 | </td></tr></table>
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| 147 |
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| 148 | </blockquote></td></tr></table>
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| 149 |
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| 150 |
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| 151 | <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Standard Implementation"><!--()--></a><a name="Standard_Implementation"><strong>Standard Implementation</strong></a></font></td></tr><tr><td><blockquote>
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| 152 |
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| 153 | <p>Tomcat provides two standard implementations of <strong>Manager</strong>
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| 154 | for use — the default one stores active sessions, while the optional one
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| 155 | stores active sessions that have been swapped out (in addition to saving
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| 156 | sessions across a restart of Tomcat) in a storage location that is selected
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| 157 | via the use of an appropriate <strong>Store</strong> nested element.</p>
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| 158 |
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| 159 | <h3>Standard Manager Implementation</h3>
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| 160 |
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| 161 | <p>The standard implementation of <strong>Manager</strong> is
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| 162 | <strong>org.apache.catalina.session.StandardManager</strong>.
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| 163 | It supports the following additional attributes (in addition to the
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| 164 | common attributes listed above):</p>
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| 165 |
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| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 166 | <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">pathname</code></td><td align="left" valign="center">
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 167 | <p>Absolute or relative (to the work directory for this Context)
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| 168 | pathname of the file in which session state will be preserved
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| 169 | across application restarts, if possible. The default is
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| 170 | "SESSIONS.ser".<br>See
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| 171 | <a href="#Persistence_Across_Restarts">Persistence Across Restarts</a>
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| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 172 | for more information. This persistence may be
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 173 | disabled by setting this attribute to an empty string.</p>
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| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 174 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">processExpiresFrequency</code></td><td align="left" valign="center">
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 175 | <p>Frequency of the session expiration, and related manager operations.
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| 176 | Manager operations will be done once for the specified amount of
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| 177 | backgroundProcess calls (i.e., the lower the amount, the more often the
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| 178 | checks will occur). The minimum value is 1, and the default value is 6.
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| 179 | </p>
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| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 180 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">secureRandomClass</code></td><td align="left" valign="center">
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| 181 | <p>Name of the Java class that extends
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| 182 | <code>java.security.SecureRandom</code> to use to generate session IDs.
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| 183 | If not specified, the default value is
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 184 | <code>java.security.SecureRandom</code>.</p>
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| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 185 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">secureRandomProvider</code></td><td align="left" valign="center">
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| 186 | <p>Name of the provider to use to create the
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| 187 | <code>java.security.SecureRandom</code> instances that generate session
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| 188 | IDs. If an invalid algorithm and/or provider is specified, the Manager
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| 189 | will use the platform default provider and the default algorithm. If not
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| 190 | specified, the platform default provider will be used.</p>
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| 191 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">secureRandomAlgorithm</code></td><td align="left" valign="center">
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| 192 | <p>Name of the algorithm to use to create the
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| 193 | <code>java.security.SecureRandom</code> instances that generate session
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| 194 | IDs. If an invalid algorithm and/or provider is specified, the Manager
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| 195 | will use the platform default provider and the default algorithm. If not
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| 196 | specified, the default algorithm of SHA1PRNG will be used. If the
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| 197 | default algorithm is not supported, the platform default will be used.
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| 198 | To specify that the platform default should be used, do not set the
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| 199 | secureRandomProvider attribute and set this attribute to the empty
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| 200 | string.</p>
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| 201 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">sessionAttributeNameFilter</code></td><td align="left" valign="center">
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| 202 | <p>A regular expression used to filter which session attributes will be
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| 203 | distributed. An attribute will only be distributed if its name matches
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| 204 | this pattern. If the pattern is zero length or <code>null</code>, all
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| 205 | attributes are eligible for distribution. The pattern is anchored so the
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| 206 | session attribute name must fully match the pattern. As an example, the
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| 207 | value <code>(userName|sessionHistory)</code> will only distribute the
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| 208 | two session attributes named <code>userName</code> and
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| 209 | <code>sessionHistory</code>. If not specified, the default value of
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| 210 | <code>null</code> will be used.</p>
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| 211 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">sessionAttributeValueClassNameFilter</code></td><td align="left" valign="center">
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| 212 | <p>A regular expression used to filter which session attributes will be
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| 213 | distributed. An attribute will only be distributed if the implementation
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| 214 | class name of the value matches this pattern. If the pattern is zero
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| 215 | length or <code>null</code>, all attributes are eligible for
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| 216 | distribution. The pattern is anchored so the fully qualified class name
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| 217 | must fully match the pattern. If not specified, the default value of
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| 218 | <code>null</code> will be used unless a <code>SecurityManager</code> is
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| 219 | enabled in which case the default will be
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| 220 | <code>java\\.lang\\.(?:Boolean|Integer|Long|Number|String)</code>.</p>
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| 221 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">warnOnSessionAttributeFilterFailure</code></td><td align="left" valign="center">
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| 222 | <p>If <strong>sessionAttributeNameFilter</strong> or
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| 223 | <strong>sessionAttributeValueClassNameFilter</strong> blocks an
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| 224 | attribute, should this be logged at <code>WARN</code> level? If
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| 225 | <code>WARN</code> level logging is disabled then it will be logged at
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| 226 | <code>DEBUG</code>. The default value of this attribute is
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| 227 | <code>false</code> unless a <code>SecurityManager</code> is enabled in
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| 228 | which case the default will be <code>true</code>.</p>
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 229 | </td></tr></table>
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| 230 |
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| 231 | <h3>Persistent Manager Implementation</h3>
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| 232 |
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 233 | <p><strong>NOTE:</strong> You must set either the
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| 234 | <code>org.apache.catalina.session.StandardSession.ACTIVITY_CHECK</code> or
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| 235 | <code>org.apache.catalina.STRICT_SERVLET_COMPLIANCE</code>
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| 236 | <a href="systemprops.html">system properties</a> to <code>true</code> for
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| 237 | the persistent manager to work correctly.</p>
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| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 238 |
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 239 | <p>The persistent implementation of <strong>Manager</strong> is
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| 240 | <strong>org.apache.catalina.session.PersistentManager</strong>. In
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| 241 | addition to the usual operations of creating and deleting sessions, a
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| 242 | <code>PersistentManager</code> has the capability to swap active (but
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| 243 | idle) sessions out to a persistent storage mechanism, as well as to save
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| 244 | all sessions across a normal restart of Tomcat. The actual persistent
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| 245 | storage mechanism used is selected by your choice of a
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| 246 | <strong>Store</strong> element nested inside the <strong>Manager</strong>
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| 247 | element - this is required for use of <code>PersistentManager</code>.</p>
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| 248 |
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| 249 | <p>This implementation of Manager supports the following attributes in
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| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 250 | addition to the <a href="#Common_Attributes">Common Attributes</a>
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 251 | described earlier.</p>
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| 252 |
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| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 253 | <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><strong><code class="attributeName">className</code></strong></td><td align="left" valign="center">
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| 254 | <p>It has the same meaning as described in the
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| 255 | <a href="#Common_Attributes">Common Attributes</a> above.
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 256 | You <strong>must</strong> specify
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| 257 | <code>org.apache.catalina.session.PersistentManager</code> to use
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| 258 | this manager implementation.</p>
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| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 259 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxIdleBackup</code></td><td align="left" valign="center">
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 260 | <p>The time interval (in seconds) since the last access to a session
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| 261 | before it is eligible for being persisted to the session store, or
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| 262 | <code>-1</code> to disable this feature. By default, this feature is
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| 263 | disabled.</p>
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| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 264 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxIdleSwap</code></td><td align="left" valign="center">
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| 265 | <p>The maximum time a session may be idle before it is eligible to be
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| 266 | swapped to disk due to inactivity. Setting this to <code>-1</code> means
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| 267 | sessions should not be swapped out just because of inactivity. If this
|
| 268 | feature is enabled, the time interval specified here should be equal to
|
| 269 | or longer than the value specified for <code>maxIdleBackup</code>. By
|
| 270 | default, this feature is disabled.</p>
|
| 271 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">minIdleSwap</code></td><td align="left" valign="center">
|
| 272 | <p>The minimum time in seconds a session must be idle before it is
|
| 273 | eligible to be swapped to disk to keep the active session count below
|
| 274 | maxActiveSessions. Setting to <code>-1</code> means sessions will not be
|
| 275 | swapped out to keep the active session count down. If specified, this
|
| 276 | value should be less than that specified by <code>maxIdleSwap</code>.
|
| 277 | By default, this value is set to <code>-1</code>.</p>
|
| 278 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">processExpiresFrequency</code></td><td align="left" valign="center">
|
| 279 | <p>It is the same as described above for the
|
| 280 | <code>org.apache.catalina.session.StandardManager</code> class.
|
| 281 | </p>
|
| 282 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">saveOnRestart</code></td><td align="left" valign="center">
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 283 | <p>Should all sessions be persisted and reloaded when Tomcat is shut
|
| 284 | down and restarted (or when this application is reloaded)? By default,
|
| 285 | this attribute is set to <code>true</code>.</p>
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 286 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">secureRandomClass</code></td><td align="left" valign="center">
|
| 287 | <p>It is the same as described above for the
|
| 288 | <code>org.apache.catalina.session.StandardManager</code> class.
|
| 289 | </p>
|
| 290 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">secureRandomProvider</code></td><td align="left" valign="center">
|
| 291 | <p>It is the same as described above for the
|
| 292 | <code>org.apache.catalina.session.StandardManager</code> class.
|
| 293 | </p>
|
| 294 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">secureRandomAlgorithm</code></td><td align="left" valign="center">
|
| 295 | <p>It is the same as described above for the
|
| 296 | <code>org.apache.catalina.session.StandardManager</code> class.
|
| 297 | </p>
|
| 298 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">sessionAttributeNameFilter</code></td><td align="left" valign="center">
|
| 299 | <p>A regular expression used to filter which session attributes will be
|
| 300 | distributed. An attribute will only be distributed if its name matches
|
| 301 | this pattern. If the pattern is zero length or <code>null</code>, all
|
| 302 | attributes are eligible for distribution. The pattern is anchored so the
|
| 303 | session attribute name must fully match the pattern. As an example, the
|
| 304 | value <code>(userName|sessionHistory)</code> will only distribute the
|
| 305 | two session attributes named <code>userName</code> and
|
| 306 | <code>sessionHistory</code>. If not specified, the default value of
|
| 307 | <code>null</code> will be used.</p>
|
| 308 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">sessionAttributeValueClassNameFilter</code></td><td align="left" valign="center">
|
| 309 | <p>A regular expression used to filter which session attributes will be
|
| 310 | distributed. An attribute will only be distributed if the implementation
|
| 311 | class name of the value matches this pattern. If the pattern is zero
|
| 312 | length or <code>null</code>, all attributes are eligible for
|
| 313 | distribution. The pattern is anchored so the fully qualified class name
|
| 314 | must fully match the pattern. If not specified, the default value of
|
| 315 | <code>null</code> will be used unless a <code>SecurityManager</code> is
|
| 316 | enabled in which case the default will be
|
| 317 | <code>java\\.lang\\.(?:Boolean|Integer|Long|Number|String)</code>.</p>
|
| 318 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">warnOnSessionAttributeFilterFailure</code></td><td align="left" valign="center">
|
| 319 | <p>If <strong>sessionAttributeNameFilter</strong> or
|
| 320 | <strong>sessionAttributeValueClassNameFilter</strong> blocks an
|
| 321 | attribute, should this be logged at <code>WARN</code> level? If
|
| 322 | <code>WARN</code> level logging is disabled then it will be logged at
|
| 323 | <code>DEBUG</code>. The default value of this attribute is
|
| 324 | <code>false</code> unless a <code>SecurityManager</code> is enabled in
|
| 325 | which case the default will be <code>true</code>.</p>
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 326 | </td></tr></table>
|
| 327 |
|
| 328 | <p>In order to successfully use a PersistentManager, you must nest inside
|
| 329 | it a <strong><Store></strong> element, as described below.</p>
|
| 330 |
|
| 331 | </blockquote></td></tr></table>
|
| 332 |
|
| 333 |
|
| 334 | </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Nested Components"><!--()--></a><a name="Nested_Components"><strong>Nested Components</strong></a></font></td></tr><tr><td><blockquote>
|
| 335 |
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 336 | <h3>All Manager Implementations</h3>
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 337 |
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 338 | <p>All Manager implementations bundled with Tomcat or extending
|
| 339 | <code>ManagerBase</code> allow nesting of a
|
| 340 | <strong><SessionIdGenerator></strong> element. It defines
|
| 341 | the behavior of session id generation. All implementations
|
| 342 | of the <a href="sessionidgenerator.html">SessionIdGenerator</a> allow the
|
| 343 | following attributes:
|
| 344 | </p>
|
| 345 |
|
| 346 | <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">sessionIdLength</code></td><td align="left" valign="center">
|
| 347 | <p>The length of the session ID may be changed with the
|
| 348 | <strong>sessionIdLength</strong> attribute.
|
| 349 | </p>
|
| 350 | </td></tr></table>
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 351 |
|
| 352 | <h3>Persistent Manager Implementation</h3>
|
| 353 |
|
| 354 | <p>If you are using the <em>Persistent Manager Implementation</em>
|
| 355 | as described above, you <strong>MUST</strong> nest a
|
| 356 | <strong><Store></strong> element inside, which defines the
|
| 357 | characteristics of the persistent data storage. Two implementations
|
| 358 | of the <code><Store></code> element are currently available,
|
| 359 | with different characteristics, as described below.</p>
|
| 360 |
|
| 361 | <h5>File Based Store</h5>
|
| 362 |
|
| 363 | <p>The <em>File Based Store</em> implementation saves swapped out
|
| 364 | sessions in individual files (named based on the session identifier)
|
| 365 | in a configurable directory. Therefore, you are likely to encounter
|
| 366 | scalability problems as the number of active sessions increases, and
|
| 367 | this should primarily be considered a means to easily experiment.</p>
|
| 368 |
|
| 369 | <p>To configure this, add a <code><Store></code> nested inside
|
| 370 | your <code><Manager></code> element with the following attributes:
|
| 371 | </p>
|
| 372 |
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 373 | <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">checkInterval</code></td><td align="left" valign="center">
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 374 | <p>The interval (in seconds) between checks for expired sessions
|
| 375 | among those sessions that are currently swapped out. By default,
|
| 376 | this interval is set to 60 seconds (one minute).</p>
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 377 | </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">className</code></strong></td><td align="left" valign="center">
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 378 | <p>Java class name of the implementation to use. This class must
|
| 379 | implement the <code>org.apache.catalina.Store</code> interface. You
|
| 380 | <strong>must</strong> specify
|
| 381 | <code>org.apache.catalina.session.FileStore</code>
|
| 382 | to use this implementation.</p>
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 383 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">directory</code></td><td align="left" valign="center">
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 384 | <p>Absolute or relative (to the temporary work directory for this web
|
| 385 | application) pathname of the directory into which individual session
|
| 386 | files are written. If not specified, the temporary work directory
|
| 387 | assigned by the container is utilized.</p>
|
| 388 | </td></tr></table>
|
| 389 |
|
| 390 |
|
| 391 | <h5>JDBC Based Store</h5>
|
| 392 |
|
| 393 | <p>The <em>JDBC Based Store</em> implementation saves swapped out
|
| 394 | sessions in individual rows of a preconfigured table in a database
|
| 395 | that is accessed via a JDBC driver. With large numbers of swapped out
|
| 396 | sessions, this implementation will exhibit improved performance over
|
| 397 | the File Based Store described above.</p>
|
| 398 |
|
| 399 | <p>To configure this, add a <code><Store></code> nested inside
|
| 400 | your <code><Manager></code> element with the following attributes:
|
| 401 | </p>
|
| 402 |
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 403 | <table border="1" cellpadding="5"><tr><th width="15%" bgcolor="#023264"><font color="#ffffff">Attribute</font></th><th width="85%" bgcolor="#023264"><font color="#ffffff">Description</font></th></tr><tr><td align="left" valign="center"><code class="attributeName">checkInterval</code></td><td align="left" valign="center">
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 404 | <p>The interval (in seconds) between checks for expired sessions
|
| 405 | among those sessions that are currently swapped out. By default,
|
| 406 | this interval is set to 60 seconds (one minute).</p>
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 407 | </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">className</code></strong></td><td align="left" valign="center">
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 408 | <p>Java class name of the implementation to use. This class must
|
| 409 | implement the <code>org.apache.catalina.Store</code> interface. You
|
| 410 | <strong>must</strong> specify
|
| 411 | <code>org.apache.catalina.session.JDBCStore</code>
|
| 412 | to use this implementation.</p>
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 413 | </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">connectionURL</code></strong></td><td align="left" valign="center">
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 414 | <p>The connection URL that will be handed to the configured JDBC
|
| 415 | driver to establish a connection to the database containing our
|
| 416 | session table.</p>
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 417 | </td></tr><tr><td align="left" valign="center"><code class="attributeName">dataSourceName</code></td><td align="left" valign="center">
|
| 418 | <p>Name of the JNDI resource for a JDBC DataSource-factory. If this option
|
| 419 | is given and a valid JDBC resource can be found, it will be used and any
|
| 420 | direct configuration of a JDBC connection via <code>connectionURL</code>
|
| 421 | and <code>driverName</code> will be ignored. Since this code uses prepared
|
| 422 | statements, you might want to configure pooled prepared statements as
|
| 423 | shown in <a href="../jndi-resources-howto.html">the JNDI resources
|
| 424 | HOW-TO</a>.</p>
|
| 425 | </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">driverName</code></strong></td><td align="left" valign="center">
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 426 | <p>Java class name of the JDBC driver to be used.</p>
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 427 | </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">sessionAppCol</code></strong></td><td align="left" valign="center">
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 428 | <p>Name of the database column, contained in the specified session
|
| 429 | table, that contains the Engine, Host, and Web Application Context
|
| 430 | name in the format <code>/Engine/Host/Context</code>.</p>
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 431 | </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">sessionDataCol</code></strong></td><td align="left" valign="center">
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 432 | <p>Name of the database column, contained in the specified
|
| 433 | session table, that contains the serialized form of all session
|
| 434 | attributes for a swapped out session. The column type must accept
|
| 435 | a binary object (typically called a BLOB).</p>
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 436 | </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">sessionIdCol</code></strong></td><td align="left" valign="center">
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 437 | <p>Name of the database column, contained in the specified
|
| 438 | session table, that contains the session identifier of the
|
| 439 | swapped out session. The column type must accept character
|
| 440 | string data of at least as many characters as are contained
|
| 441 | in session identifiers created by Tomcat (typically 32).</p>
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 442 | </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">sessionLastAccessedCol</code></strong></td><td align="left" valign="center">
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 443 | <p>Name of the database column, contained in the specified
|
| 444 | session table, that contains the <code>lastAccessedTime</code>
|
| 445 | property of this session. The column type must accept a
|
| 446 | Java <code>long</code> (64 bits).</p>
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 447 | </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">sessionMaxInactiveCol</code></strong></td><td align="left" valign="center">
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 448 | <p>Name of the database column, contained in the specified
|
| 449 | session table, that contains the <code>maxInactiveInterval</code>
|
| 450 | property of this session. The column type must accept a
|
| 451 | Java <code>integer</code> (32 bits).</p>
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 452 | </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">sessionTable</code></strong></td><td align="left" valign="center">
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 453 | <p>Name of the database table to be used for storing swapped out
|
| 454 | sessions. This table must contain (at least) the database columns
|
| 455 | that are configured by the other attributes of this element.</p>
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 456 | </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">sessionValidCol</code></strong></td><td align="left" valign="center">
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 457 | <p>Name of the database column, contained in the specified
|
| 458 | session table, that contains a flag indicating whether this
|
| 459 | swapped out session is still valid or not. The column type
|
| 460 | must accept a single character.</p>
|
| 461 | </td></tr></table>
|
| 462 |
|
| 463 | <p>Before attempting to use the JDBC Based Store for the first time,
|
| 464 | you must create the table that will be used to store swapped out sessions.
|
| 465 | Detailed SQL commands vary depending on the database you are using, but
|
| 466 | a script like this will generally be required:</p>
|
| 467 |
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 468 | <div class="codeBox"><pre><code>create table tomcat_sessions (
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 469 | session_id varchar(100) not null primary key,
|
| 470 | valid_session char(1) not null,
|
| 471 | max_inactive int not null,
|
| 472 | last_access bigint not null,
|
| 473 | app_name varchar(255),
|
| 474 | session_data mediumblob,
|
| 475 | KEY kapp_name(app_name)
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 476 | );</code></pre></div>
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 477 |
|
| 478 | <p>In order for the JDBC Based Store to successfully connect to your
|
| 479 | database, the JDBC driver you configure must be visible to Tomcat's
|
| 480 | internal class loader. Generally, that means you must place the JAR
|
| 481 | file containing this driver into the <code>$CATALINA_HOME/lib</code>
|
| 482 | directory.</p>
|
| 483 |
|
| 484 | </blockquote></td></tr></table><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Special Features"><!--()--></a><a name="Special_Features"><strong>Special Features</strong></a></font></td></tr><tr><td><blockquote>
|
| 485 |
|
| 486 |
|
| 487 | <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Persistence Across Restarts"><!--()--></a><a name="Persistence_Across_Restarts"><strong>Persistence Across Restarts</strong></a></font></td></tr><tr><td><blockquote>
|
| 488 |
|
| 489 | <p>Whenever Apache Tomcat is shut down normally and restarted, or when an
|
| 490 | application reload is triggered, the standard Manager implementation
|
| 491 | will attempt to serialize all currently active sessions to a disk
|
| 492 | file located via the <code>pathname</code> attribute. All such saved
|
| 493 | sessions will then be deserialized and activated (assuming they have
|
| 494 | not expired in the mean time) when the application reload is completed.</p>
|
| 495 |
|
| 496 | <p>In order to successfully restore the state of session attributes,
|
| 497 | all such attributes MUST implement the <code>java.io.Serializable</code>
|
| 498 | interface. You MAY cause the Manager to enforce this restriction by
|
| 499 | including the <code><distributable></code> element in your web
|
| 500 | application deployment descriptor (<code>/WEB-INF/web.xml</code>).</p>
|
| 501 |
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 502 | <p>The persistence across restarts provided by the
|
| 503 | <strong>StandardManager</strong> is a simpler implementation than that
|
| 504 | provided by the <strong>PersistentManager</strong>. If robust, production
|
| 505 | quality persistence across restarts is required then the
|
| 506 | <strong>PersistentManager</strong> should be used with an appropriate
|
| 507 | configuration.</p>
|
| 508 |
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 509 | </blockquote></td></tr></table>
|
| 510 |
|
| 511 | <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Disable Session Persistence"><!--()--></a><a name="Disable_Session_Persistence"><strong>Disable Session Persistence</strong></a></font></td></tr><tr><td><blockquote>
|
| 512 |
|
| 513 | <p>As documented above, every web application by default has
|
| 514 | standard manager implementation configured, and it performs session
|
| 515 | persistence across restarts. To disable this persistence feature, create
|
| 516 | a <a href="context.html">Context</a> configuration file for your web
|
| 517 | application and add the following element there:</p>
|
| 518 |
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 519 | <div class="codeBox"><pre><code><Manager pathname="" /></code></pre></div>
|
| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 520 | </blockquote></td></tr></table>
|
| 521 |
|
| 刘洪青 | 6266f99 | 2017-05-15 21:21:03 +0800 | [diff] [blame^] | 522 | </blockquote></td></tr></table></td></tr><tr class="noPrint"><td width="20%" valign="top" nowrap class="noPrint"></td><td width="80%" valign="top" align="left"><table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#525D76"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="comments_section" id="comments_section"><strong>Comments</strong></a></font></td></tr><tr><td><blockquote><p class="notice"><strong>Notice: </strong>This comments section collects your suggestions
|
| 523 | on improving documentation for Apache Tomcat.<br><br>
|
| 524 | If you have trouble and need help, read
|
| 525 | <a href="http://tomcat.apache.org/findhelp.html">Find Help</a> page
|
| 526 | and ask your question on the tomcat-users
|
| 527 | <a href="http://tomcat.apache.org/lists.html">mailing list</a>.
|
| 528 | Do not ask such questions here. This is not a Q&A section.<br><br>
|
| 529 | The Apache Comments System is explained <a href="../comments.html">here</a>.
|
| 530 | Comments may be removed by our moderators if they are either
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| 539 | s.async = true;
|
| 540 | s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier;
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| 541 | (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s);
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| 542 | }
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| 543 | else {
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| 544 | d.write('<div id="comments_thread"><strong>Comments are disabled for this page at the moment.<\/strong><\/div>');
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| 545 | }
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| 546 | })(window, document);
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| 547 | //--><!]]></script></blockquote></td></tr></table></td></tr><!--FOOTER SEPARATOR--><tr><td colspan="2"><hr noshade size="1"></td></tr><!--PAGE FOOTER--><tr><td colspan="2"><div align="center"><font color="#525D76" size="-1"><em>
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| 548 | Copyright © 1999-2017, Apache Software Foundation
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| Hongqing Liu | fd5ee81 | 2014-05-10 16:32:51 +0800 | [diff] [blame] | 549 | </em></font></div></td></tr></table></body></html> |