291 lines
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291 lines
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HTML
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<html lang="en"><head><META http-equiv="Content-Type" content="text/html; charset=UTF-8"><link href="../images/docs-stylesheet.css" rel="stylesheet" type="text/css"><title>Apache Tomcat 8 Configuration Reference (8.0.53) - The Channel Interceptor object</title><meta name="author" content="Filip Hanik"><script type="application/javascript" data-comments-identifier="tomcat-8.0-doc/config/cluster-interceptor">
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</script></head><body><div id="wrapper"><header><div id="header"><div><div><div class="logo noPrint"><a href="https://tomcat.apache.org/"><img alt="Tomcat Home" src="../images/tomcat.png"></a></div><div style="height: 1px;"></div><div class="asfLogo noPrint"><a href="https://www.apache.org/" target="_blank"><img src="../images/asf-logo.svg" alt="The Apache Software Foundation" style="width: 266px; height: 83px;"></a></div><h1>Apache Tomcat 8 Configuration Reference</h1><div class="versionInfo">
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Version 8.0.53,
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<time datetime="2018-06-29">Jun 29 2018</time></div><div style="height: 1px;"></div><div style="clear: left;"></div></div></div></div></header><div id="middle"><div><div id="mainLeft" class="noprint"><div><nav><div><h2>Links</h2><ul><li><a href="../index.html">Docs Home</a></li><li><a href="index.html">Config Ref. Home</a></li><li><a href="https://wiki.apache.org/tomcat/FAQ">FAQ</a></li><li><a href="#comments_section">User Comments</a></li></ul></div><div><h2>Top Level Elements</h2><ul><li><a href="server.html">Server</a></li><li><a href="service.html">Service</a></li></ul></div><div><h2>Executors</h2><ul><li><a href="executor.html">Executor</a></li></ul></div><div><h2>Connectors</h2><ul><li><a href="http.html">HTTP</a></li><li><a href="ajp.html">AJP</a></li></ul></div><div><h2>Containers</h2><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></div><div><h2>Nested Components</h2><ul><li><a href="cookie-processor.html">CookieProcessor</a></li><li><a href="credentialhandler.html">CredentialHandler</a></li><li><a href="globalresources.html">Global Resources</a></li><li><a href="jar-scanner.html">JarScanner</a></li><li><a href="jar-scan-filter.html">JarScanFilter</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></div><div><h2>Cluster Elements</h2><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></div><div><h2>web.xml</h2><ul><li><a href="filter.html">Filter</a></li></ul></div><div><h2>Other</h2><ul><li><a href="systemprops.html">System properties</a></li></ul></div></nav></div></div><div id="mainRight"><div id="content"><h2>The Channel Interceptor object</h2><h3 id="Table_of_Contents">Table of Contents</h3><div class="text">
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<ul><li><a href="#Introduction">Introduction</a></li><li><a href="#Available_Interceptors">Available Interceptors</a></li><li><a href="#Static_Membership">Static Membership</a></li><li><a href="#Attributes">Attributes</a><ol><li><a href="#Common_Attributes">Common Attributes</a></li><li><a href="#org.apache.catalina.tribes.group.interceptors.DomainFilterInterceptor_Attributes">org.apache.catalina.tribes.group.interceptors.DomainFilterInterceptor Attributes</a></li><li><a href="#org.apache.catalina.tribes.group.interceptors.FragmentationInterceptor_Attributes">org.apache.catalina.tribes.group.interceptors.FragmentationInterceptor Attributes</a></li><li><a href="#org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor_Attributes">org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor Attributes</a></li><li><a href="#org.apache.catalina.tribes.group.interceptors.MessageDispatchInterceptor_Attributes">org.apache.catalina.tribes.group.interceptors.MessageDispatchInterceptor Attributes</a></li><li><a href="#org.apache.catalina.tribes.group.interceptors.TcpFailureDetector_Attributes">org.apache.catalina.tribes.group.interceptors.TcpFailureDetector Attributes</a></li><li><a href="#org.apache.catalina.tribes.group.interceptors.TcpPingInterceptor_Attributes">org.apache.catalina.tribes.group.interceptors.TcpPingInterceptor Attributes</a></li><li><a href="#org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor_Attributes">org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor Attributes</a></li></ol></li><li><a href="#Nested_Components">Nested Components</a><ol><li><a href="#StaticMember_Attributes">StaticMember Attributes</a></li></ol></li></ul>
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</div><h3 id="Introduction">Introduction</h3><div class="text">
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<p>
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Apache Tribes supports an interceptor architecture to intercept both messages and membership notifications.
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This architecture allows decoupling of logic and opens the way for some very kewl feature add ons.
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</p>
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</div><h3 id="Available_Interceptors">Available Interceptors</h3><div class="text">
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<ul>
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<li><code>org.apache.catalina.tribes.group.interceptors.TcpFailureDetector</code></li>
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<li><code>org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor</code></li>
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<li><code>org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor</code></li>
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<li><code>org.apache.catalina.tribes.group.interceptors.MessageDispatchInterceptor</code></li>
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<li><code>org.apache.catalina.tribes.group.interceptors.NonBlockingCoordinator</code></li>
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<li><code>org.apache.catalina.tribes.group.interceptors.OrderInterceptor</code></li>
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<li><code>org.apache.catalina.tribes.group.interceptors.SimpleCoordinator</code></li>
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<li><code>org.apache.catalina.tribes.group.interceptors.StaticMembershipInterceptor</code></li>
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<li><code>org.apache.catalina.tribes.group.interceptors.TwoPhaseCommitInterceptor</code></li>
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<li><code>org.apache.catalina.tribes.group.interceptors.DomainFilterInterceptor</code></li>
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<li><code>org.apache.catalina.tribes.group.interceptors.FragmentationInterceptor</code></li>
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<li><code>org.apache.catalina.tribes.group.interceptors.GzipInterceptor</code></li>
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<li><code>org.apache.catalina.tribes.group.interceptors.TcpPingInterceptor</code></li>
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</ul>
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</div><h3 id="Static_Membership">Static Membership</h3><div class="text">
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<p>
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In addition to dynamic discovery, Apache Tribes also supports static membership, with membership verification.
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To achieve this add the <code>org.apache.catalina.tribes.group.interceptors.StaticMembershipInterceptor</code>
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after the <code>org.apache.catalina.tribes.group.interceptors.TcpFailureDetector</code> interceptor.
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Inside the <code>StaticMembershipInterceptor</code> you can add the static members you wish to have.
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The <code>TcpFailureDetector</code> will do a health check on the static members,and also monitor them for crashes
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so they will have the same level of notification mechanism as the members that are automatically discovered.</p>
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<div class="codeBox"><pre><code> <Interceptor className="org.apache.catalina.tribes.group.interceptors.StaticMembershipInterceptor">
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<LocalMember className="org.apache.catalina.tribes.membership.StaticMember"
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domain="staging-cluster"
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uniqueId="{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,1}"/>
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<Member className="org.apache.catalina.tribes.membership.StaticMember"
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port="5678"
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securePort="-1"
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host="tomcat01.mydomain.com"
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domain="staging-cluster"
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uniqueId="{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}"/>
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</Interceptor></code></pre></div>
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</div><h3 id="Attributes">Attributes</h3><div class="text">
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<div class="subsection"><h4 id="Common_Attributes">Common Attributes</h4><div class="text">
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<table class="defaultTable"><tr><th style="width: 15%;">
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Attribute
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</th><th style="width: 85%;">
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Description
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</th></tr><tr><td><strong><code class="attributeName">className</code></strong></td><td>
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Required, as there is no default
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</td></tr><tr><td><code class="attributeName">optionFlag</code></td><td>
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If you want the interceptor to trigger on certain message depending on the message's option flag,
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you can setup the interceptors flag here.
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The default value is <code>0</code>, meaning this interceptor will trigger on all messages.
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</td></tr></table>
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</div></div>
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<div class="subsection"><h4 id="org.apache.catalina.tribes.group.interceptors.DomainFilterInterceptor_Attributes">org.apache.catalina.tribes.group.interceptors.DomainFilterInterceptor Attributes</h4><div class="text">
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<table class="defaultTable"><tr><th style="width: 15%;">
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Attribute
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</th><th style="width: 85%;">
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Description
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</th></tr><tr><td><strong><code class="attributeName">domain</code></strong></td><td>
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The logical cluster domain that this Interceptor accepts.
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Two different type of values are possible:<br>
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1. Regular string values like "staging-domain" or "tomcat-cluster" will be converted into bytes
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using ISO-8859-1 encoding.<br>
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2. byte array in string form, for example {216,123,12,3}<br>
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</td></tr><tr><td><code class="attributeName">logInterval</code></td><td>
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This value indicates the interval for logging for messages from different domains.
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The default is 100, which means that to log per 100 messages.
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</td></tr></table>
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</div></div>
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<div class="subsection"><h4 id="org.apache.catalina.tribes.group.interceptors.FragmentationInterceptor_Attributes">org.apache.catalina.tribes.group.interceptors.FragmentationInterceptor Attributes</h4><div class="text">
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<table class="defaultTable"><tr><th style="width: 15%;">
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Attribute
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</th><th style="width: 85%;">
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Description
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</th></tr><tr><td><code class="attributeName">expire</code></td><td>
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How long do we keep the fragments in memory and wait for the rest to arrive.
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The default is 60000 ms.
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</td></tr><tr><td><code class="attributeName">maxSize</code></td><td>
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The maximum message size in bytes. If the message size exceeds this value, this interceptor fragments the message and sends them.
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If it is less than this value, this interceptor does not fragment the message and sent in as one message. The default is 1024*100.
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</td></tr></table>
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</div></div>
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<div class="subsection"><h4 id="org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor_Attributes">org.apache.catalina.tribes.group.interceptors.MessageDispatch15Interceptor Attributes</h4><div class="text">
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<table class="defaultTable"><tr><th style="width: 15%;">
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Attribute
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</th><th style="width: 85%;">
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Description
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</th></tr><tr><td><strong><code class="attributeName">className</code></strong></td><td>
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Required, This dispatcher uses JDK 1.5 java.util.concurrent package
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</td></tr><tr><td><code class="attributeName">optionFlag</code></td><td>
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The default and hard coded value is <code>8 (org.apache.catalina.tribes.Channel.SEND_OPTIONS_ASYNCHRONOUS)</code>.
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The dispatcher will trigger on this value only, as it is predefined by Tribes.
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The other attributes are inherited from its base class <code>org.apache.catalina.tribes.group.interceptors.MessageDispatchInterceptor</code>.
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</td></tr><tr><td><code class="attributeName">maxThreads</code></td><td>
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The maximum number of threads in this pool, default is 10.
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</td></tr><tr><td><code class="attributeName">maxSpareThreads</code></td><td>
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The number of threads to keep in the pool, default is 2.
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</td></tr><tr><td><code class="attributeName">keepAliveTime</code></td><td>
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Maximum number of milliseconds of until Idle thread terminates. Default value is 5000(5 seconds).
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</td></tr></table>
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</div></div>
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<div class="subsection"><h4 id="org.apache.catalina.tribes.group.interceptors.MessageDispatchInterceptor_Attributes">org.apache.catalina.tribes.group.interceptors.MessageDispatchInterceptor Attributes</h4><div class="text">
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<table class="defaultTable"><tr><th style="width: 15%;">
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Attribute
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</th><th style="width: 85%;">
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Description
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</th></tr><tr><td><strong><code class="attributeName">className</code></strong></td><td>
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Required, Same implementation as <code>MessageDispatch15Interceptor</code>, but with JDK 1.4 compliance.
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</td></tr><tr><td><code class="attributeName">optionFlag</code></td><td>
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The default and hard coded value is <code>8 (org.apache.catalina.tribes.Channel.SEND_OPTIONS_ASYNCHRONOUS)</code>.
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The dispatcher will trigger on this value only, as it is predefined by Tribes.
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</td></tr><tr><td><code class="attributeName">alwaysSend</code></td><td>
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What behavior should be executed when the dispatch queue is full. If <code>true</code> (default), then the message is
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is sent synchronously, if <code>false</code> an error is thrown.
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</td></tr><tr><td><code class="attributeName">maxQueueSize</code></td><td>
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Size in bytes of the dispatch queue, the default value is <code> 1024*1024*64 (64MB)</code> sets the maximum queue size for the dispatch queue
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if the queue fills up, one can trigger the behavior, if <code>alwaysSend</code> is set to true, the message will be sent synchronously
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if the flag is false, an error is thrown
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</td></tr></table>
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</div></div>
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<div class="subsection"><h4 id="org.apache.catalina.tribes.group.interceptors.TcpFailureDetector_Attributes">org.apache.catalina.tribes.group.interceptors.TcpFailureDetector Attributes</h4><div class="text">
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<table class="defaultTable"><tr><th style="width: 15%;">
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Attribute
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</th><th style="width: 85%;">
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Description
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</th></tr><tr><td><code class="attributeName">connectTimeout</code></td><td>
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Specifies the timeout, in milliseconds, to use when attempting a TCP connection
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to the suspect node. Default is 1000.
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</td></tr><tr><td><code class="attributeName">performSendTest</code></td><td>
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If true is set, send a test message to the suspect node. Default is true.
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</td></tr><tr><td><code class="attributeName">performReadTest</code></td><td>
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If true is set, read the response of the test message that sent. Default is false.
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<strong>Note: </strong>if <code>performSendTest</code> is false, this attribute will have no effect.
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</td></tr><tr><td><code class="attributeName">readTestTimeout</code></td><td>
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Specifies the timeout, in milliseconds, to use when performing a read test
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to the suspicious node. Default is 5000.
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</td></tr><tr><td><code class="attributeName">removeSuspectsTimeout</code></td><td>
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The maximum time(in seconds) for remove from removeSuspects. Member of
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removeSuspects will be automatically removed after removeSuspectsTimeout.
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If a negative value specified, the removeSuspects members never be
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removed until disappeared really. If the attribute is not provided,
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a default of 300 seconds (5 minutes) is used.
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</td></tr></table>
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</div></div>
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<div class="subsection"><h4 id="org.apache.catalina.tribes.group.interceptors.TcpPingInterceptor_Attributes">org.apache.catalina.tribes.group.interceptors.TcpPingInterceptor Attributes</h4><div class="text">
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<table class="defaultTable"><tr><th style="width: 15%;">
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Attribute
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</th><th style="width: 85%;">
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Description
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</th></tr><tr><td><code class="attributeName">interval</code></td><td>
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If useThread == true, defines the interval of sending a ping message.
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default is 1000 ms.
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</td></tr><tr><td><code class="attributeName">useThread</code></td><td>
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Flag of whether to start a thread for sending a ping message.
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If set to true, this interceptor will start a local thread for sending a ping message.
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if set to false, channel heartbeat will send a ping message.
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default is false.
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</td></tr></table>
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</div></div>
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<div class="subsection"><h4 id="org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor_Attributes">org.apache.catalina.tribes.group.interceptors.ThroughputInterceptor Attributes</h4><div class="text">
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<table class="defaultTable"><tr><th style="width: 15%;">
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Attribute
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</th><th style="width: 85%;">
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Description
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</th></tr><tr><td><code class="attributeName">interval</code></td><td>
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Defines the interval in number of messages when we are to report the throughput statistics.
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The report is logged to the <code>org.apache.juli.logging.LogFactory.getLog(ThroughputInterceptor.class)</code>
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logger under the <code>INFO</code> level.
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Default value is to report every <code>10000</code> messages.
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</td></tr></table>
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</div></div>
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</div><h3 id="Nested_Components">Nested Components</h3><div class="text">
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<div class="subsection"><h4 id="StaticMember_Attributes">StaticMember Attributes</h4><div class="text">
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<p><b>LocalMember:</b> <br>
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Static member that is the local member of the static cluster group.
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</p>
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<table class="defaultTable"><tr><th style="width: 15%;">
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Attribute
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</th><th style="width: 85%;">
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Description
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</th></tr><tr><td><strong><code class="attributeName">className</code></strong></td><td>
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Only one implementation available:<code>org.apache.catalina.tribes.membership.StaticMember</code>
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</td></tr><tr><td><code class="attributeName">port</code></td><td>
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There is no need to set.
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The value of this attribute inherits from the cluster receiver setting.
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</td></tr><tr><td><code class="attributeName">securePort</code></td><td>
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There is no need to set.
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The value of this attribute inherits from the cluster receiver setting.
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</td></tr><tr><td><code class="attributeName">host</code></td><td>
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There is no need to set.
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The value of this attribute inherits from the cluster receiver setting.
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</td></tr><tr><td><code class="attributeName">domain</code></td><td>
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The logical cluster domain for that this static member listens for cluster messages.
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Two different type of values are possible:<br>
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1. Regular string values like "staging-domain" or "tomcat-cluster" will be converted into bytes
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using ISO-8859-1 encoding.
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2. byte array in string form, for example {216,123,12,3}<br>
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</td></tr><tr><td><strong><code class="attributeName">uniqueId</code></strong></td><td>
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A universally uniqueId for this static member.
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The values must be 16 bytes in the following form:<br>
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1. byte array in string form, for example {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}<br>
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</td></tr></table>
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<p><b>Member:</b> <br>
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Static member that add to the static cluster group.
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</p>
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<table class="defaultTable"><tr><th style="width: 15%;">
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Attribute
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</th><th style="width: 85%;">
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Description
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</th></tr><tr><td><strong><code class="attributeName">className</code></strong></td><td>
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Only one implementation available:<code>org.apache.catalina.tribes.membership.StaticMember</code>
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</td></tr><tr><td><strong><code class="attributeName">port</code></strong></td><td>
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The port that this static member listens to for cluster messages
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</td></tr><tr><td><code class="attributeName">securePort</code></td><td>
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The secure port this static member listens to for encrypted cluster messages
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default value is <code>-1</code>, this value means the member is not listening on a secure port
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</td></tr><tr><td><strong><code class="attributeName">host</code></strong></td><td>
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The host (or network interface) that this static member listens for cluster messages.
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Three different type of values are possible:<br>
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1. IP address in the form of "216.123.1.23"<br>
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2. Hostnames like "tomcat01.mydomain.com" or "tomcat01" as long as they resolve correctly<br>
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3. byte array in string form, for example {216,123,12,3}<br>
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</td></tr><tr><td><code class="attributeName">domain</code></td><td>
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The logical cluster domain for that this static member listens for cluster messages.
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Two different type of values are possible:<br>
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1. Regular string values like "staging-domain" or "tomcat-cluster" will be converted into bytes
|
|
using ISO-8859-1 encoding.<br>
|
|
2. byte array in string form, for example {216,123,12,3}<br>
|
|
</td></tr><tr><td><strong><code class="attributeName">uniqueId</code></strong></td><td>
|
|
A universally uniqueId for this static member.
|
|
The values must be 16 bytes in the following form:<br>
|
|
1. byte array in string form, for example {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}<br>
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