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From rj...@apache.org
Subject svn commit: r1417624 [7/38] - in /tomcat/site/trunk/docs/tomcat-8.0-doc: ./ api/ appdev/ appdev/sample/ appdev/sample/docs/ appdev/sample/src/ appdev/sample/src/mypackage/ appdev/sample/web/ appdev/sample/web/WEB-INF/ appdev/sample/web/images/ architec...
Date Wed, 05 Dec 2012 20:21:01 GMT
Added: tomcat/site/trunk/docs/tomcat-8.0-doc/config/ajp.html
URL: http://svn.apache.org/viewvc/tomcat/site/trunk/docs/tomcat-8.0-doc/config/ajp.html?rev=1417624&view=auto
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--- tomcat/site/trunk/docs/tomcat-8.0-doc/config/ajp.html (added)
+++ tomcat/site/trunk/docs/tomcat-8.0-doc/config/ajp.html Wed Dec  5 20:20:35 2012
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+<html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>Apache Tomcat 8 Configuration Reference (8.0.0-dev) - The AJP Connector</title><meta name="author" content="Remy Maucherat"><meta name="author" content="Yoav Shapira"><meta name="author" content="Andrew R. Jaquith"><style type="text/css" media="print">
+            .noPrint {display: none;}
+            td#mainBody {width: 100%;}
+        </style><style type="text/css">
+            code {background-color:rgb(224,255,255);padding:0 0.1em;}
+            code.attributeName, code.propertyName {background-color:transparent;}
+        </style><style type="text/css">
+            .wrapped-source code { display: block; background-color: transparent; }
+            .wrapped-source div { margin: 0 0 0 1.25em; }
+            .wrapped-source p { margin: 0 0 0 1.25em; text-indent: -1.25em; }
+        </style><style type="text/css">
+            p.notice {
+                border: 1px solid rgb(255, 0, 0);
+                background-color: rgb(238, 238, 238);
+                color: rgb(0, 51, 102);
+                padding: 0.5em;
+                margin: 1em 2em 1em 1em;
+            }
+        </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="
+    The Apache Tomcat Servlet/JSP Container
+  " border="0"></a></td><td><h1><font face="arial,helvetica,sanserif">Apache Tomcat 8</font></h1><font face="arial,helvetica,sanserif">Version 8.0.0-dev, Dec 5 2012</font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img src="../images/asf-logo.gif" align="right" alt="Apache Logo" border="0"></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">Executo
 r</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="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/M
 embership</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>Other</strong></p><ul><li><a href="filter.html">Filter</a></li><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 AJP Connector</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>
+<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_Implementations">Standard Implementations</a></li><li><a href="#Java_TCP_socket_attributes">Java TCP socket attributes</a></li><li><a href="#NIO_specific_configuration">NIO specific configuration</a></li><li><a href="#APR/native_specific_configuration">APR/native specific configuration</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="#Proxy_Support">Proxy Support</a></li><li><a href="#Connector_Comparison">Connector Comparison</a></li></ol></li></ul>
+</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>
+
+  <p>The <strong>AJP Connector</strong> element represents a
+  <strong>Connector</strong> component that communicates with a web
+  connector via the <code>AJP</code> protocol.  This is used for cases
+  where you wish to invisibly integrate Tomcat into an existing (or new)
+  Apache installation, and you want Apache to handle the static content
+  contained in the web application, and/or utilize Apache's SSL
+  processing.</p>
+
+  <p>This connector supports load balancing when used in conjunction with
+  the <code>jvmRoute</code> attribute of the
+  <a href="engine.html">Engine</a>.</p>
+
+  <p>The native connectors supported with this Tomcat release are:
+    <ul>
+      <li>JK 1.2.x with any of the supported servers. See
+      <a href="http://tomcat.apache.org/connectors-doc/">the JK docs</a>
+      for details.</li>
+      <li>mod_proxy on Apache httpd 2.x (included by default in Apache HTTP
+      Server 2.2), with AJP enabled: see
+      <a href="http://httpd.apache.org/docs/2.2/mod/mod_proxy_ajp.html">the
+      httpd docs</a> for details.</li>
+    </ul>
+  </p>
+
+  <p><b>Other native connectors supporting AJP may work, but are no longer
+  supported.</b></p>
+
+</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>
+
+  <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>
+
+  <p>All implementations of <strong>Connector</strong>
+  support the following attributes:</p>
+
+  <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">allowTrace</code></td><td align="left" valign="center">
+      <p>A boolean value which can be used to enable or disable the TRACE
+      HTTP method. If not specified, this attribute is set to false.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">asyncTimeout</code></td><td align="left" valign="center">
+      <p>The default timeout for asynchronous requests in milliseconds. If not
+      specified, this attribute is set to 10000 (10 seconds).</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">enableLookups</code></td><td align="left" valign="center">
+      <p>Set to <code>true</code> if you want calls to
+      <code>request.getRemoteHost()</code> to perform DNS lookups in
+      order to return the actual host name of the remote client.  Set
+      to <code>false</code> to skip the DNS lookup and return the IP
+      address in String form instead (thereby improving performance).
+      By default, DNS lookups are disabled.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxHeaderCount</code></td><td align="left" valign="center">
+      <p>The maximum number of headers in a request that are allowed by the
+      container. A request that contains more headers than the specified limit
+      will be rejected. A value of less than 0 means no limit.
+      If not specified, a default of 100 is used.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxParameterCount</code></td><td align="left" valign="center">
+      <p>The maximum number of parameter and value pairs (GET plus POST) which
+      will be automatically parsed by the container. Parameter and value pairs
+      beyond this limit will be ignored. A value of less than 0 means no limit.
+      If not specified, a default of 10000 is used. Note that
+      <code>FailedRequestFilter</code> <a href="filter.html">filter</a> can be
+      used to reject requests that hit the limit.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxPostSize</code></td><td align="left" valign="center">
+      <p>The maximum size in bytes of the POST which will be handled by
+      the container FORM URL parameter parsing. The limit can be disabled by
+      setting this attribute to a value less than or equal to 0.
+      If not specified, this attribute is set to 2097152 (2 megabytes).</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxSavePostSize</code></td><td align="left" valign="center">
+      <p>The maximum size in bytes of the POST which will be saved/buffered by
+      the container during FORM or CLIENT-CERT authentication. For both types
+      of authentication, the POST will be saved/buffered before the user is
+      authenticated. For CLIENT-CERT authentication, the POST is buffered for
+      the duration of the SSL handshake and the buffer emptied when the request
+      is processed. For FORM authentication the POST is saved whilst the user
+      is re-directed to the login form and is retained until the user
+      successfully authenticates or the session associated with the
+      authentication request expires. The limit can be disabled by setting this
+      attribute to -1. Setting the attribute to zero will disable the saving of
+      POST data during authentication. If not specified, this attribute is set
+      to 4096 (4 kilobytes).</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">parseBodyMethods</code></td><td align="left" valign="center">
+      <p>A comma-separated list of HTTP methods for which request
+      bodies will be parsed for request parameters identically
+      to POST. This is useful in RESTful applications that want to
+      support POST-style semantics for PUT requests.
+      Note that any setting other than <code>POST</code> causes Tomcat
+      to behave in a way that goes against the intent of the servlet
+      specification.
+      The HTTP method TRACE is specifically forbidden here in accordance
+      with the HTTP specification.
+      The default is <code>POST</code></p>
+    </td></tr><tr><td align="left" valign="center"><strong><code class="attributeName">port</code></strong></td><td align="left" valign="center">
+      <p>The TCP port number on which this <strong>Connector</strong>
+      will create a server socket and await incoming connections.  Your
+      operating system will allow only one server application to listen
+      to a particular port number on a particular IP address. If the special
+      value of 0 (zero) is used, then Tomcat will select a free port at random
+      to use for this connector. This is typically only useful in embedded and
+      testing applications.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">protocol</code></td><td align="left" valign="center">
+      <p>Sets the protocol to handle incoming traffic. To configure an AJP
+        connector this must be specified. If no value for protocol is provided,
+        an <a href="http.html">HTTP connector</a> rather than an AJP connector
+        will be configured.<br>
+        The standard protocol value for an AJP connector is <code>AJP/1.3</code>
+        which uses an auto-switching mechanism to select either a Java based
+        connector or an APR/native based connector. If the
+        <code>PATH</code> (Windows) or <code>LD_LIBRARY_PATH</code> (on most unix
+        systems) environment variables contain the Tomcat native library, the
+        native/APR connector will be used. If the native library cannot be
+        found, the Java based connector will be used.<br>
+        To use an explicit protocol rather than rely on the auto-switching
+        mechanism described above, the following values may be used:<br>
+        <code>org.apache.coyote.ajp.AjpProtocol</code>
+        - blocking Java connector<br>
+        <code>org.apache.coyote.ajp.AjpNioProtocol</code>
+        - non blocking Java connector.<br>
+        <code>org.apache.coyote.ajp.AjpAprProtocol</code>
+        - the APR/native connector.<br>
+        Custom implementations may also be used.<br>
+        Take a look at our <a href="#Connector Comparison">Connector
+        Comparison</a> chart.
+      </p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">proxyName</code></td><td align="left" valign="center">
+      <p>If this <strong>Connector</strong> is being used in a proxy
+      configuration, configure this attribute to specify the server name
+      to be returned for calls to <code>request.getServerName()</code>.
+      See <a href="#Proxy Support">Proxy Support</a> for more
+      information.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">proxyPort</code></td><td align="left" valign="center">
+      <p>If this <strong>Connector</strong> is being used in a proxy
+      configuration, configure this attribute to specify the server port
+      to be returned for calls to <code>request.getServerPort()</code>.
+      See <a href="#Proxy Support">Proxy Support</a> for more
+      information.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">redirectPort</code></td><td align="left" valign="center">
+      <p>If this <strong>Connector</strong> is supporting non-SSL
+      requests, and a request is received for which a matching
+      <code>&lt;security-constraint&gt;</code> requires SSL transport,
+      Catalina will automatically redirect the request to the port
+      number specified here.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">scheme</code></td><td align="left" valign="center">
+      <p>Set this attribute to the name of the protocol you wish to have
+      returned by calls to <code>request.getScheme()</code>.  For
+      example, you would set this attribute to "<code>https</code>"
+      for an SSL Connector.  The default value is "<code>http</code>".
+      </p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">secure</code></td><td align="left" valign="center">
+      <p>Set this attribute to <code>true</code> if you wish to have
+      calls to <code>request.isSecure()</code> to return <code>true</code>
+      for requests received by this Connector. You would want this on an
+      SSL Connector or a non SSL connector that is receiving data from a
+      SSL accelerator, like a crypto card, a SSL appliance or even a webserver.
+      The default value is <code>false</code>.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">URIEncoding</code></td><td align="left" valign="center">
+      <p>This specifies the character encoding used to decode the URI bytes,
+      after %xx decoding the URL. If not specified, ISO-8859-1 will be used.
+      </p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">useBodyEncodingForURI</code></td><td align="left" valign="center">
+      <p>This specifies if the encoding specified in contentType should be used
+      for URI query parameters, instead of using the URIEncoding. This
+      setting is present for compatibility with Tomcat 4.1.x, where the
+      encoding specified in the contentType, or explicitly set using
+      Request.setCharacterEncoding method was also used for the parameters from
+      the URL. The default value is <code>false</code>.
+      </p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">useIPVHosts</code></td><td align="left" valign="center">
+      <p>Set this attribute to <code>true</code> to cause Tomcat to use
+      the IP address passed by the native web server to determine the Host
+      to send the request to.  The default value is <code>false</code>.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">xpoweredBy</code></td><td align="left" valign="center">
+      <p>Set this attribute to <code>true</code> to cause Tomcat to advertise
+      support for the Servlet specification using the header recommended in the
+      specification.  The default value is <code>false</code>.</p>
+    </td></tr></table>
+
+  </blockquote></td></tr></table>
+
+  <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Standard Implementations"><!--()--></a><a name="Standard_Implementations"><strong>Standard Implementations</strong></a></font></td></tr><tr><td><blockquote>
+
+  <p>To use AJP, you must specify the protocol attribute (see above).</p>
+
+  <p>The standard AJP connectors (BIO, NIO and APR/native) all support the
+  following attributes in addition to the common Connector attributes listed
+  above.</p>
+
+  <p><strong><font color="red">WARNING</font></strong>: The NIO connector for
+  AJP is experimental.</p>
+
+  <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">acceptCount</code></td><td align="left" valign="center">
+      <p>The maximum queue length for incoming connection requests when
+      all possible request processing threads are in use.  Any requests
+      received when the queue is full will be refused.  The default
+      value is 100.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">acceptorThreadCount</code></td><td align="left" valign="center">
+      <p>The number of threads to be used to accept connections. Increase this
+      value on a multi CPU machine, although you would never really need more
+      than <code>2</code>. Also, with a lot of non keep alive connections, you
+      might want to increase this value as well. Default value is
+      <code>1</code>.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">acceptorThreadPriority</code></td><td align="left" valign="center">
+      <p>The priority of the acceptor threads. The threads used to accept
+      new connections. The default value is <code>5</code> (the value of the
+      <code>java.lang.Thread.NORM_PRIORITY</code> constant). See the JavaDoc
+      for the <code>java.lang.Thread</code> class for more details on what
+      this priority means.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">address</code></td><td align="left" valign="center">
+      <p>For servers with more than one IP address, this attribute
+      specifies which address will be used for listening on the specified
+      port.  By default, this port will be used on all IP addresses
+      associated with the server. A value of <code>127.0.0.1</code>
+      indicates that the Connector will only listen on the loopback
+      interface.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">bindOnInit</code></td><td align="left" valign="center">
+      <p>Controls when the socket used by the connector is bound. By default it
+      is bound when the connector is initiated and unbound when the connector is
+      destroyed. If set to <code>false</code>, the socket will be bound when the
+      connector is started and unbound when it is stopped.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">clientCertProvider</code></td><td align="left" valign="center">
+      <p>When client certificate information is presented in a form other than
+      instances of <code>java.security.cert.X509Certificate</code> it needs to
+      be converted before it can be used and this property controls which JSSE
+      provider is used to perform the conversion. For example it is used with
+      the AJP connectors, the <a href="http.html">HTTP APR connector</a> and
+      with the <a href="valve.html#SSL_Authenticator_Valve">
+      org.apache.catalina.valves.SSLValve</a>.If not specified, the default
+      provider will be used.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">connectionLinger</code></td><td align="left" valign="center">
+      <p>The number of seconds during which the sockets used by this
+      <strong>Connector</strong> will linger when they are closed.
+      If not specified, the JVM default will be used.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">connectionTimeout</code></td><td align="left" valign="center">
+      <p>The number of milliseconds this <strong>Connector</strong> will wait,
+      after accepting a connection, for the request URI line to be
+      presented.  The default value for AJP protocol connectors
+      is <code>-1</code> (i.e. infinite).</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">executor</code></td><td align="left" valign="center">
+      <p>A reference to the name in an <a href="executor.html">Executor</a>
+      element. If this attribute is set, and the named executor exists, the
+      connector will use the executor, and all the other thread attributes will
+      be ignored. Note that if a shared executor is not specified for a
+      connector then the connector will use a private, internal executor to
+      provide the thread pool.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">keepAliveTimeout</code></td><td align="left" valign="center">
+      <p>The number of milliseconds this <strong>Connector</strong> will wait for
+       another AJP request before closing the connection.
+       The default value is to use the value that has been set for the
+       connectionTimeout attribute.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxConnections</code></td><td align="left" valign="center">
+      <p>The maximum number of connections that the server will accept and
+      process at any given time. When this number has been reached, the server
+      will not accept any more connections until the number of connections
+      falls below this value. The operating system may still accept
+      connections based on the <code>acceptCount</code> setting. Default value
+      varies by connector type. For BIO the default is the value of
+      <strong>maxThreads</strong> unless an <a href="executor.html">Executor</a>
+      is used in which case the default will be the value of maxThreads from the
+      executor. For NIO the default is <code>10000</code>.
+      For APR/native, the default is <code>8192</code>.</p>
+      <p>Note that for APR/native on Windows, the configured value will be
+      reduced to the highest multiple of 1024 that is less than or equal to
+      maxConnections. This is done for performance reasons.<br>
+      If set to a value of -1, the maxConnections feature is disabled
+      and connections are not counted.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">maxThreads</code></td><td align="left" valign="center">
+      <p>The maximum number of request processing threads to be created
+      by this <strong>Connector</strong>, which therefore determines the
+      maximum number of simultaneous requests that can be handled.  If
+      not specified, this attribute is set to 200. If an executor is associated
+      with this connector, this attribute is ignored as the connector will
+      execute tasks using the executor rather than an internal thread pool.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">minSpareThreads</code></td><td align="left" valign="center">
+      <p>The minimum number of threads always kept running. If not specified,
+      the default of <code>10</code> is used.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">packetSize</code></td><td align="left" valign="center">
+      <p>This attribute sets the maximum AJP packet size in Bytes. The maximum
+      value is 65536. It should be the same as the <code>max_packet_size</code>
+      directive configured for mod_jk. Normally it is not necessary to change
+      the maximum packet size. Problems with the default value have been
+      reported when sending certificates or certificate chains. The default
+      value is 8192. If set to less than 8192 then the setting will ignored and
+      the default value of 8192 used.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">processorCache</code></td><td align="left" valign="center">
+      <p>The protocol handler caches Processor objects to speed up performance.
+      This setting dictates how many of these objects get cached.
+      <code>-1</code> means unlimited, default is <code>200</code>. If not using
+      Servlet 3.0 asynchronous processing, a good default is to use the same as
+      the maxThreads setting. If using Servlet 3.0 asynchronous processing, a
+      good default is to use the larger of maxThreads and the maximum number of
+      expected concurrent requests (synchronous and asynchronous).</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">requiredSecret</code></td><td align="left" valign="center">
+      <p>Only requests from workers with this secret keyword will be accepted.
+      </p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">tcpNoDelay</code></td><td align="left" valign="center">
+      <p>If set to <code>true</code>, the TCP_NO_DELAY option will be
+      set on the server socket, which improves performance under most
+      circumstances.  This is set to <code>true</code> by default.</p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">threadPriority</code></td><td align="left" valign="center">
+      <p>The priority of the request processing threads within the JVM.
+      The default value is <code>5</code> (the value of the
+      <code>java.lang.Thread.NORM_PRIORITY</code> constant). See the JavaDoc
+      for the <code>java.lang.Thread</code> class for more details on what
+      this priority means.
+      </p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">tomcatAuthentication</code></td><td align="left" valign="center">
+      <p>If set to <code>true</code>, the authentication will be done in Tomcat.
+      Otherwise, the authenticated principal will be propagated from the native
+      webserver and used for authorization in Tomcat.
+      The default value is <code>true</code>.</p>
+    </td></tr></table>
+
+  </blockquote></td></tr></table>
+
+  <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Java TCP socket attributes"><!--()--></a><a name="Java_TCP_socket_attributes"><strong>Java TCP socket attributes</strong></a></font></td></tr><tr><td><blockquote>
+
+    <p>The BIO and NIO implementation support the following Java TCP socket
+    attributes in addition to the common Connector and HTTP attributes listed
+    above.</p>
+
+    <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">socket.rxBufSize</code></td><td align="left" valign="center">
+        <p>(int)The socket receive buffer (SO_RCVBUF) size in bytes. JVM default
+        used if not set.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.txBufSize</code></td><td align="left" valign="center">
+        <p>(int)The socket send buffer (SO_SNDBUF) size in bytes. JVM default
+        used if not set.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.tcpNoDelay</code></td><td align="left" valign="center">
+        <p>(bool)This is equivalent to standard attribute
+        <strong>tcpNoDelay</strong>.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.soKeepAlive</code></td><td align="left" valign="center">
+        <p>(bool)Boolean value for the socket's keep alive setting
+        (SO_KEEPALIVE). JVM default used if not set.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.ooBInline</code></td><td align="left" valign="center">
+        <p>(bool)Boolean value for the socket OOBINLINE setting. JVM default
+        used if not set.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.soReuseAddress</code></td><td align="left" valign="center">
+        <p>(bool)Boolean value for the sockets reuse address option
+        (SO_REUSEADDR). JVM default used if not set.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.soLingerOn</code></td><td align="left" valign="center">
+        <p>(bool)Boolean value for the sockets so linger option (SO_LINGER).
+        A value for the standard attribute <strong>connectionLinger</strong>
+        that is &gt;=0 is equivalent to setting this to <code>true</code>.
+        A value for the standard attribute <strong>connectionLinger</strong>
+        that is &lt;0 is equivalent to setting this to <code>false</code>.
+        Both this attribute and <code>soLingerTime</code> must be set else the
+        JVM defaults will be used for both.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.soLingerTime</code></td><td align="left" valign="center">
+        <p>(int)Value in seconds for the sockets so linger option (SO_LINGER).
+        This is equivalent to standard attribute
+        <strong>connectionLinger</strong>.
+        Both this attribute and <code>soLingerOn</code> must be set else the
+        JVM defaults will be used for both.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.soTimeout</code></td><td align="left" valign="center">
+        <p>This is equivalent to standard attribute
+        <strong>connectionTimeout</strong>.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.performanceConnectionTime</code></td><td align="left" valign="center">
+        <p>(int)The first value for the performance settings. See
+        <a href="http://docs.oracle.com/javase/6/docs/api/java/net/Socket.html#setPerformancePreferences(int,%20int,%20int)">Socket Performance Options</a>
+        All three performance attributes must be set else the JVM defaults will
+        be used for all three.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.performanceLatency</code></td><td align="left" valign="center">
+        <p>(int)The second value for the performance settings. See
+        <a href="http://docs.oracle.com/javase/6/docs/api/java/net/Socket.html#setPerformancePreferences(int,%20int,%20int)">Socket Performance Options</a>
+        All three performance attributes must be set else the JVM defaults will
+        be used for all three.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.performanceBandwidth</code></td><td align="left" valign="center">
+        <p>(int)The third value for the performance settings. See
+        <a href="http://docs.oracle.com/javase/6/docs/api/java/net/Socket.html#setPerformancePreferences(int,%20int,%20int)">Socket Performance Options</a>
+        All three performance attributes must be set else the JVM defaults will
+        be used for all three.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.unlockTimeout</code></td><td align="left" valign="center">
+        <p>(int) The timeout for a socket unlock. When a connector is stopped, it will try to release the acceptor thread by opening a connector to itself.
+           The default value is <code>250</code> and the value is in milliseconds</p>
+      </td></tr></table>
+  </blockquote></td></tr></table>
+
+  <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="NIO specific configuration"><!--()--></a><a name="NIO_specific_configuration"><strong>NIO specific configuration</strong></a></font></td></tr><tr><td><blockquote>
+
+    <p>The following attributes are specific to the NIO connector.</p>
+
+    <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">socket.directBuffer</code></td><td align="left" valign="center">
+        <p>(bool)Boolean value, whether to use direct ByteBuffers or java mapped
+        ByteBuffers. Default is <code>false</code>.<br>
+        When you are using direct buffers, make sure you allocate the
+        appropriate amount of memory for the direct memory space. On Sun's JDK
+        that would be something like <code>-XX:MaxDirectMemorySize=256m</code>.
+        </p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.appReadBufSize</code></td><td align="left" valign="center">
+        <p>(int)Each connection that is opened up in Tomcat get associated with
+        a read ByteBuffer. This attribute controls the size of this buffer. By
+        default this read buffer is sized at <code>8192</code> bytes. For lower
+        concurrency, you can increase this to buffer more data. For an extreme
+        amount of keep alive connections, decrease this number or increase your
+        heap size.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.appWriteBufSize</code></td><td align="left" valign="center">
+        <p>(int)Each connection that is opened up in Tomcat get associated with
+        a write ByteBuffer. This attribute controls the size of this buffer. By
+        default this write buffer is sized at <code>8192</code> bytes. For low
+        concurrency you can increase this to buffer more response data. For an
+        extreme amount of keep alive connections, decrease this number or
+        increase your heap size.<br>
+        The default value here is pretty low, you should up it if you are not
+        dealing with tens of thousands concurrent connections.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.bufferPool</code></td><td align="left" valign="center">
+        <p>(int)The NIO connector uses a class called NioChannel that holds
+        elements linked to a socket. To reduce garbage collection, the NIO
+        connector caches these channel objects. This value specifies the size of
+        this cache. The default value is <code>500</code>, and represents that
+        the cache will hold 500 NioChannel objects. Other values are
+        <code>-1</code> for unlimited cache and <code>0</code> for no cache.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.bufferPoolSize</code></td><td align="left" valign="center">
+        <p>(int)The NioChannel pool can also be size based, not used object
+        based. The size is calculated as follows:<br>
+        NioChannel
+        <code>buffer size = read buffer size + write buffer size</code><br>
+        SecureNioChannel <code>buffer size = application read buffer size +
+        application write buffer size + network read buffer size +
+        network write buffer size</code><br>
+        The value is in bytes, the default value is <code>1024*1024*100</code>
+        (100MB).</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.processorCache</code></td><td align="left" valign="center">
+        <p>(int)Tomcat will cache SocketProcessor objects to reduce garbage
+        collection. The integer value specifies how many objects to keep in the
+        cache at most. The default is <code>500</code>. Other values are
+        <code>-1</code> for unlimited cache and <code>0</code> for no cache.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.keyCache</code></td><td align="left" valign="center">
+        <p>(int)Tomcat will cache KeyAttachment objects to reduce garbage
+        collection. The integer value specifies how many objects to keep in the
+        cache at most. The default is <code>500</code>. Other values are
+        <code>-1</code> for unlimited cache and <code>0</code> for no cache.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">socket.eventCache</code></td><td align="left" valign="center">
+        <p>(int)Tomcat will cache PollerEvent objects to reduce garbage
+        collection. The integer value specifies how many objects to keep in the
+        cache at most. The default is <code>500</code>. Other values are
+        <code>-1</code> for unlimited cache and <code>0</code> for no cache.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">selectorPool.maxSelectors</code></td><td align="left" valign="center">
+        <p>(int)The max selectors to be used in the pool, to reduce selector
+        contention. Use this option when the command line
+        <code>org.apache.tomcat.util.net.NioSelectorShared</code> value is set
+        to false. Default value is <code>200</code>.</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">selectorPool.maxSpareSelectors</code></td><td align="left" valign="center">
+        <p>(int)The max spare selectors to be used in the pool, to reduce
+        selector contention. When a selector is returned to the pool, the system
+        can decide to keep it or let it be GC'd. Use this option when the
+        command line <code>org.apache.tomcat.util.net.NioSelectorShared</code>
+        value is set to false. Default value is <code>-1</code> (unlimited).</p>
+      </td></tr><tr><td align="left" valign="center"><code class="attributeName">command-line-options</code></td><td align="left" valign="center">
+        <p>The following command line options are available for the NIO
+        connector:<br>
+        <code>-Dorg.apache.tomcat.util.net.NioSelectorShared=true|false</code>
+        - default is <code>true</code>. Set this value to <code>false</code> if you wish to
+        use a selector for each thread. When you set it to <code>false</code>, you can
+        control the size of the pool of selectors by using the
+        <strong>selectorPool.maxSelectors</strong> attribute.</p>
+      </td></tr></table>
+  </blockquote></td></tr></table>
+
+  <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="APR/native specific configuration"><!--()--></a><a name="APR/native_specific_configuration"><strong>APR/native specific configuration</strong></a></font></td></tr><tr><td><blockquote>
+
+    <p>The APR/native implementation supports the following attributes in
+    addition to the common Connector and AJP attributes listed above.</p>
+
+    <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">pollTime</code></td><td align="left" valign="center">
+        <p>Duration of a poll call in microseconds. Lowering this value will
+        slightly decrease latency of connections being kept alive in some cases
+        , but will use more CPU as more poll calls are being made. The default
+        value is 2000 (2ms).
+        </p>
+    </td></tr><tr><td align="left" valign="center"><code class="attributeName">pollerSize</code></td><td align="left" valign="center">
+      <p>Amount of sockets that the poller responsible for polling kept alive
+      connections can hold at a given time. Extra connections will be closed
+      right away. The default value is 8192, corresponding to 8192 keep-alive
+      connections.</p>
+    </td></tr></table>
+
+  </blockquote></td></tr></table>
+
+</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>
+
+  <p>None at this time.</p>
+
+</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>
+
+  <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Proxy Support"><!--()--></a><a name="Proxy_Support"><strong>Proxy Support</strong></a></font></td></tr><tr><td><blockquote>
+
+  <p>The <code>proxyName</code> and <code>proxyPort</code> attributes can
+  be used when Tomcat is run behind a proxy server.  These attributes
+  modify the values returned to web applications that call the
+  <code>request.getServerName()</code> and <code>request.getServerPort()</code>
+  methods, which are often used to construct absolute URLs for redirects.
+  Without configuring these attributes, the values returned would reflect
+  the server name and port on which the connection from the proxy server
+  was received, rather than the server name and port to whom the client
+  directed the original request.</p>
+
+  <p>For more information, see the
+  <a href="../proxy-howto.html">Proxy Support HOW-TO</a>.</p>
+
+  </blockquote></td></tr></table>
+
+  <table border="0" cellspacing="0" cellpadding="2"><tr><td bgcolor="#828DA6"><font color="#ffffff" face="arial,helvetica.sanserif"><a name="Connector Comparison"><!--()--></a><a name="Connector_Comparison"><strong>Connector Comparison</strong></a></font></td></tr><tr><td><blockquote>
+
+    <p>Below is a small chart that shows how the connectors differentiate.</p>
+    <div align="left"><table cellspacing="4" cellpadding="0" border="0"><tr><td bgcolor="#023264" width="1" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" width="1" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td></tr><tr><td bgcolor="#023264" width="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#ffffff" height="1"><pre>
+                       Java Blocking Connector   Java Nio Blocking Connector   APR/native Connector
+                                 BIO                         NIO                       APR
+    Classname                AjpProtocol               AjpNioProtocol           AjpAprProtocol
+    Tomcat Version           3.x onwards                 7.x onwards              5.5.x onwards
+    Support Polling              NO                          YES                       YES
+    Polling Size                 N/A                   maxConnections             maxConnections
+    Read Request Headers      Blocking                  Sim Blocking                   Blocking
+    Read Request Body         Blocking                  Sim Blocking                   Blocking
+    Write Response            Blocking                  Sim Blocking                   Blocking
+    Wait for next Request     Blocking                  Non Blocking               Non Blocking
+    Max Connections        maxConnections              maxConnections             maxConnections
+
+    </pre></td><td bgcolor="#023264" width="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td></tr><tr><td bgcolor="#023264" width="1" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td><td bgcolor="#023264" width="1" height="1"><img src="../images/void.gif" alt="" width="1" height="1" vspace="0" hspace="0" border="0"></td></tr></table></div>
+
+  </blockquote></td></tr></table>
+
+</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 is not a Q&amp;A section.
+              The Apache Comments System is explained
+              <a href="/tomcat-8.0-doc/comments.html">here</a>.
+              Comments should be pointed towards suggestions on improving the documentation
+              or server, and may be removed again by our moderators if they are either
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+              Questions on how to manage Apache Tomcat should be directed
+              to our <a href="http://tomcat.apache.org/lists.html">mailing lists</a>.</p><script type="text/javascript"><!--//--><![CDATA[//><!--
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+              (function(w, d) {
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+                      (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s);
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+                      d.write('<div id="comments_thread"><strong>Comments are disabled for this page at the moment.</strong><\/div>');
+                  }
+              })(window, document);
+              //--><!]]></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>
+        Copyright &copy; 1999-2012, Apache Software Foundation
+        </em></font></div></td></tr></table></body></html>
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--- tomcat/site/trunk/docs/tomcat-8.0-doc/config/cluster-channel.html (added)
+++ tomcat/site/trunk/docs/tomcat-8.0-doc/config/cluster-channel.html Wed Dec  5 20:20:35 2012
@@ -0,0 +1,103 @@
+<html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>Apache Tomcat 8 Configuration Reference (8.0.0-dev) - The Cluster Channel object</title><meta name="author" content="Filip Hanik"><style type="text/css" media="print">
+            .noPrint {display: none;}
+            td#mainBody {width: 100%;}
+        </style><style type="text/css">
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+        </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="
+    The Apache Tomcat Servlet/JSP Container
+  " border="0"></a></td><td><h1><font face="arial,helvetica,sanserif">Apache Tomcat 8</font></h1><font face="arial,helvetica,sanserif">Version 8.0.0-dev, Dec 5 2012</font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img src="../images/asf-logo.gif" align="right" alt="Apache Logo" border="0"></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">Executo
 r</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="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/M
 embership</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>Other</strong></p><ul><li><a href="filter.html">Filter</a></li><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 Cluster Channel object</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>
+<ul><li><a href="#Introduction">Introduction</a></li><li><a href="#Nested_Components">Nested Components</a></li><li><a href="#Attributes">Attributes</a><ol><li><a href="#Common_Attributes">Common Attributes</a></li></ol></li></ul>
+</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>
+  The cluster channel is the main component of a small framework we've nicknamed Apache Tribes.<br>
+  The channel manages a set of sub components and together they create a group communication framework.<br>
+  This framework is then used internally by the components that need to send messages between different Tomcat instances.
+  <br>
+  A few examples of these components would be the SimpleTcpCluster that does the messaging for the DeltaManager,
+  or the BackupManager that uses a different replication strategy. The ReplicatedContext object does also
+  use the channel object to communicate context attribute changes.
+</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>
+  <p><b><a href="cluster-membership.html">Channel/Membership</a>:</b> <br>
+    The Membership component is responsible for auto discovering new nodes in the cluster
+    and also to provide for notifications for any nodes that have not responded with a heartbeat.
+    The default implementation uses multicast.<br>
+    In the membership component you configure how your nodes, aka. members, are to be discovered and/or
+    divided up.
+    You can always find out more about <a href="../tribes/introduction.html">Apache Tribes</a>
+  </p>
+  <p><b><a href="cluster-sender.html">Channel/Sender</a>:</b> <br>
+    The Sender component manages all outbound connections and data messages that are sent
+    over the network from one node to another.
+    This component allows messages to be sent in parallel.
+    The default implementation uses TCP client sockets, and socket tuning for outgoing messages are
+    configured here.<br>
+    You can always find out more about <a href="../tribes/introduction.html">Apache Tribes</a>
+  </p>
+  <p><b><a href="cluster-sender.html#transport">Channel/Sender/Transport</a>:</b> <br>
+    The Transport component is the bottom IO layer for the sender component.
+    The default implementation uses non-blocking TCP client sockets.<br>
+    You can always find out more about <a href="../tribes/introduction.html">Apache Tribes</a>
+  </p>
+  <p><b><a href="cluster-receiver.html">Channel/Receiver</a>:</b> <br>
+    The receiver component listens for messages from other nodes.
+    Here you will configure the cluster thread pool, as it will dispatch incoming
+    messages to a thread pool for faster processing.
+    The default implementation uses non-blocking TCP server sockets.<br>
+    You can always find out more about <a href="../tribes/introduction.html">Apache Tribes</a>
+  </p>
+  <p><b><a href="cluster-interceptor.html">Channel/Interceptor</a>:</b> <br>
+    The channel will send messages through an interceptor stack. Because of this, you have the ability to
+    customize the way messages are sent and received, and even how membership is handled.<br>
+    You can always find out more about <a href="../tribes/introduction.html">Apache Tribes</a>
+  </p>
+</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>
+
+  <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>
+
+  <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">
+       The default value here is <code>org.apache.catalina.tribes.group.GroupChannel</code> and is
+       currently the only implementation available.
+    </td></tr></table>
+
+
+  </blockquote></td></tr></table>
+
+
+</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 is not a Q&amp;A section.
+              The Apache Comments System is explained
+              <a href="/tomcat-8.0-doc/comments.html">here</a>.
+              Comments should be pointed towards suggestions on improving the documentation
+              or server, and may be removed again by our moderators if they are either
+              implemented or considered invalid/off-topic.
+              Questions on how to manage Apache Tomcat should be directed
+              to our <a href="http://tomcat.apache.org/lists.html">mailing lists</a>.</p><script type="text/javascript"><!--//--><![CDATA[//><!--
+              var comments_shortname = 'tomcat';
+              var comments_identifier = 'http://tomcat.apache.org/tomcat-8.0-doc/config/cluster-channel.html';
+              (function(w, d) {
+                  if (w.location.hostname.toLowerCase() == "tomcat.apache.org") {
+                      d.write('<div id="comments_thread"><\/div>');
+                      var s = d.createElement('script');
+                      s.type = 'text/javascript';
+                      s.async = true;
+                      s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier;
+                      (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s);
+                  }
+                  else {
+                      d.write('<div id="comments_thread"><strong>Comments are disabled for this page at the moment.</strong><\/div>');
+                  }
+              })(window, document);
+              //--><!]]></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>
+        Copyright &copy; 1999-2012, Apache Software Foundation
+        </em></font></div></td></tr></table></body></html>
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+<html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>Apache Tomcat 8 Configuration Reference (8.0.0-dev) - The Cluster Deployer object</title><meta name="author" content="Filip Hanik"><style type="text/css" media="print">
+            .noPrint {display: none;}
+            td#mainBody {width: 100%;}
+        </style><style type="text/css">
+            code {background-color:rgb(224,255,255);padding:0 0.1em;}
+            code.attributeName, code.propertyName {background-color:transparent;}
+        </style><style type="text/css">
+            .wrapped-source code { display: block; background-color: transparent; }
+            .wrapped-source div { margin: 0 0 0 1.25em; }
+            .wrapped-source p { margin: 0 0 0 1.25em; text-indent: -1.25em; }
+        </style><style type="text/css">
+            p.notice {
+                border: 1px solid rgb(255, 0, 0);
+                background-color: rgb(238, 238, 238);
+                color: rgb(0, 51, 102);
+                padding: 0.5em;
+                margin: 1em 2em 1em 1em;
+            }
+        </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="
+    The Apache Tomcat Servlet/JSP Container
+  " border="0"></a></td><td><h1><font face="arial,helvetica,sanserif">Apache Tomcat 8</font></h1><font face="arial,helvetica,sanserif">Version 8.0.0-dev, Dec 5 2012</font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img src="../images/asf-logo.gif" align="right" alt="Apache Logo" border="0"></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">Executo
 r</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="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/M
 embership</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>Other</strong></p><ul><li><a href="filter.html">Filter</a></li><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 Cluster Deployer object</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>
+<ul><li><a href="#Introduction">Introduction</a></li><li><a href="#Attributes">Attributes</a><ol><li><a href="#Common_Attributes">Common Attributes</a></li></ol></li></ul>
+</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>
+  <p>TODO - Complete documentation</p>
+
+
+</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>
+
+  <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>
+
+  <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">
+
+    </td></tr></table>
+
+
+  </blockquote></td></tr></table>
+
+
+</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 is not a Q&amp;A section.
+              The Apache Comments System is explained
+              <a href="/tomcat-8.0-doc/comments.html">here</a>.
+              Comments should be pointed towards suggestions on improving the documentation
+              or server, and may be removed again by our moderators if they are either
+              implemented or considered invalid/off-topic.
+              Questions on how to manage Apache Tomcat should be directed
+              to our <a href="http://tomcat.apache.org/lists.html">mailing lists</a>.</p><script type="text/javascript"><!--//--><![CDATA[//><!--
+              var comments_shortname = 'tomcat';
+              var comments_identifier = 'http://tomcat.apache.org/tomcat-8.0-doc/config/cluster-deployer.html';
+              (function(w, d) {
+                  if (w.location.hostname.toLowerCase() == "tomcat.apache.org") {
+                      d.write('<div id="comments_thread"><\/div>');
+                      var s = d.createElement('script');
+                      s.type = 'text/javascript';
+                      s.async = true;
+                      s.src = 'https://comments.apache.org/show_comments.lua?site=' + comments_shortname + '&page=' + comments_identifier;
+                      (d.getElementsByTagName('head')[0] || d.getElementsByTagName('body')[0]).appendChild(s);
+                  }
+                  else {
+                      d.write('<div id="comments_thread"><strong>Comments are disabled for this page at the moment.</strong><\/div>');
+                  }
+              })(window, document);
+              //--><!]]></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>
+        Copyright &copy; 1999-2012, Apache Software Foundation
+        </em></font></div></td></tr></table></body></html>
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