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From conflue...@apache.org
Subject [CONF] Apache Geronimo v3.0 > Managing Valve
Date Fri, 28 Jan 2011 02:40:00 GMT
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    <h2><a href="https://cwiki.apache.org/confluence/display/GMOxDOC30/Managing+Valve">Managing
Valve</a></h2>
    <h4>Page <b>edited</b> by             <a href="https://cwiki.apache.org/confluence/display/~maojia508">maojia</a>
    </h4>
        <br/>
                         <h4>Changes (16)</h4>
                                 
    
<div id="page-diffs">
                    <table class="diff" cellpadding="0" cellspacing="0">
    
            <tr><td class="diff-snipped" >...<br></td></tr>
            <tr><td class="diff-unchanged" >{excerpt}In Tomcat, a _valve_ is a
Java class that can be inserted into the request processing pipeline.  A valve executes as
part of Tomcat&#39;s servlet container and is independent of the Web application.{excerpt}
Valves run in a chain where the last link in the chain is the Web application itself. Each
valve performs its request processing, calls the next valve in the chain, performs its response
processing, and returns to the valve that called it. See the [Tomcat valve component|http://tomcat.apache.org/tomcat-6.0-doc/config/valve.html|The
Valve Component] for more information on the valves provided in the Tomcat library. <br>
<br></td></tr>
            <tr><td class="diff-changed-lines" >Currently, the valve cannot be
configured <span class="diff-added-words"style="background-color: #dfd;">by</span>
using the <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">Administrative</span>
<span class="diff-added-words"style="background-color: #dfd;">administration</span>
console. Tomcat valves are initially defined in the {{&lt;geronimo_home&gt;/repository/org/apache/geronimo/configs/tomcat6/2.2/tomcat6-2.2.car/META-INF/plan.xml}}
<span class="diff-changed-words">file<span class="diff-deleted-chars"style="color:#999;background-color:#fdd;text-decoration:line-through;">;</span><span
class="diff-added-chars"style="background-color: #dfd;">.</span></span> To
change valves <span class="diff-changed-words">configuration<span class="diff-added-chars"style="background-color:
#dfd;">,</span></span> you must modify {{&lt;Geronimo_home&gt;/var/config/[config.xml]}}.
<br></td></tr>
            <tr><td class="diff-unchanged" > <br></td></tr>
            <tr><td class="diff-changed-lines" >The following sections illustrate
common changes <span class="diff-added-words"style="background-color: #dfd;">that</span>
you <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">may</span>
<span class="diff-added-words"style="background-color: #dfd;">might</span> want
to make to your valve chain. <br></td></tr>
            <tr><td class="diff-unchanged" > <br>{toc:minLevel=2} <br>
<br>h2. Disable the Access Log Valve <br></td></tr>
            <tr><td class="diff-changed-lines" >By default, the initial configuration
<span class="diff-added-words"style="background-color: #dfd;">of the server</span>
contains one valve referenced by the *Tomcat engine*. That valve is the *Access Log Valve*.
This value is used to create log files that record every request used to access the Web container
<span class="diff-added-words"style="background-color: #dfd;">by</span> using
the same format as those created by standard Web servers. These logs can later be analyzed
by the <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">administrative</span>
<span class="diff-added-words"style="background-color: #dfd;">administration</span>
console and other standard log analysis tools to track page hit counts, user session activity,
and so on. The files produced by this valve are rolled over nightly at midnight. Its classname
is *org.apache.catalina.valves.AccessLogValve* and its GBean name is *AccessLogValve*. In
some cases, administrators are not interested in logging information about the requests sent
to the server and want to remove the overhead of the <span class="diff-changed-words"><span
class="diff-added-chars"style="background-color: #dfd;">*</span>Access</span>
Log <span class="diff-changed-words">Valve<span class="diff-added-chars"style="background-color:
#dfd;">*</span>.</span>  To remove the <span class="diff-changed-words"><span
class="diff-added-chars"style="background-color: #dfd;">*</span>Access</span>
Log <span class="diff-changed-words">Valve<span class="diff-added-chars"style="background-color:
#dfd;">*</span></span> from the valve chain, <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">follow</span>
<span class="diff-added-words"style="background-color: #dfd;">use</span> the <span
class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">procedure
below.</span> <span class="diff-added-words"style="background-color: #dfd;">following
procedure:</span> <br></td></tr>
            <tr><td class="diff-unchanged" > <br></td></tr>
            <tr><td class="diff-changed-lines" ># Stop the <span class="diff-changed-words">server<span
class="diff-deleted-chars"style="color:#999;background-color:#fdd;text-decoration:line-through;">;</span><span
class="diff-added-chars"style="background-color: #dfd;">.</span></span> <br></td></tr>
            <tr><td class="diff-changed-lines" ># Backup <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">
</span> <span class="diff-added-words"style="background-color: #dfd;">the</span>
{{&lt;geronimo_home&gt;/var/config/config.xml}} file and then open it in an editor.
<br></td></tr>
            <tr><td class="diff-changed-lines" ># Add the following code right
after <span class="diff-added-words"style="background-color: #dfd;">the</span>
*&lt;module name=&quot;org.apache.geronimo.configs/tomcat6/2.2/car&quot;&gt;*
tag to disable the <span class="diff-changed-words"><span class="diff-added-chars"style="background-color:
#dfd;">*</span>Access</span> Log <span class="diff-changed-words">Valve<span
class="diff-added-chars"style="background-color: #dfd;">*</span>,</span> and
then restart the server after you save the file. <br></td></tr>
            <tr><td class="diff-unchanged" >{code} <br>&lt;module name=&quot;org.apache.geronimo.configs/tomcat6/2.2/car&quot;&gt;
<br></td></tr>
            <tr><td class="diff-snipped" >...<br></td></tr>
            <tr><td class="diff-unchanged" >h2. Add a second Valve  <br>
<br></td></tr>
            <tr><td class="diff-deleted-lines" style="color:#999;background-color:#fdd;text-decoration:line-through;">Let&#39;s
take the Single Sign-on Valve as an example here. The Single Sign-on Valve is used to give
users the ability to sign on to any Web application and then have their identity recognized
by all other Web applications within the same container.  To add the Single Sign-on Valve
to the Access Log Valve in the initial valve chain, follow the procedure below. <br></td></tr>
            <tr><td class="diff-added-lines" style="background-color: #dfd;">This
section takes the Single Sign-on Valve as an example. The Single Sign-on Valve is used to
give users the ability to sign on to any Web application and then have their identity recognized
by all other Web applications within the same container.  To add the Single Sign-on Valve
to the *Access Log Valve* in the initial valve chain, use the following procedure: <br></td></tr>
            <tr><td class="diff-unchanged" > <br></td></tr>
            <tr><td class="diff-deleted-lines" style="color:#999;background-color:#fdd;text-decoration:line-through;">
<br></td></tr>
            <tr><td class="diff-changed-lines" ># Stop the <span class="diff-changed-words">server<span
class="diff-deleted-chars"style="color:#999;background-color:#fdd;text-decoration:line-through;">;</span><span
class="diff-added-chars"style="background-color: #dfd;">.</span></span> <br></td></tr>
            <tr><td class="diff-unchanged" ># Backup  {{&lt;geronimo_home&gt;/var/config/config.xml}}
file and then open it in an editor. <br></td></tr>
            <tr><td class="diff-changed-lines" ># Add the following code right
after <span class="diff-added-words"style="background-color: #dfd;">the</span>
*&lt;module name=&quot;org.apache.geronimo.configs/tomcat6/2.2/car&quot;&gt;*
tag to define the Single Sign-on Valve, and then restart the server after you save the file.
<br></td></tr>
            <tr><td class="diff-unchanged" >{code} <br>&lt;module name=&quot;org.apache.geronimo.configs/tomcat6/2.2/car&quot;&gt;
<br></td></tr>
            <tr><td class="diff-snipped" >...<br></td></tr>
            <tr><td class="diff-unchanged" >    &lt;/gbean&gt; <br>{code}
<br></td></tr>
            <tr><td class="diff-changed-lines" >#* The *j2eeType=* attribute in
the added *&lt;gbean&gt;* tags have been split across several lines for readability.
<span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">
</span> In your file, the attribute must be on a single line. <span class="diff-changed-words">Also<span
class="diff-added-chars"style="background-color: #dfd;">,</span></span> you
can add the other Valves by <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">simply</span>
replacing {{org.apache.catalina.authenticator.SingleSignOn}} in <span class="diff-added-words"style="background-color:
#dfd;">the</span> {{&lt;attribute name=&quot;className&quot;&gt;
&lt;/attribute&gt;}} block. <br></td></tr>
            <tr><td class="diff-unchanged" > <br> <br></td></tr>
            <tr><td class="diff-snipped" >...<br></td></tr>
            <tr><td class="diff-unchanged" >h2. Configure a valve chain <br>
<br></td></tr>
            <tr><td class="diff-changed-lines" >Valves chained to the Tomcat engine
are invoked for requests received by all the virtual hosts. <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">
</span> In some cases, you <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">may</span>
<span class="diff-added-words"style="background-color: #dfd;">might</span> want
to customize the valve chain for a given host. <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">
</span> In this case, use the following <span class="diff-changed-words">procedure<span
class="diff-deleted-chars"style="color:#999;background-color:#fdd;text-decoration:line-through;">.</span><span
class="diff-added-chars"style="background-color: #dfd;">:</span></span> <br></td></tr>
            <tr><td class="diff-unchanged" > <br></td></tr>
            <tr><td class="diff-changed-lines" ># Stop the <span class="diff-changed-words">server<span
class="diff-deleted-chars"style="color:#999;background-color:#fdd;text-decoration:line-through;">;</span><span
class="diff-added-chars"style="background-color: #dfd;">.</span></span> <br></td></tr>
            <tr><td class="diff-unchanged" ># Backup  {{&lt;geronimo_home&gt;/var/config/config.xml}}
file and then open it in an editor. <br></td></tr>
            <tr><td class="diff-changed-lines" ># <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">Update
{{config.xml}} as followed</span> <span class="diff-added-words"style="background-color:
#dfd;">Add the following code</span> right after <span class="diff-added-words"style="background-color:
#dfd;">the</span> *&lt;module name=&quot;org.apache.geronimo.configs/tomcat6/2.2/car&quot;&gt;*
tag to define a valve chain, and then restart the server after you save the <span class="diff-changed-words">file.<span
class="diff-deleted-chars"style="color:#999;background-color:#fdd;text-decoration:line-through;">:</span></span>
<br></td></tr>
            <tr><td class="diff-unchanged" >{code} <br>&lt;module name=&quot;org.apache.geronimo.configs/tomcat6/2.2/car&quot;&gt;
<br></td></tr>
            <tr><td class="diff-snipped" >...<br></td></tr>
            <tr><td class="diff-unchanged" >* _valvex_ is the system unique name
for the last valve GBean in the chain. <br>* _class_ is the class name of a valid [Tomcat
valve|http://tomcat.apache.org/tomcat-6.0-doc/config/valve.html|The Valve Component]. <br></td></tr>
            <tr><td class="diff-changed-lines" >* _parms_ is a white space separated
list of valve <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">parameters
where</span> <span class="diff-added-words"style="background-color: #dfd;">parameters.
In this list,</span> each parameter has the form _key=value_ where _key_ is the keyword
for the parameter and _value_ is the value of the parameter.  See the valve&#39;s documentation
for information <span class="diff-deleted-words"style="color:#999;background-color:#fdd;text-decoration:line-through;">on</span>
<span class="diff-added-words"style="background-color: #dfd;">about</span> supported
parameters, if any. <br></td></tr>
    
            </table>
    </div>                            <h4>Full Content</h4>
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/*]]>*/</style><div class="Scrollbar"><table class='ScrollbarTable'><tr><td
class='ScrollbarPrevIcon'><a href="/confluence/display/GMOxDOC30/Configuring+virtual+host"><img
border='0' align='middle' src='/confluence/images/icons/back_16.gif' width='16' height='16'></a></td><td
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Container</a></td><td width='33%' class='ScrollbarNextName'>&nbsp;</td></tr></table></div>
<p>In Tomcat, a <em>valve</em> is a Java class that can be inserted into
the request processing pipeline.  A valve executes as part of Tomcat's servlet container and
is independent of the Web application. Valves run in a chain where the last link in the chain
is the Web application itself. Each valve performs its request processing, calls the next
valve in the chain, performs its response processing, and returns to the valve that called
it. See the <a href="http://tomcat.apache.org/tomcat-6.0-doc/config/valve.html" title="The
Valve Component" class="external-link" rel="nofollow">Tomcat valve component</a>
for more information on the valves provided in the Tomcat library.</p>

<p>Currently, the valve cannot be configured by using the administration console. Tomcat
valves are initially defined in the <tt>&lt;geronimo_home&gt;/repository/org/apache/geronimo/configs/tomcat6/2.2/tomcat6-2.2.car/META-INF/plan.xml</tt>
file. To change valves configuration, you must modify <tt>&lt;Geronimo_home&gt;/var/config/<a
href="/confluence/display/GMOxDOC30/config.xml" title="config.xml">config.xml</a></tt>.</p>

<p>The following sections illustrate common changes that you might want to make to your
valve chain.</p>

<div>
<ul>
    <li><a href='#ManagingValve-DisabletheAccessLogValve'>Disable the Access Log
Valve</a></li>
    <li><a href='#ManagingValve-AddasecondValve'>Add a second Valve</a></li>
    <li><a href='#ManagingValve-Configureavalvechain'>Configure a valve chain</a></li>
</ul></div>

<h2><a name="ManagingValve-DisabletheAccessLogValve"></a>Disable the Access
Log Valve</h2>
<p>By default, the initial configuration of the server contains one valve referenced
by the <b>Tomcat engine</b>. That valve is the <b>Access Log Valve</b>.
This value is used to create log files that record every request used to access the Web container
by using the same format as those created by standard Web servers. These logs can later be
analyzed by the administration console and other standard log analysis tools to track page
hit counts, user session activity, and so on. The files produced by this valve are rolled
over nightly at midnight. Its classname is <b>org.apache.catalina.valves.AccessLogValve</b>
and its GBean name is <b>AccessLogValve</b>. In some cases, administrators are
not interested in logging information about the requests sent to the server and want to remove
the overhead of the <b>Access Log Valve</b>.  To remove the <b>Access Log
Valve</b> from the valve chain, use the following procedure:</p>

<ol>
	<li>Stop the server.</li>
	<li>Backup the <tt>&lt;geronimo_home&gt;/var/config/config.xml</tt>
file and then open it in an editor.</li>
	<li>Add the following code right after the <b>&lt;module name="org.apache.geronimo.configs/tomcat6/2.2/car"&gt;</b>
tag to disable the <b>Access Log Valve</b>, and then restart the server after
you save the file.
<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<pre class="code-java">
&lt;module name=<span class="code-quote">"org.apache.geronimo.configs/tomcat6/2.2/car"</span>&gt;
...
    &lt;gbean name=<span class="code-quote">"TomcatEngine"</span>&gt;
        &lt;attribute name=<span class="code-quote">"initParams"</span>&gt;
            name=Geronimo
        &lt;/attribute&gt;
        &lt;reference name=<span class="code-quote">"TomcatValveChain"</span>/&gt;
    &lt;/gbean&gt;
    &lt;gbean name=<span class="code-quote">"AccessLogValve"</span> load=<span
class="code-quote">"<span class="code-keyword">false</span>"</span>&gt;&lt;/gbean&gt;
...
</pre>
</div></div></li>
</ol>


<h2><a name="ManagingValve-AddasecondValve"></a>Add a second Valve </h2>

<p>This section takes the Single Sign-on Valve as an example. The Single Sign-on Valve
is used to give users the ability to sign on to any Web application and then have their identity
recognized by all other Web applications within the same container.  To add the Single Sign-on
Valve to the <b>Access Log Valve</b> in the initial valve chain, use the following
procedure:</p>

<ol>
	<li>Stop the server.</li>
	<li>Backup  <tt>&lt;geronimo_home&gt;/var/config/config.xml</tt>
file and then open it in an editor.</li>
	<li>Add the following code right after the <b>&lt;module name="org.apache.geronimo.configs/tomcat6/2.2/car"&gt;</b>
tag to define the Single Sign-on Valve, and then restart the server after you save the file.
<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<pre class="code-java">
&lt;module name=<span class="code-quote">"org.apache.geronimo.configs/tomcat6/2.2/car"</span>&gt;
    &lt;gbean name=<span class="code-quote">"AccessLogValve"</span>&gt;
        &lt;reference name=<span class="code-quote">"NextValve"</span>&gt;
            &lt;pattern&gt;
                &lt;name&gt;SSOValve&lt;/name&gt;
            &lt;/pattern&gt;
            &lt;/reference&gt;
    &lt;/gbean&gt;
    &lt;gbean gbeanInfo=<span class="code-quote">"org.apache.geronimo.tomcat.ValveGBean"</span>
           name="org.apache.geronimo.configs/tomcat6/2.2/car?ServiceModule=org.apache.geronimo.configs/tomcat6/2.2/car,
           j2eeType=GBean,name=SSOValve"&gt;
           &lt;attribute name=<span class="code-quote">"className"</span>&gt;org.apache.catalina.authenticator.SingleSignOn&lt;/attribute&gt;
    &lt;/gbean&gt;
</pre>
</div></div>
	<ul>
		<li>The <b>j2eeType=</b> attribute in the added <b>&lt;gbean&gt;</b>
tags have been split across several lines for readability. In your file, the attribute must
be on a single line. Also, you can add the other Valves by replacing <tt>org.apache.catalina.authenticator.SingleSignOn</tt>
in the <tt>&lt;attribute name="className"&gt; &lt;/attribute&gt;</tt>
block.</li>
	</ul>
	</li>
</ol>




<h2><a name="ManagingValve-Configureavalvechain"></a>Configure a valve chain</h2>

<p>Valves chained to the Tomcat engine are invoked for requests received by all the
virtual hosts. In some cases, you might want to customize the valve chain for a given host.
In this case, use the following procedure:</p>

<ol>
	<li>Stop the server.</li>
	<li>Backup  <tt>&lt;geronimo_home&gt;/var/config/config.xml</tt>
file and then open it in an editor.</li>
	<li>Add the following code right after the <b>&lt;module name="org.apache.geronimo.configs/tomcat6/2.2/car"&gt;</b>
tag to define a valve chain, and then restart the server after you save the file.
<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<pre class="code-java">
&lt;module name=<span class="code-quote">"org.apache.geronimo.configs/tomcat6/2.2/car"</span>&gt;
	&lt;gbean name=<span class="code-quote">"TomcatHost"</span>&gt;
		...
		&lt;reference name=<span class="code-quote">"TomcatValveChain"</span>&gt;
			&lt;pattern&gt;
				&lt;name&gt;valve0&lt;/name&gt;
			&lt;/pattern&gt;
		&lt;/reference&gt;
	&lt;/gbean&gt;
	&lt;gbean gbeanInfo=<span class="code-quote">"org.apache.geronimo.tomcat.ValveGBean"</span>
     
	       name="org.apache.geronimo.configs/tomcat6/2.2/car?ServiceModule=org.apache.geronimo.configs/tomcat6/2.2/car,
               j2eeType=GBean,name=valve0"&gt;
	       &lt;attribute name=<span class="code-quote">"className"</span>&gt;class&lt;/attribute&gt;
	       &lt;attribute name=<span class="code-quote">"initParams"</span>&gt;parms&lt;/attribute&gt;
	       &lt;reference name=<span class="code-quote">"TomcatValveChain"</span>&gt;
			&lt;pattern&gt;
				&lt;name&gt;valve1&lt;/name&gt;
			&lt;/pattern&gt;
		&lt;/reference&gt;
	&lt;/gbean&gt;
	&lt;gbean gbeanInfo=<span class="code-quote">"org.apache.geronimo.tomcat.ValveGBean"</span>
     
	       name="org.apache.geronimo.configs/tomcat6/2.2/car?ServiceModule=org.apache.geronimo.configs/tomcat6/2.2/car,
               j2eeType=GBean,name=valve1"&gt;
	       &lt;attribute name=<span class="code-quote">"className"</span>&gt;class&lt;/attribute&gt;
	       &lt;attribute name=<span class="code-quote">"initParams"</span>&gt;parms&lt;/attribute&gt;
	       &lt;reference name=<span class="code-quote">"TomcatValveChain"</span>&gt;
			&lt;pattern&gt;
				&lt;name&gt;valve2&lt;/name&gt;
			&lt;/pattern&gt;
		&lt;/reference&gt;
	&lt;/gbean&gt;
        ...
	&lt;gbean gbeanInfo=<span class="code-quote">"org.apache.geronimo.tomcat.ValveGBean"</span>
     
	       name="org.apache.geronimo.configs/tomcat6/2.2/car?ServiceModule=org.apache.geronimo.configs/tomcat6/2.2/car,
               j2eeType=GBean,name=valvex"&gt;
	       &lt;attribute name=<span class="code-quote">"className"</span>&gt;class&lt;/attribute&gt;
	       &lt;attribute name=<span class="code-quote">"initParams"</span>&gt;parms&lt;/attribute&gt;
	&lt;/gbean&gt;
</pre>
</div></div>
<p>where</p></li>
</ol>


<ul>
	<li><em>TomcatHost</em> is the name of the Tomcat virtual host GBean that
is to be customized.</li>
	<li><em>valve0</em> is the system unique name for the first valve GBean
in the chain.</li>
	<li><em>valve1</em> is the system unique name for the second valve GBean
in the chain.</li>
	<li><em>valvex</em> is the system unique name for the last valve GBean
in the chain.</li>
	<li><em>class</em> is the class name of a valid <a href="http://tomcat.apache.org/tomcat-6.0-doc/config/valve.html"
title="The Valve Component" class="external-link" rel="nofollow">Tomcat valve</a>.</li>
	<li><em>parms</em> is a white space separated list of valve parameters.
In this list, each parameter has the form <em>key=value</em> where <em>key</em>
is the keyword for the parameter and <em>value</em> is the value of the parameter.
 See the valve's documentation for information about supported parameters, if any.</li>
</ul>

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