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1<html><head><META http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><title>Apache Tomcat Configuration Reference - The Context Container</title><meta value="Craig R. McClanahan" name="author"><meta value="craigmcc@apache.org" name="email"></head><body vlink="#525D76" alink="#525D76" link="#525D76" text="#000000" bgcolor="#ffffff"><table cellspacing="0" width="100%" border="0"><!--PAGE HEADER--><tr><td><!--PROJECT LOGO--><a href="http://tomcat.apache.org/"><img border="0" alt="
2    The Apache Tomcat Servlet/JSP Container
3  " align="right" src="../../images/tomcat.gif"></a></td><td><font face="arial,helvetica,sanserif"><h1>Apache Tomcat 6.0</h1></font></td><td><!--APACHE LOGO--><a href="http://www.apache.org/"><img border="0" alt="Apache Logo" align="right" src="../../images/asf-logo.gif"></a></td></tr></table><table cellspacing="4" width="100%" border="0"><!--HEADER SEPARATOR--><tr><td colspan="2"><hr size="1" noshade></td></tr><tr><!--RIGHT SIDE MAIN BODY--><td align="left" valign="top" width="80%"><table cellspacing="4" width="100%" border="0"><tr><td valign="top" align="left"><h1>Apache Tomcat Configuration Reference</h1><h2>The Context Container</h2></td><td nowrap="true" valign="top" align="right"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr></table><table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#525D76"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Introduction"><strong>Introduction</strong></a></font></td></tr><tr><td><blockquote>
4
5    <blockquote><em>
6    <p>The description below uses the variable name $CATALINA_BASE to refer the
7    base directory against which most relative paths are resolved. If you have
8    not configured Tomcat 6 for multiple instances by setting a CATALINA_BASE
9    directory, then $CATALINA_BASE will be set to the value of $CATALINA_HOME,
10    the directory into which you have installed Tomcat 6.</p>
11    </em></blockquote>
12
13  <p>The <strong>Context</strong> element represents a <em>web
14  application</em>, which is run within a particular virtual host.
15  Each web application is based on a <em>Web Application Archive</em>
16  (WAR) file, or a corresponding directory containing the corresponding
17  unpacked contents, as described in the Servlet Specification (version
18  2.2 or later).  For more information about web application archives,
19  you can download the
20  <a href="http://java.sun.com/products/servlet/download.html">Servlet
21  Specification</a>, and review the Tomcat
22  <a href="../../appdev/index.html">Application Developer's Guide</a>.</p>
23
24  <p>The web application used to process each HTTP request is selected
25  by Catalina based on matching the longest possible prefix of the
26  Request URI against the <em>context path</em> of each defined Context.
27  Once selected, that Context will select an appropriate servlet to
28  process the incoming request, according to the servlet mappings defined
29  in the <em>web application deployment descriptor</em> file (which MUST
30  be located at <code>/WEB-INF/web.xml</code> within the web app's
31  directory hierarchy).</p>
32
33  <p>You may define as many <strong>Context</strong> elements as you
34  wish.  Each such Context MUST have a unique context path. In
35  addition, a Context must be present with a context path equal to
36  a zero-length string.  This Context becomes the <em>default</em>
37  web application for this virtual host, and is used to process all
38  requests that do not match any other Context's context path.</p>
39
40  <p><b>For Tomcat 6, unlike Tomcat 4.x, it is NOT recommended to place
41  &lt;Context&gt; elements directly in the server.xml file.</b> This
42  is because it makes modifing the <strong>Context</strong> configuration
43  more invasive since the main <code>conf/server.xml</code> file cannot be
44  reloaded without restarting Tomcat.</p>
45
46  <p><strong>Context</strong> elements may be explicitly defined:
47  <ul>
48  <li>in the <code>$CATALINA_BASE/conf/context.xml</code> file:
49  the Context element information will be loaded by all webapps</li>
50  <li>in the
51  <code>$CATALINA_BASE/conf/[enginename]/[hostname]/context.xml.default</code>
52  file: the Context element information will be loaded by all webapps of that
53  host</li>
54  <li>in individual files (with a ".xml" extension) in the
55  <code>$CATALINA_BASE/conf/[enginename]/[hostname]/</code> directory.
56  The name of the file (less the .xml extension) will be used as the
57  context path. Multi-level context paths may be defined using #, e.g.
58  <code>context#path.xml</code>. The default web application may be defined
59  by using a file called <code>ROOT.xml</code>.</li>
60  <li>if the previous file was not found for this application, in an individual
61  file at <code>/META-INF/context.xml</code> inside the application files</li>
62  <li>inside a <a href="host.html">Host</a> element in the main
63  <code>conf/server.xml</code></li>
64  </ul>
65  </p>
66
67  <p>With the exception of server.xml, files that define <strong>Context
68  </strong> elements may only define a single <strong>Context</strong> element.
69  </p>
70
71  <p>In addition to explicitly specified Context elements, there are
72  several techniques by which Context elements can be created automatically
73  for you.  See <a href="host.html#Automatic Application Deployment">
74  Automatic Application Deployment</a> and
75  <a href="host.html#User Web Applications">User Web Applications</a>
76  for more information.</p>
77
78</blockquote></td></tr></table><table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#525D76"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Attributes"><strong>Attributes</strong></a></font></td></tr><tr><td><blockquote>
79
80  <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Common Attributes"><strong>Common Attributes</strong></a></font></td></tr><tr><td><blockquote>
81
82    <p>All implementations of <strong>Context</strong>
83    support the following attributes:</p>
84
85    <table cellpadding="5" border="1"><tr><th bgcolor="#023264" width="15%"><font color="#ffffff">Attribute</font></th><th bgcolor="#023264" width="85%"><font color="#ffffff">Description</font></th></tr><tr><td valign="center" align="left"><code>backgroundProcessorDelay</code></td><td valign="center" align="left">
86        <p>This value represents the delay in seconds between the
87        invocation of the backgroundProcess method on this context and
88        its child containers, including all wrappers.
89        Child containers will not be invoked if their delay value is not
90        negative (which would mean they are using their own processing
91        thread). Setting this to a positive value will cause
92        a thread to be spawn. After waiting the specified amount of time,
93        the thread will invoke the backgroundProcess method on this host
94        and all its child containers. A context will use background
95        processing to perform session expiration and class monitoring for
96        reloading. If not specified, the default value for this attribute is
97        -1, which means the context will rely on the background processing
98        thread of its parent host.</p>
99      </td></tr><tr><td valign="center" align="left"><code>className</code></td><td valign="center" align="left">
100        <p>Java class name of the implementation to use.  This class must
101        implement the <code>org.apache.catalina.Context</code> interface.
102        If not specified, the standard value (defined below) will be used.</p>
103      </td></tr><tr><td valign="center" align="left"><code>cookies</code></td><td valign="center" align="left">
104        <p>Set to <code>true</code> if you want cookies to be used for
105        session identifier communication if supported by the client (this
106        is the default).  Set to <code>false</code> if you want to disable
107        the use of cookies for session identifier communication, and rely
108        only on URL rewriting by the application.</p>
109      </td></tr><tr><td valign="center" align="left"><code>crossContext</code></td><td valign="center" align="left">
110        <p>Set to <code>true</code> if you want calls within this application
111        to <code>ServletContext.getContext()</code> to successfully return a
112        request dispatcher for other web applications running on this virtual
113        host.  Set to <code>false</code> (the default) in security
114        conscious environments, to make <code>getContext()</code> always
115        return <code>null</code>.</p>
116      </td></tr><tr><td valign="center" align="left"><strong><code>docBase</code></strong></td><td valign="center" align="left">
117        <p>The <em>Document Base</em> (also known as the <em>Context
118        Root</em>) directory for this web application, or the pathname
119        to the web application archive file (if this web application is
120        being executed directly from the WAR file). You may specify
121        an absolute pathname for this directory or WAR file, or a pathname
122        that is relative to the <code>appBase</code> directory of the
123        owning <a href="host.html">Host</a>.</p>
124        <p>The value of this field must not be set when the Context is
125        configured using a <code>META-INF/context.xml</code> file as it will be
126        inferred by the automatic deployment process.</p>
127      </td></tr><tr><td valign="center" align="left"><code>override</code></td><td valign="center" align="left">
128        <p>Set to <code>true</code> to have explicit settings in this
129        Context element override any corresponding settings in the
130        <a href="defaultcontext.html">DefaultContext</a> element associated
131        with our owning <a href="host.html">Host</a>.  By default, settings
132        in the DefaultContext element will be used.</p>
133        <p>If a symbolic link is used for docBase then changes to the
134        symbolic link will only be effective after a Tomcat restart or
135        by undeploying and redeploying the conext. A context reload is not
136        sufficient.</p>
137      </td></tr><tr><td valign="center" align="left"><code>privileged</code></td><td valign="center" align="left">
138        <p>Set to <code>true</code> to allow this context to use container
139        servlets, like the manager servlet. Use of the <code>privileged</code>
140        attribute will change the context's parent class loader to be the
141        <em>Server</em> class loader rather than the <em>Shared</em> class
142        loader. Note that in a default installation, the <em>Common</em> class
143        loader is used for both the <em>Server</em> and the <em>Shared</em>
144        class loaders.</p>
145      </td></tr><tr><td valign="center" align="left"><code>path</code></td><td valign="center" align="left">
146        <p>The <em>context path</em> of this web application, which is
147        matched against the beginning of each request URI to select the
148        appropriate web application for processing.  All of the context paths
149        within a particular <a href="host.html">Host</a> must be unique.
150        If you specify a context path of an empty string (""), you are
151        defining the <em>default</em> web application for this Host, which
152        will process all requests not assigned to other Contexts.</p>
153        <p>The value of this field must not be set except when statically
154        defining a Context in server.xml, as it will be inferred from the
155        filenames used for either the .xml context file or the docBase.</p>
156      </td></tr><tr><td valign="center" align="left"><code>reloadable</code></td><td valign="center" align="left">
157        <p>Set to <code>true</code> if you want Catalina to monitor classes in
158        <code>/WEB-INF/classes/</code> and <code>/WEB-INF/lib</code> for
159        changes, and automatically reload the web application if a change
160        is detected.  This feature is very useful during application
161        development, but it requires significant runtime overhead and is
162        not recommended for use on deployed production applications.  That's
163        why the default setting for this attribute is <i>false</i>.  You
164        can use the <a href="../../manager-howto.html">Manager</a> web
165        application, however, to trigger reloads of deployed applications
166        on demand.</p>
167      </td></tr><tr><td valign="center" align="left"><code>wrapperClass</code></td><td valign="center" align="left">
168        <p>Java class name of the <code>org.apache.catalina.Wrapper</code>
169        implementation class that will be used for servlets managed by this
170        Context.  If not specified, a standard default value will be used.</p>
171      </td></tr></table>
172
173  </blockquote></td></tr></table>
174
175
176  <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Standard Implementation"><strong>Standard Implementation</strong></a></font></td></tr><tr><td><blockquote>
177
178    <p>The standard implementation of <strong>Context</strong> is
179    <strong>org.apache.catalina.core.StandardContext</strong>.
180    It supports the following additional attributes (in addition to the
181    common attributes listed above):</p>
182
183    <table cellpadding="5" border="1"><tr><th bgcolor="#023264" width="15%"><font color="#ffffff">Attribute</font></th><th bgcolor="#023264" width="85%"><font color="#ffffff">Description</font></th></tr><tr><td valign="center" align="left"><code>allowLinking</code></td><td valign="center" align="left">
184        <p>If the value of this flag is <code>true</code>, symlinks will be
185        allowed inside the web application, pointing to resources outside the
186        web application base path. If not specified, the default value
187        of the flag is <code>false</code>.</p>
188        <p><b>NOTE: This flag MUST NOT be set to true on the Windows platform
189        (or any other OS which does not have a case sensitive filesystem),
190        as it will disable case sensitivity checks, allowing JSP source code
191        disclosure, among other security problems.</b></p>
192      </td></tr><tr><td valign="center" align="left"><code>antiJARLocking</code></td><td valign="center" align="left">
193        <p>If true, the Tomcat classloader will take extra measures to avoid
194        JAR file locking when resources are accessed inside JARs through URLs.
195        This will impact startup time of applications, but could prove to be useful
196        on platforms or configurations where file locking can occur.
197        If not specified, the default value is <code>false</code>.</p>
198      </td></tr><tr><td valign="center" align="left"><code>antiResourceLocking</code></td><td valign="center" align="left">
199        <p>If true, Tomcat will prevent any file locking.
200        This will significantly impact startup time of applications,
201        but allows full webapp hot deploy and undeploy on platforms
202        or configurations where file locking can occur.
203        If not specified, the default value is <code>false</code>.</p>
204   
205        <p>Please note that setting this to <code>true</code> has some side effects,
206        including the disabling of JSP reloading in a running server: see
207        <a href="http://issues.apache.org/bugzilla/show_bug.cgi?id=37668">Bugzilla 37668</a>.
208        </p>
209
210        <p>
211        Please note that setting this flag to true in applications that are
212        outside the appBase for the Host (the <code>webapps</code> directory
213        by default) will cause the application to be
214        <strong>deleted</strong> on Tomcat shutdown.  You probably don't want to
215        do this, so think twice before setting antiResourceLocking=true on a webapp
216        that's outside the appBase for its Host.
217        </p>
218      </td></tr><tr><td valign="center" align="left"><code>cacheMaxSize</code></td><td valign="center" align="left">
219        <p>Maximum size of the static resource cache in kilobytes.
220        If not specified, the default value is <code>10240</code>
221        (10 megabytes).</p>
222      </td></tr><tr><td valign="center" align="left"><code>cacheTTL</code></td><td valign="center" align="left">
223        <p>Amount of time in milliseconds between cache entries revalidation.
224        If not specified, the default value is <code>5000</code> 
225        (5 seconds).</p>
226      </td></tr><tr><td valign="center" align="left"><code>cachingAllowed</code></td><td valign="center" align="left">
227        <p>If the value of this flag is <code>true</code>, the cache for static
228        resources will be used. If not specified, the default value
229        of the flag is <code>true</code>.</p>
230      </td></tr><tr><td valign="center" align="left"><code>caseSensitive</code></td><td valign="center" align="left">
231        <p>If the value of this flag is <code>true</code>, all case sensitivity
232        checks will be disabled. If not
233        specified, the default value of the flag is <code>true</code>.</p>
234        <p><b>NOTE: This flag MUST NOT be set to false on the Windows platform
235        (or any other OS which does not have a case sensitive filesystem),
236        as it will disable case sensitivity checks, allowing JSP source code
237        disclosure, among other security problems.</b></p>
238      </td></tr><tr><td valign="center" align="left"><code>processTlds</code></td><td valign="center" align="left">
239        <p>Whether the context should process TLDs on startup.  The default
240        is true.  The false setting is intended for special cases
241        that know in advance TLDs are not part of the webapp.</p>
242      </td></tr><tr><td valign="center" align="left"><code>swallowOutput</code></td><td valign="center" align="left">
243        <p>If the value of this flag is <code>true</code>, the bytes output to
244        System.out and System.err by the web application will be redirected to
245        the web application logger. If not specified, the default value
246        of the flag is <code>false</code>.</p>
247      </td></tr><tr><td valign="center" align="left"><code>tldNamespaceAware</code></td><td valign="center" align="left">
248        <p>If the value of this flag is <code>true</code>, the TLD files
249        XML validation will be namespace-aware.  If you turn this flag on,
250        you should probably also turn <code>tldValidation</code> on.  The
251        default value for this flag is <code>false</code>, and setting it
252        to true will incur a performance penalty.
253        </p>
254      </td></tr><tr><td valign="center" align="left"><code>tldValidation</code></td><td valign="center" align="left">
255        <p>If the value of this flag is <code>true</code>, the TLD files
256        will be XML validated on context startup.  The default value for
257        this flag is <code>false</code>, and setting it to true will incur
258        a performance penalty.</p>
259      </td></tr><tr><td valign="center" align="left"><code>unloadDelay</code></td><td valign="center" align="left">
260        <p>Amount of ms that the container will wait for servlets to unload.
261        If not specified, the default value of the flag is <code>2000</code> 
262        ms.</p>
263      </td></tr><tr><td valign="center" align="left"><code>unpackWAR</code></td><td valign="center" align="left">
264        <p>If true, Tomcat will unpack all compressed web applications before
265        running them.
266        If not specified, the default value is <code>true</code>.</p>
267      </td></tr><tr><td valign="center" align="left"><code>useNaming</code></td><td valign="center" align="left">
268        <p>Set to <code>true</code> (the default) to have Catalina enable a
269        JNDI <code>InitialContext</code> for this web application that is
270        compatible with Java2 Enterprise Edition (J2EE) platform
271        conventions.</p>
272      </td></tr><tr><td valign="center" align="left"><code>workDir</code></td><td valign="center" align="left">
273        <p>Pathname to a scratch directory to be provided by this Context
274        for temporary read-write use by servlets within the associated web
275        application.  This directory will be made visible to servlets in the
276        web application by a servlet context attribute (of type
277        <code>java.io.File</code>) named
278        <code>javax.servlet.context.tempdir</code> as described in the
279        Servlet Specification.  If not specified, a suitable directory
280        underneath <code>$CATALINA_BASE/work</code> will be provided.</p>
281      </td></tr></table>
282
283  </blockquote></td></tr></table>
284
285
286</blockquote></td></tr></table><table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#525D76"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Nested Components"><strong>Nested Components</strong></a></font></td></tr><tr><td><blockquote>
287
288  <p>You can nest at most one instance of the following utility components
289  by nesting a corresponding element inside your <strong>Context</strong>
290  element:</p>
291  <ul>
292  <li><a href="loader.html"><strong>Loader</strong></a> -
293      Configure the web application class loader that will be used to load
294      servlet and bean classes for this web application.  Normally, the
295      default configuration of the class loader will be sufficient.</li>
296  <li><a href="manager.html"><strong>Manager</strong></a> -
297      Configure the session manager that will be used to create, destroy,
298      and persist HTTP sessions for this web application.  Normally, the
299      default configuration of the session manager will be sufficient.</li>
300  <li><a href="realm.html"><strong>Realm</strong></a> -
301      Configure a realm that will allow its
302      database of users, and their associated roles, to be utilized solely
303      for this particular web application.  If not specified, this web
304      application will utilize the Realm associated with the owning
305      <a href="host.html">Host</a> or <a href="engine.html">Engine</a>.</li>
306  <li><a href="resources.html"><strong>Resources</strong></a> -
307      Configure the resource manager that will be used to access the static
308      resources associated with this web application.  Normally, the
309      default configuration of the resource manager will be sufficient.</li>
310  <li><strong>WatchedResource</strong> - The auto deployer will monitor the
311      specified static resource of the web application for updates, and will
312      reload the web application if is is updated. The content of this element
313      must be a string.</li>
314  </ul>
315
316</blockquote></td></tr></table><table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#525D76"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Special Features"><strong>Special Features</strong></a></font></td></tr><tr><td><blockquote>
317
318
319  <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Logging"><strong>Logging</strong></a></font></td></tr><tr><td><blockquote>
320
321    <p>A context is associated with the
322       <code>org.apache.catalina.core.ContainerBase.[enginename].[hostname].[path]</code>
323       log category.  Note that the brackets are actually part of the name, don't omit them.</p>
324
325  </blockquote></td></tr></table>
326
327
328  <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Access Logs"><strong>Access Logs</strong></a></font></td></tr><tr><td><blockquote>
329
330    <p>When you run a web server, one of the output files normally generated
331    is an <em>access log</em>, which generates one line of information for
332    each request processed by the server, in a standard format.  Catalina
333    includes an optional <a href="valve.html">Valve</a> implementation that
334    can create access logs in the same standard format created by web servers,
335    or in any number of custom formats.</p>
336
337    <p>You can ask Catalina to create an access log for all requests
338    processed by an <a href="engine.html">Engine</a>,
339    <a href="host.html">Host</a>, or <a href="context.html">Context</a>
340    by nesting a <a href="valve.html">Valve</a> element like this:</p>
341
342<div align="left"><table border="0" cellpadding="0" cellspacing="4"><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#ffffff"><pre>
343&lt;Context path="/examples" ...&gt;
344  ...
345  &lt;Valve className="org.apache.catalina.valves.AccessLogValve"
346         prefix="localhost_access_log." suffix=".txt"
347         pattern="common"/&gt;
348  ...
349&lt;/Context&gt;
350</pre></td><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr></table></div>
351
352    <p>See <a href="valve.html#Access Log Valve">Access Log Valve</a>
353    for more information on the configuration attributes that are
354    supported.</p>
355
356  </blockquote></td></tr></table>
357
358
359  <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Automatic Context Configuration"><strong>Automatic Context Configuration</strong></a></font></td></tr><tr><td><blockquote>
360
361    <p>If you use the standard <strong>Context</strong> implementation,
362    the following configuration steps occur automtically when Catalina
363    is started, or whenever this web application is reloaded.  No special
364    configuration is required to enable this feature.</p>
365   
366    <ul>
367    <li>If you have not declared your own <a href="loader.html">Loader</a>
368       element, a standard web application class loader will be configured.
369       </li>
370    <li>If you have not declared your own <a href="manager.html">Manager</a>
371        element, a standard session manager will be configured.</li>
372    <li>If you have not declared your own <a href="resources.html">Resources</a>
373        element, a standard resources manager will be configured.</li>
374    <li>The web application properties listed in <code>conf/web.xml</code>
375        will be processed as defaults for this web application.  This is used
376        to establish default mappings (such as mapping the <code>*.jsp</code>
377        extension to the corresponding JSP servlet), and other standard
378        features that apply to all web applications.</li>
379    <li>The web application properties listed in the
380        <code>/WEB-INF/web.xml</code> resource for this web application
381        will be processed (if this resource exists).</li>
382    <li>If your web application has specified security constraints that might
383        require user authentication, an appropriate Authenticator that
384        implements the login method you have selected will be configured.</li>
385    </ul>
386
387  </blockquote></td></tr></table>
388
389
390  <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Context Parameters"><strong>Context Parameters</strong></a></font></td></tr><tr><td><blockquote>
391
392    <p>You can configure named values that will be made visible to the
393    web application as servlet context initialization parameters by nesting
394    <code>&lt;Parameter&gt;</code> elements inside this element.  For
395    example, you can create an initialization parameter like this:</p>
396<div align="left"><table border="0" cellpadding="0" cellspacing="4"><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#ffffff"><pre>
397&lt;Context ...&gt;
398  ...
399  &lt;Parameter name="companyName" value="My Company, Incorporated"
400         override="false"/&gt;
401  ...
402&lt;/Context&gt;
403</pre></td><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr></table></div>
404
405    <p>This is equivalent to the inclusion of the following element in the
406    web application deployment descriptor (<code>/WEB-INF/web.xml</code>):
407    </p>
408<div align="left"><table border="0" cellpadding="0" cellspacing="4"><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#ffffff"><pre>
409&lt;context-param&gt;
410  &lt;param-name&gt;companyName&lt;/param-name&gt;
411  &lt;param-value&gt;My Company, Incorporated&lt;/param-value&gt;
412&lt;/context-param&gt;
413</pre></td><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr></table></div>
414    <p>but does <em>not</em> require modification of the deployment descriptor
415    to customize this value.</p>
416
417    <p>The valid attributes for a <code>&lt;Parameter&gt;</code> element
418    are as follows:</p>
419
420    <table cellpadding="5" border="1"><tr><th bgcolor="#023264" width="15%"><font color="#ffffff">Attribute</font></th><th bgcolor="#023264" width="85%"><font color="#ffffff">Description</font></th></tr><tr><td valign="center" align="left"><code>description</code></td><td valign="center" align="left">
421        <p>Optional, human-readable description of this context
422        initialization parameter.</p>
423      </td></tr><tr><td valign="center" align="left"><strong><code>name</code></strong></td><td valign="center" align="left">
424        <p>The name of the context initialization parameter to be created.</p>
425      </td></tr><tr><td valign="center" align="left"><code>override</code></td><td valign="center" align="left">
426        <p>Set this to <code>false</code> if you do <strong>not</strong> want
427        a <code>&lt;context-param&gt;</code> for the same parameter name,
428        found in the web application deployment descriptor, to override the
429        value specified here.  By default, overrides are allowed.</p>
430      </td></tr><tr><td valign="center" align="left"><strong><code>value</code></strong></td><td valign="center" align="left">
431        <p>The parameter value that will be presented to the application
432        when requested by calling
433        <code>ServletContext.getInitParameter()</code>.</p>
434      </td></tr></table>
435
436  </blockquote></td></tr></table>
437
438
439  <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Environment Entries"><strong>Environment Entries</strong></a></font></td></tr><tr><td><blockquote>
440
441    <p>You can configure named values that will be made visible to the
442    web application as environment entry resources, by nesting
443    <code>&lt;Environment&gt;</code> entries inside this element.  For
444    example, you can create an environment entry like this:</p>
445<div align="left"><table border="0" cellpadding="0" cellspacing="4"><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#ffffff"><pre>
446&lt;Context ...&gt;
447  ...
448  &lt;Environment name="maxExemptions" value="10"
449         type="java.lang.Integer" override="false"/&gt;
450  ...
451&lt;/Context&gt;
452</pre></td><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr></table></div>
453
454    <p>This is equivalent to the inclusion of the following element in the
455    web application deployment descriptor (<code>/WEB-INF/web.xml</code>):
456    </p>
457<div align="left"><table border="0" cellpadding="0" cellspacing="4"><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#ffffff"><pre>
458&lt;env-entry&gt;
459  &lt;env-entry-name&gt;maxExemptions&lt;/param-name&gt;
460  &lt;env-entry-value&gt;10&lt;/env-entry-value&gt;
461  &lt;env-entry-type&gt;java.lang.Integer&lt;/env-entry-type&gt;
462&lt;/env-entry&gt;
463</pre></td><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr></table></div>
464    <p>but does <em>not</em> require modification of the deployment descriptor
465    to customize this value.</p>
466
467    <p>The valid attributes for an <code>&lt;Environment&gt;</code> element
468    are as follows:</p>
469
470    <table cellpadding="5" border="1"><tr><th bgcolor="#023264" width="15%"><font color="#ffffff">Attribute</font></th><th bgcolor="#023264" width="85%"><font color="#ffffff">Description</font></th></tr><tr><td valign="center" align="left"><code>description</code></td><td valign="center" align="left">
471        <p>Optional, human-readable description of this environment entry.</p>
472      </td></tr><tr><td valign="center" align="left"><strong><code>name</code></strong></td><td valign="center" align="left">
473        <p>The name of the environment entry to be created, relative to the
474        <code>java:comp/env</code> context.</p>
475      </td></tr><tr><td valign="center" align="left"><code>override</code></td><td valign="center" align="left">
476        <p>Set this to <code>false</code> if you do <strong>not</strong> want
477        an <code>&lt;env-entry&gt;</code> for the same environment entry name,
478        found in the web application deployment descriptor, to override the
479        value specified here.  By default, overrides are allowed.</p>
480      </td></tr><tr><td valign="center" align="left"><strong><code>type</code></strong></td><td valign="center" align="left">
481        <p>The fully qualified Java class name expected by the web application
482        for this environment entry.  Must be one of the legal values for
483        <code>&lt;env-entry-type&gt;</code> in the web application deployment
484        descriptor:  <code>java.lang.Boolean</code>,
485        <code>java.lang.Byte</code>, <code>java.lang.Character</code>,
486        <code>java.lang.Double</code>, <code>java.lang.Float</code>,
487        <code>java.lang.Integer</code>, <code>java.lang.Long</code>,
488        <code>java.lang.Short</code>, or <code>java.lang.String</code>.</p>
489      </td></tr><tr><td valign="center" align="left"><strong><code>value</code></strong></td><td valign="center" align="left">
490        <p>The parameter value that will be presented to the application
491        when requested from the JNDI context.  This value must be convertable
492        to the Java type defined by the <code>type</code> attribute.</p>
493      </td></tr></table>
494
495  </blockquote></td></tr></table>
496
497
498  <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Lifecycle Listeners"><strong>Lifecycle Listeners</strong></a></font></td></tr><tr><td><blockquote>
499
500    <p>If you have implemented a Java object that needs to know when this
501    <strong>Context</strong> is started or stopped, you can declare it by
502    nesting a <strong>Listener</strong> element inside this element.  The
503    class name you specify must implement the
504    <code>org.apache.catalina.LifecycleListener</code> interface, and
505    the class must be packaged in a jar and placed in the
506    <code>$CATALINA_HOME/lib</code> directory.
507    It will be notified about the occurrence of the corresponding
508    lifecycle events.  Configuration of such a listener looks like this:</p>
509
510<div align="left"><table border="0" cellpadding="0" cellspacing="4"><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#ffffff"><pre>
511&lt;Context path="/examples" ...&gt;
512  ...
513  &lt;Listener className="com.mycompany.mypackage.MyListener" ... &gt;
514  ...
515&lt;/Context&gt;
516</pre></td><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr></table></div>
517
518    <p>Note that a Listener can have any number of additional properties
519    that may be configured from this element.  Attribute names are matched
520    to corresponding JavaBean property names using the standard property
521    method naming patterns.</p>
522
523  </blockquote></td></tr></table>
524
525
526  <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Request Filters"><strong>Request Filters</strong></a></font></td></tr><tr><td><blockquote>
527
528    <p>You can ask Catalina to check the IP address, or host name, on every
529    incoming request directed to the surrounding
530    <a href="engine.html">Engine</a>, <a href="host.html">Host</a>, or
531    <a href="context.html">Context</a> element.  The remote address or name
532    will be checked against a configured list of "accept" and/or "deny"
533    filters, which are defined using the Regular Expression syntax supported
534    by the <a href="http://jakarta.apache.org/regexp/">Jakarta Regexp</a>
535    regular expression library.  Requests that come from locations that are
536    not accepted will be rejected with an HTTP "Forbidden" error.
537    Example filter declarations:</p>
538
539<div align="left"><table border="0" cellpadding="0" cellspacing="4"><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#ffffff"><pre>
540&lt;Context path="/examples" ...&gt;
541  ...
542  &lt;Valve className="org.apache.catalina.valves.RemoteHostValve"
543         allow="*.mycompany.com,www.yourcompany.com"/&gt;
544  &lt;Valve className="org.apache.catalina.valves.RemoteAddrValve"
545         deny="192.168.1.*"/&gt;
546  ...
547&lt;/Context&gt;
548</pre></td><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr></table></div>
549
550    <p>See <a href="valve.html#Remote Address Filter">Remote Address Filter</a>
551    and <a href="valve.html#Remote Host Filter">Remote Host Filter</a> for
552    more information about the configuration options that are supported.</p>
553
554  </blockquote></td></tr></table>
555
556
557  <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Resource Definitions"><strong>Resource Definitions</strong></a></font></td></tr><tr><td><blockquote>
558
559    <p>You can declare the characteristics of the resource
560    to be returned for JNDI lookups of <code>&lt;resource-ref&gt;</code> and
561    <code>&lt;resource-env-ref&gt;</code> elements in the web application
562    deployment descriptor.  You <strong>MUST</strong> also define
563    the needed resource parameters as attributes of the <code>Resource</code> 
564    element, to configure the object factory to be used (if not known to Tomcat
565    already), and the properties used to configure that object factory.</p>
566
567    <p>For example, you can create a resource definition like this:</p>
568<div align="left"><table border="0" cellpadding="0" cellspacing="4"><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#ffffff"><pre>
569&lt;Context ...&gt;
570  ...
571  &lt;Resource name="jdbc/EmployeeDB" auth="Container"
572            type="javax.sql.DataSource"
573     description="Employees Database for HR Applications"/&gt;
574  ...
575&lt;/Context&gt;
576</pre></td><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr></table></div>
577
578    <p>This is equivalent to the inclusion of the following element in the
579    web application deployment descriptor (<code>/WEB-INF/web.xml</code>):</p>
580<div align="left"><table border="0" cellpadding="0" cellspacing="4"><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#ffffff"><pre>
581&lt;resource-ref&gt;
582  &lt;description&gt;Employees Database for HR Applications&lt;/description&gt;
583  &lt;res-ref-name&gt;jdbc/EmployeeDB&lt;/res-ref-name&gt;
584  &lt;res-ref-type&gt;javax.sql.DataSource&lt;/res-ref-type&gt;
585  &lt;res-auth&gt;Container&lt;/res-auth&gt;
586&lt;/resource-ref&gt;
587</pre></td><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr></table></div>
588
589    <p>but does <em>not</em> require modification of the deployment
590    descriptor to customize this value.</p>
591
592    <p>The valid attributes for a <code>&lt;Resource&gt;</code> element
593    are as follows:</p>
594
595    <table cellpadding="5" border="1"><tr><th bgcolor="#023264" width="15%"><font color="#ffffff">Attribute</font></th><th bgcolor="#023264" width="85%"><font color="#ffffff">Description</font></th></tr><tr><td valign="center" align="left"><code>auth</code></td><td valign="center" align="left">
596        <p>Specify whether the web Application code signs on to the
597        corresponding resource manager programatically, or whether the
598        Container will sign on to the resource manager on behalf of the
599        application.  The value of this attribute must be
600        <code>Application</code> or <code>Container</code>.  This
601        attribute is <strong>required</strong> if the web application
602        will use a <code>&lt;resource-ref&gt;</code> element in the web
603        application deployment descriptor, but is optional if the
604        application uses a <code>&lt;resource-env-ref&gt;</code> instead.</p>
605      </td></tr><tr><td valign="center" align="left"><code>description</code></td><td valign="center" align="left">
606        <p>Optional, human-readable description of this resource.</p>
607      </td></tr><tr><td valign="center" align="left"><strong><code>name</code></strong></td><td valign="center" align="left">
608        <p>The name of the resource to be created, relative to the
609        <code>java:comp/env</code> context.</p>
610      </td></tr><tr><td valign="center" align="left"><code>scope</code></td><td valign="center" align="left">
611        <p>Specify whether connections obtained through this resource
612        manager can be shared.  The value of this attribute must be
613        <code>Shareable</code> or <code>Unshareable</code>.  By default,
614        connections are assumed to be shareable.</p>
615      </td></tr><tr><td valign="center" align="left"><strong><code>type</code></strong></td><td valign="center" align="left">
616        <p>The fully qualified Java class name expected by the web
617        application when it performs a lookup for this resource.</p>
618      </td></tr></table>
619
620
621  </blockquote></td></tr></table>
622
623
624  <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Resource Links"><strong>Resource Links</strong></a></font></td></tr><tr><td><blockquote>
625
626     <p>This element is used to create a link to a global JNDI resource. Doing
627     a JNDI lookup on the link name will then return the linked global
628     resource.</p>
629
630    <p>For example, you can create a resource link like this:</p>
631<div align="left"><table border="0" cellpadding="0" cellspacing="4"><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#ffffff"><pre>
632&lt;Context ...&gt;
633  ...
634  &lt;ResourceLink name="linkToGlobalResource"
635            global="simpleValue"
636            type="java.lang.Integer"
637  ...
638&lt;/Context&gt;
639</pre></td><td width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr><tr><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td><td height="1" width="1" bgcolor="#023264"><img border="0" hspace="0" vspace="0" height="1" width="1" src="../../images/void.gif"></td></tr></table></div>
640
641    <p>The valid attributes for a <code>&lt;ResourceLink&gt;</code> element
642    are as follows:</p>
643
644    <table cellpadding="5" border="1"><tr><th bgcolor="#023264" width="15%"><font color="#ffffff">Attribute</font></th><th bgcolor="#023264" width="85%"><font color="#ffffff">Description</font></th></tr><tr><td valign="center" align="left"><strong><code>global</code></strong></td><td valign="center" align="left">
645        <p>The name of the linked global resource in the
646        global JNDI context.</p>
647      </td></tr><tr><td valign="center" align="left"><strong><code>name</code></strong></td><td valign="center" align="left">
648        <p>The name of the resource link to be created, relative to the
649        <code>java:comp/env</code> context.</p>
650      </td></tr><tr><td valign="center" align="left"><strong><code>type</code></strong></td><td valign="center" align="left">
651        <p>The fully qualified Java class name expected by the web
652        application when it performs a lookup for this resource link.</p>
653      </td></tr></table>
654
655  </blockquote></td></tr></table>
656
657  <table cellpadding="2" cellspacing="0" border="0"><tr><td bgcolor="#828DA6"><font face="arial,helvetica.sanserif" color="#ffffff"><a name="Transaction"><strong>Transaction</strong></a></font></td></tr><tr><td><blockquote>
658
659    <p>You can declare the characteristics of the UserTransaction
660    to be returned for JNDI lookup for <code>java:comp/UserTransaction</code>.
661    You <strong>MUST</strong> define an object factory class to instantiate
662    this object as well as the needed resource parameters as attributes of the
663    <code>Transaction</code> 
664    element, and the properties used to configure that object factory.</p>
665
666    <p>The valid attributes for the <code>&lt;Transaction&gt;</code> element
667    are as follows:</p>
668
669    <table cellpadding="5" border="1"><tr><th bgcolor="#023264" width="15%"><font color="#ffffff">Attribute</font></th><th bgcolor="#023264" width="85%"><font color="#ffffff">Description</font></th></tr><tr><td valign="center" align="left"><strong><code>factory</code></strong></td><td valign="center" align="left">
670        <p>The class name for the JNDI object factory.</p>
671      </td></tr></table>
672
673  </blockquote></td></tr></table>
674
675</blockquote></td></tr></table></td></tr><!--FOOTER SEPARATOR--><tr><td colspan="2"><hr size="1" noshade></td></tr><!--PAGE FOOTER--><tr><td colspan="2"><div align="center"><font size="-1" color="#525D76"><em>
676        Copyright &copy; 1999-2008, Apache Software Foundation
677        </em></font></div></td></tr></table></body></html>
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