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| <title>Working with Jetty JNDI</title><link rel="stylesheet" type="text/css" href="css/docbook.css"><meta name="generator" content="DocBook XSL-NS Stylesheets V1.76.1"><meta name="keywords" content="jetty, servlet, servlet-api, cometd, http, websocket, eclipse, maven, java, server, software"><link rel="home" href="index.html" title="Jetty : The Definitive Reference"><link rel="up" href="jndi.html" title="Chapter 11. Configuring JNDI"><link rel="prev" href="jndi.html" title="Chapter 11. Configuring JNDI"><link rel="next" href="jndi-configuration.html" title="Configuring JNDI"><link xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times" rel="shortcut icon" href="images/favicon.ico"><script type="text/javascript" src="js/shCore.js"></script><script type="text/javascript" src="js/shBrushJava.js"></script><script type="text/javascript" src="js/shBrushXml.js"></script><script type="text/javascript" src="js/shBrushBash.js"></script><script type="text/javascript" src="js/shBrushJScript.js"></script><script type="text/javascript" src="js/shBrushSql.js"></script><script type="text/javascript" src="js/shBrushProperties.js"></script><script type="text/javascript" src="js/shBrushPlain.js"></script><link type="text/css" rel="stylesheet" href="css/shCore.css"><link type="text/css" rel="stylesheet" href="css/shThemeEclipse.css"><link type="text/css" rel="stylesheet" href="css/font-awesome.min.css"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><table xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><tr><td style="width: 25%"><a href="http://www.eclipse.org/jetty"><img src="images/jetty-header-logo.png" alt="Jetty Logo"></a><br><span style="font-size: small"> |
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| </p></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="using-jetty-jndi"></a>Working with Jetty JNDI</h2></div></div></div><div class="toc"><dl><dt><span class="section"><a href="using-jetty-jndi.html#d0e9947">Defining the web.xml</a></span></dt><dt><span class="section"><a href="using-jetty-jndi.html#defining-jndi-naming-entries">Declaring Resources</a></span></dt><dt><span class="section"><a href="using-jetty-jndi.html#jndi-where-to-declare">Deciding Where to Declare Resources</a></span></dt><dt><span class="section"><a href="using-jetty-jndi.html#jndi-name-scope">Scope of Resource Names</a></span></dt><dt><span class="section"><a href="using-jetty-jndi.html#binding-objects-into-jetty-jndi">What Can Be Bound as a Resource?</a></span></dt></dl></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="d0e9947"></a>Defining the web.xml</h3></div></div></div><p>You can configure naming resources to reference in a |
| <code class="filename">web.xml</code> file and access from within the |
| <code class="code">java:comp/env</code> naming environment of the webapp during |
| execution. Specifically, you can configure support for the following |
| <code class="filename">web.xml</code> elements:</p><div class="informalexample"><script type="syntaxhighlighter" class="brush: xml;toolbar: false"> |
| <![CDATA[ |
| |
| <env-entry/> |
| <resource-ref/> |
| <resource-env-ref/> |
| |
| ]]> |
| </script></div><p><a class="link" href="jndi-configuration.html#configuring-jndi-env-entries" title="Configuring JNDI env-entries">Configuring |
| env-entries</a> shows you how to set up overrides for <code class="code"> |
| env-entry</code> elements in <code class="filename">web.xml</code>, while <a class="link" href="jndi-configuration.html#configuring-resource-refs-and-resource-env-refs" title="Configuring resource-refs and resource-env-refs">Configuring |
| <code class="code">resource-refs</code> and <code class="code">resource-env-refs</code></a> discusses how to configure |
| support resources such as <code class="code">javax.sql.DataSource</code>.</p><p>You can also plug a JTA |
| <code class="code">javax.transaction.UserTransaction</code> implementation into Jetty |
| so that webapps can look up <code class="code">java:comp/UserTransaction</code> to |
| obtain a distributed transaction manager: see <a class="link" href="jndi-configuration.html#configuring-xa-transactions" title="Configuring XA Transactions">Configuring XA |
| Transactions</a>.</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="defining-jndi-naming-entries"></a>Declaring Resources</h3></div></div></div><p>You must declare the objects you want bound into the Jetty |
| environment so that you can then hook into your webapp via <code class="code">env-entry, |
| resource-ref</code> and <code class="code">resource-env-refs</code> in <code class="filename">web.xml</code>. You create these bindings |
| by using declarations of the following types:</p><div class="variablelist"><dl><dt><span class="term"><code class="code">org.eclipse.jetty.plus.jndi.EnvEntry</code></span></dt><dd><p>for <code class="code">env-entry</code> type of entries</p></dd><dt><span class="term"><code class="code">org.eclipse.jetty.plus.jndi.Resource</code></span></dt><dd><p>for all other type of resources</p></dd><dt><span class="term"><code class="code">org.eclipse.jetty.plus.jndi.Transaction</code></span></dt><dd><p>for a JTA manager</p></dd><dt><span class="term"><code class="code">org.eclipse.jetty.plus.jndi.Link</code></span></dt><dd><p>for link between a <code class="filename">web.xml</code> resource name and a naming entry</p></dd></dl></div><p>Declarations of each of these types follow the same general pattern:</p><div class="informalexample"><script type="syntaxhighlighter" class="brush: xml;toolbar: false"> |
| <![CDATA[ |
| |
| <New class="org.eclipse.jetty.plus.jndi.xxxx"> |
| <Arg><!-- scope --></Arg> |
| <Arg><!-- name --></Arg> |
| <Arg><!-- value --></Arg> |
| </New> |
| |
| ]]> |
| </script></div><p>You can place these declarations into three different |
| files, depending on your needs and the <a class="link" href="using-jetty-jndi.html#jndi-name-scope" title="Scope of Resource Names">scope</a> of the resources being |
| declared.</p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="jndi-where-to-declare"></a>Deciding Where to Declare Resources</h3></div></div></div><p>You can define naming resources in three places:</p><div class="variablelist"><dl><dt><span class="term">jetty.xml</span></dt><dd><p>Naming resources defined in a |
| <code class="filename">jetty.xml</code> file are <a class="link" href="using-jetty-jndi.html#jndi-name-scope" title="Scope of Resource Names">scoped</a> at either the JVM level |
| or the Server level. The classes for the resource must |
| be visible at the Jetty container level. If the classes for the |
| resource only exist inside your webapp, you must declare it in a |
| <code class="filename">WEB-INF/jetty-env.xml</code> file.</p></dd><dt><span class="term">WEB-INF/jetty-env.xml</span></dt><dd><p>Naming resources in a |
| <code class="filename">WEB-INF/jetty-env.xml</code> file are <a class="link" href="using-jetty-jndi.html#jndi-name-scope" title="Scope of Resource Names">scoped</a> to the web app in which |
| the file resides. While you can enter JVM or Server scopes if |
| you choose, we do not recommend doing so. The resources defined |
| here may use classes from inside your webapp. This is |
| a Jetty-specific mechanism.</p></dd><dt><span class="term">context xml file</span></dt><dd><p>Entries in a context xml file should be <a class="link" href="using-jetty-jndi.html#jndi-name-scope" title="Scope of Resource Names">scoped</a> at the level of the |
| webapp to which they apply, although you can supply a less |
| strict scoping level of Server or JVM if you choose. As with |
| resources declared in a <code class="filename">jetty.xml</code> file, classes associated with |
| the resource must be visible on the container's classpath.</p></dd></dl></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="jndi-name-scope"></a>Scope of Resource Names</h3></div></div></div><p>Naming resources within Jetty belong to one of three different |
| scopes, in increasing order of restrictiveness:</p><div class="variablelist"><dl><dt><span class="term">JVM scope</span></dt><dd><p>The name is unique across the JVM instance, and is |
| visible to all application code. You represent this scope by a |
| <code class="code">null</code> first parameter to the resource declaration. |
| For example:</p><div class="informalexample"><script type="syntaxhighlighter" class="brush: xml;toolbar: false"> |
| <![CDATA[ |
| |
| <New id="cf" class="org.eclipse.jetty.plus.jndi.Resource"> |
| <Arg></Arg> <!-- empty arg --> |
| <Arg>jms/connectionFactory</Arg> |
| <Arg> |
| <New class="org.apache.activemq.ActiveMQConnectionFactory"> |
| <Arg>vm://localhost?broker.persistent=false</Arg> |
| </New> |
| </Arg> |
| </New> |
| |
| ]]> |
| </script></div></dd><dt><span class="term">Server scope</span></dt><dd><p>The name is unique to a Server instance, and is only |
| visible to code associated with that instance. You represent this scope by referencing the Server instance as the first |
| parameter to the resource declaration. For example:</p><div class="informalexample"><script type="syntaxhighlighter" class="brush: xml;toolbar: false"> |
| <![CDATA[ |
| |
| <Configure id="Server" class="org.eclipse.jetty.Server"> |
| <New id="cf" class="org.eclipse.jetty.plus.jndi.Resource"> |
| <Arg><Ref refid="Server"/></Arg> <!-- reference to Server instance --> |
| <Arg>jms/connectionFactory</Arg> |
| <Arg> |
| <New class="org.apache.activemq.ActiveMQConnectionFactory"> |
| <Arg>vm://localhost?broker.persistent=false</Arg> |
| </New> |
| </Arg> |
| </New> |
| </Configure> |
| |
| ]]> |
| </script></div></dd><dt><span class="term">Webapp scope</span></dt><dd><p>The name is unique to the WebAppContext instance, and |
| is only visible to code associated with that instance. You represent this scope by referencing the WebAppContext instance |
| as the first parameter to the resource declaration. |
| For example:</p><div class="informalexample"><script type="syntaxhighlighter" class="brush: xml;toolbar: false"> |
| <![CDATA[ |
| |
| <Configure id='wac' class="org.eclipse.jetty.webapp.WebAppContext"> |
| <New id="cf" class="org.eclipse.jetty.plus.jndi.Resource"> |
| <Arg><Ref refid='wac'/></Arg> <!-- reference to WebAppContext --> |
| <Arg>jms/connectionFactory</Arg> |
| <Arg> |
| <New class="org.apache.activemq.ActiveMQConnectionFactory"> |
| <Arg>vm://localhost?broker.persistent=false</Arg> |
| </New> |
| </Arg> |
| </New> |
| </Configure> |
| |
| ]]> |
| </script></div></dd></dl></div></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a name="binding-objects-into-jetty-jndi"></a>What Can Be Bound as a Resource?</h3></div></div></div><p>You can bind four types of objects into a Jetty JNDI reference:</p><div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem"><p>An ordinary POJO instance.</p></li><li class="listitem"><p>A <a class="link" href="http://docs.oracle.com/javase/1.5.0/docs/api/javax/naming/Reference.html" target="_top"> |
| javax.naming.Reference</a> instance.</p></li><li class="listitem"><p>An object instance that implements the <a class="link" href="http://docs.oracle.com/javase/1.5.0/docs/api/javax/naming/Referenceable.html" target="_top"> |
| javax.naming.Referenceable</a> interface.</p></li><li class="listitem"><p>A link between a name as referenced in |
| <code class="filename">web.xml</code> and as referenced in the Jetty |
| environment.</p></li></ul></div></div></div><script type="text/javascript"> |
| SyntaxHighlighter.all() |
| </script><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="jndi.html"><i class="icon-chevron-left"></i> Previous</a> </td><td width="20%" align="center"><a accesskey="u" href="jndi.html"><i class="icon-chevron-up"></i> Top</a></td><td width="40%" align="right"> <a accesskey="n" href="jndi-configuration.html">Next <i class="icon-chevron-right"></i></a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 11. Configuring JNDI </td><td width="20%" align="center"><a accesskey="h" href="index.html"><i class="icon-home"></i> Home</a></td><td width="40%" align="right" valign="top"> Configuring JNDI</td></tr></table></div><p xmlns:jfetch="java:org.eclipse.jetty.xslt.tools.JavaSourceFetchExtension" xmlns:fetch="java:org.eclipse.jetty.xslt.tools.SourceFetchExtension" xmlns:d="http://docbook.org/ns/docbook" xmlns:l="http://docbook.sourceforge.net/xmlns/l10n/1.0" xmlns:xslthl="http://xslthl.sf.net" xmlns:gcse="http://www.google.com" xmlns:date="http://exslt.org/dates-and-times"><div class="jetty-callout"> |
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