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From conflue...@apache.org
Subject [CONF] Apache Sling: Everything is a Resource (page edited)
Date Sat, 22 Dec 2007 15:15:00 GMT
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#foldertab li a:link { color: #ffffff; }
#foldertab li a:visited { color: #ffffff; }

#foldertab li a:hover {
color: #ffffff;
background: #003366;
border-color: #003366;
}

#foldertab li a.current {
background: white;
border-bottom: 1px solid white;
color: black;
}

#foldertab li a.current:link { color: black; }
#foldertab li a.current:visited { color: black; }
#foldertab li a.current:hover {
background: white;
border-bottom: 1px solid white;
color: black;
}

/* alphabet list */
ul#squaretab {
margin-left: 0;
padding-left: 0;
white-space: nowrap;
font: bold 8px Verdana, sans-serif;
}

#squaretab li {
display: inline;
list-style-type: none;
}

#squaretab a {
padding: 2px 6px;
border: 1px solid #3c78b5;
}

#squaretab a:link, #squaretab a:visited {
color: #fff;
background-color: #3c78b5;
text-decoration: none;
}

#squaretab a:hover {
color: #ffffff;
background-color: #003366;
border-color: #003366;
text-decoration: none;
}

#squaretab li a#current {
background: white;
color: black;
}

.blogcalendar * {
    font-family:verdana, arial, sans-serif;
    font-size:x-small;
    font-weight:normal;
    line-height:140%;
    padding:2px;
}


table.blogcalendar {
    border: 1px solid #3c78b5;
}

.blogcalendar th.calendarhead, a.calendarhead {
    font-size:x-small;
    font-weight:bold;
    padding:2px;
    text-transform:uppercase;
    background-color: #3c78b5;
    color: #ffffff;
    letter-spacing: .3em;
    text-transform: uppercase;
}

.calendarhead:visited {color: white;}
.calendarhead:active {color: white;}
.calendarhead:hover {color: white;}

.blogcalendar th {
    font-size:x-small;
    font-weight:bold;
    padding:2px;
    background-color:#f0f0f0;
}

.blogcalendar td {
    font-size:x-small;
    font-weight:normal;
}

.searchGroup { padding: 0 0 10px 0; background: #f0f0f0; }
.searchGroupHeading { font-size: 10px; font-weight: bold; color: #ffffff; background-color:
#3c78b5; padding: 2px 4px 1px 4px; }
.searchItem { padding: 1px 4px 1px 4px; }
.searchItemSelected { padding: 1px 4px 1px 4px; font-weight: bold; background: #ddd; }

/* permissions page styles */
.permissionHeading {
    border-bottom: #bbb; border-width: 0 0 1px 0; border-style: solid; font-size: 16px; text-align:
left;
}
.permissionTab {
    border-width: 0 0 0 1px; border-style: solid; background: #3c78b5; color: #ffffff; font-size:
10px;
}
.permissionSuperTab {
    border-width: 0 0 0 1px; border-style: solid; background: #003366; color: #ffffff;
}
.permissionCell {
    border-left: #bbb; border-width: 0 0 0 1px; border-style: solid;
}

/* warning panel */
.warningPanel { background: #FFFFCE; border:#F0C000 1px solid; padding: 8px; margin: 10px;
}
/* alert panel */
.alertPanel { background: #FFCCCC; border:#C00 1px solid; padding: 8px; margin: 10px; }
/* info panel */
.infoPanel { background: #D8E4F1; border:#3c78b5 1px solid; padding: 8px; margin: 10px; }

/* side menu highlighting (e.g. space content screen) */
.optionPadded { padding: 2px; }
.optionSelected { background-color: #ffffcc; padding: 2px; border: 1px solid #ddd; margin:
-1px; }
.optionSelected a { font-weight: bold; text-decoration: none; color: black; }

/* information macros */
.noteMacro { border-style: solid; border-width: 1px; border-color: #F0C000; background-color:
#FFFFCE; text-align:left; margin-top: 5px; margin-bottom: 5px}
.warningMacro { border-style: solid; border-width: 1px; border-color: #c00; background-color:
#fcc; text-align:left; margin-top: 5px; margin-bottom: 5px}
.infoMacro { border-style: solid; border-width: 1px; border-color: #3c78b5; background-color:
#D8E4F1; text-align:left; margin-top: 5px; margin-bottom: 5px}
.tipMacro { border-style: solid; border-width: 1px; border-color: #090; background-color:
#dfd; text-align:left; margin-top: 5px; margin-bottom: 5px}
.informationMacroPadding { padding: 5px 0 0 5px; }

table.infoMacro td, table.warningMacro td, table.tipMacro td, table.noteMacro td, table.sectionMacro
td {
    border: none;
}

table.sectionMacroWithBorder td.columnMacro { border-style: dashed; border-width: 1px; border-color:
#cccccc;}

.pagecontent
{
    padding: 10px;
    text-align: left;
}

/* styles for links in the top bar */
.topBarDiv a:link {color: #ffffff;}
.topBarDiv a:visited {color: #ffffff;}
.topBarDiv a:active {color: #ffffff;}
.topBarDiv a:hover {color: #ffffff;}
.topBarDiv {color: #ffffff;}

.topBar {
    background-color: #003366;
}


/* styles for extended operations */
.greyLinks a:link {color: #666666; text-decoration:underline;}
.greyLinks a:visited {color: #666666; text-decoration:underline;}
.greyLinks a:active {color: #666666; text-decoration:underline;}
.greyLinks a:hover {color: #666666; text-decoration:underline;}
.greyLinks {color: #666666; display:block; padding: 10px}

.logoSpaceLink {color: #999999; text-decoration: none}
.logoSpaceLink a:link {color: #999999; text-decoration: none}
.logoSpaceLink a:visited {color: #999999; text-decoration: none}
.logoSpaceLink a:active {color: #999999; text-decoration: none}
.logoSpaceLink a:hover {color: #003366; text-decoration: none}

/* basic panel (basicpanel.vmd) style */
.basicPanelContainer {border: 1px solid #3c78b5; margin-top: 2px; margin-bottom: 8px; width:
100%}
.basicPanelTitle {padding: 5px; margin: 0px; background-color: #f0f0f0; color: black; font-weight:
bold;}
.basicPanelBody {padding: 5px; margin: 0px}

.separatorLinks a:link {color: white}
.separatorLinks a:visited {color: white}
.separatorLinks a:active {color: white}

.greynavbar {background-color: #f0f0f0; border-top: 1px solid #3c78b5; margin-top: 2px}

div.headerField {
    float: left;
    width: auto;
    height: 100%;
}

.headerFloat {
    margin-left: auto;
    width: 50%;
}

.headerFloatLeft {
    float: left;
    margin-right: 20px;
    margin-bottom: 10px;
}

#headerRow {
    padding: 10px;
}

div.license-personal {
   background-color: #003366;
   color: #ffffff;
}

div.license-personal a {
   color: #ffffff;
}

.greyFormBox {
    border: 1px solid #cccccc;
    padding: 5px;
}

/* IE automatically adds a margin before and after form tags. Use this style to remove that
*/
.marginlessForm {
    margin: 0px;
}

.openPageHighlight {
    background-color: #ffffcc;
    padding: 2px;
    border: 1px solid #ddd;
}

.editPageInsertLinks, .editPageInsertLinks a
{
    color: #666666;
    font-weight: bold;
    font-size: 10px;
}

/* Style for label heatmap. */
.top10 a {
    font-weight: bold;
    font-size: 2em;
    color: #003366;
}
.top25 a {
    font-weight: bold;
    font-size: 1.6em;
    color: #003366;
}
.top50 a {
    font-size: 1.4em;
    color: #003366;
}
.top100 a {
    font-size: 1.2em;
    color: #003366;
}

.heatmap {
    list-style:none;
    width: 95%;
    margin: 0px auto;
}

.heatmap a {
    text-decoration:none;
}

.heatmap a:hover {
    text-decoration:underline;
}

.heatmap li {
    display: inline;
}

.minitab {
padding: 3px 0px 3px 8px;
margin-left: 0;
margin-top: 1px;
margin-bottom: 0px;
border-bottom: 1px solid #3c78b5;
font: bold 9px Verdana, sans-serif;
text-decoration: none;
float:none;
}
.selectedminitab {
padding: 3px 0.5em;
margin-left: 3px;
margin-top: 1px;
border: 1px solid #3c78b5;
background: white;
border-bottom: 1px solid white;
color: #000000;
text-decoration: none;
}
.unselectedminitab {
padding: 3px 0.5em;
margin-left: 3px;
margin-top: 1px;
border: 1px solid #3c78b5;
border-bottom: none;
background: #3c78b5;
color: #ffffff;
text-decoration: none;
}

a.unselectedminitab:hover {
color: #ffffff;
background: #003366;
border-color: #003366;
}

a.unselectedminitab:link { color: white; }
a.unselectedminitab:visited { color: white; }

a.selectedminitab:link { color: black; }
a.selectedminitab:visited { color: black; }

.linkerror { background-color: #fcc;}

a.labelOperationLink:link {text-decoration: underline}
a.labelOperationLink:active {text-decoration: underline}
a.labelOperationLink:visited {text-decoration: underline}
a.labelOperationLink:hover {text-decoration: underline}

a.newLabel:link {background-color: #ddffdd}
a.newLabel:active {background-color: #ddffdd}
a.newLabel:visited {background-color: #ddffdd}
a.newLabel:hover {background-color: #ddffdd}

ul.square {list-style-type: square}

.inline-control-link {
    background: #ffc;
    font-size: 9px;
    color: #666;
    padding: 2px;
    text-transform: uppercase;
    text-decoration: none;
}


.inline-control-link a:link {text-decoration: none}
.inline-control-link a:active {text-decoration: none}
.inline-control-link a:visited {text-decoration: none}
.inline-control-link a:hover {text-decoration: none}

.inline-control-link {
    background: #ffc;
    font-size: 9px;
    color: #666;
    padding: 2px;
    text-transform: uppercase;
    text-decoration: none;
    cursor: pointer;
}

div.auto_complete {
    width: 350px;
    background: #fff;
}
div.auto_complete ul {
    border: 1px solid #888;
    margin: 0;
    padding: 0;
    width: 100%;
    list-style-type: none;
}
div.auto_complete ul li {
    margin: 0;
    padding: 3px;
}
div.auto_complete ul li.selected {
    background-color: #ffb;
}
div.auto_complete ul strong.highlight {
    color: #800;
    margin: 0;
    padding: 0;
}

/******* Edit Page Styles *******/
.toogleFormDiv{
    border:1px solid #A7A6AA;
    background-color:white;
    padding:5px;
    margin-top: 5px;
}

.toogleInfoDiv{
    border:1px solid #A7A6AA;
    background-color:white;
    display:none;
    padding:5px;
    margin-top: 10px;
}

.inputSection{
    margin-bottom:20px;
}

#editBox{
   border:1px solid lightgray;
   background-color:#F0F0F0;
}

/******* Left Navigation Theme Styles ********/
.leftnav li a {
    text-decoration:none;
    color:white;
    margin:0px;
    display:block;
    padding:2px;
    padding-left:5px;
    background-color: #3c78b5;
    border-top:1px solid #3c78b5;
}

.leftnav li a:active {color:white;}
.leftnav li a:visited {color:white;}
.leftnav li a:hover {background-color: #003366; color:white;}

/* Added by Shaun during i18n */
.replaced
{
    background-color: #33CC66;
}

.topPadding
{
    margin-top: 20px;
}

/* new form style */
.form-block {
    padding: 6px;
}
.form-error-block {
    padding: 6px;
    background: #fcc;
    border-top: #f0f0f0 1px solid;
    border-bottom: #f0f0f0 1px solid;
    margin-bottom: 6px;
    padding: 0 12px 0 12px;
}
.form-element-large {
    font-size: 16px;
    font-weight: bold;
    font-family: Arial, sans-serif;
    color: #003366;
}

.form-element-small {
    font-size: 12px;
    font-weight: bold;
    font-family: Arial, sans-serif;
    color: #003366;
}

.form-header {
    background: lightyellow;
    border-top: #f0f0f0 1px solid;
    border-bottom: #f0f0f0 1px solid;
    margin-bottom: 6px;
    padding: 0 12px 0 12px;
}
.form-header p, .form-block p, .form-error-block p {
    line-height: normal;
    margin: 12px 0 12px 0;
}
.form-example {
    color: #888;
    font-size: 11px;
}
.form-divider {
    border-bottom: #ccc 1px solid;
    margin-bottom: 6px;
}
.form-buttons {
    margin-top: 6px;
    border-top: #ccc 1px solid;
    border-bottom: #ccc 1px solid;
    background: #f0f0f0;
    padding: 10px;
    text-align: center;
}
.form-buttons input {
    width: 100px;
}
.form-block .error {
    padding: 6px;
    margin-bottom: 6px;
}
    -->
    </style>
</head>
<body>

<div id="PageContent">
<table class="pagecontent" border="0" cellpadding="0" cellspacing="0" width="100%"><tr>
<td valign="top" class="pagebody">

    <div class="pageheader">
        <span class="pagetitle">
            Page Edited :
            <a href="http://cwiki.apache.org/confluence/display/SLING">SLING</a>
:
            <a href="http://cwiki.apache.org/confluence/display/SLING/Everything+is+a+Resource">Everything
is a Resource</a>
        </span>
    </div>

     <p>
        <a href="http://cwiki.apache.org/confluence/display/SLING/Everything+is+a+Resource">Everything
is a Resource</a>
        has been edited by             <a href="http://cwiki.apache.org/confluence/display/~fmeschbe">Felix
Meschberger</a>
            <span class="smallfont">(Dec 22, 2007)</span>.
     </p>
    
     <p>
                 <a href="http://cwiki.apache.org/confluence/pages/diffpagesbyversion.action?pageId=73171&originalVersion=2&revisedVersion=3">(View
changes)</a>
     </p>

    <span class="label">Content:</span><br/>
    <div class="greybox wiki-content"><h1><a name="EverythingisaResource-IntroducingtheSlingParadigm%3AEverythingisaResource"></a>Introducing
the Sling Paradigm: Everything is a Resource</h1>

<p>Status: DRAFT, work in progress<br/>
Created: 22. December 2007<br/>
Author: fmeschbe</p>

<div>
<ul>
  <li><a href='#EverythingisaResource-1CurrentState'>1 Current State</a></li>
  <li><a href='#EverythingisaResource-2EntertheSlingParadigm'>2 Enter the Sling
Paradigm</a></li>
  <li><a href='#EverythingisaResource-3ImplementingtheSlingParadigm'>3 Implementing
the Sling Paradigm</a>
<ul>
  <li><a href='#EverythingisaResource-3.1ResourceProvisioning'>3.1 Resource Provisioning</a></li>
  <li><a href='#EverythingisaResource-3.2Adapters'>3.2 Adapters</a></li>
  <li><a href='#EverythingisaResource-3.3ChangeEvents'>3.3 Change Events</a></li>
</ul></li>
  <li><a href='#EverythingisaResource-4EmployingtheSlingParadigm'>4 Employing
the Sling Paradigm</a>
<ul>
  <li><a href='#EverythingisaResource-4.1ScriptsinBundles'>4.1 Scripts in Bundles</a></li>
  <li><a href='#EverythingisaResource-4.2Servlets'>4.2 Servlets</a></li>
  <li><a href='#EverythingisaResource-4.3Filters'>4.3 Filters</a></li>
</ul></li>
  <li><a href='#EverythingisaResource-5ChangestotheCode'>5 Changes to the Code</a>
<ul>
  <li><a href='#EverythingisaResource-5.1SlingAPI'>5.1 Sling API</a></li>
  <li><a href='#EverythingisaResource-5.2OSGiCommons'>5.2 OSGi Commons</a></li>
  <li><a href='#EverythingisaResource-5.3Merge%7B%7Bscripting%2Fresolver%7D%7Dinto%7B%7Bsling%2Fservletresolver%7D%7D'>5.3
Merge <tt>scripting/resolver</tt> into <tt>sling/servlet-resolver</tt></a></li>
</ul></li>
</ul></div>


<h2><a name="EverythingisaResource-1CurrentState"></a>1 Current State</h2>

<p>Currently Sling uses resources, servlets and scripts as follows:</p>

<ul>
	<li>The <tt>Resource</tt> interface is mainly used to abstract JCR <tt>Node</tt>
instances</li>
	<li>The <tt>ServletResolver</tt> uses an internal registration of servlets
registered as OSGi services with the interface <tt>javax.servlet.Servlet</tt>
and selects the servlet based on the resource type of the <tt>Resource</tt> of
the request only.</li>
	<li>The <tt>ScriptResolver</tt> uses the <tt>ResourceResolver</tt>
to find request handling scripts based on the resource type of the <tt>Resource</tt>
of the request, the request selector string and the request method or request extension.</li>
	<li>Request processing filters are based on OSGi services registered with the interface
name <tt>javax.servlet.Filter</tt></li>
	<li>Error handling is implemented in the <tt>ServletResolver</tt> implementation
using the same mechanism to find a servlet (or script) based on the response status code or
the caught <tt>Throwable</tt> as the pseudo request method name and using a different
default error handling servlet.</li>
</ul>


<p>This mechanism works rather good, but there are currently enhancement requests, which
may not easily be implemented with the current concepts:</p>

<ul>
	<li>Allow scripting of request processing filters. Implementing this requires special
filter wrappers, which may select filter scripts.</li>
	<li>Enhance servlet selection to include the same parameters as script resolution,
namely the request selector string and the request method or request extension. Implementing
this would require replicating much of the code of the current <tt>ScriptResolver</tt>
implementation.</li>
</ul>



<h2><a name="EverythingisaResource-2EntertheSlingParadigm"></a>2 Enter the
Sling Paradigm</h2>

<p>To overcome the limitations we introduce the Sling paradigm</p>

<div class="panel"><div class="panelContent">
<p>Everything is a Resource</p>
</div></div>

<p>The Sling paradigm brings the paradigm of Java Content Repository API (JCR) <em>Everything
is Content</em> to Sling.</p>

<p>This means, that every script, servlet, filter, error handler, etc. is available
from the <tt>ResourceResolver</tt> just like normal content providing data to
be rendered upon requests. To enable this resource resolution and resources have to provide
certain functionality:</p>

<ul>
	<li>Allow registration of resources with the resource resolver. This is required to
access servlets and filters registered as OSGi services through the resource resolver.</li>
	<li>Provide eventing mechanism to support caching and cache management</li>
	<li>Extend resource adapter mechanism, that is to provide extension to the <tt>Resource.adaptTo(Class&lt;?&gt;)</tt>
method</li>
	<li>Extend resource enumeration to include resources from various sources</li>
</ul>




<h2><a name="EverythingisaResource-3ImplementingtheSlingParadigm"></a>3
Implementing the Sling Paradigm</h2>

<h3><a name="EverythingisaResource-3.1ResourceProvisioning"></a>3.1 Resource
Provisioning</h3>

<p>To be able to access resources from different locations through a single resource
resolver, a new <tt>ResourceProvider</tt> interface is added. A resource provider
is able to provide resources below a certain location in the (virtual) resource tree. The
resource resolver selects a resource provider to ask for a resource looking for a longest
match amongst the root paths of the providers. If the longest match resource provider cannot
find the requested resource, the provider with the second longest match is asked, and so forth.</p>

<p>Accessing the JCR repository is also implemented in the form of a resource provider.
This JCR resource provider is registered at the root &#8211; <tt>/</tt> &#8211;
of the (virtual) resource tree. Thus the JCR repository is always asked if, no more specific
resource provider has the requested resource.</p>

<p>The <tt>ResourceProvider</tt> interface is defined as follows:</p>

<div class="code"><div class="codeContent">
<pre class="code-java"><span class="code-keyword">package</span> org.apache.sling.api.resource;

<span class="code-keyword">public</span> class ResourceProvider {

    /**
     * The name of the service registration property containing the root paths
     * of the resources provided by <span class="code-keyword">this</span> provider
(value is <span class="code-quote">"provider.roots"</span>).
     */
    <span class="code-keyword">static</span> <span class="code-keyword">final</span>
<span class="code-object">String</span> ROOTS = <span class="code-quote">"provider.roots"</span>;

    /**
     * Returns a resource from <span class="code-keyword">this</span> resource
provider or &lt;code&gt;<span class="code-keyword">null</span>&lt;/code&gt;
<span class="code-keyword">if</span>
     * the resource provider cannot find it. The path should have one of the
     * {@link #getRoots()} strings as its prefix.
     *
     * @<span class="code-keyword">throws</span> Exception may be thrown in <span
class="code-keyword">case</span> of any problem creating the
     *             &lt;code&gt;Resource&lt;/code&gt; instance.
     */
    Resource getResource(ResourceResolver ResourceResolver, <span class="code-object">String</span>
path)
            <span class="code-keyword">throws</span> Exception;

}</pre>
</div></div>

<p>Resource providers are registered as OSGi services under the name <tt>org.apache.sling.api.resource.ResourceProvider</tt>
providing the list of resource path roots as a service registration property with the name
<tt>provider.roots</tt>.</p>


<h3><a name="EverythingisaResource-3.2Adapters"></a>3.2 Adapters</h3>

<p>The <tt>Resource</tt> and <tt>ResourceResolver</tt> interfaces
are defined with a method <tt>adaptTo</tt>, which adapts the object to other classes.
Using this mechanism the JCR session of the resource resolver calling the <tt>adaptTo</tt>
method with the <tt>javax.jcr.Session</tt> class object. Likewise the node on
which a resource is based can be retrieved by calling the <tt>Resource.adaptTo</tt>
method with the <tt>javax.jcr.Node</tt> class object.</p>

<p>To use resources as scripts, the <tt>Resource.adaptTo</tt> method must
support being called with the <tt>org.apache.sling.api.script.SlingScript</tt>
class object. But of course, we do not want to integrate the script manager with the resource
resolver. To enable adapting objects to classes which are not foreseen by the original implementation,
a factory mechanism is used. This way, the script manager can provide an adapter factory to
adapt <tt>Resource</tt> to <tt>SlingScript</tt> objects.</p>


<h3><a name="EverythingisaResource-3.3ChangeEvents"></a>3.3 Change Events</h3>

<p>The Sling <tt>ResourceResolver</tt> implementation defines events to
be fired on changes in the (virtual) resource tree:</p>

<ul>
	<li>All repository events are forwarded</li>
	<li>Resource provider addition and removal events are generated</li>
</ul>


<p>Events are transmitted using the OSGi EventTracker specification. That is interested
parties must register as OSGi event listener services.</p>


<h2><a name="EverythingisaResource-4EmployingtheSlingParadigm"></a>4 Employing
the Sling Paradigm</h2>

<h3><a name="EverythingisaResource-4.1ScriptsinBundles"></a>4.1 Scripts
in Bundles</h3>
<h3><a name="EverythingisaResource-4.2Servlets"></a>4.2 Servlets</h3>
<h3><a name="EverythingisaResource-4.3Filters"></a>4.3 Filters</h3>



<h2><a name="EverythingisaResource-5ChangestotheCode"></a>5 Changes to the
Code</h2>


<h3><a name="EverythingisaResource-5.1SlingAPI"></a>5.1 Sling API</h3>

<ol>
	<li>Add <tt>org.apache.sling.api.adapter.Adaptable</tt> interface</li>
	<li><tt>Resource</tt> and <tt>RespourceResolver</tt> interfaces
extend the <tt>Adaptable</tt> interface</li>
	<li>Add <tt>org.apache.sling.api.resource.ResourceProvider</tt> interface</li>
	<li>Merge <tt>SlingScriptResolver</tt> and <tt>ServletResolver</tt></li>
</ol>



<h3><a name="EverythingisaResource-5.2OSGiCommons"></a>5.2 OSGi Commons</h3>

<p>The <tt>org.apache.sling.osgi.commons</tt> bundle is a new project providing
the following functionality:</p>

<ul>
	<li><tt>ServiceLocator</tt> implementation (moved from <tt>sling/core</tt>
project</li>
	<li><tt>SlingAdaptable</tt> class implementing <tt>Adaptable</tt>
and leveraging adapter factories</li>
	<li><tt>AdapterFactory</tt> interface</li>
	<li><tt>AdapterManager</tt> selecting <tt>AdapterFactory</tt>
instances on behalf of <tt>SlingAdaptable</tt> objects</li>
</ul>



<h3><a name="EverythingisaResource-5.3Merge%7B%7Bscripting%2Fresolver%7D%7Dinto%7B%7Bsling%2Fservletresolver%7D%7D"></a>5.3
Merge <tt>scripting/resolver</tt> into <tt>sling/servlet-resolver</tt></h3>

<p>The <tt>SlingScriptResolver</tt> and  <tt>ServletResolver</tt>
interfaces are merged into a single <tt>ServletResolver</tt> interface, which
has a <tt>resolve(SlingHttpServletRequest)</tt> and a <tt>find(ResourceResolver,
String relPath)</tt> method. The implementation of this method will apply the alogirthm
of the current <tt>scripting/resolver</tt> implementation of the <tt>SlingScriptResolver</tt>.</p>

<p>Any script (or servlet or actually code) may call any script or servlet by just resolving
the script or servlet to a <tt>Resource</tt> and adapting the resource found to
a <tt>SlingScript</tt> or <tt>Servlet</tt>.</p></div>


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