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From conflue...@apache.org
Subject [CONF] Apache CXF Documentation: JAX-RS (JSR-311) (page edited)
Date Tue, 01 Jul 2008 20:48:00 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/CXF20DOC">CXF20DOC</a> :
            <a href="http://cwiki.apache.org/confluence/display/CXF20DOC/JAX-RS+%28JSR-311%29">JAX-RS (JSR-311)</a>
        </span>
    </div>

     <p>
        <a href="http://cwiki.apache.org/confluence/display/CXF20DOC/JAX-RS+%28JSR-311%29">JAX-RS (JSR-311)</a>
        has been edited by             <a href="http://cwiki.apache.org/confluence/display/~sergey_beryozkin">Sergey Beryozkin</a>
            <span class="smallfont">(Jul 01, 2008)</span>.
     </p>
    
     <p>
                 <a href="http://cwiki.apache.org/confluence/pages/diffpagesbyversion.action?pageId=70366&originalVersion=25&revisedVersion=26">(View changes)</a>
     </p>

    <span class="label">Content:</span><br/>
    <div class="greybox wiki-content"><p>CXF has an initial implementation of JAX-RS (JSR-311): Java API for RESTfulWeb Services. JAX-RS provides a more standard way to build RESTful services in Java. <span class="nobr"><a href="https://jsr311.dev.java.net/nonav/releases/0.8/index.html" title="Visit page outside Confluence" rel="nofollow">0.8 version of JSR-311 API <sup><img class="rendericon" src="/confluence/images/icons/linkext7.gif" height="7" width="7" align="absmiddle" alt="" border="0"/></sup></a></span> is currently supported.</p>

<p>JAX-RS related demos are located under samples\jax_rs directory (CXF 2.1 only).</p>

<h1><a name="JAX-RS%28JSR-311%29-Understandingthebasics"></a>Understanding the basics</h1>

<p>You are encouraged to read <span class="nobr"><a href="http://jcp.org/en/jsr/detail?id=311" title="Visit page outside Confluence" rel="nofollow">JAX-RS spec <sup><img class="rendericon" src="/confluence/images/icons/linkext7.gif" height="7" width="7" align="absmiddle" alt="" border="0"/></sup></a></span> to find out information not covered by this documentation.</p>

<h2><a name="JAX-RS%28JSR-311%29-Resourceclass"></a>Resource class</h2>

<p>A resource class is a Java class annotated with JAX-RS annotations to represent a Web resource. A typical resource class in JAX-RS looks like this below:</p>
<div class="code"><div class="codeContent">
<pre class="code-java"><span class="code-keyword">package</span> demo.jaxrs.server;

<span class="code-keyword">import</span> java.util.HashMap;
<span class="code-keyword">import</span> java.util.Map;

<span class="code-keyword">import</span> javax.ws.rs.GET;
<span class="code-keyword">import</span> javax.ws.rs.ProduceMime;
<span class="code-keyword">import</span> javax.ws.rs.Path;
<span class="code-keyword">import</span> javax.ws.rs.PathParam;
<span class="code-keyword">import</span> javax.ws.rs.core.Context;
<span class="code-keyword">import</span> javax.ws.rs.core.Response;
<span class="code-keyword">import</span> javax.ws.rs.core.UriInfo;

@Path(<span class="code-quote">"/customerservice/"</span>)
@ProduceMime(<span class="code-quote">"application/xml"</span>)
<span class="code-keyword">public</span> class CustomerService {

    <span class="code-keyword">public</span> CustomerService() {
    }

    @GET
    <span class="code-keyword">public</span> Customers getCustomers() {
        ......
    }

    @GET
    @Path(<span class="code-quote">"/customers/{id}"</span>)
    @ProduceMime(<span class="code-quote">"application/json"</span>)
    <span class="code-keyword">public</span> Customer getCustomer(@PathParam(<span class="code-quote">"id"</span>) <span class="code-object">String</span> id) {
        ......
    }

    @PUT
    @Path(<span class="code-quote">"/customers/{id}"</span>)
    @ConsumeMime(<span class="code-quote">"application/xml"</span>)
    <span class="code-keyword">public</span> Response updateCustomer(@PathParam(<span class="code-quote">"id"</span>) <span class="code-object">Long</span> id, Customer customer) {
        ......
    }

    @POST
    @Path(<span class="code-quote">"/customers"</span>)
    <span class="code-keyword">public</span> Response addCustomer(Customer customer) {
        ......
    }

    @DELETE
    @Path(<span class="code-quote">"/customers/{id}/"</span>)
    <span class="code-keyword">public</span> Response deleteCustomer(@PathParam(<span class="code-quote">"id"</span>) <span class="code-object">String</span> id) {
        ......
    }

    @Path(<span class="code-quote">"/orders/{orderId}/"</span>)
    <span class="code-keyword">public</span> Order getOrder(@PathParam(<span class="code-quote">"orderId"</span>) <span class="code-object">String</span> orderId) {
       ......
    }
}</pre>
</div></div>

<p>Customer resource class can handle requests starting from /customerservice. When /customerservice request is matched to this class, its getCustomers() method will be selected. updateCustomer(), deleteCustomer() and addCustomer() are used to serve POST, PUT and DELETE requests starting from /customerservice/customer, while getOrder() method delegates the handling of requests like /customerservice/orders/1 to a subresource locator Order.</p>

<p>ProduceMime annotation is used to specify the format of the response. When not available on the method, it's inherited from a class, and if it's not available on the class then it's inherited from a corresponding message body writer, if any. Default value is &#42;/&#42;, but it's recommended that some definite value is specified. The same applies to ConsumeMime, only it's message body readers that are checked as the last resort.</p>

<p>For example, getCustomers() method inherits the ProduceMime annotation from its class, while getCustomer() method overrides it with its own value.  </p>

<h2><a name="JAX-RS%28JSR-311%29-@Path"></a>@Path</h2>

<p>@Path annotation is applied to resource classes or methods. The value of @Path annotation is a relative URI path and follows the URI Template format. </p>

<p>More information about Path annotations can be found from <span class="nobr"><a href="http://jcp.org/en/jsr/detail?id=311" title="Visit page outside Confluence" rel="nofollow">JAX-RS spec <sup><img class="rendericon" src="/confluence/images/icons/linkext7.gif" height="7" width="7" align="absmiddle" alt="" border="0"/></sup></a></span> section 2.3. </p>

<h2><a name="JAX-RS%28JSR-311%29-HTTPMethod"></a>HTTP Method</h2>

<p>JAX-RS specification defines a number of annotations such as @GET, @PUT, @POST and @DELETE. Using an @HttpMethod designator, one can create a custom annotation such as @Update or @Patch</p>

<h2><a name="JAX-RS%28JSR-311%29-Returntypes"></a>Return types</h2>

<p>Either javax.ws.rs.core.Response or custom type can be returned. javax.ws.rs.core.Response can be used to set the HTTP response code, headers and entity. </p>

<h3><a name="JAX-RS%28JSR-311%29-Exceptionhandling"></a>Exception handling</h3>

<p>One can either throw an unchecked WebApplicationException or return Response with a proper error code set.<br/>
The former option may be a better option when no JAX-RS types can be added to method signatures.</p>

<p>For example :</p>

<div class="code"><div class="codeContent">
<pre class="code-java">@Path(<span class="code-quote">"/customerservice/"</span>)
<span class="code-keyword">public</span> class CustomerService {

    
    @PUT
    @Path(<span class="code-quote">"/customers/{id}"</span>)
    <span class="code-keyword">public</span> Response updateCustomer(@PathParam(<span class="code-quote">"id"</span>) <span class="code-object">Long</span> id, Customer customer) {
        <span class="code-keyword">return</span> Response.status(errorCode).build();
    }

    @POST
    @Path(<span class="code-quote">"/customers"</span>)
    <span class="code-keyword">public</span> Customer addCustomer(Customer customer) {
        <span class="code-keyword">throw</span> <span class="code-keyword">new</span> WebApplicationException(errorCode);
    }

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

<p>Yet another option is to register an ExceptionMapper provider. Ex :</p>

<div class="code"><div class="codeContent">
<pre class="code-java"><span class="code-keyword">public</span> BookExceptionMapper <span class="code-keyword">implements</span> ExceptionMapper&lt;BookException&gt; {
    <span class="code-keyword">public</span> Response toResponse(BookException ex) {
        <span class="code-comment">// convert to Response
</span>    }
}</pre>
</div></div>

<p>This allows to throw exceptions from an application code and deal with the proper mappping to an HTTP response in a registered provider.</p>

<h2><a name="JAX-RS%28JSR-311%29-DealingwithParameters"></a>Dealing with Parameters</h2>

<p>PathParam annotation is used to map a given Path template variable to a method parameter.<br/>
For example :</p>

<div class="code"><div class="codeContent">
<pre class="code-java">@Path(<span class="code-quote">"/customer/{id}"</span>)
<span class="code-keyword">public</span> class CustomerService {

    
    @PUT
    @Path(<span class="code-quote">"{name}"</span>)
    <span class="code-keyword">public</span> Response updateCustomer(@PathParam(<span class="code-quote">"id"</span>) <span class="code-object">Long</span> id, @PathParam(<span class="code-quote">"name"</span>) <span class="code-object">String</span> name) {
        ...
    }
}</pre>
</div></div>

<p>In this case a template variable id available from a root class annotation is mapped to a parameter of type Long, while a name variable is mapped to a parameter of type String.<br/>
Paramaters can be of type String or of any type that have constructors accepting a String argument or static valueOf(String s) methods. JAX-RS PathSegment is also supported.</p>

<p>QueryParam, HttpHeader and CookieParam annotations are also supported.</p>

<h2><a name="JAX-RS%28JSR-311%29-Contextannotations"></a>Context annotations</h2>

<p>If a parameter or field of either UriInfo or HttpHeaders or SecurityContext or one of the Servlet types like ServeltContext or MessageBodyWorkers is annotated with a Context annotation then CXF will provide properly initialized instances to the application code.</p>

<p>Note that if fields are annotated with Context then care should be taken for singleton resource classes as CXF does not support yet a thread-local injection of Context fields. </p>

<p>Injection of contexts into message body providers is not supported yet.</p>

<p>Example :</p>

<div class="code"><div class="codeContent">
<pre class="code-java">@Path(<span class="code-quote">"/customer"</span>)
<span class="code-keyword">public</span> class CustomerService {
    
    @Context ServletContext sc;
    @Context SecurityContext sc;
    
    @PUT
    <span class="code-keyword">public</span> Response updateCustomer(@Context UriInfo u, @Context HttpHeader h, Customer c) {
        ...
    }
}</pre>
</div></div>

<h2><a name="JAX-RS%28JSR-311%29-Annotationinheritance"></a>Annotation inheritance</h2>

<p>Most of the JAX-RS annotations can be inherited from either an interface or a superclass. JAX-RS specification requires that only the ones applied to methods can be inherited. For example :</p>

<div class="code"><div class="codeContent">
<pre class="code-java"><span class="code-keyword">public</span> <span class="code-keyword">interface</span> CustomerService {

    @PUT
    @Path(<span class="code-quote">"/customers/{id}"</span>)
    Response updateCustomer(@PathParam(<span class="code-quote">"id"</span>) <span class="code-object">Long</span> id, Customer customer) {
        <span class="code-keyword">return</span> Response.status(errorCode).build();
    }

    @POST
    @Path(<span class="code-quote">"/customers"</span>)
    Customer addCustomer(Customer customer) {
        <span class="code-keyword">throw</span> <span class="code-keyword">new</span> WebApplicationException(errorCode);
    }

}

@Path(<span class="code-quote">"/customerservice/"</span>)
<span class="code-keyword">public</span> class Customers <span class="code-keyword">implements</span> CustomerService {

    
    <span class="code-keyword">public</span> Response updateCustomer(<span class="code-object">Long</span> id, Customer customer) {
        <span class="code-keyword">return</span> Response.status(errorCode).build();
    }

    <span class="code-keyword">public</span> Customer addCustomer(Customer customer) {
        <span class="code-keyword">throw</span> <span class="code-keyword">new</span> WebApplicationException(errorCode);
    }

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

<p>Similarly, annotations can be inherited from super-classes. <br/>
The resource class can also inherit the class-level annotations from either one of implemented interfaces or its subclass.    </p>


<h2><a name="JAX-RS%28JSR-311%29-Subresourcelocators."></a>Sub-resource locators.</h2>

<p>A method of a resource class that is annotated with @Path becomes a sub-resource locator when an annotation with an HttpMethod designator like @GET is not present. Sub-resource locators are used to further resolve the object that will handle the request. They can delegate to other sub-resource locators. </p>

<p>In the example below, getOrder method is a sub-resource locator:</p>
<div class="code"><div class="codeContent">
<pre class="code-java">@Path(<span class="code-quote">"/customerservice/"</span>)
<span class="code-keyword">public</span> class CustomerService {

    @Path(<span class="code-quote">"/orders/{orderId}/"</span>)
    <span class="code-keyword">public</span> Order getOrder(@PathParam(<span class="code-quote">"orderId"</span>) <span class="code-object">String</span> orderId) {
       ......
    }
}

@XmlRootElement(name = <span class="code-quote">"Order"</span>)
<span class="code-keyword">public</span> class Order {
    <span class="code-keyword">private</span> <span class="code-object">long</span> id;

    <span class="code-keyword">public</span> Order() {
    }

    <span class="code-keyword">public</span> <span class="code-object">long</span> getId() {
        <span class="code-keyword">return</span> id;
    }


    @GET
    @Path(<span class="code-quote">"products/{productId}/"</span>)
    <span class="code-keyword">public</span> Product getProduct(@PathParam(<span class="code-quote">"productId"</span>)<span class="code-object">int</span> productId) {
       ......
    }
}</pre>
</div></div>
<p>A HTTP GET request to <span class="nobr"><a href="http://localhost:9000/customerservice/orders/223/products/323" title="Visit page outside Confluence" rel="nofollow">http://localhost:9000/customerservice/orders/223/products/323<sup><img class="rendericon" src="/confluence/images/icons/linkext7.gif" height="7" width="7" align="absmiddle" alt="" border="0"/></sup></a></span> is dispatched to getOrder method first. If the Order resource whose id is 223 is found, the Order 223 will be used to further resolve Product resource. Eventually, a Product 323 that belongs to Order 223 is returned.</p>

<p>Note that a given subresource can be represented as an interface and resolved to an actual class at runtime. In this case any resource methods which have to be invoked on a subresource have to be inherited from a given interface :  </p>

<div class="code"><div class="codeContent">
<pre class="code-java">@Path(<span class="code-quote">"/customerservice/"</span>)
<span class="code-keyword">public</span> class CustomerService {

    @Path(<span class="code-quote">"/orders/{orderId}/"</span>)
    <span class="code-keyword">public</span> Order getOrder(@PathParam(<span class="code-quote">"orderId"</span>) <span class="code-object">String</span> orderId) {
       ......
    }
}

<span class="code-keyword">public</span> <span class="code-keyword">interface</span> Order {
    @GET
    @Path(<span class="code-quote">"products/{productId}/"</span>)
    Product getProduct(@PathParam(<span class="code-quote">"productId"</span>)<span class="code-object">int</span> productId);
}

@XmlRootElement(name = <span class="code-quote">"Order"</span>)
<span class="code-keyword">public</span> class OrderImpl <span class="code-keyword">implements</span> Order {
    
    @GET
    @Path(<span class="code-quote">"products/{productId}/"</span>)
    <span class="code-keyword">public</span> Product getProduct(@PathParam(<span class="code-quote">"productId"</span>)<span class="code-object">int</span> productId) {
       ......
    }
}</pre>
</div></div>


<h2><a name="JAX-RS%28JSR-311%29-MessageBodyProviders"></a>Message Body Providers</h2>

<p>JAX-RS relies on MessageBodyReader and MessageBodyWriter implementations to serialize and de-serialize Java types. JAX-RS requires that certain types has to be supported out of the box. <br/>
By default, CXF supports String, byte[], InputStream, File, JAXP Source, JAXB-annotated types with application/xml and application/json formats (see below). JAX-RS MultivaluedMap is also supported for<br/>
form contents. Support for other types like Reader and StreamingOutput is on the way.</p>


<h2><a name="JAX-RS%28JSR-311%29-CustomMessageBodyProviders"></a>Custom Message Body Providers          </h2>

<p>It's likely that a given application may need to deal with types which are not supported by default.<br/>
Alternatively, developers may want to provide a more efficient support for handling default types such as InputStream.</p>

<p>Here's an example of a custom MessageBodyReader for InputStream :</p>

<div class="code"><div class="codeContent">
<pre class="code-java">@ConsumeMime(<span class="code-quote">"application/octet-stream"</span>)
@Provider
<span class="code-keyword">public</span> class InputStreamProvider <span class="code-keyword">implements</span> MessageBodyReader&lt;InputStream&gt; {

    
    <span class="code-keyword">public</span> <span class="code-object">boolean</span> isReadable(<span class="code-object">Class</span>&lt;InputStream&gt; type, Type genericType, Annotation[] annotations) {
        <span class="code-keyword">return</span> InputStream.class.isAssignableFrom(type);
    }

    <span class="code-keyword">public</span> InputStream readFrom(<span class="code-object">Class</span>&lt;InputStream&gt; clazz, Type t, Annotation[] a, MediaType mt, 
                         MultivaluedMap&lt;<span class="code-object">String</span>, <span class="code-object">String</span>&gt; headers, InputStream is) 
        <span class="code-keyword">throws</span> IOException {
        <span class="code-keyword">return</span> <span class="code-keyword">new</span> FilterInputStream(is) {
             @Override
             <span class="code-keyword">public</span> <span class="code-object">int</span> read(<span class="code-object">byte</span>[] b) <span class="code-keyword">throws</span> IOException {
                 <span class="code-comment">// filter out some bytes
</span>             }              
        }     
    }
}</pre>
</div></div>

<p>and here's an example of a custom MessageBodyWriter for Long :</p>

<div class="code"><div class="codeContent">
<pre class="code-java">@ProduceMime(<span class="code-quote">"text/plain"</span>)
@Provider
<span class="code-keyword">public</span> class LongProvider <span class="code-keyword">implements</span> MessageBodyWriter&lt;<span class="code-object">Long</span>&gt; {

    <span class="code-keyword">public</span> <span class="code-object">long</span> getSize(<span class="code-object">Long</span> l) {
        <span class="code-keyword">return</span> -1;
    }

    <span class="code-keyword">public</span> <span class="code-object">boolean</span> isWriteable(<span class="code-object">Class</span>&lt;?&gt; type, Type genericType, Annotation[] annotations) {
        <span class="code-keyword">return</span> <span class="code-object">long</span>.class.isAssignableFrom(type) || <span class="code-object">Long</span>.class.isAssignableFrom(type);
    }

    <span class="code-keyword">public</span> void writeTo(<span class="code-object">Long</span> l, <span class="code-object">Class</span>&lt;?&gt; clazz, Type type, Annotation[] a, 
                        MediaType mt, MultivaluedMap&lt;<span class="code-object">String</span>, <span class="code-object">Object</span>&gt; headers, OutputStream os) 
        <span class="code-keyword">throws</span> IOException {
        os.write(l.toString().getBytes());
        
    }</pre>
</div></div>

<h3><a name="JAX-RS%28JSR-311%29-Registeringcustomproviders"></a>Registering custom providers  </h3>


<p>Putting @Provider annotation on the provider class is something that should lead to your provider being registered with the runtime. CXF does not support this feature yet. One can easily register a provider either from the Spring configuration :   </p>

<div class="code"><div class="codeContent">
<pre class="code-xml"><span class="code-tag">&lt;beans&gt;</span>
<span class="code-tag">&lt;jaxrs:server id=<span class="code-quote">"customerService"</span> address=<span class="code-quote">"/"</span>&gt;</span>
    <span class="code-tag">&lt;jaxrs:serviceBeans&gt;</span>
      <span class="code-tag">&lt;bean class=<span class="code-quote">"org.CustomerService"</span> /&gt;</span>
    <span class="code-tag">&lt;/jaxrs:serviceBeans&gt;</span>

    <span class="code-tag">&lt;jaxrs:entityProviders&gt;</span>
      <span class="code-tag">&lt;bean ref=<span class="code-quote">"isProvider"</span> /&gt;</span>
      <span class="code-tag">&lt;bean ref=<span class="code-quote">"longProvider"</span> /&gt;</span>
    <span class="code-tag">&lt;/jaxrs:entityProviders&gt;</span>
    <span class="code-tag">&lt;bean id=<span class="code-quote">"isProvider"</span> class=<span class="code-quote">"com.bar.providers.InputStreamProvider"</span>/&gt;</span>
    <span class="code-tag">&lt;bean id=<span class="code-quote">"longProvider"</span> class=<span class="code-quote">"com.bar.providers.LongProvider"</span>/&gt;</span>
<span class="code-tag">&lt;/jaxrs:server&gt;</span>
<span class="code-tag">&lt;/beans&gt;</span></pre>
</div></div>

<p>Please note that once CXF is updated to support a 0.7 version of JAX-RS api, &lt;jaxrs:entityProviders&gt; will be changed to &lt;jaxrs:providers&gt;. JAX-RS supports different types of providers and having a single &lt;jaxrs:providers&gt; container is in line with the way other JAX-RS implementations discover providers by checking for @Provider annotations only. </p>

<p>See below a more complete beans.xml definition.</p>



<h2><a name="JAX-RS%28JSR-311%29-Contenttypenegotiation"></a>Content type negotiation</h2>

<p>One of the coolest thing of REST is that the same resource can be served using multiple representations. @ProduceMime and @ConsumeMime annotations are used to declare the supported request and response media types. </p>


<h3><a name="JAX-RS%28JSR-311%29-JAXBsupport"></a>JAXB support</h3>

<p>The request and response can be marshaled and unmarshaled to/from Java object using JAXB. The Java object needs to be marked with @XmlRootElement annotation. For example:</p>
<div class="code"><div class="codeContent">
<pre class="code-java">@XmlRootElement(name = <span class="code-quote">"Customer"</span>)
<span class="code-keyword">public</span> class Customer {
    <span class="code-keyword">private</span> <span class="code-object">String</span> name;
    <span class="code-keyword">private</span> <span class="code-object">long</span> id;

    <span class="code-keyword">public</span> Customer() {
    }

    <span class="code-keyword">public</span> void setName(<span class="code-object">String</span> n) {
        name = n;
    }

    <span class="code-keyword">public</span> <span class="code-object">String</span> getName() {
        <span class="code-keyword">return</span> name;
    }

    <span class="code-keyword">public</span> void setId(<span class="code-object">long</span> i) {
        id = i;
    }

    <span class="code-keyword">public</span> <span class="code-object">long</span> getId() {
        <span class="code-keyword">return</span> id;
    }

}</pre>
</div></div>
<p>In the example below, the Customer object returned by getCustomer is marshaled using JAXB data binding:</p>
<div class="code"><div class="codeContent">
<pre class="code-java">@Path(<span class="code-quote">"/customerservice/"</span>)
<span class="code-keyword">public</span> class CustomerService {
    @GET
    @Path(<span class="code-quote">"/customers/{customerId}/"</span>)
    <span class="code-keyword">public</span> Customer getCustomer(@PathParam(<span class="code-quote">"customerId"</span>) <span class="code-object">String</span> id) {
        ....
    }
}</pre>
</div></div>
<p>The wire representation of Customer object is:</p>
<div class="code"><div class="codeContent">
<pre class="code-java">@Path(<span class="code-quote">"/customerservice/"</span>)
&lt;Customer&gt;
    &lt;id&gt;123&lt;/id&gt;
    &lt;name&gt;John&lt;/name&gt;
&lt;/Customer&gt;</pre>
</div></div>

<p>To work with collections, you need to define an object collection type. For example:</p>
<div class="code"><div class="codeContent">
<pre class="code-java">@XmlRootElement(name = <span class="code-quote">"Customers"</span>)
<span class="code-keyword">public</span> class Customers {
    <span class="code-keyword">private</span> Collection&lt;Customer&gt; customers;

    <span class="code-keyword">public</span> Collection&lt;Customer&gt; getCustomer() {
        <span class="code-keyword">return</span> customers;
    }

    <span class="code-keyword">public</span> void setCustomer(Collection&lt;Customer&gt; c) {
        <span class="code-keyword">this</span>.customers = c;
    }
}
@Path(<span class="code-quote">"/customerservice/"</span>)
<span class="code-keyword">public</span> class CustomerService {
    @GET
    @Path(<span class="code-quote">"/customers/"</span>)
    <span class="code-keyword">public</span> Customers getCustomers() {
        ....
    }
}</pre>
</div></div>

<h3><a name="JAX-RS%28JSR-311%29-JSONsupport"></a>JSON support</h3>

<p>Following code returns a Customer object that is marshaled to JSON format:</p>
<div class="code"><div class="codeContent">
<pre class="code-java">@Path(<span class="code-quote">"/customerservice/"</span>)
<span class="code-keyword">public</span> class CustomerService {
    @ProduceMime(<span class="code-quote">"application/json"</span>)
    @GET
    @Path(<span class="code-quote">"/customers/{customerId}/"</span>)
    <span class="code-keyword">public</span> Customer getCustomer(@PathParam(<span class="code-quote">"customerId"</span>) <span class="code-object">String</span> id) {
        ....
    }</pre>
</div></div>

<p>The wire representation of Customer object is:</p>
<div class="code"><div class="codeContent">
<pre class="code-java">{<span class="code-quote">"Customer "</span>:{<span class="code-quote">"id"</span>:<span class="code-quote">"123"</span>,<span class="code-quote">"name"</span>:<span class="code-quote">"john"</span>}}</pre>
</div></div>

<h3><a name="JAX-RS%28JSR-311%29-Sourcesupport"></a>Source support</h3>

<p>You can also receive the request as a Source object or return a Source object as response:</p>

<div class="code"><div class="codeContent">
<pre class="code-java">@Path(<span class="code-quote">"/customerservice/"</span>)
<span class="code-keyword">public</span> class CustomerService {
    @PUT
    @Path(<span class="code-quote">"/customers/"</span>)
    <span class="code-keyword">public</span> javax.xml.transform.Source updateCustomer(javax.xml.transform.Source ds) {
        ....
    }
}</pre>
</div></div>

<h2><a name="JAX-RS%28JSR-311%29-AdvancedContenttypenegotiation"></a>Advanced Content type negotiation</h2>

<p>CXF provides a partial support for an advanced content type negotiation by handling If-Match headers and ETags in its JAX-RS Request implementation. Neither If-Modified-Since nor Vary headers are currently supported.</p>

<h2><a name="JAX-RS%28JSR-311%29-SecureJAXRSservices"></a>Secure JAX-RS services</h2>

<p>A demo called samples\jax_rs\basic_https shows you how to do communications using HTTPS.</p>

<h1><a name="JAX-RS%28JSR-311%29-ConfiguringJAXRSservices"></a>Configuring JAX-RS services</h1>


<h2><a name="JAX-RS%28JSR-311%29-ConfiguringJAXRSservicesprogrammatically"></a>Configuring JAX-RS services programmatically</h2>

<p>You can create a JAX-RS RESTful service by using <span class="nobr"><a href="http://svn.apache.org/viewvc/cxf/trunk/rt/frontend/jaxrs/src/main/java/org/apache/cxf/jaxrs/JAXRSServerFactoryBean.java?view=markup&amp;pathrev=HEAD" title="Visit page outside Confluence" rel="nofollow">JAXRSServerFactoryBean<sup><img class="rendericon" src="/confluence/images/icons/linkext7.gif" height="7" width="7" align="absmiddle" alt="" border="0"/></sup></a></span> from the <em>cxf-rt-frontend-jaxrs</em> package: </p>
<div class="code"><div class="codeContent">
<pre class="code-java">JAXRSServerFactoryBean sf = <span class="code-keyword">new</span> JAXRSServerFactoryBean();
sf.setResourceClasses(CustomerService.class);
sf.setAddress(<span class="code-quote">"http:<span class="code-comment">//localhost:9000/"</span>);
</span>sf.create();</pre>
</div></div>
<p>A couple things to note:</p>
<ul>
	<li>The JAXRSServerFactoryBean creates a Server inside CXF which starts listening for requests on the URL specified.</li>
	<li>By default, the JAX-RS runtime is responsible for the lifecycle of resource classes, default lifecycle is per-request. You can set the lifecycle to singleton by using following line:
<div class="code"><div class="codeContent">
<pre class="code-java">sf.setResourceProvider(BookStore.class, <span class="code-keyword">new</span> SingletonResourceProvider());</pre>
</div></div></li>
	<li>If you prefer not to let the JAX-RS runtime to handle the resource class lifecycle for you (for example, it might be the case that your resource class is created by other containers such as Spring), you can do following:
<div class="code"><div class="codeContent">
<pre class="code-java">JAXRSServerFactoryBean sf = <span class="code-keyword">new</span> JAXRSServerFactoryBean();
CustomerService cs = <span class="code-keyword">new</span> CustomerService();
sf.setServiceBeans(cs);
sf.setAddress(<span class="code-quote">"http:<span class="code-comment">//localhost:9080/"</span>);
</span>sf.create();</pre>
</div></div></li>
</ul>


<h2><a name="JAX-RS%28JSR-311%29-ConfiguringJAXRSservicesincontainerwithSpringconfigurationfile."></a>Configuring JAX-RS services in container with Spring configuration file.</h2>


<h3><a name="JAX-RS%28JSR-311%29-web.xml"></a>web.xml</h3>

<div class="code"><div class="codeContent">
<pre class="code-xml"><span class="code-tag">&lt;?xml version=<span class="code-quote">"1.0"</span> encoding=<span class="code-quote">"ISO-8859-1"</span>?&gt;</span>

&lt;!DOCTYPE web-app
    PUBLIC <span class="code-quote">"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"</span>
    <span class="code-quote">"http://java.sun.com/dtd/web-app_2_3.dtd"</span>&gt;
<span class="code-tag">&lt;web-app&gt;</span>
	<span class="code-tag">&lt;context-param&gt;</span>
		<span class="code-tag">&lt;param-name&gt;</span>contextConfigLocation<span class="code-tag">&lt;/param-name&gt;</span>
		<span class="code-tag">&lt;param-value&gt;</span>WEB-INF/beans.xml<span class="code-tag">&lt;/param-value&gt;</span>
	<span class="code-tag">&lt;/context-param&gt;</span>

	<span class="code-tag">&lt;listener&gt;</span>
		<span class="code-tag">&lt;listener-class&gt;</span>
			org.springframework.web.context.ContextLoaderListener
		<span class="code-tag">&lt;/listener-class&gt;</span>
	<span class="code-tag">&lt;/listener&gt;</span>

	<span class="code-tag">&lt;servlet&gt;</span>
		<span class="code-tag">&lt;servlet-name&gt;</span>CXFServlet<span class="code-tag">&lt;/servlet-name&gt;</span>
		<span class="code-tag">&lt;display-name&gt;</span>CXF Servlet<span class="code-tag">&lt;/display-name&gt;</span>
		<span class="code-tag">&lt;servlet-class&gt;</span>
			org.apache.cxf.transport.servlet.CXFServlet
		<span class="code-tag">&lt;/servlet-class&gt;</span>
		<span class="code-tag">&lt;load-on-startup&gt;</span>1<span class="code-tag">&lt;/load-on-startup&gt;</span>
	<span class="code-tag">&lt;/servlet&gt;</span>

	<span class="code-tag">&lt;servlet-mapping&gt;</span>
		<span class="code-tag">&lt;servlet-name&gt;</span>CXFServlet<span class="code-tag">&lt;/servlet-name&gt;</span>
		<span class="code-tag">&lt;url-pattern&gt;</span>/*<span class="code-tag">&lt;/url-pattern&gt;</span>
	<span class="code-tag">&lt;/servlet-mapping&gt;</span>
<span class="code-tag">&lt;/web-app&gt;</span></pre>
</div></div>

<h3><a name="JAX-RS%28JSR-311%29-beans.xml"></a>beans.xml</h3>

<div class="code"><div class="codeContent">
<pre class="code-xml"><span class="code-tag">&lt;?xml version=<span class="code-quote">"1.0"</span> encoding=<span class="code-quote">"UTF-8"</span>?&gt;</span>
&lt;beans xmlns=<span class="code-quote">"http://www.springframework.org/schema/beans"</span>
  <span class="code-keyword">xmlns:xsi</span>=<span class="code-quote">"http://www.w3.org/2001/XMLSchema-instance"</span>
  <span class="code-keyword">xmlns:jaxrs</span>=<span class="code-quote">"http://cxf.apache.org/jaxrs"</span>
  xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://cxf.apache.org/jaxrs
http://cxf.apache.org/schemas/jaxrs.xsd"&gt;

  <span class="code-tag">&lt;import resource=<span class="code-quote">"classpath:META-INF/cxf/cxf.xml"</span> /&gt;</span>
  <span class="code-tag">&lt;import resource=<span class="code-quote">"classpath:META-INF/cxf/cxf-extension-jaxrs-binding.xml"</span> /&gt;</span>
  <span class="code-tag">&lt;import resource=<span class="code-quote">"classpath:META-INF/cxf/cxf-servlet.xml"</span> /&gt;</span>

  <span class="code-tag">&lt;jaxrs:server id=<span class="code-quote">"customerService"</span> address=<span class="code-quote">"/"</span>&gt;</span>
    <span class="code-tag">&lt;jaxrs:serviceBeans&gt;</span>
      <span class="code-tag">&lt;ref bean=<span class="code-quote">"customerService"</span> /&gt;</span>
    <span class="code-tag">&lt;/jaxrs:serviceBeans&gt;</span>
  <span class="code-tag">&lt;/jaxrs:server&gt;</span>

  <span class="code-tag">&lt;bean id=<span class="code-quote">"customerService"</span> class=<span class="code-quote">"demo.jaxrs.server.CustomerService"</span> /&gt;</span>
<span class="code-tag">&lt;/beans&gt;</span></pre>
</div></div>


<h2><a name="JAX-RS%28JSR-311%29-CombiningJAXWSandJAXRS"></a>Combining JAX-WS and JAX-RS</h2>

<p>Here's a beans.xml showing how to have a single service class supporting both SOAP and REST-based invocations at the same time with the help of JAX-WS and JAX-RS : </p>

<div class="code"><div class="codeContent">
<pre class="code-xml"><span class="code-tag">&lt;?xml version=<span class="code-quote">"1.0"</span> encoding=<span class="code-quote">"UTF-8"</span>?&gt;</span>
&lt;beans xmlns=<span class="code-quote">"http://www.springframework.org/schema/beans"</span>
  <span class="code-keyword">xmlns:xsi</span>=<span class="code-quote">"http://www.w3.org/2001/XMLSchema-instance"</span>
  <span class="code-keyword">xmlns:jaxrs</span>=<span class="code-quote">"http://cxf.apache.org/jaxrs"</span>
  <span class="code-keyword">xmlns:jaxws</span>=<span class="code-quote">"http://cxf.apache.org/jaxws"</span>
  xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://cxf.apache.org/jaxrs
http://cxf.apache.org/schemas/jaxrs.xsd
http://cxf.apache.org/jaxws
http://cxf.apache.org/schemas/jaxws.xsd"&gt;

  <span class="code-tag">&lt;import resource=<span class="code-quote">"classpath:META-INF/cxf/cxf.xml"</span> /&gt;</span>
  <span class="code-tag">&lt;import resource=<span class="code-quote">"classpath:META-INF/cxf/cxf-extension-jaxrs-binding.xml"</span> /&gt;</span>
  <span class="code-tag">&lt;import resource=<span class="code-quote">"classpath:META-INF/cxf/cxf-servlet.xml"</span> /&gt;</span>

  <span class="code-tag"><span class="code-comment">&lt;!-- JAX-RS --&gt;</span></span>
  <span class="code-tag">&lt;jaxrs:server id=<span class="code-quote">"customerService"</span> address=<span class="code-quote">"/"</span>&gt;</span>
    <span class="code-tag">&lt;jaxrs:serviceBeans&gt;</span>
      <span class="code-tag">&lt;ref bean=<span class="code-quote">"customerService"</span> /&gt;</span>
    <span class="code-tag">&lt;/jaxrs:serviceBeans&gt;</span>
  <span class="code-tag">&lt;/jaxrs:server&gt;</span>

  <span class="code-tag"><span class="code-comment">&lt;!-- JAX-WS --&gt;</span></span>
  &lt;jaxws:endpoint implementor=<span class="code-quote">"#customerService"</span>
    address=<span class="code-quote">"/CustomerWorld"</span> wsdlLocation=<span class="code-quote">"..."</span>/&gt;
  
  <span class="code-tag">&lt;bean id=<span class="code-quote">"customerService"</span> class=<span class="code-quote">"demo.jaxrs.server.CustomerService"</span> /&gt;</span>
<span class="code-tag">&lt;/beans&gt;</span></pre>
</div></div>

<p>Either contract-first or Java-first approach can be used for JAX-WS. JAX-RS annotations can be added to the existing service class. Some custom providers may need to be created, depending on the complexity of the method signatures.</p>

<p>When a WSDL-first approach is used then a document-literal-wrapped style may or may not be a good fit as the code generator unwraps all the types into a signature, for example :</p>

<div class="code"><div class="codeContent">
<pre class="code-java"><span class="code-keyword">public</span> class CustomerService {
   void doIt(<span class="code-object">String</span> a, <span class="code-object">String</span> b) {...};
}</pre>
</div></div>  

<p>By default JAX-RS may not be able to handle such methods as it requires that only a single parameter can be available in a signature that is not annotated by one of the JAX-RS annotations like @PathParam. So if <br/>
a 'String a' parameter can be mapped to a @Path template variable or one of the query segments then this signature won't need to be changed :</p>

<div class="code"><div class="codeContent">
<pre class="code-java">@Path(<span class="code-quote">"/customers/{a}"</span>)
<span class="code-keyword">public</span> class CustomerService {
   void doIt(@PathParam(<span class="code-quote">"a"</span>) <span class="code-object">String</span> a, <span class="code-object">String</span> b) {...};
}</pre>
</div></div>  

<p>For methods returning 'void', a simple custom provider can be created which will basically be a no-op implementation. </p>

<h2><a name="JAX-RS%28JSR-311%29-JAXRSandSpringAOP"></a>JAX-RS and Spring AOP</h2>

<p>CXF JAX-RS is capable of working with AOP interceptors applied to resource classes from Spring.<br/>
For example :</p>

<div class="code"><div class="codeContent">
<pre class="code-xml"><span class="code-tag">&lt;beans xsi:schemaLocation=<span class="code-quote">" http://www.springframework.org/schema/beans  http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/aop  http://www.springframework.org/schema/aop/spring-aop.xsd http://cxf.apache.org/jaxrs http://cxf.apache.org/schemas/jaxrs.xsd"</span>&gt;</span>
<span class="code-tag">&lt;import resource=<span class="code-quote">"classpath:META-INF/cxf/cxf.xml"</span>/&gt;</span>
<span class="code-tag">&lt;import resource=<span class="code-quote">"classpath:META-INF/cxf/cxf-extension-jaxrs-binding.xml"</span>/&gt;</span>
<span class="code-tag">&lt;import resource=<span class="code-quote">"classpath:META-INF/cxf/cxf-servlet.xml"</span>/&gt;</span>

  <span class="code-tag">&lt;jaxrs:server id=<span class="code-quote">"bookservice"</span> address=<span class="code-quote">"/"</span>&gt;</span>
	<span class="code-tag">&lt;jaxrs:serviceBeans&gt;</span>
          <span class="code-tag">&lt;ref bean=<span class="code-quote">"bookstore"</span>/&gt;</span>
          <span class="code-tag">&lt;ref bean=<span class="code-quote">"bookstoreInterface"</span>/&gt;</span>
        <span class="code-tag">&lt;/jaxrs:serviceBeans&gt;</span>
   <span class="code-tag">&lt;/jaxrs:server&gt;</span>
   <span class="code-tag">&lt;bean id=<span class="code-quote">"bookstore"</span> class=<span class="code-quote">"org.apache.cxf.systest.jaxrs.BookStore"</span>/&gt;</span>
   <span class="code-tag">&lt;bean id=<span class="code-quote">"bookstoreInterface"</span> class=<span class="code-quote">"org.apache.cxf.systest.jaxrs.BookStoreWithInterface"</span>/&gt;</span>

   <span class="code-tag">&lt;aop:config&gt;</span>
	<span class="code-tag">&lt;aop:aspect id=<span class="code-quote">"loggingAspect"</span> ref=<span class="code-quote">"simpleLogger"</span>&gt;</span>
          <span class="code-tag">&lt;aop:before method=<span class="code-quote">"logBefore"</span> pointcut=<span class="code-quote">"execution(* org.apache.cxf.systest.jaxrs.BookStore*.*(..))"</span>/&gt;</span>
          <span class="code-tag">&lt;aop:after-returning method=<span class="code-quote">"logAfter"</span> pointcut=<span class="code-quote">"execution(* org.apache.cxf.systest.jaxrs.BookStore*.*(..))"</span>/&gt;</span>
        <span class="code-tag">&lt;/aop:aspect&gt;</span>
   <span class="code-tag">&lt;/aop:config&gt;</span>
   <span class="code-tag">&lt;bean id=<span class="code-quote">"simpleLogger"</span> class=<span class="code-quote">"org.apache.cxf.systest.jaxrs.SimpleLoggingAspect"</span>/&gt;</span>
<span class="code-tag">&lt;/beans&gt;</span></pre>
</div></div> 

<p>Note that some AOP configuration is applied to two JAX-RS resource classes. By default Spring uses JDK dynamic proxies every time a class to be proxified implements at least one interface or CGLIB proxies otherwise. </p>

<p>For example, here's how org.apache.cxf.systest.jaxrs.BookStoreWithInterface looks like : </p>

<div class="code"><div class="codeContent">
<pre class="code-java"><span class="code-keyword">public</span> <span class="code-keyword">interface</span> BookInterface {
    @GET
    @Path(<span class="code-quote">"/thosebooks/{bookId}/"</span>)
    @ProduceMime(<span class="code-quote">"application/xml"</span>)
    Book getThatBook(<span class="code-object">Long</span> id) <span class="code-keyword">throws</span> BookNotFoundFault;
}

<span class="code-keyword">public</span> class BookStoreWithInterface <span class="code-keyword">extends</span> BookStoreStorage <span class="code-keyword">implements</span> BookInterface {

    <span class="code-keyword">public</span> Book getThatBook(@PathParam(<span class="code-quote">"bookId"</span>) <span class="code-object">Long</span> id) <span class="code-keyword">throws</span> BookNotFoundFault {
        <span class="code-keyword">return</span> doGetBook(id);
    }

    @Path(<span class="code-quote">"/thebook"</span>)
    <span class="code-keyword">public</span> Book getTheBook(@PathParam(<span class="code-quote">"bookId"</span>) <span class="code-object">Long</span> id) <span class="code-keyword">throws</span> BookNotFoundFault {
        <span class="code-keyword">return</span> doGetBook(id);
    }
}</pre>
</div></div>

<p>In this case Spring will use a JDK proxy to wrap a BookStoreWithInterface class. As such it is important that a method which needs to be invoked such as getThatBook(...) is part of the interface. </p>

<p>The other method, getTheBook() can not be dispatched to by a JAX-RS runtime as it's not possible to discover it through a JDK proxy. If this method also needs to be invoked then this method should either be added to the interface or CGLIB proxies have to be explicitly enabled (consult Spring AOP documentation for more details) </p>

<h2><a name="JAX-RS%28JSR-311%29-AreasforimprovementandTODOlist."></a>Areas for improvement and TODO list.</h2></div>


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