[dwr] utilisation des methodes java

Bonjour,

je travaille actuellement sur une appli java utilisant Spring et DWR.

L'intégration de dwr est fonctionnelle car le debugger dwr m'affiche bien ma classe et les méthodes fonctionnent correctement.

Cependant lorsque j'essaye d'utiliser ma classe dans le javascript en affectant à une variable le retour d'une méthode, j'obtiens comme résultat : undefined.

J'ai pourtant inclus les fichiers indiquer par dwr.

Voila un exemple d'appel d'une méthode qui fonctionne dans le debugger dwr mais pas dans mon code :

Code:

var ids=updater.getIds();

updater étant l'objet me premettant d'utiliser mes methodes java.

Merci pour votre aide.

Bonjour,

Citation:

Envoyé par kraten

L'intégration de dwr est fonctionnelle car le debugger dwr m'affiche bien ma classe et les méthodes fonctionnent correctement.

Que DWR sache interpréter le code qu'il a généré est une chose.
Que ce code soit valide pour un (vrai) navigateur en est une autre :aie:

Peux-tu nous montrer ce code généré (récupéré à partir du nav, pas de DWR) ?
Il faudrait le code de la fonction updater.getIds(); ainsi que celui de la fonction à partir de laquelle elle est appelée, et enfin les parties HTML concernées ...

A+

Essaye comme ça :

Code:

var ids=document.JavaApplet.updater.getIds();

Tout 'abord, merci d'avoir répondu aussi vite :D

la fonction getIds() ne fait que récuperé une liste d'objet :

Code:

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 public static List<Integer> getIds() {
        return ids;
    }

le code de la fonction ou elle est appellée :

Code:

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function Maj() {
 
    var brandName=dwr.util.getValue("manufacturier");
    updater.setAttributes(brandName,updateSelect());
    //permet de mettre a jour les ids de "updater" 
 
}
function updateSelect(){
    var selectPattern =document.getElementById("pattern");
    for (var i=0; i < selectPattern.length-1; i++){
        selectPattern.options[i]=null;
        i--; 
    }
    var ids=updater.getIds();
    alert("getIds   "+ids);//c'est ici que j'ai le undefined
...
 
    }
}

la page HTML concernée :

Code:

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<head>
<title>Recherche</title>
</head>
<script type='text/javascript' src='/monAppli/dwr/interface/updater.js'></script>
<script type='text/javascript' src='/monAppli/dwr/engine.js'></script>
<script type='text/javascript' src='/monAppli/dwr/util.js'></script>
<script type="text/javascript" src='js/update.js'></script>
 
 
 
<body >
 
 
    <h2>Recherche </h2>
 
 
    <form name="logForm" method="post" action="search.html" >
 
        <table border="0">
 
            <tbody>
                <tr>
                    <td> Manufacturier : </td>
                    <td><select name="manufacturier"  id="manufacturier" onchange="javascript:Maj()">
                            <option value="none">---</option>
                            <c:forEach var="brand" items="${brands}" >
                                <option>${brand}</option>
                            </c:forEach>
                        </select></td>
                    <td> Pays :<select name="pays" >
 
                            <c:forEach var="pays" items="${countries}" >
                                <option>${pays}</option>
                            </c:forEach>
                        </select>
                    </td>
                </tr>
                <tr>
                    <td>de
                        <input type="text" name="beginning" value="2008" size="4" maxlength="4"/>
                        a: <input type="text" name="end" value="2008" size="4" maxlength="4"/></td>
                </tr>
                <tr>
                    <td>Pattern :</td>
                    <td><select name="pattern" id="pattern" disabled="disabled">
                             <option></option>
                        </select>
                    </td>
 
                </tr>

Concernant le code dwr voici celui de la page du debugger :

Code:

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<html>
<head>
  <title>DWR Test</title>
  <!-- These paths use .. so that they still work behind a path mapping proxy. The fully qualified version is more cut and paste friendly. -->
  <script type='text/javascript' src='../interface/updater.js'></script>
  <script type='text/javascript' src='../engine.js'></script>
  <script type='text/javascript' src='../util.js'></script>
  <script type='text/javascript'>
  function objectEval(text)
  {
    // eval() breaks when we use it to get an object using the { a:42, b:'x' }
    // syntax because it thinks that { and } surround a block and not an object
    // So we wrap it in an array and extract the first element to get around
    // this.
    // This code is only needed for interpreting the parameter input fields,
    // so you can ignore this for normal use.
    // The regex = [start of line][whitespace]{[stuff]}[whitespace][end of line]
    text = text.replace(/\n/g, ' ');
    text = text.replace(/\r/g, ' ');
    if (text.match(/^\s*\{.*\}\s*$/))
    {
      text = '[' + text + '][0]';
    }
    return eval(text);
  }
  </script>
 
  <style>
    input.itext { font-size: smaller; background: #E4E4E4; border: 0; }
    input.ibutton { font-size: xx-small; border: 1px outset; margin: 0px; padding: 0px; }
    span.reply { background: #ffffdd; white-space: pre; }
    span.warning { font-size: smaller; color: red; }
  </style>
</head>
<body onload='dwr.util.useLoadingMessage()'>
<h2>Methods For: updater (recherche.UpdateDwr)</h2>
<p>To use this class in your javascript you will need the following script includes:</p>
<pre>
  &lt;script type='text/javascript' src='<a href='/BFinterface/dwr/interface/updater.js'>/BFinterface/dwr/interface/updater.js</a>'&gt;&lt;/script&gt;
  &lt;script type='text/javascript' src='<a href='/BFinterface/dwr/engine.js'>/BFinterface/dwr/engine.js</a>'&gt;&lt;/script&gt;
 
</pre>
<p>In addition there is an optional utility script:</p>
<pre>
  &lt;script type='text/javascript' src='<a href='/BFinterface/dwr/util.js'>/BFinterface/dwr/util.js</a>'&gt;&lt;/script&gt;
</pre>
<p>Replies from DWR are shown with a yellow background if they are simple or in an alert box otherwise.<br/>
The inputs are evaluated as Javascript so strings must be quoted before execution.</p>
<li>
  setAttributes(    <input class='itext' type='text' size='10' value='""' id='p00' title='Will be converted to: java.lang.String'/>, 
AUTO  );
  <input class='ibutton' type='button' onclick='updater.setAttributes(objectEval($("p00").value), reply0);' value='Execute'  title='Calls updater.setAttributes(). View source for details.'/>
 
  <script type='text/javascript'>
    var reply0 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d0', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
  <span id='d0' class='reply'></span>
</li>
<li>
  getIds(AUTO  );
  <input class='ibutton' type='button' onclick='updater.getIds(reply1);' value='Execute'  title='Calls updater.getIds(). View source for details.'/>
  <script type='text/javascript'>
    var reply1 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d1', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
  <span id='d1' class='reply'></span>
</li>
<li>
 
  getNames(AUTO  );
  <input class='ibutton' type='button' onclick='updater.getNames(reply2);' value='Execute'  title='Calls updater.getNames(). View source for details.'/>
  <script type='text/javascript'>
    var reply2 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d2', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
  <span id='d2' class='reply'></span>
</li>
<li>
  setIds(    <input class='itext' type='text' size='10' value='[]' id='p30' title='Will be converted to: java.util.List'/>, 
AUTO  );
  <input class='ibutton' type='button' onclick='updater.setIds(objectEval($("p30").value), reply3);' value='Execute'  title='Calls updater.setIds(). View source for details.'/>
  <script type='text/javascript'>
    var reply3 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d3', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
 
  <span id='d3' class='reply'></span>
</li>
<li>
  setNames(    <input class='itext' type='text' size='10' value='[]' id='p40' title='Will be converted to: java.util.List'/>, 
AUTO  );
  <input class='ibutton' type='button' onclick='updater.setNames(objectEval($("p40").value), reply4);' value='Execute'  title='Calls updater.setNames(). View source for details.'/>
  <script type='text/javascript'>
    var reply4 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d4', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
  <span id='d4' class='reply'></span>
</li>
<li>
  getCurrentBrandName(AUTO  );
  <input class='ibutton' type='button' onclick='updater.getCurrentBrandName(reply5);' value='Execute'  title='Calls updater.getCurrentBrandName(). View source for details.'/>
 
  <script type='text/javascript'>
    var reply5 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d5', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
  <span id='d5' class='reply'></span>
</li>
<li>
  setCurrentBrandName(    <input class='itext' type='text' size='10' value='""' id='p60' title='Will be converted to: java.lang.String'/>, 
AUTO  );
  <input class='ibutton' type='button' onclick='updater.setCurrentBrandName(objectEval($("p60").value), reply6);' value='Execute'  title='Calls updater.setCurrentBrandName(). View source for details.'/>
  <script type='text/javascript'>
    var reply6 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d6', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
  <span id='d6' class='reply'></span>
</li>
 
<li>
  hashCode(  );
  <input class='ibutton' type='button' onclick='updater.hashCode(reply7);' value='Execute'  title='Calls updater.hashCode(). View source for details.'/>
  <script type='text/javascript'>
    var reply7 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d7', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
  <span id='d7' class='reply'></span>
<br/><span class='warning'>(Warning: hashCode() is excluded: Methods defined in java.lang.Object are not accessible. See <a href='#excludedMethod'>below</a>)</span>
</li>
<li>
  getClass(  );
  <input class='ibutton' type='button' onclick='updater.getClass(reply8);' value='Execute'  title='Calls updater.getClass(). View source for details.'/>
 
  <script type='text/javascript'>
    var reply8 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d8', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
  <span id='d8' class='reply'></span>
<br/><span class='warning'>(Warning: No Converter for java.lang.Class. See <a href='#missingConverter'>below</a>)</span>
<br/><span class='warning'>(Warning: getClass() is excluded: Methods defined in java.lang.Object are not accessible. See <a href='#excludedMethod'>below</a>)</span>
</li>
<li>
  equals(    <input class='itext' type='text' size='10' value='' id='p90' title='Will be converted to: java.lang.Object'/>  );
  <input class='ibutton' type='button' onclick='updater.equals(objectEval($("p90").value), reply9);' value='Execute'  title='Calls updater.equals(). View source for details.'/>
 
  <script type='text/javascript'>
    var reply9 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d9', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
  <span id='d9' class='reply'></span>
<br/><span class='warning'>(Warning: No Converter for java.lang.Object. See <a href='#missingConverter'>below</a>)</span>
<br/><span class='warning'>(Warning: equals() is excluded: Methods defined in java.lang.Object are not accessible. See <a href='#excludedMethod'>below</a>)</span>
</li>
<li>
  toString(  );
  <input class='ibutton' type='button' onclick='updater.toString(reply10);' value='Execute'  title='Calls updater.toString(). View source for details.'/>
 
  <script type='text/javascript'>
    var reply10 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d10', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
  <span id='d10' class='reply'></span>
<br/><span class='warning'>(Warning: toString() is excluded: Methods defined in java.lang.Object are not accessible. See <a href='#excludedMethod'>below</a>)</span>
</li>
<li>
  wait(    <input class='itext' type='text' size='10' value='0' id='p110' title='Will be converted to: long'/>, 
    <input class='itext' type='text' size='10' value='0' id='p111' title='Will be converted to: int'/>  );
  <input class='ibutton' type='button' onclick='updater.wait(objectEval($("p110").value), objectEval($("p111").value), reply11);' value='Execute'  title='Calls updater.wait(). View source for details.'/>
 
  <script type='text/javascript'>
    var reply11 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d11', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
  <span id='d11' class='reply'></span>
<br/><span class='warning'>(Warning: overloaded methods are not recommended. See <a href='#overloadedMethod'>below</a>)</span>
<br/><span class='warning'>(Warning: wait() is excluded: Methods defined in java.lang.Object are not accessible. See <a href='#excludedMethod'>below</a>)</span>
</li>
<li>
  wait(    <input class='itext' type='text' size='10' value='0' id='p120' title='Will be converted to: long'/>  );
  <input class='ibutton' type='button' onclick='updater.wait(objectEval($("p120").value), reply12);' value='Execute'  title='Calls updater.wait(). View source for details.'/>
 
  <script type='text/javascript'>
    var reply12 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d12', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
  <span id='d12' class='reply'></span>
<br/><span class='warning'>(Warning: overloaded methods are not recommended. See <a href='#overloadedMethod'>below</a>)</span>
<br/><span class='warning'>(Warning: wait() is excluded: Methods defined in java.lang.Object are not accessible. See <a href='#excludedMethod'>below</a>)</span>
</li>
<li>
  wait(  );
  <input class='ibutton' type='button' onclick='updater.wait(reply13);' value='Execute'  title='Calls updater.wait(). View source for details.'/>
 
  <script type='text/javascript'>
    var reply13 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d13', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
  <span id='d13' class='reply'></span>
<br/><span class='warning'>(Warning: overloaded methods are not recommended. See <a href='#overloadedMethod'>below</a>)</span>
<br/><span class='warning'>(Warning: wait() is excluded: Methods defined in java.lang.Object are not accessible. See <a href='#excludedMethod'>below</a>)</span>
</li>
<li>
  notify(  );
  <input class='ibutton' type='button' onclick='updater.notify(reply14);' value='Execute'  title='Calls updater.notify(). View source for details.'/>
 
  <script type='text/javascript'>
    var reply14 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d14', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
  <span id='d14' class='reply'></span>
<br/><span class='warning'>(Warning: notify() is excluded: Methods defined in java.lang.Object are not accessible. See <a href='#excludedMethod'>below</a>)</span>
</li>
<li>
  notifyAll(  );
  <input class='ibutton' type='button' onclick='updater.notifyAll(reply15);' value='Execute'  title='Calls updater.notifyAll(). View source for details.'/>
  <script type='text/javascript'>
    var reply15 = function(data)
    {
      if (data != null && typeof data == 'object') alert(dwr.util.toDescriptiveString(data, 2));
      else dwr.util.setValue('d15', dwr.util.toDescriptiveString(data, 1));
    }
  </script>
 
  <span id='d15' class='reply'></span>
<br/><span class='warning'>(Warning: notifyAll() is excluded: Methods defined in java.lang.Object are not accessible. See <a href='#excludedMethod'>below</a>)</span>
</li>
</ul>
<h2>Other Links</h2>
<ul>
<li>Back to <a href='/BFinterface/dwr/'>class index</a>.</li>
</ul>
<div>
 
<h2>Fixing Issues</h2>
 
<h3><a name="missingConverter">Warning: No Converter for XXX.</a></h3>
<p>
  dwr.xml does not have an allow entry that enables conversion of this type to
  Javascript. The most common cause of this problem is that XXX is a java bean
  and bean marshalling has not been enabled. Bean marshalling is disabled by
  default for security reasons.
</p>
<p>
  To enable marshalling for a given bean add the following line to the allow
  section of your dwr.xml file:
</p>
<pre>
&lt;convert converter="bean" match="XXX"/&gt;
 
</pre>
<p>
  It is also possible to enable marshalling for an entire package or hierachy
  of packages using the following:
</p>
<pre>
&lt;convert converter="bean" match="package.name.*"/&gt;
</pre>
 
<h3><a name="overloadedMethod">Warning: overloaded methods are not recommended</a></h3>
<p>
  Javascript does not support overloaded methods, so the javascript file
  generated from this class will contain two methods the second of which will
  replace the first. This is probably not what you wanted.
</p>
<p>
 
  It is best to avoid overloaded methods when using DWR.
</p>
 
<h3><a name="excludedMethod">Warning: methodName() is excluded:</a></h3>
<p>
  The methods may be excluded explicitly with an &lt;exclude&gt; element in
  dwr.xml or excluded implicitly by not being mentioned in an &lt;include&gt;
  element. Or the method may be defined in <code>java.lang.Object</code> -
  methods defined here may not be exported.
 
</p>
<p>
  If methods are excluded using &lt;include&gt; or &lt;exclude&gt; then no
  JavaScript proxy will be generated. To allow testing of methods that should
  not be accessible, add an init-param to WEB-INF/web.xml with the name/value
  allowImpossibleTests=true.
</p>
 
</div>
</body></html>

ps : j'ai essaye avec

Code:

var ids=document.JavaApplet.updater.getIds();

mais je n'ai meme plus la popup qui s'affiche. (firebugg me dit que document.JavaApplet n'est pas defini )

Normal c'est de l'ajax et non de l' applet!

http://baptiste-meurant.developpez.c...ing-hibernate/

Bonjour,

Je déterre ce topic car je me trouve dans la même situation.

Trois jours que je planche là-dessus (je "débute" en JavaScript et en Dwr)...

Soit le code JavaScript suivant :
Code:

1 2 3 4 5 6 7 function checkUsername() { username = dwr.util.getValue("empUserName"); // identique à getElementById('empUserName') Dwr.checkUsername(username, function(data) { dwr.util.setValue("empUserName", data); // va modifier la valeur renseignée dans le input type text empUserName si celle-ci est différente de celle renseignée au moment de l'appel de la fonction (sur évènement onchange) }); }
La méthode checkUsernane côté Java (au travers de ma classe Dwr) me renvoit une string ; côté client, le champ empUserName est ainsi dynamiquement modifié.

Je voudrais donc récupérer la valeur de retour de cette méthode.

Si je fais un getElementById('empUserName') après l'appel à la fonction, il me retourne invariablement la valeur initialement renseignée même si celle a donc été modifiée par la fonction...

Merci pour votre aide.

Bonjour ,

J'ai integré dwr avec spring...Par exemple j'ai mon dwr.xml qui contient le code suivant :
Code:

1 2 3 4 5 6 7 <create creator="springé javascript="Atest"> <param name="beanName" value="Atest"/> </create> <convert converter="bean" match="monpackage.*"/>
Quant j'ouvre l'url "/monProjet/Atest.js " , je trouve les different.es methodes de ma classe monpackage.Atest qui s'executent sans probleme mais
quand je veux utiliser mon bean Atest dans mon fichier .js ...ils me disent " Atest is undefined :s :s

Qui peuuut m'aider