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Saving token for RestEasy web service
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created by <a href="https://community.jboss.org/people/sej">Steve Jagels</a> in <i>JBoss Web Services</i> - <a href="https://community.jboss.org/message/741035#741035">View the full discussion</a>
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<div class="jive-rendered-content"><p>Awhile back I created a jboss jax-ws web service and for security I had it save a token to the session.  It has worked fine.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Now I have a Rest Easy web service and I need it to also save a token to the web service session. I have looked at doing it two ways, but neither one is working.  The first way uses @Resource and the session gets a null pointer exception.  The second way uses @Context and the session is not null, but any attribute saved to it (token) is null.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><strong>First way</strong> (same as is working for the jboss jax-ws web service):</p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #646464;">@Resource</span> <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">private</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> <span style="background: silver;">WebServiceContext</span> </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0000c0;">ctx</span>;</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="margin-bottom: 0.0001pt;"><strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">public</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> String <span style="background: silver;">saveTokenToSession</span>(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #646464;">@QueryParam</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"consumerName"</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">) String consumerName, </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #646464;">@QueryParam</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"token"</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">) String token){</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">   HttpSession session = getTheSession();</span></p><p style="margin-bottom: 0.0001pt;">      <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">if</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> (session == </span><strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">null</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">) {</span></p><p style="margin-bottom: 0.0001pt;">            <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">throw</strong> <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">new</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> WebServiceException(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"Error: could not get session for web service."</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">);</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">   }</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="margin-bottom: 0.0001pt;">      <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">if</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> (!<em>checkLogin</em>(token)) {</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">      System.</span><em style="color: #0000c0; font-size: 10.0pt; font-family: 'Courier New';">out</em><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">.println(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"Saving token to session - invalid token."</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">);</span></p><p style="margin-bottom: 0.0001pt;">            <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">return</strong> <span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"N"</span>;</p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">   }</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">   session.setAttribute(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"token"</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">, token);</span></p><p style="margin-bottom: 0.0001pt;">      </p><p style="margin-bottom: 0.0001pt;">      <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">return</strong> <span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"Y"</span>;</p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> }</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="margin-bottom: 0.0001pt;"><strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">private</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> HttpSession getTheSession() {</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">   javax.xml.ws.handler.MessageContext mc = </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #0000c0;">ctx</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">.getMessageContext();  </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #76923c;">//null pointer exception occurs here</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">   HttpServletRequest request = (javax.servlet.http.HttpServletRequest) mc.get(javax.xml.ws.handler.MessageContext.</span><em style="color: #0000c0; font-size: 10.0pt; font-family: 'Courier New';">SERVLET_REQUEST</em><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">);</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">   HttpSession session = request.getSession();</span></p><p style="margin-bottom: 0.0001pt;">      <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">return</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> session;</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">}</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><strong>Second way</strong>:</p><p style="margin-bottom: 0.0001pt;"><strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">public</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> String <span style="background: silver;">saveTokenToSession</span>(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #646464;">@QueryParam</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"consumerName"</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">) String consumerName, </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #646464;">@QueryParam</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"token"</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">) String token, </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #646464;">@Context</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> HttpServletRequest inRequest){</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">   HttpSession session = inRequest.getSession();</span></p><p style="margin-bottom: 0.0001pt;">      <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">if</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> (session == </span><strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">null</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">) {  </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #76923c;">//session is not null</span></p><p style="margin-bottom: 0.0001pt;">            <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">throw</strong> <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">new</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> WebServiceException(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"Error: could not get session for web service."</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">);</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">   }</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="margin-bottom: 0.0001pt;">      <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">if</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> (!<em>checkLogin</em>(token)) {</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">      System.</span><em style="color: #0000c0; font-size: 10.0pt; font-family: 'Courier New';">out</em><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">.println(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"Saving token to session - invalid token."</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">);</span></p><p style="margin-bottom: 0.0001pt;">            <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">return</strong> <span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"N"</span>;</p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">   }</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">   session.setAttribute(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"token"</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">, token);</span></p><p style="margin-bottom: 0.0001pt;">            </p><p style="margin-bottom: 0.0001pt;">      <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">return</strong> <span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"Y"</span>;</p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">}</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="margin-bottom: 0.0001pt;"><strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">public</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> String getPermissions(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #646464;">@QueryParam</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"consumerName"</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">) String consumerName, </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #646464;">@QueryParam</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"strPermission"</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">) String strPermission, </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #646464;">@Context</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> HttpServletRequest inRequest) {</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">      List<Permission> toBeReturned = </span><strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">null</strong>;</p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">      Permission permissionInput = </span><strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">null</strong>;</p><p style="margin-bottom: 0.0001pt;">            <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">try</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> {</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">         String token;</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">         HttpSession session = inRequest.getSession();<br/></span></p><p style="margin-bottom: 0.0001pt;">                  <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">if</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> (session == </span><strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">null</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">) {  </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #76923c;">//session is not null</span></p><p style="margin-bottom: 0.0001pt;">                        <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">throw</strong> <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">new</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> WebServiceException(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"Error: could not get session for web service."</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">);</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">         }</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">         token = (String) session.getAttribute(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">"token"</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">);  </span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #76923c;">//null</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="margin-bottom: 0.0001pt;">                  <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">if</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> (</span><strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">null</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> == token || token.equals(</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">""</span><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">)){</span></p><p style="margin-bottom: 0.0001pt;">                        <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">return</strong> <span style="font-size: 10.0pt; font-family: 'Courier New'; color: #2a00ff;">""</span>;</p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">         }</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">         ...<br/></span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">         ...<br/></span></p><p style="margin-bottom: 0.0001pt;">                  <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">return</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;"> permissions;</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">      }</span><strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">catch</strong><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">(Exception e){</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">         e.printStackTrace();</span></p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">      }</span></p><p style="margin-bottom: 0.0001pt;">            <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">return</strong> <strong style="color: #7f0055; font-size: 10.0pt; font-family: 'Courier New';">null</strong>;</p><p style="margin-bottom: 0.0001pt;"><span style="font-size: 10.0pt; font-family: 'Courier New'; color: black;">}</span></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Any idea why either of these does not work?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>I'm using jboss 5.1.2 and jdk 1.6.0.</p></div>
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