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CDI cannot retrieve servlet responde using @Context annotation
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created by <a href="https://community.jboss.org/people/opensas">sebastián scarano</a> in <i>JBoss Web Development</i> - <a href="https://community.jboss.org/message/742035#742035">View the full discussion</a>
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<div class="jive-rendered-content"><p style="margin-bottom: 1em; background-color: #ffffff; color: #000000; font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif;">I have a jax-rs web service returning json, and I'd like to add cors headers to it.</p><p style="margin-bottom: 1em; background-color: #ffffff; color: #000000; font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif;">so I Have the following class:</p><pre class="default prettyprint" style="margin-bottom: 10px; background-color: #eeeeee; font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif; color: #000000; padding: 5px;"><code style="font-family: Consolas, Menlo, Monaco, 'Lucida Console', 'Liberation Mono', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', 'Courier New', monospace, serif;"><span class="pun">[...]</span><span class="pln"><br/></span><span class="kwd" style="color: #00008b;">import</span><span class="pln"> javax</span><span class="pun">.</span><span class="pln">enterprise</span><span class="pun">.</span><span class="pln">context</span><span class="pun">.</span><span class="typ" style="color: #2b91af;">RequestScoped</span><span class="pun">;</span><span class="pln"><br/></span><span class="kwd" style="color: #00008b;">import</span><span class="pln"> javax</span><span class="pun">.</span><span class="pln">servlet</span><span class="pun">.</span><span class="pln">http</span><span class="pun">.</span><span class="typ" style="color: #2b91af;">HttpServletResponse</span><span class="pun">;</span><span class="pln"><br/></span><span class="kwd" style="color: #00008b;">import</span><span class="pln"> javax</span><span class="pun">.</span><span class="pln">ws</span><span class="pun">.</span><span class="pln">rs</span><span class="pun">.</span><span class="typ" style="color: #2b91af;">Path</span><span class="pun">;</span><span class="pln"><br/></span><span class="pun">[...]</span><span class="pln"><br/><br/></span><span class="lit" style="color: #800000;">@Stateful</span><span class="pln"><br/></span><span class="lit" style="color: #800000;">@Path</span><span class="pun">(</span><span class="str" style="color: #800000;">"/grupo"</span><span class="pun">)</span><span class="pln"><br/></span><span class="lit" style="color: #800000;">@RequestScoped</span><span class="pln"><br/></span><span class="lit" style="color: #800000;">@TransactionAttribute</span><span class="pln"><br/></span><span class="kwd" style="color: #00008b;">public</span><span class="pln"> </span><span class="kwd" style="color: #00008b;">class</span><span class="pln"> </span><span class="typ" style="color: #2b91af;">GrupoEndpoint</span><span class="pln"><br/></span><span class="pun">{</span><span class="pln"><br/><br/>   </span><span class="lit" style="color: #800000;">@Context</span><span class="pln"><br/>   </span><span class="kwd" style="color: #00008b;">private</span><span class="pln"> </span><span class="typ" style="color: #2b91af;">HttpServletResponse</span><span class="pln"> response</span><span class="pun">;</span><span class="pln"><br/><br/>    </span><span class="lit" style="color: #800000;">@GET</span><span class="pln"><br/>    </span><span class="kwd" style="color: #00008b;">public</span><span class="pln"> </span><span class="typ" style="color: #2b91af;">List</span><span class="pun"><</span><span class="typ" style="color: #2b91af;">Grupo</span><span class="pun">></span><span class="pln"> listAll</span><span class="pun">()</span><span class="pln"><br/>    </span><span class="pun">{</span><span class="pln"><br/>        </span><span class="lit" style="color: #800000;">@SuppressWarnings</span><span class="pun">(</span><span class="str" style="color: #800000;">"unchecked"</span><span class="pun">)</span><span class="pln"><br/>        </span><span class="kwd" style="color: #00008b;">final</span><span class="pln"> </span><span class="typ" style="color: #2b91af;">List</span><span class="pun"><</span><span class="typ" style="color: #2b91af;">Grupo</span><span class="pun">></span><span class="pln"> results </span><span class="pun">=</span><span class="pln"> em</span><span class="pun">.</span><span class="pln">createQuery</span><span class="pun">(</span><span class="str" style="color: #800000;">"SELECT x FROM Grupo x"</span><span class="pun">).</span><span class="pln">getResultList</span><span class="pun">();</span><span class="pln"><br/>        </span><span class="com" style="color: gray;">// here response is null!!!</span><span class="pln"><br/>        response</span><span class="pun">.</span><span class="pln">addHeader</span><span class="pun">(</span><span class="str" style="color: #800000;">"Access-Control-Allow-Origin"</span><span class="pun">,</span><span class="pln"> </span><span class="str" style="color: #800000;">"*"</span><span class="pun">);</span><span class="pln"><br/>        response</span><span class="pun">.</span><span class="pln">addHeader</span><span class="pun">(</span><span class="str" style="color: #800000;">"Access-Control-Allow-Methods"</span><span class="pun">,</span><span class="pln"> </span><span class="str" style="color: #800000;">"GET, POST, OPTIONS"</span><span class="pun">);</span><span class="pln"><br/>        </span><span class="kwd" style="color: #00008b;">return</span><span class="pln"> results</span><span class="pun">;</span><span class="pln"><br/>    </span><span class="pun">}</span><span class="pln"><br/></span></code></pre><p style="margin-bottom: 1em; background-color: #ffffff; color: #000000; font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif;">But response is always null, is there something I might be missing?</p><p>Ps: I asked the same question on stackoverflow, in case you'd like to improve your SO reputation ;-)</p></div>
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