Error thrown when connecting to HTTPS REST endpoint with HTTP proxy in SwitchYard

Issue

• A SwitchYard Java bean calls this reference:

  <sca:reference name="QueryExampleService" multiplicity="0..1" promote="QueryRouteServiceBean/QueryExampleService">
    <sca:interface.java interface="com.example.app.QueryExampleService"></sca:interface>
    <resteasy:binding.rest name="QueryRest">
      <resteasy:messageComposer class="com.example.app.QueryComposer"></resteasy:messageComposer>
      <resteasy:interfaces>com.example.app.QueryExampleRestService</resteasy:interfaces>
      <resteasy:address>https://www.example.com/app/</resteasy:address>
      <resteasy:proxy>
        <resteasy:host>https://proxy.example.com</resteasy:host>
        <resteasy:port>3129</resteasy:port>
      </resteasy:proxy>
    </resteasy:binding.rest>
  </sca:reference>
  

• However, it fails with an exception when trying to connect to the https endpoint:

  Caused by: java.lang.IllegalStateException: Scheme 'http' not registered.
              at org.apache.http.conn.scheme.SchemeRegistry.getScheme(SchemeRegistry.java:71)
              at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:159)
              at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:294)
              at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:640)
              at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:479)
              at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
              at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:805)
              at org.jboss.resteasy.client.core.executors.ApacheHttpClient4Executor.execute(ApacheHttpClient4Executor.java:182) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
              at org.jboss.resteasy.core.interception.ClientExecutionContextImpl.proceed(ClientExecutionContextImpl.java:39) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
              at org.jboss.resteasy.plugins.interceptors.encoding.AcceptEncodingGZIPInterceptor.execute(AcceptEncodingGZIPInterceptor.java:40) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
              at org.jboss.resteasy.core.interception.ClientExecutionContextImpl.proceed(ClientExecutionContextImpl.java:45) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
              at org.jboss.resteasy.client.ClientRequest.execute(ClientRequest.java:443) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
              at org.jboss.resteasy.client.ClientRequest.httpMethod(ClientRequest.java:677) [resteasy-jaxrs-2.3.6.Final-redhat-1.jar:2.3.6.Final-redhat-1]
              at org.switchyard.component.resteasy.util.ClientInvoker.invoke(ClientInvoker.java:281) [switchyard-component-resteasy-1.1.1-p5-redhat-1.jar:1.1.1-p5-redhat-1]
              ... 394 more