@Override
  public void deploy(DeploymentPhaseContext phaseContext) throws DeploymentUnitProcessingException {
    final DeploymentUnit deploymentUnit = phaseContext.getDeploymentUnit();

    if (!JaxrsDeploymentMarker.isJaxrsDeployment(deploymentUnit)) {
      return;
    }

    if (!DeploymentTypeMarker.isType(DeploymentType.WAR, deploymentUnit)) {
      return;
    }

    final DeploymentUnit parent =
        deploymentUnit.getParent() == null ? deploymentUnit : deploymentUnit.getParent();
    final WarMetaData warMetaData = deploymentUnit.getAttachment(WarMetaData.ATTACHMENT_KEY);
    final JBossWebMetaData webdata = warMetaData.getMergedJBossWebMetaData();

    final ResteasyDeploymentData resteasy =
        deploymentUnit.getAttachment(JaxrsAttachments.RESTEASY_DEPLOYMENT_DATA);

    if (resteasy == null) return;

    // remove the resteasy.scan parameter
    // because it is not needed
    final List<ParamValueMetaData> params = webdata.getContextParams();
    if (params != null) {
      Iterator<ParamValueMetaData> it = params.iterator();
      while (it.hasNext()) {
        final ParamValueMetaData param = it.next();
        if (param.getParamName().equals(RESTEASY_SCAN)) {
          it.remove();
        } else if (param.getParamName().equals(RESTEASY_SCAN_RESOURCES)) {
          it.remove();
        } else if (param.getParamName().equals(RESTEASY_SCAN_PROVIDERS)) {
          it.remove();
        }
      }
    }

    final Map<ModuleIdentifier, ResteasyDeploymentData> attachmentMap =
        parent.getAttachment(JaxrsAttachments.ADDITIONAL_RESTEASY_DEPLOYMENT_DATA);
    final List<ResteasyDeploymentData> additionalData = new ArrayList<ResteasyDeploymentData>();
    final ModuleSpecification moduleSpec =
        deploymentUnit.getAttachment(Attachments.MODULE_SPECIFICATION);
    if (moduleSpec != null && attachmentMap != null) {
      final Set<ModuleIdentifier> identifiers = new HashSet<ModuleIdentifier>();
      for (ModuleDependency dep : moduleSpec.getAllDependencies()) {
        // make sure we don't double up
        if (!identifiers.contains(dep.getIdentifier())) {
          identifiers.add(dep.getIdentifier());
          if (attachmentMap.containsKey(dep.getIdentifier())) {
            additionalData.add(attachmentMap.get(dep.getIdentifier()));
          }
        }
      }
      resteasy.merge(additionalData);
    }
    if (!resteasy.getScannedResourceClasses().isEmpty()) {
      StringBuffer buf = null;
      for (String resource : resteasy.getScannedResourceClasses()) {
        if (buf == null) {
          buf = new StringBuffer();
          buf.append(resource);
        } else {
          buf.append(",").append(resource);
        }
      }
      String resources = buf.toString();
      JAXRS_LOGGER.debugf("Adding JAX-RS resource classes: %s", resources);
      setContextParameter(webdata, ResteasyContextParameters.RESTEASY_SCANNED_RESOURCES, resources);
    }
    if (!resteasy.getScannedProviderClasses().isEmpty()) {
      StringBuffer buf = null;
      for (String provider : resteasy.getScannedProviderClasses()) {
        if (buf == null) {
          buf = new StringBuffer();
          buf.append(provider);
        } else {
          buf.append(",").append(provider);
        }
      }
      String providers = buf.toString();
      JAXRS_LOGGER.debugf("Adding JAX-RS provider classes: %s", providers);
      setContextParameter(webdata, ResteasyContextParameters.RESTEASY_SCANNED_PROVIDERS, providers);
    }

    if (!resteasy.getScannedJndiComponentResources().isEmpty()) {
      StringBuffer buf = null;
      for (String resource : resteasy.getScannedJndiComponentResources()) {
        if (buf == null) {
          buf = new StringBuffer();
          buf.append(resource);
        } else {
          buf.append(",").append(resource);
        }
      }
      String providers = buf.toString();
      JAXRS_LOGGER.debugf("Adding JAX-RS jndi component resource classes: %s", providers);
      setContextParameter(
          webdata, ResteasyContextParameters.RESTEASY_SCANNED_JNDI_RESOURCES, providers);
    }

    if (!resteasy.isUnwrappedExceptionsParameterSet()) {
      setContextParameter(
          webdata,
          ResteasyContextParameters.RESTEASY_UNWRAPPED_EXCEPTIONS,
          "javax.ejb.EJBException");
    }

    if (resteasy.hasBootClasses() || resteasy.isDispatcherCreated()) return;

    boolean useScannedClass = false;
    String servletName;
    if (resteasy.getScannedApplicationClass() == null) {
      // if there is no scanned application we must add a servlet with a name of
      // javax.ws.rs.core.Application
      JBossServletMetaData servlet = new JBossServletMetaData();
      servlet.setName(JAX_RS_SERVLET_NAME);
      servlet.setServletClass(HttpServlet30Dispatcher.class.getName());
      servlet.setAsyncSupported(true);
      addServlet(webdata, servlet);
      servletName = JAX_RS_SERVLET_NAME;

    } else {
      if (servletMappingsExist(webdata, JAX_RS_SERVLET_NAME)) {
        throw new DeploymentUnitProcessingException(MESSAGES.conflictUrlMapping());
      }

      // now there are two options.
      // if there is already a servlet defined with an init param
      // we don't do anything.
      // Otherwise we install our filter
      // JAVA-RS seems somewhat confused about the difference between a context param
      // and an init param.
      ParamValueMetaData param = findInitParam(webdata, SERVLET_INIT_PARAM);
      if (param != null) {
        // we need to promote the init param to a context param
        servletName = param.getParamValue();
        setContextParameter(webdata, "javax.ws.rs.Application", servletName);
      } else {
        ParamValueMetaData contextParam = findContextParam(webdata, "javax.ws.rs.Application");
        if (contextParam == null) {
          setContextParameter(
              webdata, "javax.ws.rs.Application", resteasy.getScannedApplicationClass().getName());
          useScannedClass = true;
          servletName = resteasy.getScannedApplicationClass().getName();
        } else {
          servletName = contextParam.getParamValue();
        }
      }
    }

    boolean mappingSet = false;

    if (useScannedClass) {

      // look for servlet mappings
      if (!servletMappingsExist(webdata, servletName)) {
        // no mappings, add our own
        List<String> patterns = new ArrayList<String>();
        if (resteasy.getScannedApplicationClass().isAnnotationPresent(ApplicationPath.class)) {
          ApplicationPath path =
              resteasy.getScannedApplicationClass().getAnnotation(ApplicationPath.class);
          String pathValue = path.value().trim();
          if (!pathValue.startsWith("/")) {
            pathValue = "/" + pathValue;
          }
          String prefix = pathValue;
          if (pathValue.endsWith("/")) {
            pathValue += "*";
          } else {
            pathValue += "/*";
          }
          patterns.add(pathValue);
          setContextParameter(webdata, "resteasy.servlet.mapping.prefix", prefix);
          mappingSet = true;
        } else {
          JAXRS_LOGGER.noServletMappingFound(servletName);
          return;
        }
        ServletMappingMetaData mapping = new ServletMappingMetaData();
        mapping.setServletName(servletName);
        mapping.setUrlPatterns(patterns);
        if (webdata.getServletMappings() == null) {
          webdata.setServletMappings(new ArrayList<ServletMappingMetaData>());
        }
        webdata.getServletMappings().add(mapping);
      }

      // add a servlet named after the application class
      JBossServletMetaData servlet = new JBossServletMetaData();
      servlet.setName(servletName);
      servlet.setServletClass(HttpServlet30Dispatcher.class.getName());
      servlet.setAsyncSupported(true);
      addServlet(webdata, servlet);
    }

    if (!mappingSet) {
      // now we need tell resteasy it's relative path
      final List<ServletMappingMetaData> mappings = webdata.getServletMappings();
      if (mappings != null) {
        for (final ServletMappingMetaData mapping : mappings) {
          if (mapping.getServletName().equals(servletName)) {
            if (mapping.getUrlPatterns() != null) {
              for (String pattern : mapping.getUrlPatterns()) {
                if (mappingSet) {
                  JAXRS_LOGGER.moreThanOneServletMapping(servletName, pattern);
                } else {
                  mappingSet = true;
                  String realPattern = pattern;
                  if (realPattern.endsWith("*")) {
                    realPattern = realPattern.substring(0, realPattern.length() - 1);
                  }
                  setContextParameter(webdata, "resteasy.servlet.mapping.prefix", realPattern);
                }
              }
            }
          }
        }
      }
    }
  }