try{
if("getPlugin".equals(action)){
PluginService pluginService = new PluginServiceImpl();
pluginService.getPluginXml(req, resp);
}else if("getStencilset".equals(action)){
StencilsetService stencilsetService = new StencilsetServiceImpl();
stencilsetService.getStencilsetJson(req, resp);
}else if("loadBPMNWeb".equals(action)){
WebModelService webModelService = new WebModelServiceImpl(req, resp);
webModelService.loadBPMNJson();
}else if("modelSave".equals(action)){
WebModelService webModelService = new WebModelServiceImpl(req, resp);