ServletContextInitializer Class Reference

Inheritance diagram for ServletContextInitializer:

Collaboration diagram for ServletContextInitializer:

Public Member Functions
void	contextInitialized (ServletContextEvent sce)
void	contextDestroyed (ServletContextEvent sce)

Static Public Member Functions
static boolean	initConfiguration (ServletContext context)

Static Public Attributes
static final String	SERVER_CONFIGURATION
static final String	ERROR_MESSAGE

Static Private Member Functions
static void	log (Exception ex, ServletContext context)

Private Attributes
ScheduledExecutorService	scheduler

Member Function Documentation

contextDestroyed()

void contextDestroyed

(

ServletContextEvent

sce

)

                                                              {
                // Do nothing special.
        }

contextInitialized()

void contextInitialized

(

ServletContextEvent

sce

)

                                                                {
                final ServletContext context = sce.getServletContext();
                Boolean result=ServletContextInitializer.initConfiguration(context);
                /*if(!result) {
                        Configuration config=(Configuration) context.getAttribute(SERVER_CONFIGURATION);
                        String error=context.getAttribute(ERROR_MESSAGE).toString();
                        scheduler=Executors.newSingleThreadScheduledExecutor();
                        scheduler.scheduleAtFixedRate(new Reloader(config,error,context.getInitParameter("config-file"),context.getRealPath("/")), 3000, 30000, TimeUnit.SECONDS);                      
                }*/
        }

References ServletContextInitializer.initConfiguration().

initConfiguration()

static boolean initConfiguration ( ServletContext  context )

static

                                                                       {
                System.out.println("Called init configuration!");
            try {
                        String configFileName = context.getInitParameter("config-file");
                        if (configFileName == null) {
                                throw new ConfigurationException("Missing context parameter \"config-file\" in /WEB-INF/web.xml");
                        }
                        File configFile = new File(configFileName);
                        if (!configFile.isAbsolute()) {
                                configFile = new File(context.getRealPath("/") + "/WEB-INF/" + configFileName);
                        }
                        String url = configFile.getAbsoluteFile().toURI().toString();
                        System.out.println("SPARQL Endpoint: "+url);
                        try {
                                //System.out.println("Resetting cache...");
                                //FileManager.get().resetCache();
                                System.out.println("Loading model...");
                                Model m = RDFDataMgr.loadModel(url);
                                System.out.println("Creating configuration...");
                                Configuration conf = Configuration.create(m);
                                System.out.println("Saving configuration...");
                                context.setAttribute(SERVER_CONFIGURATION, conf);
                                System.out.println("Got new server configuration!");
                        } catch (JenaException ex) {
                                ex.printStackTrace();
                            if(ex.getCause()!=null){
                                                                throw new ConfigurationException(
                                                "Error parsing configuration file <" + url + ">: " + 
                                                ex.getMessage()+"\nCause: "+ex.getCause().getMessage());
                                        
                            }else{
                                StringWriter sw = new StringWriter();
                    PrintWriter pw = new PrintWriter(sw);
                    ex.printStackTrace(pw);
                                throw new ConfigurationException(
                                                "Error parsing configuration file <" + url + ">: " + 
                                                ex.getMessage()+"\n"+sw.toString());                            
                            }
 
                        }
                } catch (ConfigurationException ex) {
                        System.out.println(ex.getMessage());
                        log(ex, context);
                        return false;
                }
                return true;
        }

References Configuration.create(), ServletContextInitializer.log(), and ServletContextInitializer.SERVER_CONFIGURATION.

Referenced by ServletContextInitializer.contextInitialized(), and BaseServlet.doGet().

log()

static void log ( Exception  ex, ServletContext  context  )

staticprivate

                                                                      {
                context.log("######## PUBBY CONFIGURATION ERROR ######## ");
                context.log(ex.getMessage());
                context.log("########################################### ");
                context.setAttribute(ERROR_MESSAGE, ex.getMessage());
        }

References ServletContextInitializer.ERROR_MESSAGE.

Referenced by ServletContextInitializer.initConfiguration().

Member Data Documentation

ERROR_MESSAGE

final String ERROR_MESSAGE

static

Initial value:

=
                        ServletContextInitializer.class.getName() + ".errorMessage"

Referenced by BaseServlet.doGet(), BaseServlet.init(), and ServletContextInitializer.log().

scheduler

ScheduledExecutorService scheduler

private

SERVER_CONFIGURATION

final String SERVER_CONFIGURATION

static

Initial value:

=
                        ServletContextInitializer.class.getName() + ".serverConfiguration"

Referenced by BaseServlet.doGet(), BaseServlet.init(), and ServletContextInitializer.initConfiguration().