I suggest you need to use your "<servlet-name>" to invoke your Servlet if you want to use your "<init-param>", it will force your "<init-param>" to be included, for example: http://xxx.xxx.xxx.xxx:8080/myapp/servlet/remoteServlet
if you use your "Servlet class name" to invoke your Servlet, for example: http://xxx.xxx.xxx.xxx:8080/myapp/servlet/ch.hephaistos.web.RemoteServlet now (I only have tried TC4.0), the "default Servlet-declaration(instance)" of your Servlet class will be invoked, which doesn't include your "<init-param>" if you include the <load-on-startup> tag, now I guess because it will force your Servlet engineer Not to use the "default Servlet-declaration(instance)", so you can get the "<init-param>" Bo Oct.01, 2001 Alessandro Di Maria wrote: > Hello! > > I have some problems to read the init-parameters for my servlet. > > I'm usign tomcat 3.2.3, mod-jk. But tested with tomcat standalone on > port 8080. > > Here's my web.xml, located on TOMCAT_HOME/webapps/test/WEB-INF/ > > <web-app> > <servlet> > <servlet-name>remoteServlet</servlet-name> > <servlet-class>ch.hephaistos.web.RemoteServlet</servlet-class> > > <init-param> > <param-name>server-host</param-name> > <param-value>localhost</param-value> > </init-param> > <init-param> > <param-name>server-name</param-name> > <param-value>ServletServer</param-value> > </init-param> > <init-param> > <param-name>timeout</param-name> > <param-value>80000</param-value> > </init-param> > <load-on-startup>5</load-on-startup> > </servlet> > </web-app> > > if I don't include the <load-on-startup> tag the init-param will never > be read ! > > and here's a snippet of my servlet code: > > public class RemoteServlet extends HttpServlet implements RRemoteServlet { > > private String serverHost="localhost"; > > private String severName="ServletServer"; > > private RServletServer server; > > private int timeout=60000; > > private static int count=0; > > private int number; > > public void init(ServletConfig config) throws ServletException { > super.init(config); > processes = new Hashtable(5); > > // config Log4J > String prefix = > this.getServletContext().getRealPath("/WEB-INF/conf/"); > Log.loadConfig(prefix+"log4j.lcf"); > Log.log.debug("Log4J configuration laoded"); > > // load configuration > serverHost = config.getInitParameter("server-host"); > Log.web.info("Remote Host: "+serverHost); > severName = config.getInitParameter("server-name"); > Log.web.info("Server Name: "+severName); > String timeoutInit = config.getInitParameter("timeout"); > try{ > timeout = Integer.parseInt(timeoutInit); > } catch (NumberFormatException nfe){ > timeout = 60000; > } > Log.web.info("Timeout: "+timeout); > > > // test only use DEBUG-Mode > count++; > Log.web.debug("Servlet Instance Nr."+count); > number=count; > Log.web.debug("Servlet Nr."+number); > > // prepare Servlet for callbacks > try{ > UnicastRemoteObject.exportObject(this); > } catch(RemoteException re){ > re.printStackTrace(); > } > this.lookup(serverHost,severName); > try{ > this.server.register(this); > Log.rmi.info("Servlet registred to "+severName); > } catch (RemoteException re){ > Log.rmi.fatal("Register to ["+severName+"] failed!",re); > } > } > > Here the output I get from Tomcat: > > 2001-10-01 11:56:46 - ContextManager: Adding context Ctx( /test ) > 0 DEBUG [main] hephaistos.log init - Log4J configuration laoded > 21 INFO [main] hephaistos.web init - Remote Host: localhost > 21 INFO [main] hephaistos.web init - Server Name: ServletServer > 21 INFO [main] hephaistos.web init - Timeout: 80000 > 21 DEBUG [main] hephaistos.web init - Servlet Instance Nr.1 > 21 DEBUG [main] hephaistos.web init - Servlet Nr.1 > 241 INFO [main] hephaistos.rmi init - Servlet registred to ServletServer > 2001-10-01 11:56:47 - PoolTcpConnector: Starting HttpConnectionHandler > on 8080 > 2001-10-01 11:56:47 - PoolTcpConnector: Starting Ajp12ConnectionHandler > on 8007 > 9594 DEBUG [Thread-21] hephaistos.log init - Log4J configuration laoded > 9594 INFO [Thread-21] hephaistos.web init - Remote Host: null > 9594 INFO [Thread-21] hephaistos.web init - Server Name: null > 9594 INFO [Thread-21] hephaistos.web init - Timeout: 60000 > 9594 DEBUG [Thread-21] hephaistos.web init - Servlet Instance Nr.2 > 9594 DEBUG [Thread-21] hephaistos.web init - Servlet Nr.2 > 11868 ERROR [Thread-21] hephaistos.rmi lookup - Lookup for [null] failed! > java.rmi.UnknownHostException: Unknown host: null; nested exception is: > java.net.UnknownHostException: null > java.net.UnknownHostException: null > at java.net.InetAddress.getAllByName0(InetAddress.java:571) > ..... > > Thread [main] is launched on tomcat's startup, Thread [21] on the first > request for this servlet. > > I don't understand why tomcat has initialized another intance of the > servlet, he does it for every new request. > If I don't read any init-params tomcat only uses one instance, even if I > would implement the SingleThreadModel. > > What's wrong here?! > > Alessandro Di Maria
