WL6.1sp3 problem with getServletContext?
I have just installed WL6.1sp3 and tried to move a web application from Tomcat
4.02 to WebLogic. When I access a jsp, I get the following compile error indicating
that it does not recognize the getServletContext method.
Can anyone tell me why this is happening and how I can fix this?
E:\WRS\WEB-INF\_tmp_war_WRS\jsp_servlet\__wrslogin.java:101: cannot resolve symbol
symbol : method getServletContext ()
location: class jsp_servlet.__wrslogin
String wrsDBLogin = getServletContext().getInitParameter("wrsDBLogin");
//[ /WRSLogin.jsp; Line: 12]
Thanks,
Chris
AFAIK there is no getServletContext() method in javax.servlet.Servlet.
change your JSP to
String wrsDBLogin =
getServletConfig().getServletContext().getInitParameter("wrsDBLogin");
or
String wrsDBLogin = application.getInitParameter("wrsDBLogin");
"Chris L" <[email protected]> wrote in message
news:[email protected]..
>
> I have just installed WL6.1sp3 and tried to move a web application from
Tomcat
> 4.02 to WebLogic. When I access a jsp, I get the following compile error
indicating
> that it does not recognize the getServletContext method.
>
> Can anyone tell me why this is happening and how I can fix this?
>
> E:\WRS\WEB-INF\_tmp_war_WRS\jsp_servlet\__wrslogin.java:101: cannot
resolve symbol
> symbol : method getServletContext ()
> location: class jsp_servlet.__wrslogin
> String wrsDBLogin =
getServletContext().getInitParameter("wrsDBLogin");
> //[ /WRSLogin.jsp; Line: 12]
>
>
>
> Thanks,
>
> Chris
Dimitri
Similar Messages
-
Problem with getServletContext().getRequestDispatcher(....).forward()
We are using the latest SJSWS 7.0U8, but have the following problem:
During GET requests, getServletContext().getRequestDispatcher(....).forward(req,resp) works fine. But if the client issues a HEAD request, the servlet crashes with a ClassCastException. This bug was known for older versions of Tomcat but is fixed there. Maybe the fix could be applied to SJSWS internal catilina engine, too?
Are there any idea to walk around that problem, but let HEAD request still produce the correct headers for such a request(file size,...)?
[17/Feb/2010:19:39:28] failure ( 9211): for host a.b.c.d trying to HEAD /xxxxx, service-j2ee reports: StandardWrapperValve[xxx]: PWC1406: Servlet.service() for servlet xxx threw exception
java.lang.ClassCastExceptionNo stack trace is logged, but some time in the past i printed a complete stack trace in a catch block and the reason for that is:
The default HEAD handler in the servlet uses NoBodyResponse to wrap the original ServletResponse. The code of forward() later tries to cast this response object to a standard HttpServetResponse, what it is not. Tomcat/Jetty have a fix for it (I do not know the bug number).
This happens now very often, as newer browsers like Chrome sometimes issue HEAD requests during page display (not sure why).Some more infos about the problem (the root cause is in the HttServlet.NoBodyResponse implementation in the Servlet Spec):
[https://issues.apache.org/bugzilla/show_bug.cgi?id=22290]
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Edited by: thetaphi on Feb 17, 2010 11:34 AM -
Problem with application server shutdown when connecting
Hi Friends,
I am new to J2EE applications.
I developed a web application that uses jxl and mysql for reading excel sheets. The host I am working on is supposed to be the server. The application I am running is working absolutely fine, by creating a directory and saving the excel file in my webapps folder and inserting the data to the database. But the minute I send the file from client system, there is a sudden shutdown in my server.
I am sending the jsp and java code related to this application and related log file..
I guess the main problem is with sending the exact path from the remote client, rest all is fine including excel and database interactions.
I commented the database interaction class just for now as I don't think there is a problem with it.
I am using Tomcat 4.1, MySQL 3.23
====================================================
JSP FILE
=====================================================
<%@ page language="java" import="pdss.*"%>
<html>
<head><title>File Upload</title></head>
<body>
<% String action=request.getParameter("go");
String message=request.getParameter("msg");
String str="";
if(message!=null)
str="Please enter valid filename!";
ExcelInteraction xlInt=new ExcelInteraction();
if(action==null)
%>
<center><font color="red"><%=str%></font></center>
<form name="myform" method="post">
<input type="file" name="filename"></input>
<input type="submit" name="go" value="Send">
</form>
<%
else if("send".equalsIgnoreCase(action))
String filename=request.getParameter("filename");
int ex=0;
System.out.println("************"+filename.endsWith(".xls"));
if(filename!=null && (filename.endsWith(".xls")))
ex=xlInt.fileTransfer(filename, getServletContext());
else if(filename==null || ("".equals(filename)) || filename.endsWith(".xls")==false)
response.sendRedirect("uploadFile.jsp?msg=a");
if(ex>0)
%> DONE
<% }
else
%> Data Inconsistency found
<% }
%>
</body>
</html>
======================================================
JAVA FILES
======================================================
ExcelInteraction:
package pdss;
import pdss.*;
import java.io.*;
import java.lang.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ExcelInteraction
//PDSSUtilities pdsUtil=new PDSSUtilities();
public int fileTransfer(String readFile, ServletContext app) throws Exception
int i=0, j=0;
String strDirectory = "pdssexcelfiles";
System.out.println("..............ReadFile..."+readFile);
File srcFile=new File(readFile);
System.out.println(".................Created source file."+srcFile.getAbsolutePath());
File destFile=null;
String newDirStr="",srcFileName="",destFileLoc="", realPath="";
try{
realPath=app.getRealPath("/");
System.out.println("newDirStr..........."+realPath);
newDirStr=realPath+strDirectory;
System.out.println("newDirStr..........."+newDirStr);
if((new File(newDirStr)).exists()==false)
boolean success = (new File(newDirStr)).mkdir();
System.out.println("....................success..."+success);
if (success) {
System.out.println(".................Directory...: " + strDirectory + " created");
srcFileName = srcFile.getName();
destFileLoc=newDirStr+"\\"+srcFileName;
System.out.println("DestFileLoc............"+destFileLoc);
if(srcFile.exists()){
destFile=new File(destFileLoc);
InputStream in = new FileInputStream(srcFile);
OutputStream out = new FileOutputStream(destFile);
byte[] buf = new byte[1024];
int len=0;
while ((len = in.read(buf)) > 0){
out.write(buf, 0, len);
in.close();
out.close();
System.out.println("............File copied to... "+destFile.getAbsolutePath());
System.out.println("......Closing Streams......");
/*if(destFile.exists())
j=pdsUtil.readXlData(destFileLoc);
System.out.println("..........j::"+j+"rows affected");
catch(Exception e)
e.printStackTrace();
System.exit(0);
return j;
=====================================================
LOG FILE FROM HOST SYSTEM:
=====================================================
2008-09-16 16:53:52 StandardContext[pdss]: Mapping contextPath='/pdss' with requestURI='/pdss/uploadFile.jsp' and relativeURI='/uploadFile.jsp'
2008-09-16 16:53:52 StandardContext[pdss]: Trying exact match
2008-09-16 16:53:52 StandardContext[pdss]: Trying prefix match
2008-09-16 16:53:52 StandardContext[pdss]: Trying extension match
2008-09-16 16:53:52 StandardContext[pdss]: Mapped to servlet 'jsp' with servlet path '/uploadFile.jsp' and path info 'null' and update=true
2008-09-16 16:54:01 StandardContext[pdss]: Mapping contextPath='/pdss' with requestURI='/pdss/uploadFile.jsp' and relativeURI='/uploadFile.jsp'
2008-09-16 16:54:01 StandardContext[pdss]: Trying exact match
2008-09-16 16:54:01 StandardContext[pdss]: Trying prefix match
2008-09-16 16:54:01 StandardContext[pdss]: Trying extension match
2008-09-16 16:54:01 StandardContext[pdss]: Mapped to servlet 'jsp' with servlet path '/uploadFile.jsp' and path info 'null' and update=true
=====================================================
LOG FILE FROM CLIENT SYSTEM:
2008-09-16 16:54:41 StandardContext[pdss]: Mapping contextPath='/pdss' with requestURI='/pdss/uploadFile.jsp' and relativeURI='/uploadFile.jsp'
2008-09-16 16:54:41 StandardContext[pdss]: Trying exact match
2008-09-16 16:54:41 StandardContext[pdss]: Trying prefix match
2008-09-16 16:54:41 StandardContext[pdss]: Trying extension match
2008-09-16 16:54:41 StandardContext[pdss]: Mapped to servlet 'jsp' with servlet path '/uploadFile.jsp' and path info 'null' and update=true
2008-09-16 16:54:42 StandardContext[pdss]: Stopping
2008-09-16 16:54:42 StandardContext[pdss]: Stopping filters
2008-09-16 16:54:42 StandardContext[pdss]: Processing standard container shutdown
2008-09-16 16:54:42 ContextConfig[pdss]: ContextConfig: Processing STOP
2008-09-16 16:54:42 StandardWrapper[pdss:jsp]: Waiting for 1 instance(s) to be deallocated
2008-09-16 16:54:42 StandardContext[pdss]: Sending application stop events
2008-09-16 16:54:42 StandardContext[pdss]: Stopping complete
=====================================================
Regards
VasumitraThe VERY FIRST message in the server log gives you a hint as to what the problem might be. The server thinks you have spaces in your PATH to the application server. Therefore, the solution is to kill the server however you need to (task manager, whatever) and then reinstall it in a path that doesn't contain spaces. That's the low-hanging fruit here; if that doesn't work, well, then we will have to find some other solution.
-
Hi All,
I'm developing a web application written in J2EE that uses Java Reporting Component (JRC) to display crystal reports from some filters recovered from a jsp and passed to a report .rpt previously designed and invoked just at runtime.
I have a problem with printing a PDF:
I want, after entering the filters in a jsp, to print a report in PDF format (WORD) without opening it
with Adobe Reader (Microsoft Word). The class of API JRC used for export is ReportExportControl.
Can anyone help me?
I wish a great day to You all.Hi Ted Ueda,
sorry for the delay of my answer.
I understand very well the problems related to security.
With the following code that I used to produce a report (PDF) at runtime,
is the PDF created on the server and then sent to the client, or is it directly created on the client as PDF
from RTF previously realized?
ReportExportControl exportControl = new ReportExportControl();
String report = report path;
ReportClientDocument reportClientDoc = new ReportClientDocument();
reportClientDoc.open(report, OpenReportOptions._openAsReadOnly);
Object reportSource = null;
reportSource = reportClientDoc.getReportSource();
//The method setConnectionProperties() stores all the connection parameters in the collection
//ConnectioInfos
ConnectionInfos connInfos = setConnectionProperties(request, reportClientDoc);
exportControl.setEnableLogonPrompt(false);
exportControl.setEnableParameterPrompt(false);
exportControl.setReportSource(reportSource);
exportControl.setDatabaseLogonInfos(connInfos);
//Single method to pass parameters to Crystal Reports. Using classes ParameterFieldController and
//ParameterFieldDiscreteValue
setReportParametersValue(reportClientDoc, reportParameters, subReportParameters);
ExportOptions exportOptions = new ExportOptions();
//Set the export format (PDF)
exportOptions.setExportFormatType(ReportExportFormat.PDF);
PDFExportFormatOptions PDFExpOpts = new PDFExportFormatOptions();
exportOptions.setFormatOptions(PDFExpOpts);
exportControl.setExportOptions(exportOptions);
exportControl.setExportAsAttachment(true);
try {
exportControl.getHtmlContent(request, response, getServletConfig().getServletContext());
} catch (ReportSDKExceptionBase e) {
throw new ApplicationException("error code", ": error message"); }
As, however, I predicted in my previous message about the direct printing on the client,
I read about ActiveX, but I don't know how to use them.
I read this information in the 'Crystal Reports for Eclipse Developer Guide' about "printMode" attribute:
"In ActiveX print mode, an ActiveX control is downloaded to the client machine and the report is send directly to the printer...."
The ActiveX alternative is a java applet that runs on the client and takes the pdf from the server and prints directly onto the clients through the commands that I used in the DOS command line:
1) AcroRd32.exe /p /h FILENAME
where
/p = print
/h = hide window
to print the report and
2) tkill AcroRd32
to close Adobe Reader, because it doesn't end automatically after printing and the command /h is used just to minimize the process.
I hope you can give me advice because I need to print directly on the client. Thank you -
Hello all,
I am making a simple HttpServlet, which takes input
from html page and saves in to a file, but I'm having a
bit of a problem with file permissions.
I'm getting the following exception
java.security.AccessControlException: access denied (java.io.FilePermission ./data/result read)
java.security.AccessControlContext.checkPermission(AccessControlContext.java:264)
java.security.AccessController.checkPermission(AccessController.java:427)
java.lang.SecurityManager.checkPermission(SecurityManager.java:532)
java.lang.SecurityManager.checkRead(SecurityManager.java:871)
java.io.File.exists(File.java:700)
SyksyHTTPServlet.doPost(SyksyHTTPServlet.java:31)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
sun.reflect.GeneratedMethodAccessor52.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
java.lang.reflect.Method.invoke(Method.java:585)
org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:243)
java.security.AccessController.doPrivileged(Native Method)
javax.security.auth.Subject.doAsPrivileged(Subject.java:517)
org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:275)
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exists or not.
The data directory has all permissions (read, write and execute) set for all users,
and I have made an empty file called result inside the data directory for testing.
This file has read and write permissions enabled for all users.
Here's my code
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.Enumeration;
import java.util.List;
import java.util.ArrayList;
public class SyksyHTTPServlet extends HttpServlet
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
int totalCount = 0;
List list;
String song = request.getParameter("song");
PrintWriter out = response.getWriter();
File file = new File("./data/result");
if(file.exists()) // this is line 31, which seems to cause the exception
list = readFile(file);
else
file.createNewFile();
list = new ArrayList();
list.add(song);
writeFile(file, list);
for(int i = 0 ; i < list.size() ; i++)
out.println(list.get(i));
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
doPost(request, response);
private List readFile(File file)
List list = null;
try
FileInputStream fis = new FileInputStream(file);
ObjectInputStream ois = new ObjectInputStream(fis);
list = (ArrayList)ois.readObject();
ois.close();
catch(Exception e)
e.printStackTrace();
return list;
private void writeFile(File file, List list)
try
FileOutputStream fos = new FileOutputStream(file);
ObjectOutputStream oos = new ObjectOutputStream(fos);
oos.writeObject(list);
oos.flush();
oos.close();
catch(Exception e)
e.printStackTrace();
}I'm using Tomcat 5.5 on Ubuntu Linux, if that has anything to do with this.
I'll appreciate all help.
kari-mattiHello again.
I'm still having problems with this. I made
a simple servlet that reads from and writes
to text file. The reading part work fine on my
computer, but the writing doesn't, not even
an exception is thrown if the file exists that
I'm trying to write to. If I try to create a new
file I'll get an exception about file permissions.
I also asked a friend of mine to try this same
servlet on his windows computer and it works
as it should.
Here's the code
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class ReadServlet extends HttpServlet
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
String s = "";
PrintWriter out = response.getWriter();
String docroot = getServletContext().getRealPath( "/" );
out.println("docroot: "+docroot);
File file = new File(docroot+"test.txt");
if(file.exists())
s = readFile(file);
out.println(s);
else
out.println("file not found");
//file.createNewFile(); // causes exception
//out.println("new file created.");
writeFile(file, "written by servlet");
out.println("Now look in the file "+file.getPath());
out.println("and see if it contains text 'written by servlet'");
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
doPost(request, response);
private String readFile(File file)
FileInputStream fis = null;
BufferedInputStream bis = null;
DataInputStream dis = null;
String s = "";
try
fis = new FileInputStream(file);
bis = new BufferedInputStream(fis);
dis = new DataInputStream(bis);
s = dis.readLine();
fis.close();
bis.close();
dis.close();
catch(Exception e)
e.printStackTrace();
return s;
private void writeFile(File file, String s)
FileOutputStream fos = null;
BufferedOutputStream bos = null;
DataOutputStream dos = null;
try
fos = new FileOutputStream(file);
bos = new BufferedOutputStream(fos);
dos = new DataOutputStream(bos);
dos.writeChars(s);
fos.flush();
bos.flush();
dos.flush();
fos.close();
bos.close();
dos.close();
catch(Exception e)
e.printStackTrace();
}And if someone wants to test this servlet I can
give a war package.
Any advices?
kari-matti -
Problem with getRequestDispatcher()
Hi,
I am trying to use my servlet to redirect the client to the previous page. The servlet is one that is used by so many JSP Pages in the application. I used a java beans inside (please don't laugh) the servlet to capture the page so then pass it to the getRequestDispatcher() as shown below in the code snipet.
RequestDispatcher dispatcher =
getServletContext().getRequestDispatcher(ttipsBeans.getpgeNameAddr());
dispatcher.forward(request, response);
Problem is: It doesn't work. It brings the client back to the same page. How can I achieve this?
Thanks
JosephThanks for your prompt response. That is exactly what I did with the other servlets that are called by EXACTLY ONE jsp page. Let me illustrate the problem with this scenario. Let's say I have userForm.jsp, travel.jsp, booking.jsp and vacation.jsp pages. Now all these jsp pages must use the userForm.jsp to collect user info. userForm.jsp on the other hand must call myServlet.class to send data to the database. Upon completion of its task it must redirect the client to EITHER travel.jsp, booking.jsp or vacation.jsp depending on which one invoked userForm.jsp. That is the reason why I used java beans to "remember" which page invoked userForm.jsp.
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Problem with mime type in web.xml file
Hi everybody,
I actually got a problem with mime types on Weblogic 6.0 under Linux.
I read the documentation so I added the next lines in the web.xml file in
the WEB-INF directory of my server :
<mime-mapping>
<extension>
doc
</extension>
<mime-type>
application/msword
</mime-type>
</mime-mapping>
<mime-mapping>
<extension>
ppt
</extension>
<mime-type>
application/vnd.ms-powerpoint
</mime-type>
</mime-mapping>
Why can't I retrieve a .doc or .ppt files with an internet browser correctly
? I get only text/plain ...
Can someone help me ?
Regards,
Alexis BergerI am having the same problem with doc and xsl. I have added this
<mime-mapping>
<extension>xls</extension>
<mime-type>application/vnd.ms-excel</mime-type>
</mime-mapping>
<mime-mapping>
<extension>doc</extension>
<mime-type>application/msword</mime-type>
</mime-mapping>
to my web.xml. I even restarted the server. I still see doc and xsl in binary.
Is there some other setting that needs to take place?
I am using WL6.1 with fixpack 1.
I can see the doc and excel files in the browser if I don't go through the weblogic
server. That just confirms it's not my browser.
Kumar Allamraju <[email protected]> wrote:
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<html>
It works fine for me in 6.1 SP1.
<br><br>
If the following doesn't work , can you
<br>try application/winword instead of application/msword?
<p>--
<br>Kumar
<p>Siming Mu wrote:
<blockquote TYPE=CITE>Hi,
<p>I setup in my web.xml a mime mapping as follows,
<p><mime-mapping>
<br><extension>doc</extension><mime-type>application/msword</mime-type>
<br></mime-mapping>
<p>When I specify a test.doc url, the doc file appears in my browser
as
binary data
<br>instead of download.
<p>Please reference change request 055002, which decribes this problem.
According
<br>to edocs, it has been fixed in wls6.1sp1.
<p>But I am seeing it fixed. Am I doing anything wrong? Thanks.
<p>Siming</blockquote>
</html> -
Is there a problem with ServletContext.getRealPath() in WebLogic? Seems it
always returns a path prefixed with \applications\DefaultWebApp_myserver,
regardless of the application where the jsp/servlet resides. And that's
only if you use a context based on the jsp/servlet. If you use
getServletConfig().getServletContext().getRealPath("/"), you get null.
Any thoughts?
Never mind; I found the answer in a posting to the
weblogic.developer.interest.servlet newsgroup from July.
"Lance Harris" <[email protected]> wrote in message
news:[email protected]..
> BTW: I'm running WebLogic 6.0sp2. getRealPath() works fine under 5.1
>
> "Lance Harris" <[email protected]> wrote in message
> news:3b9936a0$[email protected]..
> > Is there a problem with ServletContext.getRealPath() in WebLogic? Seems
it
> > always returns a path prefixed with
\applications\DefaultWebApp_myserver,
> > regardless of the application where the jsp/servlet resides. And that's
> > only if you use a context based on the jsp/servlet. If you use
> > getServletConfig().getServletContext().getRealPath("/"), you get null.
> >
> > Any thoughts?
> >
> >
> >
> >
> >
>
>
-
Problems with passing arguments to app
Hi.
I have a litle problem with passing arguments. I create a dynamic jnlp file using jsp. This is my code:
<%
response.setContentType("application/x-java-jnlp-file");
String l = request.getParameter("login");
String p = request.getParameter("pass");
out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
out.println("<jnlp spec=\"1.0+\" codebase=\"http://212.244.104.27:8080/PzP_INSTALL/\" href=\"pzp.jsp\">");
out.println("<information>");
out.println("<title>xxx</title>");
out.println("<vendor>xxxx</vendor>");
out.println("<homepage href=\"main.jsp\"/>");
out.println("<description>text</description>");
out.println("<offline-allowed/>");
out.println("</information>");
out.println("<security>");
out.println("<all-permissions/>");
out.println("</security>");
out.println("<resources>");
out.println("<j2se version=\"1.4+\"/>");
out.println("<jar href=\"jars/pzp.jar\" main=\"true\" download=\"eager\"/>");
out.println("<jar href=\"jars/config.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"jars/commons-beanutils.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"jars/commons-collections.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"jars/commons-digester.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"jars/commons-logging.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"jars/commons-validator.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"jars/easclient.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"jars/easj2ee.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"jars/jakarta-oro-2.0.7.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"jars/jbcl.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"jars/log4j-1.2.7.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"jars/jdom.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"jars/xercesImpl.jar\" main=\"false\" download=\"eager\"/>");
out.println("<property name =\"javaws.login \" " + "value=" + "\"" + l + "\"" + "/>");
out.println("<property name =\"javaws.pass \" " + "value=" + "\"" + p + "\"" + "/>");
out.println("</resources>");
out.println("<application-desc main-class=\"aaa.bbb.ccc.MyClass\"/>");
out.println("</jnlp>");
%>My problem is when i have the href tag filled, the arguments that i passed equlas null, when i remove the href everything is ok besides that the app doesnt show in application manager and doesnt create an icon on the desktop.
out.println("<jnlp spec=\"1.0+\" codebase=\"http://62.89.104.27:8080/PzP_INSTALL/\" href=\"pzp.jsp\">");
Any help would be appreciated.Hello again.
Thanks for your replay but unfortunetly it doesnt work too :-(
I've tried to use the out.println statemants in the servlet instead of using a jsp page but the error is the same. Please look at my code and tell me if you can what could be wrong.
This is the error message:
An error occurred while launching/running the application.
Title: PZP
Vendor: SPEED
Category: Download Error
Unable to load resource: http://212.89.104.27:8080/PzP_INSTALL/ServletPZP
Servlet code.
package pzp_install;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import pzp_install.LoginBean;
import javax.swing.JOptionPane;
public class ServletPZP extends HttpServlet {
public void init(ServletConfig config) throws ServletException {
super.init(config);
config.getServletContext().setAttribute("ServletPZP", this);
public void doPost(HttpServletRequest request, HttpServletResponse resp)
throws IOException {
PrintWriter out = resp.getWriter();
// Get the value of the request parameter
String login = request.getParameter("login");
String pass = request.getParameter("pass");
resp.setContentType("application/x-java-jnlp-file");
out.println("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
out.println("<jnlp spec=\"1.0+\" codebase=\"http://212.89.104.27:8080/PzP_INSTALL/\" href=\"/servletpzp\">");
out.println("<information>");
out.println("<title>PZP</title>");
out.println("<vendor>SPEED</vendor>");
out.println("<homepage href=\"main.jsp\"/>");
out.println("<description>Aplikacja wspomagajaca zarzadzanie zleceniami</description>");
out.println("<offline-allowed/>");
out.println("</information>");
out.println("<security>");
out.println("<all-permissions/>");
out.println("</security>");
out.println("<resources>");
out.println("<j2se version=\"1.4+\"/>");
out.println("<jar href=\"pzp.jar\" main=\"true\" download=\"eager\"/>");
out.println("<jar href=\"config.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"commons-beanutils.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"commons-collections.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"commons-digester.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"commons-logging.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"commons-validator.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"easclient.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"easj2ee.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"jakarta-oro-2.0.7.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"jbcl.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"log4j-1.2.7.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"jdom.jar\" main=\"false\" download=\"eager\"/>");
out.println("<jar href=\"xercesImpl.jar\" main=\"false\" download=\"eager\"/>");
out.println("<property name =\"javaws.login \" " + "value=" + "\"" + login + "\"" + "/>");
out.println("<property name =\"javaws.pass \" " + "value=" + "\"" + pass + "\"" + "/>");
out.println("</resources>");
out.println("<application-desc main-class=\"pl.speednet.pzp.PzP\"/>");
out.println("</jnlp>");
public void destroy() {
super.destroy();
This is the brief of code which starts the servlet
<form action="http://212.89.104.27:8080/PzP_INSTALL/servletpzp" method="post">
<input type="hide" name="login" value=<%=l%>>
<input type="hide" name="pass" value=<%=p%>>
<input type=submit value=Start PZP>
</form>
This is the web.xml file code.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
<servlet>
<servlet-name>ServletPZP</servlet-name>
<servlet-class>pzp_install.ServletPZP</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>ServletPZP</servlet-name>
<url-pattern>/servletpzp</url-pattern>
</servlet-mapping>
<mime-mapping>
<extension>jar</extension>
<mime-type>application/x-java-archive</mime-type>
</mime-mapping>
<mime-mapping>
<extension>jnlp</extension>
<mime-type>application/x-java-jnlp-file</mime-type>
</mime-mapping>
</web-app> -
Problems with Weblogic6.0 Under Linux
Hi,
I have been having this weird problem with weblogic 6.0 under linux.
I have WL6.0 installed on Redhat Linux 7.2 ( the 2.4 Kernel).
I start the WL server on Linux and my bean deploys successfully,
however I have a client bean on an NT box which tries to do a lookup
on the bean which resides on the Linux box.
I know that I get the initial context, because on the server side I
see the IP address being added to its client list , but as soon as I
try to do a lookup I get the error message
"Connection refused ..... etc....."
However , if I start the WL server on the NT box from where my client
bean resides, (and leave WL server running on Linux) everything works
fine , and I can reference the object.
This leads me to think that the following is happening :
The client actually connects the WL server on Linux looking for the
relevant stub classes etc.. but the WL server on Linux tells the
client to look for them else where , ie the machine from where it came
(in this case the NT machine)
This explains why when the WL server on NT is running all works fine ,
because the client goes back to the machine from where it came (NT
machine) and in this case the WL server is running so it can deal with
its requests !!
Running the client and server on Linux works fine and I can also run
the same code between NT machines and Solaris machines. As soon as I
introduce the Linux machine into the equation , I start getting this.
Any help , ideas would be greatly appreciated.
Thanks.Hi.
Strange. Please post the exception and the full stack trace here.
Thanks,
Michael
Zac Burke wrote:
Hi,
I have been having this weird problem with weblogic 6.0 under linux.
I have WL6.0 installed on Redhat Linux 7.2 ( the 2.4 Kernel).
I start the WL server on Linux and my bean deploys successfully,
however I have a client bean on an NT box which tries to do a lookup
on the bean which resides on the Linux box.
I know that I get the initial context, because on the server side I
see the IP address being added to its client list , but as soon as I
try to do a lookup I get the error message
"Connection refused ..... etc....."
However , if I start the WL server on the NT box from where my client
bean resides, (and leave WL server running on Linux) everything works
fine , and I can reference the object.
This leads me to think that the following is happening :
The client actually connects the WL server on Linux looking for the
relevant stub classes etc.. but the WL server on Linux tells the
client to look for them else where , ie the machine from where it came
(in this case the NT machine)
This explains why when the WL server on NT is running all works fine ,
because the client goes back to the machine from where it came (NT
machine) and in this case the WL server is running so it can deal with
its requests !!
Running the client and server on Linux works fine and I can also run
the same code between NT machines and Solaris machines. As soon as I
introduce the Linux machine into the equation , I start getting this.
Any help , ideas would be greatly appreciated.
Thanks.--
Developer Relations Engineer
BEA Support -
Form-based authentication problem with weblogic
Hi Everyone,
The following problem related to form-based authentication
was posted one week ago and no reponse. Can someone give it
a shot? One more thing is added here. When I try it on J2EE
server and do the same thing, I didn't encounter this error
message, and I am redirected to the homeage.
Thanks.
-John
I am using weblogic5.1 and RDBMSRealm as the security realm. I am having the following problem with the form-based authentication login mechanism. Does anyone have an idea what the problem is and how to solve it?
When I login my application and logout as normal procedure, it is OK. But if I login and use the browser's BACK button to back the login page and try to login as a new user, I got the following error message,
"Form based authentication failed. Could not find session."
When I check the LOG file, it gives me the following message,
"Form based authentication failed. One of the following reasons could cause it: HTTP sessions are disabled. An old session ID was stored in the browser."
Normally, if you login and want to relogin without logout first, it supposes to direct you to the existing user session. But I don't understand why it gave me this error. I also checked my property file, it appears that the HTTP sessions are enabled as follows,
weblogic.httpd.session.enable=trueHi...
Hehe... I actually did implement the way you implement it. My login.jsp actually checks if the user is authenticated. If yes, then it will forward it to the home page. On the other hand, I used ServletAuthentication to solve the problem mentioned by Cameron where Form Authentication Failed usually occurs for the first login attempt. I'm also getting this error occasionally. Using ServletAuthentication totally eliminates the occurence of this problem.
I'm not using j_security_check anymore. ServletAuthentication does all the works. It also uses RDBMSRealm to authenticate the user. I think the biggest disadvantage I can see when using ServletAuthentication is that the requested resource will not be returned after authentication cause the page returned after authenticating the user is actually hard coded (for my case, it's the home.jsp)
cheers...
Jerson
"John Wang" <[email protected]> wrote:
>
Hi Jerson,
I tried your code this weekend, it didn't work in my case. But
I solved my specific problem other way. The idea behind my problem is that the user tries to relogin when he already logs in. Therefore, I just redirect the user into another page when he is getting the login page by htting the BACK button, rather than reauthenticate the user as the way you did.
But, I think your idea is very helpful if it could work. Problems such multiple concurrence logins can be solved by pre-processing.
In your new code, you solved the problem with a new approach. I am just wondering, do you still implement it with your login.jsp file? In other word, your action in login.jsp is still "Authenticate"? Where do you put the URL "j_security_check"?
Thanks.
-John
"Jerson Chua" <[email protected]> wrote:
I've solved the problem by using ServletAuthentication. So far I'm not getting the error message. One of the side effects is that it doesn't return the requested URI after authentication, it will always return the home page.
Jerson
package com.cyberj.catalyst.web;
import weblogic.servlet.security.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class Authenticate extends HttpServlet {
private ServletAuthentication sa = new ServletAuthentication("j_username", "j_password");
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
int authenticated = sa.weak(request, response);
if (authenticated == ServletAuthentication.NEEDS_CREDENTIALS ||
authenticated == ServletAuthentication.FAILED_AUTHENTICATION) {
response.sendRedirect("fail_login.jsp");
} else {
response.sendRedirect("Home.jsp");
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
doPost(request, response);
"Jerson Chua" <[email protected]> wrote:
The problem is still there even if I use page redirection. Grrr... My boss wants me to solve this problem so what are the alternatives I can do? Are there any other ways of authenticating the user? In my web tier... I'm using isUserInRole, getRemoteUser and the web tier actually connects to EJBs. If I implement my custom authentication, I wouldn't be able to use this functionalities.
Has anyone solved this problem? I've tried the example itself and the same problem occurs.
Jerson
"Cameron Purdy" <[email protected]> wrote:
Jerson,
First try it redirected (raw) to see if that indeed is the problem ... then
if it works you can "fix" it the way you want.
Peace,
Cameron Purdy
Tangosol, Inc.
http://www.tangosol.com
+1.617.623.5782
WebLogic Consulting Available
"Jerson Chua" <[email protected]> wrote in message
news:[email protected]...
Hi...
Thanks for your suggestion... I've actually thought of that solution. Butusing page redirection will expose the user's password. I'm thinking of
another indirection where I will redirect it to another servlet but the
password is encrypted.
What do you think?
thanks....
Jerson
"Cameron Purdy" <[email protected]> wrote:
Maybe redirect to the current URL after killing the session to let the
request clean itself up. I don't think that a lot of the request (such
as
remote user) will be affected by killing the session until the nextrequest
comes in.
Peace,
Cameron Purdy
Tangosol, Inc.
http://www.tangosol.com
+1.617.623.5782
WebLogic Consulting Available
"Jerson Chua" <[email protected]> wrote in message
news:[email protected]...
Hello guys...
I've a solution but it doesn't work yet so I need your help. Because
one
of the reason for getting form base authentication failed is if an
authenticated user tries to login again. For example, the one mentionedby
John using the back button to go to the login page and when the user logsin
again, this error occurs.
So here's my solution
Instead of submitting the page to j_security_check, submit it to a
servlet
which will check if the user is logged in or not. If yes, invalidates its
session and forward it to j_security_check. But there's a problem in this
solution, eventhough the session.invalidate() (which actually logs theuser
out) is executed before forwarded to j_security_check, the user doesn't
immediately logged out. How did I know this, because after calling
session.invalidate, i tried calling request.RemoteUser() and it doesn't
return null. So I'm still getting the error. What I want to ask you guyis
how do I force logout before the j_security_check is called.
here's the code I did which the login.jsp actually submits to
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class Authenticate extends HttpServlet {
public void doPost(HttpServletRequest request, HttpServletResponseresponse)
throws ServletException, java.io.IOException {
if (request.getRemoteUser() != null) {
HttpSession session = request.getSession(false);
System.out.println(session.isNew());
session.invalidate();
Cookie[] cookies = request.getCookies();
for (int i = 0; i < cookies.length; i++) {
cookies.setMaxAge(0);
getServletContext().getRequestDispatcher("/j_security_check").forward(reques
t, response);
public void doGet(HttpServletRequest request, HttpServletResponseresponse)
throws ServletException, java.io.IOException {
doPost(request, response);
let's help each other to solve this problem. thanks.
Jerson
"Jerson Chua" <[email protected]> wrote:
I thought that this problem will be solved on sp6 but to my
disappointment, the problem is still there. I'm also using RDBMSRealm,same
as John.
Jerson
"Cameron Purdy" <[email protected]> wrote:
John,
1. You are using a single WL instance (i.e. not clustered) on that
NT
box
and doing so without a proxy (e.g. specifying http://localhost:7001),
correct?
2. BEA will pay more attention to the problem if you upgrade to SP6.If
you don't have a reason NOT to (e.g. a particular regression), then
you
should upgrade. That will save you one go-around with support: "Hi,I
am
on SP5 and I have a problem.", "Upgrade to SP6 to see if that fixes
it.
Call back if that doesn't work."
3. Make sure that you are not doing anything special before or after
J_SECURITY_CHECK ... make sure that you have everything configuredand
done
by the book.
4. Email BEA a bug report at [email protected] ... see what they say.
Peace,
Cameron Purdy
Tangosol, Inc.
http://www.tangosol.com
+1.617.623.5782
WebLogic Consulting Available
"John Wang" <[email protected]> wrote in message
news:[email protected]...
Cameron,
It seems to me that the problem I encountered is different a little
from
what you have, evrn though the error message is the same eventually.
Everytime I go through, I always get that error.
I am using weblogic5.1 and sp5 on NT4.0. Do you have any solutions
to
work
around this problem? If it was a BUG as you
pointed out, is there a way we can report it to the Weblogic
technical support and let them take a look?
Thnaks.
-John
"Cameron Purdy" <[email protected]> wrote:
John,
I will verify that I have seen this error now (after having read
about it
here for a few months) and it had the following characteristics:
1) It was intermittent, and appeared to be self-curing
2) It was not predictable, only seemed to occur at the first
login
attempt,
and may have been timing related
3) This was on Sun Solaris on a cluster of 2 Sparc 2xx's; the
proxy
was
Apache (Stronghold)
4) After researching the newsgroups, it appears that this "bug"
may
have gone away temporarily (?) in SP5 (although Jerson Chua
<[email protected]> mentioned that he still got it in SP5)
I was able to reproduce it most often by deleting the tmpwar and
tmp_deployments directories while the cluster was not running,
then
restarting the cluster. The first login attempt would fail(roughly
90%
of
the time?) and that server instance would then be ignored by the
proxy
for a
while (60 seconds?) -- meaning that the proxy would send all
traffic,
regardless of the number of "clients", to the other server in thecluster.
As far as I can tell, it is a bug in WebLogic, and probably has
been
there
for quite a while.
Peace,
Cameron Purdy
Tangosol, Inc.
http://www.tangosol.com
+1.617.623.5782
WebLogic Consulting Available
"John Wang" <[email protected]> wrote in message
news:[email protected]...
Hi Everyone,
The following problem related to form-based authentication
was posted one week ago and no reponse. Can someone give it
a shot? One more thing is added here. When I try it on J2EE
server and do the same thing, I didn't encounter this error
message, and I am redirected to the homeage.
Thanks.
-John
I am using weblogic5.1 and RDBMSRealm as the security realm. I
am
having
the following problem with the form-based authentication login
mechanism.
Does anyone have an idea what the problem is and how to solve it?
When I login my application and logout as normal procedure, it
is
OK.
But
if I login and use the browser's BACK button to back the login
page
and
try
to login as a new user, I got the following error message,
"Form based authentication failed. Could not find session."
When I check the LOG file, it gives me the following message,
"Form based authentication failed. One of the following reasons
could
cause it: HTTP sessions are disabled. An old session ID was stored
in
the
browser."
Normally, if you login and want to relogin without logout first,
it
supposes to direct you to the existing user session. But I don'tunderstand
why it gave me this error. I also checked my property file, it
appears
that
the HTTP sessions are enabled as follows,
weblogic.httpd.session.enable=true -
Hi All,
I am having a problem using runtime.exec()
in servlet to call a java file from the server.The server is a linux one and i am using a tomcat server-4.1.24 the server contains
some java files which i need to invoke with the help of the servlet program so i try to use exec() in servlet to invoke a particular java file in the server.The program is compiling well but no information
is displayed on the browser.Where in the servlet program i try to print the details of the particular java program that is in the server.For ur
reference i will post the code :-
import javax.servlet.http.*;
import javax.servlet.*;
import java.io.*;
public class ExeServlet extends HttpServlet
public void doGet(HttpServletRequest req,HttpServletResponse res)throws ServletException,IOException
try
String path = getServletContext().getRealPath("/var/jakarta/webapps/examples/WEB-INF/classes/ServletExample.java");
/*Where it is the path of the java file that resides in the server machine(linux)Which i want to invoke and print its details on the browser*/
Runtime runtime=Runtime.getRuntime();
Process proc=runtime.exec(path );
BufferedReader br=new BufferedReader(new InputStreamReader(proc.getInputStream()));
res.setContentType("text/html");
PrintWriter pw=res.getWriter();
pw.println("<b>");
String line=null;
while((line=br.readLine())!=null)
{ pw.println(line); //Displaying the details of the ServletExample.java file in the browser
pw.println("</b>");
catch (Exception e)
pw.println("Listener *not* started!");
What is the problem here?I was so frustrated with this.Pls. do provide an immediate reply if there is any code regarding this is working pls. do provide it.It is Urgent.I will be waiting for ur reply.
Thanx,
m.ananthuHi Leo,
Thank u for the reply i still have the problem with exec() in servlets.Has i said earlier in my previous mail by using exec() i trying to execute the output of a c-program for eg,Hello.run which provides an output of "HelloWorld" which is a sample eg.The Hello.run is the directory /var/jakarta/webapps/examples/WEB-INF/classes which is also the directory where my servlet program is.Where i am using a tomcat server-4.1.24 on the linux machine 7.3.Which is the server ofcourse.
Here by using a servlet program i try to exceute the Hello.run c-program and display the output in the browser.This is what i need to do.
I also used a sample core java class put the exec() there in a method and i try to call the method in the servlet.Which is also not working.
Here is that example :-
The core java program:-
public class UsingExec
public String ExeDisplay()
try
System.out.println("ExeDisplay");
Runtime rt=Runtime.getRuntime();
Process p=rt.exec("/var/jakarta/webapps/examples/WEB-INF/classes/Hello.run");
p.waitFor();
return "true";
catch(Exception e)
return "false";
public static void main(String args[])
UsingExec ue=new UsingExec();
ue.ExeDisplay();
When i run this program only ExeDisplay at the top is displayed.
Here is the Servlet program:-
import javax.servlet.http.*;
import javax.servlet.*;
import java.io.*;
public class ExeServlet extends HttpServlet
public void doGet(HttpServletRequest req,HttpServletResponse res)throws ServletException,IOException
try
res.setContentType("text/html");
PrintWriter pw=res.getWriter();
UsingExec ue=new UsingExec();
String line=ue.ExeDisplay();
pw.println(line);
catch (Exception e)
When i display this program on the browser only "false" is displayed from the UsingExec.java & nothing is displayed.
Thanx,
m.ananthu -
I am trying to implement some kind of a server listening for requests. The listener part of the app, is a daemon thread that listens for connections and instantiates a handling daemon thread once it gets some. However, my problem is that i must be able to kill the listening thread at the user's will (say via a sto button). I have done this via the Sun's proposed way, by testing a boolean flag in the loop, which is set to false when i wish to kill the thread. The problem with this thing is the following...
Once the thread starts excecuting, it will test the flag, find it true and enter the loop. At some point it will LOCK on the server socket waiting for connection. Unless some client actually connects, it will keep on listening indefinatelly whithought ever bothering to check for the flag again (no matter how many times you set the damn thing to false).
My question is this: Is there any real, non-theoretical, applied way to stop thread in java safely?
Thank you in advance,
LeftyThis was one solution from the socket programming forum, have you tried this??
public Thread MyThread extends Thread{
boolean active = true;
public void run(){
ss.setSoTimeout(90);
while (active){
try{
serverSocket = ss.accept();
catch (SocketTimeoutException ste){
// do nothing
// interrupt thread
public void deactivate(){
active = false;
// you gotta sleep for a time longer than the
// accept() timeout to make sure that timeout is finished.
try{
sleep(91);
}catch (InterruptedException ie){
interrupt();
} -
Problem with Threads and a static variable
I have a problem with the code below. I am yet to make sure that I understand the problem. Correct me if I am wrong please.
Code functionality:
A timer calls SetState every second. It sets the state and sets boolean variable "changed" to true. Then notifies a main process thread to check if the state changed to send a message.
The problem as far I understand is:
Assume the timer Thread calls SetState twice before the main process Thread runs. As a result, "changed" is set to true twice. However, since the main process is blocked twice during the two calls to SetState, when it runs it would have the two SetState timer threads blocked on its synchronized body. It will pass the first one, send the message and set "changed" to false since it was true. Now, it will pass the second thread, but here is the problem, "changed" is already set to false. As a result, it won't send the message even though it is supposed to.
Would you please let me know if my understanding is correct? If so, what would you propose to resolve the problem? Should I call wait some other or should I notify in a different way?
Thanks,
B.D.
Code:
private static volatile boolean bChanged = false;
private static Thread objMainProcess;
protected static void Init(){
objMainProcess = new Thread() {
public void run() {
while( objMainProcess == Thread.currentThread() ) {
GetState();
objMainProcess.setDaemon( true );
objMainProcess.start();
public static void initStatusTimer(){
if(objTimer == null)
objTimer = new javax.swing.Timer( 1000, new java.awt.event.ActionListener(){
public void actionPerformed( java.awt.event.ActionEvent evt){
SetState();
private static void SetState(){
if( objMainProcess == null ) return;
synchronized( objMainProcess ) {
bChanged = true;
try{
objMainProcess.notify();
}catch( IllegalMonitorStateException e ) {}
private static boolean GetState() {
if( objMainProcess == null ) return false;
synchronized( objMainProcess ) {
if( bChanged) {
SendMessage();
bChanged = false;
return true;
try {
objMainProcess.wait();
}catch( InterruptedException e ) {}
return false;
}Thanks DrClap for your reply. Everything you said is right. It is not easy to make them alternate since SetState() could be called from different places where the state could be anything else but a status message. Like a GREETING message for example. It is a handshaking message but not a status message.
Again as you said, There is a reason I can't call sendMessage() inside setState().
The only way I was able to do it is by having a counter of the number of notifies that have been called. Every time notify() is called a counter is incremented. Now instead of just checking if "changed" flag is true, I also check if notify counter is greater than zero. If both true, I send the message. If "changed" flag is false, I check again if the notify counter is greater than zero, I send the message. This way it works, but it is kind of a patch than a good design fix. I am yet to find a good solution.
Thanks,
B.D. -
Problem with threads running javaw
Hi,
Having a problem with multi thread programming using client server sockets. The program works find when starting the the application in a console using java muti.java , but when using javaw multi.java the program doesnt die and have to kill it in the task manager. The program doesnt display any of my gui error messages either when the server disconnect the client. all works find in a console. any advice on this as I havent been able to understand why this is happening? any comment would be appreciated.
troy.troy,
Try and post a minimum code sample of your app which
does not work.
When using javaw, make sure you redirect the standard
error and standard output streams to file.
Graeme.Hi Graeme,
I dont understand what you mean by redirection to file? some of my code below.
The code works fine under a console, code is supposed to exit when the client (the other server )disconnects. the problem is that but the clientworker side of the code still works. which under console it doesnt.
public class Server{
ServerSocket aServerSocket;
Socket dianosticsSocket;
Socket nPortExpress;
ClientListener aClientListener;
LinkedList queue = new LinkedList();
int port = 0;
int clientPort = 0;
String clientName = null;
boolean serverAlive = true;
* Server constructor generates a server
* Socket and then starts a client threads.
* @param aPort socket port of local machine.
public Server(int aPort, String aClientName, int aClientPort){
port = aPort;
clientName = aClientName;
clientPort = aClientPort;
try{
// create a new thread
aServerSocket = new ServerSocket(port) ;
// connect to the nPortExpress
aClientListener = new ClientListener(InetAddress.getByName(clientName), clientPort, queue,this);
// aClientListener.setDaemon(true);
aClientListener.start();
// start a dianostic port
DiagnosticsServer aDiagnosticsServer = new DiagnosticsServer(port,queue,aClientListener);
// System.out.println("Server is running on port " + port + "...");
// System.out.println("Connect to nPort");
catch(Exception e)
// System.out.println("ERROR: Server port " + port + " not available");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Server port " + port + " not available", JOptionPane.ERROR_MESSAGE);
serverAlive = false;
System.exit(1);
while(serverAlive&&aClientListener.hostSocket.isConnected()){
try{
// connect the client
Socket aClient = aServerSocket.accept();
//System.out.println("open client connection");
//System.out.println("client local: "+ aClient.getLocalAddress().toString());
// System.out.println("client localport: "+ aClient.getLocalPort());
// System.out.println("client : "+ aClient.getInetAddress().toString());
// System.out.println("client port: "+ aClient.getLocalPort());
// make a new client thread
ClientWorker clientThread = new ClientWorker(aClient, queue, aClientListener, false);
// start thread
clientThread.start();
catch(Exception e)
//System.out.println("ERROR: Client connection failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client connection failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end constructor Server
void serverExit(){
JOptionPane.showMessageDialog(null, "Server ","ERROR: nPort Failure", JOptionPane.ERROR_MESSAGE);
System.exit(1);
}// end class Server
*** connect to another server
public class ClientListener extends Thread{
InetAddress hostName;
int hostPort;
Socket hostSocket;
BufferedReader in;
PrintWriter out;
boolean loggedIn;
LinkedList queue; // reference to Server queue
Server serverRef; // reference to main server
* ClientListener connects to the host server.
* @param aHostName is the name of the host eg server name or IP address.
* @param aHostPort is a port number of the host.
* @param aLoginName is the users login name.
public ClientListener(InetAddress aHostName, int aHostPort,LinkedList aQueue,Server aServer) // reference to Server queue)
hostName = aHostName;
hostPort = aHostPort;
queue = aQueue;
serverRef = aServer;
// connect to the server
try{
hostSocket = new Socket(hostName, hostPort);
catch(IOException e){
//System.out.println("ERROR: Connection Host Failed");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort Failed", JOptionPane.ERROR_MESSAGE);
System.exit(0);
} // end constructor ClientListener
** multi client connection server
ClientWorker(Socket aSocket,LinkedList aQueue, ClientListener aClientListener, boolean diagnostics){
queue = aQueue;
addToQueue(this);
client = aSocket;
clientRef = aClientListener;
aDiagnostic = diagnostics;
} // end constructor ClientWorker
* run method is the main loop of the server program
* in change of handle new client connection as well
* as handle all messages and errors.
public void run(){
boolean alive = true;
String aSubString = "";
in = null;
out = null;
loginName = "";
loggedIn = false;
while (alive && client.isConnected()&& clientRef.hostSocket.isConnected()){
try{
in = new BufferedReader(new InputStreamReader(client.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(client.getOutputStream()));
if(aDiagnostic){
out.println("WELCOME to diagnostics");
broadCastDia("Connect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
out.println("WELCOME to Troy's Server");
broadCastDia("Connect : client "+client.getInetAddress().toString());
out.flush();
String line;
while(((line = in.readLine())!= null)){
StringTokenizer aStringToken = new StringTokenizer(line, " ");
if(!aDiagnostic){
broadCastDia(line);
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
else{
if(line.equals("GETIPS"))
getIPs();
else{
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
} // end while
catch(Exception e){
// System.out.println("ERROR:Client Connection reset");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR:Client Connection reset", JOptionPane.ERROR_MESSAGE);
try{
if(aDiagnostic){
broadCastDia("Disconnect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
broadCastDia("Disconnect : client "+client.getInetAddress().toString());
out.flush();
// close the buffers and connection;
in.close();
out.close();
client.close();
// System.out.println("out");
// remove from list
removeThreadQueue(this);
alive = false;
catch(Exception e){
// System.out.println("ERROR: Client Connection reset failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client Connection reset failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end method run
* method run - Generates io stream for communicating with the server and
* starts the client gui. Run also parses the input commands from the server.
public void run(){
boolean alive = true;
try{
// begin to life the gui
// aGuiClient = new ClientGui(hostName.getHostName(), hostPort, loginName, this);
// aGuiClient.show();
in = new BufferedReader(new InputStreamReader(hostSocket.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(hostSocket.getOutputStream()));
while (alive && hostSocket.isConnected()){
String line;
while(((line = in.readLine())!= null)){
System.out.println(line);
broadCast(line);
} // end while
} // end while
catch(Exception e){
// System.out.println("ERRORa Connection to host reset");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort reset", JOptionPane.ERROR_MESSAGE);
try{
hostSocket.close();
}catch(Exception a){
JOptionPane.showMessageDialog(null, (a.toString()),"ERROR: Exception", JOptionPane.ERROR_MESSAGE);
alive = false;
System.exit(1);
} // end method run
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