How To Show Tomcat Website On Different HTTPListener / Thread
May 23, 2014
I'm creating a java-web project inside tomcat. (Tomcas starts a servlet that starts a counter application pased on GPIO states). In there is a web-interface that is showing the counter and some other informaition. On the web interface there is also a configuration form where the client can set some names/backupintervall/counterDelay etc...
Only i run tomcat on a port 8045. Setting up by the tomcat xml. But what i want is a second port threat that listen to a port (given by properties file like: webport-second=4302). That threat must show the same information that i get from tomcat port 8045. Like a redirection to that port but without browser redirect.
convert or move standalone java thread application into Tomcat server container for accessing its JNDI services? Also is it possible to schedule this thread application in Tomcat server? is it possible to keep this app in tomcat as web application and schedule in window's scheduler.
I'm currently learning about Swing but I can't get my head round this piece of the code. Here is a simplified gui (not interested in the gui part but the execution)
public class SwingDemo implements ActionListener { SwingDemo(){ JFrame jfrm = new JFrame("Simple gui pro"); //rest of code public static void main(String[] args) { new SwingDemo(); }
I get the above, create a new instance of SwingDemo in the main thread which starts up the gui through the constructor. However, then the tutorial says that I should avoid doing the above but do this instead:
public class SwingDemo implements ActionListener { SwingDemo(){ JFrame jfrm = new JFrame("Simple gui pro"); //rest of code public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { //why do this instead? public void run(){ new SwingDemo(); } }); } }
Reading, it talks about an event-dispatching thread which has completely lost me... Why not just instantiate the object directly instead of creating another thread?
im having an issue with the 3rd thread that are supposed to merge the two sorted sub arrays , i pass the 2 subarrays to my runnable function sortlist and they are renamed IntSortList 1 and 2 and th1.start() and th1.join() are called and it works fine, but then i have another runnable constructor that takes IntSortList 1 and 2 but it does take a runnable. below is the code in my main,
Runnable InSortlist1 = new sortList(data2p1); Runnable InSortlist1 = new sortList(data2p1); Thread th1 = new Thread (IntSortlist1); Thread th2 = new Thread (IntSortlist2); try { th1.start(); th1.join();
class A { List<StringBuilder> list; public void output(List<StringBuilder> objectToOutput){ try(BufferedWriter bw = new BufferedWriter(new FileWriter("temp.txt"))){ for(StringBuilder row:objectToOutput) bw.write(row.toString()); }catch(IOException e){}
[code]....
Why don't the a's show up on the console? I put them in as part of the debugging process and now I don't understand why they don't show up in both places.
I moved some static html pages I was hosting from apache into tomcat. (no point in running two servers) This works as expected, but I'm having trouble with the authentication part. In apache the authentication was handled by htaccess. I tried various tutorials on the web about configuring basic authentication in tomcat using WEB-INF/web.xml in tomcat, but I'm not sure this approach applies to static html pages. Using basic authentication for static html in tomcat?
I am trying to make a simple login using netbeans, derby database included in netbeans and tomcat server. I made everything nice and separated: I have a model package with a class called DbConnector that has the following method:
Then i have another class, an userDAODB that has a password check method:
public boolean checkPassword(String user, String password) { try (Connection con = new DbConnector().connect(); Statement stmt = con.createStatement()) { //checks the password in the database
In the main method of this class i tested everything, it works very nice, logs me in, other methods work too, no problem what so ever.But then i go to my servlet:
public class LoginTest extends HttpServlet { public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { String username = request.getParameter("username"); String pass = request.getParameter("pass"); UserDAODB userDAO = new UserDAODB(); boolean authe = userDAO.checkPassword(username, pass);
[code]....
So when i start the webpage and i try to click on the login button I get a NullPointerException com.model. UserDAODB. check Password (User DAODB. java:14) - so line 2 here
I have been googling a bit, i placed the derby.jar and the derbyclient.jar in the lib directory of tomcat, i tried to modify the context.xml of my application, but then it wouldn't even start anymore.
I am using RAD and I copied the Tomcat server from server to local folder. Then I tried to add this tomcat by adding new server. I got the error in title. After searching, I copied the Tomcatconf files to myworkspaceserver omcat at localhost-config, restart RAD and refresh. But now I am getting the error that the conf may corrupted or incomplete.
It works in the first time. But, after sometime the data is not retrieved and display empty screen. Once, i stop and start the server again, the data is getting retrieved again. But, later when we refresh the empty page is getting displayed again.
We have a website used for downloading large files as large as 6gb and sometimes larger. We have all files in FTP server. The websit is JSP/Servlet /Tomcat combination. Below is code sample. I need a solution to increase the download speed. I understand it is bound to network bandwidth but are the steps that we need to take while we have such large files.I read about multipart downloads,gunzip streaming.
//first connect to FTP server and login and keep connection Calendar cal=Calendar.getInstance(); startTime=cal.getTime(); fis=ftp.downloadFile(ftpclient,separator+resourceID); response.setContentType("application/*"); response.setHeader("Content-Disposition", "attachment; filename="" + downloadFileName + "";"); byte[] bytes = new byte[1024];
Currently we are facing a problem in application developed in JSF, Hibernate on Tomcat server 7. The UI is getting freezed after uncertain time. Sometimes it worked for 2 to 5 hours and sometimes it hangs out within 10 mins, too.
Session time out in web.xml is -1
Before, we were getting memory leak logs in catalina, so we implemented ClassLoaderLeakPreventor in the application. When problem occurs, below log is printing in catalina.out.
INFO: Reloading context [/SHRWeb241213] Jan 31, 2014 12:42:36 PM org.apache.catalina.core.StandardContext reload INFO: Reloading Context with name [/SHRWeb241213] has started ClassLoaderLeakPreventor: com.cosmos.leakPrevention.ClassLoaderLeakPreventor shutting down context by removing known leaks (CL: 0x19a37a) ClassLoaderLeakPreventor: Removing 47 classes from Mojarra descriptors cache
I have a simple application ( only 2 JSPs files and one servlet the main components the whole webapp directory is attached ), I am using security constraint to redirect the user to HTTPS instead of HTTP when he submit from first page to the second page.
The problem is when the user submit the first page I get the error HTTP Status 405 - HTTP method GET is not supported by this URL although I m using only POST.
I have traced the firefox browser using httpfox and the result was the first HTTP request was done using POST correctly but after redirect the browser send GET.
This problem appears with FireFOx and IE but doesnot appear with google chrome.
I keep getting this error when compiling the code . I think its got to do with the Tomcat server not working well with the textpad app...I'm using windows 8.1(for the course I have to use Textpad 4.7.3 & Apache Tomcat 5.5.7 Server) :
C:UsersReignDownloadsIntec - Codecourse technology59850dChapter 12WorkWebStocks.java:20: package javax.servlet does not exist import javax.servlet.*; ^ C:UsersReignDownloadsIntec - Codecourse technology59850dChapter 12WorkWebStocks.java:21: package javax.servlet.http does not exist import javax.servlet.http.*;
[code]....
tom cat is running as a service it shows started in the tom cat app and as a running service in windows services !!!
I have a NetBeans web project on Tomcat 8.0.15, MySql (with Jconnector), Servlet/Jsp. I need a secure login!!! There is a login page. On successful login, if it is admin, servlet redirects to the admin page, if username is of a standardUser, the servlet redirects to the main page.
For now nothing works. The page is not redirected by servlet, on submit button press the error.html appears and shows response.getStatus() is 0!!! I tested(without login) servlet for username/password check against the DB and it works.
To deploy my project into %TOMCAT_HOME%webapps folder. Right click on Project ->Export-> War File Project Name: Hello Destination: D:Program FilesApache Software FoundationTomcat 6.0webappsHello.war
Result found in web browser:
HTTP Status 404 - /Hello/first And Hello.war file is not found in webapps folder too after exporting as .war. I am using Apache tomcat 6.0.37, eclipse 3.7.2 release, tomcat plugin :com.sysdeo.eclipse.tomcat_3.3.0
How do i make the 'date' column show only the date and 'timeIn' and 'timeOut' column only show the time. In my database table my 'date' column is a date type and 'timeIn' and 'timeOut' column is time.
So that I can map the first request coming say www.xyz.net to my first page , it does the work but some of my css and images is not getting displayed .
I am working on a little project to create an App that can read contents from a website and return it back to my app. What protocol to use for that. Just the reading/retrieving content from a website.
Is it possible to use java to log on to a website? I mean,Ii know how to connect to a website and send commands, but I am not sure how to tell the server that i want to login?
And then after you logged in is it possible to then do something? like, if you logged in to gmail.com you would be able to see your emails?
