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• socket.accept error 24: To many open files

  - by Creotiv

  I have a problem with open files under my Ubuntu 9.10 when running server in Python2.6 And main problem is that, that i don't know why it so.. I have set ulimit -n = 999999 net.core.somaxconn = 999999 fs.file-max = 999999 and lsof gives me about 12000 open files when server is running. And also i'm using epoll. But after some time it's start giving exeption: File "/usr/lib/python2.6/socket.py", line 195, in accept error: [Errno 24] Too many open files And i don't know how it can reach file limit when it isn't reached. Thanks for help)

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• Code Review "ToDo" Follow Up Items

  - by Blake Blackwell

  I am trying to institute code reviews at my company, and recently we had our first code review meeting. During the meeting, several positive suggestions were made and I added TODO comments in my code for following up. After reading suggestions on here on best practices for code reviews, I would like to follow up on all the items I corrected at the start of the next meeting. Is there a way to add a similar type of comment to the code such as FOLLOWUP so that I can quickly highlight through those code segments in the next meeting?

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• Wait for tasks to get completed in threadpool.

  - by Alien01

  Hello I have created a thread pool in C++ which stores all tasks in a queue. Thread pool start n number of threads which takes tasks from queue , process each task and then delete tasks from queue. Now , I want to wait till all tasks get completed. Checking for empty queue for completion of tasks may not work as , task can be given to each thread and queue can be emptied but still the tasks can in processing mode. I am not getting idea how to wait for all the tasks completion.This is a design problem. Any suggestions?

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• "Dynamic" java validation framework?

  - by pihentagy

  AFAIK JSR-303 is the standard bean validation system. I don't know whether it could do validations like this (I guess no): if an object has a deleted flag set, you cannot modify the object you cannot change the start date property, after the date is passed you cannot decrease some integer properties in the bean So how can I handle validations, which depend on the previous state of an object? I would like to solve problems like that in hibernate3.5 - spring3 - JPA2 environment. Thanks My solution was to mess with hibernate, reload the object to see the old state (after evicting the new object). This time I need some smarter solution...

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• iSightAudio.plugin error when playing video using MediaPlayer

  - by Elisabeth

  I am working on creating a simple iPhone app that plays a movie via URL. When I Build&Run to test in the simulator, it works fine; as soon as I start playing the movie, I get the following message in the console: [1757:4b03] Cannot find executable for CFBundle/CFPlugIn 0x820ffe0 </Library/Audio/Plug-Ins/HAL/iSightAudio.plugin> (not loaded) [1757:4b03] Cannot find function pointer iSightAudioNewPlugIn for factory 9BE7661E-8AEF-11D7-8692-000A959F49B0 in CFBundle/CFPlugIn 0x820ffe0 </Library/Audio/Plug-Ins/HAL/iSightAudio.plugin> (not loaded) I don't get this error on other programs, so I assume it has something to do with this specific program, which uses the MediaPlayer.framework. Does anyone know what is causing this problem and how to fix it? Thank you

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• Why does Perl's Crypt::SSLeay timeout on Intel Mac OS X machines?

  - by Joe

  A have a Perl cron job that recently started having its HTTPS connections start failing with an error of "500 SSL read timeout". I've tracked that the error is being thrown as part of an alarm in Crypt::SSLeay, but I don't know if this is simply something taking too long to respond. So far, I've adjusted the timeout from the default 30 seconds to 10 minutes and it still times out. I've moved the script to other machines, and those on Intel Mac OS X systems all time out, while those under Linux, or on PPC Mac OS X systems run fine, so I don't think it's changes on the network or remote server. When the process started having problems does not coincide with any software updates or reboots on the machine, and I've contacted the server I'm connecting to, and everyone claims that they haven't changed anything. Does anyone have recommendations on trying to debug HTTPS, or have you ever seen this behavior and give recommendations on something I might've overlooked at that could've caused this problem?

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• Iphone Icon Changed

  - by dragon

  Hi When i start to develop my application , I used iPhone version 2.0.... Now i have update Iphone version 3.0.. My simulator works fine both in iphone 2.0 as well as iphone 3.0.. But When i run my application in 2.0 all icons in the iphone should be correct . But when i run this in 3.0 my other applications icons are changed.... (Example my safari icon should be placed to itunes and itunes icon to settings likewise all icons changed) I dont know why? Can anyone help me? THanks in advance.......

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• What is the best way to access Google Calendar from ruby?

  - by Jakub Hampl

  I'm writing an app for a company that uses Google Calendar internally and would need to use events they already have in their calendar in the app. So I need to get read only access to their calendars from the app (namely I need the events title, start and end dates and attendee emails for all future events). What is the simplest way to do this in ruby (I would need it to work relatively seamlessly on Heroku)? I tried using the GCal4Ruby gem which seemed the least outdated of the ones I found but I'm unable to even authenticate through the library (HTTPRequestFailed - Captcha required error) let alone get the info I need.

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• Need SQL Server Stored Procedure for This Query

  - by djshortbus

  I have a ASPX.NET DataGrid and im trying to USE a select LIKE 'X'% from a table that has 1 field called location. im trying to display the locations that start with a certain letter (example wxxx,axxx,fxxx,) in different columns in my data grid. SELECT DISTINCT LM.LOCATION AS '0 LOCATIONS' , LM.COUNTLEVEL AS 'COUNTLEVEL' FROM SOH S WITH(NOLOCK) JOIN LOCATIONMASTER LM ON LM.LMID = S.LMID WHERE LM.COUNTLEVEL = 1 AND LM.LOCATION NOT IN ('RECOU','PROBLEM','TOSTOCK','PYXVLOC') AND LM.LOCATION LIKE '0%' SELECT DISTINCT LM.LOCATION AS 'A LOCATIONS' , LM.COUNTLEVEL AS 'COUNTLEVEL' FROM SOH S WITH(NOLOCK) JOIN LOCATIONMASTER LM ON LM.LMID = S.LMID WHERE LM.COUNTLEVEL = 1 AND LM.LOCATION NOT IN ('RECOU','PROBLEM','TOSTOCK','PYXVLOC') AND LM.LOCATION LIKE 'A%'

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• making a gui editor

  - by Manny

  Hello, For my school project, I would like to build a gui that someone else can use to create a gui. Upon some research I saw lot of gui builders but didn't see anything along the lines of what I am looking for. But then I did find a tutorial using C# on here I rather create this gui editor for linux environment. Any suggestions to where I should start? what tools I can use? Any links to any tutorials? Any help/direction would be greatly appreciated.

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• Panel is not displaying in JFrame

  - by mallikarjun

  I created a chat panel and added to Jframe but the panel is not displaying. But my sop in the chat panel are displaying in the console. Any one please let me know what could be the problem My Frame public class MyFrame extends JFrame { MyPanel chatClient; String input; public MyFrame() { input = (String)JOptionPane.showInputDialog(null, "Name:", "Connect to chat server", JOptionPane.QUESTION_MESSAGE, null,null, "Test"); input=input.trim(); chatClient = new MyPanel("localhost",input); setVisible(true); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); add(chatClient); } public static void main(String...args){ new MyFrame(); } } MyPanel: public class MyPanel extends JPanel{ ChatClient chatClient; public MyPanel(String host, String uid) { chatClient= new ChatClient(host,uid); add(chatClient.getChatPanel()); this.setVisible(true); } } chat panel: public class ChatClient { Client client; String name; ChatPanel chatPanel; String hostid; public ChatClient(String host,String uid){ client = new Client(); client.start(); System.out.println("in constructor"); Network.register(client); client.addListener(new Listener(){ public void connected(Connection connection){ System.out.println("in client connected method"); Network.RegisterName registerName = new Network.RegisterName(); registerName.name=name; client.sendTCP(registerName); } public void received(Connection connection,Object object){ System.out.println("in client received method"); if (object instanceof Network.UpdateNames) { Network.UpdateNames updateNames = (Network.UpdateNames)object; //chatFrame.setNames(updateNames.names); System.out.println("got it message"); return; } if (object instanceof Network.ChatMessage) { Network.ChatMessage chatMessage = (Network.ChatMessage)object; //chatFrame.addMessage(chatMessage.text); System.out.println("send it message"); return; } } }); // end of listner name=uid.trim(); hostid=host.trim(); chatPanel = new ChatPanel(hostid,name); chatPanel.setSendListener(new Runnable(){ public void run(){ Network.ChatMessage chatMessage = new Network.ChatMessage(); chatMessage.chatMessage=chatPanel.getSendText(); client.sendTCP(chatMessage); } }); new Thread("connect"){ public void run(){ try{ client.connect(5000, hostid,Network.port); }catch(IOException e){ e.printStackTrace(); } } }.start(); }//end of constructor static public class ChatPanel extends JPanel{ CardLayout cardLayout; JList messageList,nameList; JTextField sendText; JButton sendButton; JPanel topPanel,bottomPanel,panel; public ChatPanel(String host,String user){ setSize(600, 200); this.setVisible(true); System.out.println("Chat panel "+host+"user: "+user); { panel = new JPanel(new BorderLayout()); { topPanel = new JPanel(new GridLayout(1,2)); panel.add(topPanel); { topPanel.add(new JScrollPane(messageList=new JList())); messageList.setModel(new DefaultListModel()); } { topPanel.add(new JScrollPane(nameList=new JList())); nameList.setModel(new DefaultListModel()); } DefaultListSelectionModel disableSelections = new DefaultListSelectionModel() { public void setSelectionInterval (int index0, int index1) { } }; messageList.setSelectionModel(disableSelections); nameList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION); } { bottomPanel = new JPanel(new GridBagLayout()); panel.add(bottomPanel,BorderLayout.SOUTH); bottomPanel.add(sendText=new JTextField(),new GridBagConstraints(0,0,1,1,1,0,GridBagConstraints.CENTER,GridBagConstraints.BOTH,new Insets(0,0,0,0),0,0)); bottomPanel.add(sendButton=new JButton(),new GridBagConstraints(1,0,1,1,0,0,GridBagConstraints.CENTER,0,new Insets(0,0,0,0),0,0)); } } sendText.addActionListener(new ActionListener(){ public void actionPerformed(ActionEvent e){ sendButton.doClick(); } }); } public void setSendListener (final Runnable listener) { sendButton.addActionListener(new ActionListener() { public void actionPerformed (ActionEvent evt) { if (getSendText().length() == 0) return; listener.run(); sendText.setText(""); sendText.requestFocus(); } }); } public String getSendText () { return sendText.getText().trim(); } public void setNames (final String[] names) { EventQueue.invokeLater(new Runnable(){ public void run(){ DefaultListModel model = (DefaultListModel)nameList.getModel(); model.removeAllElements(); for(String name:names) model.addElement(name); } }); } public void addMessage (final String message) { EventQueue.invokeLater(new Runnable() { public void run () { DefaultListModel model = (DefaultListModel)messageList.getModel(); model.addElement(message); messageList.ensureIndexIsVisible(model.size() - 1); } }); } } public JPanel getChatPanel(){ return chatPanel; } }

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• How Do I create a synchronous version of NSURLConnection

  - by quinn

  I am using NSURLConnection inside of an NSIncrementalStore to synchronize my NSManagedObject with rest based web service built in Rails. I am aware of +sendSynchronousRequest:returningResponse:error but my understanding is that will not allow me to access such things as the HTTP response status code which I will need to properly handle the response, my understanding is sendSynchronousRequest returns the data if it responds in the 200 range and fails if it doesn't and doesn't really give you much more than that. I'm assuming I will somehow have to block the current method call after the NSURLConnection is instantiated and unblock it after NSURLConnection's delegate sets some value that can be returned by the blocked method. I'm assuming this will involve some combination of NSLock and NSThread but I really don't know where to start with this, any help will be greatly appreciated, thank you.

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• How to verify a digital signature with openssl

  - by Aaron Carlino

  I'm using a thirdparty credit card processing service (Paybox) that, after a successful transaction, redirects back to the website with a signature in the URL as a security measure to prevent people from manipulating data. It's supposed to prove that the request originated from this service. So my success URL looks something like this: /success.php?signature=[HUGE HASH] I have no idea where to start with verifying this signature. This service does provide a public key, and I assume I need to create a private key, but I don't know much beyond that. I'm pretty good with linux, and I know I'll have to run some openssl commands. I'm writing the verification script in PHP, which also has native openssl() functions. If anyone could please push me in the right direction with some pseudo code, or even functional code, I'd be very grateful. Thanks.

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• Need SQL Server Stored Procedure for This Query

  - by djshortbus

  I have a ASPX.NET DataGrid and im trying to USE a select LIKE 'X'% from a table that has 1 field called location. im trying to display the locations that start with a certain letter (example wxxx,axxx,fxxx,) in different columns in my data grid. SELECT DISTINCT LM.LOCATION AS '0 LOCATIONS' , LM.COUNTLEVEL AS 'COUNTLEVEL' FROM SOH S WITH(NOLOCK) JOIN LOCATIONMASTER LM ON LM.LMID = S.LMID WHERE LM.COUNTLEVEL = 1 AND LM.LOCATION NOT IN ('RECOU','PROBLEM','TOSTOCK','PYXVLOC') AND LM.LOCATION LIKE '0%' SELECT DISTINCT LM.LOCATION AS 'A LOCATIONS' , LM.COUNTLEVEL AS 'COUNTLEVEL' FROM SOH S WITH(NOLOCK) JOIN LOCATIONMASTER LM ON LM.LMID = S.LMID WHERE LM.COUNTLEVEL = 1 AND LM.LOCATION NOT IN ('RECOU','PROBLEM','TOSTOCK','PYXVLOC') AND LM.LOCATION LIKE 'A%'

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• Getting a variable out of a Public Void (Android)

  - by James Rattray

  I have this code: hubSpinner.setOnItemSelectedListener(new OnItemSelectedListener() { public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) { final MediaPlayer mp2 = MediaPlayer.create(Textbox.this, R.raw.hero); mp2.start(); } public void onNothingSelected(AdapterView<?> parentView) { } }); (The code basically runs when a new item is selected of a spinner and then plays a song, -which later will be a variable based on what was picked, but i'm fine as it is for now) Problem: And I want to be able to use 'mp2' out of this public void, (I want a button which pauses it) How can I do this? Please explain/show... Thanks alot James

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• WCF competitive consumer pattern

  - by Simon Thompson

  Is it possible to create a WCF service (web service) that only accepts a single connection at any one time with all other calls either queued or rejected. Need to implement the competitive consumer pattern where there are a number of clients which could deal with task at hand but when a client askes for more work a task must go to only one of them. Usual done as part of an enterprise service bus but can not find one that I'm happy to start using so looking to get this behaviour through a WCF service. Any ideas people ?

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• Does an Intent's extras still get flattened into a Parcel even if the new activity is being started

  - by Neil Traft

  I was wondering... So if you start a new activity via an intent, the intent has to be serialized and deserialized because you may have to send the intent to a separate VM instance via IPC. But what if the PackageManager knows that your new activity will be created on the current task? It seems like a reasonably Googly optimization would be not to serialize the intent at all, since it's all happening inside the same VM. But then again, you can't just allow the new activity to use the same instance of each parcelable, because any changes made by the new activity would show up in the old activity and the programmer might not be expecting this. So, is this optimization being done? Or do the extras always get marshalled and unmarshalled, no matter what?

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• Need better Java application deployment strategy

  - by Jeff Post

  I have various Java Swing applications that are used by multiple users. My deployment strategy is to locate the .jar file on a network share, and users create shortcuts to that file. When the user launches an application, the file is copied to their machine and executed locally. This method allows for a single copy of the code and easy updating. The problem is that I can't update the file on the network share if any user is using the application at that time. I can't use Web Start because I don't have access to a cert for signing the jar. My current workaround is a separate application that copies the desired app to the user's local machine, launches the application, and then the launcher exits. There is a several second delay from when the launcher app exits and the user's app becomes visible. Can anyone suggest a better deployment method where I can easily update a central copy of the application, one where Windows XP won't maintain a lock on the file?

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• Lightweight PHP server to bundle with application?

  - by munchybunch

  Does there exist some sort of PHP server that can be bundled with a locally-deployed application? It sounds wonky, but the end result is I can't use a remote web server to do anything. Clients will be downloading a package, and the plan is to use a Java backend that reads from a flat file. The flat file contains settings and is modified through a GUI written in HTML/JS, and this is where the server would come in. The forms in HTML should be able to submit to the server, which does a simple file write to the flat file. Is there any simple, lightweight server that has that simple feature? When running the executable for the application, it would start the installation process for the server before moving the web GUI files to the appropriate locations. Note that I'm doing this for a client, so I can't quite change the reqs and would rather not discuss their effectiveness. I would be ever thankful if people had suggestions for the server though!

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• Netlink user-space and kernel-space communication

  - by sasayins

  Hi, I am learning programming in embedded systems using Linux as my main platform. And I want to create a Device Event Management Service. This service is a user-space application/daemon that will detect if a connected hardware module triggered an event. But my problem is I don't know where should I start. I read about Netlink implementation for userspace-kernelspace communication and it seems its a good idea but not sure if it is the best solution. But I read that the UDEV device manager uses Netlink to wait a "uevent" from the kernel space but it is not clear for me how to do that. I read about polling sysfs but it seems it is not a good idea to poll filesystem. What do you think the implementation that should I use in my service? Should I use netlink(hard/no clue how to) or just polling the sysfs(not sure if it works)? Thanks

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• How to build a character table.

  - by Mark Tomlin

  $chars = array ( ' ', '!', '"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', '/', 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, ':', ';', '<', '=', '>', '?', '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '{', '|', '}', '~' ); With the characters from the $chars array, I would like to find all possible combinations, for a length up to $n. **For Example**: It should start off with ' ', and then go to '!'. Once it gets to the end of the $chars array (`~`) it should add on another charter. Run though those combinations ('! ', '" ', ... '~ ', ' !' ... '~~', ' ', ect). And then just keep on going ...

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• dynamically change bitmap in imageView, android

  - by Junfei Wang

  All, I have a problem related to imageView, android. I have array which contains of 10 bitmap objects, called bm. I have a imageView, called im. Now I wanna show the bitmaps in the array in im one by one, so I did the following: new Thread(new Runnable() { public void run() { for(int j=0;j<10;j++){ im.setImageBitmap(bm[j]); } } }).start(); But the result only shows the last bitmap in the array. Can someone tell me what to do with this issue? Millions of thanks!

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• Basic Android Layout Question

  - by jonhobbs

  Hi, I'm new to android but I've been working my way through the tutoials. Still trying to get my head round layouts in a non-html world and was wondering how to achieve the following.... 1) I'd like to set a tiled background to fill the screen behind the whole activity 2) I'd like to place a graphic and a button underneath it centred in the middle of the screen. 3) When the user clicks the button I'd like to start a new activity and presumably I have to do something to the current activity so the user can use the back button to get back to it. Sorry for the newbie question. Jon

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• RedirectStandardInput crashes program

  - by Roman

  Hi, the following code is to open a console application (which uses pdcurses for output, nothing special): myProcess.StartInfo.FileName = "some.exe"; myProcess.StartInfo.UseShellExecute = false; myProcess.StartInfo.CreateNoWindow = false; myProcess.StartInfo.RedirectStandardInput = true; myProcess.Start(); The Problem is that it opens the designated window but directly closes it (it's barely visible). Starting the program without RedirectStandardInput works. The problem is that it does not throw an exception nor any error-message. What is wrong with my code? How can I write input to the program? Thanks.

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• Facebook app: Using Flex or JQuery

  - by javanes

  Hello; I am about to start a new project, a facebook app. There are two alternatives for client-side in my mind. Write Flex-Facebook app. Or write html with Ajax and Jquery. So what are your opinion, which do you recommend? What are the issues about each to take into account? Advantages, disadvantages, subjective opinion? Thank you help me decide..

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