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• High PageIOLatch_SH Waits with High Drive Idle times

  - by Marty Trenouth

  We are experiencing high volume of PageIOLatch_SH waits on our database (row counts in the Billions). However it seems that our drive Idle time Percentage hovers around 50-60 percent. CPU usage is nill. The Database Tuning Advisor gives no suggestions for optimization. The query plan (actual) from the single stored procedure used on the database puts the majority of the expense on index seek (yeah I know these should be optimial) operations. Anyone have suggestions of how to increase throughput?

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• 2d terrain generation in real time

  - by Skoder

  Hey, I'm trying to create a game similar to this (Note:When you click 'play', there are SFX in the game which you can't seem to turn off, so you may want to check volume). In particular, I'm interested in knowing how the 'infinite' landscape is generated. Are there any tutorials/articles describing this? I came across procedural generation, but I'm not quite sure what topics I should be looking for (or if it's even procedural generation). (I'm using C#, but I don't mind the language as I assume the theory behind it remains the same) Thanks for any suggestions

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• How do I make "simple" throughput servlet-filter?

  - by Tommy

  I'm looking to create a filter that can give me two things: number of request pr minute, and average responsetime pr minute. I already got the individual readings, I'm just not sure how to add them up. My filter captures every request, and it records the time each request takes: public void doFilter(ServletRequest request, ...() { long start = System.currentTimeMillis(); chain.doFilter(request, response); long stop = System.currentTimeMillis(); String time = Util.getTimeDifferenceInSec(start, stop); } This information will be used to create some pretty Google Chart charts. I don't want to store the data in any database. Just a way to get current numbers out when requested As this is a high volume application; low overhead is essential. I'm assuming my applicationserver doesn't provide this information.

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• Trouble using opaque pointers in Objective C++

  - by morgancodes

  The answer to this quesion explains that opaque pointers are a good way to include C++ member variables in an Objective C++ header. I'm getting compile errors when trying to follow the example. Here's the relevant code from my header, with the corresponding compiler errors shown as comments: struct ADSR_opaque; // error: forward declaration of 'struct ADSR_opaque' @interface LoopyPulser : NSObject{ float _pulseRate; UInt32 tickInterval; UInt32 step; InMemoryAudioFile * audioFilePlayer; ADSR_opaque* env; // error: expected specifier-qualifier-list before 'ADSR_opaque' Pattern * pattern; float loopLengthRatio; float volume; } Is there something simple I'm doing wrong here?

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• Rake don't know how to build task?

  - by Schroedinger

  Using a rake task to import data into a database: file as follows namespace :db do desc "load imported data from csv" task :load_csv_data => :environment do require 'fastercsv' require 'chronic' FasterCSV.foreach("input.csv", :headers => true) do |row| Trade.create( :name => row[0], :type => row[4], :price => row[6].to_f, :volume => row[7].to_i, :bidprice => row[10].to_f, :bidsize => row[11].to_i, :askprice => row[14].to_f, :asksize => row[15].to_i ) end end end When attempting to use this, with the right CSV files and the other elements in place, it will say Don't know how to build task 'db:import_csv_data' I know this structure works because I've tested it, I'm just trying to get it to convert to the new values on the fly. Suggestions?

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• Using my cell phone as remote control for PC via Bluetooth/Java

  - by Jan Kuboschek

  I've got a PC and a Samsung Eternity (that's a cell phone). I'd like to use my Eternity as remote control for my PC. Here's how I think I have to go about it: Write a desktop app (server) that accepts a connection from my cell. Write an app (client) for my cell through which I can establish a connection to the server and send commands to it. The server then executes the commands (e.g. adjust volume, pause/resume movie) Thoughts on that? Spot on or way off? Regarding the Eternity: What's a good way to get started with that? I'm guessing that I'll have to get the SDK. Does anyone have a good place to start/tutorial for that? Regarding the server: Does Java come with Bluetooth connectivity straight out of the box or do I need to fetch a library for that from somewhere? If so, from where? All help is much appreciated :)

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• How to get the playing file total time duration Media player

  - by Geetha

  Hi All, I use media player control to play mp3 files in asp.net application. I want to find When the playing process gets end and the total time require to finish the file using javascript. Code: <object id="mediaPlayer" classid="clsid:22D6F312-B0F6-11D0-94AB-0080C74C7E95" codebase="http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=5,1,52,701" height="1" standby="Loading Microsoft Windows Media Player components..." type="application/x-oleobject" width="1"> <param name="fileName" value="" /> <param name="animationatStart" value="true" /> <param name="transparentatStart" value="true" /> <param name="autoStart" value="true" /> <param name="showControls" value="true" /> <param name="volume" value="100" /> <param name="loop" value="true" /> </object> Geetha.

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• EF and design pattern

  - by kathy

  Hello, I’m working on a high volume transactional enterprise application(asp.net, windows app, oracle app as client) which has been designed using n-tire application and SOA architecture .The application was developed in the .NET platform utilizing C#,VB.NET, Framework 3.5 (I’m planning to upgrade to the , Framework 4.0), EF( EF in the data layer level) and WCF(WCF services in the service layer level) Since this is the first project using EF, and having read about using EF in n-tier and SOA applications, and the features available in the EF Feature, I have the following points: Which design pattern should I use in EF( Simple Entities, Change Set, Self-Tracking Entities and DTOs) in the data layer level In addition Which design pattern should I use in the other tier and layer to get the best practices of EF Thanks

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• wpf c# media player questions

  - by Sankar

  I'm making a media player in wpf using c#. I had 3 questions. 1) I tried making a seeker XAML: <Slider Name="timelineSlider" Margin="40,91,26,0" ValueChanged="SeekToMediaPosition" Height="32" VerticalAlignment="Top" /> Code: private void Element_MediaOpened(object sender, EventArgs e) { timelineSlider.Maximum = ply.NaturalDuration.TimeSpan.TotalMilliseconds; } private void SeekToMediaPosition(object sender, RoutedPropertyChangedEventArgs<double> e) { int SliderValue = (int)timelineSlider.Value; TimeSpan ts = new TimeSpan(SliderValue, SliderValue, SliderValue, SliderValue, SliderValue); ply.Position = ts; } When I run the program, I open the mp3 and play it but the seeker won't move. When I click on the seeker to move it to a certain position, the song stops playing but the seeker moves. What's the problem and how do I fix it? How do I create a volume increase/decrease bar? How can I open several mp3s and queue them up like a playlist? Thank you

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• Handling android player errors

  - by stack hoss

  I am anew android developer and i made ashoutcast radio player and work good but when i open app it work for afew time but suddenly stop and need to press stop and play again but i need Handling android player errors to automatic restart on errors package com.test.test; import java.io.IOException; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.media.AudioManager; import android.media.AudioManager.OnAudioFocusChangeListener; import android.media.MediaPlayer; import android.os.IBinder; import android.preference.PreferenceManager; import android.util.Log; public class StreamService extends Service { private static final String TAG = "StreamService"; MediaPlayer mp; boolean isPlaying; Intent MainActivity; SharedPreferences prefs; SharedPreferences.Editor editor; Notification n; NotificationManager notificationManager; // Change this int to some number specifically for this app int notifId = 85; private OnAudioFocusChangeListener focusChangeListener = new OnAudioFocusChangeListener() { public void onAudioFocusChange(int focusChange) { switch (focusChange) { case (AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK) : // Lower the volume while ducking. mp.setVolume(0.2f, 0.2f); break; case (AudioManager.AUDIOFOCUS_LOSS_TRANSIENT) : mp.pause(); break; case (AudioManager.AUDIOFOCUS_LOSS) : mp.stop(); break; case (AudioManager.AUDIOFOCUS_GAIN) : // Return the volume to normal and resume if paused. mp.setVolume(1f, 1f); mp.start(); break; default: break; } } }; @Override public IBinder onBind(Intent arg0) { // TODO Auto-generated method stub return null; } @SuppressWarnings("deprecation") @Override public void onCreate() { super.onCreate(); Log.d(TAG, "onCreate"); // Init the SharedPreferences and Editor prefs = PreferenceManager.getDefaultSharedPreferences(getApplicationContext()); editor = prefs.edit(); // Set up the buffering notification notificationManager = (NotificationManager) getApplicationContext() .getSystemService(NOTIFICATION_SERVICE); Context context = getApplicationContext(); String notifTitle = context.getResources().getString(R.string.app_name); String notifMessage = context.getResources().getString(R.string.buffering); n = new Notification(); n.icon = R.drawable.ic_launcher; n.tickerText = "Buffering"; n.when = System.currentTimeMillis(); Intent nIntent = new Intent(context, MainActivity.class); nIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP); PendingIntent pIntent = PendingIntent.getActivity(context, 0, nIntent, 0); n.setLatestEventInfo(context, notifTitle, notifMessage, pIntent); notificationManager.notify(notifId, n); // It's very important that you put the IP/URL of your ShoutCast stream here // Otherwise you'll get Webcom Radio String url = "http://47.182.19.93:9888/"; mp = new MediaPlayer(); mp.setAudioStreamType(AudioManager.STREAM_MUSIC); try { mp.reset(); mp.setDataSource(url); mp.prepare(); mp.start(); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (SecurityException e) { // TODO Auto-generated catch block Log.e(TAG, "SecurityException"); } catch (IllegalStateException e) { // TODO Auto-generated catch block Log.e(TAG, "IllegalStateException"); } catch (IOException e) { // TODO Auto-generated catch block Log.e(TAG, "IOException"); } } @SuppressWarnings("deprecation") @Override public void onStart(Intent intent, int startId) { Log.d(TAG, "onStart"); mp.start(); // Set the isPlaying preference to true editor.putBoolean("isPlaying", true); editor.commit(); Context context = getApplicationContext(); String notifTitle = context.getResources().getString(R.string.app_name); String notifMessage = context.getResources().getString(R.string.now_playing); n.icon = R.drawable.ic_launcher; n.tickerText = notifMessage; n.flags = Notification.FLAG_NO_CLEAR; n.when = System.currentTimeMillis(); Intent nIntent = new Intent(context, MainActivity.class); PendingIntent pIntent = PendingIntent.getActivity(context, 0, nIntent, 0); n.setLatestEventInfo(context, notifTitle, notifMessage, pIntent); // Change 5315 to some nother number notificationManager.notify(notifId, n); AudioManager am = (AudioManager)getSystemService(Context.AUDIO_SERVICE); // Request audio focus for playback int result = am.requestAudioFocus(focusChangeListener, // Use the music stream. AudioManager.STREAM_MUSIC, // Request permanent focus. AudioManager.AUDIOFOCUS_GAIN); if (result == AudioManager.AUDIOFOCUS_REQUEST_GRANTED) { // other app had stopped playing song now , so u can do u stuff now . } } @Override public void onDestroy() { Log.d(TAG, "onDestroy"); mp.stop(); mp.release(); mp = null; editor.putBoolean("isPlaying", false); editor.commit(); notificationManager.cancel(notifId); AudioManager am = (AudioManager)getSystemService(Context.AUDIO_SERVICE); am.abandonAudioFocus(focusChangeListener); } }

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• code to play sound programmatically using a button on the iphone

  - by Brandon

  I am trying to figure out how to hook up a button to play a sound programmatically without using IB. I have the code to play the sound, but have no way of hooking the button up to play the sound? any help? here is my code that I'm using: - (void)playSound { NSString *path = [[NSBundle mainBundle] pathForResource:@"boing_1" ofType:@"wav"]; AVAudioPlayer* myAudio = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:path error:NULL]]; myAudio.delegate = self; myAudio.volume = 2.0; myAudio.numberOfLoops = 1; [myAudio play]; }

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• itunes sdk list albums

  - by Matt Facer

  Hi guys, I'm working on a new test app (just out of curiosity really) which is an add on to iTunes. I'm trying fairly basic things at the mo, and have managed to control volume, pause etc etc. I have a function from some demo code which loops through all the tracks in my main library and gets their album name... I then show the individual album name in my listbox. This is FAR from the best way to do it! Is there a way to query the library to get just the album names? I ultimately want to get to a point where I can have a list of albums (with images) - I click on the album name and that loads the associated tracks.... thanks for any help! (I'm using VB.net btw)

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• Is Oracle AQ/Streams of any use in my situation?

  - by RenderIn

  I'm writing a workflow system that is driven entirely at each step by explicit human interaction. That is, a task is assigned to a person, that person selects from a few limited options {approve, reject, forward}, and then it is either sent along to the next person or terminated. Just curious of Oracle Streams/AQ has anything to offer over flat tables managed by regular web application code. The amount of processing after each action is fairly limited and the volume is not terribly high, so there's not really a need to throttle things by throwing them into a queue. What are some of the benefits of introducing a queue structure, or is it overkill for my situation?

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• Using "class/object" MooTools-style events in jQuery

  - by Infinity

  One of the nice things about MooTools, is that it lets you easily assign/fire events to objects, for example: var playerSingleton = new (new Class({ Implements: [Events], initialize: function() {}, setVolume: function() { // do some stuff.. this.fireEvent('volumeChanged') } })); // Somewhere else... playerSingleton.addEvent('volumeChanged', function() { // do something when volume changes }); playerSingleton.setVolume(75); // bam our event fires. How would something like this be done with jQuery? I know there's .bind and .trigger, but it seems like the only way to do this is to bind/fire events to the window object: $(window).bind('volumeChanged', fn); Is there anything better than this, more like the MooTools approach? Thanks!

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• Mediaplayer control issue in asp.net application

  - by Geetha

  Hi All, I am using the following code to use mediaplayer in asp.net application. Need: I have set showcontrol=false. I want to display the window after the completion of the song. Code: <object id="mediaPlayer" classid="clsid:22D6F312-B0F6-11D0-94AB-0080C74C7E95" codebase="http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=5,1,52,701" height="1" standby="Loading Microsoft Windows Media Player components..." type="application/x-oleobject" width="1"> <param name="fileName" value="" /> <param name="animationatStart" value="true" /> <param name="transparentatStart" value="true" /> <param name="autoStart" value="true" /> <param name="showControls" value="true" /> <param name="volume" value="100" /> <param name="loop" value="false" /> </object>

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• What's a good design to handle multiple global hotkeys?

  - by Alex

  I'm struggling to think of a good design to handle multiple global hotkeys. Say I have three different functions bound to three different global hotkeys... Play Song | Ctrl + P Skip Song | Ctrl + N Increase Volume | Ctrl + V What's a good, effective way to check if the hotkey pressed conforms to a certain function? I'm using a class very similar to this: http://www.liensberger.it/web/blog/?p=207 Should I create a new instance of the hotkey class for each hotkey? Hotkey hotkey = new Hotkey(); hotkey.RegisterHotkey(Shortcut.ModifierKeys.Control, Keys.F10); hotkey.KeyPressed += ((s, args) => { //Do Something! }); Or should I have an enum with different hotkey functions and manage it from within the hotkey class to prevent multiple instances (seems wasteful but easy). Thanks for any advice / help in advance.

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• Python and Gstreamer

  - by Seif Sallam

  hi, I'm creating a streaming application, using GStreamer with TCP pipeline, and i implemented start, pause, and stop. but the problem is, that i can't seek, i tried to change the playback value from the server side, then i tried on the client side, and Finally tried to change the value on both at the same time, but in all cases it doesn't work. and I even tried to pause the playback then continue but nothing happens. I'm having this problem with the seek and the volume. Any help please, I searched everywhere but i couldn't find anything that worked. this is the code that i use for seeking self.pipeline.seek_simple(gst.FORMAT_TIME, gst.SEEK_FLAG_FLUSH, time)

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• Experimenting with data to determine value - migration/methods?

  - by TCK

  Hey guys, I have a LOT of data available to me, and want to experiment with data that isn't currently being used in production. The obvious solution seems to be to make a copy of production data and integrate it with what I want to play around with, but I was wondering if there was a better (less expensive?) way to do this. Both isolation and integration are important. I'd like to be able to keep lightweight/experimental data assets apart from high volume production data, but also be able to integrate (RELATIVELY) painlessly if experimental assets are deemed useful. Thanks.

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• Trying to determine best design for this workflow - c# - 3.0

  - by ltech

  Input Server - files of type jpg,tif, raw,png, mov come in via FTP Each file needs to be watermarked, if applicable, and meta data added to the file Then each file needs to be moved to an orders directory where an order file is generated and then packaged as zip file and moved to processing server. The file names are of [orderid_userid_guid].[jpg|tif|mov|png...] As I expect the volume to grow I dont want to work on one file at a time and move it through the work flow. I would prefer multi threaded/asynchronous if possible..

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• How to catch Keyboard and mouse events?

  - by Alexey Malistov

  I want to create an application. This application has to do something when a user presses special keys on keyboard or/and uses scroll wheel. This application is a service. It has no windows. I want to catch any keyboard or mouse events which were designed with other applications. For example, you are watching TV by 3rd party application. If you press Ctrl + Shift and use scroll wheel my application changes the volume. I use Windows 7 x64 and Visual Studio 2008.

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• Preload *.wav with SystemSoundID?

  - by fuzzygoat

  I am playing a wav file to give a little audio feedback when a button in my UI is pressed. My question is when you first press the button there is a delay (about 1.5secs) whilst the sound file "sound.wav" is loaded and cached. Is there a way to pre-cache this file (maybe in my viewDidLoad)? I guess I could do it by just playing it a viewDidLoad, but would really need to disable the audio so it does not "beeb" each time the app starts. many thanks for and help. gary EDIT: Looks like my question is a duplicate of this post unless anyone has any new info? Maybe a way to turn the play volume down temporarily, unless the audio is cleared each time through the run loop.

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• Using GLOrtho to view Side, Front, Top perspectives of a 3D scene

  - by talldan

  Dear all, I'm building a game level editing app as part of a university project. In my application I have multiple viewports, a Perspective viewport and three orthographic views all setup to view the same scene. I've successfuly setup the orthographic views and can translate and scale them to mimic scrolling and zooming. Unfortunately, I'm having one problem - my scene still contains 3 dimensions, so objects viewed in orthographic mode of certain depths are clipped when they fall outside of my clipping volume. Most 3D authoring tools or level editors allow you to view all objects in orthographic mode regardless of depth. I guess what I need to do is scale my scene in the appropriate dimension so that all values lie between 1 and -1, is there a straightforward way of going about this? Or is there a different better approach. Thanks very much for your help, Dan

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• Does HashMap provide a one to one correspondence?

  - by Roman

  I found the following statement: Map is an object that stores key/volume pairs. Given a key, you can find its value. Keys must be unique, but values may be duplicated. For example I have just one key/value pair (3,4). And now I put a new pair (3,5). It will remove the old pair. Right? But if I put (2,4) instead of (3,4) I will add a new pair of key/value to the HashMap. Right?

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• Using JavaScript eval to parse JSON

  - by Quandary

  Question: I'm using eval to parse a JSON return value from one of my WebMethods. I prefer not to add jquery-json because the transfer volume is already quite large. So I parse the JSON return value with eval. Now rumors go that this is insecure. Why ? Nobody can modify the JSOn return value unless they hack my server, in which case I would have a much larger problem anyway. And if they do it locally, JavaScript only executes in their browser. So I fail to see where the problem is. Can anybody shed some light on this, using this concrete example? function OnWebMethodSucceeded(JSONstrWebMethodReturnValue) { var result=eval('(' + JSONstrWebMethodReturnValue + ')') ... // Adding result.xy to a table }

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• Techniques for Visualizing Data

  - by Rob Wilkerson

  I'm looking into providing several methods of visualizing a large volume of data. This may include, but will not be limited to, simple graphing. The techniques I'm exploring will involve shapes, text and lines. It will also involve interaction with elements (hiding, focusing, etc.) and animation (shifting, dragging, systematic reorganizing, etc.) of those elements. SVG or Canvas seem like the obvious choices (in conjunction with a JS library--probably jQuery), but the lack of cross-browser availability is a concern. I'd prefer to avoid Flash/Flex, but right now it's the only rock solid, cross-browser technology I've found if support for IE7/8 is a requirement. Does anyone have any other suggestions or any additional information that would make a technology I've listed seem even more appealing? Thanks.

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