channel

So I've decided to up the performance a bit in my WCF application, and attempt to cache Channels and the ChannelFactory. There's two questions I have about all of this that I need to clear up before I get started. 1) Should the ChannelFactory be implemented as a singleton? 2) I'm kind of unsure about how to cache/reuse individual channels. Do you have any examples of how to do this you can share? It's probably important to note that my WCF service is being deployed as a stand alone application, with only one endpoint. EDIT: Thank you for the responses. I still have a few questions though... 1

For more detailed information regarding the motivation behind this goal (and my efforts to solve it) view my previous question . I decided to ask this as a new question entirely as I thought that it had evolved sufficiently to merit doing so. As a summary, I intend to use JDOM in combination with NIO in order to: Gain an exclusive file lock on an xml file. Read the file into a Document object. Make arbitrary changes (with lock still active!). Write the changes back to the xml file. Release the file lock. The issue which I am getting however is that the built-in code to read the xml file into a

I wish to know what is the proper way of waiting for a go routine to finish before exiting the program. Reading some other answers it seems that a bool chan will do the trick, as in Playground link func do_stuff(done chan bool) { fmt.Println("Doing stuff") done <- true } func main() { fmt.Println("Main") done := make(chan bool) go do_stuff(done) <-done //<-done } I have two questions here: why the <- done works at all? what happens if I uncomment the last line? I have a deadlock error. Is this because the channel is empty and there is no other function sending values to it? Why the <- done

I have this code: Synthesizer synthesizer = MidiSystem.getSynthesizer(); synthesizer.open(); Instrument[] instrument = synthesizer.getDefaultSoundbank().getInstruments(); synthesizer.loadInstrument(instrument[29]); MidiChannel[] channels = synthesizer.getChannels(); MidiChannel channel = channels[1]; channel.programChange(29); channel.noteOn(noteNumber, 127); Teszthang.sleep(2000); channel.noteOff(noteNumber); so this is an example, to play a sound in max volume (127) for 2 seconds. but i want to control the channel's volume, like after 2 seconds, the volume fade out in an another 2 seconds.

I've been trying to solve this simple problem I encountered in Golang concurrency. I've been searching all possible solutions, but found nothing specific to my problem(or I might be missed one). Here's my code: package main import ( "fmt" "time" ) func producer(ch chan int, d time.Duration, num int) { for i:=0; i<num; i++ { ch <- i time.Sleep(d) } } func main() { ch := make(chan int) go producer(ch, 100*time.Millisecond, 2) go producer(ch, 200*time.Millisecond, 5) for { fmt.Println(<-ch) } close(ch) } It prints error: fatal error: all goroutines are asleep - deadlock! goroutine 1 [chan receive

I am trying to connect to a SFTP remote server using JSCH library version 0.1.49. Every time I run the program I receive the following error : Initializing... Connection to SFTP server is successfully com.jcraft.jsch.JSchException: Unable to connect to SFTP server.com.jcraft.jsch.JSchException: failed to send channel request at shell.MainClass.JschConnect(MainClass.java:95) at shell.MainClass.main(MainClass.java:30) line 30 is : sftpChannel.connect() from the code below : System.out.println("Initializing..."); JSch jsch = new JSch(); Session session = null; try { session = jsch.getSession

I want to find a queue structure (a data container) whose elements must be first-in-first-out. It is important for me that the structure must be thread-safe. I'm going to use this data container as something like a task or connection pool. I know a buffered channel is thread-safe, but I wonder if it works as FIFO, especially in a concurrent situation. And if it is possible to use buffered channel as a thread-safe queue, do I need to worry about its efficiency? I'm pretty sure that Channels are FIFO. They are also cheap so they would be memory efficient. Beyond that without knowing the details

I read about.wav file format by googling,all I could figure was that Frames are made of samples(of some defined bit depth) and a wav stereo file has a multiple of something called channels.... The confusion is whether a channel is made up of frames? Do all channels play along when I play some audio file? If a channel is made up of frames,are all channels equal in length(bit wise)? Please answer if someone can,I have to display each channel separately when playing a wav file in waveform In each frame in wav there are channels. If you have stereo sound, then each frame contains two samples (left