submerged - Developer IT

BlackBerry Simulator & BIS Push Service

- by Submerged

I am hoping that someone knows if you can use RIMM's push service with BIS WITHOUT a hand held device. I have registered for the push evaluation and I want to program a push server that will send out notifications to BB clients. I got my email this morning containing: Server: Application: XXXXXXXXXXXXXXXXXXX Pwd: xxxXXXXX CPID (Content Provider ID):xxx Start Date (MM/DD/YYYY): X/X/XXXX Expiry Date (MM/DD/YYYY):X/X/XXXX First Name:XXXXXXX Last Name:XXXXX Email:[email protected] Account Type:Plus Source IP:xxx.xxx.xxx.xxx Usage:BIS AND Client: Application Credentials (for use in your client application): Application ID:XXX-xxxxxxxxxxxxxxx Push Port:xxxxx I am hoping someone can tell me where to get started - as an iPhone developer, I have to say, there is much more information. Lastly, if I DO need a device, does that device have to have a dataplan? I wanted to be able to serve my clients from WiFi as well, does the BB push system work only on Cell networks? Thank you

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[java] Efficiency of while(true) ServerSocket Listen

- by Submerged

I am wondering if a typical while(true) ServerSocket listen loop takes an entire core to wait and accept a client connection (Even when implementing runnable and using Thread .start()) I am implementing a type of distributed computing cluster and each computer needs every core it has for computation. A Master node needs to communicate with these computers (invoking static methods that modify the algorithm's functioning). The reason I need to use sockets is due to the cross platform / cross language capabilities. In some cases, PHP will be invoking these java static methods. I used a java profiler (YourKit) and I can see my running ServerSocket listen thread and it never sleeps and it's always running. Is there a better approach to do what I want? Or, will the performance hit be negligible? Please, feel free to offer any suggestion if you can think of a better way (I've tried RMI, but it isn't supported cross-language. Thanks everyone

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Efficiency of while(true) ServerSocket Listen

- by Submerged

I am wondering if a typical while(true) ServerSocket listen loop takes an entire core to wait and accept a client connection (Even when implementing runnable and using Thread .start()) I am implementing a type of distributed computing cluster and each computer needs every core it has for computation. A Master node needs to communicate with these computers (invoking static methods that modify the algorithm's functioning). The reason I need to use sockets is due to the cross platform / cross language capabilities. In some cases, PHP will be invoking these java static methods. I used a java profiler (YourKit) and I can see my running ServerSocket listen thread and it never sleeps and it's always running. Is there a better approach to do what I want? Or, will the performance hit be negligible? Please, feel free to offer any suggestion if you can think of a better way (I've tried RMI, but it isn't supported cross-language. Thanks everyone

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500 Worker Threads, what kind of thread pool?

- by Submerged

I am wondering if this is the best way to do this. I have about 500 threads that run indefinitely, but Thread.sleep for a minute when done one cycle of processing. ExecutorService es = Executors.newFixedThreadPool(list.size()+1); for (int i = 0; i < list.size(); i++) { es.execute(coreAppVector.elementAt(i)); //coreAppVector is a vector of extends thread objects } The code that is executing is really simple and basically just this class aThread extends Thread { public void run(){ while(true){ Thread.sleep(ONE_MINUTE); //Lots of computation every minute } } } I do need a separate threads for each running task, so changing the architecture isn't an option. I tried making my threadPool size equal to Runtime.getRuntime().availableProcessors() which attempted to run all 500 threads, but only let 8 (4xhyperthreading) of them execute. The other threads wouldn't surrender and let other threads have their turn. I tried putting in a wait() and notify(), but still no luck. If anyone has a simple example or some tips, I would be grateful! Well, the design is arguably flawed. The threads implement Genetic-Programming or GP, a type of learning algorithm. Each thread analyzes advanced trends makes predictions. If the thread ever completes, the learning is lost. That said, I was hoping that sleep() would allow me to share some of the resources while one thread isn't "learning"

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JAVA: 500 Worker Threads, what kind of thread pool?

- by Submerged

I am wondering if this is the best way to do this. I have about 500 threads that run indefinitely, but Thread.sleep for a minute when done one cycle of processing. ExecutorService es = Executors.newFixedThreadPool(list.size()+1); for (int i = 0; i < list.size(); i++) { es.execute(coreAppVector.elementAt(i)); //coreAppVector is a vector of extends thread objects } I do need a separate threads for each running task, so changing the architecture isn't an option. I tried making my threadPool size equal to Runtime.getRuntime().availableProcessors() which attempted to run all 500 threads, but only let 8 (4xhyperthreading) of them execute. The other threads wouldn't surrender and let other threads have their turn. I tried putting in a wait() and notify(), but still no luck. If anyone has a simple example or some tips, I would be grateful!

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Is it possible to set a SRV record with xname.org

- by Emilien

According to XName's (not up-to-date) ChangeLog Thu Oct 19 2006 Yann Hirou ([email protected]) Adding SRV records - including modification of dns_records it appears to be possible to set a SRV record for one of your zones. However, I just can't find a way to do this in the UI. I've contacted Yann Hirou, but didn't receive any answer (he is either submerged by emails, or only responds to "paying supporters") It might be that the feature is available in the source code, but that the instance running on XName has not been updated (since 2006?) Has anyone using XName been able to set up such records? Otherwise I might be forced to switch to another free DNS service...

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