How to scroll to see multiple threads?

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• concurrent writes to a logfile from multiple threads (Java 7)?

  Hello everyone

  I have a multi-threaded Java 7 (jar file) program that uses JDBC to perform work (he uses a fixed pool of threads).

  The program works very well and it records things that it moves the console command shell window (System.out.printf ()) starting from multiple concurrent threads.

  In addition to the release of the console, I also need to add the capability of this program write in a single flat ASCII text file journal - starting from multiple threads.

  The output volume is low, the file will be relatively low because it is not a data file, a log file.

  Can you please suggest a relatively simple and good to achieve design/approach using Java 7 features (I have not yet Java 8)?

  The code examples would also be appreciated.

  Thank you very much

  I have a multi-threaded Java 7 (jar file) program that uses JDBC to perform work (he uses a fixed pool of threads).

  The program works very well and it records things that it moves the console command shell window (System.out.printf ()) starting from multiple concurrent threads.

  In addition to the release of the console, I also need to add the capability of this program write in a single flat ASCII text file journal - starting from multiple threads.

  The output volume is low, the file will be relatively low because it is not a data file, a log file.

  Can you please suggest a relatively simple and good to achieve design/approach using Java 7 features (I have not yet Java 8)?

  The code examples would also be appreciated.

  Use a dedicated thread for logging and a queue to source it. See the "queue implementations of the trails in the Java tutorials for the use of queues and the code example that works.

  https://docs.Oracle.com/javase/tutorial/collections/implementations/queue.html

  Java has several classes of queue synchronized you can use if those in this tutorial are not suitable for your use case. Here's just one:

  https://docs.Oracle.com/javase/7/docs/API/Java/util/concurrent/ConcurrentLinkedQueue.html

  Unlimited thread-safe queue based on linked nodes. This queue orders elements FIFO (first-in-first-out). The head of the queue is this element which remained the longest the queue. The tail of the queue is this element that has been on the queue as quickly as possible. New elements are inserted at the tail of the queue, and get the recovery operations of the queue of the elements at the head of the queue. At ConcurrentLinkedQueue is a good choice when the number of threads will share access to a common collection. Like most other concurrent collection implementations, this class does not allow the use of null elements.

  Using a queue your current code can add recording which is FAST because it is add an instance of the class to a collection rather interact with the file system. And your current code requires NO knowledge of the functioning of the system of newspaper, that it connects or when and where it connects.

  For your use case use you a synchronized queue and edit each of your worker threads to add their log data to the master queue used by the newspaper for the logging thread.

  You shouldn't have multiple threads trying to write directly in the same file.

  The entire point of the modular and multi-processing programming is to BREAK dependencies between modules of code.

  The logging system must be INDEPENDENT of the other code and your current code must NOT have ANY need or knowledge of the file system or OF the specificity of the way where, or when the data is actually stored.

  Your code must run simple and minimal logging by adding its data to a queud. Once the log data was added to the queue and then, as far as your code is concerned, that data has been noted. It should be ONLY module log to determine the LOCATION to save the data, HOW to record data and even WHAT information to log.

  You can add the larger newspapers in the future: newspapers, paper 1) different levels of 2) to a remote server or the database 3 send some events in the log.

  I suggest you create a SIMPLE D.O. (data object) to maintain the log info (attributes like gravity, time/date, type of exception stack, error, etc.). Then create a class of SIMPLE log with several overloaded methods: a method that takes a single parameter, with two, etc. Javas is owner of exception classes have some simple examples of both simple and complex, nested exception handling.

  These methods journal would take care to fill in the NEWSPAPER to DO correctly and then placing the instance of the D.O. to the journal queue. In this way, you can use a parameter of a simple newspaper just pass an error message and the log class method will add a default severity level (which can vary from thread if you want), time (which can range from wire) and other necessary data.

  The goal is to keep the journal interface use you in your existing code as SIMPLE as possible while keeping as independent as possible of the actual logging mechanism.

  The result is a mechanism of simple logging that is versatile and scalable and can then be used for your PROJECTS that require a registration (file, database, e-mail).

  Do not make the mistake to hardcode the mechinism journal in your existing code.

  DO not continue independent, modular architecture that you already use.

• How to scroll in the center of notification without a mouse?

  How to scroll in the tray without mouse.  I can't see all of the items on today.

  Two fingers on the trackpad on my Mac of scroll scrolls up and down

• Fill a table from multiple threads

  Hello

  I tried to find the mechanism that I could use to fill an array of strings of multiple threads (a little and loops with different times, within a single process) in an asynchronous way.

  I went to create--> property/Invoke Nodes-> (...) but I could not find any properties/methods that I could use. Did I miss something?

  For example how programmatically insert item in array to the x position?

  I will use so semaphores or FGV would be enough?

  K

  
  

• SQL Toolkit crashing with multiple threads

  Hello everyone and happy new year!

  I was hoping someone might be able to shed some light on this problem. I update an older application to use multiple threads. In fact, the thread that is causing a problem now is created by using an asynchronous timer.

  I use CVI 2010, and I think the SQL Toolbox is version 2.2.

  If I execute a SQL statement from the main thread, there is no problem.

  stat = DBInit (DB_INIT_MULTITHREADED);
  
  hdbc = DBConnect( "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=sample.mdb;Mode=ReadWrite|Share Deny None" );
  hstmt = DBActivateSQL( hdbc, "SELECT * FROM SAMPLES" );
  
  DBDeactivateSQL(hstmt);
  DBDisconnect(hdbc);
  

  If I add code to perform the same duties in a reminder of the timer, it causes a stack overflow error.

  .. Start the main thread

  stat = DBInit (DB_INIT_MULTITHREADED);
  
  NewAsyncTimer (5.0, -1, 1, &gfn_quicktest, 0);
  

  .. end of main thread

  .. and then the reminder of the timer

  int CVICALLBACK gfn_quicktest (int reserved, int timerId, int event,  void *callbackData, int eventData1, int eventData2)
  {
    {
      int hdbc = DBConnect( "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=params\\sample.mdb;Mode=ReadWrite|Share Deny None" );
      int hstmt = DBActivateSQL( hdbc, "SELECT * FROM SAMPLES" );
  
     DBDeactivateSQL(hstmt);
      DBDisconnect(hdbc);
    }
  
    return 0;
  }
  

  The program crashes with a stack overflow error when the DBActivateSQL statement is called.

  I understand that the Access ODBC driver can not support multithreaded, but I only connect to this base starting from the same thread with these 2 statements only so it should be good?

  Any idea would be appreciated,
  Thank you
  Ed.

  I just tried this using the sample provided with CVI access database. It uses a DSN instead of mdb. It has worked out well. I see that no reason multithreading would be a problem here, if you open and close the connection in the same segment of code. I see that you use params in the asynchronous callback connection string. Where did this come from? Maybe try to use the database and see if it works.

• How can I define a multiple Services dashboard?

  Hello!

  I'm on the configuration of the systems and services Oracle EM11g. I was reading this doc page and saw this dashboard impressive to see multiple services at the same time. However, I do not understand how can I implement a dashboard like this, more than the photo shows his EM 10 g so I don't know if I'm running in circles for something that I can't accomplish in 11g.

  See you soon,.

  Nock

  Hi Mouad34rif,

  It's certainly something that you can accomplish in 11g, reports can be found/created and edited information reports Editor option in your main menu. documentation for it can be found here: Information editor

  R, Jürgen

• Problem with multiple threads

  I have a program that interacts with an ESX 3.5 server using the VIX API, written in c#. I'm from multiple threads in c# program with each thread running an automation process which creates a connection to a virtual machine on the ESX Server, some automated process, and then disconnects. I'm having problems with this. When I call Disconnect() from one of the threads, it seems to cause problems with my other son if they have not yet disconnected. I connect to an another VM on the server in each thread. The problem is if I don't call disconnect, I get errors, but if I call disconnect in a thread it causes errors. Y at - it something similar? Any suggestions on how to make this run smoothly? Thank you!

  This sounds a lot like you are getting hurt by the host sharing of handle.  If HostConnect() is called with the same parameters, the handle of the host gets reused.  HostDisconnect() will clean this handle, even if his commune.  It's actually documented behaivior.  We have also decided that there may problems like the one you have reached, so it will be removed in a future release.

  So your application will share the handful of host among all discussions, and as soon as we call disconnection, the host handles in other countries also becomes invalid.

  Make a unique HostConnect() and share this handle inside threads is a way to avoid this.  HostConnect() is generally quite expensive, so we recommend in all cases.

• How to scroll programmatically after requery

  Hi all
  
  We have a form that displays data in a table / grid format with a vertical scroll bar. The block of the "Number of records displayed" property is 30. Let's say that the user scrolls to form #40 (so scrolling the canvas happened already), performs a data entry on form #40 and click process. The button does two things:
  (1) call the PL/SQL procedure that updates some data that the form block is based on (this can update the file #41, #42, etc.).
  (2) update the block by running execute_query.
  
  The problem is when form refreshes, it resets the canvas view to save #1. The user complains that he needs to reach again file #40 to see the result of the update of the PL/SQL procedure.
  We tried to set the current record number to a variable before updating and using integrated go_record to go to that record. However, the view still looks the same. For example, before the update, canvas watch 32 to 62 record (form #40 is somewhere in the middle of the canvas view), but after go_record (40), canvas shows view from 10 to 40. The view is still not right.
  
  What we want, this is the update needs to keep the cursor in the same record (#40) and the folder must be at the same place in the grid as before the update.
  
  The block is on a table of contents (not bunk). How to scroll the table of content so that the user can see the same view as before the update.
  I tried to look at get_view_property, scroll_view, but always without success. Help, please.
  
  Thank you.
  
  Published by: rhew on February 17, 2009 21:10

  So, let try it with the built-in function Get_Block_Property ("block_name", TOP_RECORD) , then make a Go_Record with the given number.

  François

• How to move photos from multiple folders into one

  Hello!

  I exported photos of iPhotos to a folder on the Mac.

  He saved every moment in different folders.

  I want to combine them all, so that all the photos are in a single folder.

  How can I combine these multiple files from multiple folders into one?

  Thank you very much for your help!

  (PS next time I will not include fracture m´by moments, but for now, how do I fix?)

  Drag and drop one folder to the other.

• AppleScriptObjC and multiple threads

  Hello again people.

  I read some old threads here to have multiple threads in a Cocoa-AppleScript application, but I have not found any that I think that would work for my particular use case.

  Here's my situation: I have a method that expects that the user say a phrase and then runs another method when he hears the phrase. Here is the code that I currently use:

  on listenForQuery()
  set query to ""
          try
              tell application "/System/Library/PrivateFrameworks/SpeechObjects.framework/Versions/A/SpeechRecognitionServer.app"
                  set query to listen for {"Hello"} giving up after 5
              end tell
          end try
          if query as text is equal to "Hello" then my newQuery_(null)
          performSelector_withObject_afterDelay_("listenForQuery", missing value, 2.0) -- do it again every two seconds
      end listenForQuery
  

  AppleScriptObjC is not multi-threaded, but it seems that you forgot that it can use many of the classes and methods of cocoa.  Instead to use AppleScript to control another application, take a look at aid NSSpeechRecognizer in yours - you can give it a list of commands to listen and to define a delegate method that is called when something is recognized.

• How can I get a multiple scan of page rather than each page individually? Want D110, windows XP

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  Shlomi

• How can I do a multiple selection in Enum control or control of the ring or control Combo box

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     Boulder computer Maven
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  How can I unsubscribe from a thread

  Deric

  Hello Grandpa,

  In "unsubscribe", I assume you mean that you have opted for emails to you will be sent when someone relies on a thread? If this is the case open your profile and click the notifications identify the thread you are interested in and press the "stop messages" link on the right side of the wire. This will stop the sent emails.

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