AppleScriptObjC and multiple threads

Similar Questions

• 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.

• 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.

• Berkeley DB Java Edition - multiple threads accessing the database

  Hello
  
  I would like to access (read & write) a Berkeley DB of multiple threads (process/FMV anyway).
  
  Can I use a single com.sleepycat.je.Database object for all threads, or should I create an instance of each?
  
  Or is there another way to do it?
  
  Thank you

  The object database can be used by multiple threads, you can use a single instance or multiple ones, as suits you best. Of http://docs.oracle.com/cd/E17277_02/html/java/com/sleepycat/je/Database.html.

  The database handles are free of threads and can be used simultaneously by multiple threads. '

  If you read the javadoc, you can find any other comments on the use of the classes from multiple threads.

  Kind regards

  Linda

• 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.

• Violation of unique constraint in JPA in multiple threads

  I get the following error message when you use APP to create a record in my database:
  # < 14 October 2009 10:13:14 AM CDT > < Info > < EJB > < lharding pc > < AdminServer > < ExecuteThread [ASSET]: '3' for queue: '(self-adjusting) weblogic.kernel.Default' > < < anonymous > > < BEA1 003262EA920A3057A4BD > <>< 1255533194632 > < BEA-010227 > < EJB Exception occurred during invocation of home or business: weblogic.ejb.container.internal.StatelessEJBHomeImpl@589d49 threw the exception : javax.persistence.PersistenceException: Exception [EclipseLink-4002] (Eclipse - 1.1.0.r3338 - M8 persistence Services): org.eclipse.persistence.exceptions.DatabaseException
  Inner exception: java.sql.SQLIntegrityConstraintViolationException: ORA-00001: unique constraint (BDSS. CONN_USER_DOMAIN_STATE_PK) violated
  
  Error code: 1
  Call: INSERT INTO USER_CONTEXT_STATES (ID, TEMP_FLG, STATE_INDEX, LAST_SYNC_TS, USER_CONTEXT_ID) VALUES (?,?,?,?,?)
  link = > [12701, 100003, T, null, null]
  Query: InsertObjectQuery (oracle.bdss.datamodel.UserContextStates@a4af11) >
  
  
  I do the work of an EJB on Weblogic Server and I used the JDev "Entities of Tables" Wizard to generate the code for each table.
  
  The code works fine most of the time. However when there are multiple threads using the EJB, I think that the allocation of the sequence becomes the same set IDS on different threads. The Session Cache for my persistence has the default "(soft low)".
  
  Everyone seems it before and you know a solution?
  
  The annotations that I use for the generation of PK for the ID column (where the unique constraint is violated) are:
  
  @Id
  @Column (nullable = false)
  @TableGenerator (name = "UserContextStatesSeq", table = "SÉQUENCE",
  scheme = "SDE", pkColumnName = "SEQ_NAME,"
  valueColumnName = "SEQ_COUNT"
  pkColumnValue = "BDSS. USER_CONTEXT_STATES «(, allocationSize = 50).
  @GeneratedValue (strategy = GenerationType.TABLE,
  generator = "UserContextStatesSeq")
  Private Long id;
  
  
  The code for the EJB is shown below (only the relevant parts):
  
  
  @Stateless (name = "RuntimeEJBBean")
  @Local
  public class RuntimeEJBBean
  implements RuntimeEJBLocal
  {
  @PersistenceContext (unitName = "persist")
  Private EntityManager em;
  
  public RuntimeEJBBean()
  {
  }
  
  Private Sub createNewContextState()
  throws the Exception
  {
  NewState UserContextStates = null;
  Try
  {
  newState = new UserContextStates();
  EM. Persist (newState);
  ...
  EM. Flush();
  catch (System.Exception e)
  {
  ...
  }
  }

  According to your annotation you use table named SEQUENCE to generate the id I suggest switching to sequence if you use Oracle.

  So instead of

  @TableGenerator (name = "UserContextStatesSeq", table = "SÉQUENCE",
  scheme = "SDE", pkColumnName = "SEQ_NAME,"
  valueColumnName = "SEQ_COUNT"
  pkColumnValue = "BDSS. USER_CONTEXT_STATES «(, allocationSize = 50).
  @GeneratedValue (strategy = GenerationType.TABLE,
  generator = "UserContextStatesSeq")

  use

  @SequenceGenerator (name = "UserContextStatesSeq", sequenceName = "USER_CONTEXT_STATES_ID", allocationSize = 1)
  @GeneratedValue (generator = "UserContextStatesSeq")

  and db to create sequences:

  CREATE THE SER_CONTEXT_STATES_ID MINVALUE SEQUENCE 1 WITH AN INCREMENT BY 1 1 COVER 50 ALL;

  allocationSize = 1 in @SequenceGenerator with CACHE 50 in phrase makes any id generation caching done at Oracle no ORM.

  If go to the sequence isn't an option, I would check if all error a bind ID with values such as XXXX01 or XXXX51. If Yes, then taking into account the fact that you have allocationSize = 50, it would mean that EclipseLink does not correctly synchronize award of the new id if that's the case then maybe change allocationSize 1 would help.

• Homegroup and multiple user account problems

  I have been searching the net for information and can't find anything that matches.  I'm having all kinds of problems through the homegroup and multiple user accounts.

  I would like to know: when a machine (laptop in this case) is off the network, the individual user accounts will remain visible under homegroup?

  If they are not, then homegroup is not for me.

  UPDATE and closing:

  I confirmed that the individual accounts of the user on a machine that visible to another when this computer is connected to another group residential computer on a local network domestic.  Why they don't look just like a homegroup internally I don't get except that the machine would always be part of a group residential e.g. a laptop, as in my case, would be carrying a homegroup with it and not be able to jump on another residential group in a different location.

  What was causing me a lot of trouble has AVG Free.  Attention, the installation of AVG Free homegroup PCs cannot meet or is inconsistent at best.  My laptop would show the user accounts, but not the other homegroup PCs and both could indicate that there is no other available HG machine or sometimes invites you to create a homegroup.  It was a nightnare.

• ScheduledThreadPoolExecutor with minimum and maximum thread

  Hi all
  
  I need to implement something that is planning a number of potentially important small tasks over time. I would use a pool of threads to do this in an effective manner. I wish to have a configuration, for example, 1-10 of discussions where the threads are created as needed and if the number of threads max is reached, tasks are queued. The tasks are timed and repeat if I prefer the automated programming of the executor. The deployment environment and the number of tasks to manage will vary so adaptation of configuration and execution is important. When there is no work, I would like to scale down over time as well. Here is my small tent to reach a suitable with competition from Java API design...
  
  Now, looking at my options, it seems that ScheduledThreadPoolExecutor is a good match for my needs. So what I would like to implement is a mechanism to define the minimum and maximum number of threads that are created for the thread pool. I understand that it is the number of threads of"base" and the maximum number of threads in the java.concurrency terminology. However, I struggle to create what I would.
  
  It seems to me that the ScheduledThreadPoolExecutor is always created as a fixed size thread pool. So I can't set that I would have say minimum of threads 1 and a maximum of 10. There is the setMaximumPoolSize() method, I can call on the executor, but he seems to have no effect. If I create my own ThreadFactory, and use that to give me track when new threads are created, create a ScheduledThreadPoolExecutor with one set of threads 1, fixed the limit 2-wire and plan a set of 6 ongoing tasks in loops, it never starts higher than 1 threads. So it seems that it completely ignores the setMaximumPoolSize().
  
  There is the option to call allowCoreThreadTimeOut() and setKeepAliveTime() on the executor. When I look in the code of ScheduledThreadPoolExecutor, I also see that he prestarts always all discussions until number of threads core set when a task is scheduled. So even if I got the coreThreadTimeout and keepAliveTime for work, attributes that can not help me because it would always just he hike up base number. Otherwise maybe I could use that have a 0 min and max of the number of"basic". Or is the coreTimeOut for some other purpose?
  
  Well, the question of the "base" here is, is it possible I could create an executor who creates a number dependent threads according to the need (between x 1 and x 2 that I would define, for example, 1-10) but achieved x 2 at the start of the queue of tasks that come? It seems that the whole API is to assume I want either a fixed number of threads with the unbound queue or an unlimited number of threads with a queue bound. No way to have a set bounded discussions with min and max thread bodies, as well as the queue without terminals when the max thread count is reached? And can I get that with ScheduledThreadPoolExecutor enough, please?
  
  Or maybe I'm just the idea of simultaneity just bad here for somewhere? Is a kind of best practices of competitive access to pigs immediately the maximum number of threads, you think you might need later conflicts of resources? This is why there is only the size of the "fixed"? In all cases, ideas and help is appreciated.
  
  Well thanks for reading this far... and all answers of course!

  Yes, this particular scenario is difficult to achieve, and Yes, it seems that the standard behavior for me as well. You can sort of achieve this effect by using the feature "allow core of timeout threads. Basically, build you a pool of 'fixed' size with a queue boundless, but the flag 'allow the kernel thread timeout' set to true. This will essentially give you what you want, except that the 'min' size is 0. This seems to be a reasonable compromise to me because you do not need to write custom code (I had already implemented a scenario you describe, a queue of unlimited blocking which 'lies' to be full until the maximum pool size is reached).

  example:

          ThreadPoolExecutor executor = new ThreadPoolExecutor(maxPoolSize, maxPoolSize,
                                                               60L, TimeUnit.SECONDS,
                                                               new LinkedBlockingQueue(),
                                                               threadFactory);
          executor.allowCoreThreadTimeOut(true);
          return executor;
  

• You bird 31 crashes when you reply to an e-mail from multiple threads

  I've updated to version 31 today. Since then, when replying to emails that have several threads (2 or 3 responses attached) the Send button hang up. If I wait long enough, or violin, it can go to the project. Why? What can I do to get this kind of threaded replies to send as an e-mail from original naked base?

  Davidk03

  do not plug into something new, I asked if you had it that it sounded like you did. You asked what it was that has basically answered my question, but I have provided a link to answer your question of what is.

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  Disable e-mail analysis:-almost all of the programs anti-virus mail as well as falling out.

  No one else has reported the problem, so unless your ready to work through the process and exactly what it IS your destiny to never upgrade to a newer version. Never. The question is no longer not studied before by someone, unless you have be it resolved.

• How can I create multiple threads parallel programaticaly?

  Hi all!

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  But my problem is that the user will select the number of threads in parallel will start, depending on the type of equipment!

  I created a reentrant VI which loops until a global goes wrong.

  An another GUI VI, the user inserts a number random, example 3, and in the GUI VI, I create 3 threads running through the reentrant VI.

  In GUI VI, I used a loop to "Reference Open VI", build an array of references to the first reentrant VI and then I tried to run by using "Call By Reference" in another loop, but only the first VI is running.

  By placing "Call by reference" three times in the GUI VI, all works well because the reentrant VI is cloned three times and parallelism is offered, but I need to establish the number of clones per programming.

  Is there a way to clone screws when running? Or... there at - it a different approach for this task?

  Thank you!

  Tiberiu

  Tiberiu salvation,

  without the while loop is no problem, but you should load the vi dynamically. See the attached picture. You can set all controls with the invoke node.

  Mike

• Vista and multiple monitors

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  Good luck!

  Lorien - MCSA/MCSE/network + / has + - if this post solves your problem, please click the 'Mark as answer' or 'Useful' button at the top of this message. Marking a post as answer, or relatively useful, you help others find the answer more quickly.

• BlackBerry Smartphones BB Torch - deletion of files and multiple records

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• FWSM and multiple-vlan-interface command

  Hello

  I am due to configure a FWSM in an IOS 6513 running, I suppose that the example configurations are quite similar, when you use an MSFC, but I have a question.

  I have 3 inside VLANs, configure 3 LAN interfaces VIRTUAL with IP addresses (as a default gateway for hosts on 3 VLANs), then set up another VLAN separated for a "next hop" between the router and the inside deals with the interface of the FWSM, put the IP on the router from VLAN and FWSM inside?

  I tried this on a test set up and it seems to work but when I ping one external host through the FWSM I couldn't see not all packages using DEBUG ICMP TRACEL, PING did stop working when I removed the ACL on the FWSM inside the interface.

  I used the command INTERFACE MULTIPLE VLAN FIREWALL but after reading all the documentation I think now that I'd rather avoid this command.

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  Any help appreciated

  Regards Tony

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  Hope that helps to explain the questions a bit.

  Scott

• BSOD "driver irql not less or equal" and the "thread of unhandled exception" messages

  Hi all

  Since I got my laptop motherboard replaced I started having BSOD issues with "driver irql not less or equal ' and"unhandled exception thread"messages. They appear very often (about once a week), but it's annoying anyway :) I failed to note any regular pattern in BSOD problem.

  I've read the description of similar problems, so I guess that the problem is a faulty driver. Unfortunately my PC skills are not sufficiently advanced to solve the problem on my own.

  Operating system

  64-bit Windows 8
  CENTRAL PROCESSING UNIT
  Intel Core i5 3210M @ 2.50 GHz 61 ° C
  Ivy Bridge 22nm technology
  RAM
  6,00 GB Dual-Channel DDR3 @ 665 MHz (9-9-9-24)
  Motherboard
  Acer VA50_HC_CR (U3E1)
  Graphics
  Monitor generic PnP (1366x768@60Hz)
  Graphics Intel HD 4000 (Acer incorporated [ALI])
  Storage
  465 GB TOSHIBA MQ01ABD050 (SATA) 39 ° C
  Optical drives
  HL-DT-ST DVDRAM GT70N
  Audio
  Realtek High Definition Audio

  Antivirus: Kaspersky Crystal

  The Minidump files: https://onedrive.live.com/redir?resid=A32073C9ADCE674! 106 & authkey =! AEZQAT-sNxtbU1Y & ithint = the file % 2crar

  Thanks in advance.

  The debugging session: killed Sep 16 01:29:43.916 2014 (UTC - 04:00)
  System Uptime: 0 days 0:30:20.630
  Loading the kernel symbols
  ...............................................................
  ................................................................
  ............................................................
  Loading user symbols
  Loading unloaded module list
  .......

  Use! analyze - v to obtain detailed debugging information.

  BugCheck D1, {b, 0, 0, fffff88005abf4b6}

  Cannot load the image \SystemRoot\system32\DRIVERS\athw8x.sys, 0n2 error Win32
  WARNING: Unable to verify timestamp for athw8x.sys
  ERROR: Module load completed but symbols can be loaded for athw8x.sys
  Probably caused by: athw8x.sys (athw8x + 684b 6 )

  Follow-up: MachineOwner

  Atheros Wireless LAN Driver Update.

  Loaded symbol image file: athw8x.sys
  Image path: \SystemRoot\system32\DRIVERS\athw8x.sys
  Image name: athw8x.sys
  Timestamp: Thu Jul 24 11:44 2012 (500EC2C0)

  First try ACER Support.

  http://us.Acer.com/AC/en/us/content/drivers

  Description of the driver: Atheros Wireless LAN driver

  Driver update site: http://www.Atheros.cz/