Designer - asynchronous vs synchronous

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• Daisy chained multiple external hard drives

  Can I split my files pictures to several external hard drives.  My iMac is completed and I am on a budget.  I found a good deal on 500 GB FireWire external drives.  My library approaching the 500 GB and if I put it on an external drive and Garland a 2nd drive Apple Photos bed together?  I want to open the Photos app and see all my photos. And if he will only read 1 player both what it will look like?  How can I find a photo quickly if it is not on the current drive that I consult?  I was wondering if someone another daisy chained photo readers and what it will look like?

  JimboP wrote:

  Can I split my files pictures to several external hard drives.  My iMac is completed and I am on a budget.  I found a good deal on 500 GB FireWire external drives.  My library approaching the 500 GB and if I put it on an external drive and Garland a 2nd drive Apple Photos bed together?  I want to open the Photos app and see all my photos. And if he will only read 1 player both what it will look like?  How can I find a photo quickly if it is not on the current drive that I consult?  I was wondering if someone another daisy chained photo readers and what it will look like?

  You use IPHOTOS or PHOTOS and what version of the operating system.

  You can have several libraries in IPHOTOS and PICTURES (in the pictures that only your library designated system is synchronized with other devices via ICLOUD).     You can split the libraries of useful information - like a vacation, family events, pictures of your pets.

• Screw vs Express SoftMotion function blocks

  Hello

  Are there differences between express screw SoftMotion function blocks? I intend to drive a servomotor through a NI 9505. Examples AND show how using function blocks, but I've been advised to use the screw Express instead, work around odd behavior when using a simulated axis (http://forums.ni.com/t5/LabVIEW/SoftMotion-quot-Update-Buffer-quot-VI-refuses-to-take-more/m-p/22508...

  Thank you!

  Hi JKSH,

  If I booted up a new application, I would use screw Express on function blocks. Here is a list of things to consider when choosing:

  1. By default, function blocks are asynchronous. They run on the rising edge of the entry "run" and are carried out when the output "done" is high. They do not block and function block architecture will almost always call the same function blocks again and again in a loop. You control the flow of execution with the 'run' and 'done' entry and exit. Screw Express, on the other hand, are synchronous by default. They don't have an entry not "run" and instead start running as soon as they are called. They block also until the end screw Express can be converted to asynchronous by right-clicking on them and by changing the "calendar model. When you change the calendar in asynchronous model, the Express VI will now act exactly like a function block.
  
  
  2. In general, you should never mix asynchronous and synchronous API. Your application should be one or the other. If it is possible to have safe synchronous and asynchronous calls, you must be very careful and really know what you're doing.
  
  
  3. To my experience, write simple applications is easier with a synchronous API, and more complex applications are better suited to an asynchronous API. Since blocking synchronous calls, you need more loops in your application and it can become difficult to maintain.
  
  
  4. There is also the property node / API call, on which are based the functional blocks and screw Express. You can do a right click on a function block or Express VI and convert it into a Subvi to see the underlying code. Then the function blocks and screw Express can be pleasant to work with, you must sometimes lower level control that is offered by the property and invoke nodes.

  I looked at your other post and it seems that you meet one of the intricacies of asynchronous calls. In point 1 above, I mentioned that function blocks increase sensitive edge on the execute line. In your modified sample and the original sample, the 'Update buffer' function block is executed when space becomes higher or equal to the "size of the Contour data. In the original example, the size of the table is 40, but in your example, it is 100. We will follow the stream through the example:

  1. We do nothing in the first round since we do not see a rising edge of the signal "run" "Initialize the buffer" until the second iteration.
  
  
  2. At the beginning of the second iteration, we initialize the table with 20 points, leaving 20 spaces available. This function block can take more than one iteration to complete, so that the loop can run several cycles before the release of "Done" is set to true. In this case, the next block runs.
  
  
  3. Then we start the move of contour. No point is taken in the buffer zone This occurs in the part of the user rather than the scan code.
  
  
  4. Then, we see that there are 20 spaces available, so we add more than 20 points to the buffer, leaving us with 0 beds available. This means that in the next iteration of the loop, the signal "run" function block 'Update buffer' will be false. This is essential to the functioning of the example.
  
  
  5. Since there is no abandonment called, we have a loop around back.
  
  
• Each scan, SoftMotion takes a point in the buffer zone. Finally, the number of available points will be 20. When this happens, the entry "run" will switch from false to true on the 'Update buffer' function block and 20 points more will be added to the buffer. This cycle continues until you stop.

So, what was wrong with your changes? You did the size of the table 100 points. If you look at the steps above, you will see that in the example, we have 40 points in the buffer before taking points. If you increase the size of the table to 100, it means that there are 60 places available. However, 60 is always higher than the "size of data contours" (which is 20) and so the entry "run" function block 'Update buffer' will never wrong; We have always more available space than the "size of data contours. Since "run" is sensitive edge up, we are never really new data in the buffer, and so you get only two cycles that you initially put in. I agree that it is difficult, but it's exactly as function blocks are supposed to work and are certainly something to think about when you use the asynchronous API.

Thank you

• VISA writing differs between TS and LV Run - Time Engine development agencies

  Hi all

  I made a request on LabVIEW to test the BERs (Bit error rate), and I used the Write VISA between two COM ports to Exchange data.

  Everything works great using just of LabVIEW.

  Later, I used TestStand to call my application (VI). Adapters of LabVIEW TestStand have been set by default on the development system , and everything works OK!

  Finally, I had to disable the development system and to define the types of adapters LabVIEW of TestStand for LabVIEW Run-Time Engine and I noticed that the speed of the exchange of data between two COM ports significantly decreased.

  The only difference was the speed... because all data (changed slowly in this case) happened correctly on the other COM port too.

  The symptom was the same that decrease baud rate... but baud rate and all other configurations remained the same. The only difference was the change between the development system for the runtime to notice this reduced speed between the data exchanged using VISA Write.

  All the solutions for this?

  Thanks in advance

  João

  Hi all!

  I'm sorry, I forgot to reply to this thread...

  Solution was change the way VISA WRITE of "asynchronous" to "synchronous" to book a thread just to WRITE visa.

  The problem here was something like this (?): TestStand used all available threads and when we wanted to WRITE of VISA, the thread has been busy and VISA would wait until the wire emerges. After changing to syncrhonous, there was a thread dedicated to this process (?).

  Now, everything works the same using LabVIEW Run-Time Engine or system deployment.

  Thanks for the help Chris and Norbert :-)

  João

• Download the file in a thread

  After a bit of a struggle, and with the help of a counselor I got labour code for the download of a zip file. On the ripple, the download takes about 14 seconds. I guess it takes longer on a device.

  So, I definitely want to do this in seprate thred to not lock the GUI.  The code that got us to the DOM object so I can't use a thread with a 'worker '. DOM is not thread-safe.

  Any suggestions anyone?

  Solution.  Using XMLHttpRequest asynchronous param 'true '.

  the blob value and write to the file system. The download will asynchronous and synchronous write file

  The code below is a bit messy with debugging and also failure unzip code but I think the general idea is clear enough

  There is a warning for 'arraybuffer' saying to use instead of 'ArrayBufferView' but 'ArrayBufferView' is not supported

  var myblob;
   
  Service (myURL) DL5
  {
   
  XHR = new XMLHttpRequest();
  XHR. Open ("GET", myURL, true ");  Asynchronous.
  xhr.responseType = "blob";
  xhr.responseType = "arraybuffer."
  xhr.responseType = "ArrayBufferView";         Not supported?
  var builder = new WebKitBlobBuilder();
  XHR. OnLoad = function (e)
  {
       
  Builder.Append (XHR. (Response);
  object blob var = builder.getBlob ("config.zip");
      
  myblob = new Blob ([xhr.response], {type: "zip"});

  If (onSuccess)
  {
  onSuccess ("Download OK!");
  }
  };
  XHR. Send();
  }

  function onSuccess (mess)
  {
  alert (mess);
  DLX();
  }

  function DLX()
  {
  requestFileSystem = window.requestFileSystem | window.webkitRequestFileSystem;
  BlackBerry.IO.sandbox = false;
  requestFileSystem (window. PERSISTENT, 10 * 1024 * 1024, onSuccess2, onError2);
  }
  function onError2 (e)
  {
  Alert ("File system failed" + e);
  }

  function onSuccess2 (fs)
  {
  Alert ("in Success2");
  fs.root.getFile (blackberry.io.home + "/ config.zip", {create: true}, {(fileEntry) function)
  fileEntry.createWriter (function (f)
  {
  f.onwriteend = {function (event)}
  Alert ("fine writing");
                  
  txt var = community.unzip.unzipPackage (blackberry.io.home + "/ config.zip", blackberry.io.home/+ "/ decompress");
  var JSONobject = eval (txt);
                  
  Alert ("unzip");
  };
  f.OnError = {function (err)}
  Alert ("error of writing");
  };

  f.Write (myblob);
  Alert ("file saved!");
  }
  )
  }
  )
  }

• How to set the timeout property Web Service partner link in the new version of the SOA Suite, it is missing

  Hello

  I have a use case in which I'll call synchronous external Web Service and the form of this service, I get the answer after 80 seconds.

  I know that this console form EM soa-infra-> SOA Administration-> BPEL proprieties-> under 'more BPEL Configuration Properties..' in SyncMaxWaitTime can I change the default 45 second in 80 seconds, but it will apply to all synchronous services in this area, and I want only the value appeal of Web Service of particular external reference (link partner).

  For the limit of timeout for the particular web service (partner of external reference link):

  I saw a post at < http://www.mandsconsulting.com/asynchronous-vs-synchronous-bpel-processes > in which there is an option in 'Link partner Edit' form property tab dialog box, we can add "timeout" property but in SOA Suite11.1.1.7 I am not able to find this property form the list.

  on this post < http://abhishek-soablog.blogspot.in/2010/06/timeout-for-partnerlink.html > is also described the same way, but it's just the source code of the highest way of GUI to set the timeout property and it does not work with a new version.

  Can someone please tell me in a new version (11.1.1.7) of SOA suite, which is how to set the timeout for the particular web service (partner of external reference link).

  Thank you

  Can someone please tell me in a new version (11.1.1.7) of SOA suite, which is how to set the timeout for the particular web service (partner of external reference link).

  VR;

  Click em-> composite-> Services and references-> select need to reference and click on-> properties: 'HTTP Timeout of read' and 'HTTP timeout.

  developing composites:

  Click on a reference-> property inspector-> link properties-> plu green and add oracle.webservices.httpConnTimeout with the necessary value and oracle.webservices.httpReadTimeout with the necessary value

  for the same domain defined: oracle.webservices.local.optimization = false

  You can watch

  Administration of Web Services - 11g Release 1 (11.1.1.7)

  How to set a timeout for a Web Service in SOA 11 g (Doc ID 979683.1)

  SOA 11 g: political malpractice not to intercept 'service Endpoint unreachable' error (Doc ID 1503989.1)

• How to choose a queue messages after a time interval specified OSB 11 g

  We designed asynchronous OSB services using JMS queues. Whenever there is a problem with the target system, we put these messages to a different queue (called error queue).
  
  Could you please let me know how to send the normal queue these queue error messages after a specified period of time (say 2 hours)?
  
  Help, please.
  
  Kind regards
  Neeraj

  Another is to set to the queue of the error queue-> substitutions--> 'Override of time to deliver. " It is the delay in the millis.
  Have a service proxy consuming the error queue and return the message to the normal queue.

  By doing this, the proxy will always listen queue, but it will not pickup the message until the delivery time is reached.

  Kind regards
  Fabio Douek

• B2B-51566 with DND reception

  Hi all
  
  I have the following error when I received an MDN of my partner.
  You have an idea?
  
  < exception xmlns = "http://integration.oracle.com/B2B/Exception" xmlns: xsi = "http://www.w3.org/2001/XMLSchema-instance" > []
  < correlationId > < / correlationId >
  < b2bMessageId > 0AFF003112F730168DD0000013E8B554 < / b2bMessageId >
  < errorCode > B2B-51566 < / errorCode >
  < errorText >
  <! [CDATA [error of flow analysis
  []] >
  < / errorText >
  < errorDescription >
  <! [CDATA [Info Machine: (dev-soasuite)]]
  Description: Stream parsing error from the
  []] >
  < / errorDescription >
  < errorSeverity > 2 < / errorSeverity >
  < Microsoft.PowerShell.Commands.GetChildItemCommand >
  < name = "b2b.messageId parameter" value = "0AFF003112F730168DD0000013E8B554" / > "
  < name = "b2b.toTradingPartnerId parameter" value = "Fluid" / > "
  < name = "b2b.toTradingPartnerIdType parameter" value = "Name" / > "
  < / errorDetails >
  < / exception >
  ]]
  [2011 04-20 T 15: 02:42.926 + 02:00] [soa_server1] [TRACE] [] [oracle.soa.b2b.engine] [tid: weblogic.work.j2ee.J2EEWorkManager$WorkWithListener@1476c258] [username: < anonymous >] [ecid: fd0b64908a2ee5ca :-86ee037:12eb9e4ec40:-8000-00000000003e260e, 0] [SRC_CLASS: oracle.tip.b2b.system.DiagnosticService] [APP: soa-infra] [SRC_METHOD: synchedLog_J] Notification: notifyApp: queue the exception message: []
  < exception xmlns = "http://integration.oracle.com/B2B/Exception" xmlns: xsi = "http://www.w3.org/2001/XMLSchema-instance" >
  < correlationId > < / correlationId >
  < b2bMessageId > 0AFF003112F730168DD0000013E8B554 < / b2bMessageId >
  < errorCode > B2B-51566 < / errorCode >
  < errorText >
  <! [CDATA [error of flow analysis
  []] >
  < / errorText >
  < errorDescription >
  <! [CDATA [Info Machine: (dev-soasuite)]]
  Description: Stream parsing error from the
  []] >
  < / errorDescription >
  < errorSeverity > 2 < / errorSeverity >
  < Microsoft.PowerShell.Commands.GetChildItemCommand >
  < name = "b2b.messageId parameter" value = "0AFF003112F730168DD0000013E8B554" / > "
  < name = "b2b.toTradingPartnerId parameter" value = "Fluid" / > "
  < name = "b2b.toTradingPartnerIdType parameter" value = "Name" / > "
  < / errorDetails >
  < / exception >

  ' AS2 - to ' and 'AS2 - to "headers are missing and as a result, it fails in B2B. These are the required headers and should be present in all AS2 including MDNs messages.

  For details, see RFC 4130 Section 6.2.

  The content below is taken from the RFC 4130 AS2,

  AS2-to and AS2-mind fields MUST be present in all the AS2 and AS2 MDNs asynchronous or synchronous in nature, with the exception of DND asynchronous messages, which are sent via the SMTP Protocol.

• Need a try/catch, but IOErrorEvent does not seem to support...

  I am loading a remote image using a charger and where the image is missing I want to replace the missing image with a placeholder image generic.  Normally, a try/catch construct would be perfect for this.  But with charger, he lifts an IOErrorEvent which then calls another function, and I'm then thrown out of the context of my original function, so I can't easily do what I have to do.

  Any ideas on how to work around this problem?  I have trouble understanding why some classes use try/catch, while others throw error events.

  Thank you!

  you will need to use an ioerror event handler.

  and the difference between your mistake and likely errors in try/catch is the difference between asynchronous and synchronous errors

• Difference between synchronous and asynchronous service (Process BPMN).

  When we create new BPM process jdeveloper gives 4 options including easy and synchronous service.

  I want to know how they differ logically because the two models look same!

  In an asynchronous process, the starting node is exposed as a "unique sense", so if you see the wsdl for this (port type section), you will see only the entries and no results. This means that the appellant is not expected that the process at the end. In a synchronization process, the web service to the starting node interface is "track two", request/response...so you will see both and input and output in the section type of port. the appellant awaits the response of the process.

• Synchronous vs. asynchronous

  Hello
  
  I get request timed out of exception when you call a Synchronous BPEL service asynchronous BPEL service.
  
  Am in the phase of recognition and created an asynchronous bpel with a delay of 5 seconds and named using a synchronous BPEL but still am getting an error timedout
  The process called async is finished after a wait of 5 seconfs, but even in this case the synchronization process is waiting for the answer
  
  All citing the same asynchronous service using an another async bpel service its works very well.
  
  why I get this error while an async bpel service is called using a synchronization service
  
  Please help me understand

  Large.
  If you can mark my answers as useful or response please.

  See my explanation here:
  Re: Unable to receive the message of an asynchronous service - BPEL

  Arik

• Difference b/w WebService synchronous and asynchronous WebService?

  Hello friends... !
  What are the main differences b/w WebService synchronous and asynchronous WebService? What is the information essential to their topic about SOA?

  Hello

  There is no difference between Asynch and sync in terms of flow, or good business logic
  the only difference is in web synchronous service feels the responsibility to give the answer to the applicant
  but asynchronous, you call the web service to give the answer...

  more there is a limit for a time limit for the bpel process to be carried out for synchronous. . but is not asynchronous. .

  There is also a slight difference in the wsdl. .

  Try it for yourself. .

  Thank you

• Synchronous and asynchronous BPEl process

  Hi all
  
  1. when we can create a synchronous bpel process
  
  2. when we create a synchronous bpel process
  
  3. when we can create empty bpel processes
  
  4. how to deploy a project using a script? with the example.
  
  Thanks in advance...

  4. how to deploy a project using a script?
  http://jianmingli.com/WP/?p=2584

  1. when we can create a synchronous bpel process
  Synchronous process must create in case if you expect the answer immediately.
  e.g. it is useful in case if you use a card database as partner link in the BPEL process. Because the data base of operation of the adapter used to give the answer immediately.

  2. when we can create asynchronous bpel process
  Asynchronous process must create in case if you when will come answer are not have limitation in time.
  Example:-assume that if you have a single loan process in which we are citing some of the webservices (ex-United Star ready, loan HDFC) who will send interest charges in its response, but in this case the answer can come at any time. Until that time there need to wait an indeterminate BPEL process. If the BPEL Sync process will be used in the above case, then the BPEL process will expire and which will report to the failed State.

  3. when we can create bpel processes empty
  Define the Service later: Select this option to create an empty BPEL process service component without activities.

• SQL for the synchronous question of AIR vs. asynchronous

  Gidday guys

  I've implemented a SQLite database that will be processing up to 150 000 lines at the same time.  I use parametized queries, wrapped in a transaction, it should be fast enough. I use asynchronous methods.

  I put the motions and managed to get a static test of query in the database using the parameters.  Wahooo!

  However, now I did it dynamic to receive bulk data, I get the error:

  "Operation could not be performed SQLStatement.executing is true.

  I wonder if anyone can

  (a) suggest that synchronous may be a better option

  or

  (b) guide me as to what order the functions and event listeners would fix my follows established...

  THE PROCESS:

  -J' have a lot of file names in an array, that need to be tweaked before thrown into the database

  -J' set up the sql (leg work done earlier) connection, the query statement, and then start a transaction:

  insertStmt.sqlConnection = conn;

  insertStmt.text = "INSERT or IGNORE INTO tester3 VALUES (@col1, @col2);

  Conn.Begin ();

  -table is thrown into a function that starts an enterFrame iteration (if the display does not freeze), where I change the names of files, and put each file name twisted and other (also directed for the database) data in an object and deliver it to the function that prepares the data in the settings...

  prepareParameters ({col1:col1var, col2:col2var});})

  prepareParameters(row:Object):void

  {

  [insertStmt.parameters["@col1"] = row.col1;

  [insertStmt.parameters["@col2"] = row.col2;

  insertStmt.execute ();
  }

  -at the end of the loop table, call the transaction end function

  I think the problem is that the loop sends the next object to prepareParameters() until the database has finished executing the last insert statement.

  I tried to configure a listener for results to try to make Flash do not return to the loop until the listener received something, but I get the same error.

  My first thought was "Hey, shouldn't Flash wait until after insertStmt.execute ();" has finished before returning to the loop that calls its function? But maybe this happens in synchronous treatment?

  Thanks for your thoughts guys.

  Before I head to a few races a couple quick notes.

  If you just want a quick number of items affected in the database across all executions altogether (although SQLConnection is maintained), you can use this property:

  http://help.Adobe.com/en_US/FlashPlatform/reference/ActionScript/3/Flash/data/SQLConnectio #totalChanges n.html

  To be more practical, SQLResult can be used on a SQLStatement instance after it is over (after the RESULT event). If you do not want to use it (as in the example above) in the manager function, _runQuery. The SQLEvent sent to method (apart from the first _runQuery (null)) will contain a reference to the SQLStatement instance that has been run. You can see me access it explicitly to remove the handler from the success of it as follows:

  If (e)

  {

  SQLStatement (e.taget) .removeEventListener (SQLEvent.RESULT, _runQuery);

  }

  Which is simply check to see if I have a valid (non-null) event sent to the method and if yes I use it to remove the handler. I could use a weak reference in the event handler, but on devices, I would be extremely explicit in removing all memory that I absolutely is useless as soon as possible.

  That said, each SQLStatement has getResult() method:

  http://help.Adobe.com/en_US/FlashPlatform/reference/ActionScript/3/Flash/data/SQLStatement .html #getResult ()

  That method contains the method, you asked:

  http://help.Adobe.com/en_US/FlashPlatform/reference/ActionScript/3/Flash/data/SQLResult.ht ml #rowsAffected

  It's just the number of rows affected by your last statement (UPDATE, INSERT, DELETE,...). If you want to follow him through multiple SQLinstructions you could do a new class var to collect the results, if you do not use SQLConnection totalChanges I linked above:

  If (e)

  {

  get an official reference

  var insertStmt:SQLStatement = (e.target) SQLStatement;

  results of this execution

  var result: SQLResult = insertStmt.getResult ();

  draw some properties of an "INSERT" as you do

  trace ("Insert ID:" + result.lastInsertRowID + ", affected rows:" + result.rowsAffected);

  If you perform the UPDATE/DELETION there are .data with an array property

  all the results that you can browse, exhausted for example length of results

  (just treat it as type Array and iterate over it if you wish)

  trace ("result Total SQL statements:" + result.data.length);

  remove the listener

  insertStmt.removeEventListener (SQLEvent.RESULT, _runQuery);

  }

  Keep in mind, it's TO-achieve, not a total. This allows you to review the results of each "single" execute() that you are running. You can search for questions or to check the validity of the data, etc., on each function execute(). If you don't really care that then just check the _sqlConn.totalChanges for one number for everything that moved the database runs.

  Don't forget to close the connection of _sqlConn after all function execute() statements look the next time you run queries, it resets the totalChanges. Also on something like a DELETION * a SQLResult returned 0 results. It is mentioned in the documentation, read paragraph 3 on the addition of a 'WHERE 1 = 1' just to get results to fill:

  http://help.Adobe.com/en_US/FlashPlatform/reference/ActionScript/3/Flash/data/SQLResult.ht ml #rowsAffected

• DBMS_CHANGE_NOTIFICATION - synchronous or asynchronous?

  I couldn't find the information how the change notification mechanism is being implemented. It is synchronous as triggers or asynchronous as from newspapers in recovery? The important thing is that I don't want a user to wait that the Reminder Manager has completed its work.
  
  Someone knows something about this, or has any idea where I could find this information?

  From Tim Hall article: http://www.oracle-base.com/articles/10g/dbms_change_notification_10gR2.php

  "Notifications are processed asynchronously, it may take a few seconds for them."

  That seems plausible to me, since you need to set job_queue_processes to value non-zero.

  Kind regards
  Rob.