print barcode labels using c# EBVN in Font

Painting PDF 417 in Font EBVN

EBVN
PDF-417 2d Barcode Creation In None
Using Barcode printer for Font Control to generate, create PDF-417 2d barcode image in Font applications.
www.OnBarcode.com
Make EAN13 In None
Using Barcode printer for Font Control to generate, create GTIN - 13 image in Font applications.
www.OnBarcode.com
CHAPTER 11 REST-BASED MODEL VIEW CONTROLLER PATTERN
Generating DataMatrix In None
Using Barcode maker for Font Control to generate, create Data Matrix 2d barcode image in Font applications.
www.OnBarcode.com
QR-Code Drawer In None
Using Barcode generation for Font Control to generate, create Denso QR Bar Code image in Font applications.
www.OnBarcode.com
Implementing an Asynchronous Parent Interface Instance The big challenge with implementing an asynchronous Parent interface instance is managing the results. With the asynchronous Parent instance, multiple threads will be representing multiple local clients, and each local client will be generating results that need to be handed off to the controller. Synchronization is required when multiple Command instances hand off their results to the Parent instance that is running on a different thread to the local clients. Following is the implementation of the asynchronous class, which inherits from the previously defined ParentBase class: public class AsynchronousParent extends ParentBase { private LinkedList _results = new LinkedList(); public void addResult(Result result) { synchronized( _results) { _results.addLast( result); _results.notify(); } } public Object getResult() { synchronized( _results) { if( _results.size() > 0) { return _results.removeFirst(); } else { try { _results.wait(15000); } catch (InterruptedException e) { return null; } if( _results.size() > 0) { return _results.removeFirst(); } else { return null; } } } } public AsynchronousParent() { } } The data member _results represents the list used to manage the results handed to the controller from the executing local clients. The method addResult is used to add a result to the list, and getResult is used to retrieve a result. Both the adding and removing from the list is embedded in a synchronized keyword, where the synchronization object is the list itself. Using the synchronized function in this way ensures that only one thread is adding or removing a result from the list.
Barcode Creator In None
Using Barcode encoder for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
GS1 128 Creator In None
Using Barcode drawer for Font Control to generate, create GTIN - 128 image in Font applications.
www.OnBarcode.com
EBVN
Draw Barcode In None
Using Barcode drawer for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
2 Of 7 Code Maker In None
Using Barcode drawer for Font Control to generate, create ABC Codabar image in Font applications.
www.OnBarcode.com
CHAPTER 11 REST-BASED MODEL VIEW CONTROLLER PATTERN
PDF 417 Maker In None
Using Barcode creator for Online Control to generate, create PDF-417 2d barcode image in Online applications.
www.OnBarcode.com
Paint PDF 417 In Visual Studio .NET
Using Barcode creator for Visual Studio .NET Control to generate, create PDF 417 image in .NET applications.
www.OnBarcode.com
An additional item to note is that the wait function with the value 15000 is used. Using the wait function is like using a Monitor in .NET. The wait function will wait to get pulsed, with the maximum wait being 15 seconds. A pulse is sent in the function addResult by using the notify method. The idea is that if there are no results to retrieve, the thread should wait a maximum of 15 seconds to retrieve a result. The strategy of waiting is part of the Persistent Communications pattern, in which the server will wait for a result to become available. Implementing a Synchronous Parent Implementing a synchronous Parent interface instance subclasses ParentBase and uses synchronization techniques, but in a different manner from the asynchronous Parent interface instance. The Parent interface instance instantiates the local clients and waits for all the Command interface instances to finish execution. During the execution, the Parent interface instance waits and does not accept further requests. In the synchronous implementation, the place where synchronization is needed is when the individual Command interface instances hand off results to the waiting Command interface instance. When the Command interface instance processes the results, all the Command interface instances have finished executing, and thus there is no concurrency. Following is the synchronous implementation: public class SynchronousParent extends ParentBase { private List _results = new LinkedList(); public synchronized void addResult(Result result) { _results.add( result); } public Iterator getResultsIterator() { return _results.iterator(); } public SynchronousParent() { } public void processRequest(Request request) { super.processRequest( request); Iterator iter = _runningThreads.iterator(); while( iter.hasNext()) { Thread thrd = (Thread)iter.next(); try { thrd.join(); } catch (InterruptedException e) {} } } } The SynchronousParent class has only one data member, _results, which is used to store the results generated by the Command interface instances. The method addResult is synchronized, allowing only a single thread to access the method and allowing only a single thread to add a result to the results list.
Print Barcode In None
Using Barcode generator for Office Excel Control to generate, create Barcode image in Microsoft Excel applications.
www.OnBarcode.com
Barcode Scanner In Java
Using Barcode Control SDK for Java Control to generate, create, read, scan barcode image in Java applications.
www.OnBarcode.com
EBVN
Recognizing QR Code In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
EAN 128 Printer In Visual C#.NET
Using Barcode creator for Visual Studio .NET Control to generate, create GTIN - 128 image in VS .NET applications.
www.OnBarcode.com
CHAPTER 11 REST-BASED MODEL VIEW CONTROLLER PATTERN
Create Matrix Barcode In .NET
Using Barcode creator for ASP.NET Control to generate, create Matrix image in ASP.NET applications.
www.OnBarcode.com
ECC200 Reader In C#
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
Look at the implementation of the method processRequest. The first call is to call the method super.processRequest, which translates to calling the ParentBase.processRequest method. The base class method implementation will start all the threads. Then, when the base class returns, SynchronousParent retrieves the Iterator instance to the currently executing threads. The method processRequest will use the iterator to iterate each thread ID and call the method thrd.join. Calling thrd.join will call the calling thread to wait until the thread referenced by the variable thrd has finished executing. The idea is to call the join method on each of the executing threads, and if all have been called, then no thread will be executing. Relating this back to the addResult method, what happens is that a caller of SynchronousParent will expect to execute all the Command interface instances. Let s call that the main thread. SynchronousParent then spawns a number of child threads. The main thread then waits until all child threads have executed. During the execution of the child threads, results will be added by using the method addResult. However, no results will be retrieved because the main thread is waiting for all the child threads to finish. After all the child threads have finished executing, the main thread returns control to the caller of SynchronousParent, who then proceeds to iterate the results. When the results are iterated, there will be only one thread accessing the data. This finishes the basic architecture of the REST-Based Model View Controller pattern. The last remaining piece is to implement the Java servlet. The implementation of the Java servlet will be broken into two pieces; one is used to handle asynchronous requests, and the other to handle synchronous requests. The implementation is broken into two pieces because of the complexity associated with the implementation. Remember from the architecture that the REST-Based Model View Controller pattern needs to implement the Permutations pattern. E B V N Combining the Permutations pattern with the asynchronous and synchronous implementations would be too much complexity in one explanation.
Encoding UCC.EAN - 128 In VB.NET
Using Barcode generator for .NET framework Control to generate, create GS1-128 image in .NET framework applications.
www.OnBarcode.com
EAN13 Creation In None
Using Barcode drawer for Excel Control to generate, create EAN-13 Supplement 5 image in Microsoft Excel applications.
www.OnBarcode.com
Encoding Code 128 Code Set C In Java
Using Barcode printer for Android Control to generate, create ANSI/AIM Code 128 image in Android applications.
www.OnBarcode.com
Denso QR Bar Code Printer In .NET
Using Barcode drawer for .NET Control to generate, create QR Code 2d barcode image in .NET framework applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.