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The DBConnectionSingleton Class

The DBConnectionSingleton Class The DBConnectionSingleton class is the implementation of a database connection-specific object pool. The main purpose of this class is to provide database connection-specific implementations of the Create()
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The AutoResetEvent Class

The AutoResetEvent Class The AutoResetEvent class works in a similar way to the ManualResetEvent class. It waits for the timeout to take place or the event to be signaled and then notifies the waiting threads about the event. One importan
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Networking in .NET


Networking in .NET Prior to the advent of the .NET Framework, the ability to develop sophisticated Windows-based networking applications was limited to advanced C++ programmers using the convoluted WinSock library for the most part. There w
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End-to-End Examples


End-to-End Examples In this section of the chapter we will take a look at two larger examples. First, we'll take a look at creating thread-safe wrappers and then move on to a database connection pool. Writing Your Own Thread-Safe Wrappers
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Scalability in .NET

Scalability in .NET If you have a multiprocessor system, then you'll see threads really show their worth. The Windows OS manages the allocation of threads to processors and, as you have seen throughout this book, firing any process automati
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Programming the Thread Pool in C#


Programming the Thread Pool in C# The previous sections of the chapter dealt with theoretical aspects of using thread pools in the .NET Framework. Now it's time for us to cover the programmatic aspects of creating and using thread pools in
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The ObjectPool Class

The ObjectPool Class Let's start our discussion of the ObjectPool class by listing it in its entirety:    using System;   using System.Collections;   using System.Timers;   namespace WroxCS          internal ObjectPool()              pro
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Threading Traps

Threading Traps We've seen the two main situations where it can be a good idea to use threading in your applications. However, there are some circumstances in which spawning a new thread would be a bad idea. Obviously, this isn't going to be a
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The Enter() and Exit() Methods


The Enter() and Exit() Methods It is important to note that the Monitor methods are static and can be called on the Monitor class itself rather than an instance of that class. In the .NET Framework, each object has a lock associated with
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What is Thread Pooling

What is Thread Pooling? Thread pooling is the process of creating a collection of threads during the initialization of a multithreaded application, and then reusing those threads for new tasks as and when required, instead of creating new threa
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Threading in .NET


Threading in .NET Overview In Chapter 1 we described what threading is. We covered a lot of the common ground that many may be familiar with already. Knowing the what portion of threading is important. In this chapter, you will see how t
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The lock Statement

The lock Statement The lock keyword can be used as an alternative to the methods of the Monitor class. The following two blocks of code are equivalent:    Monitor.Enter(x)        Monitor.Exit(x)   lock(this)   The following exam
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Peer Thread Model


Peer Thread Model The next threading model we will describe is the Peer threading model. In this threading model, each thread will receive its own input from the appropriate sources and process that input accordingly. This model is illustr
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Main and Worker Thread Model


Main and Worker Thread Model This is the commonest model and the one used throughout this book so far. It is illustrated in Figure 3: Figure 3 In the Main and Worker thread model, the main thread receives all input and passes it
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Multiple Threads in Applications - STA Threading Model


Multiple Threads in Applications If you programmed in versions of VB prior to .NET, you might know that VB supported multiple threads within a COM container, such as MTS or COM+. Well, although multiple threads were supported by VB5/6, the
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The BooleanSwitch Class

The BooleanSwitch Class Using this class in the traced code, you can decide to activate/deactivate messages by simply changing a value in the application configuration file. The WriteLineIf() and WriteIf() methods will be useful to write me
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The TextWriterTraceListener Class

The TextWriterTraceListener Class We are going to conclude our listener explanation by examining the TextWriterTraceListener class. It is useful when you have to write our tracing messages to a text file or directly in a console application
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The ThreadStaticAttribute Class

The ThreadStaticAttribute Class ThreadStaticAttribute is used on a static variable to create a separate variable for each thread executing it, rather than sharing (default behavior) the static variable across threads. This means that a sta
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Why Worry About Synchronization


Why Worry About Synchronization? There are two main reasons why any .NET developer needs to keep synchronization in mind when designing a multithreaded application: § To avoid race conditions § To ensure threadsafety Since the .NET
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Exploring the ThreadPool Class

Exploring the ThreadPool Class In this section, we will be exploring the various aspects of the ThreadPool class and will see how they can be employed to create thread pools in our .NET applications. The ThreadPool class provides a pool of
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