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c# barcode generator library open source v is Option[Int], so we get its value or default to 0 if v is None. in Font
10. v is Option[Int], so we get its value or default to 0 if v is None. Draw DataMatrix In None Using Barcode generator for Font Control to generate, create Data Matrix 2d barcode image in Font applications. www.OnBarcode.comPDF 417 Creator In None Using Barcode printer for Font Control to generate, create PDF417 image in Font applications. www.OnBarcode.comCHAPTER 6 ACTORS AND CONCURRENCY
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GS1 - 13 Encoder In Objective-C Using Barcode creator for iPad Control to generate, create UPC - 13 image in iPad applications. www.OnBarcode.comPainting Code 39 In None Using Barcode creator for Software Control to generate, create Code 39 image in Software applications. www.OnBarcode.comdef transfer2(src: Actor, sact: String, dest: Actor, dact: String, amount: Int): Boolean = { xid += 1 src ! BeginXAction(xid) dest ! BeginXAction(xid) (src ! (500, (xid, GetInfo)), dest ! (500, (xid, GetInfo))) match { case (Some(Info(sbal)), Some(Info(dbal))) => dest ! (xid, Update(dact, v => (v getOrElse 0) + amount)) if (sbal.getOrElse(sact, 0) > amount) { src ! (xid, Update(sact, v => (v getOrElse 0) - amount)) src ! (xid, CommitXAction) dest ! (xid, CommitXAction) true } else { src ! (xid, RollbackXAction) dest ! (xid, RollbackXAction) false } case _ => src ! (xid, RollbackXAction) dest ! (xid, RollbackXAction) false } } transfer2(dpp, "Checking", archer, "Checking", 700) println("XFer 700 dpp -> archer:") println("dpp: "+(dpp ! GetInfo)) println("archer: "+(archer ! GetInfo)) transfer2(dpp, "Checking", archer, "Checking", 700) println("Again, XFer 700 dpp -> archer:") println("dpp: "+(dpp ! GetInfo)) println("archer: "+(archer ! GetInfo)) transfer2(dpp, "Checking", archer, "Checking", 10) println("XFer 10 dpp -> archer:") println("dpp: "+(dpp ! GetInfo)) println("archer: "+(archer ! GetInfo)) } } Barcode Recognizer In VS .NET Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications. www.OnBarcode.comCreating PDF-417 2d Barcode In Visual C#.NET Using Barcode generation for .NET Control to generate, create PDF-417 2d barcode image in .NET framework applications. www.OnBarcode.comCHAPTER 6 ACTORS AND CONCURRENCY
Barcode Scanner In Java Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications. www.OnBarcode.comData Matrix Generator In Objective-C Using Barcode generator for iPad Control to generate, create Data Matrix ECC200 image in iPad applications. www.OnBarcode.comLet s step through the code. First some imports: GS1 - 13 Creation In Visual Studio .NET Using Barcode creator for .NET Control to generate, create GS1 - 13 image in Visual Studio .NET applications. www.OnBarcode.comUSS Code 128 Printer In .NET Framework Using Barcode generator for Visual Studio .NET Control to generate, create Code 128 image in Visual Studio .NET applications. www.OnBarcode.comimport scala.actors.Actor import Actor._ import scala.actors.TIMEOUT
PDF 417 Printer In .NET Framework Using Barcode printer for .NET framework Control to generate, create PDF 417 image in VS .NET applications. www.OnBarcode.comCode128 Scanner In C# Using Barcode recognizer for .NET Control to read, scan read, scan image in VS .NET applications. www.OnBarcode.comThe TIMEOUT message will be useful for staying in the transaction boundary for a certain period of time. Next, let s define some messages: case case case case case case case object GetInfo class Info(i: Map[String, Int]) class SetInfo(n: String, v: Int) class Update(n: String, f: Option[Int] => Int) class BeginXAction(id: Int) object CommitXAction object RollbackXAction The XAction messages allow us to define the transactional boundaries. Next, let s define an Acct, account, Actor: class Acct extends Actor { private var info: Map[String, Int] = Map() private var service = (normal, false) The service variable defines how we re going to service incoming requests. By default, requests will be handled with the normal handler, but if we re in a transaction, the handler can be changed. Next, let s define the normal handler: private def normal: PartialFunction[Any, Unit] = { case GetInfo => reply(Info(info)) case SetInfo(n, v) => info += n -> v case Update(n, f) => info += n -> f(info.get(n)) case BeginXAction(id) => begin(id) }
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