방법: CRM(리소스 보상 관리자) 만들기
코드 예제
COM+로 제공되는 CRM(리소스 보상 관리자)을 사용하면 Microsoft DTC(Distributed Transaction Coordinator) 트랜잭션에 비트랜잭션 개체를 포함할 수 있습니다. CRM이 완전한 리소스 관리자 기능을 제공하지는 않지만 전체 과정이 완료되지 않으면 아무 작업도 수행되지 않는 트랜잭션 원자성 및 복구 로그를 통한 영속성을 제공합니다.
리소스 보상 관리자를 만들려면
EnterpriseServices 및 CompensatingResourceManager 네임스페이스를 가져옵니다.
Imports System.EnterpriseServices Imports System.EnterpriseServices.CompensatingResourceManager
using System.EnterpriseServices; using System.EnterpriseServices.CompensatingResourceManager;
어셈블리에 대해 CRM 지원을 사용합니다.
<assembly: ApplicationCrmEnabled>
[assembly: ApplicationCrmEnabled]
ServicedComponent 클래스에서 파생되는 CRM Worker 클래스를 정의합니다. 예를 들어, 다음 코드에서는 ServicedComponent에서 직접 파생되는
CRMWorker
클래스를 보여 줍니다.<Transaction> Public Class CRMWorker Inherits Servicedcomponent End Class
[Transaction] public class CRMWorker:ServicedComponent { }
Clerk 개체를 만들고 트랜잭션을 커밋하거나 중단하는 public 메서드를 구현합니다. 이 메서드는 Clerk 개체를 사용하여 CRM 로그를 업데이트해야 합니다. 예를 들어, 다음 코드에서는 CRM 로그를 업데이트하고 트랜잭션을 커밋하거나 중단하는
CRMMethod
메서드를 보여 줍니다.Public Sub CRMMethod(filename As String, bCommit As Boolean) ' Create the clerk object. Dim myclerk As Clerk=New Clerk(GetType(CRMCompensator), _ "CRMCompensator", CompensatorOptions.AllPhases) myclerk.WriteLogRecord(filename) myclerk.ForceLog() If bCommit=true Then ContextUtil.SetComplete() Else ContextUtil.SetAbort() End If End Sub
public void CRMMethod(string fileName, bool bCommit) { // Create clerk object. Clerk clerk = new Clerk(typeof(CRMCompensator), "CRMCompensator", CompensatorOptions.AllPhases); clerk.WriteLogRecord(fileName); clerk.ForceLog(); if (bCommit) ContextUtil.SetComplete(); else ContextUtil.SetAbort(); }
Compensation 클래스에서 파생되는 클래스를 정의합니다.
JustInTimeActivation() Public Class CRMCompensator Inherits Compensator End Class
[JustInTimeActivation] public class CRMCompensator:Compensator { }
참고: |
---|
Compensator에 |
Compensator 클래스의
BeginPrepare
,PrepareRecord
,EndPrepare
,BeginCommit
,CommitRecord
,EndCommit
,BeginAbort
,AbortRecord
및EndAbort
멤버를 재정의합니다.CRM Worker 및 Compensator 구성 요소를 테스트하는 클라이언트 응용 프로그램을 만듭니다.
System.EnterpriseServices와 같은 필요한 이름과 CRM Worker 및 Compensator 클래스를 구현하는 네임스페이스를 가져옵니다.
Imports System Imports System.IO Imports System.EnterpriseServices Imports CrmServer Imports System.Runtime.InteropServices
using System; using System.IO; using System.EnterpriseServices; using CrmServer; using System.Runtime.InteropServices;
클래스를 정의하고 Main 메서드를 구현하여 CRM Worker 클래스의 인스턴스를 만든 다음 CRM Clerk 개체를 만드는 해당 메서드를 호출합니다. 예를 들어, 다음 코드에서는
CRMWorker
형식의 개체를 만들고CRMMethod
메서드를 호출하여 CRM Clerk 개체를 만듭니다.Public Class CRM Public Shared Sub Main() dim logfilename As String = "crm.log" Console.WriteLine("Creating a managed CRM worker"+ _ "object...") dim crmworker As CRMWorker = new CRMWorker() Console.WriteLine("Demonstrating a worker commit...") crmworker.CRMMethod(logfilename, True) Console.WriteLine("Demonstrating a worker abort...") crmworker.CRMMethod(logfilename, False) Console.WriteLine("DONE!") End Sub End Class
class CRM { public static int Main() { string logfilename = "crm.log"; Console.WriteLine("Creating a managed CRM worker object..."); CRMWorker crmworker = new CRMWorker(); Console.WriteLine("Demonstrating a worker commit..."); crmworker.CRMMethod(logfilename, true); Console.WriteLine("Demonstrating a worker abort..."); crmworker.CRMMethod(logfilename, false); Console.WriteLine("DONE!"); return 0; } }
강력한 키를 생성하고 다음 예제를 컴파일합니다.
sn –k crm.key vbc /t:library /r:System.EnterpriseServices.dll crm.vb vbc /r:crm.dll /r:System.EnterpriseServices.dll crmclient.vb
sn –k crm.key csc /t:library /r:System.EnterpriseServices.dll crm.cs csc /r:crm.dll crmclient.cs
예제
Imports System
Imports System.IO
Imports System.Reflection
Imports System.EnterpriseServices
Imports System.EnterpriseServices.CompensatingResourceManager
<assembly: ApplicationActivation(ActivationOption.Server)>
<assembly: ApplicationCrmEnabled>
<assembly: AssemblyKeyFile("crm.key")>
Namespace CrmServer
' Create a Worker class.
<Transaction> Public Class CRMWorker
Inherits Servicedcomponent
Public Sub CRMMethod(filename As String, bCommit As Boolean)
' Create the clerk object.
Dim myclerk As Clerk=New Clerk(GetType(CRMCompensator), _
"CRMCompensator", CompensatorOptions.AllPhases)
myclerk.WriteLogRecord(filename)
myclerk.ForceLog()
If bCommit=true Then
ContextUtil.SetComplete()
Else
ContextUtil.SetAbort()
End If
End Sub
End Class
' Create a class derived from the Compensator class.
JustInTimeActivation()
Public Class CRMCompensator
Inherits Compensator
Dim bBeginPrepareCalled As Boolean = False
Dim bPrepareRecordCalled As Boolean = False
Dim bBeginCommitCalled As Boolean = False
Dim bCommitRecordCalled As Boolean = False
Dim bBeginAbortCalled As Boolean = False
Dim bAbortRecordCalled As Boolean = False
Dim _filename as String
Public Overrides Sub BeginPrepare()
bBeginPrepareCalled = True
End Sub
Public Overrides Function PrepareRecord(rec As LogRecord) _
As Boolean
dim o as Object = rec.Record
_fileName = o.ToString()
bPrepareRecordCalled = True
Return False
End Function
Public Overrides Function EndPrepare() As Boolean
if not bBeginPrepareCalled then Return False
if not bPrepareRecordCalled then Return False
if _fileName="" then Return False
' This is a Prepare Phase success.
Return True
End Function
Public Overrides Sub BeginCommit(fRecovery As Boolean)
bBeginCommitCalled = True
End Sub
Public Overrides Function CommitRecord(rec As LogRecord) _
As Boolean
bCommitRecordCalled = True
Return True
End Function
Public Overrides Sub EndCommit()
if not bBeginCommitCalled then Return
if not bCommitRecordCalled then Return
if _fileName="" then Return
' This is a Commit Phase success.
End Sub
Public Overrides Sub BeginAbort(fRecovery As Boolean)
bBeginAbortCalled = True
End Sub
Public Overrides Function AbortRecord(rec As LogRecord) _
As Boolean
bAbortRecordCalled = True
dim o as Object = rec.Record
_fileName = o.ToString()
Return True
End Function
Public Overrides Sub EndAbort()
if not bBeginAbortCalled then Return
if not bAbortRecordCalled then Return
if _fileName="" then Return
' This is an Abort Phase success.
End Sub
End Class
End Namespace
using System;
using System.IO;
using System.Reflection;
using System.EnterpriseServices;
using System.EnterpriseServices.CompensatingResourceManager;
[assembly: ApplicationActivation(ActivationOption.Server)]
[assembly: ApplicationCrmEnabled]
[assembly: AssemblyKeyFile("crm.key")]
namespace CrmServer
{
[Transaction]
// Create a Worker class.
public class CRMWorker:ServicedComponent
{
public void CRMMethod(string fileName, bool bCommit)
{
// Create clerk object.
Clerk clerk = new Clerk(typeof(CRMCompensator),
"CRMCompensator", CompensatorOptions.AllPhases);
clerk.WriteLogRecord(fileName);
clerk.ForceLog();
if (bCommit)
ContextUtil.SetComplete();
else
ContextUtil.SetAbort();
}
}
// Create class derived from Compensator class.
[JustInTimeActivation]
public class CRMCompensator:Compensator
{
bool bBeginPrepareCalled = false;
bool bPrepareRecordCalled = false;
bool bBeginCommitCalled = false;
bool bCommitRecordCalled = false;
bool bBeginAbortCalled = false;
bool bAbortRecordCalled = false;
String _fileName;
public override void BeginPrepare()
{
bBeginPrepareCalled = true;
}
public override bool PrepareRecord(LogRecord rec)
{
Object o = rec.Record;
_fileName = o.ToString();
bPrepareRecordCalled = true;
return false;
}
public override bool EndPrepare()
{
if (!bBeginPrepareCalled)
{return false;}
if (!bPrepareRecordCalled)
{return false;}
if (_fileName==null)
{return false;}
// This is a Prepare Phase success.
return true;
}
public override void BeginCommit(bool fRecovery)
{
bBeginCommitCalled = true;
}
public override bool CommitRecord(LogRecord rec)
{
bCommitRecordCalled = true;
return true;
}
public override void EndCommit()
{
if (!bBeginCommitCalled)
{return;}
if (!bCommitRecordCalled)
{return;}
if (_fileName==null)
{return;}
// This is a Commit Phase success.
}
public override void BeginAbort(bool fRecovery)
{
bBeginAbortCalled = true;
}
public override bool AbortRecord(LogRecord rec)
{
bAbortRecordCalled = true;
Object o = rec.Record;
_fileName = o.ToString();
return true;
}
public override void EndAbort()
{
if (!bBeginAbortCalled)
{return;}
if (!bAbortRecordCalled)
{return;}
if (_fileName==null)
{return;}
// This is an Abort Phase success.
}
}
}
참고 항목
참조
System.EnterpriseServices Namespace
개념
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