使用castle的自动事务控制

pignut_wang

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SQL Apache XML thread

直接使用castle的事务控制需要如下几步

1. 配置文件中要求isTransactional="true" 属性,如

xml 代码

<component id="Test" service="wygl.service.test.ITest, wygl.service"
type="wygl.service.test.TestImpl, wygl.service" lifestyle="Singleton"
isTransactional="true" />

2. 必须在容器中注册TransactionFacility ,配置文件片段如下

xml 代码

<facility id="transaction"
type="Castle.Facilities.AutomaticTransactionManagement.TransactionFacility,
Castle.Facilities.AutomaticTransactionManagement">facility>

3. 必须在容其中注册一个实现 Castle.Services.Transaction.ITransactionManager 接口的组件,下面时castle源码中的一个实现

c# 代码

// Copyright 2004-2006 Castle Project - http://www.castleproject.org/
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
namespace Castle.Services.Transaction
{
using System;
using System.Collections;
using System.ComponentModel;
using Castle.Core.Logging;
/// <summary></summary>
/// TODO: Ensure this class is thread-safe
///
public class DefaultTransactionManager : MarshalByRefObject, ITransactionManager
{
private static readonly object TransactionCreatedEvent = new object();
private static readonly object ChildTransactionCreatedEvent = new object();
private static readonly object TransactionCommittedEvent = new object();
private static readonly object TransactionRolledbackEvent = new object();
private static readonly object TransactionDisposedEvent = new object();
private EventHandlerList events = new EventHandlerList();
private ILogger logger = new NullLogger();
private Stack transactions = new Stack(5);
public DefaultTransactionManager()
{
}
public ILogger Logger
{
get { return logger; }
set { logger = value; }
}
#region MarshalByRefObject
public override object InitializeLifetimeService()
{
return null;
}
#endregion
#region ITransactionManager Members
public virtual ITransaction CreateTransaction(TransactionMode transactionMode, IsolationMode isolationMode)
{
if (transactionMode == TransactionMode.Unspecified)
{
transactionMode = ObtainDefaultTransactionMode(transactionMode);
}
CheckNotSupportedTransaction(transactionMode);
if (CurrentTransaction == null &&
(transactionMode == TransactionMode.Supported ||
transactionMode == TransactionMode.NotSupported))
{
return null;
}
StandardTransaction transaction = null;
if (CurrentTransaction != null)
{
if (transactionMode == TransactionMode.Requires || transactionMode == TransactionMode.Supported)
{
transaction = (CurrentTransaction as StandardTransaction).CreateChildTransaction();
RaiseChildTransactionCreated(transaction, transactionMode, isolationMode);
logger.Debug("Child Transaction {0} created", transaction.GetHashCode());
}
}
if (transaction == null)
{
transaction = new StandardTransaction(
new TransactionDelegate(RaiseTransactionCommitted),
new TransactionDelegate(RaiseTransactionRolledback) );
RaiseTransactionCreated(transaction, transactionMode, isolationMode);
logger.Debug("Transaction {0} created", transaction.GetHashCode());
}
transaction.Logger = logger.CreateChildLogger( transaction.GetType().FullName );
transactions.Push(transaction);
return transaction;
}
public event TransactionCreationInfoDelegate TransactionCreated
{
add { events.AddHandler(TransactionCreatedEvent, value); }
remove { events.RemoveHandler(TransactionCreatedEvent, value); }
}
public event TransactionCreationInfoDelegate ChildTransactionCreated
{
add { events.AddHandler(ChildTransactionCreatedEvent, value); }
remove { events.RemoveHandler(ChildTransactionCreatedEvent, value); }
}
public event TransactionDelegate TransactionCommitted
{
add { events.AddHandler(TransactionCommittedEvent, value); }
remove { events.RemoveHandler(TransactionCommittedEvent, value); }
}
public event TransactionDelegate TransactionRolledback
{
add { events.AddHandler(TransactionRolledbackEvent, value); }
remove { events.RemoveHandler(TransactionRolledbackEvent, value); }
}
public event TransactionDelegate TransactionDisposed
{
add { events.AddHandler(TransactionDisposedEvent, value); }
remove { events.RemoveHandler(TransactionDisposedEvent, value); }
}
public virtual ITransaction CurrentTransaction
{
get
{
if (transactions.Count == 0)
{
return null;
}
return transactions.Peek() as ITransaction;
}
}
public virtual void Dispose(ITransaction transaction)
{
if (transaction == null)
{
throw new ArgumentNullException("transaction", "Tried to dispose a null transaction");
}
lock(transactions)
{
if (CurrentTransaction != transaction)
{
throw new ArgumentException("transaction", "Tried to dispose a transaction that is not on the current active transaction");
}
transactions.Pop();
}
if (transaction is IDisposable)
{
(transaction as IDisposable).Dispose();
}
RaiseTransactionDisposed(transaction);
logger.Debug("Transaction {0} disposed successfully", transaction.GetHashCode());
}
#endregion
protected void RaiseTransactionCreated(ITransaction transaction, TransactionMode transactionMode, IsolationMode isolationMode)
{
TransactionCreationInfoDelegate eventDelegate = (TransactionCreationInfoDelegate) events[TransactionCreatedEvent];
if (eventDelegate != null)
{
eventDelegate(transaction, transactionMode, isolationMode);
}
}
protected void RaiseChildTransactionCreated(ITransaction transaction, TransactionMode transactionMode, IsolationMode isolationMode)
{
TransactionCreationInfoDelegate eventDelegate = (TransactionCreationInfoDelegate) events[ChildTransactionCreatedEvent];
if (eventDelegate != null)
{
eventDelegate(transaction, transactionMode, isolationMode);
}
}
protected void RaiseTransactionDisposed(ITransaction transaction)
{
TransactionDelegate eventDelegate = (TransactionDelegate) events[TransactionDisposedEvent];
if (eventDelegate != null)
{
eventDelegate(transaction);
}
}
protected void RaiseTransactionCommitted(ITransaction transaction)
{
TransactionDelegate eventDelegate = (TransactionDelegate) events[TransactionCommittedEvent];
if (eventDelegate != null)
{
eventDelegate(transaction);
}
}
protected void RaiseTransactionRolledback(ITransaction transaction)
{
TransactionDelegate eventDelegate = (TransactionDelegate) events[TransactionRolledbackEvent];
if (eventDelegate != null)
{
eventDelegate(transaction);
}
}
protected virtual TransactionMode ObtainDefaultTransactionMode(TransactionMode transactionMode)
{
return TransactionMode.Requires;
}
private void CheckNotSupportedTransaction(TransactionMode transactionMode)
{
if (transactionMode == TransactionMode.NotSupported &&
CurrentTransaction != null &&
CurrentTransaction.Status == TransactionStatus.Active)
{
String message = "There is a transaction active and the transaction mode " +
"specified explicit says that no transaction is supported for this context";
logger.Error(message);
throw new TransactionException(message);
}
}
}
}

4. 需要使用事务控制的类增加属性,例子如下

c# 代码

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using wygl.db;
using wygl.util;
using wygl.util.Transaction;
namespace wygl.service.test
{
[Castle.Services.Transaction.Transactional]
public class TestImpl : ITest
{
#region ITest 成员
[Castle.Services.Transaction.Transaction(Castle.Services.Transaction.TransactionMode.Requires)]
public virtual string execute()
{
string conString = configs.connString;
string SQL = "insert into test(name) values ('test') ";
int count = wygl.db.OleDbHelper.ExecuteNonQuery(conString,CommandType.Text, SQL);
SQL = "insert into test1(name) values ('test') ";
count = wygl.db.OleDbHelper.ExecuteNonQuery(conString, CommandType.Text, SQL);
return "ok:" + count.ToString();
}
#endregion
}
}

感谢 thh 的提醒,以后写东西一定注意,免得误导了大家就不好了,呵呵

上面的内容忘记写一个核心内容，就是 Castle.Facilities.NHibernateIntegration。如果没有使用Castle.Facilities.NHibernateIntegration.Internal.OpenSession(string alias)中的this.EnlistIfNecessary,那么StandardTransaction里的IResource List 是空的，就不会有任何的事务控制产生。

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经典blog收藏 | 利用castle 动态代理实现自动事务控制

2007-05-17 13:33
浏览 6134
评论(5)
查看更多

5 楼 thh 2007-09-04

4 楼 honey0371 2007-08-25

你好我写了一个测试自动事务控制得例子,专门用来测试castle自动事务的,思路是把2条记录插入不同的表中,故意设置第2个插入语句的插入字段的个数错误,就是说表中要插入2个数据,我故意插入一个,运行结果设想是应该是根据自动事务的原理第一个记录也插不进去,但是第一个插入语句竟然可以把数据插入进去,我实在不知道是哪里错误了,请!
[Transaction(TransactionMode.Requires)]
        public void insert()
        {

            try
            {
                string[] strs ={ "insert into yytest1 values('1511','tt')", "insert into yytest values( 'tyut')" };
                Base newbase = new Base();
                newbase.ExecuteSqls2(strs);

            }
            catch (Exception ex)
            {
            //    throw new Exception(ex.Message);

          Console.Write(ex.Message);

            }

        }

3 楼 pignut_wang 2007-06-13

建议参考一下,我的另外一篇文章
利用castle 动态代理实现自动事务控制
中的源码

2 楼 pignut_wang 2007-06-13

应该是你的拦截器没有实现
实现这个拦截器,然后增加到组件注册中,应该就可以了

1 楼 chwang 2007-06-12

请问一下 “Castle.Facilities.AutomaticTransactionManagement.TransactionComponentInspector”的方法“ProcessModel”没有实现怎么会出现这个异常呢?

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