Services/Transaction/Castle.Services.Transaction/StandardTransaction.cs

   1 // Copyright 2004-2007 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.Services.Transaction
  16 {
  17         using System.Collections;
  18
  19         /// <summary>
  20         /// Implements a transaction root.
  21         /// </summary>
  22         public class StandardTransaction : AbstractTransaction
  23         {
  24                 private readonly TransactionDelegate onTransactionCommitted;
  25                 private readonly TransactionDelegate onTransactionRolledback;
  26
  27                 private IList children = ArrayList.Synchronized( new ArrayList() );
  28                 private bool rollbackOnly;
  29
  30                 protected StandardTransaction()
  31                 {
  32                 }
  33
  34                 public StandardTransaction(TransactionDelegate onTransactionCommitted, TransactionDelegate onTransactionRolledback,
  35                         TransactionMode transactionMode, IsolationMode isolationMode, bool distributedTransaction) :
  36                         this(transactionMode, isolationMode, distributedTransaction)
  37                 {
  38                         this.onTransactionCommitted = onTransactionCommitted;
  39                         this.onTransactionRolledback = onTransactionRolledback;
  40                 }
  41
  42                 public StandardTransaction(TransactionMode transactionMode, IsolationMode isolationMode, bool distributedTransaction) :
  43                         base(transactionMode, isolationMode, distributedTransaction)
  44                 {
  45                 }
  46
  47                 public StandardTransaction CreateChildTransaction()
  48                 {
  49                         ChildTransaction child = new ChildTransaction(this);
  50
  51                         children.Add(child);
  52
  53                         return child;
  54                 }
  55
  56                 public override bool IsChildTransaction
  57                 {
  58                         get { return false; }
  59                 }
  60
  61                 public override void Commit()
  62                 {
  63                         if (rollbackOnly)
  64                         {
  65                                 throw new TransactionException("Can't commit as transaction was marked as 'rollback only'");
  66                         }
  67
  68                         base.Commit();
  69
  70                         if (onTransactionCommitted != null) onTransactionCommitted(this);
  71                 }
  72
  73                 public override void Rollback()
  74                 {
  75                         base.Rollback();
  76
  77                         if (onTransactionRolledback != null) onTransactionRolledback(this);
  78                 }
  79
  80                 public override void SetRollbackOnly()
  81                 {
  82                         rollbackOnly = true;
  83                 }
  84
  85                 public override bool IsRollbackOnlySet
  86                 {
  87                         get { return rollbackOnly; }
  88                 }
  89         }
  90
  91         /// <summary>
  92         /// Emulates a standalone transaction but in fact it
  93         /// just propages a transaction.
  94         /// </summary>
  95         public class ChildTransaction : StandardTransaction
  96         {
  97                 private StandardTransaction _parent;
  98
  99                 public ChildTransaction(StandardTransaction parent) :
 100                         base(parent.TransactionMode, parent.IsolationMode, parent.DistributedTransaction)
 101                 {
 102                         _parent = parent;
 103                 }
 104
 105                 public override void Enlist(IResource resource)
 106                 {
 107                         _parent.Enlist(resource);
 108                 }
 109
 110                 public override void Begin()
 111                 {
 112                         // Ignored
 113                 }
 114
 115                 public override void Rollback()
 116                 {
 117                         // Vote as rollback
 118
 119                         _parent.SetRollbackOnly();
 120                 }
 121
 122                 public override void Commit()
 123                 {
 124                         // Vote as commit
 125                 }
 126
 127                 public override void SetRollbackOnly()
 128                 {
 129                         Rollback();
 130                 }
 131
 132                 public override void RegisterSynchronization(ISynchronization synchronization)
 133                 {
 134                         _parent.RegisterSynchronization(synchronization);
 135                 }
 136
 137                 public override IDictionary Context
 138                 {
 139                         get { return _parent.Context; }
 140                 }
 141
 142                 public override bool IsChildTransaction
 143                 {
 144                         get { return true; }
 145                 }
 146
 147                 public override bool IsRollbackOnlySet
 148                 {
 149                         get { return _parent.IsRollbackOnlySet; }
 150                 }
 151         }
 152 }