mcs/class/System.Transactions/System.Transactions/TransactionScope.cs

   1 //
   2 // TransactionScope.cs
   3 //
   4 // Author:
   5 //      Atsushi Enomoto  <atsushi@ximian.com>
   6 //      Ankit Jain       <JAnkit@novell.com>
   7 //
   8 // (C)2005 Novell Inc,
   9 // (C)2006 Novell Inc,
  10 //
  11
  12 #if NET_2_0
  13
  14 using DTCOption = System.Transactions.EnterpriseServicesInteropOption;
  15
  16 namespace System.Transactions
  17 {
  18         public sealed class TransactionScope : IDisposable
  19         {
  20                 static TransactionOptions defaultOptions =
  21                         new TransactionOptions (0, TransactionManager.DefaultTimeout);
  22
  23                 Transaction transaction;
  24                 Transaction oldTransaction;
  25                 TransactionScope parentScope;
  26                 TimeSpan timeout;
  27
  28                 /* Num of non-disposed nested scopes */
  29                 int nested;
  30
  31                 bool disposed;
  32                 bool completed;
  33                 bool isRoot;
  34
  35                 public TransactionScope ()
  36                         : this (TransactionScopeOption.Required,
  37                                 TransactionManager.DefaultTimeout)
  38                 {
  39                 }
  40
  41                 public TransactionScope (Transaction transaction)
  42                         : this (transaction, TransactionManager.DefaultTimeout)
  43                 {
  44                 }
  45
  46                 public TransactionScope (Transaction transaction,
  47                         TimeSpan timeout)
  48                         : this (transaction, timeout, DTCOption.None)
  49                 {
  50                 }
  51
  52                 [MonoTODO ("EnterpriseServicesInteropOption not supported.")]
  53                 public TransactionScope (Transaction transaction,
  54                         TimeSpan timeout, DTCOption opt)
  55                 {
  56                         Initialize (TransactionScopeOption.Required,
  57                                 transaction, defaultOptions, opt, timeout);
  58                 }
  59
  60                 public TransactionScope (TransactionScopeOption option)
  61                         : this (option, TransactionManager.DefaultTimeout)
  62                 {
  63                 }
  64
  65                 [MonoTODO ("No TimeoutException is thrown")]
  66                 public TransactionScope (TransactionScopeOption option,
  67                         TimeSpan timeout)
  68                 {
  69                         Initialize (option, null, defaultOptions,
  70                                 DTCOption.None, timeout);
  71                 }
  72
  73                 public TransactionScope (TransactionScopeOption scopeOption,
  74                         TransactionOptions options)
  75                         : this (scopeOption, options, DTCOption.None)
  76                 {
  77                 }
  78
  79                 [MonoTODO ("EnterpriseServicesInteropOption not supported")]
  80                 public TransactionScope (TransactionScopeOption scopeOption,
  81                         TransactionOptions options,
  82                         DTCOption opt)
  83                 {
  84                         Initialize (scopeOption, null, options, opt,
  85                                 TransactionManager.DefaultTimeout);
  86                 }
  87
  88                 void Initialize (TransactionScopeOption scopeOption,
  89                         Transaction tx, TransactionOptions options,
  90                         DTCOption interop, TimeSpan timeout)
  91                 {
  92                         completed = false;
  93                         isRoot = false;
  94                         nested = 0;
  95                         this.timeout = timeout;
  96
  97                         oldTransaction = Transaction.CurrentInternal;
  98
  99                         Transaction.CurrentInternal = transaction = InitTransaction (tx, scopeOption);
 100                         if (transaction != null)
 101                                 transaction.InitScope (this);
 102                         if (parentScope != null)
 103                                 parentScope.nested ++;
 104                 }
 105
 106                 Transaction InitTransaction (Transaction tx, TransactionScopeOption scopeOption)
 107                 {
 108                         if (tx != null)
 109                                 return tx;
 110
 111                         if (scopeOption == TransactionScopeOption.Suppress) {
 112                                 if (Transaction.CurrentInternal != null)
 113                                         parentScope = Transaction.CurrentInternal.Scope;
 114                                 return null;
 115                         }
 116
 117                         if (scopeOption == TransactionScopeOption.Required) {
 118                                 if (Transaction.CurrentInternal == null) {
 119                                         isRoot = true;
 120                                         return new Transaction ();
 121                                 }
 122
 123                                 parentScope = Transaction.CurrentInternal.Scope;
 124                                 return Transaction.CurrentInternal;
 125                         }
 126
 127                         /* RequiresNew */
 128                         if (Transaction.CurrentInternal != null)
 129                                 parentScope = Transaction.CurrentInternal.Scope;
 130                         isRoot = true;
 131                         return new Transaction ();
 132                 }
 133
 134                 public void Complete ()
 135                 {
 136                         if (completed)
 137                                 throw new InvalidOperationException ("The current TransactionScope is already complete. You should dispose the TransactionScope.");
 138
 139                         completed = true;
 140                 }
 141
 142                 internal bool IsComplete {
 143                         get { return completed; }
 144                 }
 145
 146                 internal TimeSpan Timeout
 147                 {
 148                         get { return timeout; }
 149                 }
 150
 151                 public void Dispose ()
 152                 {
 153                         if (disposed)
 154                                 return;
 155
 156                         disposed = true;
 157
 158                         if (parentScope != null)
 159                                 parentScope.nested --;
 160
 161                         if (nested > 0) {
 162                                 transaction.Rollback ();
 163                                 throw new InvalidOperationException ("TransactionScope nested incorrectly");
 164                         }
 165
 166                         if (Transaction.CurrentInternal != transaction) {
 167                                 if (transaction != null)
 168                                         transaction.Rollback ();
 169                                 if (Transaction.CurrentInternal != null)
 170                                         Transaction.CurrentInternal.Rollback ();
 171
 172                                 throw new InvalidOperationException ("Transaction.Current has changed inside of the TransactionScope");
 173                         }
 174
 175                         if (Transaction.CurrentInternal == oldTransaction && oldTransaction != null)
 176                                 oldTransaction.Scope = parentScope;
 177
 178                         Transaction.CurrentInternal = oldTransaction;
 179
 180                         if (transaction == null)
 181                                 /* scope was not in a transaction, (Suppress) */
 182                                 return;
 183
 184                         transaction.Scope = null;
 185
 186                         if (!IsComplete) {
 187                                 transaction.Rollback ();
 188                                 return;
 189                         }
 190
 191                         if (!isRoot)
 192                                 /* Non-root scope has completed+ended */
 193                                 return;
 194
 195                         transaction.CommitInternal ();
 196                 }
 197
 198
 199         }
 200 }
 201
 202 #endif