C# NeoDatis.GetBaseIdentifier方法代码示例

		private NeoDatis.Odb.Core.Server.Layers.Layer3.Engine.Message ManageGetObjectFromIdCommand
			(NeoDatis.Odb.Core.Server.Message.GetObjectFromIdMessage message)
		{
			// Gets the base identifier
			string baseIdentifier = message.GetBaseIdentifier();
			// Gets the connection manager for this base identifier
			NeoDatis.Odb.Core.Server.Connection.ConnectionManager connectionManager = null;
			NeoDatis.Odb.Core.Server.Connection.IConnection connection = null;
			NeoDatis.Odb.OID oid = null;
			NeoDatis.Tool.Mutex.Mutex mutex = null;
			try
			{
				mutex = NeoDatis.Tool.Mutex.MutexFactory.Get(baseIdentifier).Acquire("getObjectFromId"
					);
				// Gets the connection manager for this base identifier
				connectionManager = GetConnectionManager(baseIdentifier);
				if (connectionManager == null)
				{
					System.Text.StringBuilder buffer = new System.Text.StringBuilder();
					buffer.Append("ODBServer.ConnectionThread:Base ").Append(baseIdentifier).Append(" is not registered on this server!"
						);
					return new NeoDatis.Odb.Core.Server.Message.GetObjectFromIdMessageResponse(baseIdentifier
						, message.GetConnectionId(), buffer.ToString());
				}
				connection = connectionManager.GetConnection(message.GetConnectionId());
				connection.SetCurrentAction(NeoDatis.Odb.Core.Server.Connection.ConnectionAction.
					ActionSelect);
				NeoDatis.Odb.Core.Layers.Layer3.IStorageEngine engine = connection.GetStorageEngine
					();
				oid = message.GetOid();
				NeoDatis.Odb.Core.Layers.Layer2.Meta.NonNativeObjectInfo nnoi = engine.GetMetaObjectFromOid
					(oid);
				return new NeoDatis.Odb.Core.Server.Message.GetObjectFromIdMessageResponse(baseIdentifier
					, message.GetConnectionId(), nnoi);
			}
			catch (System.Exception e)
			{
				string se = NeoDatis.Tool.Wrappers.OdbString.ExceptionToString(e, false);
				string msg = baseIdentifier + ":Error while getting object of id " + oid;
				NeoDatis.Tool.DLogger.Error(msg, e);
				return new NeoDatis.Odb.Core.Server.Message.GetObjectFromIdMessageResponse(baseIdentifier
					, message.GetConnectionId(), msg + ":\n" + se);
			}
			finally
			{
				if (mutex != null)
				{
					mutex.Release("getObjectFromId");
				}
				connection.EndCurrentAction();
			}
		}

		/// <summary>manage the store command.</summary>
		/// <remarks>
		/// manage the store command. The store command can be an insert(oid==null)
		/// or an update(oid!=null)
		/// If insert get the base mutex IF update, first get the mutex of the oid to
		/// update then get the base mutex, to avoid dead lock in case of concurrent
		/// update.
		/// </remarks>
		/// <param name="message"></param>
		/// <returns></returns>
		private NeoDatis.Odb.Core.Server.Layers.Layer3.Engine.Message ManageStoreCommand(
			NeoDatis.Odb.Core.Server.Message.StoreMessage message)
		{
			// Gets the base identifier
			string baseIdentifier = message.GetBaseIdentifier();
			NeoDatis.Odb.Core.Server.Connection.ConnectionManager connectionManager = null;
			NeoDatis.Odb.Core.Server.Connection.IConnection connection = null;
			NeoDatis.Tool.Mutex.Mutex mutex = null;
			NeoDatis.Odb.OID oid = message.GetNnoi().GetOid();
			try
			{
				// Gets the connection manager for this base identifier
				connectionManager = GetConnectionManager(baseIdentifier);
				if (connectionManager == null)
				{
					System.Text.StringBuilder buffer = new System.Text.StringBuilder();
					buffer.Append("ODBServer.ConnectionThread:Base ").Append(baseIdentifier).Append(" is not registered on this server!"
						);
					return new NeoDatis.Odb.Core.Server.Message.StoreMessageResponse(baseIdentifier, 
						message.GetConnectionId(), buffer.ToString());
				}
				connection = connectionManager.GetConnection(message.GetConnectionId());
				NeoDatis.Odb.Impl.Core.Server.Transaction.ServerSession session = (NeoDatis.Odb.Impl.Core.Server.Transaction.ServerSession
					)sessionManager.GetSession(baseIdentifier, true);
				NeoDatis.Odb.Core.Layers.Layer3.IStorageEngine engine = connection.GetStorageEngine
					();
				session.SetClientIds(message.GetClientIds());
				bool objectIsNew = oid == NeoDatis.Odb.Impl.Core.Layers.Layer3.Engine.StorageEngineConstant
					.NullObjectId;
				if (objectIsNew)
				{
					connection.SetCurrentAction(NeoDatis.Odb.Core.Server.Connection.ConnectionAction.
						ActionInsert);
					mutex = NeoDatis.Tool.Mutex.MutexFactory.Get(baseIdentifier).Acquire("store");
					oid = engine.WriteObjectInfo(NeoDatis.Odb.Impl.Core.Layers.Layer3.Engine.StorageEngineConstant
						.NullObjectId, message.GetNnoi(), NeoDatis.Odb.Impl.Core.Layers.Layer3.Engine.StorageEngineConstant
						.PositionNotInitialized, false);
				}
				else
				{
					connection.SetCurrentAction(NeoDatis.Odb.Core.Server.Connection.ConnectionAction.
						ActionUpdate);
					// If object is not new, ODB is going to execute an Update.
					// Here we must lock the object with the oid to avoid a
					// concurrent update
					// This is done by creating a special mutex with the base
					// identifier and the oid.
					// This mutex will be kept in the connection and only released
					// when committing
					// or rollbacking the connection
					connection.LockObjectWithOid(oid);
					// If object lock is ok, then get the mutex of the database
					mutex = NeoDatis.Tool.Mutex.MutexFactory.Get(baseIdentifier).Acquire("store");
					// If oid is not -1, the object already exist, we must update
					oid = engine.UpdateObject(message.GetNnoi(), false);
				}
				return new NeoDatis.Odb.Core.Server.Message.StoreMessageResponse(baseIdentifier, 
					message.GetConnectionId(), oid, objectIsNew, message.GetClientIds(), session.GetServerIds
					());
			}
			catch (System.Exception e)
			{
				if (oid != null)
				{
					try
					{
						connection.UnlockObjectWithOid(message.GetNnoi().GetOid());
					}
					catch (System.Exception e1)
					{
						NeoDatis.Tool.DLogger.Error("Error while unlocking object with oid " + oid + " : "
							 + NeoDatis.Tool.Wrappers.OdbString.ExceptionToString(e1, true));
					}
				}
				string se = NeoDatis.Tool.Wrappers.OdbString.ExceptionToString(e, false);
				string msg = baseIdentifier + ":Error while storing object " + message.GetNnoi();
				NeoDatis.Tool.DLogger.Error(msg, e);
				return new NeoDatis.Odb.Core.Server.Message.StoreMessageResponse(baseIdentifier, 
					message.GetConnectionId(), msg + ":\n" + se);
			}
			finally
			{
				if (mutex != null)
				{
					mutex.Release("store");
				}
				connection.EndCurrentAction();
			}
		}

			 ManageCheckMetaModelCompatibilityCommand(NeoDatis.Odb.Core.Server.Message.CheckMetaModelCompatibilityMessage
			 message)
		{
			// Gets the base identifier
			string baseIdentifier = message.GetBaseIdentifier();
			// Gets the connection manager for this base identifier
			NeoDatis.Odb.Core.Server.Connection.ConnectionManager connectionManager = null;
			NeoDatis.Odb.Core.Server.Connection.IConnection connection = null;
			try
			{
				// Gets the connection manager for this base identifier
				connectionManager = GetConnectionManager(baseIdentifier);
				if (connectionManager == null)
				{
					System.Text.StringBuilder buffer = new System.Text.StringBuilder();
					buffer.Append("ODBServer.ConnectionThread:Base ").Append(baseIdentifier).Append(" is not registered on this server!"
						);
					return new NeoDatis.Odb.Core.Server.Message.CheckMetaModelCompatibilityMessageResponse
						(baseIdentifier, message.GetConnectionId(), buffer.ToString());
				}
				connection = connectionManager.GetConnection(message.GetConnectionId());
				NeoDatis.Odb.Impl.Core.Server.Transaction.ServerSession session = (NeoDatis.Odb.Impl.Core.Server.Transaction.ServerSession
					)sessionManager.GetSession(baseIdentifier, true);
				NeoDatis.Odb.Core.Layers.Layer3.IStorageEngine engine = connection.GetStorageEngine
					();
				System.Collections.Generic.IDictionary<string, NeoDatis.Odb.Core.Layers.Layer2.Meta.ClassInfo
					> currentCIs = message.GetCurrentCIs();
				NeoDatis.Odb.Core.Layers.Layer3.Engine.CheckMetaModelResult result = engine.CheckMetaModelCompatibility
					(currentCIs);
				NeoDatis.Odb.Core.Layers.Layer2.Meta.MetaModel updatedMetaModel = null;
				if (result.IsModelHasBeenUpdated())
				{
					updatedMetaModel = session.GetMetaModel().Duplicate();
				}
				// If meta model has been updated, returns it to clients
				return new NeoDatis.Odb.Core.Server.Message.CheckMetaModelCompatibilityMessageResponse
					(baseIdentifier, message.GetConnectionId(), result, updatedMetaModel);
			}
			catch (System.Exception e)
			{
				NeoDatis.Tool.DLogger.Error(baseIdentifier + ":Server error while closing", e);
				return new NeoDatis.Odb.Core.Server.Message.CheckMetaModelCompatibilityMessageResponse
					(baseIdentifier, message.GetConnectionId(), NeoDatis.Tool.Wrappers.OdbString.ExceptionToString
					(e, false));
			}
		}

		private NeoDatis.Odb.Core.Server.Layers.Layer3.Engine.Message ManageCountCommand(
			NeoDatis.Odb.Core.Server.Message.CountMessage message)
		{
			// Gets the base identifier
			string baseIdentifier = message.GetBaseIdentifier();
			// Gets the connection manager for this base identifier
			NeoDatis.Odb.Core.Server.Connection.ConnectionManager connectionManager = null;
			NeoDatis.Odb.Core.Server.Connection.IConnection connection = null;
			NeoDatis.Tool.Mutex.Mutex mutex = null;
			try
			{
				mutex = NeoDatis.Tool.Mutex.MutexFactory.Get(baseIdentifier).Acquire("count");
				// Gets the connection manager for this base identifier
				connectionManager = GetConnectionManager(baseIdentifier);
				if (connectionManager == null)
				{
					System.Text.StringBuilder buffer = new System.Text.StringBuilder();
					buffer.Append("ODBServer.ConnectionThread:Base ").Append(baseIdentifier).Append(" is not registered on this server!"
						);
					return new NeoDatis.Odb.Core.Server.Message.GetObjectFromIdMessageResponse(baseIdentifier
						, message.GetConnectionId(), buffer.ToString());
				}
				connection = connectionManager.GetConnection(message.GetConnectionId());
				NeoDatis.Odb.Core.Layers.Layer3.IStorageEngine engine = connection.GetStorageEngine
					();
				NeoDatis.Odb.Impl.Core.Query.Criteria.CriteriaQuery query = message.GetCriteriaQuery
					();
				long nbObjects = engine.Count(query);
				return new NeoDatis.Odb.Core.Server.Message.CountMessageResponse(baseIdentifier, 
					message.GetConnectionId(), nbObjects);
			}
			catch (System.Exception e)
			{
				string se = NeoDatis.Tool.Wrappers.OdbString.ExceptionToString(e, false);
				string msg = baseIdentifier + ":Error while counting objects for " + message.GetCriteriaQuery
					();
				NeoDatis.Tool.DLogger.Error(msg, e);
				return new NeoDatis.Odb.Core.Server.Message.CountMessageResponse(baseIdentifier, 
					message.GetConnectionId(), msg + ":\n" + se);
			}
			finally
			{
				if (mutex != null)
				{
					mutex.Release("count");
				}
			}
		}