/// <summary>
/// Execute a service from a client
/// </summary>
/// <param name="customerId"></param>
/// <param name="userId"></param>
/// <param name="profile"></param>
/// <param name="area"></param>
/// <param name="moduleId"></param>
/// <param name="service"></param>
/// <param name="record"></param>
/// <param name="identity"></param>
/// <returns>Data</returns>
public JObject ExecuteService(int customerId, int userId, UserProfile.EUserProfile profile, string area, int moduleId, string service, JObject record, JObject identity)
{
JObject result = null;
Info($"Executing the service: ['{service}', '{(record == null ? "null" : record.ToString(Formatting.None))}', '{(identity == null ? "null" : identity.ToString(Formatting.None))}'] ...");
// Lock database during the execution of the service
using (DatabaseLock lockDatabase = Database.Lock(customerId))
{
// Execute the request
try
{
result = Database.ExecuteService(customerId, userId, profile, area, moduleId, service, record, identity);
// Unlock the database
lockDatabase.Commit();
}
catch (System.Exception ex)
{
Exception("An exception occurs on executing the service", ex);
// Rollback the requests done
throw;
}
}
Info($"The service has correctly been executed : {(result == null ? "null" : result.ToString(Formatting.None))}");
return(result);
}
/// <summary>
/// Override the Dispose to write a message on deleting the database context
/// </summary>
/// <param name="disposing"></param>
protected override void Dispose(bool disposing)
{
if (IsVerbose())
{
Verbose($"Deleting {ConfigurationManager.DatabaseProvider} database instance ...");
}
if (_lock != null)
{
_lock.Dispose();
_lock = null;
}
base.Dispose(disposing);
}
/// <summary>
/// Execute a list of requests from a client
/// </summary>
/// <param name="transaction"></param>
/// <returns>RequestId, Error, Record</returns>
public List <Tuple <DSRecord, InformationRecord> > ExecuteTransaction(DSTransaction transaction)
{
Info($"Executing the transaction [{transaction.RequestId}] containing {transaction.Requests.Count} requests ...");
List <Tuple <DSRecord, InformationRecord> > recordsTreated = new List <Tuple <DSRecord, InformationRecord> >();
List <Tuple <string, DSRecord, InformationRecord> > recordsToUpdate = new List <Tuple <string, DSRecord, InformationRecord> >();
// Retrieve the database schema
DSDatabase schema = ConfigurationManager.Schemas[transaction.Area];
if (schema == null)
{
Error("No schema available!");
throw new ExceptionDefinitionRecord("ERR_SCHEMA");
}
// Lock database during the execution of the request
using (DatabaseLock lockDatabase = Database.Lock(transaction.CustomerId))
{
try
{
if (IsVerbose())
{
Verbose("Getting the first tick of the transaction ...");
}
// Get the tick
string tickKey = $"Database.Tick.{transaction.CustomerId}";
int tick = 0;
ParameterRecord tickRecord = Database._Parameter.FirstOrDefault(p => p.Key.Equals(tickKey));
if (tickRecord == null)
{
tickRecord = new ParameterRecord {
Key = tickKey, Value = transaction.Requests.Count.ToString()
};
tickRecord = Database._Parameter.Add(tickRecord);
}
else
{
tick = int.Parse(tickRecord.Value);
tickRecord.Value = (tick + transaction.Requests.Count).ToString();
}
Database.SaveChanges();
if (IsDebug())
{
Debug($"First tick is {tick}");
}
// Execute the OnBefore trigger
if (IsVerbose())
{
Verbose("Executing the pre-request of the transaction ...");
}
transaction.SetNewTick(tick);
foreach (DSRequest request in transaction.Requests)
{
// Execute the request
if (IsVerboseAll())
{
Verbose($"Executing the pre-request[{request.Id}] with tick[{request.NewTick}]: {request} ...");
}
// Execute the trigger before requesting
schema.OnBeforeExecuteRequest(Database, request.NewTick,
transaction.CustomerId, transaction.UserId, transaction.Area, transaction.Profile,
request.Table, request.Action, request.RecordId, request.Record, request.Identity);
}
if (IsDebug())
{
Debug($"Pre-request executed for {transaction.Requests.Count} requests");
}
// Execute each request
if (IsVerbose())
{
Verbose("Executing the transaction ...");
}
// Execution by lot
List <RequestTableRecord> actions = new List <RequestTableRecord>();
int index = 0;
foreach (List <DSRequest> lot in transaction.LotRequests)
{
// Execute the lot of requests
if (IsVerbose())
{
Verbose($"Executing the lot[{index}] with {lot.Count} requests ...");
}
// Execute the lot of requests
recordsTreated.AddRange(schema.ExecuteRequest(Database, transaction, lot));
// Saving data
Database.SaveChanges();
index++;
}
if (IsVerbose())
{
Verbose("Building the list of actions ...");
}
index = 0;
foreach (DSRequest request in transaction.Requests)
{
Tuple <DSRecord, InformationRecord> recordTreated = recordsTreated[index];
// Keep in memory all records executed
recordsToUpdate.Add(Tuple.Create(request.Table, recordTreated.Item1, recordTreated.Item2));
// The request is correctly executed ... Store a new request
actions.Add(new RequestTableRecord
{
Tick = request.NewTick,
CustomerId = transaction.CustomerId,
UserId = transaction.UserId,
RequestId = transaction.RequestId,
Table = request.Table,
Action = request.Action,
Id = (recordTreated == null || recordTreated.Item1 == null ? -1 : recordTreated.Item1.Id)
});
Info($"The request[{request.Id}] has correctly been executed : {(recordTreated == null ? "null" : recordTreated.ToString())}");
index++;
}
if (IsDebug())
{
Debug($"Transaction executed with {transaction.Requests.Count} requests");
}
// Write actions into the RequestTable
if (IsVerbose())
{
Verbose($"Writing {actions.Count} actions into the RequestTable ...");
}
Database._RequestTable.AddRange(actions);
Database.SaveChanges();
if (IsDebug())
{
Debug($"{actions.Count} actions written into the RequestTable");
}
// Execute the OnAfter trigger
if (IsVerbose())
{
Verbose("Executing the post-request of the transaction ...");
}
foreach (DSRequest request in transaction.Requests)
{
// Execute the request
if (IsVerboseAll())
{
Verbose($"Executing the post-request[{request.Id}] with tick[{request.NewTick}]: {request} ...");
}
// Execute the trigger before requesting
DSRecord record = recordsTreated[request.Id].Item1;
if (record != null)
{
schema.OnAfterExecuteRequest(Database, request.NewTick,
transaction.CustomerId, transaction.UserId, transaction.Area, transaction.Profile,
request.Table, request.Action, record.Id, record);
}
}
if (IsDebug())
{
Debug($"Post-request executed for {transaction.Requests.Count} requests");
}
// Unlock the database and commit all changes
if (IsVerbose())
{
Verbose("Committing changes ...");
}
lockDatabase.Commit();
if (IsVerbose())
{
Verbose("Changes committed");
}
// Update the cache manager
if (IsVerbose())
{
Verbose("Updating cache ...");
}
DatabaseCacheManager.Instance.UpdateCache(recordsToUpdate, transaction.CustomerId, tick + transaction.Requests.Count);
if (IsVerbose())
{
Verbose("Cache updated");
}
}
catch (System.Exception ex)
{
Exception("An exception occurs on executing the transaction", ex);
bool saveFailed = false;
do
{
saveFailed = false;
try
{
Database.SaveChanges();
}
catch (DbUpdateException ex2)
{
saveFailed = true;
ex2.Entries.Single().Reload();
}
}while (saveFailed);
// Rollback all request already executed
throw ex;
}
}
Info("Transaction done");
return(recordsTreated);
}
/// <summary>
/// Lock the database for a customer
/// </summary>
/// <param name="customerId"></param>
public DatabaseLock Lock(int customerId)
{
string lockKey = $"Database.Lock.{customerId}";
// Create Database.Lock if the line doesn't exist
ParameterRecord parameterRecord = _Parameter.FirstOrDefault(p => p.Key.Equals(lockKey));
if (parameterRecord == null)
{
parameterRecord = new ParameterRecord()
{
Key = $"Database.Lock.{customerId}", Value = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")
};
parameterRecord = _Parameter.Add(parameterRecord);
SaveChanges();
}
// Lock the database
DbContextTransaction transaction = Database.BeginTransaction();
switch (_provider.Type)
{
case Provider.Provider.EProvider.Oracle:
if (Database.Connection.State != System.Data.ConnectionState.Open)
{
Database.Connection.Open();
}
Database.ExecuteSqlCommand($"UPDATE \"_Parameter\" SET \"Value\" = '{DateTime.Now:yyyy-MM-dd HH:mm:ss}' where \"Key\" = 'Database.Lock.{customerId}'");
break;
case Provider.Provider.EProvider.SQLServer:
if (Database.Connection.State != System.Data.ConnectionState.Open)
{
Database.Connection.Open();
}
Database.ExecuteSqlCommand($"UPDATE [{ConfigurationManager.DatabaseSchema}].[_Parameter] SET [Value] = '{DateTime.Now:yyyy-MM-dd HH:mm:ss}' where [Key] = 'Database.Lock.{customerId}'");
break;
case Provider.Provider.EProvider.Firebird:
if (Database.Connection.State != System.Data.ConnectionState.Open)
{
Database.Connection.Open();
}
Database.ExecuteSqlCommand($"UPDATE \"_Parameter\" SET \"Value\" = '{DateTime.Now:yyyy-MM-dd HH:mm:ss}' where \"Key\" = 'Database.Lock.{customerId}'");
break;
case Provider.Provider.EProvider.MySQL:
if (Database.Connection.State != System.Data.ConnectionState.Open)
{
Database.Connection.Open();
}
Database.ExecuteSqlCommand($"UPDATE `{ConfigurationManager.DatabaseSchema}`.`_Parameter` SET `Value` = '{DateTime.Now:yyyy-MM-dd HH:mm:ss}' where `Key` = 'Database.Lock.{customerId}'");
break;
default:
Warn("Unable to lock the database due to an implementation of locking database missing!");
break;
}
_lock = new DatabaseLock(transaction);
return(_lock);
}
