protected static DatabaseAccessProvider <IPlatformDatabaseServices> GetProviderForDatabase(IRuntimeDatabaseConfiguration configurationForDatabase,
DatabaseSettingsSerialization.User user, DatabaseAccessProvider <IPlatformDatabaseServices> systemDatabaseProvider,
IDictionary <string, DatabaseAccessProvider <IPlatformDatabaseServices> > providersByIdentifier,
IDictionary <string, ITransactionManager> transactionManagersByIdentifier)
{
if (configurationForDatabase == null)
{
return(systemDatabaseProvider);
}
bool supportsUnifiedTransactionManager = (user == DatabaseSettingsSerialization.User.Admin) ||
Settings.GetBool(Settings.Configs.SupportUnifiedMDC);
var systemConfig = systemDatabaseProvider.DatabaseServices.DatabaseConfiguration;
string managerIdentifier = supportsUnifiedTransactionManager ?
configurationForDatabase.Username
: configurationForDatabase.DatabaseIdentifier;
string systemManagerIdentifier = supportsUnifiedTransactionManager ?
systemConfig.Username
: systemConfig.DatabaseIdentifier;
bool sameIdentifier = managerIdentifier.EqualsIgnoreCase(systemManagerIdentifier);
// If using the system manager to access the system database, we can use the SystemProvider
bool sameDatabase = configurationForDatabase.DatabaseIdentifier.EqualsIgnoreCase(systemConfig.DatabaseIdentifier);
if (sameIdentifier && sameDatabase)
{
return(systemDatabaseProvider);
}
// In unified MDC scenarios, we want to use a provider with a shared transaction manager
// while keeping the original configuration that uses the correct database identifier
string providerIdentifier = managerIdentifier + (supportsUnifiedTransactionManager ? "-" + configurationForDatabase.DatabaseIdentifier : "");
DatabaseAccessProvider <IPlatformDatabaseServices> provider;
if (!providersByIdentifier.TryGetValue(providerIdentifier, out provider))
{
lock (providersByIdentifier) {
if (!providersByIdentifier.TryGetValue(providerIdentifier, out provider))
{
ITransactionManager manager = sameIdentifier ? systemDatabaseProvider.TransactionManager : null;
if (manager == null && !transactionManagersByIdentifier.TryGetValue(managerIdentifier, out manager))
{
var services = PlatformDatabasePluginProvider
.GetImplementation(configurationForDatabase.ProviderKey())
.GetPlatformDatabaseServices(configurationForDatabase);
manager = services.TransactionService.CreateTransactionManager();
transactionManagersByIdentifier.Add(managerIdentifier, manager);
}
// TODO: Check with the Stack Team if we can optimized this
var dapServices = PlatformDatabasePluginProvider
.GetImplementation(configurationForDatabase.ProviderKey())
.GetPlatformDatabaseServices(configurationForDatabase);
dapServices.IntrospectionService.QueryTimeout = IntrospectionQueryTimeout;
provider = new DatabaseAccessProvider <IPlatformDatabaseServices>(
dapServices,
manager);
providersByIdentifier.Add(providerIdentifier, provider);
}
}
}
return(provider);
}
protected static DatabaseAccessProvider <IPlatformDatabaseServices> GetProviderForDatabase(IRuntimeDatabaseConfiguration configurationForDatabase,
DatabaseSettingsSerialization.User user, DatabaseAccessProvider <IPlatformDatabaseServices> baseProvider,
IDictionary <string, DatabaseAccessProvider <IPlatformDatabaseServices> > providersByIdentifier,
IDictionary <string, ITransactionManager> transactionManagersByIdentifier)
{
if (configurationForDatabase == null)
{
return(baseProvider);
}
// ***************** MDC STUFF ***************************
var databaseConfig = baseProvider.DatabaseServices.DatabaseConfiguration;
string managerIdentifier = configurationForDatabase.Username;
string databaseManagerIdentifier = databaseConfig.Username;
bool sameIdentifier = managerIdentifier.EqualsIgnoreCase(databaseManagerIdentifier);
// If using the system manager to access the system database, we can use the SystemProvider
bool sameDatabase = configurationForDatabase.DatabaseIdentifier.EqualsIgnoreCase(databaseConfig.DatabaseIdentifier);
if (sameIdentifier && sameDatabase)
{
return(baseProvider);
}
// In unified MDC scenarios, we want to use a provider with a shared transaction manager
// while keeping the original configuration that uses the correct database identifier
string providerIdentifier = managerIdentifier + "-" + configurationForDatabase.DatabaseIdentifier;
DatabaseAccessProvider <IPlatformDatabaseServices> provider;
if (!providersByIdentifier.TryGetValue(providerIdentifier, out provider))
{
lock (providersByIdentifier) {
if (!providersByIdentifier.TryGetValue(providerIdentifier, out provider))
{
ITransactionManager manager = sameIdentifier ? baseProvider.TransactionManager : null;
if (manager == null && !transactionManagersByIdentifier.TryGetValue(managerIdentifier, out manager))
{
var services = PlatformDatabasePluginProvider
.GetImplementation(configurationForDatabase.DatabaseProvider.Key)
.GetPlatformDatabaseServices(configurationForDatabase);
manager = services.TransactionService.CreateTransactionManager();
transactionManagersByIdentifier.Add(managerIdentifier, manager);
}
// TODO: Check with the Stack Team if we can optimized this
var dapServices = PlatformDatabasePluginProvider
.GetImplementation(configurationForDatabase.DatabaseProvider.Key)
.GetPlatformDatabaseServices(configurationForDatabase);
provider = new DatabaseAccessProvider <IPlatformDatabaseServices>(
dapServices,
manager);
providersByIdentifier.Add(providerIdentifier, provider);
}
}
}
// ***************** MDC STUFF ***************************
return(provider);
}
