/// ------------------------------------------------------------------------------------
/// <summary>
/// Create a new db4o database. Removes old one if exists.
/// </summary>
/// ------------------------------------------------------------------------------------
protected override void CreateInternal()
{
BasicInit();
try
{
if (m_localHost)
{
Db4oServerInfo info = GetDb4OServerInfo(m_host, Db4OServerFinder.ServiceDiscoveryPort);
info.CreateServerFile(ProjectId.Name);
// Ask Service for connection port.
RequestDatabaseStart();
}
StartClientOnRemoteServer();
// Store model version number;
m_modelVersionNumber = new ModelVersionNumber { m_modelVersionNumber = m_modelVersionOverride };
m_dbStore.Store(m_modelVersionNumber);
m_dbStore.Commit();
}
catch (SocketException e)
{
throw new StartupException(string.Format(Strings.ksCannotConnectToServer, "FwRemoteDatabaseConnectorService"), e);
}
catch (Exception err)
{
StopClient();
RequestServerShutdown();
throw;
}
}
/// ------------------------------------------------------------------------------------
/// <summary>
/// Start up the back end.
/// </summary>
/// <param name="currentModelVersion">The current model version.</param>
/// <returns>The data store's current version number.</returns>
/// ------------------------------------------------------------------------------------
protected override int StartupInternal(int currentModelVersion)
{
BasicInit();
// Ask Service for connection port.
RequestDatabaseStart();
// Currently we don't support local-client mode.
//if (m_localHost)
//{
// OpenServerFile();
// StartClientOnLocalServer();
//}
//else
StartClientOnRemoteServer();
// DB4O always returns current state of objects when queries are done - need to use
// lock so we can get a consistent state for starting.
GetCommitLock(true);
try
{
//--( Load model version number, and check against current number. )--//
m_modelVersionNumber = m_dbStore.Query<ModelVersionNumber>()[0];
var currentDataStoreVersion = m_modelVersionNumber.m_modelVersionNumber;
var needConversion = (currentDataStoreVersion != currentModelVersion);
if (m_restarting)
{
Debug.Assert(currentDataStoreVersion == currentModelVersion);
m_restarting = false; // need to set explicitly before each call.
return currentDataStoreVersion;
}
//--( Load custom fields )--/
var customFields = new List<CustomFieldInfo>();
foreach (CustomFieldInfo customField in m_dbStore.Query<CustomFieldInfo>().ToArray())
{
CustomFieldInfo dupInfo;
if (m_myKnownCustomFields.TryGetValue(customField.Key, out dupInfo))
{
// This should never happen, but somehow some databases are around which have the problem.
// Try to correct it. (The flids may not match exactly. See LT-11486.)
if (dupInfo.AlmostEquals(customField))
{
m_dbStore.Delete(customField);
m_dbStore.Commit();
continue;
}
// If they are NOT (almost) equal, we will go ahead and crash :-<
}
customFields.Add(customField);
m_myKnownCustomFields.Add(customField.Key, customField);
}
RegisterOriginalCustomProperties(customFields);
//--( Load surrogates )--/
var generations = from CommitData cd in m_dbStore select cd.WriteGeneration;
m_lastWriteGenerationSeen = 0;
if (generations.Count() > 0)
m_lastWriteGenerationSeen = generations.Max();
Db4oServerInfo info = GetDb4OServerInfo(m_host, Db4OServerFinder.ServiceDiscoveryPort);
long[] ids;
var objs = info.GetCmObjectSurrogates(ProjectId.Name);
using (var decompressoar = new CmObjectSurrogateStreamDecompressor(objs, m_cache, m_identityMap, m_idMap))
{
foreach (CmObjectSurrogate surrogate in decompressoar)
{
if (needConversion)
RegisterSurrogateForConversion(surrogate);
else
RegisterInactiveSurrogate(surrogate);
}
}
return currentDataStoreVersion;
}
catch (SocketException e)
{
throw new StartupException(string.Format(Strings.ksCannotConnectToServer, "FwRemoteDatabaseConnectorService"), e);
}
finally
{
ReleaseCommitLock();
}
}
