/// <summary>
/// Регистрация секции базы данных.
/// </summary>
/// <param name="info">Информация о цекции бд.</param>
/// <returns>Элемент управления секцией бд. </returns>
public DbSectionProxy RegisterDbSection(DbSectionInfo info)
{
if (info == null) throw new ArgumentNullException("info");
var fullSectionInfo = new DbSection(info, () => Resolve(info.DbSectionId));
//if already registered: return registered proxy.
if (!_dbSections.TryAdd(info.DbSectionId, fullSectionInfo))
{
DbSection dbSection;
if (_dbSections.TryGetValue(info.DbSectionId, out dbSection))
{
return dbSection.Proxy;
}
}
return fullSectionInfo.Proxy;
}
private void UpdateDbSection(DbSection section)
{
var updateScripts = GetUpdateScripts(section.DbSectionInfo.RequiredVersion,
section.CurrentDbSectionState.SectionVersion, section.DbSectionInfo.DbScripts.UpdateScripts);
_dbProvider.TryUpdateSection(section.DbSectionInfo.DbSectionId, updateScripts);
}
private void CreateDbSection(DbSection section)
{
_dbProvider.TryCreateSection(section.DbSectionInfo.DbSectionId, section.DbSectionInfo.DbScripts.CreateScript);
}
/// <summary>
/// Попытка разрешить конфликтов секции бд.
/// </summary>
/// <param name="section">Инфорация о секции</param>
private void ResolveSection(DbSection section)
{
switch (section.CurrentDbSectionState.DbSectionStatus)
{
case DbSectionStatus.Ok:
case DbSectionStatus.Newer:
case DbSectionStatus.Unknown:
case DbSectionStatus.Error:
break;
case DbSectionStatus.NotExists:
CreateDbSection(section);
break;
case DbSectionStatus.Outdated:
UpdateDbSection(section);
break;
default:
LogManager.ExceptionLog.Error("Wrong Section State");
break;
}
}
private void UpdateDataBase(DbSection section)
{
var baseStructureScripts = _dbProvider.GetDbSchemaScripts();
var updateScripts = GetUpdateScripts(_dbControllerVersion, section.CurrentDbSectionState.DbState.Version, baseStructureScripts.UpdateScripts);
_dbProvider.TryUpdate(updateScripts);
}
private void DoResolve(DbSection sectionInfo)
{
switch (sectionInfo.CurrentDbSectionState.DbState.Status)
{
case DbStatus.Unknown:
case DbStatus.NotAvailable:
case DbStatus.Invalid:
break;
case DbStatus.Outdated:
UpdateDataBase(sectionInfo);
break;
case DbStatus.NoSchema:
CreateDbSchema();
break;
case DbStatus.Ok:
ResolveSection(sectionInfo);
break;
case DbStatus.NotExists:
CreateDataBase();
break;
default:
LogManager.ExceptionLog.Error("wrong Db State");
break;
}
}
/// <summary>
/// Создать элемент управления секцией БД.
/// </summary>
/// <param name="resolveAction">Метод, вызываемый при попытке разрешить конфликт с бд.</param>
/// <param name="getStateFunc">Метод для получения состояния.</param>
/// <param name="dbSection">Секцияя бд, которой управляет данный элемент. </param>
internal DbSectionProxy(Action resolveAction, Func<DbSectionState> getStateFunc, DbSection dbSection)
{
_resolveAction = resolveAction;
_getStateFunc = getStateFunc;
dbSection.DbSectionStateChanged+=OnDbSectionStateChanged;
}
