public DbContext Resolve(DBSelector dbSelector = DBSelector.Master)
{
DbContext dbContext = null;
if (dbSelector.Equals(DBSelector.Master))
{
_cacheDbContext.TryGetValue(dbSelector, out dbContext);
}
//ISSUE:A second operation started on this context before a previous operation completed. Any instance members are not guaranteed to be thread safe
//We do it in temprary, we must optimzie the Framewrok to resolve the multiple thread to call DbContext.
else
{
_slaveCacheDbContext.TryGetValue(Thread.CurrentThread.ManagedThreadId, out dbContext);
}
if (dbContext != null)
{
return(dbContext);
}
var configurer = new AbpDbContextConfiguration <TDbContext>(_dbOptions.DbConnections[dbSelector]);
_dbContextConfigurer.Configure(configurer);
var actualContext = typeof(TDbContext);
dbContext = (DbContext)Activator.CreateInstance(actualContext, configurer.DbContextOptions.Options);
if (dbSelector.Equals(DBSelector.Master))
{
_cacheDbContext.Add(dbSelector, dbContext);
}
else
{
_slaveCacheDbContext.Add(Thread.CurrentThread.ManagedThreadId, dbContext);
}
return(dbContext);
}
public void Configure(AbpDbContextConfiguration <TDbContext> configuration)
{
Action(configuration);
IDbResolve dbResolve = (IDbResolve)serviceProvider.GetService(typeof(IDbResolve));
configuration.DbContextOptions.UseMySQL(dbResolve.GetConnectionString());
}
public DbContext Resolve(DBSelector dbSelector = DBSelector.Master)
{
DbContext dbContext;
CacheDbContext.TryGetValue(dbSelector, out dbContext);
if (dbContext != null)
{
return(dbContext);
}
var configurer = new AbpDbContextConfiguration <TDbContext>(dbOptions.DbConnections[dbSelector]);
dbContextConfigurer.Configure(configurer);
var actualContext = typeof(TDbContext);
dbContext = (DbContext)Activator.CreateInstance(actualContext, configurer.DbContextOptions.Options);
CacheDbContext.Add(dbSelector, dbContext);
return(dbContext);
}
protected virtual DbContextOptions <TDbContext> CreateOptions <TDbContext>([NotNull] string connectionString, [CanBeNull] DbConnection existingConnection) where TDbContext : DbContext
{
if (_iocResolver.IsRegistered <IAbpDbContextConfigurer <TDbContext> >())
{
var configuration = new AbpDbContextConfiguration <TDbContext>(connectionString, existingConnection);
using (var configurer = _iocResolver.ResolveAsDisposable <IAbpDbContextConfigurer <TDbContext> >())
{
configurer.Object.Configure(configuration);
}
return(configuration.DbContextOptions.Options);
}
if (_iocResolver.IsRegistered <DbContextOptions <TDbContext> >())
{
return(_iocResolver.Resolve <DbContextOptions <TDbContext> >());
}
throw new AbpException($"Could not resolve DbContextOptions for {typeof(TDbContext).AssemblyQualifiedName}.");
}
protected virtual void ReplaceServices <TDbContext>(AbpDbContextConfiguration <TDbContext> configuration) where TDbContext : DbContext
{
configuration.DbContextOptions.ReplaceService <IEntityMaterializerSource, AbpEntityMaterializerSource>();
}
public static void UseMySQL(this AbpDbContextConfiguration <LeeAbpDbContext> dbContextOptions)
{
//连接字符串在EF所在Module中设置；
dbContextOptions.DbContextOptions.UseMySQL(dbContextOptions.ConnectionString);
}
/// <summary>
/// 利用此方法从核心数据库中获取各个租户的数据库连接信息；
/// </summary>
/// <param name="dbContextOptions"></param>
/// <param name="dbResolve"></param>
public static void UseMySQL(this AbpDbContextConfiguration <LeeAbpDbContext> dbContextOptions, IDbResolve dbResolve)
{
//连接字符串在EF所在Module中设置；
dbContextOptions.DbContextOptions.UseMySQL(dbResolve.GetConnectionString());
}
