数据库连接池Data Connection Framework具备Connection pooling机制能管理不同的 Connection并通过池对象工厂去PoolObjectFactory去创建数据连接池(可参考对象工厂创建 Singleton ObjectSingleCall ObjectPool Object )
连接池企业应用组件图如下
主要文件代码
/// <summary>
/// 连接池上下文
/// </summary>
public sealed class ConnectionPoolContext : IDisposable
{
/// <summary>
/// 池对象工厂
/// </summary>
private PoolObjectFactory _factory;
/// <summary>
/// 默认连接字符
/// </summary>
private string _defaultConnectionString;
/// <summary>
/// 工厂名称
/// </summary>
private string _factoryName;
/// <summary>
/// 类型
/// </summary>
private Type _factoryType;
/// <summary>
/// SQL状态仓库
/// </summary>
private SqlStatementRepository _statementRepository;
/// <summary>
/// 连接池
/// </summary>
private static Dictionary<string ConnectionPoolContext> _instances = new Dictionary<string ConnectionPoolContext>();
/// <summary>
/// 默认连接字符属性
/// </summary>
public string DefaultConnectionString
{
get
{
return _defaultConnectionString;
}
set
{
_defaultConnectionString = value;
}
}
/// <summary>
/// 工厂名
/// </summary>
public string FactoryName
{
get
{
return _factoryName;
}
set
{
_factoryName = value;
}
}
/// <summary>
/// SQL状态仓库属性
/// </summary>
public SqlStatementRepository StatementRepository
{
get
{
if (_statementRepository == null)
_statementRepository = new SqlStatementRepository();
return _statementRepository;
}
}
/// <summary>
/// 对象工厂模式
/// </summary>
internal PoolObjectFactory Factory
{
get
{
return _factory;
}
set
{
_factory = value;
}
}
/// <summary>
/// 实例化一个连接池
/// </summary>
/// <param name=id></param>
/// <returns></returns>
public static ConnectionPoolContext Instance(string id)
{
