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- 修复 Ado.Query 查询字段重复时报错；#162 #165 #161 - 增加 FreeSql.Provider.MsAccess 支持 Access 数据库操作，已通过 2003/2007 版本测试；

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28810
2019-12-24 06:16:52 +08:00
parent d5ed1c8a30
commit a92c279c72
69 changed files with 10380 additions and 207 deletions
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77
Providers/FreeSql.Provider.MsAccess/MsAccessAdo/MsAccessAdo.cs Normal file
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using FreeSql.Internal;
using FreeSql.Internal.Model;
using SafeObjectPool;
using System;
using System.Collections;
using System.Data.Common;
using System.Data.OleDb;
using System.Linq;
using System.Text;
using System.Threading;
namespace FreeSql.MsAccess
{
class MsAccessAdo : FreeSql.Internal.CommonProvider.AdoProvider
{
public MsAccessAdo() : base(DataType.MsAccess) { }
public MsAccessAdo(CommonUtils util, string masterConnectionString, string[] slaveConnectionStrings, Func<DbConnection> connectionFactory) : base(DataType.MsAccess)
{
base._util = util;
if (connectionFactory != null)
{
MasterPool = new FreeSql.Internal.CommonProvider.DbConnectionPool(DataType.MsAccess, connectionFactory);
return;
}
if (!string.IsNullOrEmpty(masterConnectionString))
MasterPool = new MsAccessConnectionPool("主库", masterConnectionString, null, null);
if (slaveConnectionStrings != null)
{
foreach (var slaveConnectionString in slaveConnectionStrings)
{
var slavePool = new MsAccessConnectionPool($"从库{SlavePools.Count + 1}", slaveConnectionString, () => Interlocked.Decrement(ref slaveUnavailables), () => Interlocked.Increment(ref slaveUnavailables));
SlavePools.Add(slavePool);
}
}
}
public override object AddslashesProcessParam(object param, Type mapType, ColumnInfo mapColumn)
{
if (param == null) return "NULL";
if (mapType != null && mapType != param.GetType() && (param is IEnumerable == false || mapType.IsArrayOrList()))
param = Utils.GetDataReaderValue(mapType, param);
if (param is bool || param is bool?)
return (bool)param ? -1 : 0;
else if (param is string || param is char)
return string.Concat("'", param.ToString().Replace("'", "''"), "'");
else if (param is Enum)
return ((Enum)param).ToInt64();
else if (decimal.TryParse(string.Concat(param), out var trydec))
return param;
else if (param is DateTime || param is DateTime?)
{
if (param.Equals(DateTime.MinValue) == true) param = new DateTime(1970, 1, 1);
return string.Concat("'", ((DateTime)param).ToString("yyyy-MM-dd HH:mm:ss"), "'");
}
else if (param is TimeSpan || param is TimeSpan?)
return ((TimeSpan)param).TotalSeconds;
else if (param is IEnumerable)
return AddslashesIEnumerable(param, mapType, mapColumn);
return string.Concat("'", param.ToString().Replace("'", "''"), "'");
}
protected override DbCommand CreateCommand()
{
return new OleDbCommand();
}
protected override void ReturnConnection(IObjectPool<DbConnection> pool, Object<DbConnection> conn, Exception ex)
{
var rawPool = pool as MsAccessConnectionPool;
if (rawPool != null) rawPool.Return(conn, ex);
else pool.Return(conn);
}
protected override DbParameter[] GetDbParamtersByObject(string sql, object obj) => _util.GetDbParamtersByObject(sql, obj);
}
}

242
Providers/FreeSql.Provider.MsAccess/MsAccessAdo/MsAccessConnectionPool.cs Normal file
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using SafeObjectPool;
using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Data.OleDb;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
namespace FreeSql.MsAccess
{
class MsAccessConnectionPool : ObjectPool<DbConnection>
{
internal Action availableHandler;
internal Action unavailableHandler;
public MsAccessConnectionPool(string name, string connectionString, Action availableHandler, Action unavailableHandler) : base(null)
{
var policy = new AccessConnectionPoolPolicy
{
_pool = this,
Name = name
};
this.Policy = policy;
policy.ConnectionString = connectionString;
this.availableHandler = availableHandler;
this.unavailableHandler = unavailableHandler;
}
public void Return(Object<DbConnection> obj, Exception exception, bool isRecreate = false)
{
if (exception != null && exception is OleDbException)
{
if (obj.Value.Ping() == false)
{
base.SetUnavailable(exception);
}
}
base.Return(obj, isRecreate);
}
}
class AccessConnectionPoolPolicy : IPolicy<DbConnection>
{
internal MsAccessConnectionPool _pool;
public string Name { get; set; } = "Microsoft Access OleDbConnection 对象池";
public int PoolSize { get; set; } = 100;
public TimeSpan SyncGetTimeout { get; set; } = TimeSpan.FromSeconds(30);
public TimeSpan IdleTimeout { get; set; } = TimeSpan.Zero;
public int AsyncGetCapacity { get; set; } = 10000;
public bool IsThrowGetTimeoutException { get; set; } = true;
public int CheckAvailableInterval { get; set; } = 5;
private string _connectionString;
public string ConnectionString
{
get => _connectionString;
set
{
_connectionString = value ?? "";
var pattern = @"Max\s*pool\s*size\s*=\s*(\d+)";
Match m = Regex.Match(_connectionString, pattern, RegexOptions.IgnoreCase);
if (m.Success)
{
if (int.TryParse(m.Groups[1].Value, out var poolsize) && poolsize > 0)
PoolSize = poolsize;
_connectionString = Regex.Replace(_connectionString, pattern, "", RegexOptions.IgnoreCase);
}
pattern = @"Connection\s*LifeTime\s*=\s*(\d+)";
m = Regex.Match(_connectionString, pattern, RegexOptions.IgnoreCase);
if (m.Success)
{
IdleTimeout = TimeSpan.FromSeconds(int.Parse(m.Groups[1].Value));
_connectionString = Regex.Replace(_connectionString, pattern, "", RegexOptions.IgnoreCase);
}
var minPoolSize = 0;
pattern = @"Min\s*pool\s*size\s*=\s*(\d+)";
m = Regex.Match(_connectionString, pattern, RegexOptions.IgnoreCase);
if (m.Success)
{
minPoolSize = int.Parse(m.Groups[1].Value);
_connectionString = Regex.Replace(_connectionString, pattern, "", RegexOptions.IgnoreCase);
}
FreeSql.Internal.CommonUtils.PrevReheatConnectionPool(_pool, minPoolSize);
}
}
public bool OnCheckAvailable(Object<DbConnection> obj)
{
if (obj.Value.State == ConnectionState.Closed) obj.Value.Open();
return obj.Value.Ping(true);
}
public DbConnection OnCreate()
{
var conn = new OleDbConnection(_connectionString);
return conn;
}
public void OnDestroy(DbConnection obj)
{
if (obj.State != ConnectionState.Closed) obj.Close();
obj.Dispose();
}
public void OnGet(Object<DbConnection> obj)
{
if (_pool.IsAvailable)
{
if (obj.Value == null)
{
if (_pool.SetUnavailable(new Exception("连接字符串错误")) == true)
throw new Exception($"【{this.Name}】连接字符串错误，请检查。");
return;
}
if (obj.Value.State != ConnectionState.Open || DateTime.Now.Subtract(obj.LastReturnTime).TotalSeconds > 60 && obj.Value.Ping() == false)
{
try
{
obj.Value.Open();
}
catch (Exception ex)
{
if (_pool.SetUnavailable(ex) == true)
throw new Exception($"【{this.Name}】状态不可用，等待后台检查程序恢复方可使用。{ex.Message}");
}
}
}
}
#if net40
#else
async public Task OnGetAsync(Object<DbConnection> obj)
{
if (_pool.IsAvailable)
{
if (obj.Value == null)
{
if (_pool.SetUnavailable(new Exception("连接字符串错误")) == true)
throw new Exception($"【{this.Name}】连接字符串错误，请检查。");
return;
}
if (obj.Value.State != ConnectionState.Open || DateTime.Now.Subtract(obj.LastReturnTime).TotalSeconds > 60 && (await obj.Value.PingAsync()) == false)
{
try
{
await obj.Value.OpenAsync();
}
catch (Exception ex)
{
if (_pool.SetUnavailable(ex) == true)
throw new Exception($"【{this.Name}】状态不可用，等待后台检查程序恢复方可使用。{ex.Message}");
}
}
}
}
#endif
public void OnGetTimeout()
{
}
public void OnReturn(Object<DbConnection> obj)
{
if (obj.Value.State != ConnectionState.Closed) try { obj.Value.Close(); } catch { }
}
public void OnAvailable()
{
_pool.availableHandler?.Invoke();
}
public void OnUnavailable()
{
_pool.unavailableHandler?.Invoke();
}
}
static class DbConnectionExtensions
{
static DbCommand PingCommand(DbConnection conn)
{
var cmd = conn.CreateCommand();
cmd.CommandTimeout = 5;
cmd.CommandText = "select 1";
return cmd;
}
public static bool Ping(this DbConnection that, bool isThrow = false)
{
try
{
PingCommand(that).ExecuteNonQuery();
return true;
}
catch
{
if (that.State != ConnectionState.Closed) try { that.Close(); } catch { }
if (isThrow) throw;
return false;
}
}
#if net40
#else
async public static Task<bool> PingAsync(this DbConnection that, bool isThrow = false)
{
try
{
await PingCommand(that).ExecuteNonQueryAsync();
return true;
}
catch
{
if (that.State != ConnectionState.Closed) try { that.Close(); } catch { }
if (isThrow) throw;
return false;
}
}
#endif
}
}