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拆分 FreeSql 按需引用
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60
Providers/FreeSql.Provider.Sqlite/SqliteAdo/SqliteAdo.cs
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60
Providers/FreeSql.Provider.Sqlite/SqliteAdo/SqliteAdo.cs
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using FreeSql.Internal;
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using SafeObjectPool;
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using System;
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using System.Collections;
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using System.Data.Common;
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using System.Data.SQLite;
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using System.Text;
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using System.Threading;
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namespace FreeSql.Sqlite {
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class SqliteAdo : FreeSql.Internal.CommonProvider.AdoProvider {
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public SqliteAdo() : base(DataType.Sqlite) { }
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public SqliteAdo(CommonUtils util, string masterConnectionString, string[] slaveConnectionStrings) : base(DataType.Sqlite) {
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base._util = util;
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if (!string.IsNullOrEmpty(masterConnectionString))
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MasterPool = new SqliteConnectionPool("主库", masterConnectionString, null, null);
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if (slaveConnectionStrings != null) {
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foreach (var slaveConnectionString in slaveConnectionStrings) {
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var slavePool = new SqliteConnectionPool($"从库{SlavePools.Count + 1}", slaveConnectionString, () => Interlocked.Decrement(ref slaveUnavailables), () => Interlocked.Increment(ref slaveUnavailables));
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SlavePools.Add(slavePool);
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}
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}
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}
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static DateTime dt1970 = new DateTime(1970, 1, 1);
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public override object AddslashesProcessParam(object param, Type mapType) {
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if (param == null) return "NULL";
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if (mapType != null && mapType != param.GetType())
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param = Utils.GetDataReaderValue(mapType, param);
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if (param is bool || param is bool?)
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return (bool)param ? 1 : 0;
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else if (param is string || param is char)
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return string.Concat("'", param.ToString().Replace("'", "''"), "'");
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else if (param is Enum)
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return ((Enum)param).ToInt64();
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else if (decimal.TryParse(string.Concat(param), out var trydec))
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return param;
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else if (param is DateTime || param is DateTime?)
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return string.Concat("'", ((DateTime)param).ToString("yyyy-MM-dd HH:mm:ss"), "'");
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else if (param is TimeSpan || param is TimeSpan?)
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return ((TimeSpan)param).Ticks / 10000;
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else if (param is IEnumerable) {
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var sb = new StringBuilder();
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var ie = param as IEnumerable;
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foreach (var z in ie) sb.Append(",").Append(AddslashesProcessParam(z, mapType));
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return sb.Length == 0 ? "(NULL)" : sb.Remove(0, 1).Insert(0, "(").Append(")").ToString();
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}
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return string.Concat("'", param.ToString().Replace("'", "''"), "'");
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}
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protected override DbCommand CreateCommand() {
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return new SQLiteCommand();
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}
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protected override void ReturnConnection(ObjectPool<DbConnection> pool, Object<DbConnection> conn, Exception ex) {
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(pool as SqliteConnectionPool).Return(conn, ex);
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}
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protected override DbParameter[] GetDbParamtersByObject(string sql, object obj) => _util.GetDbParamtersByObject(sql, obj);
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}
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}
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@ -0,0 +1,214 @@
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using SafeObjectPool;
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Data;
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using System.Data.Common;
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using System.Data.SQLite;
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using System.Linq;
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using System.Text;
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using System.Text.RegularExpressions;
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using System.Threading.Tasks;
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namespace FreeSql.Sqlite {
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class SqliteConnectionPool : ObjectPool<DbConnection> {
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internal Action availableHandler;
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internal Action unavailableHandler;
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public SqliteConnectionPool(string name, string connectionString, Action availableHandler, Action unavailableHandler) : base(null) {
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policy = new SqliteConnectionPoolPolicy {
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_pool = this,
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Name = name
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};
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this.Policy = policy;
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policy.ConnectionString = connectionString;
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this.availableHandler = availableHandler;
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this.unavailableHandler = unavailableHandler;
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}
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public void Return(Object<DbConnection> obj, Exception exception, bool isRecreate = false) {
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if (exception != null && exception is SQLiteException) {
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try { if (obj.Value.Ping() == false) obj.Value.OpenAndAttach(policy.Attaches); } catch { base.SetUnavailable(exception); }
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}
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base.Return(obj, isRecreate);
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}
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internal SqliteConnectionPoolPolicy policy;
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}
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class SqliteConnectionPoolPolicy : IPolicy<DbConnection> {
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internal SqliteConnectionPool _pool;
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public string Name { get; set; } = "Sqlite SQLiteConnection 对象池";
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public int PoolSize { get; set; } = 100;
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public TimeSpan SyncGetTimeout { get; set; } = TimeSpan.FromSeconds(10);
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public TimeSpan IdleTimeout { get; set; } = TimeSpan.Zero;
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public int AsyncGetCapacity { get; set; } = 10000;
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public bool IsThrowGetTimeoutException { get; set; } = true;
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public int CheckAvailableInterval { get; set; } = 5;
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public string[] Attaches = new string[0];
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static ConcurrentDictionary<string, int> dicConnStrIncr = new ConcurrentDictionary<string, int>(StringComparer.CurrentCultureIgnoreCase);
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private string _connectionString;
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public string ConnectionString {
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get => _connectionString;
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set {
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_connectionString = value ?? "";
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var pattern = @"Max\s*pool\s*size\s*=\s*(\d+)";
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Match m = Regex.Match(_connectionString, pattern, RegexOptions.IgnoreCase);
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if (m.Success == false || int.TryParse(m.Groups[1].Value, out var poolsize) == false || poolsize <= 0) poolsize = 100;
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var connStrIncr = dicConnStrIncr.AddOrUpdate(_connectionString, 1, (oldkey, oldval) => oldval + 1);
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PoolSize = poolsize + connStrIncr;
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_connectionString = m.Success ?
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Regex.Replace(_connectionString, pattern, $"Max pool size={PoolSize}", RegexOptions.IgnoreCase) :
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$"{_connectionString};Max pool size={PoolSize}";
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pattern = @"Connection\s*LifeTime\s*=\s*(\d+)";
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m = Regex.Match(_connectionString, pattern, RegexOptions.IgnoreCase);
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if (m.Success) {
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IdleTimeout = TimeSpan.FromSeconds(int.Parse(m.Groups[1].Value));
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_connectionString = Regex.Replace(_connectionString, pattern, "", RegexOptions.IgnoreCase);
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}
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var minPoolSize = 0;
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pattern = @"Min\s*pool\s*size\s*=\s*(\d+)";
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m = Regex.Match(_connectionString, pattern, RegexOptions.IgnoreCase);
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if (m.Success) {
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minPoolSize = int.Parse(m.Groups[1].Value);
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_connectionString = Regex.Replace(_connectionString, pattern, "", RegexOptions.IgnoreCase);
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}
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var att = Regex.Split(_connectionString, @"Attachs\s*=\s*", RegexOptions.IgnoreCase);
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if (att.Length == 2) {
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var idx = att[1].IndexOf(';');
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Attaches = (idx == -1 ? att[1] : att[1].Substring(0, idx)).Split(',');
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}
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FreeSql.Internal.CommonUtils.PrevReheatConnectionPool(_pool, minPoolSize);
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}
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}
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public bool OnCheckAvailable(Object<DbConnection> obj) {
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if (obj.Value.State == ConnectionState.Closed) obj.Value.OpenAndAttach(Attaches);
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return obj.Value.Ping(true);
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}
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public DbConnection OnCreate() {
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var conn = new SQLiteConnection(_connectionString);
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return conn;
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}
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public void OnDestroy(DbConnection obj) {
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if (obj.State != ConnectionState.Closed) obj.Close();
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obj.Dispose();
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}
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public void OnGet(Object<DbConnection> obj) {
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if (_pool.IsAvailable) {
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if (obj.Value.State != ConnectionState.Open || DateTime.Now.Subtract(obj.LastReturnTime).TotalSeconds > 60 && obj.Value.Ping() == false) {
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try {
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obj.Value.OpenAndAttach(Attaches);
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} catch (Exception ex) {
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if (_pool.SetUnavailable(ex) == true)
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throw new Exception($"【{this.Name}】状态不可用，等待后台检查程序恢复方可使用。{ex.Message}");
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}
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}
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}
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}
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async public Task OnGetAsync(Object<DbConnection> obj) {
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if (_pool.IsAvailable) {
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if (obj.Value.State != ConnectionState.Open || DateTime.Now.Subtract(obj.LastReturnTime).TotalSeconds > 60 && (await obj.Value.PingAsync()) == false) {
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try {
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await obj.Value.OpenAndAttachAsync(Attaches);
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} catch (Exception ex) {
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if (_pool.SetUnavailable(ex) == true)
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throw new Exception($"【{this.Name}】状态不可用，等待后台检查程序恢复方可使用。{ex.Message}");
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}
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}
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}
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}
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public void OnGetTimeout() {
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}
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public void OnReturn(Object<DbConnection> obj) {
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}
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public void OnAvailable() {
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_pool.availableHandler?.Invoke();
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}
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public void OnUnavailable() {
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_pool.unavailableHandler?.Invoke();
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}
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}
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static class DbConnectionExtensions {
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static DbCommand PingCommand(DbConnection conn) {
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var cmd = conn.CreateCommand();
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cmd.CommandTimeout = 5;
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cmd.CommandText = "select 1";
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return cmd;
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}
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public static bool Ping(this DbConnection that, bool isThrow = false) {
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try {
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PingCommand(that).ExecuteNonQuery();
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return true;
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} catch {
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if (that.State != ConnectionState.Closed) try { that.Close(); } catch { }
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if (isThrow) throw;
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return false;
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}
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}
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async public static Task<bool> PingAsync(this DbConnection that, bool isThrow = false) {
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try {
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await PingCommand(that).ExecuteNonQueryAsync();
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return true;
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} catch {
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if (that.State != ConnectionState.Closed) try { that.Close(); } catch { }
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if (isThrow) throw;
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return false;
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}
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}
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public static void OpenAndAttach(this DbConnection that, string[] attach) {
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that.Open();
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if (attach?.Any() == true) {
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var sb = new StringBuilder();
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foreach(var att in attach)
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sb.Append($"attach database [{att}] as [{att.Split('.').First()}];\r\n");
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var cmd = that.CreateCommand();
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cmd.CommandText = sb.ToString();
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cmd.ExecuteNonQuery();
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}
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}
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async public static Task OpenAndAttachAsync(this DbConnection that, string[] attach) {
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await that.OpenAsync();
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if (attach?.Any() == true) {
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var sb = new StringBuilder();
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foreach (var att in attach)
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sb.Append($"attach database [{att}] as [{att.Split('.').First()}];\r\n");
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var cmd = that.CreateCommand();
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cmd.CommandText = sb.ToString();
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await cmd.ExecuteNonQueryAsync();
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}
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}
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}
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}
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