50 lines
1.8 KiB
C#
50 lines
1.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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using Sample.MySql.Domain.Entities;
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using ShardingCore.Core.EntityMetadatas;
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using ShardingCore.Core.VirtualRoutes;
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using ShardingCore.Core.VirtualRoutes.DataSourceRoutes.RouteRuleEngine;
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using ShardingCore.VirtualRoutes.Months;
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namespace Sample.MySql.Shardings
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{
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public class SysUserLogByMonthRoute:AbstractSimpleShardingMonthKeyDateTimeVirtualTableRoute<SysUserLogByMonth>
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{
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private readonly ILogger<SysUserLogByMonthRoute> _logger;
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public SysUserLogByMonthRoute(ILogger<SysUserLogByMonthRoute> logger)
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{
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_logger = logger;
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}
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public override DateTime GetBeginTime()
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{
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return new DateTime(2021, 1, 01);
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}
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public override bool AutoCreateTableByTime()
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{
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return true;
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}
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public override void Configure(EntityMetadataTableBuilder<SysUserLogByMonth> builder)
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{
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builder.ShardingProperty(o => o.Time);
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}
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protected override List<TableRouteUnit> AfterShardingRouteUnitFilter(DataSourceRouteResult dataSourceRouteResult, List<TableRouteUnit> shardingRouteUnits)
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{
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if (shardingRouteUnits.Count > 10)
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{
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_logger.LogInformation("截断前:"+string.Join(",",shardingRouteUnits.Select(o=>o.Tail)));
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//这边你要自己做顺序处理阶段
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var result= shardingRouteUnits.OrderByDescending(o=>o.Tail).Take(10).ToList();
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_logger.LogInformation("截断后:"+string.Join(",",result.Select(o=>o.Tail)));
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return result;
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}
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return base.AfterShardingRouteUnitFilter(dataSourceRouteResult, shardingRouteUnits);
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}
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}
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}
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