109 lines
3.8 KiB
C#
109 lines
3.8 KiB
C#
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using System.Diagnostics;
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using System.Net;
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using FASTER.core;
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using MemoryPack;
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namespace MyFaster
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{
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[MemoryPackable()]
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public partial class MyData
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{
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public string? FirstName { get; set; }
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public string? LastName { get; set; }
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public int Age { get; set; }
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public string? DetailData { get; set; }
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}
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internal class Program
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{
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public static byte[] Serialize<T>(T obj)
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{
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return MemoryPackSerializer.Serialize(obj);
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}
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public static T Deserialize<T>(byte[] data)
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{
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return MemoryPackSerializer.Deserialize<T>(data);
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}
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public class MyValueSerializer1 : BinaryObjectSerializer<MyData>
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{
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public override void Serialize(ref MyData value)
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{
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writer.Write(value.FirstName);
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writer.Write(value.LastName);
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writer.Write(value.Age);
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writer.Write(value.DetailData);
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}
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public override void Deserialize(out MyData value)
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{
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value = new MyData
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{
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FirstName = reader.ReadString(),
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LastName = reader.ReadString(),
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Age = reader.ReadInt32(),
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DetailData = reader.ReadString()
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};
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}
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}
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public class MyValueSerializer : BinaryObjectSerializer<MyData>
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{
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public override void Serialize(ref MyData value)
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{
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//writer.Write(IPAddress.HostToNetworkOrder(Q.Length)); // 4字节长度头
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var Q = MemoryPackSerializer.Serialize(value);
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writer.Write(Q.Length); // 4字节长度头
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writer.Write(Q);
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}
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public override void Deserialize(out MyData value)
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{
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int length = reader.ReadInt32(); // 读长度头
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byte[] buffer = reader.ReadBytes(length); // 读数据体
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value = MemoryPackSerializer.Deserialize<MyData>(buffer); // 反序列化
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}
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}
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static async Task Main(string[] args)
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{
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using var settings = new FasterKVSettings<string, MyData>()
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{
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LogDevice = Devices.CreateLogDevice("c:/mytemp/log"), // 元数据日志
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ObjectLogDevice = Devices.CreateLogDevice("c:/mytemp/obj"), // 对象数据日志
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TryRecoverLatest = true,
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ValueSerializer = () => new MyValueSerializer()
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};
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using var store = new FasterKV<string, MyData>(settings);
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using var session = store.NewSession(new SimpleFunctions<string, MyData>());
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MyData mydata0 = new MyData() { FirstName = "1", LastName = "fdfdf", DetailData = "detail1" };
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MyData mydata1 = new MyData() { FirstName = "1", LastName = "fdfdf", DetailData = "detail1" };
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MyData mydata2 = new MyData() { FirstName = "1", LastName = "fdfdf", DetailData = "detail1" };
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string mma0 = "a";
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string mma1 = "b";
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string mma2 = "c";
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session.Upsert(ref mma0, ref mydata0);
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session.Upsert(ref mma1, ref mydata1);
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session.Upsert(ref mma2, ref mydata2);
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session.CompletePending(true);
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// 创建增量检查点（性能更好）
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await store.TakeHybridLogCheckpointAsync(CheckpointType.FoldOver);
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// 方法1：完整检查点（推荐）
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await store.TakeFullCheckpointAsync(CheckpointType.Snapshot);
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//完整检查点
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await store.TakeFullCheckpointAsync(CheckpointType.FoldOver);
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MyData output = null;
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var status = session.Read(ref mma0, ref output);
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Console.WriteLine("Hello, World!");
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}
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}
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}
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