我正在編寫Akka.Persistence for Service Fabric的實現,並且我似乎無法獲取快照的工作方式。當它嘗試恢復狀態時,它會獲取最新的快照,但它不會重播自最新快照以來的事件。它對我不清楚如果我沒有正確連接組件,或者如果我的持久性庫的實現不正確。 我的演員是一個簡單的計數器,我的狀態只是當前的計數。 我希望恢復應該先被調用,然後在最後一個快照和最高序列號之間爲每個日記條目調用Recover。日記中有一個函數ReplayMessagesAsync(...),它看起來應該這樣做,但它不會被調用。 我的計數器代碼如下,我的代碼的其餘部分是:Code爲什麼Akka.Persistance不會重播我的日誌條目
using Akka.Actor;
using Akka.Persistence;
using Akka.Persistence.ServiceFabric.Journal;
using Akka.Persistence.ServiceFabric.Snapshot;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace AkkaPersistence.Actors
{
public class Counter : ReceivePersistentActor
{
public class GetCount { }
private int counter;
private CounterState State = new CounterState();
private int _msgsSinceLastSnapshot = 0;
public Counter()
{
Recover<Evt>(evt =>
{
State.Update(evt);
});
Recover<SnapshotOffer>(offer => {
var snapshotEntry = offer.Snapshot as SnapshotEntry;
if (snapshotEntry != null)
{
State = (CounterState)snapshotEntry.Snapshot;
}
});
Command<string>(str => Persist(str, s =>
{
++counter;
var evt = new Evt(s);
State.Update(evt);
if (++_msgsSinceLastSnapshot % 10 == 0)
{
//time to save a snapshot
SaveSnapshot(State.Copy());
}
}));
Command<GetCount>(get => Sender.Tell(State.Count));
Command<SaveSnapshotSuccess>(success =>
{
ServiceEventSource.Current.Message($"Saved snapshot");
DeleteMessages(success.Metadata.SequenceNr);
});
Command<SaveSnapshotFailure>(failure => {
// handle snapshot save failure...
ServiceEventSource.Current.Message($"Snapshot failure");
});
}
public override string PersistenceId
{
get
{
return "counter";
}
}
}
internal class CounterState
{
private long count = 0L;
public long Count
{
get { return count; }
set { count = value; }
}
public CounterState(long count)
{
this.Count = count;
}
public CounterState() : this(0)
{
}
public CounterState Copy()
{
return new CounterState(count);
}
public void Update(Evt evt)
{
++Count;
}
}
public class Evt
{
public Evt(string data)
{
Data = data;
}
public string Data { get; }
}
public class Cmd
{
public Cmd(string data)
{
Data = data;
}
public string Data { get; }
}
}