/// <summary>
/// 操作从库，一般是不分主从的set,不能乱了
/// </summary>
/// <param name="fn">fn</param>
/// <returns>bool</returns>
private bool setSlave(Func <IDatabase, bool> fn)
{
int error = 0;
gotHere:
if (this.SlaveServers == null || this.SlaveServers.Length < 1)
{
return(false);
}
int num = 0;
ConnectionMultiplexer conn = null;
for (int i = 0; i < this.SlaveServers.Length; i++)
{
try
{
conn = RedisConnectionManager.GetConnection(this.SlaveServers[i]);
if (conn == null)
{
continue;
}
IDatabase db = conn.GetDatabase(this.SlaveServers[i].DbIndex);
num += fn(db) ? 1 : 0;
}
catch (Exception ex)
{
if (error < 2)
{
if (conn != null)
{
RedisConnectionManager.Dispose(this.SlaveServers[i], conn); // conn = null;
}
error += 1;
System.Threading.Thread.Sleep(1000);
goto gotHere;
}
logger.LogError(ex, "RedisNode.SetSlave.Error");
}
}
return(num == this.SlaveServers.Length);
}
private T GetSlave <T>(Func <IDatabase, T> fn)
{
int error = 0;
gotoHere:
ConnectionMultiplexer conn = null;
int idx = DateTime.Now.Millisecond % SlaveServers.Length; // 如果读从库，随机取
try
{
conn = RedisConnectionManager.GetConnection(SlaveServers[idx]);
if (conn == null)
{
return(default(T));
}
IDatabase db = conn.GetDatabase(this.SlaveServers[idx].DbIndex);
try
{
return(fn(db)); // 回调异常和连接异常分开处理，回调异常是业务处理异常，连接异常底层做重试
}
catch (Exception e)
{
logger.LogError(e, $"RedisNode.GetSlave<T>类型{typeof(T).FullName}转换异常");
return(default(T));
}
}
catch (Exception ex)
{
if (error < 2)
{
if (conn != null)
{
// 释放掉坏连接
RedisConnectionManager.Dispose(SlaveServers[idx], conn);
}
error += 1;
System.Threading.Thread.Sleep(1000);
goto gotoHere;
}
logger.LogError(ex, "RedisNode.GetSlave<T>.Error");
return(default(T));
}
}
/// <summary>
/// 操作主库，一般都是set操作
/// </summary>
/// <param name="fn">fn</param>
/// <returns>bool</returns>
private bool setMaster(Func <IDatabase, bool> fn)
{
int error = 0;
gotoHere:
ConnectionMultiplexer conn = null;
try
{
conn = RedisConnectionManager.GetConnection(this.MasterServer);
if (conn == null)
{
return(false);
}
IDatabase db = conn.GetDatabase(this.MasterServer.DbIndex);
return(fn(db));
}
catch (Exception ex)
{
if (error < 2)//出错可以重试两次
{
if (conn != null)
{
RedisConnectionManager.Dispose(this.MasterServer, conn); // conn = null;//把这个链接设置为空，防止第二次还是被取出来
}
error += 1;
System.Threading.Thread.Sleep(1000);
goto gotoHere;
}
logger.LogError(ex, "RedisNode.setMaster.Error");
return(false);
}
}
