/// <summary>
/// 定时刷新灾备状态，主要根据灾备目录下对应文件的内容
/// </summary>
private void SwitchRefresher()
{
_switchRefresher = new Timer(x =>
{
try
{
string filePath = Path.Combine(_failoverDir, UtilAndComs.FAILOVER_SWITCH);
if (!DiskCache.IsFileExists(filePath))
{
_switchParams.AddOrUpdate(FAILOVER_MODE_NAME, "false", (k, v) => "false");
_logger.Debug($"failover switch is not found, {filePath}");
return;
}
long modified = DiskCache.GetFileLastModifiedTime(filePath);
if (_failoverLastModifiedMillis < modified)
{
_failoverLastModifiedMillis = modified;
string failover = DiskCache.ReadFile(filePath);
if (!string.IsNullOrEmpty(failover))
{
var lines = failover.Split(new string[] { DiskCache.GetLineSeparator() }, StringSplitOptions.RemoveEmptyEntries);
foreach (var line in lines)
{
if ("1".Equals(line.Trim()))
{
_switchParams.AddOrUpdate(FAILOVER_MODE_NAME, "true", (k, v) => "true");
_logger.Info($"{FAILOVER_MODE_NAME} is on");
FailoverFileReader();
}
else if ("0".Equals(line.Trim()))
{
_switchParams.AddOrUpdate(FAILOVER_MODE_NAME, "false", (k, v) => "false");
_logger.Info($"{FAILOVER_MODE_NAME} is off");
}
}
}
else
{
_switchParams.AddOrUpdate(FAILOVER_MODE_NAME, "false", (k, v) => "false");
}
}
}
catch (Exception ex)
{
_logger.Error(ex, "[NA] failed to read failover switch.");
}
_switchRefresher.Change(SWITCH_REFRESHER_PERIOD, Timeout.Infinite);
}, null, SWITCH_REFRESHER_DUETIME, Timeout.Infinite);
}