internal async Task HandleNodeDataChange(IZookeeperClient client, NodeDataChangeArgs args)
{
var eventType = args.Type;
byte[] nodeData = null;
if (args.CurrentData != null && args.CurrentData.Any())
{
nodeData = args.CurrentData.ToArray();
}
switch (eventType)
{
case Watcher.Event.EventType.NodeDeleted:
var serviceId = Path.Split("/").Last();
_serviceRouteCache.RemoveCache(serviceId);
break;
case Watcher.Event.EventType.NodeCreated:
Check.NotNullOrEmpty(nodeData, nameof(nodeData));
var createdJsonString = nodeData.GetString();
var createdServiceRouteDescriptor = _serializer.Deserialize <ServiceRouteDescriptor>(createdJsonString);
_serviceRouteCache.UpdateCache(createdServiceRouteDescriptor);
break;
case Watcher.Event.EventType.NodeDataChanged:
Check.NotNullOrEmpty(nodeData, nameof(nodeData));
var updateJsonString = nodeData.GetString();
var updateServiceRouteDescriptor = _serializer.Deserialize <ServiceRouteDescriptor>(updateJsonString);
_serviceRouteCache.UpdateCache(updateServiceRouteDescriptor);
break;
}
}
private async Task OnDataChangeHandle(WatchedEvent watchedEvent)
{
if (!HasDataChangeHandler)
{
return;
}
//获取当前节点最新数据的一个委托
var getCurrentData = new Func <Task <IEnumerable <byte> > >(() => _client.RetryUntilConnected(async() =>
{
try
{
return(await GetDataAsync());
}
catch (KeeperException.NoNodeException) //节点不存在返回null
{
return(null);
}
}));
//根据事件类型构建节点变更事件参数
NodeDataChangeArgs args;
switch (watchedEvent.get_Type())
{
case Watcher.Event.EventType.NodeCreated:
args = new NodeDataChangeArgs(Path, Watcher.Event.EventType.NodeCreated, await getCurrentData());
break;
case Watcher.Event.EventType.NodeDeleted:
args = new NodeDataChangeArgs(Path, Watcher.Event.EventType.NodeDeleted, null);
break;
case Watcher.Event.EventType.NodeDataChanged:
case Watcher.Event.EventType.None: //重连时触发
args = new NodeDataChangeArgs(Path, Watcher.Event.EventType.NodeDataChanged, await getCurrentData());
break;
default:
throw new NotSupportedException($"不支持的事件类型：{watchedEvent.get_Type()}");
}
await _dataChangeHandler(_client, args);
//重新监听
await WatchDataChange();
}
//public void SetCurrentData(byte[] currentData)
//{
// _currentData = currentData;
//}
internal async Task HandleNodeDataChange(IZookeeperClient client, NodeDataChangeArgs args)
{
Watcher.Event.EventType eventType = args.Type;
var nodeData = new byte[0];
if (args.CurrentData != null && args.CurrentData.Any())
{
nodeData = args.CurrentData.ToArray();
}
switch (eventType)
{
case Watcher.Event.EventType.NodeCreated:
_action(new byte[0], nodeData);
_currentData = nodeData;
break;
case Watcher.Event.EventType.NodeDataChanged:
_action(_currentData, nodeData);
_currentData = nodeData;
break;
}
}
private Task OnNodeDataChangeAsync(ZookeeperClient client, NodeDataChangeArgs args)
{
return(this.LoadRemoteConfigurationAsync(client));
}