private void InitializePool(string readClientHostName, string writeClientHostName)
{
if (!ReadWritePool.IsPoolReady(Pools.Neo4j))
{
GraphPoolableClient reader = new GraphPoolableClient(readClientHostName);
GraphPoolableClient writer = new GraphPoolableClient(writeClientHostName);
ReadWritePool.AddReadHosts(Pools.Neo4j, new[] { reader });
ReadWritePool.AddWriteHosts(Pools.Neo4j, new[] { writer });
}
}
protected override bool StartCore()
{
if (Pool == null)
{
Pool = CreatePool();
Pool.Parent = this;
}
Capturer.CaptureSuccessed += Capturer_CaptureSuccessed;
return(DecodeLooper.Start());
}
/// <summary>
/// 创建图像缓冲池
/// </summary>
protected override ReadWritePool <Bitmap> CreatePool()
{
Debug.Assert(Region.Width > 0);
Debug.Assert(Region.Height > 0);
var pool = new ReadWritePool <Bitmap>("采集图像缓冲池");
for (var i = 1; i < 5; i++)
{
var bitmap = new Bitmap(i + "号缓冲位图", Region.Width, Region.Height, PixelFormat);
pool.Add(bitmap);
}
return(pool);
}
private GraphPoolableClient GetWriterClient()
{
IPoolable host;
if (ReadWritePool.TryGetWriteHost(Pools.Neo4j, out host))
{
return((GraphPoolableClient)host);
}
// No host found
Logger.Current.Error("Neo4jContext.GetWriterClient", "No writer host found in neo4j pool");
// monitoring, for now it is made with StopWatch because there is no other possibilities
IStopwatch sw = MonitoringTimers.Current.GetNewStopwatch(true);
sw.Stop();
MonitoringTimers.Current.AddTime(Counters.Neo4j_Pool_GetWriterClientErrors, sw);
throw new Exception("No writer host found in neo4j pool");
}
private void InformAboutHostProblems(IPoolable host, Exception ex)
{
if (host != null)
{
if (ex is WebException)
{
WebException webEx = ex as WebException;
if (webEx.Status == WebExceptionStatus.ConnectFailure ||
webEx.Status == WebExceptionStatus.ServerProtocolViolation ||
webEx.Status == WebExceptionStatus.NameResolutionFailure ||
webEx.Status == WebExceptionStatus.Timeout)
{
ReadWritePool.SetHostUnavailable(Pools.Neo4j, host);
Logger.Current.Error("Neo4jContext.InformAboutHostProblems", "Host Unavailable", host.ServiceHost);
}
else
{
// do nothing, for future we can add logic of "dirty" hosts
}
}
}
}
