// 发送心跳消息给 dp2mserver
/*
* <root>
* <type>patronNotify</type>
* <recipient>R0000001@LUID:62637a12-1965-4876-af3a-fc1d3009af8a</recipient>
* <mime>xml</mime>
* <body>...</body>
* </root>
*
* */
public bool SendHeartBeat()
{
if (this.MessageConnection == null || this.MessageConnection.ConnectState != Microsoft.AspNet.SignalR.Client.ConnectionState.Connected)
{
return(false);
}
try
{
XmlDocument dom = new XmlDocument();
dom.LoadXml("<root><type>heartbeat</type></root>");
MessageRecord record = new MessageRecord();
record.groups = new string[1] {
"gn:_patronNotify"
}; // gn 表示 group name
record.data = dom.DocumentElement.OuterXml;
record.format = "xml";
List <MessageRecord> records = new List <MessageRecord> {
record
};
DigitalPlatform.Message.SetMessageRequest param =
new DigitalPlatform.Message.SetMessageRequest("create",
"dontNotifyMe",
records);
SetMessageResult result = this.MessageConnection.SetMessageTaskAsync(param,
_cancel.Token).Result;
if (result.Value == -1)
{
this.WriteErrorLog("Instance.SendHeartBeat() 中 SetMessageAsync() [heartbeat] 出错: " + result.ErrorInfo);
if (result.String == "_connectionNotFound")
{
Task.Run(() => TryResetConnection(/*result.String*/));
}
return(false);
}
return(true);
}
catch (ThreadAbortException)
{
return(false);
}
catch (Exception ex)
{
this.WriteErrorLog("Instance.SendHeartBeat() 出现异常: " + ExceptionUtil.GetDebugText(ex));
return(false);
}
}
public void Notify()
{
// TODO: 要增加判断，防止过分频繁地被调用
this.MessageConnection.CleanWebDataTable();
if (this.dp2library.DefaultQueue == "!api")
{
try
{
if (this.MessageConnection.ConnectState != Microsoft.AspNet.SignalR.Client.ConnectionState.Connected)
{
return;
}
MessageData[] messages = null;
string strError = "";
int nRet = this.MessageConnection.GetMsmqMessage(
out messages,
out strError);
if (nRet == -1)
{
this.WriteErrorLog("Instance.Notify() 中 GetMsmqMessage() 出错: " + strError);
return;
}
if (messages != null)
{
foreach (MessageData data in messages)
{
MessageRecord record = new MessageRecord();
record.groups = new string[1] {
"gn:_patronNotify"
}; // gn 表示 group name
record.data = (string)data.strBody;
record.format = "xml";
List <MessageRecord> records = new List <MessageRecord> {
record
};
DigitalPlatform.Message.SetMessageRequest param =
new DigitalPlatform.Message.SetMessageRequest("create",
"dontNotifyMe",
records);
SetMessageResult result = this.MessageConnection.SetMessageTaskAsync(param,
_cancel.Token).Result;
if (result.Value == -1)
{
this.WriteErrorLog("Instance.Notify() 中 SetMessageAsync() 出错: " + result.ErrorInfo);
return;
}
}
nRet = this.MessageConnection.RemoveMsmqMessage(
messages.Length,
out strError);
if (nRet == -1)
{
this.WriteErrorLog("Instance.Notify() 中 RemoveMsmqMessage() 出错: " + strError);
return;
}
}
this._notifyThread.Activate();
return;
}
catch (ThreadAbortException)
{
return;
}
catch (Exception ex)
{
this.WriteErrorLog("Instance.Notify() 出现异常1: " + ExceptionUtil.GetDebugText(ex));
}
}
// 如果第一次初始化 Queue 没有成功，这里再试探初始化
InitialQueue(false);
// 进行通知处理
if (_queue != null &&
this.MessageConnection.ConnectState == Microsoft.AspNet.SignalR.Client.ConnectionState.Connected)
{
try
{
ServerInfo._recordLocks.LockForWrite(this._queue.Path);
}
catch (ApplicationException)
{
// 超时了
return;
}
bool bSucceed = false;
try
{
MessageEnumerator iterator = _queue.GetMessageEnumerator2();
while (iterator.MoveNext())
{
Message message = iterator.Current;
MessageRecord record = new MessageRecord();
record.groups = new string[1] {
"gn:_patronNotify"
}; // gn 表示 group name
record.data = (string)message.Body;
record.format = "xml";
List <MessageRecord> records = new List <MessageRecord> {
record
};
int length = record.data.Length;
DigitalPlatform.Message.SetMessageRequest param =
new DigitalPlatform.Message.SetMessageRequest("create",
"dontNotifyMe",
records);
SetMessageResult result = this.MessageConnection.SetMessageTaskAsync(param,
_cancel.Token).Result;
if (result.Value == -1)
{
this.WriteErrorLog("Instance.Notify() 中 SetMessageAsync() 出错: " + result.ErrorInfo);
if (result.String == "_connectionNotFound")
{
Task.Run(() => TryResetConnection(/*result.String*/));
}
return;
}
// http://stackoverflow.com/questions/21864043/with-messageenumerator-removecurrent-how-do-i-know-if-i-am-at-end-of-queue
try
{
iterator.RemoveCurrent();
}
finally
{
iterator.Reset();
}
}
bSucceed = true;
}
catch (ThreadAbortException)
{
return;
}
catch (MessageQueueException ex)
{
// 记入错误日志
// Program.WriteWindowsLog("Instance.Notify() 出现异常: " + ExceptionUtil.GetDebugText(ex));
this.WriteErrorLog("Instance.Notify() 出现异常: " + ExceptionUtil.GetDebugText(ex));
// Thread.Sleep(5 * 1000); // 拖延 5 秒
}
catch (InvalidCastException ex)
{
// 记入错误日志
// Program.WriteWindowsLog("Instance.Notify() 出现异常: " + ExceptionUtil.GetDebugText(ex));
this.WriteErrorLog("Instance.Notify() 出现异常: " + ExceptionUtil.GetDebugText(ex));
// Thread.Sleep(5 * 1000); // 拖延 5 秒
}
catch (Exception ex)
{
// 记入错误日志
// Program.WriteWindowsLog("Instance.Notify() 出现异常: " + ExceptionUtil.GetDebugText(ex));
this.WriteErrorLog("Instance.Notify() 出现异常: " + ExceptionUtil.GetDebugText(ex));
// Thread.Sleep(5 * 1000); // 拖延 5 秒
}
finally
{
ServerInfo._recordLocks.UnlockForWrite(this._queue.Path);
// 只有当发送到 dp2mserver 成功的情况下才立即重新监控最新 MQ
// 否则就等下一轮 Worker() 来处理
if (bSucceed == true)
{
// _queue.BeginPeek(new TimeSpan(0, 1, 0), null, OnMessageAdded);
BeginPeek();
}
}
}
}
