/// <summary>从指定队列拉取消息</summary>
/// <param name="mq"></param>
/// <param name="offset"></param>
/// <param name="maxNums"></param>
/// <returns></returns>
public PullResult Pull(MessageQueue mq, Int64 offset, Int32 maxNums)
{
var header = new PullMessageRequestHeader
{
ConsumerGroup = Group,
Topic = Topic,
QueueId = mq.QueueId,
QueueOffset = offset,
MaxMsgNums = maxNums,
SysFlag = 6,
};
var dic = header.GetProperties();
var bk = GetBroker(mq.BrokerName);
var rs = bk.Invoke(RequestCode.PULL_MESSAGE, null, dic);
var pr = new PullResult
{
Status = PullStatus.Found,
};
pr.Read(rs.Header.ExtFields);
return(pr);
}
/// <summary>从指定队列拉取消息</summary>
/// <param name="mq"></param>
/// <param name="offset"></param>
/// <param name="maxNums"></param>
/// <param name="msTimeout"></param>
/// <returns></returns>
public PullResult Pull(MessageQueue mq, Int64 offset, Int32 maxNums, Int32 msTimeout = -1)
{
var header = new PullMessageRequestHeader
{
ConsumerGroup = Group,
Topic = Topic,
QueueId = mq.QueueId,
QueueOffset = offset,
MaxMsgNums = maxNums,
SysFlag = 6,
SubVersion = StartTime.ToLong(),
};
if (msTimeout >= 0)
{
header.SuspendTimeoutMillis = msTimeout;
}
var st = _Queues.FirstOrDefault(e => e.Queue == mq);
if (st != null)
{
header.CommitOffset = st.CommitOffset;
}
var dic = header.GetProperties();
var bk = GetBroker(mq.BrokerName);
var rs = bk.Invoke(RequestCode.PULL_MESSAGE, null, dic, true);
if (rs?.Header == null)
{
return(null);
}
var pr = new PullResult();
if (rs.Header.Code == 0)
{
pr.Status = PullStatus.Found;
}
else if (rs.Header.Code == (Int32)ResponseCode.PULL_NOT_FOUND)
{
pr.Status = PullStatus.NoNewMessage;
}
else if (rs.Header.Code == (Int32)ResponseCode.PULL_OFFSET_MOVED)
{
pr.Status = PullStatus.OffsetIllegal;
}
pr.Read(rs.Header?.ExtFields);
// 读取内容
if (rs.Body != null && rs.Body.Length > 0)
{
pr.Messages = MessageExt.ReadAll(rs.Body).ToArray();
}
return(pr);
}
/// <summary>从指定队列拉取消息</summary>
/// <param name="mq"></param>
/// <param name="offset"></param>
/// <param name="maxNums"></param>
/// <param name="msTimeout"></param>
/// <returns></returns>
public PullResult Pull(MessageQueue mq, Int64 offset, Int32 maxNums, Int32 msTimeout = -1)
{
// 性能埋点
using var span = Tracer?.NewSpan($"mq:{Topic}:Consume");
try
{
var header = new PullMessageRequestHeader
{
ConsumerGroup = Group,
Topic = Topic,
QueueId = mq.QueueId,
QueueOffset = offset,
MaxMsgNums = maxNums,
SysFlag = 6,
SubVersion = StartTime.ToLong(),
};
if (msTimeout >= 0)
{
header.SuspendTimeoutMillis = msTimeout;
}
var st = _Queues.FirstOrDefault(e => e.Queue == mq);
if (st != null)
{
header.CommitOffset = st.CommitOffset;
}
var dic = header.GetProperties();
var bk = GetBroker(mq.BrokerName);
var rs = bk.Invoke(RequestCode.PULL_MESSAGE, null, dic, true);
if (rs?.Header == null)
{
return(null);
}
var pr = new PullResult();
if (rs.Header.Code == 0)
{
pr.Status = PullStatus.Found;
}
else if (rs.Header.Code == (Int32)ResponseCode.PULL_NOT_FOUND)
{
pr.Status = PullStatus.NoNewMessage;
}
else if (rs.Header.Code == (Int32)ResponseCode.PULL_OFFSET_MOVED || rs.Header.Code == (Int32)ResponseCode.PULL_RETRY_IMMEDIATELY)
{
pr.Status = PullStatus.OffsetIllegal;
}
else
{
pr.Status = PullStatus.Unknown;
Log.Warn("响应编号：{0} 响应备注：{1} 序列编号：{2} 序列偏移量：{3}", rs.Header.Code, rs.Header.Remark, mq.QueueId, offset);
}
pr.Read(rs.Header?.ExtFields);
// 读取内容
var pk = rs.Payload;
if (pk != null)
{
pr.Messages = MessageExt.ReadAll(pk).ToArray();
}
return(pr);
}
catch (Exception ex)
{
span?.SetError(ex, mq);
throw;
}
}
