SendMessageProcessor原始碼分析

同步處理請求和非同步處理請求。

同步就是呼叫非同步方法返回future.get

@override

public remotingcommand processrequest
(channelhandlercontext ctx,
remotingcommand request)
throws remotingcommandexception 
catch
(interruptedexception
| executionexception e)
return response;
}@override
public
void
asyncprocessrequest
(channelhandlercontext ctx, remotingcommand request, remotingresponsecallback responsecallback)
throws exception 

我們重點看下普通資訊的處理

public completablefuture

asyncprocessrequest
(channelhandlercontext ctx,
remotingcommand request)
throws remotingcommandexception 
mqtracecontext =
buildmsgcontext
(ctx, requestheader)
;this
.executesendmessagehookbefore
(ctx, request, mqtracecontext)
;// 批量訊息
if(requestheader.
isbatch()
)else
}}

如果沒有topic配置符合建立條件則建立 並向nameserver上報負責的topic資訊

remotingcommand轉換成了messageextbrokerinner

呼叫messagestore介面非同步新增訊息。 defaultmessagestore原始碼分析

private completablefuture

asyncsendmessage
(channelhandlercontext ctx, remotingcommand request,
sendmessagecontext mqtracecontext,
sendmessagerequestheader requestheader)
final
byte
body = request.
getbody()
;int queueidint = requestheader.
getqueueid()
; topicconfig topicconfig =
this
.brokercontroller.
gettopicconfigmanager()
.selecttopicconfig
(requestheader.
gettopic()
);if(queueidint <0)
messageextbrokerinner msginner =
newmessageextbrokerinner()
; msginner.
settopic
(requestheader.
gettopic()
);msginner.
setqueueid
(queueidint);if
(!handleretryanddlq
(requestheader, response, request, msginner, topicconfig)
) msginner.
setbody
(body)
; msginner.
setflag
(requestheader.
getflag()
);messageaccessor.
setproperties
(msginner, messagedecoder.
string2messageproperties
(requestheader.
getproperties()
)); msginner.
setpropertiesstring
(requestheader.
getproperties()
);msginner.
setborntimestamp
(requestheader.
getborntimestamp()
);msginner.
setbornhost
(ctx.
channel()
.remoteaddress()
);msginner.
setstorehost
(this
.getstorehost()
);msginner.
setreconsumetimes
(requestheader.
getreconsumetimes()
== null ?
0: requestheader.
getreconsumetimes()
);completablefuture
putmessageresult = null;
maporigprops = messagedecoder.
string2messageproperties
(requestheader.
getproperties()
);string transflag = origprops.
get(messageconst.property_transaction_prepared);if
(transflag != null && boolean.
parseboolean
(transflag)
) putmessageresult =
this
.brokercontroller.
gettransactionalmessageservice()
.asyncpreparemessage
(msginner);}
else
return
handleputmessageresultfuture
(putmessageresult, response, request, msginner, responseheader, mqtracecontext, ctx, queueidint)
;}

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