On Thursday 27 August 2009 17:42:56 Michael Yip wrote:
> That's enough to read and terminate reading of one message. However, how
> do I know when is the last message so I can stop reading from the stream?
>
> For example, a PersistentPut message came in..so I parse until
> EndMesssage line. However, there could be yet more PersistentPut/Get
> messages. Therefore, I'm just wondering how do I break out of the loop
> after the last of these messages.
There is no end to messages! :) You can make any number of requests over a
single connection, one after another or simultaneously.
You submit a request or insert, with a specific Identifier. Then you wait for
the terminal messages for that request or insert, which will include its
Identifier. So for a request, that would typically be GetFailed or DataFound +
AllData. For a persistent request (persistence != connection), you'll just get
the DataFound and you have to do GetRequestStatus to get the data, and then
RemoveRequest to delete the request. For a persistent insert, you're looking
for PutSuccessful or PutFailed. In all cases IdentifierCollision is possible if
there is already a request with the same Identifier, or ProtocolError if you
have a bug, a file is not readable etc.
>
> Matthew Toseland wrote:
> > On Thursday 27 August 2009 16:50:48 Michael Yip wrote:
> >
> >> Hi Matt,
> >>
> >> Problem is that (line = buffIns.readLine()) == null does not terminate
> >> the loop. Since most messages ends with EndMessage, how do I know how
> >> many more to read before I break the loop??
> >>
> >
> > A message ends with "EndMessage" or "Data", or something on a line with no
> > = in it. All lines within a message include an "=". The first line, the
> > message type, doesn't include an "=". That should be enough information to
> > separate and parse messages, no?
> >
> >> Thanks,
> >>
> >> Michael
> >>
> >> Matthew Toseland wrote:
> >>
> >>> On Thursday 27 August 2009 13:00:41 bbackde at googlemail.com wrote:
> >>>
> >>>
> >>>> You should process the messages in a Thread. Put your code into a Thread
> >>>> that calls handler methods when a specific message arrived.
> >>>> The Thread runs forever and receives all messages and all data...
> >>>>
> >>>>
> >>> All you need to do is parse each message. The type of the message is the
> >>> first line, it ends at the last line, unless it has trailing data. You
> >>> can do this level of parsing without understanding the message. Then you
> >>> can ignore it if you don't understand it, or you can handle it
> >>> appropriately.
> >>>
> >>>
> >>>> On Thu, Aug 27, 2009 at 03:22, Michael Yip<mhy831 at cs.bham.ac.uk>
> >>>> wrote:
> >>>>
> >>>>
> >>>>> Hi guys,
> >>>>>
> >>>>> Does anyone know how to know when I've read all the PersistentPut and
> >>>>> PersistentGet messages at the start? There's no way of knowing how many
> >>>>> there are and I have no idea how to know when to stop reading? Below is
> >>>>> the code I've written:
> >>>>>
> >>>>> String line;
> >>>>> while((line = buffIns.readLine()) != null){
> >>>>> System.out.println(line);
> >>>>> _Logger.log(line);
> >>>>> //Capture ConnectionIdentifer to be used as salt for file
> >>>>> insertions
> >>>>> if(line.contains("ConnectionIdentifier")){
> >>>>> helloID = line.substring(line.indexOf('=') + 1,
> >>>>> line.length());
> >>>>> }
> >>>>> if(line.equals("EndMessage")){
> >>>>> //Read an extra line to see if there are more to read
> >>>>> //Read all persistent puts and gets
> >>>>> line = buffIns.readLine();
> >>>>> if(line.contains("Get") || line.contains("Put") ||
> >>>>> line.contains("URI") ||line.contains("Get") || line.contains("Data")
> >>>>> ||line.contains("Started") || line.contains("Finished")||
> >>>>> line.contains("Simple")){
> >>>>> System.out.println(line);
> >>>>> _Logger.log(line);
> >>>>> }else{
> >>>>> return true;
> >>>>> }
> >>>>> }
> >>>>> }
> >>>>>
> >>>>> but obviously the reader doesn't know when to stop and so line is never
> >>>>> null?
> >>>>>
> >>>>> Thanks,
> >>>>>
> >>>>> Michael
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