Msg Receiving Through Socket some problem

[rajamca]

<p>
Dear Sir,
Actually I'm Reading Msg from Socket Sent by C++ Program(Server),It will send 2 msgs/sec.the msg format is like is
<br>
[B]
|1118|0074|01|0023 |1234 |MIG|11FTR01|0eT0000023000318|000050|R|sampl eT msg Ref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| ]
[B]
ie., Starting with pipe(|)Total Msg Length ends with |.Based on the total msg length only I'm receiving msg.Actually the program is thread based.The Problem is that some time the receiving msg length is wrong format(it is the part of the msg)
my ErrorLog showing like this.
[ 09:57:34 ] => [ Message is Wrong Format(MSG LEN)=0336A ]
Suggest me what may be the problem whether socket or receiving side(java program),I'm receiving msg without blocking.Receiving part code as follows,

[code]
if(soc != null)
{
BufferedInputStream recdMsg = new BufferedInputStream(soc.getInputStream());
stringbuffer = new StringBuffer();
byte abyte0[] = new byte[5];
int j = 0;
int i;
if((i = recdMsg.read(abyte0, 0, 5)) != -1)
{
String chkNum = new String(abyte0);
stringbuffer.append(new String(abyte0));
int k = MsgExtractor.isNumber((new String(abyte0)).substring(1));
if(k != 1)
{
j = Integer.parseInt((new String(abyte0)).substring(1));
j -= 5;
}
else if (k == 1 || !chkNum.startsWith("|"))
{
sc.ErrorLog("Message is Wrong Format(MSG LEN)="+chkNum, logcode, "A");
}

byte ch[]=new byte[j];
recdMsg.read(ch,0,j);
stringbuffer.append(new String(ch));
}//End of if((i = recdMsg.read(abyte0, 0, 5)) != -1)
}// End of if(naradasoc != null)
else
{
return;
}
naradamsg = stringbuffer.toString();
[code]
Plz help me.,<br>
-Raja.

[Goodz13]

You could try something like:

BufferedInputStream recdMsg = new BufferedInputStream(soc.getInputStream());
stringbuffer = new StringBuffer();

int i = -1;
while((i = recdMsg.read()) != -1)   {
    stringbuffer.append( (char) i);
}

Then parse the StringBuffer for the length of the msg.

ie

int msgLength = Integer.parseInt(stringbuffer.substring(1,4));

That way you'll have the whole message before you do any other processing

[cjard]

plus.. 5 bytes is a bit of a poor buffer size.. even your mouse port has more than that!

[cjard]

also, maybe im thick or something but i see:

int j = 0;
...
j-=5;
...
byte ch[]=new byte[j];

hmmm