MSF4J POST method receiving partial data - rest

Question

I'm new to MSF4J and I need to write a REST API that accepts a large XML data through POST. I am using
request.getMessegeBody()
method to get the data. I discovered that it's now deprecated but I couldn't find the newer version of it so I decided to use it anyway.
The problem is, when I send data to the microservice for the first time, it doesn't get the whole data. All the subsequent requests will get the full message body except the first.
When I try passing the request through ESB, ESB receives the whole body but when it reaches the endpoint it will be truncated.
I have also tried sending requests from different rest clients but for the first time it always gets the incomplete message body
#POST
#Consumes({ "application/xml", "application/json", "text/xml" })
#Path("test/")
public Response getReqNotification(#Context Request request) throws Exception {
Response.ResponseBuilder respBuilder =
Response.status(Response.Status.OK).entity(request);
ByteBuf b = request.getMessageBody();
byte[] bb = new byte[b.readableBytes()];
b.duplicate().readBytes(bb);
System.out.println(new String(bb));
return respBuilder.build();
}
I expect it to print the full message(which is about 2000 bytes long) every time when I send a request, but I'm only getting around 800 bytes when I first run the microservice.
I hope ill get assistance here. I have tried elsewhere but wso2 doesn't have much documentation (⌣_⌣”)

Answer 1

I still don't really understand what I was doing wrong but with the help of this link I have managed to come up with the following code and it works fine.
The major cha is that I now use request.getMessageContentStream() instead of the depricated request.getMessageBody()
#Consumes({ "application/xml", "application/json", "text/xml" })
#Path("test/")
public Response getReqNotification(#Context Request request) throws Exception {
Response.ResponseBuilder respBuilder =
Response.status(Response.Status.OK).entity(request);
String data = "";
BufferedInputStream bis = new BufferedInputStream(request.getMessageContentStream());
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
int d;
while ((d = bis.read()) != -1) {
bos.write(d);
}
data = bos.toString();
} catch (IOException ex) {
ex.printStackTrace();
} finally {
try {
bos.close();
} catch (IOException e) {
}
}
System.out.println(data);
//////do stuff
return respBuilder.build();
}