/**
* Send all fragments as separate messages (with same ID !). Example:
*
* <pre>
* Given the generated ID is 2344, number of fragments=3, message {dst,src,buf}
* would be fragmented into:
* <p/>
* [2344,3,0]{dst,src,buf1},
* [2344,3,1]{dst,src,buf2} and
* [2344,3,2]{dst,src,buf3}
* </pre>
*/
private void fragment(Message msg, long size) {
Address dest = msg.getDest(), src = msg.getSrc();
long frag_id = curr_id.getAndIncrement(); // used as seqnos
int num_frags;
try {
// write message into a byte buffer and fragment it
ByteArrayDataOutputStream dos = new ByteArrayDataOutputStream((int) (size + 50));
msg.writeTo(dos);
byte[] buffer = dos.buffer();
byte[][] fragments = Util.fragmentBuffer(buffer, frag_size, dos.position());
num_frags = fragments.length;
num_sent_frags += num_frags;
if (log.isTraceEnabled()) {
StringBuilder sb = new StringBuilder();
sb.append("fragmenting packet to ")
.append(dest != null ? dest.toString() : "<all members>")
.append(" (size=")
.append(buffer.length)
.append(") into ")
.append(num_frags)
.append(" fragment(s) [frag_size=")
.append(frag_size)
.append(']');
log.trace(sb.toString());
}
for (int i = 0; i < num_frags; i++) {
Message frag_msg = new Message(dest, src, fragments[i]);
FragHeader hdr = new FragHeader(frag_id, i, num_frags);
frag_msg.putHeader(this.id, hdr);
Event evt = new Event(Event.MSG, frag_msg);
down_prot.down(evt);
}
} catch (Exception e) {
log.error(Util.getMessage("ExceptionOccurredTryingToFragmentMessage"), e);
}
}
public static void testWriteAndReadStreamableArray() throws Exception {
Message[] msgs = {
new Message(null, "hello world").setFlag(Message.Flag.OOB, Message.Flag.NO_RELIABILITY),
new Message(Util.createRandomAddress("dest"), "bela ban"),
new Message(
Util.createRandomAddress("dest"),
Util.createRandomAddress("src"),
"hello world again")
.setTransientFlag(Message.TransientFlag.DONT_LOOPBACK)
};
ByteArrayDataOutputStream out = new ByteArrayDataOutputStream(256);
Util.write(msgs, out);
ByteArrayDataInputStream in = new ByteArrayDataInputStream(out.buffer(), 0, out.position());
Message[] tmp = Util.read(Message.class, in);
for (int i = 0; i < msgs.length; i++) {
if (msgs[i].dest() == null) assert tmp[i].dest() == null;
else assert (msgs[i].dest().equals(tmp[i].dest()));
assert msgs[i].getLength() == tmp[i].getLength();
assert msgs[i].getObject().equals(tmp[i].getObject());
}
}