/** 用广播方式发送一条消息 */
public void send(String topic, byte[] infobuf)
throws
UDPBaseException { // System.out.println ("Sending-----["+topic+"]["+infobuf.length+"]") ;
// log.log("Sending-----["+topic+"]["+infobuf.length+"]") ;
if (bInitNull) {
return;
}
if (DEBUG) {
log("UdpBase Sending--->>[" + topic + "][" + infobuf.length + "]");
}
if (topic.length() > 150) {
throw new UDPBaseException("Topic is too long!!");
}
if (infobuf == null || infobuf.length == 0) {
throw new UDPBaseException("Info to be send cannot null!");
}
try {
String tmpid = getOneID();
// System.out.println ("ONE ID="+tmpid) ;
int bs = infobuf.length / MAX_PACKET_LENGTH;
int sy = infobuf.length % MAX_PACKET_LENGTH;
int pknum = bs + (sy == 0 ? 0 : 1);
DatagramPacket packet = null;
HeaderItem topicHeader = new HeaderItem(topic);
HeaderItem idHeader = new HeaderItem(tmpid);
byte[] tmpb = null;
for (int i = 0; i < bs; i++) {
// if (i>0)//循环发送信息每次发送间加间隔，以提高发送成功率
Thread.sleep(LOOP_SEND_INTERVAL);
// 增加顺序头
HeaderItem orderHeader = new HeaderItem("" + pknum + "_" + i);
tmpb =
HeaderItem.appendHeaderItem(
infobuf, i * MAX_PACKET_LENGTH, MAX_PACKET_LENGTH, orderHeader);
// 增加唯一id
tmpb = HeaderItem.appendHeaderItem(tmpb, idHeader);
// 增加主题头
tmpb = HeaderItem.appendHeaderItem(tmpb, topicHeader);
packet = new DatagramPacket(tmpb, 0, tmpb.length, group, RECV_PORT);
// System.out.println("send package");
sendSocket.send(packet);
}
if (sy > 0) {
Thread.sleep(LOOP_SEND_INTERVAL);
// 增加顺序头
HeaderItem orderHeader = new HeaderItem("" + pknum + "_" + bs);
tmpb = HeaderItem.appendHeaderItem(infobuf, bs * MAX_PACKET_LENGTH, sy, orderHeader);
// 增加唯一id
tmpb = HeaderItem.appendHeaderItem(tmpb, idHeader);
// 增加主题头
tmpb = HeaderItem.appendHeaderItem(tmpb, topicHeader);
packet = new DatagramPacket(tmpb, 0, tmpb.length, group, RECV_PORT);
// System.out.println("send.."+new String(tmpb));
sendSocket.send(packet);
}
} catch (Exception e) {
e.printStackTrace();
throw new UDPBaseException("UDPBase send() error=\n" + e.toString());
}
}
