/** 客户端使用，SLAVE也会使用 */
public static MessageExt decode(java.nio.ByteBuffer byteBuffer, final boolean readBody) {
try {
MessageExt msgExt = new MessageExt();
// 1 TOTALSIZE
int storeSize = byteBuffer.getInt();
msgExt.setStoreSize(storeSize);
// 2 MAGICCODE
byteBuffer.getInt();
// 3 BODYCRC
int bodyCRC = byteBuffer.getInt();
msgExt.setBodyCRC(bodyCRC);
// 4 QUEUEID
int queueId = byteBuffer.getInt();
msgExt.setQueueId(queueId);
// 5 FLAG
int flag = byteBuffer.getInt();
msgExt.setFlag(flag);
// 6 QUEUEOFFSET
long queueOffset = byteBuffer.getLong();
msgExt.setQueueOffset(queueOffset);
// 7 PHYSICALOFFSET
long physicOffset = byteBuffer.getLong();
msgExt.setCommitLogOffset(physicOffset);
// 8 SYSFLAG
int sysFlag = byteBuffer.getInt();
msgExt.setSysFlag(sysFlag);
// 9 BORNTIMESTAMP
long bornTimeStamp = byteBuffer.getLong();
msgExt.setBornTimestamp(bornTimeStamp);
// 10 BORNHOST
byte[] bornHost = new byte[4];
byteBuffer.get(bornHost, 0, 4);
int port = byteBuffer.getInt();
msgExt.setBornHost(new InetSocketAddress(InetAddress.getByAddress(bornHost), port));
// 11 STORETIMESTAMP
long storeTimestamp = byteBuffer.getLong();
msgExt.setStoreTimestamp(storeTimestamp);
// 12 STOREHOST
byte[] storeHost = new byte[4];
byteBuffer.get(storeHost, 0, 4);
port = byteBuffer.getInt();
msgExt.setStoreHost(new InetSocketAddress(InetAddress.getByAddress(storeHost), port));
// 13 RECONSUMETIMES
int reconsumeTimes = byteBuffer.getInt();
msgExt.setReconsumeTimes(reconsumeTimes);
// 14 Prepared Transaction Offset
long preparedTransactionOffset = byteBuffer.getLong();
msgExt.setPreparedTransactionOffset(preparedTransactionOffset);
// 15 BODY
int bodyLen = byteBuffer.getInt();
if (bodyLen > 0) {
if (readBody) {
byte[] body = new byte[bodyLen];
byteBuffer.get(body);
// uncompress body
if ((sysFlag & MessageSysFlag.CompressedFlag) == MessageSysFlag.CompressedFlag) {
body = UtilAll.uncompress(body);
}
msgExt.setBody(body);
} else {
byteBuffer.position(byteBuffer.position() + bodyLen);
}
}
// 16 TOPIC
byte topicLen = byteBuffer.get();
byte[] topic = new byte[(int) topicLen];
byteBuffer.get(topic);
msgExt.setTopic(new String(topic));
// 17 properties
short propertiesLength = byteBuffer.getShort();
if (propertiesLength > 0) {
byte[] properties = new byte[propertiesLength];
byteBuffer.get(properties);
String propertiesString = new String(properties);
Map<String, String> map = string2messageProperties(propertiesString);
msgExt.setProperties(map);
}
// 消息ID
ByteBuffer byteBufferMsgId = ByteBuffer.allocate(MSG_ID_LENGTH);
String msgId =
createMessageId(byteBufferMsgId, msgExt.getStoreHostBytes(), msgExt.getCommitLogOffset());
msgExt.setMsgId(msgId);
return msgExt;
} catch (UnknownHostException e) {
byteBuffer.position(byteBuffer.limit());
} catch (BufferUnderflowException e) {
byteBuffer.position(byteBuffer.limit());
} catch (Exception e) {
byteBuffer.position(byteBuffer.limit());
}
return null;
}
