/** 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;
}
private ByteBuffer messageToByteBuffer(final MessageExt msg) throws IOException {
int sysFlag = MessageSysFlag.clearCompressedFlag(msg.getSysFlag());
if (msg.getBody() != null) {
if (msg.getBody().length
>= this.filtersrvController.getFiltersrvConfig().getCompressMsgBodyOverHowmuch()) {
byte[] data =
UtilAll.compress(
msg.getBody(), this.filtersrvController.getFiltersrvConfig().getZipCompressLevel());
if (data != null) {
msg.setBody(data);
sysFlag |= MessageSysFlag.CompressedFlag;
}
}
}
final int bodyLength = msg.getBody() != null ? msg.getBody().length : 0;
byte[] topicData = msg.getTopic().getBytes(MixAll.DEFAULT_CHARSET);
final int topicLength = topicData.length;
String properties = MessageDecoder.messageProperties2String(msg.getProperties());
byte[] propertiesData = properties.getBytes(MixAll.DEFAULT_CHARSET);
final int propertiesLength = propertiesData.length;
final int msgLen =
4 // 1 TOTALSIZE
+ 4 // 2 MAGICCODE
+ 4 // 3 BODYCRC
+ 4 // 4 QUEUEID
+ 4 // 5 FLAG
+ 8 // 6 QUEUEOFFSET
+ 8 // 7 PHYSICALOFFSET
+ 4 // 8 SYSFLAG
+ 8 // 9 BORNTIMESTAMP
+ 8 // 10 BORNHOST
+ 8 // 11 STORETIMESTAMP
+ 8 // 12 STOREHOSTADDRESS
+ 4 // 13 RECONSUMETIMES
+ 8 // 14 Prepared Transaction Offset
+ 4
+ bodyLength // 14 BODY
+ 1
+ topicLength // 15 TOPIC
+ 2
+ propertiesLength // 16 propertiesLength
+ 0;
ByteBuffer msgStoreItemMemory = ByteBuffer.allocate(msgLen);
final MessageExt msgInner = msg;
// 1 TOTALSIZE
msgStoreItemMemory.putInt(msgLen);
// 2 MAGICCODE
msgStoreItemMemory.putInt(CommitLog.MessageMagicCode);
// 3 BODYCRC
msgStoreItemMemory.putInt(UtilAll.crc32(msgInner.getBody()));
// 4 QUEUEID
msgStoreItemMemory.putInt(msgInner.getQueueId());
// 5 FLAG
msgStoreItemMemory.putInt(msgInner.getFlag());
// 6 QUEUEOFFSET
msgStoreItemMemory.putLong(msgInner.getQueueOffset());
// 7 PHYSICALOFFSET
msgStoreItemMemory.putLong(msgInner.getCommitLogOffset());
// 8 SYSFLAG
msgStoreItemMemory.putInt(sysFlag);
// 9 BORNTIMESTAMP
msgStoreItemMemory.putLong(msgInner.getBornTimestamp());
// 10 BORNHOST
msgStoreItemMemory.put(msgInner.getBornHostBytes());
// 11 STORETIMESTAMP
msgStoreItemMemory.putLong(msgInner.getStoreTimestamp());
// 12 STOREHOSTADDRESS
msgStoreItemMemory.put(msgInner.getStoreHostBytes());
// 13 RECONSUMETIMES
msgStoreItemMemory.putInt(msgInner.getReconsumeTimes());
// 14 Prepared Transaction Offset
msgStoreItemMemory.putLong(msgInner.getPreparedTransactionOffset());
// 15 BODY
msgStoreItemMemory.putInt(bodyLength);
if (bodyLength > 0) msgStoreItemMemory.put(msgInner.getBody());
// 16 TOPIC
msgStoreItemMemory.put((byte) topicLength);
msgStoreItemMemory.put(topicData);
// 17 PROPERTIES
msgStoreItemMemory.putShort((short) propertiesLength);
if (propertiesLength > 0) msgStoreItemMemory.put(propertiesData);
return msgStoreItemMemory;
}
