/** 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; }