[ISSUE #375] Replace the message_magic_code and blank_magic_code value

common/src/main/java/org/apache/rocketmq/common/message/MessageDecoder.java

@@ -38,7 +38,7 @@ public class MessageDecoder {
     public final static int MESSAGE_FLAG_POSTION = 16;
     public final static int MESSAGE_PHYSIC_OFFSET_POSTION = 28;
     public final static int MESSAGE_STORE_TIMESTAMP_POSTION = 56;
-    public final static int MESSAGE_MAGIC_CODE = 0xAABBCCDD ^ 1880681586 + 8;
+    public final static int MESSAGE_MAGIC_CODE = -626843481;
     public static final char NAME_VALUE_SEPARATOR = 1;
     public static final char PROPERTY_SEPARATOR = 2;
     public static final int BODY_SIZE_POSITION = 4 // 1 TOTALSIZE

store/src/main/java/org/apache/rocketmq/store/CommitLog.java

@@ -44,10 +44,10 @@ import org.apache.rocketmq.store.schedule.ScheduleMessageService;
  */
 public class CommitLog {
     // Message's MAGIC CODE daa320a7
-    public final static int MESSAGE_MAGIC_CODE = 0xAABBCCDD ^ 1880681586 + 8;
+    public final static int MESSAGE_MAGIC_CODE = -626843481;
     private static final InternalLogger log = InternalLoggerFactory.getLogger(LoggerName.STORE_LOGGER_NAME);
     // End of file empty MAGIC CODE cbd43194
-    private final static int BLANK_MAGIC_CODE = 0xBBCCDDEE ^ 1880681586 + 8;
+    private final static int BLANK_MAGIC_CODE = -875286124;
     private final MappedFileQueue mappedFileQueue;
     private final DefaultMessageStore defaultMessageStore;
     private final FlushCommitLogService flushCommitLogService;