mysql semi support and mariadb gtid parse

dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/LogBuffer.java

@@ -20,6 +20,7 @@ public class LogBuffer {
 
     protected int    origin, limit;
     protected int    position;
+    protected int 	 semival;
 
     protected LogBuffer(){
     }

dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/LogDecoder.java

@@ -104,6 +104,9 @@ public final class LogDecoder {
                     try {
                         /* Decoding binary-log to event */
                         event = decode(buffer, header, context);
+                        if(event!=null){
+                        	event.setSemival(buffer.semival);
+                        }
                     } catch (IOException e) {
                         if (logger.isWarnEnabled()) logger.warn("Decoding " + LogEvent.getTypeName(header.getType())
                                                                 + " failed from: " + context.getLogPosition(), e);

dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/LogEvent.java

@@ -359,8 +359,23 @@ public abstract class LogEvent {
     protected static final Log logger = LogFactory.getLog(LogEvent.class);
 
     protected final LogHeader  header;
+    
+    /**
+     * mysql半同步semi标识 0不需要semi ack 给mysql, 1需要semi ack给mysql
+     */
+    protected int semival;
+    
+    
 
-    protected LogEvent(LogHeader header){
+    public int getSemival() {
+		return semival;
+	}
+
+	public void setSemival(int semival) {
+		this.semival = semival;
+	}
+
+	protected LogEvent(LogHeader header){
         this.header = header;
     }
 

dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/mariadb/MariaGtidLogEvent.java

@@ -13,9 +13,35 @@ import com.taobao.tddl.dbsync.binlog.event.LogHeader;
  */
 public class MariaGtidLogEvent extends IgnorableLogEvent {
 
+	private long gtid;
+	
+	/**
+	 * mariadb gtidlog event format
+	 * 
+    uint<8> GTID sequence
+    uint<4> Replication Domain ID
+    uint<1> Flags
+
+	if flag & FL_GROUP_COMMIT_ID
+	
+	    uint<8> commit_id
+	
+	else
+	
+	    uint<6> 0
+
+	 * 
+	 */
+	
     public MariaGtidLogEvent(LogHeader header, LogBuffer buffer, FormatDescriptionLogEvent descriptionEvent){
         super(header, buffer, descriptionEvent);
+        gtid=buffer.getUlong64().longValue();
         // do nothing , just ignore log event
     }
 
+	public long getGtid() {
+		return gtid;
+	}
+
+    
 }