fixed issue #726 , 多线程解析binlog DML事件,提升性能

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

@@ -58,7 +58,6 @@ public final class LogContext {
 
     public void reset() {
         formatDescription = FormatDescriptionLogEvent.FORMAT_DESCRIPTION_EVENT_5_x;
-
         mapOfTable.clear();
     }
 }

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

@@ -109,6 +109,8 @@ public final class LogDecoder {
                         /* Decoding binary-log to event */
                         event = decode(buffer, header, context);
                         if (event != null) {
+                            // set logFileName
+                            event.getHeader().setLogFileName(context.getLogPosition().getFileName());
                             event.setSemival(buffer.semival);
                         }
                     } catch (IOException e) {

dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/LogHeader.java

@@ -115,6 +115,11 @@ public final class LogHeader {
      */
     protected long      crc;        // ha_checksum
 
+    /**
+     * binlog fileName
+     */
+    protected String    logFileName;
+
     /* for Start_event_v3 */
     public LogHeader(final int type){
         this.type = type;
@@ -270,6 +275,14 @@ public final class LogHeader {
         return checksumAlg;
     }
 
+    public String getLogFileName() {
+        return logFileName;
+    }
+
+    public void setLogFileName(String logFileName) {
+        this.logFileName = logFileName;
+    }
+
     private void processCheckSum(LogBuffer buffer) {
         if (checksumAlg != LogEvent.BINLOG_CHECKSUM_ALG_OFF && checksumAlg != LogEvent.BINLOG_CHECKSUM_ALG_UNDEF) {
             crc = buffer.getUint32(eventLen - LogEvent.BINLOG_CHECKSUM_LEN);

dbsync/src/main/java/com/taobao/tddl/dbsync/binlog/event/RowsLogEvent.java

@@ -194,7 +194,7 @@ public abstract class RowsLogEvent extends LogEvent {
     }
 
     public final RowsLogBuffer getRowsBuf(String charsetName) {
-        return new RowsLogBuffer(rowsBuf.duplicate(), columnLen, charsetName);
+        return new RowsLogBuffer(rowsBuf, columnLen, charsetName);
     }
 
     public final int getFlags(final int flags) {