fix parseRecord (#50)

* fix parseRecord

* set checkpoint after put successfully

logproxy-client/src/main/java/com/oceanbase/clogproxy/client/connection/ClientHandler.java

@@ -309,25 +309,23 @@ public class ClientHandler extends ChannelInboundHandlerAdapter {
         int offset = 0;
         while (offset < bytes.length) {
             int dataLength = Conversion.byteArrayToInt(bytes, offset + 4, 0, 0, 4);
-            LogMessage logMessage;
-            try {
             /*
              * We must copy a byte array and call parse after then,
              * or got a !!!RIDICULOUS EXCEPTION!!!,
              * if we wrap an unpooled buffer with offset and call setByteBuf just as same as `parse` function do.
              */
-                logMessage = new LogMessage(false);
+            LogMessage logMessage = new LogMessage(false);
             byte[] data = new byte[dataLength + 8];
             System.arraycopy(bytes, offset, data, 0, data.length);
+            try {
                 logMessage.parse(data);
+            } catch (Exception e) {
                 if (config.isIgnoreUnknownRecordType()) {
                     // unsupported type, ignore
                     logger.debug("Unsupported record type: {}", logMessage);
                     offset += (8 + dataLength);
                     continue;
                 }
-
-            } catch (Exception e) {
                 throw new LogProxyClientException(ErrorCode.E_PARSE, e);
             }
 
@@ -338,14 +336,17 @@ public class ClientHandler extends ChannelInboundHandlerAdapter {
             while (true) {
                 try {
                     recordQueue.put(new StreamContext.TransferPacket(logMessage));
-                    stream.setCheckpointString(logMessage.getSafeTimestamp());
                     break;
                 } catch (InterruptedException e) {
                     // do nothing
+                }
+            }
+
+            try {
+                stream.setCheckpointString(logMessage.getSafeTimestamp());
             } catch (IllegalArgumentException e) {
                 logger.error("Failed to update checkpoint for log message: " + logMessage, e);
             }
-            }
 
             offset += (8 + dataLength);
         }

logproxy-client/src/main/java/com/oceanbase/clogproxy/client/connection/ClientStream.java

@@ -297,7 +297,7 @@ public class ClientStream {
      */
     public void setCheckpointString(String checkpointString) {
         long timestamp = Long.parseLong(checkpointString);
-        if (timestamp < 0) {
+        if (timestamp <= 0) {
             throw new IllegalArgumentException(
                     "Update checkpoint with invalid value: " + timestamp);
         }