[GitHub] [pinot] KKcorps commented on a diff in pull request #10030: pinot-protobuf plugin generate descriptor using protobuf message java class name

[GitBox]

KKcorps commented on code in PR #10030:
URL: https://github.com/apache/pinot/pull/10030#discussion_r1065352035


##########
pinot-plugins/pinot-input-format/pinot-protobuf/src/main/java/org/apache/pinot/plugin/inputformat/protobuf/ProtoBufUtils.java:
##########
@@ -65,4 +75,114 @@ public static File createLocalFile(URI srcURI, File dstDir) 
{
         + "buffer descriptor {}", dstFile.getAbsolutePath(), srcURI);
     return dstFile;
   }
+
+  public static Descriptors.Descriptor buildDescriptor(String messageName, 
String descFilePathOpt) {
+    if (descFilePathOpt != null && !descFilePathOpt.isEmpty()) {
+      return getDescriptor(descFilePathOpt, messageName);
+    } else {
+      return buildDescriptorFromJavaClass(messageName);
+    }
+  }
+
+  /**
+   *  Loads the given protobuf class and returns Protobuf descriptor for it.
+   */
+  private static Descriptors.Descriptor buildDescriptorFromJavaClass(String 
protobufClassName) {
+    Class<?> protobufClass;
+    try {
+      protobufClass = Class.forName(protobufClassName);

Review Comment:
   How is the user expected to upload class? e.g. if 30 pinot servers are 
running, users should copy their jar to all of them and then restart?



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