yihua commented on code in PR #10687:
URL: https://github.com/apache/hudi/pull/10687#discussion_r1495114452


##########
hudi-utilities/src/main/java/org/apache/hudi/utilities/streamer/StreamProfile.java:
##########
@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.hudi.utilities.streamer;
+
+/**
+ * A profile containing details about how the next input batch in StreamSync 
should be consumed and written.
+ * For eg: KafkaStreamProfile contains number of events to consume in this 
sync round.
+ * S3StreamProfile contains the list of files to consume in this sync round.
+ * HudiIncrementalStreamProfile contains the beginInstant and endInstant 
commit times to consume in this sync round etc.
+ *
+ * @param <T> The type for source context, varies based on sourceType as 
described above.
+ */
+public interface StreamProfile<T> {

Review Comment:
   Add annotation for public interface: `@PublicAPIClass(maturity = 
ApiMaturityLevel.EVOLVING)`



##########
hudi-utilities/src/main/java/org/apache/hudi/utilities/streamer/StreamProfile.java:
##########
@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.hudi.utilities.streamer;
+
+/**
+ * A profile containing details about how the next input batch in StreamSync 
should be consumed and written.
+ * For eg: KafkaStreamProfile contains number of events to consume in this 
sync round.
+ * S3StreamProfile contains the list of files to consume in this sync round.
+ * HudiIncrementalStreamProfile contains the beginInstant and endInstant 
commit times to consume in this sync round etc.
+ *
+ * @param <T> The type for source context, varies based on sourceType as 
described above.
+ */
+public interface StreamProfile<T> {
+
+  /**
+   * @return The maxBytes that will be consumed from the source in this sync 
round.
+   */
+  long getMaxSourceBytes();

Review Comment:
   same for methods: `@PublicAPIMethod(maturity = ApiMaturityLevel. EVOLVING)`



##########
hudi-utilities/src/main/java/org/apache/hudi/utilities/sources/Source.java:
##########
@@ -55,11 +57,17 @@ protected Source(TypedProperties props, JavaSparkContext 
sparkContext, SparkSess
 
   protected Source(TypedProperties props, JavaSparkContext sparkContext, 
SparkSession sparkSession,
       SchemaProvider schemaProvider, SourceType sourceType) {
+    this(props, sparkContext, sparkSession, schemaProvider, sourceType, 
Option.empty());
+  }
+
+  protected Source(TypedProperties props, JavaSparkContext sparkContext, 
SparkSession sparkSession,
+                   SchemaProvider schemaProvider, SourceType sourceType, 
Option<StreamProfileSupplier> streamProfilerSupplier) {

Review Comment:
   Maybe it's better to have an interface class `StreamContext` wrapping all 
`SchemaProvider schemaProvider, SourceType sourceType, 
Option<StreamProfileSupplier> streamProfilerSupplier` so it's flexible to 
extend the context without changing the constructor once more?



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