[PROTOBUF] Fix protobuf generation on handling repeated long number … (…

…apache#7540)

*Motivation*

The code generation for `repeated long` is not handled properly. (I am not sure how changes were made to PulsarApi.proto)

*Modification*

This pull request adds the code to handle generating code for `repeated long`.

*Test*

Add unit test to ensure `repeated long` is processed. Add test cases to cover both packed and non-package serialization for `repeated long`.

See more details about packed serialization: https://developers.google.com/protocol-buffers/docs/encoding#optional

pom.xml

@@ -1268,6 +1268,7 @@ flexible messaging model and an intuitive client API.</description>
             <exclude>src/main/java/org/apache/bookkeeper/mledger/proto/MLDataFormats.java</exclude>
             <exclude>src/main/java/org/apache/pulsar/broker/service/schema/proto/SchemaRegistryFormat.java</exclude>
             <exclude>src/main/java/org/apache/pulsar/common/api/proto/*.java</exclude>
+            <exclude>src/test/java/org/apache/pulsar/common/api/proto/*.java</exclude>
             <exclude>src/main/java/org/apache/pulsar/io/kinesis/fbs/CompressionType.java</exclude>
             <exclude>src/main/java/org/apache/pulsar/io/kinesis/fbs/EncryptionCtx.java</exclude>
             <exclude>src/main/java/org/apache/pulsar/io/kinesis/fbs/EncryptionKey.java</exclude>
@@ -1343,6 +1344,7 @@ flexible messaging model and an intuitive client API.</description>
                  and are included in source tree for convenience -->
             <exclude>src/main/java/org/apache/bookkeeper/mledger/proto/MLDataFormats.java</exclude>
             <exclude>src/main/java/org/apache/pulsar/common/api/proto/PulsarApi.java</exclude>
+            <exclude>src/test/java/org/apache/pulsar/common/api/proto/TestApi.java</exclude>
             <exclude>src/main/java/org/apache/pulsar/common/api/proto/PulsarMarkers.java</exclude>
             <exclude>src/main/java/org/apache/pulsar/broker/service/schema/proto/SchemaRegistryFormat.java</exclude>
             <exclude>bin/proto/MLDataFormats_pb2.py</exclude>

pulsar-common/src/main/java/org/apache/pulsar/common/util/protobuf/ByteBufCodedInputStream.java

@@ -346,4 +346,34 @@ public void skipRawBytes(final int size) throws IOException {
 
         buf.readerIndex(buf.readerIndex() + size);
     }
+
+    public int pushLimit(int byteLimit) throws InvalidProtocolBufferException {
+        if (byteLimit < 0) {
+            throw new InvalidProtocolBufferException("CodedInputStream encountered an embedded string or message"
+                + " which claimed to have negative size.");
+        }
+
+        byteLimit += buf.readerIndex();
+        final int oldLimit = buf.writerIndex();
+        if (byteLimit > oldLimit) {
+            throw new InvalidProtocolBufferException("While parsing a protocol message, the input ended unexpectedly"
+                + " in the middle of a field.  This could mean either than the input has been truncated or that an"
+                + " embedded message misreported its own length.");
+        }
+        buf.writerIndex(byteLimit);
+        return oldLimit;
+    }
+
+    /**
+     * Discards the current limit, returning to the previous limit.
+     *
+     * @param oldLimit The old limit, as returned by {@code pushLimit}.
+     */
+    public void popLimit(final int oldLimit) {
+        buf.writerIndex(oldLimit);
+    }
+
+    public int getBytesUntilLimit() {
+        return buf.readableBytes();
+    }
 }