fix(java): initialize netty-shaded at run-time and add reflection configurations for netty classes (#1290)

* fix(java): initialize netty-shaded at run-time and add reflection configurations for netty classes

Author: mpeddada1

gax-java/gax-grpc/src/main/java/com/google/api/gax/grpc/nativeimage/GrpcNettyFeature.java

@@ -85,6 +85,26 @@ private static void loadGrpcNettyClasses(BeforeAnalysisAccess access) {
       registerClassForReflection(access, "io.grpc.netty.shaded.io.netty.channel.DefaultFileRegion");
       registerClassForReflection(
           access, "io.grpc.netty.shaded.io.netty.channel.unix.PeerCredentials");
+      registerClassForReflection(
+          access, "io.grpc.netty.shaded.io.netty.channel.DefaultChannelPipeline");
+      registerClassForReflection(
+          access, "io.grpc.netty.shaded.io.grpc.netty.WriteBufferingAndExceptionHandler");
+      registerClassForReflection(
+          access, "io.grpc.netty.shaded.io.netty.channel.ProtocolNegotiators");
+      registerClassForReflection(access, "io.grpc.netty.shaded.io.netty.handler.ssl.SslHandler");
+      registerClassForReflection(access, "io.grpc.netty.shaded.io.grpc.netty.NettyClientHandler");
+      registerClassForReflection(
+          access, "io.grpc.netty.shaded.io.netty.channel.DefaultChannelPipeline$HeadContext");
+      registerClassForReflection(
+          access, "io.grpc.netty.shaded.io.netty.channel.DefaultChannelPipeline$TailContext");
+      registerClassForReflection(
+          access, "io.grpc.netty.shaded.io.grpc.netty.ProtocolNegotiators$WaitUntilActiveHandler");
+      registerClassForReflection(
+          access, "io.grpc.netty.shaded.io.grpc.netty.ProtocolNegotiators$ClientTlsHandler");
+      registerClassForReflection(
+          access, "io.grpc.netty.shaded.io.grpc.netty.ProtocolNegotiators$GrpcNegotiationHandler");
+      registerClassForReflection(
+          access, "io.grpc.netty.shaded.io.netty.channel.ChannelHandlerMask");
 
       // Epoll Libraries
       registerClassForReflection(access, "io.grpc.netty.shaded.io.netty.channel.epoll.Epoll");

gax-java/gax-grpc/src/main/resources/META-INF/native-image/com.google.api/gax-grpc/native-image.properties

@@ -9,7 +9,8 @@ Args=--add-opens=java.base/java.time=ALL-UNNAMED \
     io.grpc.netty.shaded.io.netty.channel.epoll,\
     io.grpc.netty.shaded.io.netty.channel.unix,\
     io.grpc.netty.shaded.io.netty.handler.ssl,\
-    io.grpc.internal.RetriableStream \
+    io.grpc.internal.RetriableStream,\
+    io.grpc.netty.shaded.io.netty \
   --features=com.google.api.gax.grpc.nativeimage.ProtobufMessageFeature,\
   com.google.api.gax.grpc.nativeimage.GrpcNettyFeature \
   -H:-RunReachabilityHandlersConcurrently

gax-java/gax-grpc/src/main/resources/META-INF/native-image/com.google.api/gax-grpc/reflect-config.json

@@ -283,5 +283,44 @@
         "name": "selectedKeys"
       }
     ]
+  },
+  {
+    "name" : "com.google.auth.oauth2.ServiceAccountCredentials",
+    "allDeclaredConstructors" : true,
+    "allPublicConstructors" : true,
+    "allDeclaredMethods" : true,
+    "allPublicMethods" : true,
+    "allDeclaredFields" : true,
+    "allPublicFields" : true,
+    "queryAllPublicConstructors" : true,
+    "queryAllDeclaredConstructors" : true,
+    "queryAllPublicMethods" : true,
+    "queryAllDeclaredMethods" : true
+  },
+  {
+    "name" : "org.apache.commons.pool2.impl.DefaultEvictionPolicy",
+    "allDeclaredConstructors" : true,
+    "allPublicConstructors" : true,
+    "allDeclaredMethods" : true,
+    "allPublicMethods" : true,
+    "allDeclaredFields" : true,
+    "allPublicFields" : true,
+    "queryAllPublicConstructors" : true,
+    "queryAllDeclaredConstructors" : true,
+    "queryAllPublicMethods" : true,
+    "queryAllDeclaredMethods" : true
+  },
+  {
+    "name" : "java.nio.channels.spi.SelectorProvider",
+    "allDeclaredConstructors" : true,
+    "allPublicConstructors" : true,
+    "allDeclaredMethods" : true,
+    "allPublicMethods" : true,
+    "allDeclaredFields" : true,
+    "allPublicFields" : true,
+    "queryAllPublicConstructors" : true,
+    "queryAllDeclaredConstructors" : true,
+    "queryAllPublicMethods" : true,
+    "queryAllDeclaredMethods" : true
   }
 ]