chenqin commented on a change in pull request #15442:
URL: https://github.com/apache/flink/pull/15442#discussion_r605697498
##########
File path:
flink-core/src/main/java/org/apache/flink/core/fs/EntropyInjector.java
##########
@@ -93,25 +93,18 @@ public static boolean isEntropyInjecting(FileSystem fs) {
@Nullable
private static EntropyInjectingFileSystem getEntropyFs(FileSystem fs) {
- if (fs instanceof EntropyInjectingFileSystem) {
- return (EntropyInjectingFileSystem) fs;
- } else if (fs instanceof SafetyNetWrapperFileSystem) {
+ if (fs instanceof SafetyNetWrapperFileSystem) {
FileSystem delegate = ((SafetyNetWrapperFileSystem)
fs).getWrappedDelegate();
- if (delegate instanceof EntropyInjectingFileSystem) {
- return (EntropyInjectingFileSystem) delegate;
- } else if (delegate instanceof
PluginFileSystemFactory.ClassLoaderFixingFileSystem) {
- FileSystem innerFs =
- ((PluginFileSystemFactory.ClassLoaderFixingFileSystem)
delegate).getInner();
- if (innerFs instanceof EntropyInjectingFileSystem) {
- return (EntropyInjectingFileSystem) innerFs;
- }
- return null;
- } else {
- return null;
- }
- } else {
- return null;
+ return getEntropyFs(delegate);
}
+
+ if (fs instanceof PluginFileSystemFactory.ClassLoaderFixingFileSystem)
{
+ FileSystem innerFs =
+ ((PluginFileSystemFactory.ClassLoaderFixingFileSystem)
fs).getWrappedDelegate();
+ return getEntropyFs(innerFs);
+ }
Review comment:
Thanks for detailed comment. just updated pr per suggestion. It's
cleaner implementation and future proof for Matryoshka doll like filesystem
wrappers.
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