s1monw commented on a change in pull request #601: Adding reader settings for
moving fst offheap
URL: https://github.com/apache/lucene-solr/pull/601#discussion_r264006143
##########
File path: lucene/core/src/java/org/apache/lucene/store/Directory.java
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@@ -48,6 +49,12 @@
* @see FilterDirectory
*/
public abstract class Directory implements Closeable {
+
+ /**
+ * Reader only attributes for this directory.
+ */
+ private Map<String, String> readerAttributes;
Review comment:
I don't think `Directory` is the right abstraction to hold this. I suggest
we add an overload to DirectoryReader.open that looks like this:
```Java
public static DirectoryReader open(final Directory directory, final
Map<String, String> attributes) throws IOException;
//
public static DirectoryReader open(final IndexCommit commit, final
Map<String, String> attributes) throws IOException;
```
that allows us to have a dedicated map of attributes per open call.
Subsequent reopens then inherit the attributes form the reader. You can also
then make this a property of `DirecotryReader` I guess.
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