ctubbsii commented on a change in pull request #1555: Fix idempotency bug in
importtable
URL: https://github.com/apache/accumulo/pull/1555#discussion_r390072003
##########
File path:
server/master/src/main/java/org/apache/accumulo/master/tableOps/MoveExportedFiles.java
##########
@@ -48,17 +49,22 @@
Map<String,String> fileNameMappings =
PopulateMetadataTable.readMappingFile(fs, tableInfo);
+ FileStatus[] exportedFiles = fs.listStatus(new
Path(tableInfo.exportDir));
+ FileStatus[] importedFiles = fs.listStatus(new
Path(tableInfo.importDir));
+
Review comment:
Guava Sets is definitely better over commons-collections CollectionUtils. We
still use Guava in 2.x, so that should be fine. If you want a pure-Java way to
do it, you could use Streams:
```java
Stream.concat(importing.stream(),imported.stream()).collect(Collectors.toSet()).equals(Set.of(fileNameMappings.values()));
```
Guava's `Sets.union` is cleaner.
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