Github user anew commented on a diff in the pull request:
https://github.com/apache/incubator-tephra/pull/20#discussion_r89207961
--- Diff:
tephra-hbase-compat-1.1-base/src/main/java/org/apache/tephra/hbase/coprocessor/janitor/DataJanitorState.java
---
@@ -58,10 +105,237 @@ public long getPruneUpperBound(byte[] regionId)
throws IOException {
}
}
+ /**
+ * Get latest prune upper bounds for given regions
+ *
+ * @param regions a set of regions
+ * @return a map containing region id and its latest prune upper bound
value
+ * @throws IOException when not able to read the data from HBase
+ */
+ public Map<byte[], Long> getPruneUpperBoundForRegions(SortedSet<byte[]>
regions) throws IOException {
+ Map<byte[], Long> resultMap = new TreeMap<>(Bytes.BYTES_COMPARATOR);
+ try (Table stateTable = stateTableSupplier.get()) {
+ byte[] startRow = makeRegionKey(EMPTY_BYTE_ARRAY);
+ Scan scan = new Scan(startRow, REGION_KEY_PREFIX_STOP);
+ scan.addColumn(FAMILY, PRUNE_UPPER_BOUND_COL);
+
+ try (ResultScanner scanner = stateTable.getScanner(scan)) {
+ Result next;
+ while ((next = scanner.next()) != null) {
+ byte[] region = getRegionFromKey(next.getRow());
+ if (regions.contains(region)) {
+ byte[] timeBytes = next.getValue(FAMILY,
PRUNE_UPPER_BOUND_COL);
+ if (timeBytes != null) {
+ long pruneUpperBoundRegion = Bytes.toLong(timeBytes);
+ resultMap.put(region, pruneUpperBoundRegion);
+ }
+ }
+ }
+ }
+ return resultMap;
+ }
+ }
+
+ /**
+ * Delete all regions that are not in the given exclude set and whose
prune upper bound is less than a given value
--- End diff --
what is this used for? Might be useful to say that in the javadoc
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