manojpec commented on a change in pull request #4352:
URL: https://github.com/apache/hudi/pull/4352#discussion_r793427314



##########
File path: 
hudi-common/src/main/java/org/apache/hudi/metadata/BaseTableMetadata.java
##########
@@ -63,7 +72,9 @@
   // Directory used for Spillable Map when merging records
   protected final String spillableMapDirectory;
 
-  protected boolean enabled;
+  protected boolean isMetadataTableEnabled;
+  protected boolean isMetaIndexBloomFilterEnabled = false;

Review comment:
       This is the base table. This is set in the derived class during the 
initialization. More changes around this will come as part of HUDI-3142. 

##########
File path: 
hudi-common/src/main/java/org/apache/hudi/metadata/BaseTableMetadata.java
##########
@@ -146,12 +156,119 @@ protected BaseTableMetadata(HoodieEngineContext 
engineContext, HoodieMetadataCon
         .getAllFilesInPartitions(partitions);
   }
 
+  @Override
+  public Option<ByteBuffer> getBloomFilter(final String partitionName, final 
String fileName)
+      throws HoodieMetadataException {
+    if (!isMetaIndexBloomFilterEnabled) {
+      LOG.error("Meta index for bloom filters is disabled!");
+      return Option.empty();
+    }
+
+    final Pair<String, String> partitionFileName = Pair.of(partitionName, 
fileName);
+    Map<Pair<String, String>, ByteBuffer> bloomFilters = 
getBloomFilters(Collections.singletonList(partitionFileName));
+    if (bloomFilters.isEmpty()) {
+      LOG.error("Meta index: missing bloom filter for partition: " + 
partitionName + ", file: " + fileName);
+      return Option.empty();
+    }
+
+    ValidationUtils.checkState(bloomFilters.containsKey(partitionFileName));
+    return Option.of(bloomFilters.get(partitionFileName));
+  }
+
+  @Override
+  public Map<Pair<String, String>, ByteBuffer> getBloomFilters(final 
List<Pair<String, String>> partitionNameFileNameList)
+      throws HoodieMetadataException {
+    if (!isMetaIndexBloomFilterEnabled) {
+      LOG.error("Meta index for bloom filter is disabled!");
+      return Collections.emptyMap();
+    }
+
+    HoodieTimer timer = new HoodieTimer().startTimer();
+    Set<String> partitionIDFileIDSortedStrings = new TreeSet<>();
+    Map<String, Pair<String, String>> fileToKeyMap = new HashMap<>();
+    partitionNameFileNameList.forEach(partitionNameFileNamePair -> {
+          final String bloomKey = new 
PartitionIndexID(partitionNameFileNamePair.getLeft()).asBase64EncodedString()
+              .concat(new 
FileIndexID(partitionNameFileNamePair.getRight()).asBase64EncodedString());
+          partitionIDFileIDSortedStrings.add(bloomKey);
+          fileToKeyMap.put(bloomKey, partitionNameFileNamePair);
+        }
+    );
+
+    List<String> partitionIDFileIDStrings = new 
ArrayList<>(partitionIDFileIDSortedStrings);
+    List<Pair<String, Option<HoodieRecord<HoodieMetadataPayload>>>> 
hoodieRecordList =
+        getRecordsByKeys(partitionIDFileIDStrings, 
MetadataPartitionType.BLOOM_FILTERS.getPartitionPath());
+    metrics.ifPresent(m -> 
m.updateMetrics(HoodieMetadataMetrics.LOOKUP_BLOOM_FILTERS_METADATA_STR, 
timer.endTimer()));

Review comment:
       fixed




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