fix compiler warning and base blob path case for searchable snapshots

CHANGELOG.md

@@ -78,6 +78,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Add GeoTile and GeoHash Grid aggregations on GeoShapes. ([#5589](https://github.com/opensearch-project/OpenSearch/pull/5589))
 - Disallow multiple data paths for search nodes ([#6427](https://github.com/opensearch-project/OpenSearch/pull/6427))
 - [Segment Replication] Allocation and rebalancing based on average primary shard count per index ([#6422](https://github.com/opensearch-project/OpenSearch/pull/6422))
+- Add 'base_path' setting to File System Repository ([#6558](https://github.com/opensearch-project/OpenSearch/pull/6558))
 
 ### Dependencies
 - Bump `org.apache.logging.log4j:log4j-core` from 2.18.0 to 2.20.0 ([#6490](https://github.com/opensearch-project/OpenSearch/pull/6490))
@@ -94,8 +95,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ### Fixed
 - Added equals/hashcode for named DocValueFormat.DateTime inner class ([#6357](https://github.com/opensearch-project/OpenSearch/pull/6357))
+- Fixed bug for searchable snapshot to take 'base_path' of blob into account ([#6558](https://github.com/opensearch-project/OpenSearch/pull/6558))
 
 ### Security
 
 [Unreleased 3.0]: https://github.com/opensearch-project/OpenSearch/compare/2.x...HEAD
-[Unreleased 2.x]: https://github.com/opensearch-project/OpenSearch/compare/2.5...2.x
+[Unreleased 2.x]: https://github.com/opensearch-project/OpenSearch/compare/2.5...2.x

server/src/internalClusterTest/java/org/opensearch/indices/replication/SegmentReplicationAllocationIT.java

@@ -193,7 +193,7 @@ public void testAllocationWithDisruption() throws Exception {
 
     /**
      * Utility method which ensures cluster has balanced primary shard distribution across a single index.
-     * @throws Exception
+     * @throws Exception exception
      */
     private void verifyPerIndexPrimaryBalance() throws Exception {
         assertBusy(() -> {

server/src/internalClusterTest/java/org/opensearch/snapshots/SearchableSnapshotIT.java

@@ -72,6 +72,7 @@ protected Settings featureFlagSettings() {
     protected Settings.Builder randomRepositorySettings() {
         final Settings.Builder settings = Settings.builder();
         settings.put("location", randomRepoPath()).put("compress", randomBoolean());
+        settings.put(FsRepository.BASE_PATH_SETTING.getKey(), "my_base_path");
         return settings;
     }
 

server/src/main/java/org/opensearch/index/store/remote/directory/RemoteSnapshotDirectoryFactory.java

@@ -73,7 +73,8 @@ private Future<RemoteSnapshotDirectory> createRemoteSnapshotDirectoryFromSnapsho
         ShardPath localShardPath,
         BlobStoreRepository blobStoreRepository
     ) throws IOException {
-        final BlobPath blobPath = new BlobPath().add("indices")
+        final BlobPath blobPath = blobStoreRepository.basePath()
+            .add("indices")
             .add(IndexSettings.SEARCHABLE_SNAPSHOT_INDEX_ID.get(indexSettings.getSettings()))
             .add(Integer.toString(localShardPath.getShardId().getId()));
         final SnapshotId snapshotId = new SnapshotId(

server/src/main/java/org/opensearch/repositories/fs/FsRepository.java

@@ -36,6 +36,7 @@
 import org.apache.logging.log4j.Logger;
 import org.opensearch.cluster.metadata.RepositoryMetadata;
 import org.opensearch.cluster.service.ClusterService;
+import org.opensearch.common.Strings;
 import org.opensearch.common.blobstore.BlobPath;
 import org.opensearch.common.blobstore.BlobStore;
 import org.opensearch.common.blobstore.fs.FsBlobStore;
@@ -98,6 +99,9 @@ public class FsRepository extends BlobStoreRepository {
         Property.NodeScope,
         Property.Deprecated
     );
+
+    public static final Setting<String> BASE_PATH_SETTING = Setting.simpleString("base_path");
+
     private final Environment environment;
 
     private ByteSizeValue chunkSize;
@@ -154,7 +158,12 @@ public FsRepository(
         } else {
             this.chunkSize = REPOSITORIES_CHUNK_SIZE_SETTING.get(environment.settings());
         }
-        this.basePath = BlobPath.cleanPath();
+        final String basePath = BASE_PATH_SETTING.get(metadata.settings());
+        if (Strings.hasLength(basePath)) {
+            this.basePath = new BlobPath().add(basePath);
+        } else {
+            this.basePath = BlobPath.cleanPath();
+        }
     }
 
     private static boolean calculateCompress(RepositoryMetadata metadata, Environment environment) {

server/src/test/java/org/opensearch/index/store/RemoteSegmentStoreDirectoryTests.java

@@ -162,7 +162,7 @@ private Map<String, String> getDummyMetadata(String prefix, int commitGeneration
      * Prepares metadata file bytes with header and footer
      * @param segmentFilesMap: actual metadata content
      * @return ByteArrayIndexInput: metadata file bytes with header and footer
-     * @throws IOException
+     * @throws IOException IOException
      */
     private ByteArrayIndexInput createMetadataFileBytes(Map<String, String> segmentFilesMap) throws IOException {
         BytesStreamOutput output = new BytesStreamOutput();

server/src/test/java/org/opensearch/repositories/fs/FsRepositoryTests.java

@@ -104,6 +104,7 @@ public void testSnapshotAndRestore() throws IOException, InterruptedException {
                 .put("location", repo)
                 .put("compress", randomBoolean())
                 .put("chunk_size", randomIntBetween(100, 1000), ByteSizeUnit.BYTES)
+                .put(FsRepository.BASE_PATH_SETTING.getKey(), "my_base_path")
                 .build();
 
             int numDocs = indexDocs(directory);