Revert "HBASE-27794: Tooling for parsing/reading the prefetch files list file (#5468)"

This reverts commit c37fba6.

Author: wchevreuil

hbase-client/src/main/java/org/apache/hadoop/hbase/client/Admin.java

@@ -2629,9 +2629,4 @@ List<LogEntry> getLogEntries(Set<ServerName> serverNames, String logType, Server
    * Flush master local region
    */
   void flushMasterStore() throws IOException;
-
-  /**
-   * Get the list of cached files
-   */
-  List<String> getCachedFilesList(ServerName serverName) throws IOException;
 }

hbase-client/src/main/java/org/apache/hadoop/hbase/client/AdminOverAsyncAdmin.java

@@ -1125,9 +1125,4 @@ public List<LogEntry> getLogEntries(Set<ServerName> serverNames, String logType,
   public void flushMasterStore() throws IOException {
     get(admin.flushMasterStore());
   }
-
-  @Override
-  public List<String> getCachedFilesList(ServerName serverName) throws IOException {
-    return get(admin.getCachedFilesList(serverName));
-  }
 }

hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncAdmin.java

@@ -1843,9 +1843,4 @@ CompletableFuture<List<LogEntry>> getLogEntries(Set<ServerName> serverNames, Str
    * Flush master local region
    */
   CompletableFuture<Void> flushMasterStore();
-
-  /**
-   * Get the list of cached files
-   */
-  CompletableFuture<List<String>> getCachedFilesList(ServerName serverName);
 }

hbase-client/src/main/java/org/apache/hadoop/hbase/client/AsyncHBaseAdmin.java

@@ -995,9 +995,4 @@ public CompletableFuture<List<LogEntry>> getLogEntries(Set<ServerName> serverNam
   public CompletableFuture<Void> flushMasterStore() {
     return wrap(rawAdmin.flushMasterStore());
   }
-
-  @Override
-  public CompletableFuture<List<String>> getCachedFilesList(ServerName serverName) {
-    return wrap(rawAdmin.getCachedFilesList(serverName));
-  }
 }

hbase-client/src/main/java/org/apache/hadoop/hbase/client/RawAsyncHBaseAdmin.java

@@ -132,8 +132,6 @@
 import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.CompactionSwitchResponse;
 import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.FlushRegionRequest;
 import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.FlushRegionResponse;
-import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetCachedFilesListRequest;
-import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetCachedFilesListResponse;
 import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetOnlineRegionRequest;
 import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetOnlineRegionResponse;
 import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetRegionInfoRequest;
@@ -4521,15 +4519,4 @@ Void> call(controller, stub, request.build(),
           (s, c, req, done) -> s.flushMasterStore(c, req, done), resp -> null))
       .call();
   }
-
-  @Override
-  public CompletableFuture<List<String>> getCachedFilesList(ServerName serverName) {
-    GetCachedFilesListRequest.Builder request = GetCachedFilesListRequest.newBuilder();
-    return this.<List<String>> newAdminCaller()
-      .action((controller, stub) -> this.<GetCachedFilesListRequest, GetCachedFilesListResponse,
-        List<String>> adminCall(controller, stub, request.build(),
-          (s, c, req, done) -> s.getCachedFilesList(c, req, done),
-          resp -> resp.getCachedFilesList()))
-      .serverName(serverName).call();
-  }
 }

hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/ProtobufUtil.java

@@ -153,8 +153,6 @@
 import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.AdminService;
 import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.ClearSlowLogResponses;
 import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.CloseRegionRequest;
-import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetCachedFilesListRequest;
-import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetCachedFilesListResponse;
 import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetOnlineRegionRequest;
 import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetOnlineRegionResponse;
 import org.apache.hadoop.hbase.shaded.protobuf.generated.AdminProtos.GetRegionInfoRequest;
@@ -1782,21 +1780,6 @@ public static List<org.apache.hadoop.hbase.client.RegionInfo> getOnlineRegions(
     return getRegionInfos(response);
   }
 
-  /**
-   * Get the list of cached files
-   */
-  public static List<String> getCachedFilesList(final RpcController controller,
-    final AdminService.BlockingInterface admin) throws IOException {
-    GetCachedFilesListRequest request = GetCachedFilesListRequest.newBuilder().build();
-    GetCachedFilesListResponse response = null;
-    try {
-      response = admin.getCachedFilesList(controller, request);
-    } catch (ServiceException se) {
-      throw getRemoteException(se);
-    }
-    return new ArrayList<>(response.getCachedFilesList());
-  }
-
   /**
    * Get the list of region info from a GetOnlineRegionResponse
    * @param proto the GetOnlineRegionResponse

hbase-protocol-shaded/src/main/protobuf/server/region/Admin.proto

@@ -283,13 +283,6 @@ message ExecuteProceduresRequest {
 message ExecuteProceduresResponse {
 }
 
-message GetCachedFilesListRequest {
-}
-
-message GetCachedFilesListResponse {
-  repeated string cached_files = 1;
-}
-
 /**
  * Slow/Large log (LogRequest) use-case specific RPC request. This request payload will be
  * converted in bytes and sent to generic RPC API: GetLogEntries
@@ -412,7 +405,4 @@ service AdminService {
   rpc GetLogEntries(LogRequest)
     returns(LogEntry);
 
-  rpc GetCachedFilesList(GetCachedFilesListRequest)
-    returns(GetCachedFilesListResponse);
-
 }

hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/BlockCache.java

@@ -18,8 +18,6 @@
 package org.apache.hadoop.hbase.io.hfile;
 
 import java.util.Iterator;
-import java.util.Map;
-import java.util.Optional;
 import org.apache.yetus.audience.InterfaceAudience;
 
 /**
@@ -163,11 +161,4 @@ default Cacheable getBlock(BlockCacheKey cacheKey, boolean caching, boolean repe
   default boolean isMetaBlock(BlockType blockType) {
     return blockType != null && blockType.getCategory() != BlockType.BlockCategory.DATA;
   }
-
-  /**
-   * Returns the list of fully cached files
-   */
-  default Optional<Map<String, Boolean>> getFullyCachedFiles() {
-    return Optional.empty();
-  }
 }

hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/CombinedBlockCache.java

@@ -18,8 +18,6 @@
 package org.apache.hadoop.hbase.io.hfile;
 
 import java.util.Iterator;
-import java.util.Map;
-import java.util.Optional;
 import org.apache.hadoop.hbase.io.HeapSize;
 import org.apache.hadoop.hbase.io.hfile.bucket.BucketCache;
 import org.apache.yetus.audience.InterfaceAudience;
@@ -384,14 +382,6 @@ public BlockCache[] getBlockCaches() {
     return new BlockCache[] { this.l1Cache, this.l2Cache };
   }
 
-  /**
-   * Returns the list of fully cached files
-   */
-  @Override
-  public Optional<Map<String, Boolean>> getFullyCachedFiles() {
-    return this.l2Cache.getFullyCachedFiles();
-  }
-
   @Override
   public void setMaxSize(long size) {
     this.l1Cache.setMaxSize(size);

hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFilePreadReader.java

@@ -42,9 +42,8 @@ public HFilePreadReader(ReaderContext context, HFileInfo fileInfo, CacheConfig c
     final MutableBoolean fileAlreadyCached = new MutableBoolean(false);
     Optional<BucketCache> bucketCacheOptional =
       BucketCache.getBucketCacheFromCacheConfig(cacheConf);
-    bucketCacheOptional.flatMap(BucketCache::getFullyCachedFiles).ifPresent(fcf -> {
-      fileAlreadyCached.setValue(fcf.get(path.getName()) == null ? false : true);
-    });
+    bucketCacheOptional.ifPresent(bc -> fileAlreadyCached
+      .setValue(bc.getFullyCachedFiles().get(path.getName()) == null ? false : true));
     // Prefetch file blocks upon open if requested
     if (
       cacheConf.shouldPrefetchOnOpen() && cacheIfCompactionsOff()