Put table factory back to public api

Summary:
Previous I am too ambitious to hide every detail about table factory
to internal api. However, we cannot pass the compilatoin for external
users since we use table factory as the shared_ptr, which requires
the definition of table factory's destructor.

Test Plan: make check;

Reviewers: sdong, haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D15861

db/builder.cc

@@ -18,8 +18,8 @@
 #include "rocksdb/env.h"
 #include "rocksdb/iterator.h"
 #include "rocksdb/options.h"
+#include "rocksdb/table.h"
 #include "table/block_based_table_builder.h"
-#include "table/table_factory.h"
 #include "util/stop_watch.h"
 
 namespace rocksdb {

db/table_cache.h

@@ -17,7 +17,7 @@
 #include "port/port.h"
 #include "rocksdb/cache.h"
 #include "rocksdb/env.h"
-#include "table/table_factory.h"
+#include "rocksdb/table.h"
 #include "table/table_reader.h"
 
 namespace rocksdb {

include/rocksdb/table.h

@@ -29,6 +29,14 @@ namespace rocksdb {
 
 // -- Block-based Table
 class FlushBlockPolicyFactory;
+class RandomAccessFile;
+class TableBuilder;
+class TableReader;
+class WritableFile;
+struct EnvOptions;
+struct Options;
+
+using std::unique_ptr;
 
 // For advanced user only
 struct BlockBasedTableOptions {
@@ -67,4 +75,62 @@ extern TableFactory* NewPlainTableFactory(
     uint32_t user_key_len = kPlainTableVariableLength,
     int bloom_bits_per_key = 10, double hash_table_ratio = 0.75);
 
+// A base class for table factories.
+class TableFactory {
+ public:
+  virtual ~TableFactory() {}
+
+  // The type of the table.
+  //
+  // The client of this package should switch to a new name whenever
+  // the table format implementation changes.
+  //
+  // Names starting with "rocksdb." are reserved and should not be used
+  // by any clients of this package.
+  virtual const char* Name() const = 0;
+
+  // Returns a Table object table that can fetch data from file specified
+  // in parameter file. It's the caller's responsibility to make sure
+  // file is in the correct format.
+  //
+  // NewTableReader() is called in two places:
+  // (1) TableCache::FindTable() calls the function when table cache miss
+  //     and cache the table object returned.
+  // (1) SstFileReader (for SST Dump) opens the table and dump the table
+  //     contents using the interator of the table.
+  // options and soptions are options. options is the general options.
+  // Multiple configured can be accessed from there, including and not
+  // limited to block cache and key comparators.
+  // file is a file handler to handle the file for the table
+  // file_size is the physical file size of the file
+  // table_reader is the output table reader
+  virtual Status NewTableReader(
+      const Options& options, const EnvOptions& soptions,
+      const InternalKeyComparator& internal_comparator,
+      unique_ptr<RandomAccessFile>&& file, uint64_t file_size,
+      unique_ptr<TableReader>* table_reader) const = 0;
+
+  // Return a table builder to write to a file for this table type.
+  //
+  // It is called in several places:
+  // (1) When flushing memtable to a level-0 output file, it creates a table
+  //     builder (In DBImpl::WriteLevel0Table(), by calling BuildTable())
+  // (2) During compaction, it gets the builder for writing compaction output
+  //     files in DBImpl::OpenCompactionOutputFile().
+  // (3) When recovering from transaction logs, it creates a table builder to
+  //     write to a level-0 output file (In DBImpl::WriteLevel0TableForRecovery,
+  //     by calling BuildTable())
+  // (4) When running Repairer, it creates a table builder to convert logs to
+  //     SST files (In Repairer::ConvertLogToTable() by calling BuildTable())
+  //
+  // options is the general options. Multiple configured can be acceseed from
+  // there, including and not limited to compression options.
+  // file is a handle of a writable file. It is the caller's responsibility to
+  // keep the file open and close the file after closing the table builder.
+  // compression_type is the compression type to use in this table.
+  virtual TableBuilder* NewTableBuilder(
+      const Options& options, const InternalKeyComparator& internal_comparator,
+      WritableFile* file, CompressionType compression_type) const = 0;
+};
+
 }  // namespace rocksdb

table/block_based_table_factory.h

@@ -14,7 +14,6 @@
 #include "rocksdb/flush_block_policy.h"
 #include "rocksdb/options.h"
 #include "rocksdb/table.h"
-#include "table/table_factory.h"
 
 namespace rocksdb {
 

table/plain_table_factory.h

@@ -8,7 +8,6 @@
 
 #include "rocksdb/options.h"
 #include "rocksdb/table.h"
-#include "table/table_factory.h"
 
 namespace rocksdb {
 

table/table_factory.h

-//  Copyright (c) 2013, Facebook, Inc.  All rights reserved.
-//  This source code is licensed under the BSD-style license found in the
-//  LICENSE file in the root directory of this source tree. An additional grant
-//  of patent rights can be found in the PATENTS file in the same directory.
-//
-// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file. See the AUTHORS file for names of contributors.
-#pragma once
-
-#include <memory>
-#include "rocksdb/status.h"
-
-namespace rocksdb {
-
-using std::unique_ptr;
-
-class RandomAccessFile;
-class TableBuilder;
-class TableReader;
-class WritableFile;
-struct EnvOptions;
-struct Options;
-
-// A base class for table factories
-class TableFactory {
- public:
-  virtual ~TableFactory() {}
-
-  // The type of the table.
-  //
-  // The client of this package should switch to a new name whenever
-  // the table format implementation changes.
-  //
-  // Names starting with "rocksdb." are reserved and should not be used
-  // by any clients of this package.
-  virtual const char* Name() const = 0;
-
-  // Returns a Table object table that can fetch data from file specified
-  // in parameter file. It's the caller's responsibility to make sure
-  // file is in the correct format.
-  //
-  // NewTableReader() is called in two places:
-  // (1) TableCache::FindTable() calls the function when table cache miss
-  //     and cache the table object returned.
-  // (1) SstFileReader (for SST Dump) opens the table and dump the table
-  //     contents using the interator of the table.
-  // options and soptions are options. options is the general options.
-  // Multiple configured can be accessed from there, including and not
-  // limited to block cache and key comparators.
-  // file is a file handler to handle the file for the table
-  // file_size is the physical file size of the file
-  // table_reader is the output table reader
-  virtual Status NewTableReader(
-      const Options& options, const EnvOptions& soptions,
-      const InternalKeyComparator& internal_comparator,
-      unique_ptr<RandomAccessFile>&& file, uint64_t file_size,
-      unique_ptr<TableReader>* table_reader) const = 0;
-
-  // Return a table builder to write to a file for this table type.
-  //
-  // It is called in several places:
-  // (1) When flushing memtable to a level-0 output file, it creates a table
-  //     builder (In DBImpl::WriteLevel0Table(), by calling BuildTable())
-  // (2) During compaction, it gets the builder for writing compaction output
-  //     files in DBImpl::OpenCompactionOutputFile().
-  // (3) When recovering from transaction logs, it creates a table builder to
-  //     write to a level-0 output file (In DBImpl::WriteLevel0TableForRecovery,
-  //     by calling BuildTable())
-  // (4) When running Repairer, it creates a table builder to convert logs to
-  //     SST files (In Repairer::ConvertLogToTable() by calling BuildTable())
-  //
-  // options is the general options. Multiple configured can be acceseed from
-  // there, including and not limited to compression options.
-  // file is a handle of a writable file. It is the caller's responsibility to
-  // keep the file open and close the file after closing the table builder.
-  // compression_type is the compression type to use in this table.
-  virtual TableBuilder* NewTableBuilder(
-      const Options& options, const InternalKeyComparator& internal_comparator,
-      WritableFile* file, CompressionType compression_type) const = 0;
-};
-
-}  // namespace rocksdb

table/table_reader.h

@@ -12,7 +12,7 @@
 namespace rocksdb {
 
 class Iterator;
-class ParsedInternalKey;
+struct ParsedInternalKey;
 class Slice;
 struct ReadOptions;
 struct TableProperties;