Add clang-format script and CI job (#9)

Adding scripts/format-diff.sh to use clang-format to format code changes since diverge from master. Also adding travis CI job to check if the code needs to format. Also format all existing code.
Signed-off-by: Yi Wu <yiwu@pingcap.com>

.travis.yml

@@ -9,10 +9,12 @@ addons:
   apt:
     sources:
       - ubuntu-toolchain-r-test
+      - llvm-toolchain-xenial-7
     packages:
       - g++-7
       - libgflags-dev
       - lcov
+      - clang-format-7
 
 # For GCC build, we also report code coverage to codecov.
 matrix:
@@ -26,28 +28,31 @@ matrix:
     - compiler: clang
       env: SANITIZER="UBSAN"
     - env: COMPILER=gcc7
+    - env: FORMATTER=ON
 
 install:
   - git clone --depth=1 --branch=tikv-3.0 https://github.com/pingcap/rocksdb.git
   - if [ "${COMPILER}" == gcc7 ]; then
       CC=gcc-7;
       CXX=g++-7;
-      COVERAGE_OPT="-DCODE_COVERAGE=ON";
+      export COVERAGE_OPT="-DCODE_COVERAGE=ON";
     fi
   - if [ ! -z "${BUILD_TYPE}" ]; then
-      BUILD_OPT="-DCMAKE_BUILD_TYPE=${BUILD_TYPE}";
+      export BUILD_OPT="-DCMAKE_BUILD_TYPE=${BUILD_TYPE}";
     else
-      BUILD_OPT="-DCMAKE_BUILD_TYPE=Debug";
+      export BUILD_OPT="-DCMAKE_BUILD_TYPE=Debug";
     fi
   - if [ ! -z "${SANITIZER}" ]; then
-      SANITIZER_OPT="-DWITH_${SANITIZER}=ON";
-      TOOLS_OPT="-DWITH_TITAN_TOOLS=OFF";
+      export SANITIZER_OPT="-DWITH_${SANITIZER}=ON";
+      export TOOLS_OPT="-DWITH_TITAN_TOOLS=OFF";
     fi
 
 script:
-  - cmake . -L -DROCKSDB_DIR=./rocksdb -DTRAVIS=ON ${BUILD_OPT} ${SANITIZER_OPT} ${TOOLS_OPT} ${COVERAGE_OPT}
-  - make -j4
-  - ctest -R titan
+  - if [ -z "${FORMATTER}" ]; then
+      bash scripts/travis-make.sh;
+    else
+      bash scripts/travis-format.sh;
+    fi
 
 after_success:
   - if [ "${COMPILER}" == gcc7 ]; then

README.md

@@ -32,4 +32,7 @@ cmake .. -DROCKSDB_DIR=<rocksdb_source_dir> -DWITH_SNAPPY=ON
 
 # Run tests after build. You need to filter tests by "titan" prefix.
 ctest -R titan
+
+# To format code, install clang-format and run the script.
+bash scripts/format-diff.sh
 ```

include/titan/db.h

@@ -46,8 +46,7 @@ class TitanDB : public StackableDB {
 
   using StackableDB::CreateColumnFamilies;
   Status CreateColumnFamilies(
-      const ColumnFamilyOptions& options,
-      const std::vector<std::string>& names,
+      const ColumnFamilyOptions& options, const std::vector<std::string>& names,
       std::vector<ColumnFamilyHandle*>* handles) override {
     std::vector<TitanCFDescriptor> descs;
     for (auto& name : names) {
@@ -75,7 +74,8 @@ class TitanDB : public StackableDB {
   Status DropColumnFamilies(
       const std::vector<ColumnFamilyHandle*>& handles) override = 0;
 
-  Status DestroyColumnFamilyHandle(ColumnFamilyHandle* column_family) override = 0;
+  Status DestroyColumnFamilyHandle(ColumnFamilyHandle* column_family) override =
+      0;
 
   using StackableDB::Merge;
   Status Merge(const WriteOptions&, ColumnFamilyHandle*, const Slice& /*key*/,
@@ -85,8 +85,8 @@ class TitanDB : public StackableDB {
 
   using rocksdb::StackableDB::SingleDelete;
   Status SingleDelete(const WriteOptions& /*wopts*/,
-                              ColumnFamilyHandle* /*column_family*/,
-                              const Slice& /*key*/) override {
+                      ColumnFamilyHandle* /*column_family*/,
+                      const Slice& /*key*/) override {
     return Status::NotSupported("Not supported operation in titan db.");
   }
 

scripts/format-diff.sh

+#!/bin/bash
+
+git diff `git merge-base master HEAD` | clang-format-diff -style=google -p1 -i

scripts/travis-format.sh

+#!/bin/bash
+
+set -ev
+git fetch --depth=1 origin master:master;
+git diff $(git merge-base master HEAD) HEAD > diff;
+cat diff | clang-format-diff-7 -style=google -p1 > formatted;
+if [ -s formatted ]; then
+  cat formatted;
+  echo "Run scripts/format-diff.sh to format your code.";
+  exit 1;
+fi;

scripts/travis-make.sh

+#!/bin/bash
+
+set -ev
+cmake . -L -DROCKSDB_DIR=./rocksdb -DTRAVIS=ON ${BUILD_OPT} ${SANITIZER_OPT} ${TOOLS_OPT} ${COVERAGE_OPT}
+make -j4
+ctest -R titan
+

src/base_db_listener.h

 #pragma once
 
-#include "rocksdb/listener.h"
 #include "db_impl.h"
+#include "rocksdb/listener.h"
 
 namespace rocksdb {
 

src/blob_file_builder.h

 #pragma once
 
-#include "util/file_reader_writer.h"
 #include "blob_format.h"
 #include "titan/options.h"
+#include "util/file_reader_writer.h"
 
 namespace rocksdb {
 namespace titandb {

src/blob_file_cache.cc

 #include "blob_file_cache.h"
 
-#include "util/filename.h"
 #include "util.h"
+#include "util/filename.h"
 
 namespace rocksdb {
 namespace titandb {

src/blob_file_cache.h

 #pragma once
 
-#include "rocksdb/options.h"
 #include "blob_file_reader.h"
 #include "blob_format.h"
+#include "rocksdb/options.h"
 #include "titan/options.h"
 
 namespace rocksdb {

src/blob_file_iterator.cc

 #include "blob_file_iterator.h"
 
-#include "util/crc32c.h"
 #include "util.h"
+#include "util/crc32c.h"
 
 namespace rocksdb {
 namespace titandb {

src/blob_file_iterator.h

@@ -3,13 +3,13 @@
 #include <cstdint>
 #include <queue>
 
+#include "blob_format.h"
 #include "rocksdb/slice.h"
 #include "rocksdb/status.h"
 #include "table/internal_iterator.h"
-#include "util/file_reader_writer.h"
-#include "blob_format.h"
 #include "titan/options.h"
 #include "util.h"
+#include "util/file_reader_writer.h"
 
 namespace rocksdb {
 namespace titandb {

src/blob_file_iterator_test.cc

@@ -2,11 +2,11 @@
 
 #include <cinttypes>
 
-#include "util/filename.h"
-#include "util/testharness.h"
 #include "blob_file_builder.h"
 #include "blob_file_cache.h"
 #include "blob_file_reader.h"
+#include "util/filename.h"
+#include "util/testharness.h"
 
 namespace rocksdb {
 namespace titandb {
@@ -57,7 +57,8 @@ class BlobFileIteratorTest : public testing::Test {
     {
       std::unique_ptr<WritableFile> f;
       ASSERT_OK(env_->NewWritableFile(file_name_, &f, env_options_));
-      writable_file_.reset(new WritableFileWriter(std::move(f), file_name_, env_options_));
+      writable_file_.reset(
+          new WritableFileWriter(std::move(f), file_name_, env_options_));
     }
     builder_.reset(new BlobFileBuilder(cf_options, writable_file_.get()));
   }

src/blob_file_manager.h

 #pragma once
 
-#include "util/file_reader_writer.h"
 #include "blob_format.h"
+#include "util/file_reader_writer.h"
 
 namespace rocksdb {
 namespace titandb {

src/blob_file_reader.h

 #pragma once
 
-#include "util/file_reader_writer.h"
 #include "blob_format.h"
 #include "titan/options.h"
+#include "util/file_reader_writer.h"
 
 namespace rocksdb {
 namespace titandb {

src/blob_file_size_collector.h

 #pragma once
 
+#include "db_impl.h"
 #include "rocksdb/listener.h"
 #include "rocksdb/table_properties.h"
 #include "util/coding.h"
-#include "db_impl.h"
 #include "version_set.h"
 
 namespace rocksdb {

src/blob_file_size_collector_test.cc

@@ -40,8 +40,8 @@ class BlobFileSizeCollectorTest : public testing::Test {
   void NewFileWriter(std::unique_ptr<WritableFileWriter>* result) {
     std::unique_ptr<WritableFile> writable_file;
     ASSERT_OK(env_->NewWritableFile(file_name_, &writable_file, env_options_));
-    result->reset(
-        new WritableFileWriter(std::move(writable_file), file_name_, env_options_));
+    result->reset(new WritableFileWriter(std::move(writable_file), file_name_,
+                                         env_options_));
     ASSERT_TRUE(*result);
   }
 

src/blob_file_test.cc

-#include "util/filename.h"
-#include "util/testharness.h"
 #include "blob_file_builder.h"
 #include "blob_file_cache.h"
 #include "blob_file_reader.h"
+#include "util/filename.h"
+#include "util/testharness.h"
 
 namespace rocksdb {
 namespace titandb {
@@ -31,7 +31,8 @@ class BlobFileTest : public testing::Test {
     {
       std::unique_ptr<WritableFile> f;
       ASSERT_OK(env_->NewWritableFile(file_name_, &f, env_options_));
-      file.reset(new WritableFileWriter(std::move(f), file_name_, env_options_));
+      file.reset(
+          new WritableFileWriter(std::move(f), file_name_, env_options_));
     }
     std::unique_ptr<BlobFileBuilder> builder(
         new BlobFileBuilder(cf_options, file.get()));
@@ -91,7 +92,8 @@ class BlobFileTest : public testing::Test {
     {
       std::unique_ptr<WritableFile> f;
       ASSERT_OK(env_->NewWritableFile(file_name_, &f, env_options_));
-      file.reset(new WritableFileWriter(std::move(f), file_name_, env_options_));
+      file.reset(
+          new WritableFileWriter(std::move(f), file_name_, env_options_));
     }
     std::unique_ptr<BlobFileBuilder> builder(
         new BlobFileBuilder(cf_options, file.get()));

src/blob_format_test.cc

 #include "blob_format.h"
-#include "util/testharness.h"
 #include "testutil.h"
 #include "util.h"
+#include "util/testharness.h"
 
 namespace rocksdb {
 namespace titandb {

src/blob_gc.cc

@@ -12,9 +12,7 @@ BlobGC::BlobGC(std::vector<BlobFileMeta*>&& blob_files,
 
 BlobGC::~BlobGC() {}
 
-void BlobGC::SetColumnFamily(ColumnFamilyHandle* cfh) {
-  cfh_ = cfh;
-}
+void BlobGC::SetColumnFamily(ColumnFamilyHandle* cfh) { cfh_ = cfh; }
 
 ColumnFamilyData* BlobGC::GetColumnFamilyData() {
   auto* cfhi = reinterpret_cast<ColumnFamilyHandleImpl*>(cfh_);

src/blob_gc.h

@@ -2,8 +2,8 @@
 
 #include <memory>
 
-#include "db/column_family.h"
 #include "blob_format.h"
+#include "db/column_family.h"
 #include "titan/options.h"
 
 namespace rocksdb {

src/blob_gc_job.h

 #pragma once
 
-#include "db/db_impl.h"
-#include "rocksdb/status.h"
 #include "blob_file_builder.h"
 #include "blob_file_iterator.h"
 #include "blob_file_manager.h"
 #include "blob_gc.h"
+#include "db/db_impl.h"
+#include "rocksdb/status.h"
 #include "titan/options.h"
 #include "version_set.h"
 

src/blob_gc_job_test.cc

 #include "blob_gc_job.h"
 
-#include "util/testharness.h"
 #include "blob_gc_picker.h"
 #include "db_impl.h"
+#include "util/testharness.h"
 
 namespace rocksdb {
 namespace titandb {
@@ -42,7 +42,9 @@ class BlobGCJobTest : public testing::Test {
   ~BlobGCJobTest() {}
 
   void CheckBlobNumber(int expected) {
-    auto b = version_set_->GetBlobStorage(base_db_->DefaultColumnFamily()->GetID()).lock();
+    auto b =
+        version_set_->GetBlobStorage(base_db_->DefaultColumnFamily()->GetID())
+            .lock();
     ASSERT_EQ(expected, b->files_.size());
   }
 
@@ -80,7 +82,7 @@ class BlobGCJobTest : public testing::Test {
   }
 
   void DestroyDB() {
-    Status s __attribute__((__unused__)) = db_->Close(); 
+    Status s __attribute__((__unused__)) = db_->Close();
     assert(s.ok());
     delete db_;
     db_ = nullptr;
@@ -121,7 +123,7 @@ class BlobGCJobTest : public testing::Test {
         s = blob_gc_job.Run();
         mutex_->Lock();
       }
-      
+
       if (s.ok()) {
         s = blob_gc_job.Finish();
         ASSERT_OK(s);
@@ -182,12 +184,14 @@ class BlobGCJobTest : public testing::Test {
       db_->Delete(WriteOptions(), GenKey(i));
     }
     Flush();
-    auto b = version_set_->GetBlobStorage(base_db_->DefaultColumnFamily()->GetID()).lock();
+    auto b =
+        version_set_->GetBlobStorage(base_db_->DefaultColumnFamily()->GetID())
+            .lock();
     ASSERT_EQ(b->files_.size(), 1);
     auto old = b->files_.begin()->first;
-//    for (auto& f : b->files_) {
-//      f.second->marked_for_sample = false;
-//    }
+    //    for (auto& f : b->files_) {
+    //      f.second->marked_for_sample = false;
+    //    }
     std::unique_ptr<BlobFileIterator> iter;
     ASSERT_OK(NewIterator(b->files_.begin()->second->file_number(),
                           b->files_.begin()->second->file_size(), &iter));
@@ -198,7 +202,8 @@ class BlobGCJobTest : public testing::Test {
       ASSERT_TRUE(iter->key().compare(Slice(GenKey(i))) == 0);
     }
     RunGC();
-    b = version_set_->GetBlobStorage(base_db_->DefaultColumnFamily()->GetID()).lock();
+    b = version_set_->GetBlobStorage(base_db_->DefaultColumnFamily()->GetID())
+            .lock();
     ASSERT_EQ(b->files_.size(), 1);
     auto new1 = b->files_.begin()->first;
     ASSERT_TRUE(old != new1);
@@ -234,14 +239,15 @@ TEST_F(BlobGCJobTest, DiscardEntry) { TestDiscardEntry(); }
 
 TEST_F(BlobGCJobTest, RunGC) { TestRunGC(); }
 
-// Tests blob file will be kept after GC, if it is still visible by active snapshots.
+// Tests blob file will be kept after GC, if it is still visible by active
+// snapshots.
 TEST_F(BlobGCJobTest, PurgeBlobs) {
   NewDB();
 
   auto snap1 = db_->GetSnapshot();
-  
+
   for (int i = 0; i < 10; i++) {
-      db_->Put(WriteOptions(), GenKey(i), GenValue(i));
+    db_->Put(WriteOptions(), GenKey(i), GenValue(i));
   }
   Flush();
   CheckBlobNumber(1);
@@ -254,7 +260,7 @@ TEST_F(BlobGCJobTest, PurgeBlobs) {
   Flush();
   CheckBlobNumber(1);
   auto snap4 = db_->GetSnapshot();
-  
+
   RunGC();
   CheckBlobNumber(1);
 
@@ -264,7 +270,7 @@ TEST_F(BlobGCJobTest, PurgeBlobs) {
   Flush();
   auto snap5 = db_->GetSnapshot();
   CheckBlobNumber(2);
-  
+
   db_->ReleaseSnapshot(snap2);
   RunGC();
   CheckBlobNumber(2);
@@ -280,7 +286,7 @@ TEST_F(BlobGCJobTest, PurgeBlobs) {
   db_->ReleaseSnapshot(snap4);
   RunGC();
   CheckBlobNumber(1);
-  
+
   db_->ReleaseSnapshot(snap5);
   RunGC();
   CheckBlobNumber(1);

src/blob_gc_picker.cc

@@ -16,7 +16,8 @@ std::unique_ptr<BlobGC> BasicBlobGCPicker::PickBlobGC(
 
   uint64_t batch_size = 0;
   //  ROCKS_LOG_INFO(db_options_.info_log, "blob file num:%lu gc score:%lu",
-  //                 blob_storage->NumBlobFiles(), blob_storage->gc_score().size());
+  //                 blob_storage->NumBlobFiles(),
+  //                 blob_storage->gc_score().size());
   for (auto& gc_score : blob_storage->gc_score()) {
     auto blob_file = blob_storage->FindFile(gc_score.file_number).lock();
     assert(blob_file);

src/blob_gc_picker.h

@@ -2,14 +2,14 @@
 
 #include <memory>
 
-#include "db/column_family.h"
-#include "db/write_callback.h"
-#include "rocksdb/status.h"
-#include "util/filename.h"
 #include "blob_file_manager.h"
 #include "blob_format.h"
 #include "blob_gc.h"
 #include "blob_storage.h"
+#include "db/column_family.h"
+#include "db/write_callback.h"
+#include "rocksdb/status.h"
+#include "util/filename.h"
 
 namespace rocksdb {
 namespace titandb {

src/blob_gc_picker_test.cc

 #include "blob_gc_picker.h"
 
-#include "util/filename.h"
-#include "util/testharness.h"
 #include "blob_file_builder.h"
 #include "blob_file_cache.h"
 #include "blob_file_iterator.h"
 #include "blob_file_reader.h"
+#include "util/filename.h"
+#include "util/testharness.h"
 
 namespace rocksdb {
 namespace titandb {
@@ -22,8 +22,10 @@ class BlobGCPickerTest : public testing::Test {
                                const TitanCFOptions& titan_cf_options) {
     auto blob_file_cache = std::make_shared<BlobFileCache>(
         titan_db_options, titan_cf_options, NewLRUCache(128));
-    blob_storage_.reset(new BlobStorage(titan_db_options, titan_cf_options, blob_file_cache));
-    basic_blob_gc_picker_.reset(new BasicBlobGCPicker(titan_db_options, titan_cf_options));
+    blob_storage_.reset(
+        new BlobStorage(titan_db_options, titan_cf_options, blob_file_cache));
+    basic_blob_gc_picker_.reset(
+        new BasicBlobGCPicker(titan_db_options, titan_cf_options));
   }
 
   void AddBlobFile(uint64_t file_number, uint64_t file_size,

src/blob_storage.cc

@@ -37,7 +37,7 @@ std::weak_ptr<BlobFileMeta> BlobStorage::FindFile(uint64_t file_number) const {
 void BlobStorage::ExportBlobFiles(
     std::map<uint64_t, std::weak_ptr<BlobFileMeta>>& ret) const {
   ReadLock rl(&mutex_);
-  for(auto& kv : files_) {
+  for (auto& kv : files_) {
     ret.emplace(kv.first, std::weak_ptr<BlobFileMeta>(kv.second));
   }
 }
@@ -47,13 +47,16 @@ void BlobStorage::AddBlobFile(std::shared_ptr<BlobFileMeta>& file) {
   files_.emplace(std::make_pair(file->file_number(), file));
 }
 
-void BlobStorage::MarkFileObsolete(std::shared_ptr<BlobFileMeta> file, SequenceNumber obsolete_sequence) {
+void BlobStorage::MarkFileObsolete(std::shared_ptr<BlobFileMeta> file,
+                                   SequenceNumber obsolete_sequence) {
   WriteLock wl(&mutex_);
-  obsolete_files_.push_back(std::make_pair(file->file_number(), obsolete_sequence));
+  obsolete_files_.push_back(
+      std::make_pair(file->file_number(), obsolete_sequence));
   file->FileStateTransit(BlobFileMeta::FileEvent::kDelete);
 }
 
-void BlobStorage::GetObsoleteFiles(std::vector<std::string>* obsolete_files, SequenceNumber oldest_sequence) {
+void BlobStorage::GetObsoleteFiles(std::vector<std::string>* obsolete_files,
+                                   SequenceNumber oldest_sequence) {
   WriteLock wl(&mutex_);
 
   for (auto it = obsolete_files_.begin(); it != obsolete_files_.end();) {
@@ -68,14 +71,14 @@ void BlobStorage::GetObsoleteFiles(std::vector<std::string>* obsolete_files, Seq
       file_cache_->Evict(file_number);
 
       ROCKS_LOG_INFO(db_options_.info_log,
-        "Obsolete blob file %" PRIu64 " (obsolete at %" PRIu64
-        ") not visible to oldest snapshot %" PRIu64 ", delete it.",
-        file_number, obsolete_sequence, oldest_sequence);
+                     "Obsolete blob file %" PRIu64 " (obsolete at %" PRIu64
+                     ") not visible to oldest snapshot %" PRIu64 ", delete it.",
+                     file_number, obsolete_sequence, oldest_sequence);
       if (obsolete_files) {
         obsolete_files->emplace_back(
-          BlobFileName(db_options_.dirname, file_number));
+            BlobFileName(db_options_.dirname, file_number));
       }
-      
+
       it = obsolete_files_.erase(it);
       continue;
     }
@@ -96,8 +99,7 @@ void BlobStorage::ComputeGCScore() {
       gc_score_.push_back({});
       auto& gcs = gc_score_.back();
       gcs.file_number = file.first;
-      if (file.second->file_size() <
-          cf_options_.merge_small_file_threshold) {
+      if (file.second->file_size() < cf_options_.merge_small_file_threshold) {
         gcs.score = 1;
       } else {
         gcs.score = file.second->GetDiscardableRatio();
@@ -111,6 +113,5 @@ void BlobStorage::ComputeGCScore() {
             });
 }
 
-
 }  // namespace titandb
 }  // namespace rocksdb

src/blob_storage.h

@@ -2,10 +2,10 @@
 
 #include <inttypes.h>
 
-#include "rocksdb/options.h"
 #include "blob_file_cache.h"
 #include "blob_format.h"
 #include "blob_gc.h"
+#include "rocksdb/options.h"
 
 namespace rocksdb {
 namespace titandb {
@@ -21,12 +21,16 @@ class BlobStorage {
     this->cf_options_ = bs.cf_options_;
   }
 
-  BlobStorage(const TitanDBOptions& _db_options, const TitanCFOptions& _cf_options,
+  BlobStorage(const TitanDBOptions& _db_options,
+              const TitanCFOptions& _cf_options,
               std::shared_ptr<BlobFileCache> _file_cache)
-      : db_options_(_db_options), cf_options_(_cf_options), file_cache_(_file_cache), destroyed_(false) {}
+      : db_options_(_db_options),
+        cf_options_(_cf_options),
+        file_cache_(_file_cache),
+        destroyed_(false) {}
 
   ~BlobStorage() {
-    for (auto& file: files_) {
+    for (auto& file : files_) {
       file_cache_->Evict(file.second->file_number());
     }
   }
@@ -45,11 +49,11 @@ class BlobStorage {
   // corruption if the file doesn't exist in the specific version.
   std::weak_ptr<BlobFileMeta> FindFile(uint64_t file_number) const;
 
-  std::size_t NumBlobFiles() const { 
+  std::size_t NumBlobFiles() const {
     ReadLock rl(&mutex_);
-    return files_.size(); 
+    return files_.size();
   }
-  
+
   void ExportBlobFiles(
       std::map<uint64_t, std::weak_ptr<BlobFileMeta>>& ret) const;
 
@@ -78,9 +82,11 @@ class BlobStorage {
 
   void AddBlobFile(std::shared_ptr<BlobFileMeta>& file);
 
-  void GetObsoleteFiles(std::vector<std::string>* obsolete_files, SequenceNumber oldest_sequence);
+  void GetObsoleteFiles(std::vector<std::string>* obsolete_files,
+                        SequenceNumber oldest_sequence);
 
-  void MarkFileObsolete(std::shared_ptr<BlobFileMeta> file, SequenceNumber obsolete_sequence);
+  void MarkFileObsolete(std::shared_ptr<BlobFileMeta> file,
+                        SequenceNumber obsolete_sequence);
 
  private:
   friend class VersionSet;
@@ -92,7 +98,7 @@ class BlobStorage {
   TitanDBOptions db_options_;
   TitanCFOptions cf_options_;
 
-  // Read Write Mutex, which protects the `files_` structures 
+  // Read Write Mutex, which protects the `files_` structures
   mutable port::RWMutex mutex_;
 
   // Only BlobStorage OWNS BlobFileMeta
@@ -103,7 +109,8 @@ class BlobStorage {
 
   std::list<std::pair<uint64_t, SequenceNumber>> obsolete_files_;
   // It is marked when the column family handle is destroyed, indicating the
-  // in-memory data structure can be destroyed. Physical files may still be kept.
+  // in-memory data structure can be destroyed. Physical files may still be
+  // kept.
   bool destroyed_;
 };
 

src/db_impl.cc

@@ -125,7 +125,7 @@ TitanDBImpl::TitanDBImpl(const TitanDBOptions& options,
 TitanDBImpl::~TitanDBImpl() { Close(); }
 
 // how often to schedule delete obs files periods
-static constexpr uint32_t kDeleteObsoleteFilesPeriodSecs = 10; // 10s
+static constexpr uint32_t kDeleteObsoleteFilesPeriodSecs = 10;  // 10s
 
 void TitanDBImpl::StartBackgroundTasks() {
   if (!thread_purge_obsolete_) {
@@ -287,7 +287,7 @@ Status TitanDBImpl::CreateColumnFamilies(
 Status TitanDBImpl::DropColumnFamilies(
     const std::vector<ColumnFamilyHandle*>& handles) {
   std::vector<uint32_t> column_families;
-  for (auto& handle: handles) { 
+  for (auto& handle : handles) {
     column_families.emplace_back(handle->GetID());
   }
   Status s = db_impl_->DropColumnFamilies(handles);
@@ -299,7 +299,8 @@ Status TitanDBImpl::DropColumnFamilies(
   return s;
 }
 
-Status TitanDBImpl::DestroyColumnFamilyHandle(ColumnFamilyHandle* column_family) {
+Status TitanDBImpl::DestroyColumnFamilyHandle(
+    ColumnFamilyHandle* column_family) {
   auto cf_id = column_family->GetID();
   Status s = db_impl_->DestroyColumnFamilyHandle(column_family);
 
@@ -365,7 +366,8 @@ Status TitanDBImpl::GetImpl(const ReadOptions& options,
 
   s = storage->Get(options, index, &record, &buffer);
   if (s.IsCorruption()) {
-    ROCKS_LOG_DEBUG(db_options_.info_log, "Key:%s Snapshot:%" PRIu64 " GetBlobFile err:%s\n",
+    ROCKS_LOG_DEBUG(db_options_.info_log,
+                    "Key:%s Snapshot:%" PRIu64 " GetBlobFile err:%s\n",
                     key.ToString(true).c_str(),
                     options.snapshot->GetSequenceNumber(),
                     s.ToString().c_str());
@@ -426,14 +428,14 @@ Iterator* TitanDBImpl::NewIteratorImpl(
     const ReadOptions& options, ColumnFamilyHandle* handle,
     std::shared_ptr<ManagedSnapshot> snapshot) {
   auto cfd = reinterpret_cast<ColumnFamilyHandleImpl*>(handle)->cfd();
-  
+
   mutex_.Lock();
   auto storage = vset_->GetBlobStorage(handle->GetID());
   mutex_.Unlock();
-  
+
   std::unique_ptr<ArenaWrappedDBIter> iter(db_impl_->NewIteratorImpl(
-      options, cfd, options.snapshot->GetSequenceNumber(), nullptr /*read_callback*/,
-      true /*allow_blob*/, true /*allow_refresh*/));
+      options, cfd, options.snapshot->GetSequenceNumber(),
+      nullptr /*read_callback*/, true /*allow_blob*/, true /*allow_refresh*/));
   return new TitanDBIterator(options, storage.lock().get(), snapshot,
                              std::move(iter));
 }
@@ -456,12 +458,10 @@ Status TitanDBImpl::NewIterators(
   return Status::OK();
 }
 
-const Snapshot* TitanDBImpl::GetSnapshot() {
-  return db_->GetSnapshot();
-}
+const Snapshot* TitanDBImpl::GetSnapshot() { return db_->GetSnapshot(); }
 
 void TitanDBImpl::ReleaseSnapshot(const Snapshot* snapshot) {
-  // TODO: 
+  // TODO:
   // We can record here whether the oldest snapshot is released.
   // If not, we can just skip the next round of purging obsolete files.
   db_->ReleaseSnapshot(snapshot);

src/db_impl.h

 #pragma once
 
+#include "blob_file_manager.h"
 #include "db/db_impl.h"
-#include "util/repeatable_thread.h"
 #include "titan/db.h"
-#include "blob_file_manager.h"
+#include "util/repeatable_thread.h"
 #include "version_set.h"
 
 namespace rocksdb {
@@ -71,6 +71,7 @@ class TitanDBImpl : public TitanDB {
   void OnCompactionCompleted(const CompactionJobInfo& compaction_job_info);
 
   void StartBackgroundTasks();
+
  private:
   class FileManager;
   friend class FileManager;

src/db_impl_files.cc

@@ -21,7 +21,7 @@ void TitanDBImpl::PurgeObsoleteFiles() {
 
   for (const auto& candidate_file : candidate_files) {
     ROCKS_LOG_INFO(db_options_.info_log, "Titan deleting obsolete file [%s]",
-                    candidate_file.c_str());
+                   candidate_file.c_str());
     s = env_->DeleteFile(candidate_file);
     if (!s.ok()) {
       fprintf(stderr, "Titan deleting file [%s] failed, status:%s",

src/db_iter.h

@@ -25,7 +25,7 @@ class TitanDBIterator : public Iterator {
 
   Status status() const override {
     // assume volatile inner iter
-    if(status_.ok()) {
+    if (status_.ok()) {
       return iter_->status();
     } else {
       return status_;

src/table_builder.h

 #pragma once
 
-#include "table/table_builder.h"
 #include "blob_file_builder.h"
 #include "blob_file_manager.h"
+#include "table/table_builder.h"
 #include "titan/options.h"
 
 namespace rocksdb {

src/table_builder_test.cc

 #include "table/table_builder.h"
-#include "table/table_reader.h"
-#include "util/filename.h"
-#include "util/testharness.h"
 #include "blob_file_manager.h"
 #include "blob_file_reader.h"
+#include "table/table_reader.h"
 #include "table_factory.h"
+#include "util/filename.h"
+#include "util/testharness.h"
 
 namespace rocksdb {
 namespace titandb {
@@ -80,7 +80,8 @@ class TableBuilderTest : public testing::Test {
     db_options_.dirname = tmpdir_;
     cf_options_.min_blob_size = kMinBlobSize;
     blob_manager_.reset(new FileManager(db_options_));
-    table_factory_.reset(new TitanTableFactory(db_options_, cf_options_, blob_manager_));
+    table_factory_.reset(
+        new TitanTableFactory(db_options_, cf_options_, blob_manager_));
   }
 
   ~TableBuilderTest() {

src/table_factory.h

 #pragma once
 
-#include "rocksdb/table.h"
 #include "blob_file_manager.h"
+#include "rocksdb/table.h"
 #include "titan/options.h"
 
 namespace rocksdb {

src/titan_fault_injection_test_env.h

@@ -14,27 +14,23 @@ class TitanTestRandomAccessFile : public RandomAccessFile {
  public:
   explicit TitanTestRandomAccessFile(std::unique_ptr<RandomAccessFile>&& f,
                                      TitanFaultInjectionTestEnv* env)
-      : target_(std::move(f)),
-        env_(env) {
+      : target_(std::move(f)), env_(env) {
     assert(target_ != nullptr);
   }
-  virtual ~TitanTestRandomAccessFile() { }
+  virtual ~TitanTestRandomAccessFile() {}
   Status Read(uint64_t offset, size_t n, Slice* result,
               char* scratch) const override;
   Status Prefetch(uint64_t offset, size_t n) override;
   size_t GetUniqueId(char* id, size_t max_size) const override {
     return target_->GetUniqueId(id, max_size);
   }
-  void Hint(AccessPattern pattern) override {
-    return target_->Hint(pattern);
-  }
-  bool use_direct_io() const override {
-    return target_->use_direct_io();
-  }
+  void Hint(AccessPattern pattern) override { return target_->Hint(pattern); }
+  bool use_direct_io() const override { return target_->use_direct_io(); }
   size_t GetRequiredBufferAlignment() const override {
     return target_->GetRequiredBufferAlignment();
   }
   Status InvalidateCache(size_t offset, size_t length) override;
+
  private:
   std::unique_ptr<RandomAccessFile> target_;
   TitanFaultInjectionTestEnv* env_;
@@ -42,9 +38,8 @@ class TitanTestRandomAccessFile : public RandomAccessFile {
 
 class TitanFaultInjectionTestEnv : public FaultInjectionTestEnv {
  public:
-  TitanFaultInjectionTestEnv(Env* t)
-      : FaultInjectionTestEnv(t) { }
-  virtual ~TitanFaultInjectionTestEnv() { }
+  TitanFaultInjectionTestEnv(Env* t) : FaultInjectionTestEnv(t) {}
+  virtual ~TitanFaultInjectionTestEnv() {}
   Status NewRandomAccessFile(const std::string& fname,
                              std::unique_ptr<RandomAccessFile>* result,
                              const EnvOptions& soptions) {
@@ -59,27 +54,28 @@ class TitanFaultInjectionTestEnv : public FaultInjectionTestEnv {
   }
 };
 
-Status TitanTestRandomAccessFile::Read(uint64_t offset, size_t n, 
-                                       Slice* result, char* scratch) const {
-  if(!env_->IsFilesystemActive()) {
+Status TitanTestRandomAccessFile::Read(uint64_t offset, size_t n, Slice* result,
+                                       char* scratch) const {
+  if (!env_->IsFilesystemActive()) {
     return env_->GetError();
   }
   return target_->Read(offset, n, result, scratch);
 }
 
 Status TitanTestRandomAccessFile::Prefetch(uint64_t offset, size_t n) {
-  if(!env_->IsFilesystemActive()) {
+  if (!env_->IsFilesystemActive()) {
     return env_->GetError();
   }
   return target_->Prefetch(offset, n);
 }
 
-Status TitanTestRandomAccessFile::InvalidateCache(size_t offset, size_t length) {
-  if(!env_->IsFilesystemActive()) {
+Status TitanTestRandomAccessFile::InvalidateCache(size_t offset,
+                                                  size_t length) {
+  if (!env_->IsFilesystemActive()) {
     return env_->GetError();
   }
   return target_->InvalidateCache(offset, length);
 }
 
-} // namespace titandb
-} // namespace rocksdb
+}  // namespace titandb
+}  // namespace rocksdb
\ No newline at end of file

src/version_edit.h

@@ -2,8 +2,8 @@
 
 #include <set>
 
-#include "rocksdb/slice.h"
 #include "blob_format.h"
+#include "rocksdb/slice.h"
 
 namespace rocksdb {
 namespace titandb {
@@ -21,7 +21,8 @@ class VersionEdit {
     added_files_.push_back(file);
   }
 
-  void DeleteBlobFile(uint64_t file_number, SequenceNumber obsolete_sequence = 0) {
+  void DeleteBlobFile(uint64_t file_number,
+                      SequenceNumber obsolete_sequence = 0) {
     deleted_files_.emplace_back(std::make_pair(file_number, obsolete_sequence));
   }
 

src/version_set.cc

@@ -210,10 +210,10 @@ Status VersionSet::Apply(VersionEdit* edit) {
   auto cf_id = edit->column_family_id_;
   auto it = column_families_.find(cf_id);
   if (it == column_families_.end()) {
-    // TODO: support OpenForReadOnly which doesn't open DB with all column family
-    // so there are maybe some invalid column family, but we can't just skip it
-    // otherwise blob files of the non-open column families will be regarded as
-    // obsolete and deleted.
+    // TODO: support OpenForReadOnly which doesn't open DB with all column
+    // family so there are maybe some invalid column family, but we can't just
+    // skip it otherwise blob files of the non-open column families will be
+    // regarded as obsolete and deleted.
     return Status::OK();
   }
   auto& files = it->second->files_;
@@ -225,7 +225,8 @@ Status VersionSet::Apply(VersionEdit* edit) {
       fprintf(stderr, "blob file %" PRIu64 " doesn't exist before\n", number);
       abort();
     } else if (blob_it->second->is_obsolete()) {
-      fprintf(stderr, "blob file %" PRIu64 " has been deleted before\n", number);
+      fprintf(stderr, "blob file %" PRIu64 " has been deleted before\n",
+              number);
       abort();
     }
     it->second->MarkFileObsolete(blob_it->second, file.second);
@@ -236,9 +237,11 @@ Status VersionSet::Apply(VersionEdit* edit) {
     auto blob_it = files.find(number);
     if (blob_it != files.end()) {
       if (blob_it->second->is_obsolete()) {
-        fprintf(stderr, "blob file %" PRIu64 " has been deleted before\n", number);
+        fprintf(stderr, "blob file %" PRIu64 " has been deleted before\n",
+                number);
       } else {
-        fprintf(stderr, "blob file %" PRIu64 " has been added before\n", number);
+        fprintf(stderr, "blob file %" PRIu64 " has been added before\n",
+                number);
       }
       abort();
     }
@@ -249,37 +252,41 @@ Status VersionSet::Apply(VersionEdit* edit) {
   return Status::OK();
 }
 
-void VersionSet::AddColumnFamilies(const std::map<uint32_t, TitanCFOptions>& column_families) {
+void VersionSet::AddColumnFamilies(
+    const std::map<uint32_t, TitanCFOptions>& column_families) {
   for (auto& cf : column_families) {
     auto file_cache =
         std::make_shared<BlobFileCache>(db_options_, cf.second, file_cache_);
-    auto blob_storage = std::make_shared<BlobStorage>(db_options_, cf.second, file_cache);
+    auto blob_storage =
+        std::make_shared<BlobStorage>(db_options_, cf.second, file_cache);
     column_families_.emplace(cf.first, blob_storage);
   }
 }
 
-Status VersionSet::DropColumnFamilies(const std::vector<uint32_t>& column_families, SequenceNumber obsolete_sequence) {
+Status VersionSet::DropColumnFamilies(
+    const std::vector<uint32_t>& column_families,
+    SequenceNumber obsolete_sequence) {
   Status s;
   for (auto& cf_id : column_families) {
     auto it = column_families_.find(cf_id);
     if (it != column_families_.end()) {
       VersionEdit edit;
       edit.SetColumnFamilyID(it->first);
-      for (auto& file: it->second->files_) {
+      for (auto& file : it->second->files_) {
         ROCKS_LOG_INFO(db_options_.info_log, "Titan add obsolete file [%llu]",
-          file.second->file_number());
+                       file.second->file_number());
         edit.DeleteBlobFile(file.first, obsolete_sequence);
       }
       s = LogAndApply(&edit);
       if (!s.ok()) return s;
     } else {
-      ROCKS_LOG_ERROR(db_options_.info_log, 
-        "column %u not found for drop\n", cf_id);
+      ROCKS_LOG_ERROR(db_options_.info_log, "column %u not found for drop\n",
+                      cf_id);
       return Status::NotFound("invalid column family");
     }
     obsolete_columns_.insert(cf_id);
-  }  
-  return s; 
+  }
+  return s;
 }
 
 Status VersionSet::DestroyColumnFamily(uint32_t cf_id) {
@@ -292,25 +299,27 @@ Status VersionSet::DestroyColumnFamily(uint32_t cf_id) {
     }
     return Status::OK();
   }
-  ROCKS_LOG_ERROR(db_options_.info_log, 
-    "column %u not found for destroy\n", cf_id);
+  ROCKS_LOG_ERROR(db_options_.info_log, "column %u not found for destroy\n",
+                  cf_id);
   return Status::NotFound("invalid column family");
 }
 
-void VersionSet::GetObsoleteFiles(std::vector<std::string>* obsolete_files, SequenceNumber oldest_sequence) {
+void VersionSet::GetObsoleteFiles(std::vector<std::string>* obsolete_files,
+                                  SequenceNumber oldest_sequence) {
   for (auto it = column_families_.begin(); it != column_families_.end();) {
     auto& cf_id = it->first;
     auto& blob_storage = it->second;
-    // In the case of dropping column family, obsolete blob files can be deleted only
-    // after the column family handle is destroyed.
+    // In the case of dropping column family, obsolete blob files can be deleted
+    // only after the column family handle is destroyed.
     if (obsolete_columns_.find(cf_id) != obsolete_columns_.end()) {
       ++it;
       continue;
     }
 
     blob_storage->GetObsoleteFiles(obsolete_files, oldest_sequence);
-    
-    // Cleanup obsolete column family when all the blob files for that are deleted.
+
+    // Cleanup obsolete column family when all the blob files for that are
+    // deleted.
     if (blob_storage->MaybeRemove()) {
       it = column_families_.erase(it);
       continue;
@@ -318,7 +327,8 @@ void VersionSet::GetObsoleteFiles(std::vector<std::string>* obsolete_files, Sequ
     ++it;
   }
 
-  obsolete_files->insert(obsolete_files->end(), obsolete_manifests_.begin(), obsolete_manifests_.end());
+  obsolete_files->insert(obsolete_files->end(), obsolete_manifests_.begin(),
+                         obsolete_manifests_.end());
   obsolete_manifests_.clear();
 }
 

src/version_set.h

@@ -5,16 +5,16 @@
 #include <unordered_map>
 #include <unordered_set>
 
+#include "blob_file_cache.h"
+#include "blob_storage.h"
 #include "db/log_reader.h"
 #include "db/log_writer.h"
 #include "port/port_posix.h"
 #include "rocksdb/options.h"
 #include "rocksdb/status.h"
-#include "util/mutexlock.h"
-#include "blob_file_cache.h"
 #include "titan/options.h"
+#include "util/mutexlock.h"
 #include "version_edit.h"
-#include "blob_storage.h"
 
 namespace rocksdb {
 namespace titandb {
@@ -43,7 +43,8 @@ class VersionSet {
   // Drops some column families. The obsolete files will be deleted in
   // background when they will not be accessed anymore.
   // REQUIRES: mutex is held
-  Status DropColumnFamilies(const std::vector<uint32_t>& handles, SequenceNumber obsolete_sequence);
+  Status DropColumnFamilies(const std::vector<uint32_t>& handles,
+                            SequenceNumber obsolete_sequence);
 
   // Destroy the column family. Only after this is called, the obsolete files
   // of the dropped column family can be physical deleted.
@@ -63,7 +64,8 @@ class VersionSet {
   }
 
   // REQUIRES: mutex is held
-  void GetObsoleteFiles(std::vector<std::string>* obsolete_files, SequenceNumber oldest_sequence);
+  void GetObsoleteFiles(std::vector<std::string>* obsolete_files,
+                        SequenceNumber oldest_sequence);
 
   // REQUIRES: mutex is held
   void MarkAllFilesForGC() {
@@ -71,6 +73,7 @@ class VersionSet {
       cf.second->MarkAllFilesForGC();
     }
   }
+
  private:
   friend class BlobFileSizeCollectorTest;
   friend class VersionTest;
@@ -80,7 +83,7 @@ class VersionSet {
   Status OpenManifest(uint64_t number);
 
   Status WriteSnapshot(log::Writer* log);
-  
+
   Status Apply(VersionEdit* edit);
 
   std::string dirname_;
@@ -91,10 +94,12 @@ class VersionSet {
 
   std::vector<std::string> obsolete_manifests_;
 
-  // As rocksdb described, `DropColumnFamilies()` only records the drop of the column family specified by ColumnFamilyHandle.
-  // The actual data is not deleted until the client calls `delete column_family`, namely `DestroyColumnFamilyHandle()`.
-  // We can still continue using the column family if we have outstanding ColumnFamilyHandle pointer.
-  // So here record the dropped column family but the handler is not destroyed.
+  // As rocksdb described, `DropColumnFamilies()` only records the drop of the
+  // column family specified by ColumnFamilyHandle. The actual data is not
+  // deleted until the client calls `delete column_family`, namely
+  // `DestroyColumnFamilyHandle()`. We can still continue using the column
+  // family if we have outstanding ColumnFamilyHandle pointer. So here record
+  // the dropped column family but the handler is not destroyed.
   std::unordered_set<uint32_t> obsolete_columns_;
 
   std::unordered_map<uint32_t, std::shared_ptr<BlobStorage>> column_families_;

src/version_test.cc

-#include "util/filename.h"
-#include "util/testharness.h"
 #include "testutil.h"
 #include "util.h"
+#include "util/filename.h"
+#include "util/testharness.h"
 #include "version_edit.h"
 #include "version_set.h"
 
@@ -82,7 +82,7 @@ class VersionTest : public testing::Test {
       auto& storage = column_families_[it.first];
       // ignore obsolete file
       auto size = 0;
-      for (auto& file: it.second->files_) {
+      for (auto& file : it.second->files_) {
         if (!file.second->is_obsolete()) {
           size++;
         }
@@ -198,7 +198,7 @@ TEST_F(VersionTest, ObsoleteFiles) {
   std::vector<uint32_t> cfs = {1};
   ASSERT_OK(vset_->DropColumnFamilies(cfs, 0));
   vset_->GetObsoleteFiles(&of, kMaxSequenceNumber);
-  ASSERT_EQ(of.size(), 1);  
+  ASSERT_EQ(of.size(), 1);
   CheckColumnFamiliesSize(10);
 
   ASSERT_OK(vset_->DestroyColumnFamily(1));