refactor(absl): Use the abseil in thirdparty instead of the internal copied one (#1694)

For historical reasons, we copied some Abeil-cpp code into Pegasus to use
features like string_view, make_unique, apply and etc. The Abeil library
has been introduced into Pegasus as a thirdparty in previous patches, so
we can use it directly.
This patch has the following changes:
- Remove the abseil files copied to Pegasus including:
  - src/utils/absl/base/internal/invoke.h
  - src/utils/absl/utility/utility.h
  - src/utils/memutil.h
  - src/utils/smart_pointers.h
  - src/utils/string_view.cpp
  - src/utils/string_view.h
  - src/utils/test/memutil_test.cpp
  - src/utils/test/smart_pointers_test.cpp
  - src/utils/test/string_view_test.cpp
- Update license related files(.licenserc.yaml and LICENSE)
- Use std::make_unique explicitly.
- Add a function to_string_view(), then dsn::blob is possible to
  transfer to absl::string_view.

Author: acelyc111

.licenserc.yaml

@@ -103,16 +103,6 @@ header:
     - 'src/utils/test/autoref_ptr_test.cpp'
     # Copyright (c) 2006-2009 The Chromium Authors
     - 'src/utils/safe_strerror_posix.cpp'
-    # Copyright 2017 The Abseil Authors
-    - 'src/utils/absl/base/internal/invoke.h'
-    - 'src/utils/absl/utility/utility.h'
-    - 'src/utils/memutil.h'
-    - 'src/utils/smart_pointers.h'
-    - 'src/utils/string_view.cpp'
-    - 'src/utils/string_view.h'
-    - 'src/utils/test/memutil_test.cpp'
-    - 'src/utils/test/smart_pointers_test.cpp'
-    - 'src/utils/test/string_view_test.cpp'
     # Copyright (c) 2010-2011, Rob Jansen
     - 'cmake_modules/FindRT.cmake'
     - 'cmake_modules/FindDL.cmake'

LICENSE

@@ -360,32 +360,6 @@ src/shell/argh.h - BSD-3-Clause License
 
 --------------------------------------------------------------------------------
 
-src/utils/absl/base/internal/invoke.h - Apache 2.0 License
-src/utils/absl/utility/utility.h
-src/utils/memutil.h
-src/utils/smart_pointers.h
-src/utils/string_view.cpp
-src/utils/string_view.h
-src/utils/test/memutil_test.cpp
-src/utils/test/smart_pointers_test.cpp
-src/utils/test/string_view_test.cpp
-
-Copyright 2017 The Abseil Authors.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-     http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-
---------------------------------------------------------------------------------
-
 src/utils/safe_strerror_posix.cpp - BSD-3-Clause License
 
 Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.

src/base/pegasus_utils.h

@@ -29,7 +29,7 @@
 #include <vector>
 
 #include "utils/flags.h"
-#include "utils/string_view.h"
+#include "absl/strings/string_view.h"
 
 DSN_DECLARE_bool(encrypt_data_at_rest);
 
@@ -129,9 +129,9 @@ const std::string &redact_sensitive_string(const T &src)
     }
 }
 
-inline dsn::string_view to_string_view(rocksdb::Slice s) { return {s.data(), s.size()}; }
+inline absl::string_view to_string_view(rocksdb::Slice s) { return {s.data(), s.size()}; }
 
-inline rocksdb::Slice to_rocksdb_slice(dsn::string_view s) { return {s.data(), s.size()}; }
+inline rocksdb::Slice to_rocksdb_slice(absl::string_view s) { return {s.data(), s.size()}; }
 
 } // namespace utils
 } // namespace pegasus

src/base/pegasus_value_schema.h

@@ -32,7 +32,7 @@
 #include "utils/blob.h"
 #include "utils/endians.h"
 #include "utils/fmt_logging.h"
-#include "utils/string_view.h"
+#include "absl/strings/string_view.h"
 #include "value_field.h"
 
 namespace pegasus {
@@ -55,7 +55,7 @@ inline uint64_t extract_timestamp_from_timetag(uint64_t timetag)
 /// Extracts expire_ts from rocksdb value with given version.
 /// The value schema must be in v0 or v1.
 /// \return expire_ts in host endian
-inline uint32_t pegasus_extract_expire_ts(uint32_t version, dsn::string_view value)
+inline uint32_t pegasus_extract_expire_ts(uint32_t version, absl::string_view value)
 {
     CHECK_LE(version, PEGASUS_DATA_VERSION_MAX);
     return dsn::data_input(value).read_u32();
@@ -76,15 +76,15 @@ pegasus_extract_user_data(uint32_t version, std::string &&raw_value, ::dsn::blob
     if (version == 1) {
         input.skip(sizeof(uint64_t));
     }
-    dsn::string_view view = input.read_str();
+    absl::string_view view = input.read_str();
 
     // tricky code to avoid memory copy
     std::shared_ptr<char> buf(const_cast<char *>(view.data()), [s](char *) { delete s; });
     user_data.assign(std::move(buf), 0, static_cast<unsigned int>(view.length()));
 }
 
 /// Extracts timetag from a v1 value.
-inline uint64_t pegasus_extract_timetag(int version, dsn::string_view value)
+inline uint64_t pegasus_extract_timetag(int version, absl::string_view value)
 {
     CHECK_EQ(version, 1);
 
@@ -118,7 +118,7 @@ inline bool check_if_ts_expired(uint32_t epoch_now, uint32_t expire_ts)
 /// \return true if expired
 inline bool check_if_record_expired(uint32_t value_schema_version,
                                     uint32_t epoch_now,
-                                    dsn::string_view raw_value)
+                                    absl::string_view raw_value)
 {
     return check_if_ts_expired(epoch_now,
                                pegasus_extract_expire_ts(value_schema_version, raw_value));
@@ -136,7 +136,7 @@ class pegasus_value_generator
     /// A higher level utility for generating value with given version.
     /// The value schema must be in v0 or v1.
     rocksdb::SliceParts generate_value(uint32_t value_schema_version,
-                                       dsn::string_view user_data,
+                                       absl::string_view user_data,
                                        uint32_t expire_ts,
                                        uint64_t timetag)
     {
@@ -157,7 +157,7 @@ class pegasus_value_generator
     ///
     /// rocksdb value (ver 0) = [expire_ts(uint32_t)] [user_data(bytes)]
     /// \internal
-    rocksdb::SliceParts generate_value_v0(uint32_t expire_ts, dsn::string_view user_data)
+    rocksdb::SliceParts generate_value_v0(uint32_t expire_ts, absl::string_view user_data)
     {
         _write_buf.resize(sizeof(uint32_t));
         _write_slices.clear();
@@ -210,7 +210,7 @@ class pegasus_value_generator
     ///
     /// \internal
     rocksdb::SliceParts
-    generate_value_v1(uint32_t expire_ts, uint64_t timetag, dsn::string_view user_data)
+    generate_value_v1(uint32_t expire_ts, uint64_t timetag, absl::string_view user_data)
     {
         _write_buf.resize(sizeof(uint32_t) + sizeof(uint64_t));
         _write_slices.clear();
@@ -258,7 +258,7 @@ class value_schema
 public:
     virtual ~value_schema() = default;
 
-    virtual std::unique_ptr<value_field> extract_field(dsn::string_view value,
+    virtual std::unique_ptr<value_field> extract_field(absl::string_view value,
                                                        value_field_type type) = 0;
     /// Extracts user value from the raw rocksdb value.
     /// In order to avoid data copy, the ownership of `raw_value` will be transferred

src/base/test/value_manager_test.cpp

@@ -23,15 +23,15 @@
 #include "base/value_schema_manager.h"
 #include "gtest/gtest.h"
 #include "pegasus_value_schema.h"
-#include "utils/string_view.h"
+#include "absl/strings/string_view.h"
 #include "value_field.h"
 
 using namespace pegasus;
 
 extern std::string generate_value(value_schema *schema,
                                   uint32_t expire_ts,
                                   uint64_t time_tag,
-                                  dsn::string_view user_data);
+                                  absl::string_view user_data);
 
 TEST(value_schema_manager, get_latest_value_schema)
 {

src/base/test/value_schema_test.cpp

@@ -30,7 +30,7 @@
 #include "base/value_schema_manager.h"
 #include "gtest/gtest.h"
 #include "utils/blob.h"
-#include "utils/string_view.h"
+#include "absl/strings/string_view.h"
 #include "value_field.h"
 
 using namespace pegasus;
@@ -52,7 +52,7 @@ uint64_t extract_time_tag(value_schema *schema, const std::string &raw_value)
 std::string generate_value(value_schema *schema,
                            uint32_t expire_ts,
                            uint64_t time_tag,
-                           dsn::string_view user_data)
+                           absl::string_view user_data)
 {
     std::string write_buf;
     std::vector<rocksdb::Slice> write_slices;

src/base/value_field.h

@@ -56,9 +56,9 @@ struct time_tag_field : public value_field
 
 struct user_data_field : public value_field
 {
-    explicit user_data_field(dsn::string_view data) : user_data(data) {}
+    explicit user_data_field(absl::string_view data) : user_data(data) {}
     value_field_type type() { return value_field_type::USER_DATA; }
 
-    dsn::string_view user_data;
+    absl::string_view user_data;
 };
 } // namespace pegasus

src/base/value_schema_manager.cpp

@@ -19,6 +19,7 @@
 
 #include "value_schema_manager.h"
 
+#include <absl/strings/string_view.h>
 #include <iterator>
 #include <utility>
 
@@ -46,7 +47,7 @@ void value_schema_manager::register_schema(std::unique_ptr<value_schema> schema)
 }
 
 value_schema *value_schema_manager::get_value_schema(uint32_t meta_cf_data_version,
-                                                     dsn::string_view value) const
+                                                     absl::string_view value) const
 {
     dsn::data_input input(value);
     uint8_t first_byte = input.read_u8();

src/base/value_schema_manager.h

@@ -25,7 +25,7 @@
 
 #include "pegasus_value_schema.h"
 #include "utils/singleton.h"
-#include "utils/string_view.h"
+#include "absl/strings/string_view.h"
 
 namespace pegasus {
 
@@ -35,7 +35,7 @@ class value_schema_manager : public dsn::utils::singleton<value_schema_manager>
     void register_schema(std::unique_ptr<value_schema> schema);
     /// using the raw value in rocksdb and data version stored in meta column family to get data
     /// version
-    value_schema *get_value_schema(uint32_t meta_cf_data_version, dsn::string_view value) const;
+    value_schema *get_value_schema(uint32_t meta_cf_data_version, absl::string_view value) const;
     value_schema *get_value_schema(uint32_t version) const;
     value_schema *get_latest_value_schema() const;
 

src/base/value_schema_v0.cpp

@@ -19,6 +19,7 @@
 
 #include "value_schema_v0.h"
 
+#include <absl/strings/string_view.h>
 #include <stdint.h>
 #include <string.h>
 #include <algorithm>
@@ -31,7 +32,7 @@
 #include "utils/ports.h"
 
 namespace pegasus {
-std::unique_ptr<value_field> value_schema_v0::extract_field(dsn::string_view value,
+std::unique_ptr<value_field> value_schema_v0::extract_field(absl::string_view value,
                                                             value_field_type type)
 {
     std::unique_ptr<value_field> field = nullptr;
@@ -79,14 +80,14 @@ rocksdb::SliceParts value_schema_v0::generate_value(const value_params &params)
     params.write_slices.clear();
     params.write_slices.emplace_back(params.write_buf.data(), params.write_buf.size());
 
-    dsn::string_view user_data = data_field->user_data;
+    absl::string_view user_data = data_field->user_data;
     if (user_data.length() > 0) {
         params.write_slices.emplace_back(user_data.data(), user_data.length());
     }
     return {&params.write_slices[0], static_cast<int>(params.write_slices.size())};
 }
 
-std::unique_ptr<value_field> value_schema_v0::extract_timestamp(dsn::string_view value)
+std::unique_ptr<value_field> value_schema_v0::extract_timestamp(absl::string_view value)
 {
     uint32_t expire_ts = dsn::data_input(value).read_u32();
     return std::make_unique<expire_timestamp_field>(expire_ts);

src/base/value_schema_v0.h

@@ -25,7 +25,7 @@
 
 #include "pegasus_value_schema.h"
 #include "utils/blob.h"
-#include "utils/string_view.h"
+#include "absl/strings/string_view.h"
 #include "value_field.h"
 
 namespace pegasus {
@@ -37,15 +37,15 @@ class value_schema_v0 : public value_schema
 public:
     value_schema_v0() = default;
 
-    std::unique_ptr<value_field> extract_field(dsn::string_view value,
+    std::unique_ptr<value_field> extract_field(absl::string_view value,
                                                value_field_type type) override;
     dsn::blob extract_user_data(std::string &&value) override;
     void update_field(std::string &value, std::unique_ptr<value_field> field) override;
     rocksdb::SliceParts generate_value(const value_params &params) override;
     data_version version() const override { return data_version::VERSION_0; }
 
 private:
-    std::unique_ptr<value_field> extract_timestamp(dsn::string_view value);
+    std::unique_ptr<value_field> extract_timestamp(absl::string_view value);
     void update_expire_ts(std::string &value, std::unique_ptr<value_field> field);
 };
 } // namespace pegasus

src/base/value_schema_v1.cpp

@@ -19,6 +19,7 @@
 
 #include "value_schema_v1.h"
 
+#include <absl/strings/string_view.h>
 #include <stdint.h>
 #include <string.h>
 #include <algorithm>
@@ -31,7 +32,7 @@
 #include "utils/ports.h"
 
 namespace pegasus {
-std::unique_ptr<value_field> value_schema_v1::extract_field(dsn::string_view value,
+std::unique_ptr<value_field> value_schema_v1::extract_field(absl::string_view value,
                                                             value_field_type type)
 {
     std::unique_ptr<value_field> field = nullptr;
@@ -87,20 +88,20 @@ rocksdb::SliceParts value_schema_v1::generate_value(const value_params &params)
     params.write_slices.clear();
     params.write_slices.emplace_back(params.write_buf.data(), params.write_buf.size());
 
-    dsn::string_view user_data = data_field->user_data;
+    absl::string_view user_data = data_field->user_data;
     if (user_data.length() > 0) {
         params.write_slices.emplace_back(user_data.data(), user_data.length());
     }
     return {&params.write_slices[0], static_cast<int>(params.write_slices.size())};
 }
 
-std::unique_ptr<value_field> value_schema_v1::extract_timestamp(dsn::string_view value)
+std::unique_ptr<value_field> value_schema_v1::extract_timestamp(absl::string_view value)
 {
     uint32_t expire_ts = dsn::data_input(value).read_u32();
     return std::make_unique<expire_timestamp_field>(expire_ts);
 }
 
-std::unique_ptr<value_field> value_schema_v1::extract_time_tag(dsn::string_view value)
+std::unique_ptr<value_field> value_schema_v1::extract_time_tag(absl::string_view value)
 {
     dsn::data_input input(value);
     input.skip(sizeof(uint32_t));

src/base/value_schema_v1.h

@@ -25,7 +25,7 @@
 
 #include "pegasus_value_schema.h"
 #include "utils/blob.h"
-#include "utils/string_view.h"
+#include "absl/strings/string_view.h"
 #include "value_field.h"
 
 namespace pegasus {
@@ -37,16 +37,16 @@ class value_schema_v1 : public value_schema
 public:
     value_schema_v1() = default;
 
-    std::unique_ptr<value_field> extract_field(dsn::string_view value,
+    std::unique_ptr<value_field> extract_field(absl::string_view value,
                                                value_field_type type) override;
     dsn::blob extract_user_data(std::string &&value) override;
     void update_field(std::string &value, std::unique_ptr<value_field> field) override;
     rocksdb::SliceParts generate_value(const value_params &params) override;
     data_version version() const override { return data_version::VERSION_1; }
 
 private:
-    std::unique_ptr<value_field> extract_timestamp(dsn::string_view value);
-    std::unique_ptr<value_field> extract_time_tag(dsn::string_view value);
+    std::unique_ptr<value_field> extract_timestamp(absl::string_view value);
+    std::unique_ptr<value_field> extract_time_tag(absl::string_view value);
     void update_expire_ts(std::string &value, std::unique_ptr<value_field> field);
 };