feat(clp-s): Add the write path for single-file archives.

components/core/src/clp_s/ArchiveWriter.cpp

@@ -1,6 +1,8 @@
 #include "ArchiveWriter.hpp"
 
 #include <algorithm>
+#include <filesystem>
+#include <sstream>
 
 #include <json/single_include/nlohmann/json.hpp>
 
@@ -13,18 +15,23 @@ void ArchiveWriter::open(ArchiveWriterOption const& option) {
     m_id = boost::uuids::to_string(option.id);
     m_compression_level = option.compression_level;
     m_print_archive_stats = option.print_archive_stats;
+    m_single_file_archive = option.single_file_archive;
     m_min_table_size = option.min_table_size;
-    auto archive_path = boost::filesystem::path(option.archives_dir) / m_id;
+    m_archives_dir = option.archives_dir;
+    std::string working_dir_name = m_id;
+    if (option.single_file_archive) {
+        working_dir_name += constants::cTmpPostfix;
+    }
+    auto archive_path = std::filesystem::path(option.archives_dir) / working_dir_name;
 
-    boost::system::error_code boost_error_code;
-    bool path_exists = boost::filesystem::exists(archive_path, boost_error_code);
-    if (path_exists) {
+    std::error_code ec;
+    if (std::filesystem::exists(archive_path, ec)) {
         SPDLOG_ERROR("Archive path already exists: {}", archive_path.c_str());
         throw OperationFailed(ErrorCodeUnsupported, __FILENAME__, __LINE__);
     }
 
     m_archive_path = archive_path.string();
-    if (false == boost::filesystem::create_directory(m_archive_path)) {
+    if (false == std::filesystem::create_directory(m_archive_path, ec)) {
         throw OperationFailed(ErrorCodeErrno, __FILENAME__, __LINE__);
     }
 
@@ -39,20 +46,42 @@ void ArchiveWriter::open(ArchiveWriterOption const& option) {
     std::string array_dict_path = m_archive_path + constants::cArchiveArrayDictFile;
     m_array_dict = std::make_shared<LogTypeDictionaryWriter>();
     m_array_dict->open(array_dict_path, m_compression_level, UINT64_MAX);
-
-    std::string timestamp_dict_path = m_archive_path + constants::cArchiveTimestampDictFile;
-    m_timestamp_dict = std::make_shared<TimestampDictionaryWriter>();
-    m_timestamp_dict->open(timestamp_dict_path, m_compression_level);
 }
 
 void ArchiveWriter::close() {
-    m_compressed_size += m_var_dict->close();
-    m_compressed_size += m_log_dict->close();
-    m_compressed_size += m_array_dict->close();
-    m_compressed_size += m_timestamp_dict->close();
-    m_compressed_size += m_schema_tree.store(m_archive_path, m_compression_level);
-    m_compressed_size += m_schema_map.store(m_archive_path, m_compression_level);
-    m_compressed_size += store_tables();
+    auto var_dict_compressed_size = m_var_dict->close();
+    auto log_dict_compressed_size = m_log_dict->close();
+    auto array_dict_compressed_size = m_array_dict->close();
+    auto schema_tree_compressed_size = m_schema_tree.store(m_archive_path, m_compression_level);
+    auto schema_map_compressed_size = m_schema_map.store(m_archive_path, m_compression_level);
+    auto [table_metadata_compressed_size, table_compressed_size] = store_tables();
+
+    if (m_single_file_archive) {
+        std::vector<ArchiveFileInfo> files{
+                {constants::cArchiveSchemaTreeFile, schema_tree_compressed_size},
+                {constants::cArchiveSchemaMapFile, schema_map_compressed_size},
+                {constants::cArchiveTableMetadataFile, table_metadata_compressed_size},
+                {constants::cArchiveVarDictFile, var_dict_compressed_size},
+                {constants::cArchiveLogDictFile, log_dict_compressed_size},
+                {constants::cArchiveArrayDictFile, array_dict_compressed_size},
+                {constants::cArchiveTablesFile, table_compressed_size}
+        };
+        uint64_t offset = 0;
+        for (auto& file : files) {
+            uint64_t original_size = file.o;
+            file.o = offset;
+            offset += original_size;
+        }
+        write_single_file_archive(files);
+    } else {
+        // Timestamp dictionary written separately here until we transition to moving it inside of
+        // the metadata region of multi-file archives.
+        auto timestamp_dict_compressed_size = write_timestamp_dict();
+        m_compressed_size = var_dict_compressed_size + log_dict_compressed_size
+                            + array_dict_compressed_size + timestamp_dict_compressed_size
+                            + schema_tree_compressed_size + schema_map_compressed_size
+                            + table_metadata_compressed_size + table_compressed_size;
+    }
 
     if (m_metadata_db) {
         update_metadata_db();
@@ -65,12 +94,130 @@ void ArchiveWriter::close() {
     m_id_to_schema_writer.clear();
     m_schema_tree.clear();
     m_schema_map.clear();
+    m_timestamp_dict.clear();
     m_encoded_message_size = 0UL;
     m_uncompressed_size = 0UL;
     m_compressed_size = 0UL;
     m_next_log_event_id = 0;
 }
 
+size_t ArchiveWriter::write_timestamp_dict() {
+    std::string timestamp_dict_path = m_archive_path + constants::cArchiveTimestampDictFile;
+    FileWriter timestamp_dict_file_writer;
+    ZstdCompressor timestamp_dict_compressor;
+    timestamp_dict_file_writer.open(timestamp_dict_path, FileWriter::OpenMode::CreateForWriting);
+    timestamp_dict_compressor.open(timestamp_dict_file_writer, m_compression_level);
+    std::stringstream timestamp_dict_stream;
+    m_timestamp_dict.write(timestamp_dict_stream);
+    std::string encoded_timestamp_dict = timestamp_dict_stream.str();
+    timestamp_dict_compressor.write(encoded_timestamp_dict.data(), encoded_timestamp_dict.size());
+    timestamp_dict_compressor.close();
+    auto compressed_size = timestamp_dict_file_writer.get_pos();
+    timestamp_dict_file_writer.close();
+    return compressed_size;
+}
+
+void ArchiveWriter::write_single_file_archive(std::vector<ArchiveFileInfo> const& files) {
+    std::string single_file_archive_path = (std::filesystem::path(m_archives_dir) / m_id).string();
+    FileWriter archive_writer;
+    archive_writer.open(single_file_archive_path, FileWriter::OpenMode::CreateForWriting);
+
+    write_archive_metadata(archive_writer, files);
+    size_t metadata_section_size = archive_writer.get_pos() - sizeof(ArchiveHeader);
+    write_archive_files(archive_writer, files);
+    m_compressed_size = archive_writer.get_pos();
+    write_archive_header(archive_writer, metadata_section_size);
+
+    archive_writer.close();
+    std::error_code ec;
+    if (false == std::filesystem::remove(m_archive_path, ec)) {
+        throw OperationFailed(ErrorCodeFileExists, __FILENAME__, __LINE__);
+    }
+}
+
+void ArchiveWriter::write_archive_metadata(
+        FileWriter& archive_writer,
+        std::vector<ArchiveFileInfo> const& files
+) {
+    archive_writer.seek_from_begin(sizeof(ArchiveHeader));
+
+    ZstdCompressor compressor;
+    compressor.open(archive_writer, m_compression_level);
+    compressor.write_numeric_value(static_cast<uint8_t>(3U));  // Number of packets
+
+    // Write archive info
+    ArchiveInfoPacket archive_info{.num_segments = 1};
+    std::stringstream msgpack_buffer;
+    msgpack::pack(msgpack_buffer, archive_info);
+    std::string archive_info_str = msgpack_buffer.str();
+    compressor.write_numeric_value(ArchiveMetadataPacketType::ArchiveInfo);
+    compressor.write_numeric_value(static_cast<uint32_t>(archive_info_str.size()));
+    compressor.write_string(archive_info_str);
+
+    // Write archive file info
+    ArchiveFileInfoPacket archive_file_info{.files{files}};
+    msgpack_buffer = std::stringstream{};
+    msgpack::pack(msgpack_buffer, archive_file_info);
+    std::string archive_file_info_str = msgpack_buffer.str();
+    compressor.write_numeric_value(ArchiveMetadataPacketType::ArchiveFileInfo);
+    compressor.write_numeric_value(static_cast<uint32_t>(archive_file_info_str.size()));
+    compressor.write_string(archive_file_info_str);
+
+    // Write timestamp dictionary
+    compressor.write_numeric_value(ArchiveMetadataPacketType::TimestampDictionary);
+    std::stringstream timestamp_dict_stream;
+    m_timestamp_dict.write(timestamp_dict_stream);
+    std::string encoded_timestamp_dict = timestamp_dict_stream.str();
+    compressor.write_numeric_value(static_cast<uint32_t>(encoded_timestamp_dict.size()));
+    compressor.write(encoded_timestamp_dict.data(), encoded_timestamp_dict.size());
+
+    compressor.close();
+}
+
+void ArchiveWriter::write_archive_files(
+        FileWriter& archive_writer,
+        std::vector<ArchiveFileInfo> const& files
+) {
+    FileReader reader;
+    for (auto const& file : files) {
+        std::string file_path = m_archive_path + file.n;
+        reader.open(file_path);
+        char read_buffer[cReadBlockSize];
+        while (true) {
+            size_t num_bytes_read{0};
+            ErrorCode const error_code
+                    = reader.try_read(read_buffer, cReadBlockSize, num_bytes_read);
+            if (ErrorCodeEndOfFile == error_code) {
+                break;
+            } else if (ErrorCodeSuccess != error_code) {
+                throw OperationFailed(error_code, __FILENAME__, __LINE__);
+            }
+            archive_writer.write(read_buffer, num_bytes_read);
+        }
+        reader.close();
+        if (false == std::filesystem::remove(file_path)) {
+            throw OperationFailed(ErrorCodeFileExists, __FILENAME__, __LINE__);
+        }
+    }
+}
+
+void ArchiveWriter::write_archive_header(FileWriter& archive_writer, size_t metadata_section_size) {
+    ArchiveHeader header{
+            .magic_number{0},
+            .version
+            = (cArchiveMajorVersion << 24) | (cArchiveMinorVersion << 16) | cArchivePatchVersion,
+            .uncompressed_size = m_uncompressed_size,
+            .compressed_size = m_compressed_size,
+            .reserved_padding{0},
+            .metadata_section_size = static_cast<uint32_t>(metadata_section_size),
+            .compression_type = static_cast<uint16_t>(ArchiveCompressionType::Zstd),
+            .padding = 0
+    };
+    std::memcpy(&header.magic_number, cStructuredSFAMagicNumber, sizeof(header.magic_number));
+    archive_writer.seek_from_begin(0);
+    archive_writer.write(reinterpret_cast<char const*>(&header), sizeof(header));
+}
+
 void ArchiveWriter::append_message(
         int32_t schema_id,
         Schema const& schema,
@@ -132,8 +279,7 @@ void ArchiveWriter::initialize_schema_writer(SchemaWriter* writer, Schema const&
     }
 }
 
-size_t ArchiveWriter::store_tables() {
-    size_t compressed_size = 0;
+std::pair<size_t, size_t> ArchiveWriter::store_tables() {
     m_tables_file_writer.open(
             m_archive_path + constants::cArchiveTablesFile,
             FileWriter::OpenMode::CreateForWriting
@@ -243,13 +389,13 @@ size_t ArchiveWriter::store_tables() {
     }
     m_table_metadata_compressor.close();
 
-    compressed_size += m_table_metadata_file_writer.get_pos();
-    compressed_size += m_tables_file_writer.get_pos();
+    auto table_metadata_compressed_size = m_table_metadata_file_writer.get_pos();
+    auto table_compressed_size = m_tables_file_writer.get_pos();
 
     m_table_metadata_file_writer.close();
     m_tables_file_writer.close();
 
-    return compressed_size;
+    return {table_metadata_compressed_size, table_compressed_size};
 }
 
 void ArchiveWriter::update_metadata_db() {
@@ -262,8 +408,8 @@ void ArchiveWriter::update_metadata_db() {
     metadata.increment_static_compressed_size(m_compressed_size);
     metadata.increment_static_uncompressed_size(m_uncompressed_size);
     metadata.expand_time_range(
-            m_timestamp_dict->get_begin_timestamp(),
-            m_timestamp_dict->get_end_timestamp()
+            m_timestamp_dict.get_begin_timestamp(),
+            m_timestamp_dict.get_end_timestamp()
     );
 
     m_metadata_db->add_archive(m_id, metadata);

components/core/src/clp_s/ArchiveWriter.hpp

@@ -14,6 +14,7 @@
 #include "SchemaMap.hpp"
 #include "SchemaTree.hpp"
 #include "SchemaWriter.hpp"
+#include "SingleFileArchiveDefs.hpp"
 #include "TimestampDictionaryWriter.hpp"
 
 namespace clp_s {
@@ -22,6 +23,7 @@ struct ArchiveWriterOption {
     std::string archives_dir;
     int compression_level;
     bool print_archive_stats;
+    bool single_file_archive;
     size_t min_table_size;
 };
 
@@ -125,7 +127,7 @@ class ArchiveWriter {
             std::string const& timestamp,
             uint64_t& pattern_id
     ) {
-        return m_timestamp_dict->ingest_entry(key, node_id, timestamp, pattern_id);
+        return m_timestamp_dict.ingest_entry(key, node_id, timestamp, pattern_id);
     }
 
     /**
@@ -135,21 +137,24 @@ class ArchiveWriter {
      * @param timestamp
      */
     void ingest_timestamp_entry(std::string const& key, int32_t node_id, double timestamp) {
-        m_timestamp_dict->ingest_entry(key, node_id, timestamp);
+        m_timestamp_dict.ingest_entry(key, node_id, timestamp);
     }
 
     void ingest_timestamp_entry(std::string const& key, int32_t node_id, int64_t timestamp) {
-        m_timestamp_dict->ingest_entry(key, node_id, timestamp);
+        m_timestamp_dict.ingest_entry(key, node_id, timestamp);
     }
 
     /**
-     * Increments the size of the compressed data written to the archive
+     * Increments the size of the original (uncompressed) logs ingested into the archive. This size
+     * tracks the raw input size before any encoding or compression.
      * @param size
      */
     void increment_uncompressed_size(size_t size) { m_uncompressed_size += size; }
 
     /**
-     * @return Size of the uncompressed data written to the archive
+     * @return The total size of the encoded (uncompressed) data written to the archive. This
+     * reflects the size of the data after encoding but before compression.
+     * TODO: Add the size of schema tree, schema map and timestamp dictionary
      */
     size_t get_data_size();
 
@@ -162,10 +167,40 @@ class ArchiveWriter {
     void initialize_schema_writer(SchemaWriter* writer, Schema const& schema);
 
     /**
-     * Stores the tables
-     * @return Size of the compressed data in bytes
+     * Compresses and stores the tables.
+     * @return A pair containing:
+     *         - The size of the compressed table metadata in bytes.
+     *         - The size of the compressed tables in bytes.
      */
-    [[nodiscard]] size_t store_tables();
+    [[nodiscard]] std::pair<size_t, size_t> store_tables();
+
+    /**
+     * Writes the archive to a single file
+     * @param files
+     */
+    void write_single_file_archive(std::vector<ArchiveFileInfo> const& files);
+
+    /**
+     * Writes the metadata section of the single file archive
+     * @param archive_writer
+     * @param files
+     */
+    void
+    write_archive_metadata(FileWriter& archive_writer, std::vector<ArchiveFileInfo> const& files);
+
+    /**
+     * Writes the file section of the single file archive
+     * @param archive_writer
+     * @param files
+     */
+    void write_archive_files(FileWriter& archive_writer, std::vector<ArchiveFileInfo> const& files);
+
+    /**
+     * Writes the header section of the single file archive
+     * @param archive_writer
+     * @param metadata_section_size
+     */
+    void write_archive_header(FileWriter& archive_writer, size_t metadata_section_size);
 
     /**
      * Updates the metadata db with the archive's metadata (id, size, timestamp ranges, etc.)
@@ -177,23 +212,36 @@ class ArchiveWriter {
      */
     void print_archive_stats();
 
+    /**
+     * Write the timestamp dictionary as a dedicated file for multi-file archives.
+     *
+     * Note: the timestamp dictionary will be moved into the metadata region of multi-file archives
+     * in a follow-up PR.
+     * @return the compressed size of the Timestamp Dictionary in bytes
+     */
+    size_t write_timestamp_dict();
+
+    static constexpr size_t cReadBlockSize = 4 * 1024;
+
     size_t m_encoded_message_size{};
     size_t m_uncompressed_size{};
     size_t m_compressed_size{};
     int64_t m_next_log_event_id{};
 
     std::string m_id;
 
+    std::string m_archives_dir;
     std::string m_archive_path;
     std::string m_encoded_messages_dir;
 
     std::shared_ptr<VariableDictionaryWriter> m_var_dict;
     std::shared_ptr<LogTypeDictionaryWriter> m_log_dict;
     std::shared_ptr<LogTypeDictionaryWriter> m_array_dict;  // log type dictionary for arrays
-    std::shared_ptr<TimestampDictionaryWriter> m_timestamp_dict;
+    TimestampDictionaryWriter m_timestamp_dict;
     std::shared_ptr<clp::GlobalMySQLMetadataDB> m_metadata_db;
     int m_compression_level{};
     bool m_print_archive_stats{};
+    bool m_single_file_archive{};
     size_t m_min_table_size{};
 
     SchemaMap m_schema_map;