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103 lines
2.4 KiB
C++
103 lines
2.4 KiB
C++
#include <Storages/MergeTree/MergeTreeMutationEntry.h>
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#include <IO/Operators.h>
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#include <IO/WriteBufferFromFile.h>
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#include <IO/ReadBufferFromFile.h>
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#include <IO/ReadBufferFromString.h>
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#include <Poco/File.h>
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#include <Poco/Path.h>
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#include <utility>
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namespace DB
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{
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MergeTreeMutationEntry::MergeTreeMutationEntry(MutationCommands commands_, DiskPtr disk_, const String & path_prefix_, Int64 tmp_number)
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: create_time(time(nullptr))
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, commands(std::move(commands_))
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, disk(std::move(disk_))
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, path_prefix(path_prefix_)
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, file_name("tmp_mutation_" + toString(tmp_number) + ".txt")
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, is_temp(true)
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{
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try
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{
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auto out = disk->writeFile(path_prefix + file_name);
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*out << "format version: 1\n"
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<< "create time: " << LocalDateTime(create_time) << "\n";
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*out << "commands: ";
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commands.writeText(*out);
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*out << "\n";
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out->sync();
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}
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catch (...)
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{
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removeFile();
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throw;
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}
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}
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void MergeTreeMutationEntry::commit(Int64 block_number_)
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{
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block_number = block_number_;
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String new_file_name = "mutation_" + toString(block_number) + ".txt";
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disk->moveFile(path_prefix + file_name, path_prefix + new_file_name);
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is_temp = false;
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file_name = new_file_name;
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}
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void MergeTreeMutationEntry::removeFile()
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{
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if (!file_name.empty())
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{
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if (!disk->exists(path_prefix + file_name))
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return;
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disk->remove(path_prefix + file_name);
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file_name.clear();
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}
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}
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MergeTreeMutationEntry::MergeTreeMutationEntry(DiskPtr disk_, const String & path_prefix_, const String & file_name_)
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: disk(std::move(disk_))
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, path_prefix(path_prefix_)
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, file_name(file_name_)
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, is_temp(false)
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{
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ReadBufferFromString file_name_buf(file_name);
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file_name_buf >> "mutation_" >> block_number >> ".txt";
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assertEOF(file_name_buf);
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auto buf = disk->readFile(path_prefix + file_name);
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*buf >> "format version: 1\n";
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LocalDateTime create_time_dt;
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*buf >> "create time: " >> create_time_dt >> "\n";
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create_time = create_time_dt;
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*buf >> "commands: ";
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commands.readText(*buf);
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*buf >> "\n";
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assertEOF(*buf);
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}
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MergeTreeMutationEntry::~MergeTreeMutationEntry()
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{
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if (is_temp && startsWith(file_name, "tmp_"))
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{
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try
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{
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removeFile();
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}
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catch (...)
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{
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tryLogCurrentException(__PRETTY_FUNCTION__);
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}
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}
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}
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}
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