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90 lines
2.6 KiB
C++
90 lines
2.6 KiB
C++
#include "IDisk.h"
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#include "Disks/Executor.h"
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#include <IO/ReadBufferFromFileBase.h>
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#include <IO/WriteBufferFromFileBase.h>
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#include <IO/copyData.h>
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#include <Poco/Logger.h>
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#include <base/logger_useful.h>
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#include <Common/setThreadName.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int NOT_IMPLEMENTED;
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}
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bool IDisk::isDirectoryEmpty(const String & path)
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{
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return !iterateDirectory(path)->isValid();
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}
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void copyFile(IDisk & from_disk, const String & from_path, IDisk & to_disk, const String & to_path)
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{
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LOG_DEBUG(&Poco::Logger::get("IDisk"), "Copying from {} (path: {}) {} to {} (path: {}) {}.",
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from_disk.getName(), from_disk.getPath(), from_path, to_disk.getName(), to_disk.getPath(), to_path);
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auto in = from_disk.readFile(from_path);
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auto out = to_disk.writeFile(to_path);
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copyData(*in, *out);
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out->finalize();
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}
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using ResultsCollector = std::vector<std::future<void>>;
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void asyncCopy(IDisk & from_disk, String from_path, IDisk & to_disk, String to_path, Executor & exec, ResultsCollector & results)
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{
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if (from_disk.isFile(from_path))
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{
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auto result = exec.execute(
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[&from_disk, from_path, &to_disk, to_path]()
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{
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setThreadName("DiskCopier");
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DB::copyFile(from_disk, from_path, to_disk, fs::path(to_path) / fileName(from_path));
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});
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results.push_back(std::move(result));
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}
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else
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{
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fs::path dir_name = fs::path(from_path).parent_path().filename();
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fs::path dest(fs::path(to_path) / dir_name);
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to_disk.createDirectories(dest);
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for (auto it = from_disk.iterateDirectory(from_path); it->isValid(); it->next())
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asyncCopy(from_disk, it->path(), to_disk, dest, exec, results);
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}
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}
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void IDisk::copyThroughBuffers(const String & from_path, const std::shared_ptr<IDisk> & to_disk, const String & to_path)
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{
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auto & exec = to_disk->getExecutor();
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ResultsCollector results;
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asyncCopy(*this, from_path, *to_disk, to_path, exec, results);
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for (auto & result : results)
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result.wait();
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for (auto & result : results)
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result.get();
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}
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void IDisk::copy(const String & from_path, const std::shared_ptr<IDisk> & to_disk, const String & to_path)
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{
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copyThroughBuffers(from_path, to_disk, to_path);
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}
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void IDisk::truncateFile(const String &, size_t)
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{
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throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Truncate operation is not implemented for disk of type {}", getType());
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}
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SyncGuardPtr IDisk::getDirectorySyncGuard(const String & /* path */) const
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{
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return nullptr;
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}
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}
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