tmp
Summary: Test Plan: Reviewers: CC: Task ID: # Blame Rev:
This commit is contained in:
Lei Jin
parent
76d54530d3
commit
9ab0132360
@ -798,6 +798,7 @@ class EnvWrapper : public Env {
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// when it is no longer needed.
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// *base_env must remain live while the result is in use.
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Env* NewMemEnv(Env* base_env);
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Env* NewTestMemEnv(Env* base_env);
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} // namespace rocksdb
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367
util/env_mem.cc
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367
util/env_mem.cc
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@ -0,0 +1,367 @@
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "rocksdb/env.h"
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#include "rocksdb/status.h"
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#include "port/port.h"
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#include "util/mutexlock.h"
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#include <map>
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#include <string.h>
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#include <string>
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#include <vector>
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namespace rocksdb {
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namespace {
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class MemFile {
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public:
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enum Mode {
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READ = 0,
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WRITE = 1,
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};
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MemFile(Mode mode) : mode_(mode), refs_(0) {}
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void Ref() {
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MutexLock lock(&mutex_);
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++refs_;
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}
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void Unref() {
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bool do_delete = false;
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{
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MutexLock lock(&mutex_);
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--refs_;
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assert(refs_ >= 0);
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if (refs_ <= 0) {
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do_delete = true;
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}
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}
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if (do_delete) {
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delete this;
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}
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}
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void SetMode(Mode mode) {
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mode_ = mode;
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}
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uint64_t Size() const { return data_.size(); }
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Status Read(uint64_t offset, size_t n, Slice* result, char* scratch) const {
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assert(mode_ == READ);
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if (offset > Size()) {
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return Status::IOError("Offset greater than file size.");
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}
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const uint64_t available = Size() - offset;
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if (n > available) {
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n = available;
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}
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if (n == 0) {
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*result = Slice();
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return Status::OK();
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}
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if (scratch) {
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memcpy(scratch, &(data_[offset]), n);
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*result = Slice(scratch, n);
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} else {
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*result = Slice(&(data_[offset]), n);
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}
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return Status::OK();
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}
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Status Append(const Slice& data) {
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assert(mode_ == WRITE);
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data_.append(data.data(), data.size());
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return Status::OK();
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}
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Status Fsync() {
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return Status::OK();
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}
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private:
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// Private since only Unref() should be used to delete it.
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~MemFile() {
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assert(refs_ == 0);
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}
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// No copying allowed.
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MemFile(const MemFile&);
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void operator=(const MemFile&);
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Mode mode_;
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port::Mutex mutex_;
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int refs_; // Protected by mutex_;
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std::string data_;
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};
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class SequentialFileImpl : public SequentialFile {
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public:
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explicit SequentialFileImpl(MemFile* file) : file_(file), pos_(0) {
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file_->Ref();
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}
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~SequentialFileImpl() {
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file_->Unref();
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}
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virtual Status Read(size_t n, Slice* result, char* scratch) {
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Status s = file_->Read(pos_, n, result, scratch);
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if (s.ok()) {
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pos_ += result->size();
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}
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return s;
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}
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virtual Status Skip(uint64_t n) {
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if (pos_ > file_->Size()) {
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return Status::IOError("pos_ > file_->Size()");
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}
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const size_t available = file_->Size() - pos_;
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if (n > available) {
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n = available;
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}
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pos_ += n;
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return Status::OK();
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}
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private:
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MemFile* file_;
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size_t pos_;
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};
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class RandomAccessFileImpl : public RandomAccessFile {
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public:
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explicit RandomAccessFileImpl(MemFile* file) : file_(file) {
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file_->Ref();
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}
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~RandomAccessFileImpl() {
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file_->Unref();
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}
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virtual Status Read(uint64_t offset, size_t n, Slice* result,
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char* scratch) const {
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return file_->Read(offset, n, result, scratch);
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}
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private:
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MemFile* file_;
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};
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class WritableFileImpl : public WritableFile {
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public:
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WritableFileImpl(MemFile* file) : file_(file) {
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file_->Ref();
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}
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~WritableFileImpl() {
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file_->Unref();
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}
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virtual Status Append(const Slice& data) {
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return file_->Append(data);
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}
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virtual Status Close() {
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return Status::OK();
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}
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virtual Status Flush() {
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return Status::OK();
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}
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virtual Status Sync() {
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return file_->Fsync();
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}
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private:
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MemFile* file_;
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};
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class TestMemDirectory : public Directory {
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public:
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virtual Status Fsync() { return Status::OK(); }
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};
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class TestMemEnv : public EnvWrapper {
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public:
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explicit TestMemEnv(Env* base_env) : EnvWrapper(base_env) { }
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virtual ~TestMemEnv() {
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for (FileSystem::iterator i = file_map_.begin(); i != file_map_.end(); ++i){
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i->second->Unref();
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}
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}
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// Partial implementation of the Env interface.
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virtual Status NewSequentialFile(const std::string& fname,
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unique_ptr<SequentialFile>* result,
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const EnvOptions& soptions) {
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MutexLock lock(&mutex_);
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if (file_map_.find(fname) == file_map_.end()) {
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*result = NULL;
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return Status::IOError(fname, "File not found");
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}
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auto* f = file_map_[fname];
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f->SetMode(MemFile::READ);
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result->reset(new SequentialFileImpl(f));
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return Status::OK();
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}
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virtual Status NewRandomAccessFile(const std::string& fname,
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unique_ptr<RandomAccessFile>* result,
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const EnvOptions& soptions) {
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MutexLock lock(&mutex_);
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if (file_map_.find(fname) == file_map_.end()) {
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*result = NULL;
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return Status::IOError(fname, "File not found");
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}
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auto* f = file_map_[fname];
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f->SetMode(MemFile::READ);
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result->reset(new RandomAccessFileImpl(f));
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return Status::OK();
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}
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virtual Status NewWritableFile(const std::string& fname,
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unique_ptr<WritableFile>* result,
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const EnvOptions& soptions) {
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MutexLock lock(&mutex_);
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if (file_map_.find(fname) != file_map_.end()) {
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DeleteFileInternal(fname);
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}
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MemFile* file = new MemFile(MemFile::WRITE);
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file->Ref();
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file_map_[fname] = file;
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result->reset(new WritableFileImpl(file));
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return Status::OK();
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}
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virtual Status NewRandomRWFile(const std::string& fname,
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unique_ptr<RandomRWFile>* result,
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const EnvOptions& options) {
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return Status::OK();
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}
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virtual Status NewDirectory(const std::string& name,
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unique_ptr<Directory>* result) {
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result->reset(new TestMemDirectory());
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return Status::OK();
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}
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virtual bool FileExists(const std::string& fname) {
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MutexLock lock(&mutex_);
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return file_map_.find(fname) != file_map_.end();
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}
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virtual Status GetChildren(const std::string& dir,
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std::vector<std::string>* result) {
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MutexLock lock(&mutex_);
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result->clear();
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for (FileSystem::iterator i = file_map_.begin(); i != file_map_.end(); ++i){
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const std::string& filename = i->first;
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if (filename.size() >= dir.size() + 1 && filename[dir.size()] == '/' &&
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Slice(filename).starts_with(Slice(dir))) {
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result->push_back(filename.substr(dir.size() + 1));
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}
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}
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return Status::OK();
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}
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void DeleteFileInternal(const std::string& fname) {
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if (file_map_.find(fname) == file_map_.end()) {
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return;
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}
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file_map_[fname]->Unref();
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file_map_.erase(fname);
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}
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virtual Status DeleteFile(const std::string& fname) {
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MutexLock lock(&mutex_);
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if (file_map_.find(fname) == file_map_.end()) {
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return Status::IOError(fname, "File not found");
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}
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DeleteFileInternal(fname);
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return Status::OK();
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}
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virtual Status CreateDir(const std::string& dirname) {
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return Status::OK();
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}
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virtual Status CreateDirIfMissing(const std::string& dirname) {
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return Status::OK();
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}
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virtual Status DeleteDir(const std::string& dirname) {
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return Status::OK();
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}
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virtual Status GetFileSize(const std::string& fname, uint64_t* file_size) {
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MutexLock lock(&mutex_);
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if (file_map_.find(fname) == file_map_.end()) {
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return Status::IOError(fname, "File not found");
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}
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*file_size = file_map_[fname]->Size();
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return Status::OK();
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}
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virtual Status GetFileModificationTime(const std::string& fname,
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uint64_t* time) {
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return Status::NotSupported("getFileMTime", "Not supported in MemEnv");
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}
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virtual Status RenameFile(const std::string& src,
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const std::string& target) {
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MutexLock lock(&mutex_);
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if (file_map_.find(src) == file_map_.end()) {
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return Status::IOError(src, "File not found");
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}
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DeleteFileInternal(target);
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file_map_[target] = file_map_[src];
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file_map_.erase(src);
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return Status::OK();
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}
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virtual Status LockFile(const std::string& fname, FileLock** lock) {
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*lock = new FileLock;
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return Status::OK();
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}
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virtual Status UnlockFile(FileLock* lock) {
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delete lock;
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return Status::OK();
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}
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virtual Status GetTestDirectory(std::string* path) {
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*path = "/test";
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return Status::OK();
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}
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private:
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// Map from filenames to MemFile objects, representing a simple file system.
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typedef std::map<std::string, MemFile*> FileSystem;
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port::Mutex mutex_;
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FileSystem file_map_; // Protected by mutex_.
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};
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} // namespace
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Env* NewTestMemEnv(Env* base_env) {
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return new TestMemEnv(base_env);
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}
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} // namespace rocksdb
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231
util/env_mem_test.cc
Normal file
231
util/env_mem_test.cc
Normal file
@ -0,0 +1,231 @@
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "db/db_impl.h"
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#include "rocksdb/db.h"
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#include "rocksdb/env.h"
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#include "util/testharness.h"
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#include <memory>
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#include <string>
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#include <vector>
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namespace rocksdb {
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class MemEnvTest {
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public:
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Env* env_;
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const EnvOptions soptions_;
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MemEnvTest()
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: env_(NewMemEnv(Env::Default())) {
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}
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~MemEnvTest() {
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delete env_;
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}
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};
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TEST(MemEnvTest, Basics) {
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uint64_t file_size;
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unique_ptr<WritableFile> writable_file;
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std::vector<std::string> children;
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ASSERT_OK(env_->CreateDir("/dir"));
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// Check that the directory is empty.
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ASSERT_TRUE(!env_->FileExists("/dir/non_existent"));
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ASSERT_TRUE(!env_->GetFileSize("/dir/non_existent", &file_size).ok());
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ASSERT_OK(env_->GetChildren("/dir", &children));
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ASSERT_EQ(0U, children.size());
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// Create a file.
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ASSERT_OK(env_->NewWritableFile("/dir/f", &writable_file, soptions_));
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writable_file.reset();
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// Check that the file exists.
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ASSERT_TRUE(env_->FileExists("/dir/f"));
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ASSERT_OK(env_->GetFileSize("/dir/f", &file_size));
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ASSERT_EQ(0U, file_size);
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ASSERT_OK(env_->GetChildren("/dir", &children));
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ASSERT_EQ(1U, children.size());
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ASSERT_EQ("f", children[0]);
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// Write to the file.
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ASSERT_OK(env_->NewWritableFile("/dir/f", &writable_file, soptions_));
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ASSERT_OK(writable_file->Append("abc"));
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writable_file.reset();
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// Check for expected size.
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ASSERT_OK(env_->GetFileSize("/dir/f", &file_size));
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ASSERT_EQ(3U, file_size);
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// Check that renaming works.
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ASSERT_TRUE(!env_->RenameFile("/dir/non_existent", "/dir/g").ok());
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ASSERT_OK(env_->RenameFile("/dir/f", "/dir/g"));
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ASSERT_TRUE(!env_->FileExists("/dir/f"));
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ASSERT_TRUE(env_->FileExists("/dir/g"));
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ASSERT_OK(env_->GetFileSize("/dir/g", &file_size));
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ASSERT_EQ(3U, file_size);
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// Check that opening non-existent file fails.
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unique_ptr<SequentialFile> seq_file;
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unique_ptr<RandomAccessFile> rand_file;
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ASSERT_TRUE(!env_->NewSequentialFile("/dir/non_existent", &seq_file,
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soptions_).ok());
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ASSERT_TRUE(!seq_file);
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ASSERT_TRUE(!env_->NewRandomAccessFile("/dir/non_existent", &rand_file,
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soptions_).ok());
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ASSERT_TRUE(!rand_file);
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// Check that deleting works.
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ASSERT_TRUE(!env_->DeleteFile("/dir/non_existent").ok());
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ASSERT_OK(env_->DeleteFile("/dir/g"));
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ASSERT_TRUE(!env_->FileExists("/dir/g"));
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ASSERT_OK(env_->GetChildren("/dir", &children));
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ASSERT_EQ(0U, children.size());
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ASSERT_OK(env_->DeleteDir("/dir"));
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}
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TEST(MemEnvTest, ReadWrite) {
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unique_ptr<WritableFile> writable_file;
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unique_ptr<SequentialFile> seq_file;
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unique_ptr<RandomAccessFile> rand_file;
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Slice result;
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char scratch[100];
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ASSERT_OK(env_->CreateDir("/dir"));
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ASSERT_OK(env_->NewWritableFile("/dir/f", &writable_file, soptions_));
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ASSERT_OK(writable_file->Append("hello "));
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ASSERT_OK(writable_file->Append("world"));
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writable_file.reset();
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// Read sequentially.
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ASSERT_OK(env_->NewSequentialFile("/dir/f", &seq_file, soptions_));
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ASSERT_OK(seq_file->Read(5, &result, scratch)); // Read "hello".
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ASSERT_EQ(0, result.compare("hello"));
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ASSERT_OK(seq_file->Skip(1));
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ASSERT_OK(seq_file->Read(1000, &result, scratch)); // Read "world".
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ASSERT_EQ(0, result.compare("world"));
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ASSERT_OK(seq_file->Read(1000, &result, scratch)); // Try reading past EOF.
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ASSERT_EQ(0U, result.size());
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ASSERT_OK(seq_file->Skip(100)); // Try to skip past end of file.
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ASSERT_OK(seq_file->Read(1000, &result, scratch));
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ASSERT_EQ(0U, result.size());
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// Random reads.
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ASSERT_OK(env_->NewRandomAccessFile("/dir/f", &rand_file, soptions_));
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ASSERT_OK(rand_file->Read(6, 5, &result, scratch)); // Read "world".
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ASSERT_EQ(0, result.compare("world"));
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ASSERT_OK(rand_file->Read(0, 5, &result, scratch)); // Read "hello".
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ASSERT_EQ(0, result.compare("hello"));
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ASSERT_OK(rand_file->Read(10, 100, &result, scratch)); // Read "d".
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ASSERT_EQ(0, result.compare("d"));
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// Too high offset.
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ASSERT_TRUE(!rand_file->Read(1000, 5, &result, scratch).ok());
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}
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TEST(MemEnvTest, Locks) {
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FileLock* lock;
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// These are no-ops, but we test they return success.
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ASSERT_OK(env_->LockFile("some file", &lock));
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ASSERT_OK(env_->UnlockFile(lock));
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}
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|
||||
TEST(MemEnvTest, Misc) {
|
||||
std::string test_dir;
|
||||
ASSERT_OK(env_->GetTestDirectory(&test_dir));
|
||||
ASSERT_TRUE(!test_dir.empty());
|
||||
|
||||
unique_ptr<WritableFile> writable_file;
|
||||
ASSERT_OK(env_->NewWritableFile("/a/b", &writable_file, soptions_));
|
||||
|
||||
// These are no-ops, but we test they return success.
|
||||
ASSERT_OK(writable_file->Sync());
|
||||
ASSERT_OK(writable_file->Flush());
|
||||
ASSERT_OK(writable_file->Close());
|
||||
writable_file.reset();
|
||||
}
|
||||
|
||||
TEST(MemEnvTest, LargeWrite) {
|
||||
const size_t kWriteSize = 300 * 1024;
|
||||
char* scratch = new char[kWriteSize * 2];
|
||||
|
||||
std::string write_data;
|
||||
for (size_t i = 0; i < kWriteSize; ++i) {
|
||||
write_data.append(1, static_cast<char>(i));
|
||||
}
|
||||
|
||||
unique_ptr<WritableFile> writable_file;
|
||||
ASSERT_OK(env_->NewWritableFile("/dir/f", &writable_file, soptions_));
|
||||
ASSERT_OK(writable_file->Append("foo"));
|
||||
ASSERT_OK(writable_file->Append(write_data));
|
||||
writable_file.reset();
|
||||
|
||||
unique_ptr<SequentialFile> seq_file;
|
||||
Slice result;
|
||||
ASSERT_OK(env_->NewSequentialFile("/dir/f", &seq_file, soptions_));
|
||||
ASSERT_OK(seq_file->Read(3, &result, scratch)); // Read "foo".
|
||||
ASSERT_EQ(0, result.compare("foo"));
|
||||
|
||||
size_t read = 0;
|
||||
std::string read_data;
|
||||
while (read < kWriteSize) {
|
||||
ASSERT_OK(seq_file->Read(kWriteSize - read, &result, scratch));
|
||||
read_data.append(result.data(), result.size());
|
||||
read += result.size();
|
||||
}
|
||||
ASSERT_TRUE(write_data == read_data);
|
||||
delete [] scratch;
|
||||
}
|
||||
|
||||
TEST(MemEnvTest, DBTest) {
|
||||
Options options;
|
||||
options.create_if_missing = true;
|
||||
options.env = env_;
|
||||
DB* db;
|
||||
|
||||
const Slice keys[] = {Slice("aaa"), Slice("bbb"), Slice("ccc")};
|
||||
const Slice vals[] = {Slice("foo"), Slice("bar"), Slice("baz")};
|
||||
|
||||
ASSERT_OK(DB::Open(options, "/dir/db", &db));
|
||||
for (size_t i = 0; i < 3; ++i) {
|
||||
ASSERT_OK(db->Put(WriteOptions(), keys[i], vals[i]));
|
||||
}
|
||||
|
||||
for (size_t i = 0; i < 3; ++i) {
|
||||
std::string res;
|
||||
ASSERT_OK(db->Get(ReadOptions(), keys[i], &res));
|
||||
ASSERT_TRUE(res == vals[i]);
|
||||
}
|
||||
|
||||
Iterator* iterator = db->NewIterator(ReadOptions());
|
||||
iterator->SeekToFirst();
|
||||
for (size_t i = 0; i < 3; ++i) {
|
||||
ASSERT_TRUE(iterator->Valid());
|
||||
ASSERT_TRUE(keys[i] == iterator->key());
|
||||
ASSERT_TRUE(vals[i] == iterator->value());
|
||||
iterator->Next();
|
||||
}
|
||||
ASSERT_TRUE(!iterator->Valid());
|
||||
delete iterator;
|
||||
|
||||
DBImpl* dbi = reinterpret_cast<DBImpl*>(db);
|
||||
ASSERT_OK(dbi->TEST_FlushMemTable());
|
||||
|
||||
for (size_t i = 0; i < 3; ++i) {
|
||||
std::string res;
|
||||
ASSERT_OK(db->Get(ReadOptions(), keys[i], &res));
|
||||
ASSERT_TRUE(res == vals[i]);
|
||||
}
|
||||
|
||||
delete db;
|
||||
}
|
||||
|
||||
} // namespace rocksdb
|
||||
|
||||
int main(int argc, char** argv) {
|
||||
return rocksdb::test::RunAllTests();
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user