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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/vespalib/io/fileutil.h>
#include <sstream>
namespace storage::memfile {
class LoggingLazyFile : public vespalib::LazyFile {
public:
class Factory : public Environment::LazyFileFactory {
public:
vespalib::LazyFile::UP createFile(const std::string& fileName) const override {
return vespalib::LazyFile::UP(
new LoggingLazyFile(fileName, vespalib::File::DIRECTIO));
}
};
enum OpType {
READ = 0,
WRITE
};
struct Entry {
OpType opType;
size_t bufsize;
off_t offset;
std::string toString() const {
std::ostringstream ost;
ost << (opType == READ ? "Reading " : "Writing ")
<< bufsize
<< " bytes at "
<< offset;
return ost.str();
}
};
mutable std::vector<Entry> operations;
LoggingLazyFile(const std::string& filename, int flags)
: LazyFile(filename, flags) {};
size_t getOperationCount() const {
return operations.size();
}
off_t write(const void *buf, size_t bufsize, off_t offset) override {
Entry e;
e.opType = WRITE;
e.bufsize = bufsize;
e.offset = offset;
operations.push_back(e);
return vespalib::LazyFile::write(buf, bufsize, offset);
}
size_t read(void *buf, size_t bufsize, off_t offset) const override {
Entry e;
e.opType = READ;
e.bufsize = bufsize;
e.offset = offset;
operations.push_back(e);
return vespalib::LazyFile::read(buf, bufsize, offset);
}
std::string toString() const {
std::ostringstream ost;
for (uint32_t i = 0; i < operations.size(); i++) {
ost << operations[i].toString() << "\n";
}
return ost.str();
}
};
}
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