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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "simulatedfailurefile.h"
#include <vespa/vespalib/util/exceptions.h>
namespace storage {
namespace memfile {
vespalib::LazyFile::UP
SimulatedFailureLazyFile::Factory::createFile(const std::string& fileName) const {
return vespalib::LazyFile::UP(
new SimulatedFailureLazyFile(fileName,
vespalib::File::DIRECTIO,
_readOpsBeforeFailure,
_writeOpsBeforeFailure));
}
SimulatedFailureLazyFile::SimulatedFailureLazyFile(
const std::string& filename,
int flags,
int readOpsBeforeFailure,
int writeOpsBeforeFailure)
: LazyFile(filename, flags),
_readOpsBeforeFailure(readOpsBeforeFailure),
_writeOpsBeforeFailure(writeOpsBeforeFailure)
{
}
off_t
SimulatedFailureLazyFile::write(const void *buf, size_t bufsize, off_t offset)
{
if (_writeOpsBeforeFailure == 0) {
throw vespalib::IoException(
"A simulated I/O write exception was triggered",
vespalib::IoException::CORRUPT_DATA, VESPA_STRLOC);
}
--_writeOpsBeforeFailure;
return vespalib::LazyFile::write(buf, bufsize, offset);
}
size_t
SimulatedFailureLazyFile::read(void *buf, size_t bufsize, off_t offset) const
{
if (_readOpsBeforeFailure == 0) {
throw vespalib::IoException(
"A simulated I/O read exception was triggered",
vespalib::IoException::CORRUPT_DATA, VESPA_STRLOC);
}
--_readOpsBeforeFailure;
return vespalib::LazyFile::read(buf, bufsize, offset);
}
} // ns memfile
} // ns storage
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