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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 "persistenceutil.h"
#include <vespa/config/config.h>
#include <vespa/config/helper/configgetter.hpp>
#include <vespa/log/bufferedlogger.h>
LOG_SETUP(".persistence.util");
namespace storage {
namespace {
std::string generateName(void* p) {
std::ostringstream ost;
ost << "PersistenceUtil(" << p << ")";
return ost.str();
}
}
MessageTracker::MessageTracker(FileStorThreadMetrics::Op& metric,
framework::Clock& clock)
: _sendReply(true),
_metric(metric),
_result(api::ReturnCode::OK),
_timer(clock)
{
_metric.count.inc();
}
MessageTracker::~MessageTracker()
{
if (_reply.get() && _reply->getResult().success()) {
_metric.latency.addValue(_timer.getElapsedTimeAsDouble());
}
}
void
MessageTracker::fail(const ReturnCode& result)
{
_result = result;
LOG(debug, "Failing operation with error: %s", _result.toString().c_str());
}
void
MessageTracker::generateReply(api::StorageCommand& cmd)
{
if (!_sendReply) {
return;
}
if (!_reply.get()) {
_reply.reset(cmd.makeReply().release());
_reply->setResult(_result);
}
if (!_reply->getResult().success()) {
_metric.failed.inc();
LOGBP(debug, "Failed to handle command %s: %s",
cmd.toString().c_str(),
_result.toString().c_str());
}
}
PersistenceUtil::PersistenceUtil(
const config::ConfigUri & configUri,
ServiceLayerComponentRegister& compReg,
FileStorHandler& fileStorHandler,
FileStorThreadMetrics& metrics,
uint16_t partition,
spi::PersistenceProvider& provider)
: _config(*config::ConfigGetter<vespa::config::content::StorFilestorConfig>::getConfig(configUri.getConfigId(), configUri.getContext())),
_compReg(compReg),
_component(compReg, generateName(this)),
_fileStorHandler(fileStorHandler),
_partition(partition),
_nodeIndex(_component.getIndex()),
_metrics(metrics),
_bucketFactory(_component.getBucketIdFactory()),
_repo(_component.getTypeRepo()),
_spi(provider)
{
}
PersistenceUtil::~PersistenceUtil() { }
void
PersistenceUtil::updateBucketDatabase(const document::Bucket &bucket, const api::BucketInfo& i)
{
// Update bucket database
StorBucketDatabase::WrappedEntry entry(getBucketDatabase(bucket.getBucketSpace()).get(bucket.getBucketId(),
"env::updatebucketdb"));
if (entry.exist()) {
api::BucketInfo info = i;
// Don't override last modified unless this is the first bucket
// info reading.
if (entry->info.getLastModified() != 0) {
info.setLastModified(entry->info.getLastModified());
}
entry->setBucketInfo(info);
entry.write();
} else {
LOG(debug, "Bucket(%s).getBucketInfo: Bucket does not exist.", bucket.getBucketId().toString().c_str());
}
}
uint16_t
PersistenceUtil::getPreferredAvailableDisk(const document::Bucket &bucket) const
{
return _component.getPreferredAvailablePartition(bucket);
}
PersistenceUtil::LockResult
PersistenceUtil::lockAndGetDisk(const document::Bucket &bucket,
StorBucketDatabase::Flag flags)
{
// To lock the bucket, we need to ensure that we don't conflict with
// bucket disk move command. First we fetch current disk index from
// bucket DB. When we attempt to lock that lock. And lastly we check
// the bucket DB again to verify that the bucket is still on that
// disk after locking it, or we will have to retry on new disk.
LockResult result;
result.disk = getPreferredAvailableDisk(bucket);
while (true) {
// This function is only called in a context where we require exclusive
// locking (split/join). Refactor if this no longer the case.
std::shared_ptr<FileStorHandler::BucketLockInterface> lock(
_fileStorHandler.lock(bucket, result.disk, api::LockingRequirements::Exclusive));
// TODO disks are no longer used in practice, can we safely discard this?
// Might need it for synchronization purposes if something has taken the
// disk lock _and_ the bucket lock...?
StorBucketDatabase::WrappedEntry entry(getBucketDatabase(bucket.getBucketSpace()).get(
bucket.getBucketId(), "join-lockAndGetDisk-1", flags));
if (entry.exist() && entry->disk != result.disk) {
result.disk = entry->disk;
continue;
}
result.lock = lock;
return result;
}
}
void
PersistenceUtil::setBucketInfo(MessageTracker& tracker, const document::Bucket &bucket)
{
api::BucketInfo info = getBucketInfo(bucket, _partition);
static_cast<api::BucketInfoReply&>(*tracker.getReply()).
setBucketInfo(info);
updateBucketDatabase(bucket, info);
}
api::BucketInfo
PersistenceUtil::getBucketInfo(const document::Bucket &bucket, int disk) const
{
if (disk == -1) {
disk = _partition;
}
spi::BucketInfoResult response =
_spi.getBucketInfo(spi::Bucket(bucket, spi::PartitionId(disk)));
return convertBucketInfo(response.getBucketInfo());
}
api::BucketInfo
PersistenceUtil::convertBucketInfo(const spi::BucketInfo& info) const
{
return api::BucketInfo(info.getChecksum(),
info.getDocumentCount(),
info.getDocumentSize(),
info.getEntryCount(),
info.getUsedSize(),
info.isReady(),
info.isActive(), 0);
}
uint32_t
PersistenceUtil::convertErrorCode(const spi::Result& response)
{
switch (response.getErrorCode()) {
case spi::Result::NONE:
return 0;
case spi::Result::TIMESTAMP_EXISTS:
return api::ReturnCode::TIMESTAMP_EXIST;
case spi::Result::TRANSIENT_ERROR:
case spi::Result::FATAL_ERROR:
return mbus::ErrorCode::APP_TRANSIENT_ERROR;
case spi::Result::RESOURCE_EXHAUSTED:
return api::ReturnCode::NO_SPACE;
case spi::Result::PERMANENT_ERROR:
default:
return mbus::ErrorCode::APP_FATAL_ERROR;
}
return 0;
}
void
PersistenceUtil::shutdown(const std::string& reason)
{
_component.requestShutdown(reason);
}
} // storage
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