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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "buckethandler.h"
#include "ibucketstatechangedhandler.h"
#include <vespa/searchcore/proton/bucketdb/bucket_db_owner.h>
#include <vespa/vespalib/util/lambdatask.h>
#include <cassert>
#include <vespa/log/log.h>
LOG_SETUP(".proton.server.buckethandler");
using document::BucketId;
using storage::spi::Bucket;
using storage::spi::BucketChecksum;
using storage::spi::BucketIdListResult;
using storage::spi::BucketInfo;
using storage::spi::BucketInfoResult;
using storage::spi::Result;
using vespalib::Executor;
using vespalib::makeLambdaTask;
namespace proton {
void
BucketHandler::performSetCurrentState(BucketId bucketId,
storage::spi::BucketInfo::ActiveState newState,
IGenericResultHandler *resultHandler)
{
if (!_nodeUp) {
Result result(Result::ErrorType::TRANSIENT_ERROR,
"Cannot set bucket active state when node is down");
resultHandler->handle(result);
return;
}
bool active = (newState == storage::spi::BucketInfo::ACTIVE);
LOG(debug, "performSetCurrentState(%s, %s)",
bucketId.toString().c_str(), (active ? "ACTIVE" : "NOT_ACTIVE"));
_ready->setBucketState(bucketId, active);
for (const auto & ch : _changedHandlers) {
ch->notifyBucketStateChanged(bucketId, newState);
}
resultHandler->handle(Result());
}
void
BucketHandler::performPopulateActiveBuckets(document::BucketId::List buckets,
IGenericResultHandler *resultHandler)
{
_ready->populateActiveBuckets(std::move(buckets));
resultHandler->handle(Result());
}
void
BucketHandler::deactivateAllActiveBuckets()
{
BucketId::List buckets = _ready->getBucketDB().takeGuard()->getActiveBuckets();
for (auto bucketId : buckets) {
_ready->setBucketState(bucketId, storage::spi::BucketInfo::NOT_ACTIVE);
// Don't notify bucket state changed, node is marked down so
// noone is listening.
}
}
BucketHandler::BucketHandler(vespalib::Executor &executor)
: IClusterStateChangedHandler(),
IBucketStateChangedNotifier(),
_executor(executor),
_ready(nullptr),
_changedHandlers(),
_nodeUp(false),
_nodeMaintenance(false)
{
LOG(spam, "BucketHandler::BucketHandler");
}
BucketHandler::~BucketHandler()
{
assert(_changedHandlers.empty());
}
void
BucketHandler::setReadyBucketHandler(documentmetastore::IBucketHandler &ready)
{
_ready = &ready;
}
void
BucketHandler::handleListBuckets(IBucketIdListResultHandler &resultHandler)
{
// Called by SPI thread.
// BucketDBOwner ensures synchronization between SPI thread and
// master write thread in document database.
BucketIdListResult::List buckets = _ready->getBucketDB().takeGuard()->getBuckets();
resultHandler.handle(BucketIdListResult(std::move(buckets)));
}
void
BucketHandler::handleSetCurrentState(const BucketId &bucketId,
storage::spi::BucketInfo::ActiveState newState,
std::shared_ptr<IGenericResultHandler> resultHandlerSP)
{
_executor.execute(makeLambdaTask([this, bucketId, newState, resultHandler = std::move(resultHandlerSP)]() {
performSetCurrentState(bucketId, newState, resultHandler.get());
}));
}
void
BucketHandler::handleGetBucketInfo(const Bucket &bucket,
IBucketInfoResultHandler &resultHandler)
{
// Called by SPI thread.
// BucketDBOwner ensures synchronization between SPI thread and
// master write thread in document database.
BucketInfo bucketInfo = _ready->getBucketDB().takeGuard()->cachedGetBucketInfo(bucket);
LOG(spam, "handleGetBucketInfo(%s): %s",
bucket.toString().c_str(), bucketInfo.toString().c_str());
resultHandler.handle(BucketInfoResult(bucketInfo));
}
bool
BucketHandler::hasBucket(const storage::spi::Bucket &bucket) {
return _ready->getBucketDB().takeGuard()->hasBucket(bucket);
}
void
BucketHandler::handleListActiveBuckets(IBucketIdListResultHandler &resultHandler)
{
// Called by SPI thread.
// BucketDBOwner ensures synchronization between SPI thread and
// master write thread in document database.
resultHandler.handle(BucketIdListResult(_ready->getBucketDB().takeGuard()->getActiveBuckets()));
}
void
BucketHandler::handlePopulateActiveBuckets(document::BucketId::List buckets,
IGenericResultHandler &resultHandler)
{
_executor.execute(makeLambdaTask([this, moved_buckets=std::move(buckets), &resultHandler]() mutable {
performPopulateActiveBuckets(std::move(moved_buckets), &resultHandler);
}));
}
namespace {
constexpr const char* bool_str(bool v) noexcept {
return v ? "true" : "false";
}
}
void
BucketHandler::notifyClusterStateChanged(const std::shared_ptr<IBucketStateCalculator> & newCalc)
{
bool oldNodeUp = _nodeUp;
bool oldNodeMaintenance = _nodeMaintenance;
_nodeUp = newCalc->nodeUp(); // Up, Retired or Initializing
_nodeMaintenance = newCalc->nodeMaintenance();
LOG(spam, "notifyClusterStateChanged; up: %s -> %s, maintenance: %s -> %s",
bool_str(oldNodeUp), bool_str(_nodeUp),
bool_str(oldNodeMaintenance), bool_str(_nodeMaintenance));
if (_nodeMaintenance) {
return; // Don't deactivate buckets in maintenance mode; let query traffic drain away naturally.
}
// We implicitly deactivate buckets in two edge cases:
// - Up -> Down (not maintenance; handled above), since the node can not be expected to offer
// any graceful query draining when set Down.
// - Maintenance -> !Maintenance, since we'd otherwise introduce a bunch of transient duplicate
// results into queries if we transition to an available state.
// The assumption is that the system has already activated buckets on other nodes in such a scenario.
if ((oldNodeUp && !_nodeUp) || oldNodeMaintenance) {
deactivateAllActiveBuckets();
}
}
void
BucketHandler::addBucketStateChangedHandler(IBucketStateChangedHandler *handler)
{
_changedHandlers.push_back(handler);
}
void
BucketHandler::
removeBucketStateChangedHandler(IBucketStateChangedHandler *handler)
{
// Called by executor thread
auto it = std::find(_changedHandlers.begin(), _changedHandlers.end(), handler);
if (it != _changedHandlers.end()) {
_changedHandlers.erase(it);
}
}
} // namespace proton
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