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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "proton_config_fetcher.h"
#include "bootstrapconfig.h"
#include <vespa/vespalib/util/exceptions.h>
#include <thread>
#include "proton_config_snapshot.h"
#include "i_proton_configurer.h"
#include <vespa/log/log.h>
LOG_SETUP(".proton.server.proton_config_fetcher");
using namespace vespa::config::search;
using namespace vespa::config::search::core;
using namespace config;
using namespace std::chrono_literals;
namespace proton {
ProtonConfigFetcher::ProtonConfigFetcher(const config::ConfigUri & configUri, IProtonConfigurer &owner, uint64_t subscribeTimeout)
: _bootstrapConfigManager(configUri.getConfigId()),
_retriever(_bootstrapConfigManager.createConfigKeySet(), configUri.getContext(), subscribeTimeout),
_owner(owner),
_mutex(),
_dbManagerMap(),
_threadPool(128 * 1024, 1)
{
}
ProtonConfigFetcher::~ProtonConfigFetcher()
{
close();
}
void
ProtonConfigFetcher::Run(FastOS_ThreadInterface * thread, void *arg)
{
(void) arg;
(void) thread;
while (!_retriever.isClosed()) {
try {
fetchConfigs();
} catch (const config::InvalidConfigException & e) {
LOG(warning, "Invalid config received. Ignoring and continuing with old config : %s", e.what());
std::this_thread::sleep_for(100ms);
}
}
}
const ConfigKeySet
ProtonConfigFetcher::pruneManagerMap(const BootstrapConfig::SP & config)
{
const ProtonConfig & protonConfig = config->getProtonConfig();
DBManagerMap newMap;
ConfigKeySet set;
lock_guard guard(_mutex);
for (size_t i = 0; i < protonConfig.documentdb.size(); i++) {
const ProtonConfig::Documentdb & ddb(protonConfig.documentdb[i]);
DocTypeName docTypeName(ddb.inputdoctypename);
LOG(debug, "Document type(%s), configid(%s)", ddb.inputdoctypename.c_str(), ddb.configid.c_str());
DocumentDBConfigManager::SP mgr;
if (_dbManagerMap.find(docTypeName) != _dbManagerMap.end()) {
mgr = _dbManagerMap[docTypeName];
} else {
mgr = DocumentDBConfigManager::SP(new DocumentDBConfigManager
(ddb.configid, docTypeName.getName()));
}
set.add(mgr->createConfigKeySet());
newMap[docTypeName] = mgr;
}
std::swap(_dbManagerMap, newMap);
return set;
}
void
ProtonConfigFetcher::updateDocumentDBConfigs(const BootstrapConfig::SP & bootstrapConfig, const ConfigSnapshot & snapshot)
{
lock_guard guard(_mutex);
for (DBManagerMap::iterator it(_dbManagerMap.begin()), mt(_dbManagerMap.end());
it != mt;
it++) {
it->second->forwardConfig(bootstrapConfig);
it->second->update(snapshot);
}
}
void
ProtonConfigFetcher::reconfigure()
{
auto bootstrapConfig = _bootstrapConfigManager.getConfig();
int64_t generation = bootstrapConfig->getGeneration();
std::map<DocTypeName, DocumentDBConfig::SP> dbConfigs;
{
lock_guard guard(_mutex);
for (auto &kv : _dbManagerMap) {
auto insres = dbConfigs.insert(std::make_pair(kv.first, kv.second->getConfig()));
assert(insres.second);
assert(insres.first->second->getGeneration() == generation);
}
}
auto configSnapshot = std::make_shared<ProtonConfigSnapshot>(std::move(bootstrapConfig), std::move(dbConfigs));
LOG(debug, "Reconfiguring proton with gen %" PRId64, generation);
_owner.reconfigure(std::move(configSnapshot));
LOG(debug, "Reconfigured proton with gen %" PRId64, generation);
}
void
ProtonConfigFetcher::fetchConfigs()
{
LOG(debug, "Waiting for new config generation");
bool configured = false;
while (!configured) {
ConfigSnapshot bootstrapSnapshot = _retriever.getBootstrapConfigs(5000);
if (_retriever.isClosed())
return;
LOG(debug, "Fetching snapshot");
if (!bootstrapSnapshot.empty()) {
_bootstrapConfigManager.update(bootstrapSnapshot);
BootstrapConfig::SP config = _bootstrapConfigManager.getConfig();
for (bool needsMoreConfig(true); needsMoreConfig && !_retriever.bootstrapRequired(); ) {
const ConfigKeySet configKeySet(pruneManagerMap(config));
// If key set is empty, we have no document databases to configure.
// This is currently not a fatal error, so it will just try to fetch
// the bootstrap config again.
if (!configKeySet.empty()) {
ConfigSnapshot snapshot;
do {
snapshot = _retriever.getConfigs(configKeySet);
if (_retriever.isClosed()) {
return;
}
} while(snapshot.empty() && ! _retriever.bootstrapRequired());
if (!snapshot.empty()) {
LOG(debug, "Set is not empty, reconfiguring with generation %" PRId64, _retriever.getGeneration());
// Update document dbs first, so that we are prepared for
// getConfigs.
_bootstrapConfigManager.update(bootstrapSnapshot);
updateDocumentDBConfigs(config, snapshot);
needsMoreConfig = false;
// Perform callbacks
reconfigure();
configured = true;
}
} else {
LOG(warning, "No document databases in config, trying to re-fetch bootstrap config");
break;
}
}
}
}
}
int64_t
ProtonConfigFetcher::getGeneration() const
{
return _retriever.getGeneration();
}
void
ProtonConfigFetcher::start()
{
fetchConfigs();
if (_threadPool.NewThread(this, NULL) == NULL) {
throw vespalib::IllegalStateException(
"Failed starting thread for proton config fetcher");
}
}
void
ProtonConfigFetcher::close()
{
if (!_retriever.isClosed()) {
_retriever.close();
_threadPool.Close();
}
}
DocumentDBConfig::SP
ProtonConfigFetcher::getDocumentDBConfig(const DocTypeName & docTypeName) const
{
lock_guard guard(_mutex);
DBManagerMap::const_iterator it(_dbManagerMap.find(docTypeName));
if (it == _dbManagerMap.end())
return DocumentDBConfig::SP();
return it->second->getConfig();
}
} // namespace proton
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