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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "configmanager.h"
#include "exceptions.h"
#include "configholder.h"
#include <thread>
#include <sstream>
#include <vespa/log/log.h>
LOG_SETUP(".config.common.configmanager");
namespace config {
ConfigManager::ConfigManager(std::unique_ptr<SourceFactory> sourceFactory, int64_t initialGeneration)
: _idGenerator(0),
_sourceFactory(std::move(sourceFactory)),
_generation(initialGeneration),
_subscriptionMap(),
_lock()
{ }
ConfigManager::~ConfigManager() = default;
ConfigSubscription::SP
ConfigManager::subscribe(const ConfigKey & key, vespalib::duration timeout)
{
LOG(debug, "subscribing on def %s, configid %s", key.getDefName().c_str(), key.getConfigId().c_str());
SubscriptionId id(_idGenerator.fetch_add(1));
auto holder = std::make_shared<ConfigHolder>();
std::unique_ptr<Source> source = _sourceFactory->createSource(holder, key);
source->reload(_generation);
source->getConfig();
auto subscription = std::make_shared<ConfigSubscription>(id, key, holder, std::move(source));
vespalib::steady_time endTime = vespalib::steady_clock::now() + timeout;
while (vespalib::steady_clock::now() < endTime) {
if (holder->poll())
break;
std::this_thread::sleep_for(10ms);
}
if (!holder->poll()) {
std::ostringstream oss;
oss << "Timed out while subscribing to '" << key.getDefNamespace() << "." << key.getDefName() << "', configid '" << key.getConfigId() << "'";
throw ConfigTimeoutException(oss.str());
}
LOG(debug, "done subscribing");
std::lock_guard guard(_lock);
_subscriptionMap[id] = subscription;
return subscription;
}
void
ConfigManager::unsubscribe(const ConfigSubscription & subscription)
{
std::lock_guard guard(_lock);
const SubscriptionId id(subscription.getSubscriptionId());
if (_subscriptionMap.find(id) != _subscriptionMap.end())
_subscriptionMap.erase(id);
}
void
ConfigManager::reload(int64_t generation)
{
_generation = generation;
std::lock_guard guard(_lock);
for (auto & entry : _subscriptionMap) {
entry.second->reload(_generation);
}
}
} // namespace config
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