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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "configkeyset.h"
#include "configsnapshot.h"
#include <vespa/config/subscription/configsubscriptionset.h>
#include <vespa/config/common/timingvalues.h>
namespace config {
/**
* The SimpleConfigRetriever takes an entires set of keys and subscribes to
* all of them. Once this is done, it cannot be resubscribed. You can poll this
* for new snapshots.
*/
class SimpleConfigRetriever
{
public:
typedef std::unique_ptr<SimpleConfigRetriever> UP;
SimpleConfigRetriever(const ConfigKeySet & keySet,
std::shared_ptr<IConfigContext> context,
vespalib::duration subscribeTimeout = DEFAULT_SUBSCRIBE_TIMEOUT);
/**
* Attempt retrieving a snapshot of configs.
* @param timeout The amount of time to wait for a new snapshot.
* @return A new snapshot. The snapshot is empty if timeout was reached or
* if the retriever was closed.
*/
ConfigSnapshot getConfigs(vespalib::duration timeout = DEFAULT_GETCONFIGS_TIMEOUT);
void close();
bool isClosed() const;
private:
ConfigSubscriptionSet _set;
std::vector<std::shared_ptr<ConfigSubscription>> _subscriptionList;
};
} // namespace config
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