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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <vespa/persistence/spi/bucket.h>
#include <vespa/persistence/spi/clusterstate.h>
namespace storage {
namespace spi {
/**
* Used to determine the state of the current node and its buckets.
*/
class ClusterStateImpl : public ClusterState{
public:
ClusterStateImpl();
ClusterStateImpl(const lib::ClusterState& state,
uint16_t nodeIndex,
const lib::Distribution& distribution);
ClusterStateImpl(vespalib::nbostream& i);
ClusterStateImpl(const ClusterStateImpl& other);
ClusterStateImpl& operator=(const ClusterStateImpl& other);
/**
* Returns true if the given bucket is in the ideal state
* for readiness.
*
* @param b The bucket to check.
*/
bool shouldBeReady(const Bucket& b) const;
/**
* Returns false if the cluster has been deemed down. This can happen
* if the fleet controller has detected that too many nodes are down
* compared to the complete list of nodes, and deigns the system to be
* unusable.
*/
bool clusterUp() const;
/**
* Returns false if this node has been set in a state where it should not
* receive external load.
*/
bool nodeUp() const;
/**
* Returns a serialized form of this object.
*/
void serialize(vespalib::nbostream& o) const;
private:
std::unique_ptr<lib::ClusterState> _state;
uint16_t _nodeIndex;
std::unique_ptr<lib::Distribution> _distribution;
void deserialize(vespalib::nbostream&);
};
}
}
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