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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "idealstateoperation.h"
#include <vespa/storage/distributor/messagetracker.h>
namespace storage::distributor {
class JoinOperation : public IdealStateOperation
{
public:
/**
* Creates a new join operation.
*
* @param clusterName The name of this storage cluster.
* @param bucketAndNodes The bucket to join into, along with the nodes this operation uses.
* @param bucketsToJoin The buckets to join together. The size of this array should always be either one or two.
*/
JoinOperation(const ClusterContext& cluster_ctx,
const BucketAndNodes& nodes,
const std::vector<document::BucketId>& bucketsToJoin);
~JoinOperation() override;
void onStart(DistributorStripeMessageSender& sender) override;
void onReceive(DistributorStripeMessageSender& sender,
const std::shared_ptr<api::StorageReply>&) override;
const char* getName() const noexcept override {
return "join";
}
Type getType() const noexcept override {
return JOIN_BUCKET;
}
bool isBlocked(const DistributorStripeOperationContext& ctx,
const OperationSequencer& op_seq) const override;
protected:
using NodeToBuckets = std::map<uint16_t, std::vector<document::BucketId>>;
NodeToBuckets resolveSourceBucketsPerTargetNode() const;
void fillMissingSourceBucketsForInconsistentJoins(
NodeToBuckets& nodeToBuckets) const;
/**
* Returns true if any messages were enqueued, false otherwise.
*/
bool enqueueJoinMessagePerTargetNode(const NodeToBuckets& nodeToBuckets);
document::Bucket getJoinBucket(size_t idx) const;
MessageTracker _tracker;
std::vector<document::BucketId> _bucketsToJoin;
};
}
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