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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include "mongo/s/catalog/type_chunk.h"
#include "mongo/s/ns_targeter.h"
#include "mongo/unittest/unittest.h"
namespace mongo {
/**
* A MockRange represents a range with endpoint that a MockNSTargeter uses to direct writes to
* a particular endpoint.
*/
struct MockRange {
MockRange(const ShardEndpoint& endpoint, const BSONObj& minKey, const BSONObj& maxKey)
: endpoint(endpoint), range(minKey, maxKey) {}
const ShardEndpoint endpoint;
const ChunkRange range;
};
/**
* A MockNSTargeter directs writes to particular endpoints based on a list of MockRanges given
* to the mock targeter on initialization.
*
* No refreshing behavior is currently supported.
*/
class MockNSTargeter : public NSTargeter {
public:
MockNSTargeter(const NamespaceString& nss, std::vector<MockRange> mockRanges);
const NamespaceString& getNS() const override {
return _nss;
}
/**
* Returns a ShardEndpoint for the doc from the mock ranges. If `chunkRanges` is not nullptr,
* also populates a set of ChunkRange for the chunks that are targeted.
*/
ShardEndpoint targetInsert(OperationContext* opCtx,
const BSONObj& doc,
std::set<ChunkRange>* chunkRanges = nullptr) const override {
auto endpoints = _targetQuery(doc, chunkRanges);
ASSERT_EQ(1U, endpoints.size());
return endpoints.front();
}
/**
* Returns the first ShardEndpoint for the query from the mock ranges. Only can handle
* queries of the form { field : { $gte : <value>, $lt : <value> } }. If `chunkRanges` is not
* nullptr, also populates a set of ChunkRange for the chunks that are targeted.
*/
std::vector<ShardEndpoint> targetUpdate(
OperationContext* opCtx,
const BatchItemRef& itemRef,
std::set<ChunkRange>* chunkRanges = nullptr) const override {
return _targetQuery(itemRef.getUpdateRef().getFilter(), chunkRanges);
}
/**
* Returns the first ShardEndpoint for the query from the mock ranges. Only can handle
* queries of the form { field : { $gte : <value>, $lt : <value> } }. If `chunkRanges` is not
* nullptr, also populates a set of ChunkRange for the chunks that are targeted.
*/
std::vector<ShardEndpoint> targetDelete(
OperationContext* opCtx,
const BatchItemRef& itemRef,
std::set<ChunkRange>* chunkRanges = nullptr) const override {
return _targetQuery(itemRef.getDeleteRef().getFilter(), chunkRanges);
}
std::vector<ShardEndpoint> targetAllShards(
OperationContext* opCtx, std::set<ChunkRange>* chunkRanges = nullptr) const override {
std::vector<ShardEndpoint> endpoints;
for (const auto& range : _mockRanges) {
endpoints.push_back(range.endpoint);
}
return endpoints;
}
void noteCouldNotTarget() override {
// No-op
}
void noteStaleShardResponse(OperationContext* opCtx,
const ShardEndpoint& endpoint,
const StaleConfigInfo& staleInfo) override {
// No-op
}
void noteStaleDbResponse(OperationContext* opCtx,
const ShardEndpoint& endpoint,
const StaleDbRoutingVersion& staleInfo) override {
// No-op
}
bool refreshIfNeeded(OperationContext* opCtx) override {
// No-op
return false;
}
int getNShardsOwningChunks() const override {
// No-op
return 0;
}
bool isShardedTimeSeriesBucketsNamespace() const override {
return false;
}
private:
/**
* Returns the first ShardEndpoint for the query from the mock ranges. Only handles queries of
* the form { field : { $gte : <value>, $lt : <value> } }. If chunkRanges is not nullptr, also
* populates set of ChunkRange for the chunks that are targeted.
*/
std::vector<ShardEndpoint> _targetQuery(const BSONObj& query,
std::set<ChunkRange>* chunkRanges) const;
NamespaceString _nss;
std::vector<MockRange> _mockRanges;
};
void assertEndpointsEqual(const ShardEndpoint& endpointA, const ShardEndpoint& endpointB);
} // namespace mongo
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