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types.go
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/
types.go
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// The MIT License (MIT)
//
// Copyright (c) 2017-2020 Uber Technologies Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package executions
//go:generate enumer -type=ScanType -output scantype_enumer_generated.go
import (
"context"
"strconv"
"go.uber.org/zap"
"github.com/uber/cadence/common/cache"
"github.com/uber/cadence/common/pagination"
"github.com/uber/cadence/common/persistence"
"github.com/uber/cadence/common/reconciliation/entity"
"github.com/uber/cadence/common/reconciliation/fetcher"
"github.com/uber/cadence/common/reconciliation/invariant"
"github.com/uber/cadence/service/worker/scanner/shardscanner"
)
const (
// ConcreteExecutionType concrete execution entity
ConcreteExecutionType ScanType = iota
// CurrentExecutionType current execution entity
CurrentExecutionType
)
// ScanType is the enum for representing different entity types to scan
type ScanType int
type (
//InvariantFactory represents a function which returns Invariant
InvariantFactory func(retryer persistence.Retryer, domainCache cache.DomainCache) invariant.Invariant
//ExecutionFetcher represents a function which returns specific execution entity
ExecutionFetcher func(ctx context.Context, retryer persistence.Retryer, request fetcher.ExecutionRequest) (entity.Entity, error)
)
// ToBlobstoreEntity picks struct depending on scanner type.
func (st ScanType) ToBlobstoreEntity() entity.Entity {
switch st {
case ConcreteExecutionType:
return &entity.ConcreteExecution{}
case CurrentExecutionType:
return &entity.CurrentExecution{}
}
panic("unknown scan type")
}
// ToIterator selects appropriate iterator. It will panic if scan type is unknown.
func (st ScanType) ToIterator() func(ctx context.Context, retryer persistence.Retryer, pageSize int) pagination.Iterator {
switch st {
case ConcreteExecutionType:
return fetcher.ConcreteExecutionIterator
case CurrentExecutionType:
return fetcher.CurrentExecutionIterator
default:
panic("unknown scan type")
}
}
// ToExecutionFetcher selects appropriate execution fetcher. Fetcher returns single execution entity. It will panic if scan type is unknown.
func (st ScanType) ToExecutionFetcher() ExecutionFetcher {
switch st {
case ConcreteExecutionType:
return fetcher.ConcreteExecution
case CurrentExecutionType:
return fetcher.CurrentExecution
default:
panic("unknown scan type")
}
}
// ToInvariants returns list of invariants to be checked depending on scan type.
func (st ScanType) ToInvariants(collections []invariant.Collection, logger *zap.Logger) []InvariantFactory {
var fns []InvariantFactory
switch st {
case ConcreteExecutionType:
for _, collection := range collections {
switch collection {
case invariant.CollectionDomain:
fns = append(fns, invariant.NewInactiveDomainExists)
case invariant.CollectionHistory:
fns = append(fns, invariant.NewHistoryExists)
case invariant.CollectionStale:
fns = append(fns, func(pr persistence.Retryer, dc cache.DomainCache) invariant.Invariant {
return invariant.NewStaleWorkflow(pr, dc, logger.Named(string(invariant.StaleWorkflow)))
})
case invariant.CollectionMutableState:
fns = append(fns, invariant.NewOpenCurrentExecution)
}
}
return fns
case CurrentExecutionType:
for _, collection := range collections {
switch collection {
case invariant.CollectionMutableState:
fns = append(fns, invariant.NewConcreteExecutionExists)
}
}
return fns
default:
panic("unknown scan type")
}
}
// ParseCollections converts string based map to list of collections
func ParseCollections(params shardscanner.CustomScannerConfig) []invariant.Collection {
var collections []invariant.Collection
for k, v := range params {
c, e := invariant.CollectionString(k)
if e != nil {
continue
}
enabled, err := strconv.ParseBool(v)
if enabled && err == nil {
collections = append(collections, c)
}
}
return collections
}