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db.go
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db.go
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package database
// Visitor combine of every handler, to be api of database
type Visitor struct {
BasicHandler
MapHandler
ContractHandler
TokenHandler
RollbackHandler
DelaytxHandler
GasHandler
RAMHandler
}
// NewVisitor get a visitor of a DB, with cache length determined
func NewVisitor(cacheLength int, cb IMultiValue) *Visitor {
db := newChainbaseAdapter(cb)
lruDB := NewLRU(cacheLength, db)
cachedDB := NewWriteCache(lruDB)
v := &Visitor{
BasicHandler: BasicHandler{cachedDB},
MapHandler: MapHandler{cachedDB},
ContractHandler: ContractHandler{cachedDB},
TokenHandler: TokenHandler{cachedDB},
RAMHandler: RAMHandler{cachedDB},
}
v.GasHandler = GasHandler{v.BasicHandler, v.MapHandler}
v.RollbackHandler = newRollbackHandler(lruDB, cachedDB)
return v
}
// NewBatchVisitorRoot get LRU to next step
func NewBatchVisitorRoot(cacheLength int, cb IMultiValue) *LRU {
db := newChainbaseAdapter(cb)
lruDB := NewLRU(cacheLength, db)
return lruDB
}
// Mapper generator of conflict map
type Mapper interface {
Map() map[string]Access
}
// NewBatchVisitor get visitor with mapper
func NewBatchVisitor(lruDB *LRU) (*Visitor, Mapper) {
cachedDB := NewWriteCache(lruDB)
watcher := NewWatcher(cachedDB)
v := &Visitor{
BasicHandler: BasicHandler{watcher},
MapHandler: MapHandler{watcher},
ContractHandler: ContractHandler{watcher},
TokenHandler: TokenHandler{watcher},
RAMHandler: RAMHandler{watcher},
}
v.GasHandler = GasHandler{v.BasicHandler, v.MapHandler}
v.RollbackHandler = newRollbackHandler(lruDB, cachedDB)
return v, watcher
}