83 lines
2.5 KiB
Go
83 lines
2.5 KiB
Go
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package core
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import (
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"github.com/CityOfZion/neo-go/pkg/core/state"
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"github.com/CityOfZion/neo-go/pkg/core/storage"
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"github.com/CityOfZion/neo-go/pkg/util"
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)
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// cachedDao is a data access object that mimics dao, but has a write cache
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// for accounts and read cache for contracts. These are the most frequently used
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// objects in the storeBlock().
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type cachedDao struct {
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dao
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accounts map[util.Uint160]*state.Account
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contracts map[util.Uint160]*state.Contract
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}
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// newCachedDao returns new cachedDao wrapping around given backing store.
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func newCachedDao(backend storage.Store) *cachedDao {
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accs := make(map[util.Uint160]*state.Account)
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ctrs := make(map[util.Uint160]*state.Contract)
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return &cachedDao{*newDao(backend), accs, ctrs}
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}
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// GetAccountStateOrNew retrieves Account from cache or underlying Store
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// or creates a new one if it doesn't exist.
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func (cd *cachedDao) GetAccountStateOrNew(hash util.Uint160) (*state.Account, error) {
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if cd.accounts[hash] != nil {
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return cd.accounts[hash], nil
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}
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return cd.dao.GetAccountStateOrNew(hash)
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}
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// GetAccountState retrieves Account from cache or underlying Store.
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func (cd *cachedDao) GetAccountState(hash util.Uint160) (*state.Account, error) {
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if cd.accounts[hash] != nil {
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return cd.accounts[hash], nil
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}
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return cd.dao.GetAccountState(hash)
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}
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// PutAccountState saves given Account in the cache.
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func (cd *cachedDao) PutAccountState(as *state.Account) error {
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cd.accounts[as.ScriptHash] = as
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return nil
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}
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// GetContractState returns contract state from cache or underlying Store.
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func (cd *cachedDao) GetContractState(hash util.Uint160) (*state.Contract, error) {
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if cd.contracts[hash] != nil {
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return cd.contracts[hash], nil
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}
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cs, err := cd.dao.GetContractState(hash)
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if err == nil {
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cd.contracts[hash] = cs
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}
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return cs, err
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}
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// PutContractState puts given contract state into the given store.
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func (cd *cachedDao) PutContractState(cs *state.Contract) error {
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cd.contracts[cs.ScriptHash()] = cs
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return cd.dao.PutContractState(cs)
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}
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// DeleteContractState deletes given contract state in cache and backing Store.
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func (cd *cachedDao) DeleteContractState(hash util.Uint160) error {
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cd.contracts[hash] = nil
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return cd.dao.DeleteContractState(hash)
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}
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// Persist flushes all the changes made into the (supposedly) persistent
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// underlying store.
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func (cd *cachedDao) Persist() (int, error) {
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for sc := range cd.accounts {
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err := cd.dao.PutAccountState(cd.accounts[sc])
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if err != nil {
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return 0, err
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}
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}
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return cd.dao.Persist()
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}
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