/
database.go
130 lines (109 loc) · 2.3 KB
/
database.go
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package mock_ms
import (
"sync"
"model/pkg/metapb"
)
type Database struct {
*metapb.DataBase
lock sync.Mutex
// 存放当前的table
tables *TableCache
}
func NewDatabase(db *metapb.DataBase) *Database {
return &Database{
DataBase: db,
tables: NewTableCache(),
}
}
func (db *Database) Name() string {
return db.GetName()
}
// 查找当前的table
func (db *Database) FindTable(name string) (*Table, bool) {
return db.tables.FindTableByName(name)
}
// 查找存在的table
func (db *Database) FindTableById(id uint64) (*Table, bool) {
return db.tables.FindTableById(id)
}
func (db *Database) Lock() {
db.lock.Lock()
}
func (db *Database) UnLock() {
db.lock.Unlock()
}
func (db *Database) AddTable(t *Table) {
db.tables.Add(t)
}
// real delete
func (db *Database) DeleteTableById(id uint64) error {
_, find := db.tables.FindTableById(id)
if !find {
return ErrNotExistTable
}
db.tables.DeleteById(id)
return nil
}
// 仅仅从当前table列表中删除
func (db *Database) DeleteTableByName(name string) error {
db.tables.DeleteByName(name)
return nil
}
func (db *Database) GetAllTable() []*Table {
return db.tables.GetAllTable()
}
type DbCache struct {
lock sync.RWMutex
dbNs map[string]*Database
dbIs map[uint64]*Database
}
func NewDbCache() *DbCache {
return &DbCache{
dbNs: make(map[string]*Database),
dbIs: make(map[uint64]*Database)}
}
func (dc *DbCache) Add(d *Database) {
dc.lock.Lock()
defer dc.lock.Unlock()
dc.dbNs[d.Name()] = d
dc.dbIs[d.GetId()] = d
}
func (dc *DbCache) Delete(name string) {
dc.lock.Lock()
defer dc.lock.Unlock()
if d, find := dc.dbNs[name]; find {
delete(dc.dbNs, name)
delete(dc.dbIs, d.GetId())
return
}
}
func (dc *DbCache) FindDb(name string) (*Database, bool) {
dc.lock.RLock()
defer dc.lock.RUnlock()
if d, find := dc.dbNs[name]; find {
return d, true
}
return nil, false
}
func (dc *DbCache) FindDbById(id uint64) (*Database, bool) {
dc.lock.RLock()
defer dc.lock.RUnlock()
if d, find := dc.dbIs[id]; find {
return d, true
}
return nil, false
}
func (dc *DbCache) GetAllDatabase() []*Database {
dc.lock.RLock()
defer dc.lock.RUnlock()
var dbs []*Database
for _, d := range dc.dbNs {
dbs = append(dbs, d)
}
return dbs
}
func (dc *DbCache) Size() int {
dc.lock.RLock()
defer dc.lock.RUnlock()
return len(dc.dbNs)
}