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Complete first alpha version

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This commit is contained in:
Daniel 2018-12-12 19:18:49 +01:00
parent c399d7c748
commit 1ef3ceb274
22 changed files with 299 additions and 159 deletions
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38
database/controller.go
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@ -13,22 +13,27 @@ import (
// A Controller takes care of all the extra database logic.
type Controller struct {
storage storage.Interface
storage storage.Interface
hooks []*RegisteredHook
hooks []*RegisteredHook
subscriptions []*Subscription
writeLock sync.RWMutex
readLock sync.RWMutex
migrating *abool.AtomicBool // TODO
// Lock: nobody may write
// RLock: concurrent writing
readLock sync.RWMutex
// Lock: nobody may read
// RLock: concurrent reading
migrating *abool.AtomicBool // TODO
hibernating *abool.AtomicBool // TODO
}
// newController creates a new controller for a storage.
func newController(storageInt storage.Interface) (*Controller, error) {
return &Controller{
storage: storageInt,
migrating: abool.NewBool(false),
storage: storageInt,
migrating: abool.NewBool(false),
hibernating: abool.NewBool(false),
}, nil
}
@ -101,9 +106,6 @@ func (c *Controller) Put(r record.Record) (err error) {
return ErrReadOnly
}
r.Lock()
defer r.Unlock()
// process hooks
for _, hook := range c.hooks {
if hook.h.UsesPrePut() && hook.q.Matches(r) {
@ -160,6 +162,9 @@ func (c *Controller) Query(q *query.Query, local, internal bool) (*iterator.Iter
// PushUpdate pushes a record update to subscribers.
func (c *Controller) PushUpdate(r record.Record) {
if c != nil {
c.readLock.RLock()
defer c.readLock.RUnlock()
for _, sub := range c.subscriptions {
if r.Meta().CheckPermission(sub.local, sub.internal) && sub.q.Matches(r) {
select {
@ -171,19 +176,28 @@ func (c *Controller) PushUpdate(r record.Record) {
}
}
func (c *Controller) addSubscription(sub *Subscription) {
c.readLock.Lock()
defer c.readLock.Unlock()
c.writeLock.Lock()
defer c.writeLock.Unlock()
c.subscriptions = append(c.subscriptions, sub)
}
func (c *Controller) readUnlockerAfterQuery(it *iterator.Iterator) {
<- it.Done
<-it.Done
c.readLock.RUnlock()
}
// Maintain runs the Maintain method no the storage.
// Maintain runs the Maintain method on the storage.
func (c *Controller) Maintain() error {
c.writeLock.RLock()
defer c.writeLock.RUnlock()
return c.storage.Maintain()
}
// MaintainThorough runs the MaintainThorough method no the storage.
// MaintainThorough runs the MaintainThorough method on the storage.
func (c *Controller) MaintainThorough() error {
c.writeLock.RLock()
defer c.writeLock.RUnlock()