/
adapter.go
81 lines (65 loc) · 1.78 KB
/
adapter.go
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package pipes
import (
"sync"
"github.com/dgraph-io/ristretto"
)
type Adapter struct {
ID string // Identifier of the client
Mutex *sync.Mutex // Mutex to prevent concurrent sending (WHY DO I NEED TO DO THIS??)
Data interface{} // Custom data (not required)
// Functions
Receive func(*Context) error
}
type Context struct {
Event *Event
Message []byte
Adapter *Adapter
}
func (node *LocalNode) setupCaching() {
var err error
node.websocketCache, err = ristretto.NewCache(&ristretto.Config{
NumCounters: 1e7, // number of keys to track frequency of (10M).
MaxCost: 1 << 30, // maximum cost of cache (1GB).
BufferItems: 64,
})
if err != nil {
panic(err)
}
}
// Register a new adapter for websocket/sl (all safe protocols)
func (node *LocalNode) AdaptWS(adapter Adapter) {
if adapter.Mutex == nil {
adapter.Mutex = &sync.Mutex{}
}
if node.websocketCache == nil {
panic("Please call adapter.SetupCaching() before using the adapter package")
}
_, ok := node.websocketCache.Get(adapter.ID)
if ok {
node.websocketCache.Del(adapter.ID)
Log.Printf("[ws] Replacing adapter for target %s \n", adapter.ID)
}
node.websocketCache.Set(adapter.ID, &adapter, 1)
}
// Remove a websocket/sl adapter
func (node *LocalNode) RemoveAdapterWS(ID string) {
node.websocketCache.Del(ID)
}
// Handles receiving messages from the target and passes them to the adapter
func (node *LocalNode) AdapterReceiveWeb(ID string, event Event, msg []byte) {
obj, ok := node.websocketCache.Get(ID)
if !ok {
return
}
adapter := obj.(*Adapter)
adapter.Mutex.Lock()
err := adapter.Receive(&Context{
Event: &event,
Message: msg,
Adapter: adapter,
})
adapter.Mutex.Unlock()
if err != nil {
Log.Printf("[ws] Error receiving message from target %s: %s \n", ID, err)
}
}