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Added old filter. Needs some refactoring
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| // XXX This is the old filter system specifically for messages. This is till in used and could use some refactoring | ||
| package filter | ||
|
|
||
| import ( | ||
| "sync" | ||
|
|
||
| "github.com/ethereum/go-ethereum/core" | ||
| "github.com/ethereum/go-ethereum/event" | ||
| "github.com/ethereum/go-ethereum/state" | ||
| ) | ||
|
|
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| type FilterManager struct { | ||
| eventMux *event.TypeMux | ||
|
|
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| filterMu sync.RWMutex | ||
| filterId int | ||
| filters map[int]*core.Filter | ||
|
|
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| quit chan struct{} | ||
| } | ||
|
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| func NewFilterManager(mux *event.TypeMux) *FilterManager { | ||
| return &FilterManager{ | ||
| eventMux: mux, | ||
| filters: make(map[int]*core.Filter), | ||
| } | ||
| } | ||
|
|
||
| func (self *FilterManager) Start() { | ||
| go self.filterLoop() | ||
| } | ||
|
|
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| func (self *FilterManager) Stop() { | ||
| close(self.quit) | ||
| } | ||
|
|
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| func (self *FilterManager) InstallFilter(filter *core.Filter) (id int) { | ||
| self.filterMu.Lock() | ||
| id = self.filterId | ||
| self.filters[id] = filter | ||
| self.filterId++ | ||
| self.filterMu.Unlock() | ||
| return id | ||
| } | ||
|
|
||
| func (self *FilterManager) UninstallFilter(id int) { | ||
| self.filterMu.Lock() | ||
| delete(self.filters, id) | ||
| self.filterMu.Unlock() | ||
| } | ||
|
|
||
| // GetFilter retrieves a filter installed using InstallFilter. | ||
| // The filter may not be modified. | ||
| func (self *FilterManager) GetFilter(id int) *core.Filter { | ||
| self.filterMu.RLock() | ||
| defer self.filterMu.RUnlock() | ||
| return self.filters[id] | ||
| } | ||
|
|
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| func (self *FilterManager) filterLoop() { | ||
| // Subscribe to events | ||
| events := self.eventMux.Subscribe(core.NewBlockEvent{}, state.Messages(nil)) | ||
|
|
||
| out: | ||
| for { | ||
| select { | ||
| case <-self.quit: | ||
| break out | ||
| case event := <-events.Chan(): | ||
| switch event := event.(type) { | ||
| case core.NewBlockEvent: | ||
| self.filterMu.RLock() | ||
| for _, filter := range self.filters { | ||
| if filter.BlockCallback != nil { | ||
| filter.BlockCallback(event.Block) | ||
| } | ||
| } | ||
| self.filterMu.RUnlock() | ||
|
|
||
| case state.Messages: | ||
| self.filterMu.RLock() | ||
| for _, filter := range self.filters { | ||
| if filter.MessageCallback != nil { | ||
| msgs := filter.FilterMessages(event) | ||
| if len(msgs) > 0 { | ||
| filter.MessageCallback(msgs) | ||
| } | ||
| } | ||
| } | ||
| self.filterMu.RUnlock() | ||
| } | ||
| } | ||
| } | ||
| } |