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markets_data.go
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markets_data.go
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// Copyright (C) 2023 Gobalsky Labs Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package services
import (
"context"
"sync"
"code.vegaprotocol.io/vega/core/events"
"code.vegaprotocol.io/vega/core/subscribers"
vegapb "code.vegaprotocol.io/vega/protos/vega"
)
type marketDataE interface {
events.Event
MarketData() vegapb.MarketData
}
type MarketsData struct {
*subscribers.Base
ctx context.Context
mu sync.RWMutex
marketsData map[string]vegapb.MarketData
ch chan vegapb.MarketData
}
func NewMarketsData(ctx context.Context) (marketsData *MarketsData) {
defer func() { go marketsData.consume() }()
return &MarketsData{
Base: subscribers.NewBase(ctx, 1000, true),
ctx: ctx,
marketsData: map[string]vegapb.MarketData{},
ch: make(chan vegapb.MarketData, 100),
}
}
func (m *MarketsData) consume() {
defer func() { close(m.ch) }()
for {
select {
case <-m.Closed():
return
case marketData, ok := <-m.ch:
if !ok {
// cleanup base
m.Halt()
// channel is closed
return
}
m.mu.Lock()
m.marketsData[marketData.Market] = marketData
m.mu.Unlock()
}
}
}
func (m *MarketsData) Push(evts ...events.Event) {
for _, e := range evts {
if ae, ok := e.(marketDataE); ok {
m.ch <- ae.MarketData()
}
}
}
func (m *MarketsData) List(marketID string) []*vegapb.MarketData {
m.mu.RLock()
defer m.mu.RUnlock()
if len(marketID) > 0 {
return m.getMarketData(marketID)
}
return m.getAllMarketsData()
}
func (m *MarketsData) getMarketData(marketID string) []*vegapb.MarketData {
out := []*vegapb.MarketData{}
asset, ok := m.marketsData[marketID]
if ok {
out = append(out, &asset)
}
return out
}
func (m *MarketsData) getAllMarketsData() []*vegapb.MarketData {
out := make([]*vegapb.MarketData, 0, len(m.marketsData))
for _, v := range m.marketsData {
v := v
out = append(out, &v)
}
return out
}
func (m *MarketsData) Types() []events.Type {
return []events.Type{
events.MarketDataEvent,
}
}