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markets.go
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markets.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 marketE interface {
events.Event
Market() vegapb.Market
}
type Markets struct {
*subscribers.Base
ctx context.Context
mu sync.RWMutex
markets map[string]vegapb.Market
ch chan vegapb.Market
}
func NewMarkets(ctx context.Context) (markets *Markets) {
defer func() { go markets.consume() }()
return &Markets{
Base: subscribers.NewBase(ctx, 1000, true),
ctx: ctx,
markets: map[string]vegapb.Market{},
ch: make(chan vegapb.Market, 100),
}
}
func (m *Markets) consume() {
defer func() { close(m.ch) }()
for {
select {
case <-m.Closed():
return
case market, ok := <-m.ch:
if !ok {
// cleanup base
m.Halt()
// channel is closed
return
}
m.mu.Lock()
m.markets[market.Id] = market
m.mu.Unlock()
}
}
}
func (m *Markets) Push(evts ...events.Event) {
for _, e := range evts {
if ae, ok := e.(marketE); ok {
m.ch <- ae.Market()
}
}
}
func (m *Markets) List(marketID string) []*vegapb.Market {
m.mu.RLock()
defer m.mu.RUnlock()
if len(marketID) > 0 {
return m.getMarket(marketID)
}
return m.getAllMarkets()
}
func (m *Markets) getMarket(marketID string) []*vegapb.Market {
out := []*vegapb.Market{}
asset, ok := m.markets[marketID]
if ok {
out = append(out, &asset)
}
return out
}
func (m *Markets) getAllMarkets() []*vegapb.Market {
out := make([]*vegapb.Market, 0, len(m.markets))
for _, v := range m.markets {
v := v
out = append(out, &v)
}
return out
}
func (m *Markets) Types() []events.Type {
return []events.Type{
events.MarketCreatedEvent,
events.MarketUpdatedEvent,
}
}