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tetris experiments

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This commit is contained in:
thomashamburg 2025-10-19 10:06:33 +02:00
parent 78d36b4178
commit 36fb1906ba
7 changed files with 150 additions and 119 deletions
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22
lcars_v3/embed/create_state_db.sql
View File

@ -2,7 +2,9 @@ CREATE TABLE ship_messages (
id INTEGER PRIMARY KEY AUTOINCREMENT,
timestamp TEXT NOT NULL,
subsystem TEXT NOT NULL,
severity TEXT CHECK(severity IN ('CRITICAL', 'ALERT', 'WARNING', 'NOTICE', 'INFO')) NOT NULL DEFAULT 'INFO',
severity TEXT CHECK(
severity IN ('CRITICAL', 'ALERT', 'WARNING', 'NOTICE', 'INFO')
) NOT NULL DEFAULT 'INFO',
color TEXT NOT NULL,
message TEXT NOT NULL
);
@ -11,4 +13,20 @@ CREATE TABLE crew_member (
id INTEGER PRIMARY KEY AUTOINCREMENT,
rank TEXT NOT NULL,
name TEXT NOT NULL
);
);
CREATE TABLE roster (
id INTEGER PRIMARY KEY AUTOINCREMENT,
crew_id INTEGER NOT NULL,
on_duty timestamp,
off_duty timestamp,
FOREIGN KEY (crew_id) REFERENCES crew_member(id)
);
CREATE TABLE events (
id INTEGER PRIMARY KEY AUTOINCREMENT,
created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
event_type TEXT NOT NULL,
event_data JSON NOT NULL
);

210
lcars_v3/eventbus/eventbus.go
View File

@ -1,6 +1,5 @@
// modified version, see original:
// https://github.com/dtomasi/go-event-bus/blob/main/event_bus.go
// https://github.com/dtomasi/go-event-bus/tree/main
package eventbus
@ -9,12 +8,108 @@ import (
"sync/atomic"
)
type Rec map[string]interface{}
type Data map[string]interface{}
// SafeCounter is a concurrency safe counter.
type SafeCounter struct {
v *uint64
}
// NewSafeCounter creates a new counter.
func NewSafeCounter() *SafeCounter {
return &SafeCounter{
v: new(uint64),
}
}
// Value returns the current value.
func (c *SafeCounter) Value() int {
return int(atomic.LoadUint64(c.v))
}
// IncBy increments the counter by given delta.
func (c *SafeCounter) IncBy(add uint) {
atomic.AddUint64(c.v, uint64(add))
}
// Inc increments the counter by 1.
func (c *SafeCounter) Inc() {
c.IncBy(1)
}
// DecBy decrements the counter by given delta.
func (c *SafeCounter) DecBy(dec uint) {
atomic.AddUint64(c.v, ^uint64(dec-1))
}
// Dec decrements the counter by 1.
func (c *SafeCounter) Dec() {
c.DecBy(1)
}
type TopicStats struct {
Name string
PublishedCount *SafeCounter
SubscriberCount *SafeCounter
}
type topicStatsMap map[string]*TopicStats
type Stats struct {
data topicStatsMap
}
func newStats() *Stats {
return &Stats{
data: map[string]*TopicStats{},
}
}
func (s *Stats) getOrCreateTopicStats(topicName string) *TopicStats {
_, ok := s.data[topicName]
if !ok {
s.data[topicName] = &TopicStats{
Name: topicName,
PublishedCount: NewSafeCounter(),
SubscriberCount: NewSafeCounter(),
}
}
return s.data[topicName]
}
func (s *Stats) incSubscriberCountByTopic(topicName string) {
s.getOrCreateTopicStats(topicName).SubscriberCount.Inc()
}
func (s *Stats) GetSubscriberCountByTopic(topicName string) int {
return s.getOrCreateTopicStats(topicName).SubscriberCount.Value()
}
func (s *Stats) incPublishedCountByTopic(topicName string) {
s.getOrCreateTopicStats(topicName).PublishedCount.Inc()
}
func (s *Stats) GetPublishedCountByTopic(topicName string) int {
return s.getOrCreateTopicStats(topicName).PublishedCount.Value()
}
func (s *Stats) GetTopicStats() []*TopicStats {
var tStatsSlice []*TopicStats
for _, tStats := range s.data {
tStatsSlice = append(tStatsSlice, tStats)
}
return tStatsSlice
}
func (s *Stats) GetTopicStatsByName(topicName string) *TopicStats {
return s.getOrCreateTopicStats(topicName)
}
// Event holds topic name and data.
type Event struct {
Data Rec
Data Data
Topic string
wg *sync.WaitGroup
}
@ -27,7 +122,7 @@ func (e *Event) Done() {
}
// CallbackFunc Defines a CallbackFunc.
type CallbackFunc func(topic string, data Rec)
type CallbackFunc func(topic string, data Data)
// EventChannel is a channel which can accept an Event.
type EventChannel chan Event
@ -116,7 +211,7 @@ func deepMatchRune(str, pattern []rune, simple bool) bool { //nolint:unparam
// PublishAsync data to a topic asynchronously
// This function returns a bool channel which indicates that all subscribers where called.
func (eb *EventBus) PublishAsync(topic string, data Rec) {
func (eb *EventBus) PublishAsync(topic string, data Data) {
eb.doPublish(
eb.getSubscribingChannels(topic),
Event{
@ -129,7 +224,7 @@ func (eb *EventBus) PublishAsync(topic string, data Rec) {
}
// PublishAsyncOnce same as PublishAsync but makes sure that topic is only published once.
func (eb *EventBus) PublishAsyncOnce(topic string, data Rec) {
func (eb *EventBus) PublishAsyncOnce(topic string, data Data) {
if eb.stats.GetPublishedCountByTopic(topic) > 0 {
return
}
@ -139,7 +234,7 @@ func (eb *EventBus) PublishAsyncOnce(topic string, data Rec) {
// Publish data to a topic and wait for all subscribers to finish
// This function creates a waitGroup internally. All subscribers must call Done() function on Event.
func (eb *EventBus) Publish(topic string, data Rec) Rec {
func (eb *EventBus) Publish(topic string, data Data) interface{} {
wg := sync.WaitGroup{}
channels := eb.getSubscribingChannels(topic)
wg.Add(len(channels))
@ -158,7 +253,7 @@ func (eb *EventBus) Publish(topic string, data Rec) Rec {
}
// PublishOnce same as Publish but makes sure only published once on topic.
func (eb *EventBus) PublishOnce(topic string, data Rec) Rec {
func (eb *EventBus) PublishOnce(topic string, data Data) interface{} {
if eb.stats.GetPublishedCountByTopic(topic) > 0 {
return nil
}
@ -213,100 +308,3 @@ func (eb *EventBus) HasSubscribers(topic string) bool {
func (eb *EventBus) Stats() *Stats {
return eb.stats
}
type TopicStats struct {
Name string
PublishedCount *SafeCounter
SubscriberCount *SafeCounter
}
type topicStatsMap map[string]*TopicStats
type Stats struct {
data topicStatsMap
}
func newStats() *Stats {
return &Stats{
data: map[string]*TopicStats{},
}
}
func (s *Stats) getOrCreateTopicStats(topicName string) *TopicStats {
_, ok := s.data[topicName]
if !ok {
s.data[topicName] = &TopicStats{
Name: topicName,
PublishedCount: NewSafeCounter(),
SubscriberCount: NewSafeCounter(),
}
}
return s.data[topicName]
}
func (s *Stats) incSubscriberCountByTopic(topicName string) {
s.getOrCreateTopicStats(topicName).SubscriberCount.Inc()
}
func (s *Stats) GetSubscriberCountByTopic(topicName string) int {
return s.getOrCreateTopicStats(topicName).SubscriberCount.Value()
}
func (s *Stats) incPublishedCountByTopic(topicName string) {
s.getOrCreateTopicStats(topicName).PublishedCount.Inc()
}
func (s *Stats) GetPublishedCountByTopic(topicName string) int {
return s.getOrCreateTopicStats(topicName).PublishedCount.Value()
}
func (s *Stats) GetTopicStats() []*TopicStats {
var tStatsSlice []*TopicStats
for _, tStats := range s.data {
tStatsSlice = append(tStatsSlice, tStats)
}
return tStatsSlice
}
func (s *Stats) GetTopicStatsByName(topicName string) *TopicStats {
return s.getOrCreateTopicStats(topicName)
}
// SafeCounter is a concurrency safe counter.
type SafeCounter struct {
v *uint64
}
// NewSafeCounter creates a new counter.
func NewSafeCounter() *SafeCounter {
return &SafeCounter{
v: new(uint64),
}
}
// Value returns the current value.
func (c *SafeCounter) Value() int {
return int(atomic.LoadUint64(c.v))
}
// IncBy increments the counter by given delta.
func (c *SafeCounter) IncBy(add uint) {
atomic.AddUint64(c.v, uint64(add))
}
// Inc increments the counter by 1.
func (c *SafeCounter) Inc() {
c.IncBy(1)
}
// DecBy decrements the counter by given delta.
func (c *SafeCounter) DecBy(dec uint) {
atomic.AddUint64(c.v, ^uint64(dec-1))
}
// Dec decrements the counter by 1.
func (c *SafeCounter) Dec() {
c.DecBy(1)
}

1
lcars_v3/go.mod
View File

@ -10,7 +10,6 @@ require (
github.com/mattn/go-isatty v0.0.20 // indirect
github.com/ncruces/go-strftime v0.1.9 // indirect
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
github.com/starfederation/datastar-go v1.0.2 // indirect
golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b // indirect
golang.org/x/sys v0.34.0 // indirect
modernc.org/libc v1.66.3 // indirect

2
lcars_v3/go.sum
View File

@ -10,8 +10,6 @@ github.com/ncruces/go-strftime v0.1.9 h1:bY0MQC28UADQmHmaF5dgpLmImcShSi2kHU9XLdh
github.com/ncruces/go-strftime v0.1.9/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
github.com/starfederation/datastar-go v1.0.2 h1:DrIqBX5jx3nioYwe9mCbtTT/CvJLosFrYbaqaEqfiGY=
github.com/starfederation/datastar-go v1.0.2/go.mod h1:stm83LQkhZkwa5GzzdPEN6dLuu8FVwxIv0w1DYkbD3w=
golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b h1:M2rDM6z3Fhozi9O7NWsxAkg/yqS/lQJ6PmkyIV3YP+o=
golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b/go.mod h1:3//PLf8L/X+8b4vuAfHzxeRUl04Adcb341+IGKfnqS8=
golang.org/x/mod v0.25.0 h1:n7a+ZbQKQA/Ysbyb0/6IbB1H/X41mKgbhfv7AfG/44w=

16
lcars_v3/main.go
View File

@ -51,6 +51,10 @@ func main() {
fmt.Println("------------------")
}, 10)
interval.SetInterval(func() {
ebus.Publish("foo:baz", eventbus.Data{"value": "Hallo Welt"})
}, 100)
runEventbus(ebus)
run()
@ -99,12 +103,12 @@ func runEventbus(ebus *eventbus.EventBus) {
for i := 0; i < 1000; i++ {
ebus.Publish("foo:baz", eventbus.Rec{"value": i})
ebus.Publish("pups-klo", eventbus.Rec{"value": i})
ebus.Publish("pups-klo", eventbus.Rec{"value": i})
ebus.Publish("ömmels", eventbus.Rec{"value": i})
ebus.Publish("ömmels", eventbus.Rec{"value": i * 10})
ebus.Publish("ömmels", eventbus.Rec{"value": i * 100})
ebus.Publish("foo:baz", eventbus.Data{"value": i})
ebus.Publish("pups-klo", eventbus.Data{"value": i})
ebus.Publish("pups-klo", eventbus.Data{"value": i})
ebus.Publish("ömmels", eventbus.Data{"value": i})
ebus.Publish("ömmels", eventbus.Data{"value": i * 10})
ebus.Publish("ömmels", eventbus.Data{"value": i * 100})
}
}

16
lcars_v3/sqlite/database.go
View File

@ -31,6 +31,14 @@ func New(DBName string) (*Database, error) {
}
func (d *Database) Close() error {
query := `
PRAGMA analysis_limit = 400;
PRAGMA optimize;
`
_, err := d.DB().Exec(query)
if err != nil {
return err
}
return d.database.Close()
}
@ -69,10 +77,14 @@ func openSqliteDB(databasefilename string) (*sql.DB, error) {
func createDB(dbfileName string) (*sql.DB, error) {
query := `
PRAGMA page_size = 4096;
PRAGMA synchronous = off;
PRAGMA foreign_keys = off;
PRAGMA foreign_keys = on;
PRAGMA journal_mode = WAL;
PRAGMA busy_timeout = 5000;
PRAGMA cache_size = 2000;
PRAGMA temp_store = memory;
PRAGMA mmap_size = 30000000000;
PRAGMA page_size = 4096;
PRAGMA user_version = 1;
`
db, err := sql.Open("sqlite", dbfileName)

2
lcars_v3/state/events.go Normal file
View File

@ -0,0 +1,2 @@
package state