func changeFeedHelper(cursor *r.Cursor, changeEventName string,
send chan<- Message, stop <-chan bool) {
change := make(chan r.ChangeResponse)
cursor.Listen(change)
for {
eventName := ""
var data interface{}
select {
case <-stop:
cursor.Close()
return
case val := <-change:
if val.NewValue != nil && val.OldValue == nil {
eventName = changeEventName + " add"
data = val.NewValue
} else if val.NewValue == nil && val.OldValue != nil {
eventName = changeEventName + " remove"
data = val.OldValue
} else if val.NewValue != nil && val.OldValue != nil {
eventName = changeEventName + " edit"
data = val.NewValue
}
send <- Message{eventName, data}
}
}
}
func createSubscription(cursor *r.Cursor, client *Client, entityName string, stopKey int) {
recordChan := make(chan r.ChangeResponse)
cursor.Listen(recordChan)
stopChan := client.NewStopChannel(stopKey)
go func() {
for {
select {
case <-stopChan:
cursor.Close()
return
case change := <-recordChan:
var command string
var data interface{}
if change.NewValue != nil && change.OldValue == nil {
command = entityName + " add"
data = change.NewValue
}
if change.NewValue == nil && change.OldValue != nil {
command = entityName + " remove"
data = change.OldValue
fmt.Println("sent '" + entityName + " remove' msg")
}
if change.NewValue != nil && change.OldValue != nil {
command = entityName + " edit"
data = change.NewValue
}
client.send <- SocketMessage{command, data}
fmt.Println("sent '"+command+"' msg ", data)
}
}
}()
}
func printResult(result *r.Cursor) {
var kv map[string]interface{}
i := 0
for result.Next(&kv) {
fmt.Println("result", i)
fmt.Println(kv)
i = i + 1
}
}
func processMultipleCursor(
cursor *gorethink.Cursor,
messageConstructor func() proto.Message,
) ([]interface{}, error) {
var data []string
if err := cursor.All(&data); err != nil {
return nil, err
}
result := make([]interface{}, len(data))
for i, datum := range data {
message := messageConstructor()
if err := jsonpb.UnmarshalString(datum, message); err != nil {
return nil, err
}
result[i] = message
}
return result, nil
}
func (d *dbService) GetUser(email string, isApp bool, appId string) (user models.JSON, err error) {
var c *r.Cursor
if isApp {
c, err = d.Run(
d.Db().Table(APPS_USERS_TABLE).GetAllByIndex(APPS_USERS_TABLE_EMAILAPPID_INDEX, []interface{}{email, appId}).Nth(0),
)
} else {
c, err = d.Run(
d.Db().Table(USERS_TABLE).GetAllByIndex(USERS_TABLE_EMAIL_INDEX, email).Nth(0),
)
}
if err != nil {
return
}
err = c.One(&user)
return
}
func InitDB(dbName string) (session *r.Session, err error) {
var cursor *r.Cursor
session, err = r.Connect(r.ConnectOpts{
Address: os.Getenv("RETHINKDB_URL"),
Database: dbName,
MaxIdle: 10,
Timeout: time.Second * 10,
})
if err != nil {
l.Println("Connect", err)
return
}
cursor, err = r.DBList().Contains(dbName).Do(func(row r.Term) r.Term {
return r.Branch(
row.Eq(true),
nil,
r.DBCreate(dbName),
)
}).Run(session)
defer cursor.Close()
for _, table := range tables {
cursor, err = r.DB(dbName).TableList().Contains(table.name).Do(func(row r.Term) r.Term {
return r.Branch(
row.Eq(true),
nil,
r.DB(dbName).TableCreate(table.name, table.options),
)
}).Run(session)
defer cursor.Close()
if err != nil {
return
}
}
return
}
func packageCursorToUrl(c *r.Cursor) (UrlMap, error) {
rows := []UrlMap{}
err := c.All(&rows)
return rows[0], err
}
func (bmo *BMO) Compute(input *os.File) {
var err error
var cur *r.Cursor
var session *r.Session
// set up database connection pool
session, err = r.Connect(r.ConnectOpts{
Addresses: bmo.nodes,
Database: bmo.database,
DiscoverHosts: true,
})
session.SetMaxOpenConns(POOL_SIZE)
if err != nil {
log.Fatalln(err)
}
// ensure table is present
var tableNames []string
cur, err = r.DB(bmo.database).TableList().Run(session)
if err != nil {
log.Fatalln(err)
}
cur.All(&tableNames)
set := make(map[string]bool)
for _, v := range tableNames {
set[v] = true
}
if !set[bmo.table] {
log.Println("Creating table ", bmo.table)
_, err = r.DB(bmo.database).TableCreate(bmo.table).RunWrite(session)
if err != nil {
log.Fatalln("Error creating table: ", err)
os.Exit(1)
}
}
// deliver the messages
decoder := json.NewDecoder(input)
ms := make([]Message, INSERT_BATCH_SIZE)
var m *Message
var i uint64
var ignoreLast bool
pool, _ := tunny.CreatePoolGeneric(POOL_SIZE).Open()
defer pool.Close()
table := r.Table(bmo.table)
insertOptions := r.InsertOpts{Durability: "soft"}
insert := func() {
j := i
if !ignoreLast {
j += 1
}
_, err = table.Insert(ms[:j], insertOptions).RunWrite(session)
if err != nil {
log.Fatal(err)
os.Exit(1)
}
}
for {
i = bmo.seq % INSERT_BATCH_SIZE
m = &ms[i]
err = decoder.Decode(&m)
switch {
case err == io.EOF:
ignoreLast = true
pool.SendWork(insert)
return
case err != nil:
ignoreLast = true
pool.SendWork(insert)
log.Fatal("Can't parse json input, \"", err, "\". Object #", bmo.seq, ", after ", m)
os.Exit(1)
default:
if i+1 == INSERT_BATCH_SIZE {
ignoreLast = false
pool.SendWork(insert)
}
}
bmo.seq += 1
}
}