func (q *Query) Delete() (int, error) {
res, err := q.eval()
if err != nil {
log.Errorf("Error executing kv.Query.Delete() query=%s err=%s", q.JSON(), err.Error())
return -1, err
}
for id, _ := range res {
q.col.Delete(id)
log.V(6).Info("Deleted id=%d")
}
log.V(5).Info("Deleted %d objects for query=%s", len(res), q.JSON())
return len(res), nil
}
func incrCount(tde *kv.TiedotEngine) int64 {
mu.Lock()
defer mu.Unlock()
counter := new(Counter)
id, err := tde.Query(counterCollection).Has(kv.Path{"Count"}).OneInto(counter)
if err == kv.ErrNotFound {
log.Warning("Counter not found, saving new one.")
_, err = tde.Insert(counterCollection, Counter{Count: 1})
if err != nil {
log.Errorf("Error saving new counter err=%s", err.Error())
}
r, err := tde.All(counterCollection)
log.V(3).Infof("total of %d results=%v, err=%v", len(r), r, err)
return 1
}
if err != nil {
log.Error("Failure getting counter err:" + err.Error())
panic(err)
}
counter.Count++
err = tde.Update(counterCollection, id, counter)
if err != nil {
log.Error("Failure updating counter err:" + err.Error())
panic(err)
}
return counter.Count
}
func (q *Query) OneInto(out interface{}) (uint64, error) {
r, err := q.eval()
if err != nil {
log.Errorf("Error executing kv.Query.One() err=%s", err.Error())
return 0, err
}
for k, _ := range r {
log.V(2).Infof("Found id=%d kv.Query.OneInto()", k)
if _, err := q.col.Read(k, out); err != nil {
log.Errorf("Failure reading id=%d err=%s", k, err.Error())
return 0, err
}
return k, nil
}
log.V(1).Infof("Nothing found for query=%s", q.JSON())
return 0, ErrNotFound
}
func (t *TiedotEngine) Insert(collectionName string, item Insertable) (uint64, error) {
if len(item.ToM()) == 0 {
log.Warningf("Failure: No data in item=%v", item.ToM())
return 0, nil
} else {
log.V(3).Infof("Insertion into collection=%s item=%v",
collectionName, item.ToM())
}
id, err := t.tiedot.Use(collectionName).Insert(item.ToM())
if err != nil {
log.Errorf("Failure inserting item=%v err=%s", item.ToM(), err.Error())
return 0, err
} else {
log.V(6).Infof("Added item with ID=%d, item=%v", id, item.ToM())
return id, nil
}
}
func countHits(tde *kv.TiedotEngine) {
var key string
for {
key = <-hits
newHitCount := incrHits(tde, key)
log.V(3).Infof("[HIT]: key=%s count=%d", key, newHitCount)
}
}
func (q *Query) One() (uint64, interface{}, error) {
r, err := q.eval()
if err != nil {
log.Errorf("Error executing kv.Query.One() err=%s", err.Error())
return 0, nil, err
}
for id, _ := range r {
v, err := q.read(id)
if err != nil {
log.Errorf("Failure reading id=%d err=%v", id, err)
return id, nil, err
}
log.V(2).Infof("Found id=%d val=%v for kv.Query.One()", id, v)
return id, v, nil
}
log.V(1).Infof("Nothing found for query=%v", q.JSON())
return 0, nil, ErrNotFound
}
func (t *TiedotEngine) Update(collectionName string, id uint64, item Insertable) error {
err := t.tiedot.Use(collectionName).Update(id, item.ToM())
if err != nil {
log.Errorf("Failure updating item=%s err=%s", item.ToM().JSON(), err.Error())
} else {
log.V(3).Infof("Updating with data: %v", item.ToM())
}
return err
}
func retrieve(w http.ResponseWriter, r *http.Request, tde *kv.TiedotEngine, params martini.Params) {
short := params["short"]
domain, err := LongURL(short, tde)
if err == kv.ErrNotFound {
log.V(1).Info("Path /" + short + " not found")
w.WriteHeader(http.StatusNotFound)
return
}
if len(domain.Original) > 0 {
log.V(3).Info("[INFO]: Served /" + short + " redirect to " + domain.Original)
http.Redirect(w, r, domain.Original, http.StatusFound)
hits <- short
return
}
log.Error("retrieving long URL err:" + err.Error())
w.WriteHeader(500)
if err != nil {
w.Write(M{"error": err.Error()}.JSON())
}
}
func (t *TiedotEngine) AddIndex(collection string, path Path) {
c := t.tiedot.Use(collection)
tdPath := strings.Join(path, tiedot.INDEX_PATH_SEP)
if _, ok := c.SecIndexes[tdPath]; ok {
log.Infof("Index on path:%v already exists for collection:%s", tdPath, collection)
return
}
log.V(3).Infof("Adding index on path:%v to collection:%s", tdPath, collection)
err := c.Index(path)
log.FatalIfErr(err, "Failure creating index on collection:"+collection)
}
func remove(w http.ResponseWriter, r *http.Request, tde *kv.TiedotEngine, params martini.Params) (int, []byte) {
short := params["short"]
_, err := tde.Query(urlCollection).Equals(kv.Path{"Short"}, base62.DecodeString(short)).Delete()
if err != nil {
log.Error("Failure deleting URL /" + short + " err:" + err.Error())
return 500, M{
"message": "Could not delete URL /" + short,
"error": err.Error(),
}.JSON()
}
log.V(1).Info("Deleted URL /" + short)
return 200, M{
"deleted": M{"short": short},
}.JSON()
}
// Create a new LevelDBEngine with the given file and options
func NewTiedotEngine(directory string, collections []string, dropPref DropPreference) *TiedotEngine {
db, err := tiedot.OpenDB(directory)
log.FatalIfErr(err, "Failure opening tiedot basedir err:")
for _, c := range collections {
if _, ok := db.StrCol[c]; ok {
log.V(4).Info("Collection %s already exists")
if dropPref == DropIfExist {
log.Info("Dropping collection %s due to dropIfExist option")
err = db.Drop(c)
log.FatalIfErr(err, "Failure dropping collection with name:%s err:", c)
err = db.Create(c, 1) // partition DB for use by up to 1 goroutines at a time
log.FatalIfErr(err, "Failure creating collection with name:%s err:", c)
}
} else {
log.V(4).Info("Creating collection %s")
err = db.Create(c, 1) // partition DB for use by up to 1 goroutines at a time
log.FatalIfErr(err, "Failure creating collection with name:%s err:", c)
}
}
tde := &TiedotEngine{
tiedot: db,
}
return tde
}
func (q *Query) Equals(p Path, v interface{}) *Query {
log.V(6).Infof("QueryBuilder: Path=%v Term=%v Value=%v", p, "Equals", v)
q.q = append(q.q, M{"in": p, "eq": v})
return q
}
func (q *Query) Has(p Path) *Query {
log.V(6).Infof("QueryBuilder: HasPath=%v", p)
q.q = append(q.q, M{"has": p})
return q
}
func (q *Query) Regexp(p Path, expr string) *Query {
log.V(6).Infof("QueryBuilder: Path=%v Regexp=%s", p, expr)
q.q = append(q.q, M{"in": p, "re": expr})
return q
}
func (q *Query) Between(p Path, start, end int64) *Query {
log.V(6).Infof("QueryBuilder: Path=%v Between %d and %d", p, start, end)
q.q = append(q.q, M{"in": p, "int from": start, "int to": end})
return q
}
func root(w http.ResponseWriter, r *http.Request) (int, string) {
log.V(3).Info("Served Homepage")
return 200, ("Welcome to legowebservices.short URL shortener service.\n" +
"POST to this URL with JSON matching {\"url\":\"some.long.url.com\"}\n")
}
