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Merge pull request #1044 from micro/store-namespace

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change use of store namespace/prefix in sql store
This commit is contained in:
Asim Aslam 2019-12-16 12:20:57 +00:00 committed by GitHub
commit 59246e0412
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 79 additions and 18 deletions
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9
store/options.go
View File

@ -4,6 +4,15 @@ import (
"github.com/micro/go-micro/config/options"
)
type Options struct {
// nodes to connect to
Nodes []string
// Namespace of the store
Namespace string
// Prefix of the keys used
Prefix string
}
// Nodes is a list of nodes used to back the store
func Nodes(a ...string) options.Option {
return options.WithValue("store.nodes", a)

35
store/postgresql/postgresql.go
View File

@ -17,18 +17,22 @@ import (
// DefaultNamespace is the namespace that the sql store
// will use if no namespace is provided.
const DefaultNamespace = "micro"
var (
DefaultNamespace = "micro"
DefaultPrefix = "micro"
)
type sqlStore struct {
db *sql.DB
database string
table string
options.Options
}
// List all the known records
func (s *sqlStore) List() ([]*store.Record, error) {
q, err := s.db.Prepare(fmt.Sprintf("SELECT key, value, expiry FROM micro.%s;", s.table))
q, err := s.db.Prepare(fmt.Sprintf("SELECT key, value, expiry FROM %s.%s;", s.database, s.table))
if err != nil {
return nil, err
}
@ -73,7 +77,7 @@ func (s *sqlStore) List() ([]*store.Record, error) {
// Read all records with keys
func (s *sqlStore) Read(keys ...string) ([]*store.Record, error) {
q, err := s.db.Prepare(fmt.Sprintf("SELECT key, value, expiry FROM micro.%s WHERE key = $1;", s.table))
q, err := s.db.Prepare(fmt.Sprintf("SELECT key, value, expiry FROM %s.%s WHERE key = $1;", s.database, s.table))
if err != nil {
return nil, err
}
@ -105,11 +109,11 @@ func (s *sqlStore) Read(keys ...string) ([]*store.Record, error) {
// Write records
func (s *sqlStore) Write(rec ...*store.Record) error {
q, err := s.db.Prepare(fmt.Sprintf(`INSERT INTO micro.%s(key, value, expiry)
q, err := s.db.Prepare(fmt.Sprintf(`INSERT INTO %s.%s(key, value, expiry)
VALUES ($1, $2::bytea, $3)
ON CONFLICT (key)
DO UPDATE
SET value = EXCLUDED.value, expiry = EXCLUDED.expiry;`, s.table))
SET value = EXCLUDED.value, expiry = EXCLUDED.expiry;`, s.database, s.table))
if err != nil {
return err
}
@ -130,7 +134,7 @@ func (s *sqlStore) Write(rec ...*store.Record) error {
// Delete records with keys
func (s *sqlStore) Delete(keys ...string) error {
q, err := s.db.Prepare(fmt.Sprintf("DELETE FROM micro.%s WHERE key = $1;", s.table))
q, err := s.db.Prepare(fmt.Sprintf("DELETE FROM %s.%s WHERE key = $1;", s.database, s.table))
if err != nil {
return err
}
@ -151,10 +155,21 @@ func (s *sqlStore) initDB(options options.Options) error {
// Get the store.namespace option, or use sql.DefaultNamespace
namespaceOpt, found := options.Values().Get("store.namespace")
if !found {
s.table = DefaultNamespace
s.database = DefaultNamespace
} else {
if namespace, ok := namespaceOpt.(string); ok {
s.table = namespace
s.database = namespace
} else {
return errors.New("store.namespace option must be a string")
}
}
// Get the store.namespace option, or use sql.DefaultNamespace
prefixOpt, found := options.Values().Get("store.prefix")
if !found {
s.table = DefaultPrefix
} else {
if prefix, ok := prefixOpt.(string); ok {
s.table = prefix
} else {
return errors.New("store.namespace option must be a string")
}
@ -171,13 +186,13 @@ func (s *sqlStore) initDB(options options.Options) error {
}
// Create a table for the Store namespace
tableq, err := s.db.Prepare(fmt.Sprintf(`CREATE TABLE IF NOT EXISTS micro.%s
tableq, err := s.db.Prepare(fmt.Sprintf(`CREATE TABLE IF NOT EXISTS %s.%s
(
key text COLLATE "default" NOT NULL,
value bytea,
expiry timestamp with time zone,
CONSTRAINT %s_pkey PRIMARY KEY (key)
);`, s.table, s.table))
);`, s.database, s.table, s.table))
if err != nil {
return errors.Wrap(err, "SQL statement preparation failed")
}

45
store/service/service.go
View File

@ -8,6 +8,7 @@ import (
"github.com/micro/go-micro/client"
"github.com/micro/go-micro/config/options"
"github.com/micro/go-micro/metadata"
"github.com/micro/go-micro/store"
pb "github.com/micro/go-micro/store/service/proto"
)
@ -15,16 +16,38 @@ import (
type serviceStore struct {
options.Options
// Namespace to use
Namespace string
// Addresses of the nodes
Nodes []string
// Prefix to use
Prefix string
// store service client
Client pb.StoreService
}
func (s *serviceStore) Context() context.Context {
ctx := context.Background()
md := make(metadata.Metadata)
if len(s.Namespace) > 0 {
md["Micro-Namespace"] = s.Namespace
}
if len(s.Prefix) > 0 {
md["Micro-Prefix"] = s.Prefix
}
return metadata.NewContext(ctx, md)
}
// Sync all the known records
func (s *serviceStore) List() ([]*store.Record, error) {
stream, err := s.Client.List(context.Background(), &pb.ListRequest{}, client.WithAddress(s.Nodes...))
stream, err := s.Client.List(s.Context(), &pb.ListRequest{}, client.WithAddress(s.Nodes...))
if err != nil {
return nil, err
}
@ -54,7 +77,7 @@ func (s *serviceStore) List() ([]*store.Record, error) {
// Read a record with key
func (s *serviceStore) Read(keys ...string) ([]*store.Record, error) {
rsp, err := s.Client.Read(context.Background(), &pb.ReadRequest{
rsp, err := s.Client.Read(s.Context(), &pb.ReadRequest{
Keys: keys,
}, client.WithAddress(s.Nodes...))
if err != nil {
@ -84,7 +107,7 @@ func (s *serviceStore) Write(recs ...*store.Record) error {
})
}
_, err := s.Client.Write(context.Background(), &pb.WriteRequest{
_, err := s.Client.Write(s.Context(), &pb.WriteRequest{
Records: records,
}, client.WithAddress(s.Nodes...))
@ -93,7 +116,7 @@ func (s *serviceStore) Write(recs ...*store.Record) error {
// Delete a record with key
func (s *serviceStore) Delete(keys ...string) error {
_, err := s.Client.Delete(context.Background(), &pb.DeleteRequest{
_, err := s.Client.Delete(s.Context(), &pb.DeleteRequest{
Keys: keys,
}, client.WithAddress(s.Nodes...))
return err
@ -104,14 +127,28 @@ func NewStore(opts ...options.Option) store.Store {
options := options.NewOptions(opts...)
var nodes []string
var namespace string
var prefix string
n, ok := options.Values().Get("store.nodes")
if ok {
nodes = n.([]string)
}
ns, ok := options.Values().Get("store.namespace")
if ok {
namespace = ns.(string)
}
prx, ok := options.Values().Get("store.prefix")
if ok {
prefix = prx.(string)
}
service := &serviceStore{
Options: options,
Namespace: namespace,
Prefix: prefix,
Nodes: nodes,
Client: pb.NewStoreService("go.micro.store", client.DefaultClient),
}