Add Validate() to serverConfig to call it at server startup and in Admin SetConfig handler to minimize errors scenario after server restart.
173 lines
4.2 KiB
Go
173 lines
4.2 KiB
Go
/*
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* Minio Cloud Storage, (C) 2018 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package target
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import (
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"encoding/json"
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"errors"
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"net/url"
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"github.com/minio/minio/pkg/event"
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xnet "github.com/minio/minio/pkg/net"
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"github.com/nats-io/go-nats-streaming"
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"github.com/nats-io/nats"
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)
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// NATSArgs - NATS target arguments.
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type NATSArgs struct {
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Enable bool `json:"enable"`
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Address xnet.Host `json:"address"`
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Subject string `json:"subject"`
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Username string `json:"username"`
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Password string `json:"password"`
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Token string `json:"token"`
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Secure bool `json:"secure"`
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PingInterval int64 `json:"pingInterval"`
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Streaming struct {
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Enable bool `json:"enable"`
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ClusterID string `json:"clusterID"`
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ClientID string `json:"clientID"`
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Async bool `json:"async"`
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MaxPubAcksInflight int `json:"maxPubAcksInflight"`
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} `json:"streaming"`
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}
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// Validate NATSArgs fields
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func (n NATSArgs) Validate() error {
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if !n.Enable {
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return nil
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}
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if n.Address.IsEmpty() {
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return errors.New("empty address")
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}
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if n.Subject == "" {
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return errors.New("empty subject")
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}
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if n.Streaming.Enable {
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if n.Streaming.ClusterID == "" {
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return errors.New("empty cluster id")
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}
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if n.Streaming.ClientID == "" {
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return errors.New("empty client id")
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}
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}
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return nil
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}
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// NATSTarget - NATS target.
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type NATSTarget struct {
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id event.TargetID
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args NATSArgs
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natsConn *nats.Conn
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stanConn stan.Conn
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}
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// ID - returns target ID.
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func (target *NATSTarget) ID() event.TargetID {
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return target.id
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}
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// Send - sends event to NATS.
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func (target *NATSTarget) Send(eventData event.Event) (err error) {
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objectName, err := url.QueryUnescape(eventData.S3.Object.Key)
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if err != nil {
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return err
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}
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key := eventData.S3.Bucket.Name + "/" + objectName
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data, err := json.Marshal(event.Log{eventData.EventName, key, []event.Event{eventData}})
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if err != nil {
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return err
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}
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if target.stanConn != nil {
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if target.args.Streaming.Async {
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_, err = target.stanConn.PublishAsync(target.args.Subject, data, nil)
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} else {
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err = target.stanConn.Publish(target.args.Subject, data)
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}
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} else {
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err = target.natsConn.Publish(target.args.Subject, data)
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}
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return err
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}
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// Close - closes underneath connections to NATS server.
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func (target *NATSTarget) Close() (err error) {
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if target.stanConn != nil {
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err = target.stanConn.Close()
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}
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if target.natsConn != nil {
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target.natsConn.Close()
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}
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return err
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}
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// NewNATSTarget - creates new NATS target.
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func NewNATSTarget(id string, args NATSArgs) (*NATSTarget, error) {
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var natsConn *nats.Conn
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var stanConn stan.Conn
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var err error
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if args.Streaming.Enable {
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scheme := "nats"
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if args.Secure {
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scheme = "tls"
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}
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addressURL := scheme + "://" + args.Username + ":" + args.Password + "@" + args.Address.String()
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clientID := args.Streaming.ClientID
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if clientID == "" {
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clientID, err = getNewUUID()
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if err != nil {
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return nil, err
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}
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}
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connOpts := []stan.Option{stan.NatsURL(addressURL)}
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if args.Streaming.MaxPubAcksInflight > 0 {
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connOpts = append(connOpts, stan.MaxPubAcksInflight(args.Streaming.MaxPubAcksInflight))
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}
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stanConn, err = stan.Connect(args.Streaming.ClusterID, clientID, connOpts...)
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} else {
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options := nats.DefaultOptions
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options.Url = "nats://" + args.Address.String()
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options.User = args.Username
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options.Password = args.Password
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options.Token = args.Token
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options.Secure = args.Secure
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natsConn, err = options.Connect()
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}
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if err != nil {
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return nil, err
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}
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return &NATSTarget{
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id: event.TargetID{id, "nats"},
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args: args,
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stanConn: stanConn,
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natsConn: natsConn,
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}, nil
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}
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