162 lines
3.8 KiB
Go
162 lines
3.8 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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"net"
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"net/url"
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"sync"
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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/streadway/amqp"
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)
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// AMQPArgs - AMQP target arguments.
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type AMQPArgs struct {
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Enable bool `json:"enable"`
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URL xnet.URL `json:"url"`
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Exchange string `json:"exchange"`
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RoutingKey string `json:"routingKey"`
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ExchangeType string `json:"exchangeType"`
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DeliveryMode uint8 `json:"deliveryMode"`
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Mandatory bool `json:"mandatory"`
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Immediate bool `json:"immediate"`
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Durable bool `json:"durable"`
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Internal bool `json:"internal"`
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NoWait bool `json:"noWait"`
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AutoDeleted bool `json:"autoDeleted"`
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}
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// Validate AMQP arguments
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func (a *AMQPArgs) Validate() error {
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if !a.Enable {
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return nil
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}
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if _, err := amqp.ParseURI(a.URL.String()); err != nil {
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return err
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}
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return nil
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}
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// AMQPTarget - AMQP target
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type AMQPTarget struct {
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id event.TargetID
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args AMQPArgs
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conn *amqp.Connection
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connMutex sync.Mutex
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}
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// ID - returns TargetID.
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func (target *AMQPTarget) ID() event.TargetID {
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return target.id
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}
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func (target *AMQPTarget) channel() (*amqp.Channel, error) {
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isAMQPClosedErr := func(err error) bool {
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if err == amqp.ErrClosed {
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return true
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}
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if nerr, ok := err.(*net.OpError); ok {
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return (nerr.Err.Error() == "use of closed network connection")
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}
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return false
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}
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target.connMutex.Lock()
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defer target.connMutex.Unlock()
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ch, err := target.conn.Channel()
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if err == nil {
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return ch, nil
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}
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if !isAMQPClosedErr(err) {
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return nil, err
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}
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var conn *amqp.Connection
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if conn, err = amqp.Dial(target.args.URL.String()); err != nil {
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return nil, err
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}
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if ch, err = conn.Channel(); err != nil {
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return nil, err
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}
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target.conn = conn
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return ch, nil
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}
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// Send - sends event to AMQP.
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func (target *AMQPTarget) Send(eventData event.Event) error {
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ch, err := target.channel()
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if err != nil {
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return err
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}
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defer func() {
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// FIXME: log returned error. ignore time being.
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_ = ch.Close()
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}()
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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{EventName: eventData.EventName, Key: key, Records: []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 err = ch.ExchangeDeclare(target.args.Exchange, target.args.ExchangeType, target.args.Durable,
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target.args.AutoDeleted, target.args.Internal, target.args.NoWait, nil); err != nil {
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return err
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}
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return ch.Publish(target.args.Exchange, target.args.RoutingKey, target.args.Mandatory,
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target.args.Immediate, amqp.Publishing{
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ContentType: "application/json",
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DeliveryMode: target.args.DeliveryMode,
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Body: data,
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})
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}
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// Close - does nothing and available for interface compatibility.
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func (target *AMQPTarget) Close() error {
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return nil
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}
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// NewAMQPTarget - creates new AMQP target.
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func NewAMQPTarget(id string, args AMQPArgs) (*AMQPTarget, error) {
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conn, err := amqp.Dial(args.URL.String())
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if err != nil {
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return nil, err
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}
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return &AMQPTarget{
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id: event.TargetID{ID: id, Name: "amqp"},
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args: args,
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conn: conn,
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}, nil
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}
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