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client_factory.go
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client_factory.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package internal
import (
"os"
"github.com/uber/cherami-client-go/client/cherami"
)
// ClientFactory provides all the interfaces that are used to get cherami entities
type ClientFactory interface {
// GetPublisher returns a cherami publisher
GetPublisher(client cherami.Client, destination string) (cherami.Publisher, error)
// GetConsumer returns a cherami consumer
GetConsumer(client cherami.Client, config ConsumerConfig) (cherami.Consumer, chan cherami.Delivery, error)
}
// ConsumerConfig is the configuration needed to create a consumer object
type ConsumerConfig struct {
Destination string
ConsumerGroup string
PrefetchCount int
}
type clientFactoryImp struct {
}
// NewClientFactory creates a client factory object
func NewClientFactory() ClientFactory {
return &clientFactoryImp{}
}
func (c *clientFactoryImp) GetPublisher(client cherami.Client, destination string) (cherami.Publisher, error) {
publisher := client.CreatePublisher(&cherami.CreatePublisherRequest{
Path: destination,
})
err := publisher.Open()
return publisher, err
}
func (c *clientFactoryImp) GetConsumer(client cherami.Client, config ConsumerConfig) (cherami.Consumer, chan cherami.Delivery, error) {
hostName, _ := os.Hostname()
consumerName := "yarpc_cherami_" + hostName
consumer := client.CreateConsumer(&cherami.CreateConsumerRequest{
Path: config.Destination,
ConsumerGroupName: config.ConsumerGroup,
ConsumerName: consumerName,
PrefetchCount: config.PrefetchCount,
})
ch := make(chan cherami.Delivery, config.PrefetchCount)
if _, err := consumer.Open(ch); err != nil {
return nil, nil, err
}
return consumer, ch, nil
}