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client.go
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client.go
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/*
* Copyright (c) 2017, MegaEase
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http:https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package consulserviceregistry
import (
"fmt"
"github.com/hashicorp/consul/api"
)
type (
// consulClient is the common client interface for consul.
consulClient interface {
ServiceRegister(registration *api.AgentServiceRegistration) error
ServiceDeregister(instanceID string) error
ListServiceInstances(serviceName string) ([]*api.CatalogService, error)
ListAllServiceInstances() ([]*api.CatalogService, error)
}
consulAPIClient struct {
client *api.Client
}
)
func newConsulAPIClient(client *api.Client) *consulAPIClient {
return &consulAPIClient{
client: client,
}
}
func (c *consulAPIClient) ServiceRegister(registration *api.AgentServiceRegistration) error {
return c.client.Agent().ServiceRegister(registration)
}
func (c *consulAPIClient) ServiceDeregister(instanceID string) error {
return c.client.Agent().ServiceDeregister(instanceID)
}
func (c *consulAPIClient) ListServiceInstances(serviceName string) ([]*api.CatalogService, error) {
resp, _, err := c.client.Catalog().Service(serviceName, "", &api.QueryOptions{})
if err != nil {
return nil, err
}
return resp, nil
}
func (c *consulAPIClient) ListAllServiceInstances() ([]*api.CatalogService, error) {
resp, _, err := c.client.Catalog().Services(&api.QueryOptions{})
if err != nil {
return nil, fmt.Errorf("pull catalog services failed: %v", err)
}
catalogServices := []*api.CatalogService{}
for serviceName := range resp {
services, _, err := c.client.Catalog().Service(serviceName, "", &api.QueryOptions{})
if err != nil {
return nil, fmt.Errorf("pull catalog service %s failed: %v", serviceName, err)
}
catalogServices = append(catalogServices, services...)
}
return catalogServices, nil
}