/
cluster.go
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/
cluster.go
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// Copyright 2016 IBM Corporation
//
// 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://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 cluster defines and implements types related to service discovery clustering.
package cluster
import "github.com/amalgam8/amalgam8/registry/utils/health"
// Module name to be used in logging
const module = "CLUSTER"
// Cluster represents a collection of service discovery servers ("members").
type Cluster interface {
Registrator(m Member) Registrator
Membership() Membership
}
// New creates and initializes a new cluster with the given configuration.
// Nil argument results with default values for the configuration.
func New(conf *Config) (Cluster, error) {
conf = defaultize(conf)
b, err := newBackend(conf)
if err != nil {
return nil, err
}
m := newMembership(b, conf.TTL, conf.ScanInterval)
c := &cluster{backend: b, membership: m, conf: conf}
m.StartMonitoring()
hc := newHealthChecker(m, conf.Size)
health.Register(module, hc)
return c, nil
}
// cluster is an implementation of the Cluster interface
type cluster struct {
backend backend
membership *membership
conf *Config
}
func (c *cluster) Registrator(m Member) Registrator {
return newRegistrator(c.backend, m, c.membership, c.conf.RenewInterval)
}
func (c *cluster) Membership() Membership {
return c.membership
}