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builder.go
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/
builder.go
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package registry
import (
"context"
"fmt"
"strconv"
"strings"
"time"
"github.com/pubgo/funk/assert"
"github.com/pubgo/funk/async"
"github.com/pubgo/funk/errors"
"github.com/pubgo/funk/log"
"github.com/pubgo/funk/running"
"github.com/pubgo/funk/version"
"github.com/pubgo/lava/core/lifecycle"
"github.com/pubgo/lava/core/service"
"github.com/pubgo/lava/internal/logutil"
"github.com/pubgo/lava/pkg/netutil"
)
func New(c *Config, lifecycle lifecycle.Lifecycle, regs map[string]Registry) {
cfg := DefaultCfg()
// 配置解析
cfg.Check()
reg := regs[cfg.Driver]
assert.Fn(reg == nil, func() error {
return &errors.Err{
Msg: "registry driver is null",
Tags: errors.Tags{
errors.T("driver", cfg.Driver),
errors.T("regs", regs),
},
}
})
// 服务注册
lifecycle.AfterStart(func() {
SetDefault(reg)
register(reg)
cancel := async.GoCtx(func(ctx context.Context) error {
interval := DefaultRegisterInterval
if cfg.RegisterInterval > time.Duration(0) {
interval = cfg.RegisterInterval
}
tick := time.NewTicker(interval)
defer tick.Stop()
for {
select {
case <-tick.C:
register(reg)
case <-ctx.Done():
log.Info().Msg("service register cancelled")
return nil
}
}
})
// 服务撤销
lifecycle.BeforeStop(func() {
cancel()
deregister(reg)
})
})
}
func register(reg Registry) {
// parse address for host, port
var advt, host string
port := running.GrpcPort
parts := strings.Split(advt, ":")
if len(parts) > 1 {
host = strings.Join(parts[:len(parts)-1], ":")
port, _ = strconv.Atoi(parts[len(parts)-1])
} else {
host = parts[0]
}
if host == "" {
host = netutil.GetLocalIP()
}
// register service
node := &service.Node{
Port: port,
Version: version.Version(),
Address: fmt.Sprintf("%s:%d", host, port),
Id: running.Project + "-" + running.Hostname + "-" + running.InstanceID,
Metadata: map[string]string{"registry": reg.String()},
}
s := &service.Service{
Name: running.Project,
Nodes: []*service.Node{node},
}
logutil.OkOrFailed(
log.GetLogger("service-registry"),
"register service node",
func() error {
err := reg.Register(context.Background(), s)
return errors.WrapTag(err,
errors.T("instance_id", node.Id),
errors.T("service", running.Project),
errors.T("registry", Default().String()),
)
},
)
}
func deregister(reg Registry) {
var advt, host string
port := running.GrpcPort
parts := strings.Split(advt, ":")
if len(parts) > 1 {
host = strings.Join(parts[:len(parts)-1], ":")
port, _ = strconv.Atoi(parts[len(parts)-1])
} else {
host = parts[0]
}
// register service
node := &service.Node{
Port: port,
Address: fmt.Sprintf("%s:%d", host, port),
Id: running.Project + "-" + running.Hostname + "-" + running.InstanceID,
Metadata: make(map[string]string),
}
s := &service.Service{
Name: running.Project,
Nodes: []*service.Node{node},
}
logutil.OkOrFailed(
log.GetLogger("service-registry"),
"deregister service node",
func() error {
err := reg.Deregister(context.Background(), s)
return errors.WrapTag(err,
errors.T("id", node.Id),
errors.T("name", running.Project),
)
},
)
}