You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
114 lines
3.5 KiB
114 lines
3.5 KiB
package zookeeper
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"io"
|
|
"strings"
|
|
|
|
"github.com/OpenIMSDK/Open-IM-Server/pkg/common/log"
|
|
"github.com/pkg/errors"
|
|
|
|
"github.com/go-zookeeper/zk"
|
|
"google.golang.org/grpc"
|
|
"google.golang.org/grpc/resolver"
|
|
)
|
|
|
|
var ErrConnIsNil = errors.New("conn is nil")
|
|
var ErrConnIsNilButLocalNotNil = errors.New("conn is nil, but local is not nil")
|
|
|
|
func (s *ZkClient) watch() {
|
|
for {
|
|
event := <-s.eventChan
|
|
switch event.Type {
|
|
case zk.EventSession:
|
|
s.logger.Printf("zk session event: %+v", event)
|
|
case zk.EventNodeChildrenChanged:
|
|
s.logger.Printf("zk event: %s", event.Path)
|
|
l := strings.Split(event.Path, "/")
|
|
if len(l) > 1 {
|
|
serviceName := l[len(l)-1]
|
|
s.lock.Lock()
|
|
s.flushResolverAndDeleteLocal(serviceName)
|
|
s.lock.Unlock()
|
|
}
|
|
s.logger.Printf("zk event handle success: %s", event.Path)
|
|
case zk.EventNodeDataChanged:
|
|
case zk.EventNodeCreated:
|
|
case zk.EventNodeDeleted:
|
|
case zk.EventNotWatching:
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
func (s *ZkClient) GetConnsRemote(serviceName string) (conns []resolver.Address, err error) {
|
|
path := s.getPath(serviceName)
|
|
_, _, _, err = s.conn.ChildrenW(path)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "children watch error")
|
|
}
|
|
childNodes, _, err := s.conn.Children(path)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, "get children error")
|
|
} else {
|
|
for _, child := range childNodes {
|
|
fullPath := path + "/" + child
|
|
data, _, err := s.conn.Get(fullPath)
|
|
if err != nil {
|
|
if err == zk.ErrNoNode {
|
|
return nil, errors.Wrap(err, "this is zk ErrNoNode")
|
|
}
|
|
return nil, errors.Wrap(err, "get children error")
|
|
}
|
|
log.ZDebug(context.Background(), "get conns from remote", "conn", string(data))
|
|
conns = append(conns, resolver.Address{Addr: string(data), ServerName: serviceName})
|
|
}
|
|
}
|
|
return conns, nil
|
|
}
|
|
|
|
func (s *ZkClient) GetConns(ctx context.Context, serviceName string, opts ...grpc.DialOption) ([]grpc.ClientConnInterface, error) {
|
|
s.logger.Printf("get conns from client, serviceName: %s", serviceName)
|
|
s.lock.Lock()
|
|
opts = append(s.options, opts...)
|
|
conns := s.localConns[serviceName]
|
|
if len(conns) == 0 {
|
|
var err error
|
|
s.logger.Printf("get conns from zk remote, serviceName: %s", serviceName)
|
|
conns, err = s.GetConnsRemote(serviceName)
|
|
if err != nil {
|
|
s.lock.Unlock()
|
|
return nil, err
|
|
}
|
|
if len(conns) == 0 {
|
|
return nil, fmt.Errorf("no conn for service %s, grpc server may not exist, local conn is %v, please check zookeeper server %v, path: %s", serviceName, s.localConns, s.zkServers, s.zkRoot)
|
|
}
|
|
s.localConns[serviceName] = conns
|
|
}
|
|
s.lock.Unlock()
|
|
var ret []grpc.ClientConnInterface
|
|
s.logger.Printf("get conns from zk success, serviceName: %s", serviceName)
|
|
for _, conn := range conns {
|
|
cc, err := grpc.DialContext(ctx, conn.Addr, append(s.options, opts...)...)
|
|
if err != nil {
|
|
return nil, errors.Wrap(err, fmt.Sprintf("conns dialContext error, conn: %s", conn.Addr))
|
|
}
|
|
ret = append(ret, cc)
|
|
}
|
|
s.logger.Printf("dial ctx success, serviceName: %s", serviceName)
|
|
return ret, nil
|
|
}
|
|
|
|
func (s *ZkClient) GetConn(ctx context.Context, serviceName string, opts ...grpc.DialOption) (grpc.ClientConnInterface, error) {
|
|
newOpts := append(s.options, grpc.WithDefaultServiceConfig(fmt.Sprintf(`{"LoadBalancingPolicy": "%s"}`, s.balancerName)))
|
|
s.logger.Printf("get conn from client, serviceName: %s", serviceName)
|
|
return grpc.DialContext(ctx, fmt.Sprintf("%s:///%s", s.scheme, serviceName), append(newOpts, opts...)...)
|
|
}
|
|
|
|
func (s *ZkClient) CloseConn(conn grpc.ClientConnInterface) {
|
|
if closer, ok := conn.(io.Closer); ok {
|
|
closer.Close()
|
|
}
|
|
}
|