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client.go
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client.go
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/*
* Copyright 2020 The Dragonfly Authors
*
* 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 client
import (
"context"
"sync"
"time"
logger "d7y.io/dragonfly/v2/internal/dflog"
"d7y.io/dragonfly/v2/pkg/basic/dfnet"
"d7y.io/dragonfly/v2/pkg/rpc"
"d7y.io/dragonfly/v2/pkg/rpc/base"
"d7y.io/dragonfly/v2/pkg/rpc/cdnsystem"
"github.com/pkg/errors"
"google.golang.org/grpc"
)
func GetClientByAddr(addrs []dfnet.NetAddr, opts ...grpc.DialOption) (CdnClient, error) {
if len(addrs) == 0 {
return nil, errors.New("address list of cdn is empty")
}
cc := &cdnClient{
rpc.NewConnection(context.Background(), "cdn", addrs, []rpc.ConnOption{
rpc.WithConnExpireTime(60 * time.Second),
rpc.WithDialOption(opts),
}),
}
return cc, nil
}
var once sync.Once
var elasticCdnClient *cdnClient
func GetElasticClientByAddrs(addrs []dfnet.NetAddr, opts ...grpc.DialOption) (CdnClient, error) {
once.Do(func() {
elasticCdnClient = &cdnClient{
rpc.NewConnection(context.Background(), "cdn-elastic", make([]dfnet.NetAddr, 0), []rpc.ConnOption{
rpc.WithConnExpireTime(30 * time.Second),
rpc.WithDialOption(opts),
}),
}
})
err := elasticCdnClient.Connection.AddServerNodes(addrs)
if err != nil {
return nil, err
}
return elasticCdnClient, nil
}
// CdnClient see cdnsystem.CdnClient
type CdnClient interface {
ObtainSeeds(ctx context.Context, sr *cdnsystem.SeedRequest, opts ...grpc.CallOption) (*PieceSeedStream, error)
GetPieceTasks(ctx context.Context, addr dfnet.NetAddr, req *base.PieceTaskRequest, opts ...grpc.CallOption) (*base.PiecePacket, error)
UpdateState(addrs []dfnet.NetAddr)
Close() error
}
type cdnClient struct {
*rpc.Connection
}
var _ CdnClient = (*cdnClient)(nil)
func (cc *cdnClient) getCdnClient(key string, stick bool) (cdnsystem.SeederClient, string, error) {
clientConn, err := cc.Connection.GetClientConn(key, stick)
if err != nil {
return nil, "", errors.Wrapf(err, "get ClientConn for hashKey %s", key)
}
return cdnsystem.NewSeederClient(clientConn), clientConn.Target(), nil
}
func (cc *cdnClient) getSeederClientWithTarget(target string) (cdnsystem.SeederClient, error) {
conn, err := cc.Connection.GetClientConnByTarget(target)
if err != nil {
return nil, err
}
return cdnsystem.NewSeederClient(conn), nil
}
func (cc *cdnClient) ObtainSeeds(ctx context.Context, sr *cdnsystem.SeedRequest, opts ...grpc.CallOption) (*PieceSeedStream, error) {
return newPieceSeedStream(ctx, cc, sr.TaskId, sr, opts)
}
func (cc *cdnClient) GetPieceTasks(ctx context.Context, addr dfnet.NetAddr, req *base.PieceTaskRequest, opts ...grpc.CallOption) (*base.PiecePacket, error) {
res, err := rpc.ExecuteWithRetry(func() (interface{}, error) {
client, err := cc.getSeederClientWithTarget(addr.GetEndpoint())
if err != nil {
return nil, err
}
return client.GetPieceTasks(ctx, req, opts...)
}, 0.2, 2.0, 3, nil)
if err != nil {
logger.WithTaskID(req.TaskId).Infof("GetPieceTasks: invoke cdn node %s GetPieceTasks failed: %v", addr.GetEndpoint(), err)
return nil, err
}
return res.(*base.PiecePacket), nil
}