136 lines
4.1 KiB
Go
136 lines
4.1 KiB
Go
/*
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* Copyright 2020 The Dragonfly Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package client
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import (
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"context"
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"fmt"
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"sync"
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"time"
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"d7y.io/dragonfly/v2/internal/idgen"
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"d7y.io/dragonfly/v2/internal/rpc"
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"d7y.io/dragonfly/v2/internal/rpc/base"
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"d7y.io/dragonfly/v2/internal/rpc/dfdaemon"
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"d7y.io/dragonfly/v2/pkg/basic/dfnet"
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"github.com/golang/protobuf/ptypes/empty"
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"github.com/google/uuid"
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"github.com/pkg/errors"
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"google.golang.org/grpc"
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)
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var _ DaemonClient = (*daemonClient)(nil)
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func GetClientByAddr(addrs []dfnet.NetAddr, opts ...grpc.DialOption) (DaemonClient, error) {
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if len(addrs) == 0 {
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return nil, errors.New("address list of daemon is empty")
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}
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dc := &daemonClient{
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rpc.NewConnection(context.Background(), "daemon-static", addrs, []rpc.ConnOption{
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rpc.WithConnExpireTime(60 * time.Second),
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rpc.WithDialOption(opts),
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}),
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}
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return dc, nil
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}
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var once sync.Once
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var elasticDaemonClient *daemonClient
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func GetElasticClientByAdders(addrs []dfnet.NetAddr, opts ...grpc.DialOption) (DaemonClient, error) {
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once.Do(func() {
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elasticDaemonClient = &daemonClient{
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rpc.NewConnection(context.Background(), "daemon-elastic", make([]dfnet.NetAddr, 0), []rpc.ConnOption{
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rpc.WithConnExpireTime(30 * time.Second),
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rpc.WithDialOption(opts),
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}),
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}
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})
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err := elasticDaemonClient.Connection.AddServerNodes(addrs)
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if err != nil {
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return nil, err
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}
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return elasticDaemonClient, nil
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}
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// see dfdaemon.DaemonClient
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type DaemonClient interface {
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Download(ctx context.Context, req *dfdaemon.DownRequest, opts ...grpc.CallOption) (*DownResultStream, error)
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GetPieceTasks(ctx context.Context, addr dfnet.NetAddr, ptr *base.PieceTaskRequest, opts ...grpc.CallOption) (*base.PiecePacket, error)
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CheckHealth(ctx context.Context, target dfnet.NetAddr, opts ...grpc.CallOption) error
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Close() error
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}
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type daemonClient struct {
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*rpc.Connection
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}
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func (dc *daemonClient) getDaemonClient(key string, stick bool) (dfdaemon.DaemonClient, string, error) {
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clientConn, err := dc.Connection.GetClientConn(key, stick)
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if err != nil {
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return nil, "", err
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}
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return dfdaemon.NewDaemonClient(clientConn), clientConn.Target(), nil
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}
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func (dc *daemonClient) getDaemonClientWithTarget(target string) (dfdaemon.DaemonClient, error) {
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conn, err := dc.Connection.GetClientConnByTarget(target)
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if err != nil {
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return nil, err
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}
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return dfdaemon.NewDaemonClient(conn), nil
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}
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func (dc *daemonClient) Download(ctx context.Context, req *dfdaemon.DownRequest, opts ...grpc.CallOption) (*DownResultStream, error) {
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req.Uuid = uuid.New().String()
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// generate taskID
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taskID := idgen.TaskID(req.Url, req.UrlMeta.Filter, req.UrlMeta, req.UrlMeta.Tag)
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return newDownResultStream(ctx, dc, taskID, req, opts)
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}
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func (dc *daemonClient) GetPieceTasks(ctx context.Context, target dfnet.NetAddr, ptr *base.PieceTaskRequest, opts ...grpc.CallOption) (*base.PiecePacket,
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error) {
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res, err := rpc.ExecuteWithRetry(func() (interface{}, error) {
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client, err := dc.getDaemonClientWithTarget(target.GetEndpoint())
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if err != nil {
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return nil, err
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}
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return client.GetPieceTasks(ctx, ptr, opts...)
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}, 0.2, 2.0, 3, nil)
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if err == nil {
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return res.(*base.PiecePacket), nil
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}
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return nil, err
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}
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func (dc *daemonClient) CheckHealth(ctx context.Context, target dfnet.NetAddr, opts ...grpc.CallOption) (err error) {
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_, err = rpc.ExecuteWithRetry(func() (interface{}, error) {
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client, err := dc.getDaemonClientWithTarget(target.GetEndpoint())
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if err != nil {
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return nil, fmt.Errorf("failed to connect server %s: %v", target.GetEndpoint(), err)
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}
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return client.CheckHealth(ctx, new(empty.Empty), opts...)
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}, 0.2, 2.0, 3, nil)
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return
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}
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