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peerdist.go
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peerdist.go
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/**
* Copyright 2014 Paul Querna
*
* 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 storage
import (
log "github.com/Sirupsen/logrus"
"github.com/mitchellh/go-homedir"
"github.com/pquerna/distsync/common"
"github.com/pquerna/distsync/crypto"
"github.com/pquerna/distsync/peerdist"
"errors"
"io"
)
type PeerDownloader struct {
storage Storage
pd peerdist.DistDownloader
ec crypto.Cryptor
outputDir string
}
func NewPeerDownloader(conf *common.Conf) (PersistentDownloader, error) {
if conf.OutputDir == nil {
return nil, errors.New("Config Error: OutputDir must be set.")
}
outputDir, err := homedir.Expand(*conf.OutputDir)
if err != nil {
return nil, err
}
ec, err := crypto.NewFromConf(conf)
if err != nil {
return nil, err
}
// TODO: better separation? different interface for download?
st, err := NewFromConf(conf)
if err != nil {
return nil, err
}
s3d, err := peerdist.NewS3Discovery(conf)
if err != nil {
return nil, err
}
la := ":4166"
ga := ":4167"
if conf.PeerDist != nil {
if conf.PeerDist.ListenAddr != "" {
la = conf.PeerDist.ListenAddr
}
if conf.PeerDist.GossipAddr != "" {
ga = conf.PeerDist.GossipAddr
}
}
pd, err := peerdist.New(nil, la, ga, s3d)
if err != nil {
return nil, err
}
return &PeerDownloader{
pd: pd,
storage: st,
ec: ec,
outputDir: outputDir,
}, nil
}
func (pd *PeerDownloader) Start() error {
return nil
}
func (pd *PeerDownloader) Stop() error {
return nil
}
func (pd *PeerDownloader) Download(filename string, writer io.Writer) error {
log.Error("not downloading yet.")
return nil
}