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package operation
import (
"encoding/json"
"fmt"
"net/url"
"strconv"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/util"
)
type VolumeAssignRequest struct {
Count uint64
Replication string
Collection string
Ttl string
DataCenter string
Rack string
DataNode string
}
type AssignResult struct {
Fid string `json:"fid,omitempty"`
Url string `json:"url,omitempty"`
PublicUrl string `json:"publicUrl,omitempty"`
Count uint64 `json:"count,omitempty"`
Error string `json:"error,omitempty"`
}
func Assign(server string, primaryRequest *VolumeAssignRequest, alternativeRequests ...*VolumeAssignRequest) (*AssignResult, error) {
var requests []*VolumeAssignRequest
requests = append(requests, primaryRequest)
requests = append(requests, alternativeRequests...)
var lastError error
for i, request := range requests {
if request == nil {
continue
}
values := make(url.Values)
values.Add("count", strconv.FormatUint(request.Count, 10))
if request.Replication != "" {
values.Add("replication", request.Replication)
}
if request.Collection != "" {
values.Add("collection", request.Collection)
}
if request.Ttl != "" {
values.Add("ttl", request.Ttl)
}
if request.DataCenter != "" {
values.Add("dataCenter", request.DataCenter)
}
if request.Rack != "" {
values.Add("rack", request.Rack)
}
if request.DataNode != "" {
values.Add("dataNode", request.DataNode)
}
postUrl := fmt.Sprintf("http://%s/dir/assign", server)
jsonBlob, err := util.Post(postUrl, values)
glog.V(2).Infof("assign %d result from %s %+v : %s", i, postUrl, values, string(jsonBlob))
if err != nil {
return nil, err
}
var ret AssignResult
err = json.Unmarshal(jsonBlob, &ret)
if err != nil {
return nil, fmt.Errorf("/dir/assign result JSON unmarshal error:%v, json:%s", err, string(jsonBlob))
}
if ret.Count <= 0 {
lastError = fmt.Errorf("assign failure %d: %v", i+1, ret.Error)
continue
}
return &ret, nil
}
return nil, lastError
}
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