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cluster_entry.go
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/
cluster_entry.go
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//
// Copyright (c) 2015 The heketi 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 glusterfs
import (
"bytes"
"encoding/gob"
"fmt"
"sort"
"github.com/boltdb/bolt"
"github.com/heketi/heketi/pkg/glusterfs/api"
"github.com/heketi/heketi/pkg/utils"
"github.com/lpabon/godbc"
)
type ClusterEntry struct {
Info api.ClusterInfoResponse
}
func ClusterList(tx *bolt.Tx) ([]string, error) {
list := EntryKeys(tx, BOLTDB_BUCKET_CLUSTER)
if list == nil {
return nil, ErrAccessList
}
return list, nil
}
func NewClusterEntry() *ClusterEntry {
entry := &ClusterEntry{}
entry.Info.Nodes = make(sort.StringSlice, 0)
entry.Info.Volumes = make(sort.StringSlice, 0)
return entry
}
func NewClusterEntryFromRequest() *ClusterEntry {
entry := NewClusterEntry()
entry.Info.Id = utils.GenUUID()
return entry
}
func NewClusterEntryFromId(tx *bolt.Tx, id string) (*ClusterEntry, error) {
entry := NewClusterEntry()
err := EntryLoad(tx, entry, id)
if err != nil {
return nil, err
}
return entry, nil
}
func (c *ClusterEntry) BucketName() string {
return BOLTDB_BUCKET_CLUSTER
}
func (c *ClusterEntry) Save(tx *bolt.Tx) error {
godbc.Require(tx != nil)
godbc.Require(len(c.Info.Id) > 0)
return EntrySave(tx, c, c.Info.Id)
}
func (c *ClusterEntry) ConflictString() string {
return fmt.Sprintf("Unable to delete cluster [%v] because it contains volumes and/or nodes", c.Info.Id)
}
func (c *ClusterEntry) Delete(tx *bolt.Tx) error {
godbc.Require(tx != nil)
// Check if the cluster still has nodes or volumes
if len(c.Info.Nodes) > 0 || len(c.Info.Volumes) > 0 {
logger.Warning(c.ConflictString())
return ErrConflict
}
return EntryDelete(tx, c, c.Info.Id)
}
func (c *ClusterEntry) NewClusterInfoResponse(tx *bolt.Tx) (*api.ClusterInfoResponse, error) {
info := &api.ClusterInfoResponse{}
*info = c.Info
return info, nil
}
func (c *ClusterEntry) Marshal() ([]byte, error) {
var buffer bytes.Buffer
enc := gob.NewEncoder(&buffer)
err := enc.Encode(*c)
return buffer.Bytes(), err
}
func (c *ClusterEntry) Unmarshal(buffer []byte) error {
dec := gob.NewDecoder(bytes.NewReader(buffer))
err := dec.Decode(c)
if err != nil {
return err
}
// Make sure to setup arrays if nil
if c.Info.Nodes == nil {
c.Info.Nodes = make(sort.StringSlice, 0)
}
if c.Info.Volumes == nil {
c.Info.Volumes = make(sort.StringSlice, 0)
}
return nil
}
func (c *ClusterEntry) NodeEntryFromClusterIndex(tx *bolt.Tx, index int) (*NodeEntry, error) {
node, err := NewNodeEntryFromId(tx, c.Info.Nodes[index])
if err != nil {
return nil, err
}
return node, nil
}
func (c *ClusterEntry) NodeAdd(id string) {
c.Info.Nodes = append(c.Info.Nodes, id)
c.Info.Nodes.Sort()
}
func (c *ClusterEntry) VolumeAdd(id string) {
c.Info.Volumes = append(c.Info.Volumes, id)
c.Info.Volumes.Sort()
}
func (c *ClusterEntry) VolumeDelete(id string) {
c.Info.Volumes = utils.SortedStringsDelete(c.Info.Volumes, id)
}
func (c *ClusterEntry) NodeDelete(id string) {
c.Info.Nodes = utils.SortedStringsDelete(c.Info.Nodes, id)
}