| package topology |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| import ( |
| "database/sql" |
| "errors" |
| |
| "github.com/apache/trafficcontrol/lib/go-log" |
| "github.com/apache/trafficcontrol/lib/go-tc" |
| "github.com/lib/pq" |
| ) |
| |
| // MakeTopologies makes the topologies data for the crconfig and tmconfig snapshots. |
| func MakeTopologies(tx *sql.Tx) (map[string]tc.CRConfigTopology, error) { |
| query := ` |
| SELECT |
| t.name, |
| (SELECT ARRAY_AGG(tc.cachegroup ORDER BY tc.cachegroup) |
| FROM topology_cachegroup tc |
| JOIN cachegroup c ON c.name = tc.cachegroup |
| JOIN type ON type.id = c.type |
| WHERE t.name = tc.topology |
| AND type.name = $1 |
| ) AS nodes |
| FROM topology t |
| ORDER BY t.name |
| ` |
| var rows *sql.Rows |
| var err error |
| if rows, err = tx.Query(query, tc.CacheGroupEdgeTypeName); err != nil { |
| return nil, errors.New("querying topologies: " + err.Error()) |
| } |
| defer log.Close(rows, "unable to close DB connection") |
| |
| topologies := map[string]tc.CRConfigTopology{} |
| for rows.Next() { |
| topology := tc.CRConfigTopology{} |
| var name string |
| if err = rows.Scan( |
| &name, |
| pq.Array(&topology.Nodes), |
| ); err != nil { |
| return nil, errors.New("scanning topology: " + err.Error()) |
| } |
| topologies[name] = topology |
| } |
| return topologies, nil |
| } |