gemma: pkg/octree/cache.go annotate

annotate pkg/octree/cache.go @ 1234:1a5564655f2a

refac: Sidebar reorganized In order to make context switches between administrative tasks which are map related and those which are system related, we now have a category "administration" and "systemadministration". The Riverbedmorphology does nothing than display the map, so it is renamed to that (map). In case the context of "systemadministration" is chosen, the "map" brings you just back to the map.

author	Thomas Junk <thomas.junk@intevation.de>
date	Tue, 20 Nov 2018 09:54:53 +0100
parents	19a04b150b6c
children	d753ce6cf588

rev	line source
1017 a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 727 diff changeset	1 // This is Free Software under GNU Affero General Public License v >= 3.0
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 727 diff changeset	2 // without warranty, see README.md and license for details.
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 727 diff changeset	3 //
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 727 diff changeset	4 // SPDX-License-Identifier: AGPL-3.0-or-later
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 727 diff changeset	5 // License-Filename: LICENSES/AGPL-3.0.txt
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 727 diff changeset	6 //
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 727 diff changeset	7 // Copyright (C) 2018 by via donau
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 727 diff changeset	8 // – Österreichische Wasserstraßen-Gesellschaft mbH
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 727 diff changeset	9 // Software engineering by Intevation GmbH
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 727 diff changeset	10 //
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 727 diff changeset	11 // Author(s):
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 727 diff changeset	12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
a244b18cb916 Added GNU Affero General Public License. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 727 diff changeset	13
724 6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	14 package octree
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	15
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	16 import (
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	17 "context"
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	18 "database/sql"
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	19 "sync"
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	20 "time"
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	21 )
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	22
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	23 type (
724 6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	24 cacheKey struct {
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	25 date time.Time
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	26 bottleneck string
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	27 }
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	28
724 6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	29 cacheEntry struct {
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	30 checksum string
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 725 diff changeset	31 tree *Tree
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	32 access time.Time
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	33 }
724 6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	34 OctreeCache struct {
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	35 sync.Mutex
724 6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	36 entries map[cacheKey]*cacheEntry
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	37 }
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	38 )
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	39
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	40 const (
724 6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	41 cleanupCacheSleep = 6 * time.Minute
6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	42 maxCacheAge = 5 * time.Minute
6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	43 maxCacheEntries = 4
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	44 )
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	45
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	46 const (
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	47 fetchOctreeSQL = `
1131 2e6b47cdb2ca Store octrees along with sounding results Tom Gottfried <tom@intevation.de> parents: 1017 diff changeset	48 SELECT octree_checksum, octree_index
2e6b47cdb2ca Store octrees along with sounding results Tom Gottfried <tom@intevation.de> parents: 1017 diff changeset	49 FROM waterway.sounding_results
2e6b47cdb2ca Store octrees along with sounding results Tom Gottfried <tom@intevation.de> parents: 1017 diff changeset	50 WHERE bottleneck_id = $1 AND date_info = $2::date
1135 19a04b150b6c Fixed SQL syntax errors introduced with 1153:2e6b47cdb2ca. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1131 diff changeset	51 AND octree_checksum IS NOT NULL AND octree_index IS NOT NULL
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	52 `
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	53 checkOctreeSQL = `
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	54 SELECT CASE
1131 2e6b47cdb2ca Store octrees along with sounding results Tom Gottfried <tom@intevation.de> parents: 1017 diff changeset	55 WHEN octree_checksum = $3 THEN NULL
2e6b47cdb2ca Store octrees along with sounding results Tom Gottfried <tom@intevation.de> parents: 1017 diff changeset	56 ELSE octree_index
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	57 END
1131 2e6b47cdb2ca Store octrees along with sounding results Tom Gottfried <tom@intevation.de> parents: 1017 diff changeset	58 FROM waterway.sounding_results
2e6b47cdb2ca Store octrees along with sounding results Tom Gottfried <tom@intevation.de> parents: 1017 diff changeset	59 WHERE bottleneck_id = $1 AND date_info = $2::date
1135 19a04b150b6c Fixed SQL syntax errors introduced with 1153:2e6b47cdb2ca. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 1131 diff changeset	60 AND octree_checksum IS NOT NULL AND octree_index IS NOT NULL
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	61 `
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	62 )
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	63
724 6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	64 var Cache = OctreeCache{
6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	65 entries: map[cacheKey]*cacheEntry{},
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	66 }
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	67
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	68 func init() {
724 6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	69 go Cache.background()
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	70 }
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	71
724 6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	72 func (oc *OctreeCache) background() {
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	73 for {
724 6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	74 time.Sleep(cleanupCacheSleep)
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	75 oc.cleanup()
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	76 }
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	77 }
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	78
724 6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	79 func (oc *OctreeCache) cleanup() {
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	80 oc.Lock()
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	81 defer oc.Unlock()
724 6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	82 good := time.Now().Add(-maxCacheAge)
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	83 for k, v := range oc.entries {
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	84 if v.access.Before(good) {
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	85 delete(oc.entries, k)
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	86 }
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	87 }
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	88 }
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	89
724 6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	90 func (oc *OctreeCache) Get(
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	91 bottleneck string, date time.Time,
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	92 conn *sql.Conn, ctx context.Context,
727 41c8dc61f38f Moved octree loading stuff to octree package. Sascha L. Teichmann <teichmann@intevation.de> parents: 725 diff changeset	93 ) (*Tree, error) {
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	94 oc.Lock()
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	95 defer oc.Unlock()
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	96
724 6ab0c170e5b8 Moved octree stuff to own package. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 723 diff changeset	97 key := cacheKey{date, bottleneck}
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	98 entry := oc.entries[key]
725 e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	99
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	100 var data []byte
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	101 var checksum string
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	102
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	103 if entry == nil {
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	104 // fetch from database
725 e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	105 err := conn.QueryRowContext(
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	106 ctx, fetchOctreeSQL, bottleneck, date).Scan(&checksum, &data)
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	107 switch {
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	108 case err == sql.ErrNoRows:
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	109 return nil, nil
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	110 case err != nil:
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	111 return nil, err
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	112 }
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	113 } else {
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	114 // check if we are not outdated.
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	115 err := conn.QueryRowContext(
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	116 ctx, checkOctreeSQL, bottleneck, date, entry.checksum).Scan(&data)
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	117 switch {
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	118 case err == sql.ErrNoRows:
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	119 return nil, nil
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	120 case err != nil:
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	121 return nil, err
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	122 }
725 e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	123 if data == nil { // we are still current
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	124 entry.access = time.Now()
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	125 return entry.tree, nil
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	126 }
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	127 }
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	128
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	129 tree, err := Deserialize(data)
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	130 if err != nil {
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	131 return nil, err
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	132 }
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	133
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	134 now := time.Now()
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	135
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	136 if entry != nil {
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	137 entry.tree = tree
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	138 entry.access = now
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	139 return tree, nil
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	140 }
7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	141
725 e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	142 for len(oc.entries) >= maxCacheEntries {
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	143 // Evict the entry that is accessed the longest time ago.
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	144 var oldestKey cacheKey
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	145 oldest := now
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	146
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	147 for k, v := range oc.entries {
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	148 if v.access.Before(oldest) {
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	149 oldest = v.access
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	150 oldestKey = k
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	151 }
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	152 }
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	153 delete(oc.entries, oldestKey)
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	154 }
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	155
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	156 oc.entries[key] = &cacheEntry{
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	157 checksum: checksum,
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	158 tree: tree,
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	159 access: now,
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	160 }
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	161
e0437ec46798 Finished the octree cache. TODO: implement the deserialization. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: 724 diff changeset	162 return tree, nil
723 7eed7ff3142d Started with model to load octrees from database. Sascha L. Teichmann <sascha.teichmann@intevation.de> parents: diff changeset	163 }

Mercurial > gemma

annotate pkg/octree/cache.go @ 1234:1a5564655f2a