1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.controller.archive;
import com.yahoo.config.provision.TenantName;
import com.yahoo.config.provision.zone.ZoneId;
import com.yahoo.vespa.hosted.controller.Controller;
import com.yahoo.vespa.hosted.controller.api.integration.archive.ArchiveBuckets;
import com.yahoo.vespa.hosted.controller.api.integration.archive.ArchiveService;
import com.yahoo.vespa.hosted.controller.api.integration.archive.VespaManagedArchiveBucket;
import com.yahoo.vespa.hosted.controller.persistence.CuratorDb;
import java.net.URI;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.ConcurrentHashMap;
import java.util.stream.Collectors;
/**
* This class decides which tenant goes in what bucket, and creates new buckets when required.
*
* @author andreer
*/
public class CuratorArchiveBucketDb {
/**
* Archive URIs are often requested because they are returned in /application/v4 API. Since they
* never change, it's safe to cache them and only update on misses
*/
private final Map<ZoneId, Map<TenantName, String>> archiveUriCache = new ConcurrentHashMap<>();
private final ArchiveService archiveService;
private final CuratorDb curatorDb;
public CuratorArchiveBucketDb(Controller controller) {
this.archiveService = controller.serviceRegistry().archiveService();
this.curatorDb = controller.curator();
}
public Optional<URI> archiveUriFor(ZoneId zoneId, TenantName tenant, boolean createIfMissing) {
return getBucketNameFromCache(zoneId, tenant)
.or(() -> createIfMissing ? Optional.of(assignToBucket(zoneId, tenant)) : Optional.empty())
.map(bucketName -> archiveService.bucketURI(zoneId, bucketName));
}
private String assignToBucket(ZoneId zoneId, TenantName tenant) {
try (var lock = curatorDb.lockArchiveBuckets(zoneId)) {
ArchiveBuckets archiveBuckets = buckets(zoneId);
updateArchiveUriCache(zoneId, archiveBuckets);
return getBucketNameFromCache(zoneId, tenant) // Some other thread might have assigned it before we grabbed the lock
.orElseGet(() -> {
// If not, find an existing bucket with space
VespaManagedArchiveBucket bucketToAssignTo = archiveBuckets.vespaManaged().stream()
.filter(bucket -> archiveService.canAddTenantToBucket(zoneId, bucket))
.findAny()
// Or create a new one
.orElseGet(() -> archiveService.createArchiveBucketFor(zoneId));
ArchiveBuckets updated = archiveBuckets.with(bucketToAssignTo.withTenant(tenant));
curatorDb.writeArchiveBuckets(zoneId, updated);
updateArchiveUriCache(zoneId, updated);
return bucketToAssignTo.bucketName();
});
}
}
public ArchiveBuckets buckets(ZoneId zoneId) {
return curatorDb.readArchiveBuckets(zoneId);
}
private Optional<String> getBucketNameFromCache(ZoneId zoneId, TenantName tenantName) {
return Optional.ofNullable(archiveUriCache.get(zoneId)).map(map -> map.get(tenantName));
}
private void updateArchiveUriCache(ZoneId zoneId, ArchiveBuckets archiveBuckets) {
Map<TenantName, String> bucketNameByTenant = archiveBuckets.vespaManaged().stream()
.flatMap(bucket -> bucket.tenants().stream()
.map(tenant -> Map.entry(tenant, bucket.bucketName())))
.collect(Collectors.toUnmodifiableMap(Map.Entry::getKey, Map.Entry::getValue));
archiveUriCache.put(zoneId, bucketNameByTenant);
}
}
|
