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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.controller.persistence;
import com.yahoo.config.provision.TenantName;
import com.yahoo.slime.Cursor;
import com.yahoo.slime.Inspector;
import com.yahoo.slime.Slime;
import com.yahoo.slime.SlimeUtils;
import com.yahoo.vespa.hosted.controller.api.integration.archive.ArchiveBucket;
import java.util.Set;
import java.util.stream.Collectors;
/**
* (de)serializes tenant/bucket mappings for a zone
*
* @author andreer
*/
public class ArchiveBucketsSerializer {
// WARNING: Since there are multiple servers in a ZooKeeper cluster and they upgrade one by one
// (and rewrite all nodes on startup), changes to the serialized format must be made
// such that what is serialized on version N+1 can be read by version N:
// - ADDING FIELDS: Always ok
// - REMOVING FIELDS: Stop reading the field first. Stop writing it on a later version.
// - CHANGING THE FORMAT OF A FIELD: Don't do it bro.
private final static String bucketsFieldName = "buckets";
private final static String bucketNameFieldName = "bucketName";
private final static String keyArnFieldName = "keyArn";
private final static String tenantsFieldName = "tenantIds";
public static Slime toSlime(Set<ArchiveBucket> archiveBuckets) {
Slime slime = new Slime();
Cursor rootObject = slime.setObject();
Cursor bucketsArray = rootObject.setArray(bucketsFieldName);
archiveBuckets.forEach(bucket -> {
Cursor cursor = bucketsArray.addObject();
cursor.setString(bucketNameFieldName, bucket.bucketName());
cursor.setString(keyArnFieldName, bucket.keyArn());
Cursor tenants = cursor.setArray(tenantsFieldName);
bucket.tenants().forEach(tenantName -> tenants.addString(tenantName.value()));
}
);
return slime;
}
public static Set<ArchiveBucket> fromSlime(Inspector inspector) {
return SlimeUtils.entriesStream(inspector.field(bucketsFieldName))
.map(ArchiveBucketsSerializer::fromInspector)
.collect(Collectors.toUnmodifiableSet());
}
private static ArchiveBucket fromInspector(Inspector inspector) {
Set<TenantName> tenants = SlimeUtils.entriesStream(inspector.field(tenantsFieldName))
.map(i -> TenantName.from(i.asString()))
.collect(Collectors.toUnmodifiableSet());
return new ArchiveBucket(
inspector.field(bucketNameFieldName).asString(),
inspector.field(keyArnFieldName).asString())
.withTenants(tenants);
}
public static Set<ArchiveBucket> fromJsonString(String zkData) {
return fromSlime(SlimeUtils.jsonToSlime(zkData).get());
}
}
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