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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.hosted.controller.api.integration.dns;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
import java.util.stream.Collectors;
/**
* An in-memory name service for testing purposes.
*
* @author mpolden
*/
public class MemoryNameService implements NameService {
private final Set<Record> records = new TreeSet<>();
public Set<Record> records() {
return Collections.unmodifiableSet(records);
}
@Override
public Record createCname(RecordName name, RecordData canonicalName) {
var record = new Record(Record.Type.CNAME, name, canonicalName);
records.add(record);
return record;
}
@Override
public List<Record> createAlias(RecordName name, Set<AliasTarget> targets) {
var records = targets.stream()
.sorted((a, b) -> Comparator.comparing(AliasTarget::name).compare(a, b))
.map(target -> new Record(Record.Type.ALIAS, name, target.asData()))
.collect(Collectors.toList());
// Satisfy idempotency contract of interface
removeRecords(findRecords(Record.Type.ALIAS, name));
this.records.addAll(records);
return records;
}
@Override
public List<Record> createTxtRecords(RecordName name, List<RecordData> txtData) {
var records = txtData.stream()
.map(data -> new Record(Record.Type.TXT, name, data))
.collect(Collectors.toList());
this.records.addAll(records);
return records;
}
@Override
public List<Record> findRecords(Record.Type type, RecordName name) {
return records.stream()
.filter(record -> record.type() == type && record.name().equals(name))
.collect(Collectors.toUnmodifiableList());
}
@Override
public List<Record> findRecords(Record.Type type, RecordData data) {
return records.stream()
.filter(record -> record.type() == type && record.data().equals(data))
.collect(Collectors.toUnmodifiableList());
}
@Override
public void updateRecord(Record record, RecordData newData) {
var records = findRecords(record.type(), record.name());
if (records.isEmpty()) {
throw new IllegalArgumentException("No record with data '" + newData.asString() + "' exists");
}
if (records.size() > 1) {
throw new IllegalArgumentException("Cannot update multi-value record '" + record.name().asString() +
"' with '" + newData.asString() + "'");
}
var existing = records.get(0);
this.records.remove(existing);
this.records.add(new Record(existing.type(), existing.name(), newData));
}
@Override
public void removeRecords(List<Record> records) {
this.records.removeAll(records);
}
}
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