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/*
* (c) Copyright 2018 Palantir Technologies Inc. All rights reserved.
*
* Licensed 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.
*/
package com.palantir.atlasdb.keyvalue.cassandra;
import com.google.common.annotations.VisibleForTesting;
import com.palantir.atlasdb.keyvalue.api.KeyValueService;
import com.palantir.common.annotation.Idempotent;
import com.palantir.logsafe.Preconditions;
import com.palantir.timestamp.TimestampStoreInvalidator;
public final class CassandraTimestampStoreInvalidator implements TimestampStoreInvalidator {
private final CassandraTimestampBackupRunner backupRunner;
@VisibleForTesting
CassandraTimestampStoreInvalidator(CassandraTimestampBackupRunner backupRunner) {
this.backupRunner = backupRunner;
}
public static CassandraTimestampStoreInvalidator create(KeyValueService keyValueService) {
Preconditions.checkArgument(
keyValueService instanceof CassandraKeyValueService,
"CassandraTimestampStoreInvalidator should be instantiated with a CassandraKeyValueService!");
CassandraKeyValueService cassandraKeyValueService = (CassandraKeyValueService) keyValueService;
return new CassandraTimestampStoreInvalidator(new CassandraTimestampBackupRunner(cassandraKeyValueService));
}
@Override
@Idempotent
public long backupAndInvalidate() {
backupRunner.ensureTimestampTableExists();
return backupRunner.backupExistingTimestamp();
}
@Override
@Idempotent
public void revalidateFromBackup() {
backupRunner.ensureTimestampTableExists();
backupRunner.restoreFromBackup();
}
}