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@@ -0,0 +1,54 @@
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+/*
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+ * Licensed to the Apache Software Foundation (ASF) under one or more
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+ * contributor license agreements. See the NOTICE file distributed with
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+ * this work for additional information regarding copyright ownership.
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+ * The ASF licenses this file to You under the Apache License, Version 2.0
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+ * (the "License"); you may not use this file except in compliance with
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+ * the License. You may obtain a copy of the License at
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+ *
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+ * http://www.apache.org/licenses/LICENSE-2.0
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+ *
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+ * Unless required by applicable law or agreed to in writing, software
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+ * distributed under the License is distributed on an "AS IS" BASIS,
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+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ * See the License for the specific language governing permissions and
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+ * limitations under the License.
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+ */
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+
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+package org.apache.dolphinscheduler.dao.repository.impl;
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+
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+import org.apache.dolphinscheduler.dao.entity.DsVersion;
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+import org.apache.dolphinscheduler.dao.mapper.DsVersionMapper;
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+import org.apache.dolphinscheduler.dao.repository.BaseDao;
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+import org.apache.dolphinscheduler.dao.repository.DsVersionDao;
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+
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+import org.apache.commons.collections4.CollectionUtils;
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+
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+import java.util.List;
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+import java.util.Optional;
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+
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+import lombok.NonNull;
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+import lombok.extern.slf4j.Slf4j;
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+
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+import org.springframework.stereotype.Repository;
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+
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+@Slf4j
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+@Repository
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+public class DsVersionDaoImpl extends BaseDao<DsVersion, DsVersionMapper> implements DsVersionDao {
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+
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+ public DsVersionDaoImpl(@NonNull DsVersionMapper dsVersionMapper) {
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+ super(dsVersionMapper);
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+ }
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+
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+ @Override
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+ public Optional<DsVersion> selectVersion() {
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+ List<DsVersion> dsVersions = mybatisMapper.selectList(null);
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+ if (CollectionUtils.isEmpty(dsVersions)) {
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+ log.info("There is no version information in the database");
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+ }
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+ if (dsVersions.size() > 1) {
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+ log.info("There are multiple version information in the database");
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+ }
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+ return dsVersions.stream().findFirst();
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+ }
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+}
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