1 files changed, 159 insertions, 0 deletions
diff --git a/openecomp-be/lib/openecomp-sdc-versioning-lib/openecomp-sdc-versioning-core/src/main/java/org/openecomp/sdc/versioning/dao/impl/VersionableEntityDaoCassandraImpl.java b/openecomp-be/lib/openecomp-sdc-versioning-lib/openecomp-sdc-versioning-core/src/main/java/org/openecomp/sdc/versioning/dao/impl/VersionableEntityDaoCassandraImpl.java
new file mode 100644
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+++ b/openecomp-be/lib/openecomp-sdc-versioning-lib/openecomp-sdc-versioning-core/src/main/java/org/openecomp/sdc/versioning/dao/impl/VersionableEntityDaoCassandraImpl.java
@@ -0,0 +1,159 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * Copyright (C) 2017 AT&T Intellectual Property. 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.sdc.versioning.dao.impl;
+
+import com.datastax.driver.core.ColumnDefinitions;
+import com.datastax.driver.core.ResultSet;
+import com.datastax.driver.core.Row;
+import com.datastax.driver.mapping.UDTMapper;
+import org.openecomp.core.nosqldb.api.NoSqlDb;
+import org.openecomp.core.nosqldb.factory.NoSqlDbFactory;
+import org.openecomp.core.util.UniqueValueUtil;
+import org.openecomp.core.utilities.CommonMethods;
+import org.openecomp.sdc.versioning.dao.VersionableEntityDao;
+import org.openecomp.sdc.versioning.dao.types.Version;
+import org.openecomp.sdc.versioning.types.UniqueValueMetadata;
+import org.openecomp.sdc.versioning.types.VersionableEntityMetadata;
+
+import org.slf4j.LoggerFactory;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
+class VersionableEntityDaoCassandraImpl implements VersionableEntityDao {
+
+  private static final NoSqlDb noSqlDb = NoSqlDbFactory.getInstance().createInterface();
+  private static org.slf4j.Logger Logger =
+      LoggerFactory.getLogger(VersionableEntityDaoCassandraImpl.class);
+  private static UDTMapper<Version> versionMapper =
+      noSqlDb.getMappingManager().udtMapper(Version.class);
+
+  private static String commaSeparatedQuestionMarks(int size) {
+    StringBuilder sb = new StringBuilder(size * 2 - 1);
+    for (int i = 0; i < size; i++) {
+      if (i > 0) {
+        sb.append(',');
+      }
+      sb.append('?');
+    }
+    return sb.toString();
+
+  }
+
+  @Override
+  public void initVersion(VersionableEntityMetadata metadata, String entityId, Version baseVersion,
+                          Version newVersion) {
+    ResultSet rows = loadVersionRows(metadata, entityId, baseVersion);
+    List<String> columnNames =
+        rows.getColumnDefinitions().asList().stream().map(ColumnDefinitions.Definition::getName)
+            .collect(Collectors.toList());
+
+    String insertCql = String.format("insert into %s (%s) values (%s)", metadata.getName(),
+        CommonMethods.listToSeparatedString(columnNames, ','),
+        commaSeparatedQuestionMarks(columnNames.size()));
+    Logger.debug("insertCql", insertCql);
+
+    for (Row row : rows) {
+      List<Object> columnValues = new ArrayList<>();
+      Map<String, Object> columnNameToValue = new HashMap<>();
+
+      for (String columnName : columnNames) {
+        if (metadata.getVersionIdentifierName().equals(columnName)) {
+          columnValues.add(versionMapper.toUDT(newVersion));
+          columnNameToValue.put(columnName, newVersion.toString());
+        } else {
+          Object value = row.getObject(columnName);
+          columnValues.add(value);
+          columnNameToValue.put(columnName, value);
+        }
+      }
+
+      initRowUniqueValues(metadata.getUniqueValuesMetadata(), columnNameToValue);
+
+      noSqlDb.execute(insertCql, columnValues.toArray());
+    }
+  }
+
+  private ResultSet loadVersionRows(VersionableEntityMetadata metadata, String entityId,
+                                    Version version) {
+    String selectCql = String.format("select * from %s where %s=? and %s=?", metadata.getName(),
+        metadata.getIdentifierName(), metadata.getVersionIdentifierName());
+    Logger.debug("selectCql", selectCql);
+    Logger.debug("entityId", entityId);
+    Logger.debug("version", version);
+
+    return noSqlDb.execute(selectCql, entityId, versionMapper.toUDT(version));
+  }
+
+  @Override
+  public void deleteVersion(VersionableEntityMetadata metadata, String entityId,
+                            Version versionToDelete) {
+    deleteRowsUniqueValues(metadata, entityId, versionToDelete);
+
+    String deleteCql = String.format("delete from %s where %s=? and %s=?", metadata.getName(),
+        metadata.getIdentifierName(), metadata.getVersionIdentifierName());
+    noSqlDb.execute(deleteCql, entityId, versionMapper.toUDT(versionToDelete));
+  }
+
+  private void initRowUniqueValues(List<UniqueValueMetadata> metadata,
+                                   Map<String, Object> columnNameToValue) {
+    for (UniqueValueMetadata uniqueMetadata : metadata) {
+      List<String> uniqueValueCombination = uniqueMetadata.getUniqueConstraintIdentifiers().stream()
+          .map(colName -> (String) columnNameToValue.get(colName)).collect(Collectors.toList());
+      UniqueValueUtil.createUniqueValue(uniqueMetadata.getType(),
+          uniqueValueCombination.toArray(new String[uniqueValueCombination.size()]));
+    }
+  }
+
+  private void deleteRowUniqueValues(List<UniqueValueMetadata> metadata,
+                                     Map<String, Object> columnNameToValue) {
+    for (UniqueValueMetadata uniqueMetadata : metadata) {
+      List<String> uniqueValueCombination = uniqueMetadata.getUniqueConstraintIdentifiers().stream()
+          .map(colName -> (String) columnNameToValue.get(colName)).collect(Collectors.toList());
+      UniqueValueUtil.deleteUniqueValue(uniqueMetadata.getType(),
+          uniqueValueCombination.toArray(new String[uniqueValueCombination.size()]));
+    }
+  }
+
+  private void deleteRowsUniqueValues(VersionableEntityMetadata metadata, String entityId,
+                                      Version version) {
+    if (metadata.getUniqueValuesMetadata().isEmpty()) {
+      return;
+    }
+    ResultSet rows = loadVersionRows(metadata, entityId, version);
+    List<String> columnNames =
+        rows.getColumnDefinitions().asList().stream().map(ColumnDefinitions.Definition::getName)
+            .collect(Collectors.toList());
+
+    for (Row row : rows) {
+      Map<String, Object> columnNameToValue =
+          columnNames.stream().filter(name -> row.getObject(name) != null).collect(Collectors
+              .toMap(Function.identity(),
+                  columnName -> metadata.getVersionIdentifierName().equals(columnName) ? version
+                      .toString() : row.getObject(columnName)));
+      deleteRowUniqueValues(metadata.getUniqueValuesMetadata(), columnNameToValue);
+    }
+  }
+}