| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.skywalking.oap.server.core.storage.model; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| import lombok.Getter; |
| import org.apache.skywalking.oap.server.library.util.CollectionUtils; |
| |
| /** |
| * @since 9.0.0 |
| */ |
| @Getter |
| public class SQLDatabaseExtension { |
| private final List<MultiColumnsIndex> indices = new ArrayList<>(5); |
| |
| public void appendIndex(MultiColumnsIndex index) { |
| indices.add(index); |
| } |
| |
| /** |
| * The multiple columns index if the storage could support this mode. Many NO-SQL support one column index only, in that |
| * case, this could be ignored in the implementation level. |
| */ |
| @Getter |
| public static class MultiColumnsIndex { |
| private String[] columns; |
| |
| public MultiColumnsIndex(String mainColumn, final String[] withColumns) { |
| if (CollectionUtils.isNotEmpty(withColumns)) { |
| columns = new String[withColumns.length + 1]; |
| columns[0] = mainColumn; |
| System.arraycopy(withColumns, 0, columns, 1, withColumns.length); |
| } else { |
| throw new IllegalArgumentException("ExtraQueryIndex required withColumns as a not empty list."); |
| } |
| |
| } |
| |
| /** |
| * Keep the same name replacement as {@link ColumnName#overrideName(String, String)} |
| * |
| * @param oldName to be replaced. |
| * @param newName to use in the storage level. |
| */ |
| public void overrideName(String oldName, String newName) { |
| for (int i = 0; i < columns.length; i++) { |
| if (columns[i].equals(oldName)) { |
| columns[i] = newName; |
| } |
| } |
| } |
| } |
| } |