| /* |
| * 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.cassandra.db.virtual; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import javax.annotation.Nullable; |
| |
| import com.google.common.collect.Iterables; |
| |
| import org.apache.cassandra.schema.KeyspaceMetadata; |
| import org.apache.cassandra.schema.TableId; |
| import org.apache.cassandra.schema.TableMetadata; |
| |
| public final class VirtualKeyspaceRegistry |
| { |
| public static final VirtualKeyspaceRegistry instance = new VirtualKeyspaceRegistry(); |
| |
| private final Map<String, VirtualKeyspace> virtualKeyspaces = new ConcurrentHashMap<>(); |
| private final Map<TableId, VirtualTable> virtualTables = new ConcurrentHashMap<>(); |
| |
| private VirtualKeyspaceRegistry() |
| { |
| } |
| |
| public void register(VirtualKeyspace keyspace) |
| { |
| virtualKeyspaces.put(keyspace.name(), keyspace); |
| keyspace.tables().forEach(t -> virtualTables.put(t.metadata().id, t)); |
| } |
| |
| @Nullable |
| public VirtualKeyspace getKeyspaceNullable(String name) |
| { |
| return virtualKeyspaces.get(name); |
| } |
| |
| @Nullable |
| public VirtualTable getTableNullable(TableId id) |
| { |
| return virtualTables.get(id); |
| } |
| |
| @Nullable |
| public KeyspaceMetadata getKeyspaceMetadataNullable(String name) |
| { |
| VirtualKeyspace keyspace = virtualKeyspaces.get(name); |
| return null != keyspace ? keyspace.metadata() : null; |
| } |
| |
| @Nullable |
| public TableMetadata getTableMetadataNullable(TableId id) |
| { |
| VirtualTable table = virtualTables.get(id); |
| return null != table ? table.metadata() : null; |
| } |
| |
| public Iterable<KeyspaceMetadata> virtualKeyspacesMetadata() |
| { |
| return Iterables.transform(virtualKeyspaces.values(), VirtualKeyspace::metadata); |
| } |
| } |