| /* |
| * 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.schema; |
| |
| import java.util.function.Supplier; |
| import javax.annotation.Nullable; |
| |
| import org.apache.cassandra.db.Keyspace; |
| import org.apache.cassandra.exceptions.UnknownTableException; |
| import org.apache.cassandra.io.sstable.Descriptor; |
| |
| public interface SchemaProvider |
| { |
| @Nullable |
| Keyspace getKeyspaceInstance(String keyspaceName); |
| |
| Keyspace maybeAddKeyspaceInstance(String keyspaceName, Supplier<Keyspace> loadFunction); |
| |
| @Nullable |
| KeyspaceMetadata getKeyspaceMetadata(String keyspaceName); |
| |
| @Nullable |
| TableMetadata getTableMetadata(TableId id); |
| |
| @Nullable |
| TableMetadata getTableMetadata(String keyspace, String table); |
| |
| default TableMetadata getExistingTableMetadata(TableId id) throws UnknownTableException |
| { |
| TableMetadata metadata = getTableMetadata(id); |
| if (metadata != null) |
| return metadata; |
| |
| String message = |
| String.format("Couldn't find table with id %s. If a table was just created, this is likely due to the schema" |
| + "not being fully propagated. Please wait for schema agreement on table creation.", |
| id); |
| throw new UnknownTableException(message, id); |
| } |
| |
| @Nullable |
| TableMetadataRef getTableMetadataRef(String keyspace, String table); |
| |
| @Nullable |
| TableMetadataRef getTableMetadataRef(TableId id); |
| |
| @Nullable |
| default TableMetadataRef getTableMetadataRef(Descriptor descriptor) |
| { |
| return getTableMetadataRef(descriptor.ksname, descriptor.cfname); |
| } |
| } |