| /* |
| * 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.drill.exec.store.drill.plugin.schema; |
| |
| import org.apache.calcite.schema.SchemaPlus; |
| import org.apache.commons.lang3.tuple.Pair; |
| import org.apache.drill.common.exceptions.DrillRuntimeException; |
| import org.apache.drill.exec.store.AbstractSchemaFactory; |
| import org.apache.drill.exec.store.SchemaConfig; |
| import org.apache.drill.exec.store.drill.plugin.DrillStoragePlugin; |
| import org.apache.drill.exec.util.ImpersonationUtil; |
| import com.google.common.cache.CacheBuilder; |
| import com.google.common.cache.CacheLoader; |
| import com.google.common.cache.LoadingCache; |
| |
| import java.util.Optional; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.TimeUnit; |
| |
| public class DrillSchemaFactory extends AbstractSchemaFactory { |
| |
| private final LoadingCache<Pair<String, String>, DrillPluginSchema> databases; |
| private final DrillStoragePlugin plugin; |
| |
| public DrillSchemaFactory(DrillStoragePlugin plugin, String schemaName) { |
| super(schemaName); |
| this.plugin = plugin; |
| |
| databases = CacheBuilder |
| .newBuilder() |
| .expireAfterAccess(1, TimeUnit.MINUTES) |
| .build(new DatabaseLoader()); |
| } |
| |
| @Override |
| public void registerSchemas(SchemaConfig schemaConfig, SchemaPlus parent) { |
| try { |
| String userName = Optional.ofNullable(schemaConfig.getUserName()).orElse(ImpersonationUtil.getProcessUserName()); |
| DrillPluginSchema schema = databases.get(Pair.of(getName(), userName)); |
| SchemaPlus hPlus = parent.add(getName(), schema); |
| schema.setHolder(hPlus); |
| } catch (ExecutionException e) { |
| throw new DrillRuntimeException(e); |
| } |
| } |
| |
| private class DatabaseLoader extends CacheLoader<Pair<String, String>, DrillPluginSchema> { |
| @Override |
| public DrillPluginSchema load(Pair<String, String> key) { |
| return new DrillPluginSchema(plugin, key.getKey(), key.getValue()); |
| } |
| } |
| } |