| /* |
| * 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.http; |
| |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| import org.apache.calcite.schema.SchemaPlus; |
| import org.apache.calcite.schema.Table; |
| import org.apache.drill.common.exceptions.UserException; |
| import org.apache.drill.common.map.CaseInsensitiveMap; |
| import org.apache.drill.exec.planner.logical.DynamicDrillTable; |
| import org.apache.drill.exec.store.AbstractSchema; |
| import org.apache.drill.exec.store.AbstractSchemaFactory; |
| import org.apache.drill.exec.store.SchemaConfig; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public class HttpSchemaFactory extends AbstractSchemaFactory { |
| private static final Logger logger = LoggerFactory.getLogger(HttpSchemaFactory.class); |
| |
| private final HttpStoragePlugin plugin; |
| |
| public HttpSchemaFactory(HttpStoragePlugin plugin) { |
| super(plugin.getName()); |
| this.plugin = plugin; |
| } |
| |
| @Override |
| public void registerSchemas(SchemaConfig schemaConfig, SchemaPlus parent) { |
| HttpSchema schema = new HttpSchema(plugin, schemaConfig.getUserName()); |
| logger.debug("Registering {} {}", schema.getName(), schema.toString()); |
| |
| SchemaPlus schemaPlus = parent.add(getName(), schema); |
| schema.setHolder(schemaPlus); |
| } |
| |
| protected static class HttpSchema extends AbstractSchema { |
| |
| private final HttpStoragePlugin plugin; |
| private final Map<String, HttpAPIConnectionSchema> subSchemas = CaseInsensitiveMap.newHashMap(); |
| private final Map<String, HttpApiConfig> tables = CaseInsensitiveMap.newHashMap(); |
| private final Map<String, DynamicDrillTable> activeTables = CaseInsensitiveMap.newHashMap(); |
| private final String queryUserName; |
| |
| public HttpSchema(HttpStoragePlugin plugin, String queryUserName) { |
| super(Collections.emptyList(), plugin.getName()); |
| this.queryUserName = queryUserName; |
| this.plugin = plugin; |
| for (Entry<String, HttpApiConfig> entry : plugin.getConfig().connections().entrySet()) { |
| String configName = entry.getKey(); |
| HttpApiConfig config = entry.getValue(); |
| if (config.requireTail()) { |
| subSchemas.put(configName, new HttpAPIConnectionSchema(this, configName, plugin, queryUserName)); |
| } else { |
| tables.put(configName, config); |
| } |
| } |
| } |
| |
| void setHolder(SchemaPlus plusOfThis) { |
| for (Entry<String, HttpAPIConnectionSchema> entry : subSchemas.entrySet()) { |
| plusOfThis.add(entry.getKey(), entry.getValue()); |
| } |
| } |
| |
| @Override |
| public AbstractSchema getSubSchema(String name) { |
| HttpAPIConnectionSchema subSchema = subSchemas.get(name); |
| if (subSchema != null) { |
| return subSchema; |
| } else if (tables.containsKey(name)) { |
| return null; |
| } else { |
| throw UserException |
| .connectionError() |
| .message("API '%s' does not exist in HTTP storage plugin '%s'", name, getName()) |
| .build(logger); |
| } |
| } |
| |
| @Override |
| public Table getTable(String name) { |
| DynamicDrillTable table = activeTables.get(name); |
| if (table != null) { |
| return table; |
| } |
| HttpApiConfig config = tables.get(name); |
| if (config != null) { |
| // Register a new table |
| return registerTable(name, new DynamicDrillTable(plugin, plugin.getName(), |
| new HttpScanSpec(plugin.getName(), name, null, |
| plugin.getConfig().copyForPlan(name), plugin.getTokenTable(), queryUserName, plugin.getRegistry()))); |
| } else { |
| return null; // Unknown table |
| } |
| } |
| |
| @Override |
| public String getTypeName() { |
| return HttpStoragePluginConfig.NAME; |
| } |
| |
| private DynamicDrillTable registerTable(String name, DynamicDrillTable table) { |
| activeTables.put(name, table); |
| return table; |
| } |
| } |
| } |