| /* |
| * 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.calcite.schema.Table; |
| import org.apache.drill.common.exceptions.DrillRuntimeException; |
| import org.apache.drill.common.expression.SchemaPath; |
| import org.apache.drill.exec.planner.logical.DrillTable; |
| import org.apache.drill.exec.proto.UserProtos; |
| import org.apache.drill.exec.store.AbstractSchema; |
| import org.apache.drill.exec.store.drill.plugin.DrillScanSpec; |
| import org.apache.drill.exec.store.drill.plugin.DrillStoragePlugin; |
| import org.apache.drill.exec.store.drill.plugin.DrillStoragePluginConfig; |
| import org.apache.drill.exec.store.plan.rel.PluginDrillTable; |
| import org.apache.drill.exec.util.ImpersonationUtil; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Optional; |
| import java.util.Set; |
| import java.util.concurrent.ExecutionException; |
| import java.util.stream.Collectors; |
| |
| public class DrillPluginSchema extends AbstractSchema { |
| |
| private final DrillStoragePlugin plugin; |
| |
| private final Map<String, DrillPluginSchema> schemaMap = new HashMap<>(); |
| |
| private final Map<String, DrillTable> drillTables = new HashMap<>(); |
| private final String userName; |
| |
| public DrillPluginSchema(DrillStoragePlugin plugin, String name, String userName) { |
| super(Collections.emptyList(), name); |
| this.plugin = plugin; |
| this.userName = Optional.ofNullable(userName).orElse(ImpersonationUtil.getProcessUserName()); |
| |
| getSchemasList().stream() |
| .map(UserProtos.SchemaMetadata::getSchemaName) |
| .map(String::toLowerCase) |
| .map(SchemaPath::parseFromString) |
| .forEach(this::addSubSchema); |
| } |
| |
| private DrillPluginSchema(DrillStoragePlugin plugin, List<String> parentSchemaPath, String name, String userName) { |
| super(parentSchemaPath, name); |
| this.plugin = plugin; |
| this.userName = userName; |
| } |
| |
| private void addSubSchema(SchemaPath path) { |
| DrillPluginSchema drillSchema = new DrillPluginSchema(plugin, getSchemaPath(), path.getRootSegmentPath(), userName); |
| schemaMap.put(path.getRootSegmentPath(), drillSchema); |
| while (!path.isLeaf()) { |
| path = new SchemaPath(path.getRootSegment().getChild().getNameSegment()); |
| DrillPluginSchema child = new DrillPluginSchema(plugin, drillSchema.getSchemaPath(), path.getRootSegmentPath(), userName); |
| drillSchema.schemaMap.put(path.getRootSegmentPath(), child); |
| drillSchema = child; |
| } |
| } |
| |
| private List<UserProtos.SchemaMetadata> getSchemasList() { |
| try { |
| return plugin.getClient(userName).getSchemas(null, null) |
| .get().getSchemasList(); |
| } catch (InterruptedException | ExecutionException e) { |
| throw new DrillRuntimeException(e); |
| } |
| } |
| |
| @Override |
| public AbstractSchema getSubSchema(String name) { |
| return schemaMap.get(name); |
| } |
| |
| void setHolder(SchemaPlus plusOfThis) { |
| getSubSchemaNames().forEach(s -> plusOfThis.add(s, getSubSchema(s))); |
| } |
| |
| @Override |
| public boolean showInInformationSchema() { |
| return true; |
| } |
| |
| @Override |
| public Set<String> getSubSchemaNames() { |
| return schemaMap.keySet(); |
| } |
| |
| @Override |
| public Table getTable(String name) { |
| return drillTables.computeIfAbsent(name, |
| key -> { |
| DrillScanSpec drillScanSpec = new DrillScanSpec(getSchemaPath(), key); |
| return new PluginDrillTable(plugin, getName(), null, drillScanSpec, plugin.convention()); |
| }); |
| } |
| |
| @Override |
| public String getTypeName() { |
| return DrillStoragePluginConfig.NAME; |
| } |
| |
| @Override |
| public Set<String> getTableNames() { |
| try { |
| List<String> schemaPaths = getSchemaPath(); |
| String schemaPath = SchemaPath.getCompoundPath( |
| schemaPaths.subList(1, schemaPaths.size()).toArray(new String[0])).getAsUnescapedPath(); |
| UserProtos.LikeFilter schemaNameFilter = UserProtos.LikeFilter.newBuilder() |
| .setPattern(schemaPath) |
| .build(); |
| return plugin.getClient(userName).getTables(null, schemaNameFilter, null, null) |
| .get().getTablesList().stream() |
| .map(UserProtos.TableMetadata::getTableName) |
| .collect(Collectors.toSet()); |
| } catch (InterruptedException | ExecutionException e) { |
| throw new DrillRuntimeException(e); |
| } |
| } |
| } |