| /* |
| * 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; |
| |
| import com.fasterxml.jackson.core.type.TypeReference; |
| import org.apache.calcite.plan.Convention; |
| import org.apache.calcite.plan.RelOptRule; |
| import org.apache.calcite.schema.SchemaPlus; |
| import org.apache.drill.common.AutoCloseables; |
| import org.apache.drill.common.JSONOptions; |
| import org.apache.drill.exec.client.DrillClient; |
| import org.apache.drill.exec.ops.OptimizerRulesContext; |
| import org.apache.drill.exec.physical.base.AbstractGroupScan; |
| import org.apache.drill.exec.planner.PlannerPhase; |
| import org.apache.drill.exec.server.DrillbitContext; |
| import org.apache.drill.exec.store.AbstractStoragePlugin; |
| import org.apache.drill.exec.store.PluginRulesProviderImpl; |
| import org.apache.drill.exec.store.SchemaConfig; |
| import org.apache.drill.exec.store.StoragePluginRulesSupplier; |
| import org.apache.drill.exec.store.drill.plugin.plan.DrillPluginImplementor; |
| import org.apache.drill.exec.store.drill.plugin.schema.DrillSchemaFactory; |
| import org.apache.drill.exec.store.plan.rel.PluginRel; |
| |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| public class DrillStoragePlugin extends AbstractStoragePlugin { |
| |
| private final DrillStoragePluginConfig drillConfig; |
| private final DrillSchemaFactory schemaFactory; |
| private final StoragePluginRulesSupplier storagePluginRulesSupplier; |
| private final Map<String, DrillClient> userClients; |
| |
| public DrillStoragePlugin( |
| DrillStoragePluginConfig drillConfig, |
| DrillbitContext context, |
| String name) { |
| super(context, name); |
| this.drillConfig = drillConfig; |
| this.schemaFactory = new DrillSchemaFactory(this, name); |
| this.storagePluginRulesSupplier = storagePluginRulesSupplier(name); |
| |
| assert drillConfig.getConnection().startsWith(DrillStoragePluginConfig.CONNECTION_STRING_PREFIX); |
| |
| this.userClients = new ConcurrentHashMap<>(); |
| } |
| |
| private static StoragePluginRulesSupplier storagePluginRulesSupplier(String name) { |
| Convention convention = new Convention.Impl("DRILL." + name, PluginRel.class); |
| return StoragePluginRulesSupplier.builder() |
| .rulesProvider(new PluginRulesProviderImpl(convention, DrillPluginImplementor::new)) |
| .supportsProjectPushdown(true) |
| .supportsSortPushdown(true) |
| .supportsAggregatePushdown(true) |
| .supportsFilterPushdown(true) |
| .supportsLimitPushdown(true) |
| .supportsUnionPushdown(true) |
| .supportsJoinPushdown(true) |
| .convention(convention) |
| .build(); |
| } |
| |
| @Override |
| public DrillStoragePluginConfig getConfig() { |
| return drillConfig; |
| } |
| |
| @Override |
| public void registerSchemas(SchemaConfig schemaConfig, SchemaPlus parent) { |
| schemaFactory.registerSchemas(schemaConfig, parent); |
| } |
| |
| @Override |
| public boolean supportsRead() { |
| return true; |
| } |
| |
| @Override |
| public AbstractGroupScan getPhysicalScan(String userName, JSONOptions selection) throws IOException { |
| DrillScanSpec scanSpec = selection.getListWith(new TypeReference<DrillScanSpec>() { |
| }); |
| return new DrillGroupScan(userName, drillConfig, scanSpec); |
| } |
| |
| @Override |
| public Set<? extends RelOptRule> getOptimizerRules(OptimizerRulesContext optimizerContext, PlannerPhase phase) { |
| switch (phase) { |
| case PHYSICAL: |
| case LOGICAL: |
| return storagePluginRulesSupplier.getOptimizerRules(); |
| case LOGICAL_PRUNE_AND_JOIN: |
| case LOGICAL_PRUNE: |
| case PARTITION_PRUNING: |
| case JOIN_PLANNING: |
| default: |
| return Collections.emptySet(); |
| } |
| } |
| |
| public Convention convention() { |
| return storagePluginRulesSupplier.convention(); |
| } |
| |
| public DrillClient getClient(String userName) { |
| userClients.computeIfAbsent(userName, this::createClient); |
| // recompute drill client for the case of closed connection |
| return userClients.computeIfPresent(userName, (name, value) -> { |
| if (!value.connectionIsActive()) { |
| AutoCloseables.closeSilently(value); |
| return createClient(name); |
| } |
| return value; |
| }); |
| } |
| |
| private DrillClient createClient(String userName) { |
| return drillConfig.getDrillClient(userName, null); |
| } |
| |
| @Override |
| public void close() { |
| AutoCloseables.closeSilently(userClients.values().toArray(new AutoCloseable[0])); |
| } |
| } |