| /* |
| * 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.mongo; |
| |
| import com.fasterxml.jackson.core.type.TypeReference; |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.mongodb.MongoClient; |
| import com.mongodb.MongoClientURI; |
| import com.mongodb.MongoCredential; |
| import com.mongodb.ServerAddress; |
| import org.apache.calcite.schema.SchemaPlus; |
| import org.apache.drill.common.JSONOptions; |
| import org.apache.drill.common.exceptions.ExecutionSetupException; |
| import org.apache.drill.exec.ops.OptimizerRulesContext; |
| import org.apache.drill.exec.physical.base.AbstractGroupScan; |
| import org.apache.drill.exec.server.DrillbitContext; |
| import org.apache.drill.exec.store.AbstractStoragePlugin; |
| import org.apache.drill.exec.store.SchemaConfig; |
| import org.apache.drill.exec.store.StoragePluginOptimizerRule; |
| import org.apache.drill.exec.store.mongo.schema.MongoSchemaFactory; |
| import org.apache.drill.shaded.guava.com.google.common.cache.Cache; |
| import org.apache.drill.shaded.guava.com.google.common.cache.CacheBuilder; |
| import org.apache.drill.shaded.guava.com.google.common.cache.RemovalListener; |
| import org.apache.drill.shaded.guava.com.google.common.cache.RemovalNotification; |
| import org.apache.drill.shaded.guava.com.google.common.collect.ImmutableSet; |
| import org.apache.drill.shaded.guava.com.google.common.collect.Lists; |
| import org.apache.hadoop.conf.Configuration; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.net.URLEncoder; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.concurrent.TimeUnit; |
| |
| public class MongoStoragePlugin extends AbstractStoragePlugin { |
| private static final Logger logger = LoggerFactory.getLogger(MongoStoragePlugin.class); |
| |
| private final MongoStoragePluginConfig mongoConfig; |
| private final MongoSchemaFactory schemaFactory; |
| private final Cache<MongoCnxnKey, MongoClient> addressClientMap; |
| private final MongoClientURI clientURI; |
| |
| public MongoStoragePlugin( |
| MongoStoragePluginConfig mongoConfig, |
| DrillbitContext context, |
| String name) throws ExecutionSetupException { |
| super(context, name); |
| this.mongoConfig = mongoConfig; |
| String connection = addCredentialsFromCredentialsProvider(this.mongoConfig.getConnection(), name); |
| this.clientURI = new MongoClientURI(connection); |
| this.addressClientMap = CacheBuilder.newBuilder() |
| .expireAfterAccess(24, TimeUnit.HOURS) |
| .removalListener(new AddressCloser()).build(); |
| this.schemaFactory = new MongoSchemaFactory(this, name); |
| } |
| |
| private static String addCredentialsFromCredentialsProvider(String connection, String name) { |
| MongoClientURI parsed = new MongoClientURI(connection); |
| if (parsed.getCredentials() == null) { |
| Configuration configuration = new Configuration(); |
| try { |
| // The default connection has the name "mongo" but multiple connections can be added; |
| // each will need their own credentials. |
| char[] usernameChars = configuration.getPassword( |
| DrillMongoConstants.STORE_CONFIG_PREFIX + name + DrillMongoConstants.USERNAME_CONFIG_SUFFIX); |
| char[] passwordChars = configuration.getPassword( |
| DrillMongoConstants.STORE_CONFIG_PREFIX + name + DrillMongoConstants.PASSWORD_CONFIG_SUFFIX); |
| if (usernameChars != null && passwordChars != null) { |
| String username = URLEncoder.encode(new String(usernameChars), "UTF-8"); |
| String password = URLEncoder.encode(new String(passwordChars), "UTF-8"); |
| return connection.replaceFirst("://", |
| String.format("://%s:%s@", username, password)); |
| } |
| } catch (IOException e) { |
| logger.error("Error fetching mongodb username and password from configuration", e); |
| } |
| } |
| return connection; |
| } |
| |
| @Override |
| public MongoStoragePluginConfig getConfig() { |
| return mongoConfig; |
| } |
| |
| @Override |
| public void registerSchemas(SchemaConfig schemaConfig, SchemaPlus parent) throws IOException { |
| schemaFactory.registerSchemas(schemaConfig, parent); |
| } |
| |
| @Override |
| public boolean supportsRead() { |
| return true; |
| } |
| |
| @Override |
| public AbstractGroupScan getPhysicalScan(String userName, JSONOptions selection) throws IOException { |
| MongoScanSpec mongoScanSpec = selection.getListWith(new ObjectMapper(), new TypeReference<MongoScanSpec>() { |
| }); |
| return new MongoGroupScan(userName, this, mongoScanSpec, null); |
| } |
| |
| @Override |
| public Set<StoragePluginOptimizerRule> getPhysicalOptimizerRules(OptimizerRulesContext optimizerRulesContext) { |
| return ImmutableSet.of(MongoPushDownFilterForScan.INSTANCE); |
| } |
| |
| |
| private static class AddressCloser implements |
| RemovalListener<MongoCnxnKey, MongoClient> { |
| @Override |
| public synchronized void onRemoval( |
| RemovalNotification<MongoCnxnKey, MongoClient> removal) { |
| removal.getValue().close(); |
| logger.debug("Closed connection to {}.", removal.getKey().toString()); |
| } |
| } |
| |
| public MongoClient getClient(String host) { |
| return getClient(Collections.singletonList(new ServerAddress(host))); |
| } |
| |
| public MongoClient getClient() { |
| List<String> hosts = clientURI.getHosts(); |
| List<ServerAddress> addresses = Lists.newArrayList(); |
| for (String host : hosts) { |
| addresses.add(new ServerAddress(host)); |
| } |
| return getClient(addresses); |
| } |
| |
| public synchronized MongoClient getClient(List<ServerAddress> addresses) { |
| // Take the first replica from the replicated servers |
| final ServerAddress serverAddress = addresses.get(0); |
| final MongoCredential credential = clientURI.getCredentials(); |
| String userName = credential == null ? null : credential.getUserName(); |
| MongoCnxnKey key = new MongoCnxnKey(serverAddress, userName); |
| MongoClient client = addressClientMap.getIfPresent(key); |
| if (client == null) { |
| if (credential != null) { |
| client = new MongoClient(addresses, credential, clientURI.getOptions()); |
| } else { |
| client = new MongoClient(addresses, clientURI.getOptions()); |
| } |
| addressClientMap.put(key, client); |
| logger.debug("Created connection to {}.", key.toString()); |
| logger.debug("Number of open connections {}.", addressClientMap.size()); |
| } |
| return client; |
| } |
| |
| @Override |
| public void close() { |
| addressClientMap.invalidateAll(); |
| } |
| |
| } |