| /* |
| * 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.ignite.examples.spark; |
| |
| import org.apache.ignite.Ignite; |
| import org.apache.ignite.IgniteCache; |
| import org.apache.ignite.Ignition; |
| import org.apache.ignite.cache.query.SqlFieldsQuery; |
| import org.apache.ignite.configuration.CacheConfiguration; |
| import org.apache.ignite.spark.IgniteDataFrameSettings; |
| import org.apache.log4j.Level; |
| import org.apache.log4j.Logger; |
| import org.apache.spark.sql.Dataset; |
| import org.apache.spark.sql.Row; |
| import org.apache.spark.sql.SparkSession; |
| |
| import static org.apache.spark.sql.functions.col; |
| |
| /** |
| * |
| */ |
| public class JavaIgniteDataFrameExample { |
| /** |
| * Ignite config file. |
| */ |
| private static final String CONFIG = "examples/config/example-ignite.xml"; |
| |
| /** |
| * Test cache name. |
| */ |
| private static final String CACHE_NAME = "testCache"; |
| |
| /** @param args Command line arguments. */ |
| public static void main(String args[]) { |
| |
| setupServerAndData(); |
| |
| //Creating spark session. |
| SparkSession spark = SparkSession |
| .builder() |
| .appName("JavaIgniteDataFrameExample") |
| .master("local") |
| .config("spark.executor.instances", "2") |
| .getOrCreate(); |
| |
| // Adjust the logger to exclude the logs of no interest. |
| Logger.getRootLogger().setLevel(Level.ERROR); |
| Logger.getLogger("org.apache.ignite").setLevel(Level.INFO); |
| |
| // Executing examples. |
| |
| sparkDSLExample(spark); |
| |
| nativeSparkSqlExample(spark); |
| |
| Ignition.stop(false); |
| } |
| |
| /** */ |
| private static void sparkDSLExample(SparkSession spark) { |
| System.out.println("Querying using Spark DSL."); |
| |
| Dataset<Row> igniteDF = spark.read() |
| .format(IgniteDataFrameSettings.FORMAT_IGNITE()) //Data source type. |
| .option(IgniteDataFrameSettings.OPTION_TABLE(), "person") //Table to read. |
| .option(IgniteDataFrameSettings.OPTION_CONFIG_FILE(), CONFIG) //Ignite config. |
| .load() |
| .filter(col("id").geq(2)) //Filter clause. |
| .filter(col("name").like("%M%")); //Another filter clause. |
| |
| System.out.println("Data frame schema:"); |
| |
| igniteDF.printSchema(); //Printing query schema to console. |
| |
| System.out.println("Data frame content:"); |
| |
| igniteDF.show(); //Printing query results to console. |
| } |
| |
| /** */ |
| private static void nativeSparkSqlExample(SparkSession spark) { |
| System.out.println("Querying using Spark SQL."); |
| |
| Dataset<Row> df = spark.read() |
| .format(IgniteDataFrameSettings.FORMAT_IGNITE()) //Data source type. |
| .option(IgniteDataFrameSettings.OPTION_TABLE(), "person") //Table to read. |
| .option(IgniteDataFrameSettings.OPTION_CONFIG_FILE(), CONFIG) //Ignite config. |
| .load(); |
| |
| //Registering DataFrame as Spark view. |
| df.createOrReplaceTempView("person"); |
| |
| //Selecting data from Ignite through Spark SQL Engine. |
| Dataset<Row> igniteDF = spark.sql("SELECT * FROM person WHERE id >= 2 AND name = 'Mary Major'"); |
| |
| System.out.println("Result schema:"); |
| |
| igniteDF.printSchema(); //Printing query schema to console. |
| |
| System.out.println("Result content:"); |
| |
| igniteDF.show(); //Printing query results to console. |
| } |
| |
| /** */ |
| private static void setupServerAndData() { |
| //Starting Ignite. |
| Ignite ignite = Ignition.start(CONFIG); |
| |
| //Creating first test cache. |
| CacheConfiguration<?, ?> ccfg = new CacheConfiguration<>(CACHE_NAME).setSqlSchema("PUBLIC"); |
| |
| IgniteCache<?, ?> cache = ignite.getOrCreateCache(ccfg); |
| |
| //Creating SQL tables. |
| cache.query(new SqlFieldsQuery( |
| "CREATE TABLE city (id LONG PRIMARY KEY, name VARCHAR) WITH \"template=replicated\"")).getAll(); |
| |
| cache.query(new SqlFieldsQuery( |
| "CREATE TABLE person (id LONG, name VARCHAR, city_id LONG, PRIMARY KEY (id, city_id)) " + |
| "WITH \"backups=1, affinity_key=city_id\"")).getAll(); |
| |
| cache.query(new SqlFieldsQuery("CREATE INDEX on Person (city_id)")).getAll(); |
| |
| SqlFieldsQuery qry = new SqlFieldsQuery("INSERT INTO city (id, name) VALUES (?, ?)"); |
| |
| //Inserting some data to tables. |
| cache.query(qry.setArgs(1L, "Forest Hill")).getAll(); |
| cache.query(qry.setArgs(2L, "Denver")).getAll(); |
| cache.query(qry.setArgs(3L, "St. Petersburg")).getAll(); |
| |
| qry = new SqlFieldsQuery("INSERT INTO person (id, name, city_id) values (?, ?, ?)"); |
| |
| cache.query(qry.setArgs(1L, "John Doe", 3L)).getAll(); |
| cache.query(qry.setArgs(2L, "Jane Roe", 2L)).getAll(); |
| cache.query(qry.setArgs(3L, "Mary Major", 1L)).getAll(); |
| cache.query(qry.setArgs(4L, "Richard Miles", 2L)).getAll(); |
| } |
| } |