| /* |
| * 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 java.util.List; |
| 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.SaveMode; |
| import org.apache.spark.sql.SparkSession; |
| |
| import static org.apache.ignite.internal.util.IgniteUtils.gridClassLoader; |
| import static org.apache.spark.sql.functions.col; |
| import static org.apache.spark.sql.functions.reverse; |
| |
| /** |
| * |
| */ |
| public class JavaIgniteDataFrameWriteExample { |
| /** |
| * Ignite config file. |
| */ |
| private static final String CONFIG = "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[]) { |
| //Starting Ignite. |
| Ignite ignite = Ignition.start(CONFIG); |
| |
| //Starting Ignite server node. |
| setupServerAndData(ignite); |
| |
| //Creating spark session. |
| SparkSession spark = SparkSession |
| .builder() |
| .appName("Spark Ignite data sources write example") |
| .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. |
| System.out.println("Example of writing json file to Ignite:"); |
| |
| writeJSonToIgnite(ignite, spark); |
| |
| System.out.println("Example of modifying existing Ignite table data through Data Fram API:"); |
| |
| editDataAndSaveToNewTable(ignite, spark); |
| |
| Ignition.stop(false); |
| } |
| |
| /** */ |
| private static void writeJSonToIgnite(Ignite ignite, SparkSession spark) { |
| //Load content of json file to data frame. |
| Dataset<Row> personsDataFrame = spark.read().json( |
| gridClassLoader().getResource("person.json").getFile()); |
| |
| System.out.println("Json file content:"); |
| |
| //Printing content of json file to console. |
| personsDataFrame.show(); |
| |
| System.out.println("Writing Data Frame to Ignite:"); |
| |
| //Writing content of data frame to Ignite. |
| personsDataFrame.write() |
| .format(IgniteDataFrameSettings.FORMAT_IGNITE()) |
| .option(IgniteDataFrameSettings.OPTION_CONFIG_FILE(), CONFIG) |
| .option(IgniteDataFrameSettings.OPTION_TABLE(), "json_person") |
| .option(IgniteDataFrameSettings.OPTION_CREATE_TABLE_PRIMARY_KEY_FIELDS(), "id") |
| .option(IgniteDataFrameSettings.OPTION_CREATE_TABLE_PARAMETERS(), "template=replicated") |
| .save(); |
| |
| System.out.println("Done!"); |
| |
| System.out.println("Reading data from Ignite table:"); |
| |
| CacheConfiguration<?, ?> ccfg = new CacheConfiguration<>(CACHE_NAME); |
| |
| IgniteCache<?, ?> cache = ignite.getOrCreateCache(ccfg); |
| |
| //Reading saved data from Ignite. |
| List<List<?>> data = cache.query(new SqlFieldsQuery("SELECT id, name, department FROM json_person")).getAll(); |
| |
| System.out.println(data); |
| } |
| |
| /** */ |
| private static void editDataAndSaveToNewTable(Ignite ignite, SparkSession spark) { |
| //Load content of Ignite table to data frame. |
| Dataset<Row> personDataFrame = spark.read() |
| .format(IgniteDataFrameSettings.FORMAT_IGNITE()) |
| .option(IgniteDataFrameSettings.OPTION_CONFIG_FILE(), CONFIG) |
| .option(IgniteDataFrameSettings.OPTION_TABLE(), "person") |
| .load(); |
| |
| System.out.println("Data frame content:"); |
| |
| //Printing content of data frame to console. |
| personDataFrame.show(); |
| |
| System.out.println("Modifying Data Frame and write it to Ignite:"); |
| |
| personDataFrame |
| .withColumn("id", col("id").plus(42)) //Edit id column |
| .withColumn("name", reverse(col("name"))) //Edit name column |
| .write().format(IgniteDataFrameSettings.FORMAT_IGNITE()) |
| .option(IgniteDataFrameSettings.OPTION_CONFIG_FILE(), CONFIG) |
| .option(IgniteDataFrameSettings.OPTION_TABLE(), "new_persons") |
| .option(IgniteDataFrameSettings.OPTION_CREATE_TABLE_PRIMARY_KEY_FIELDS(), "id, city_id") |
| .option(IgniteDataFrameSettings.OPTION_CREATE_TABLE_PARAMETERS(), "backups=1") |
| .mode(SaveMode.Overwrite) //Overwriting entire table. |
| .save(); |
| |
| System.out.println("Done!"); |
| |
| System.out.println("Reading data from Ignite table:"); |
| |
| CacheConfiguration<?, ?> ccfg = new CacheConfiguration<>(CACHE_NAME); |
| |
| IgniteCache<?, ?> cache = ignite.getOrCreateCache(ccfg); |
| |
| //Reading saved data from Ignite. |
| List<List<?>> data = cache.query(new SqlFieldsQuery("SELECT id, name, city_id FROM new_persons")).getAll(); |
| |
| System.out.println(data); |
| } |
| |
| /** */ |
| private static void setupServerAndData(Ignite ignite) { |
| //Creating first test cache. |
| CacheConfiguration<?, ?> ccfg = new CacheConfiguration<>(CACHE_NAME).setSqlSchema("PUBLIC"); |
| |
| IgniteCache<?, ?> cache = ignite.getOrCreateCache(ccfg); |
| |
| //Creating SQL table. |
| cache.query(new SqlFieldsQuery( |
| "CREATE TABLE person (id LONG, name VARCHAR, city_id LONG, PRIMARY KEY (id)) " + |
| "WITH \"backups=1\"")).getAll(); |
| |
| cache.query(new SqlFieldsQuery("CREATE INDEX on Person (city_id)")).getAll(); |
| |
| //Inserting some data to tables. |
| SqlFieldsQuery 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(); |
| } |
| } |