diff --git a/pom.xml b/pom.xml index f16861cc68..00967e2c35 100644 --- a/pom.xml +++ b/pom.xml @@ -71,6 +71,7 @@ xml lombok + redis diff --git a/redis/pom.xml b/redis/pom.xml new file mode 100644 index 0000000000..98775b7e13 --- /dev/null +++ b/redis/pom.xml @@ -0,0 +1,41 @@ + + + + 4.0.0 + com.baeldung + redis + 0.1-SNAPSHOT + + redis + http://maven.apache.org + + + + redis.clients + jedis + 2.8.1 + + + + com.github.kstyrc + embedded-redis + 0.6 + + + + junit + junit + ${junit.version} + test + + + + + UTF-8 + + + 4.12 + + diff --git a/redis/src/test/java/com/baeldung/JedisTest.java b/redis/src/test/java/com/baeldung/JedisTest.java new file mode 100644 index 0000000000..cba99a1e73 --- /dev/null +++ b/redis/src/test/java/com/baeldung/JedisTest.java @@ -0,0 +1,225 @@ +package com.baeldung; + +import java.io.IOException; +import java.time.Duration; +import java.util.HashMap; +import java.util.Map; +import java.util.Set; + +import org.junit.After; +import org.junit.AfterClass; +import org.junit.Assert; +import org.junit.BeforeClass; +import org.junit.Test; + +import redis.clients.jedis.Jedis; +import redis.clients.jedis.JedisPool; +import redis.clients.jedis.JedisPoolConfig; +import redis.clients.jedis.Pipeline; +import redis.clients.jedis.Response; +import redis.clients.jedis.Transaction; +import redis.embedded.RedisServer; + +/** + * Unit test for Redis Java library - Jedis. + */ +public class JedisTest { + + private Jedis jedis; + private static RedisServer redisServer; + + public JedisTest() { + jedis = new Jedis(); + } + + @BeforeClass + public static void setUp() throws IOException { + redisServer = new RedisServer(6379); + redisServer.start(); + } + + @AfterClass + public static void destroy() { + redisServer.stop(); + } + + @After + public void flush() { + jedis.flushAll(); + } + + @Test + public void givenAStringThenSaveItAsRedisStrings() { + String key = "key"; + String value = "value"; + + jedis.set(key, value); + String value2 = jedis.get(key); + + Assert.assertEquals(value, value2); + } + + @Test + public void givenListElementsThenSaveThemInRedisList() { + String queue = "queue#tasks"; + + String taskOne = "firstTask"; + String taskTwo = "secondTask"; + String taskThree = "thirdTask"; + + jedis.lpush(queue, taskOne, taskTwo); + + String taskReturnedOne = jedis.rpop(queue); + + jedis.lpush(queue, taskThree); + Assert.assertEquals(taskOne, taskReturnedOne); + + String taskReturnedTwo = jedis.rpop(queue); + String taskReturnedThree = jedis.rpop(queue); + + Assert.assertEquals(taskTwo, taskReturnedTwo); + Assert.assertEquals(taskThree, taskReturnedThree); + + String taskReturnedFour = jedis.rpop(queue); + Assert.assertNull(taskReturnedFour); + } + + @Test + public void givenSetElementsThenSaveThemInRedisSet() { + String countries = "countries"; + + String countryOne = "Spain"; + String countryTwo = "Ireland"; + String countryThree = "Ireland"; + + jedis.sadd(countries, countryOne); + + Set countriesSet = jedis.smembers(countries); + Assert.assertEquals(1, countriesSet.size()); + + jedis.sadd(countries, countryTwo); + countriesSet = jedis.smembers(countries); + Assert.assertEquals(2, countriesSet.size()); + + jedis.sadd(countries, countryThree); + countriesSet = jedis.smembers(countries); + Assert.assertEquals(2, countriesSet.size()); + + boolean exists = jedis.sismember(countries, countryThree); + Assert.assertTrue(exists); + } + + @Test + public void givenObjectFieldsThenSaveThemInRedisHash() { + String key = "user#1"; + + String field = "name"; + String value = "William"; + + String field2 = "job"; + String value2 = "politician"; + + jedis.hset(key, field, value); + jedis.hset(key, field2, value2); + + String value3 = jedis.hget(key, field); + Assert.assertEquals(value, value3); + + Map fields = jedis.hgetAll(key); + String value4 = fields.get(field2); + Assert.assertEquals(value2, value4); + } + + @Test + public void givenARankingThenSaveItInRedisSortedSet() { + String key = "ranking"; + + Map scores = new HashMap<>(); + + scores.put("PlayerOne", 3000.0); + scores.put("PlayerTwo", 1500.0); + scores.put("PlayerThree", 8200.0); + + for (String player : scores.keySet()) { + jedis.zadd(key, scores.get(player), player); + } + + Set players = jedis.zrevrange(key, 0, 1); + Assert.assertEquals("PlayerThree", players.iterator().next()); + + long rank = jedis.zrevrank(key, "PlayerOne"); + Assert.assertEquals(1, rank); + } + + @Test + public void givenMultipleOperationsThatNeedToBeExecutedAtomicallyThenWrapThemInATransaction() { + String friendsPrefix = "friends#"; + + String userOneId = "4352523"; + String userTwoId = "5552321"; + + Transaction t = jedis.multi(); + t.sadd(friendsPrefix + userOneId, userTwoId); + t.sadd(friendsPrefix + userTwoId, userOneId); + t.exec(); + + boolean exists = jedis.sismember(friendsPrefix + userOneId, userTwoId); + Assert.assertTrue(exists); + + exists = jedis.sismember(friendsPrefix + userTwoId, userOneId); + Assert.assertTrue(exists); + } + + @Test + public void givenMultipleIndependentOperationsWhenNetworkOptimizationIsImportantThenWrapThemInAPipeline() { + String userOneId = "4352523"; + String userTwoId = "4849888"; + + Pipeline p = jedis.pipelined(); + p.sadd("searched#" + userOneId, "paris"); + p.zadd("ranking", 126, userOneId); + p.zadd("ranking", 325, userTwoId); + Response pipeExists = p.sismember("searched#" + userOneId, "paris"); + Response> pipeRanking = p.zrange("ranking", 0, -1); + p.sync(); + + Assert.assertTrue(pipeExists.get()); + Assert.assertEquals(2, pipeRanking.get().size()); + } + + @Test + public void givenAPoolConfigurationThenCreateAJedisPool() { + final JedisPoolConfig poolConfig = buildPoolConfig(); + + try (JedisPool jedisPool = new JedisPool(poolConfig, "localhost"); + Jedis jedis = jedisPool.getResource()) { + + // do simple operation to verify that the Jedis resource is working properly + String key = "key"; + String value = "value"; + + jedis.set(key, value); + String value2 = jedis.get(key); + + Assert.assertEquals(value, value2); + + // flush Redis + jedis.flushAll(); + } + } + + private JedisPoolConfig buildPoolConfig() { + final JedisPoolConfig poolConfig = new JedisPoolConfig(); + poolConfig.setMaxTotal(128); + poolConfig.setMaxIdle(128); + poolConfig.setMinIdle(16); + poolConfig.setTestOnBorrow(true); + poolConfig.setTestOnReturn(true); + poolConfig.setTestWhileIdle(true); + poolConfig.setMinEvictableIdleTimeMillis(Duration.ofSeconds(60).toMillis()); + poolConfig.setTimeBetweenEvictionRunsMillis(Duration.ofSeconds(30).toMillis()); + poolConfig.setNumTestsPerEvictionRun(3); + poolConfig.setBlockWhenExhausted(true); + return poolConfig; + } +}