diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..5ff6309b7199129c1afe4f4ec1906e640bec48c6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,38 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store
\ No newline at end of file
diff --git a/data_types/pom.xml b/data_types/pom.xml
new file mode 100644
index 0000000000000000000000000000000000000000..49bdf9fd4de08794ccec72a087f955819ebacde8
--- /dev/null
+++ b/data_types/pom.xml
@@ -0,0 +1,60 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+ <modelVersion>4.0.0</modelVersion>
+
+ <groupId>org.example</groupId>
+ <artifactId>data_types</artifactId>
+ <version>1.0-SNAPSHOT</version>
+ <packaging>jar</packaging>
+
+ <name>hello</name>
+ <url>http://maven.apache.org</url>
+
+ <properties>
+ <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+ </properties>
+
+ <dependencies>
+ <dependency>
+ <groupId>junit</groupId>
+ <artifactId>junit</artifactId>
+ <version>3.8.1</version>
+ <scope>test</scope>
+ </dependency>
+ <dependency>
+ <groupId>redis.clients</groupId>
+ <artifactId>jedis</artifactId>
+ <version>5.1.5</version>
+ </dependency>
+ <dependency>
+ <groupId>org.slf4j</groupId>
+ <artifactId>slf4j-api</artifactId>
+ <version>2.0.16</version>
+ </dependency>
+ <dependency>
+ <groupId>org.slf4j</groupId>
+ <artifactId>slf4j-simple</artifactId>
+ <version>2.0.16</version>
+ <scope>runtime</scope>
+ </dependency>
+ <dependency>
+ <groupId>junit</groupId>
+ <artifactId>junit</artifactId>
+ <version>4.13.1</version>
+ <scope>test</scope>
+ </dependency>
+ <dependency>
+ <groupId>org.hamcrest</groupId>
+ <artifactId>hamcrest</artifactId>
+ <version>2.2</version>
+ <scope>test</scope>
+ </dependency>
+ <dependency>
+ <groupId>org.mockito</groupId>
+ <artifactId>mockito-core</artifactId>
+ <version>4.7.0</version>
+ <scope>test</scope>
+ </dependency>
+
+ </dependencies>
+</project>
diff --git a/data_types/src/test/java/org/example/JedisBasicsTest.java b/data_types/src/test/java/org/example/JedisBasicsTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..26e06503f769e8aef78a739c65f8a832b0a9f239
--- /dev/null
+++ b/data_types/src/test/java/org/example/JedisBasicsTest.java
@@ -0,0 +1,133 @@
+package org.example;
+
+import org.junit.*;
+import redis.clients.jedis.Jedis;
+import redis.clients.jedis.JedisPool;
+import redis.clients.jedis.JedisPoolConfig;
+
+import java.util.*;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+
+public class JedisBasicsTest {
+ // TODO: Replace the following with your own Redis configuration
+ final private static String host = "<your redis host>";
+ final private static Integer port = 0; // your port number
+ final private static String password = "<your password>";
+ final private static Integer timeout = 2000;
+
+ public static String[] testPlanets = { "Mercury", "Mercury", "Venus",
+ "Earth", "Earth", "Mars",
+ "Jupiter", "Saturn", "Uranus",
+ "Neptune", "Pluto" };
+
+ private JedisPoolConfig config;
+ private JedisPool pool;
+ private Jedis jedis;
+
+ @Before
+ public void setUp() {
+ this.config = new JedisPoolConfig();
+
+ this.pool = new JedisPool(config, host, port, timeout, password);
+ this.jedis = pool.getResource();
+
+ jedis.del("planets");
+ jedis.del("earth");
+ }
+
+ @After
+ public void tearDown() {
+ jedis.del("planets");
+ jedis.del("earth");
+ jedis.close();
+ }
+
+ @Test
+ public void testRedisList() {
+ assertThat(testPlanets.length, is(11));
+
+ /* Add all test planets to the Redis set */
+ Long result = null; // TODO
+ assertThat(result, is(11L));
+
+ // Check the length of the list
+ Long length = null; // TODO
+ assertThat(length, is(11L));
+
+ // Get the planets from the list
+ // Note: LRANGE is an O(n) command. Be careful running this command
+ // with high-cardinality sets.
+ List<String> planets = null; // TODO
+ assertThat(planets, is(Arrays.asList(testPlanets)));
+
+ // Remove the elements that we know are duplicates
+ // Note: O(n) operation.
+ // TODO
+
+
+ // Drop a planet from the end of the list
+ String planet = null; // TODO
+ assertThat(planet, is("Pluto"));
+
+ assertThat(jedis.llen("planets"), is(8L));
+ }
+
+ @Test
+ public void testRedisSet() {
+ assertThat(testPlanets.length, is(11));
+
+ // Add all test planets to the Redis set
+ // TODO
+
+ // Return the cardinality of the set
+ Long length = null; // TODO
+ assertThat(length, is(9L));
+
+ // Fetch all values from the set
+ // Note: SMEMBERS is an O(n) command. Be careful running this command
+ // with high-cardinality sets. Consider SSCAN as an alternative.
+ Set<String> planets = null; // TODO
+
+ // Ensure that a HashSet created and stored in Java memory and the set stored
+ // in Redis have the same values.
+ Set<String> planetSet = new HashSet<>(Arrays.asList(testPlanets));
+ assertThat(planets, is(planetSet));
+
+ // Pluto is, of course, no longer a first-class planet. Remove it.
+ Long response = null; // TODO
+ assertThat(response, is(1L));
+
+ // Now we have 8 planets, as expected.
+ Long newLength = null; // TODO
+ assertThat(newLength, is(8L));
+ }
+
+ @Test
+ public void testRedisHash() {
+ Map<String, String> earthProperties = new HashMap<>();
+ earthProperties.put("diameterKM", "12756");
+ earthProperties.put("dayLengthHrs", "24");
+ earthProperties.put("meanTempC", "15");
+ earthProperties.put("moonCount", "1");
+
+ // Set the fields of the hash one by one.
+ for (Map.Entry<String, String> property : earthProperties.entrySet()) {
+ // TODO
+ }
+
+ // Get the hash we just created back from Redis.
+ Map<String, String> storedProperties = null; // TODO
+ assertThat(storedProperties, is(earthProperties));
+
+ // Setting fields all at once is more efficient.
+ // TODO
+ storedProperties = null; // TODO
+ assertThat(storedProperties, is(earthProperties));
+
+ // Test that we can get a single property.
+ String diameter = null; // TODO
+ assertThat(diameter, is(earthProperties.get("diameterKM")));
+ }
+}
diff --git a/hello/pom.xml b/hello/pom.xml
new file mode 100644
index 0000000000000000000000000000000000000000..8c7949d7e590c5baa912cbfb5af40a05bc2a1550
--- /dev/null
+++ b/hello/pom.xml
@@ -0,0 +1,41 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+ <modelVersion>4.0.0</modelVersion>
+
+ <groupId>org.example</groupId>
+ <artifactId>hello</artifactId>
+ <version>1.0-SNAPSHOT</version>
+ <packaging>jar</packaging>
+
+ <name>hello</name>
+ <url>http://maven.apache.org</url>
+
+ <properties>
+ <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+ </properties>
+
+ <dependencies>
+ <dependency>
+ <groupId>junit</groupId>
+ <artifactId>junit</artifactId>
+ <version>3.8.1</version>
+ <scope>test</scope>
+ </dependency>
+ <dependency>
+ <groupId>redis.clients</groupId>
+ <artifactId>jedis</artifactId>
+ <version>5.1.5</version>
+ </dependency>
+ <dependency>
+ <groupId>org.slf4j</groupId>
+ <artifactId>slf4j-api</artifactId>
+ <version>2.0.16</version>
+ </dependency>
+ <dependency>
+ <groupId>org.slf4j</groupId>
+ <artifactId>slf4j-simple</artifactId>
+ <version>2.0.16</version>
+ <scope>runtime</scope>
+ </dependency>
+ </dependencies>
+</project>
diff --git a/hello/src/main/java/org/example/App.java b/hello/src/main/java/org/example/App.java
new file mode 100644
index 0000000000000000000000000000000000000000..2f1482a27a4579a9cf62e6f81d3433cee459d0e0
--- /dev/null
+++ b/hello/src/main/java/org/example/App.java
@@ -0,0 +1,24 @@
+package org.example;
+
+import redis.clients.jedis.*;
+
+public class App {
+ // TODO: Replace the following with your own Redis configuration
+ final private static String host = "<your redis host>";
+ final private static Integer port = 0; // your port number
+ final private static String password = "<your password>";
+ final private static Integer timeout = 2000;
+
+ public static void main(String[] args) {
+ JedisPoolConfig config = new JedisPoolConfig();
+
+ JedisPool pool = new JedisPool(config, host, port, timeout, password);
+ Jedis jedis = pool.getResource();
+ jedis.set("foo", "bar");
+ String value = jedis.get("foo");
+ System.out.println(value);
+ pool.close();
+ }
+}
+
+
diff --git a/hello/src/test/java/org/example/AppTest.java b/hello/src/test/java/org/example/AppTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..d5f435df0340a1f8b4f2cd9b9d6220ffd05c2d21
--- /dev/null
+++ b/hello/src/test/java/org/example/AppTest.java
@@ -0,0 +1,38 @@
+package org.example;
+
+import junit.framework.Test;
+import junit.framework.TestCase;
+import junit.framework.TestSuite;
+
+/**
+ * Unit test for simple App.
+ */
+public class AppTest
+ extends TestCase
+{
+ /**
+ * Create the test case
+ *
+ * @param testName name of the test case
+ */
+ public AppTest( String testName )
+ {
+ super( testName );
+ }
+
+ /**
+ * @return the suite of tests being tested
+ */
+ public static Test suite()
+ {
+ return new TestSuite( AppTest.class );
+ }
+
+ /**
+ * Rigourous Test :-)
+ */
+ public void testApp()
+ {
+ assertTrue( true );
+ }
+}