Implement Challenge redislabs-training#1

Author: matejkec

src/main/java/com/redislabs/university/RU102J/dao/SiteDaoRedisImpl.java

@@ -4,7 +4,10 @@
 import redis.clients.jedis.Jedis;
 import redis.clients.jedis.JedisPool;
 
-import java.util.*;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
 
 public class SiteDaoRedisImpl implements SiteDao {
     private final JedisPool jedisPool;
@@ -41,8 +44,18 @@ public Site findById(long id) {
     // Challenge #1
     @Override
     public Set<Site> findAll() {
-        // START Challenge #1
-        return Collections.emptySet();
-        // END Challenge #1
+        try(Jedis jedis = jedisPool.getResource()) {
+            String key = RedisSchema.getSiteIDsKey();
+            Set<String> siteHashKeys = jedis.smembers(key);
+
+            Set<Site> sites = new HashSet<>();
+            for (String siteHashKey : siteHashKeys) {
+                Map<String, String> fields = jedis.hgetAll(siteHashKey);
+                if(fields != null && !fields.isEmpty()) {
+                    sites.add(new Site(fields));
+                }
+            }
+            return sites;
+        }
     }
 }

src/test/java/com/redislabs/university/RU102J/dao/SiteDaoRedisImplTest.java

@@ -2,23 +2,18 @@
 
 import com.redislabs.university.RU102J.HostPort;
 import com.redislabs.university.RU102J.TestKeyManager;
-import com.redislabs.university.RU102J.api.MeterReading;
 import com.redislabs.university.RU102J.api.Site;
 import org.junit.*;
 import redis.clients.jedis.Jedis;
 import redis.clients.jedis.JedisPool;
 import redis.clients.jedis.JedisPoolConfig;
 
-import java.time.ZoneOffset;
-import java.time.ZonedDateTime;
 import java.util.HashSet;
 import java.util.Map;
 import java.util.Set;
 
 import static org.hamcrest.MatcherAssert.assertThat;
-import static org.hamcrest.Matchers.is;
-import static org.hamcrest.Matchers.nullValue;
-import static org.hamcrest.Matchers.empty;
+import static org.hamcrest.Matchers.*;
 import static org.junit.Assert.assertEquals;
 
 public class SiteDaoRedisImplTest {
@@ -97,7 +92,6 @@ public void findByIdWithMissingSite() {
      * Challenge #1 Part 1. Use this test case to
      * implement the challenge in Chapter 1.
      */
-    @Ignore
     @Test
     public void findAllWithMultipleSites() {
         SiteDaoRedisImpl dao = new SiteDaoRedisImpl(jedisPool);
@@ -113,7 +107,6 @@ public void findAllWithMultipleSites() {
      * Challenge #1 Part 2. Use this test case to
      * implement the challenge in Chapter 1.
      */
-    @Ignore
     @Test
     public void findAllWithEmptySites() {
         SiteDaoRedisImpl dao = new SiteDaoRedisImpl(jedisPool);