Support the command (redis#2920)

src/main/java/io/lettuce/core/AbstractRedisAsyncCommands.java

@@ -474,6 +474,11 @@ public RedisFuture<String> clusterMyId() {
         return dispatch(commandBuilder.clusterMyId());
     }
 
+    @Override
+    public RedisFuture<String> clusterMyShardId() {
+        return dispatch(commandBuilder.clusterMyShardId());
+    }
+
     @Override
     public RedisFuture<String> clusterNodes() {
         return dispatch(commandBuilder.clusterNodes());

src/main/java/io/lettuce/core/AbstractRedisReactiveCommands.java

@@ -496,6 +496,11 @@ public Mono<String> clusterMyId() {
         return createMono(commandBuilder::clusterMyId);
     }
 
+    @Override
+    public Mono<String> clusterMyShardId() {
+        return createMono(commandBuilder::clusterMyShardId);
+    }
+
     @Override
     public Mono<String> clusterNodes() {
         return createMono(commandBuilder::clusterNodes);

src/main/java/io/lettuce/core/RedisCommandBuilder.java

@@ -656,6 +656,12 @@ Command<K, V, String> clusterMyId() {
         return createCommand(CLUSTER, new StatusOutput<>(codec), args);
     }
 
+    Command<K, V, String> clusterMyShardId() {
+        CommandArgs<K, V> args = new CommandArgs<>(codec).add(MYSHARDID);
+
+        return createCommand(CLUSTER, new StatusOutput<>(codec), args);
+    }
+
     Command<K, V, String> clusterNodes() {
         CommandArgs<K, V> args = new CommandArgs<>(codec).add(NODES);
 

src/main/java/io/lettuce/core/cluster/api/async/RedisClusterAsyncCommands.java

@@ -217,6 +217,16 @@ public interface RedisClusterAsyncCommands<K, V> extends BaseRedisAsyncCommands<
      */
     RedisFuture<String> clusterMyId();
 
+    /**
+     * Obtain the shard ID for the currently connected node.
+     * <p>
+     * The CLUSTER MYSHARDID command returns the unique, auto-generated identifier that is associated with the shard to which
+     * the connected cluster node belongs.
+     *
+     * @return String simple-string-reply
+     */
+    RedisFuture<String> clusterMyShardId();
+
     /**
      * Obtain details about all cluster nodes. Can be parsed using
      * {@link io.lettuce.core.cluster.models.partitions.ClusterPartitionParser#parse}

src/main/java/io/lettuce/core/cluster/api/reactive/RedisClusterReactiveCommands.java

@@ -216,6 +216,16 @@ public interface RedisClusterReactiveCommands<K, V> extends BaseRedisReactiveCom
      */
     Mono<String> clusterMyId();
 
+    /**
+     * Obtain the shard ID for the currently connected node.
+     * <p>
+     * The CLUSTER MYSHARDID command returns the unique, auto-generated identifier that is associated with the shard to which
+     * the connected cluster node belongs.
+     *
+     * @return String simple-string-reply
+     */
+    Mono<String> clusterMyShardId();
+
     /**
      * Obtain details about all cluster nodes. Can be parsed using
      * {@link io.lettuce.core.cluster.models.partitions.ClusterPartitionParser#parse}

src/main/java/io/lettuce/core/cluster/api/sync/RedisClusterCommands.java

@@ -214,6 +214,16 @@ public interface RedisClusterCommands<K, V> extends BaseRedisCommands<K, V>, Red
      */
     String clusterMyId();
 
+    /**
+     * Obtain the shard ID for the currently connected node.
+     * <p>
+     * The CLUSTER MYSHARDID command returns the unique, auto-generated identifier that is associated with the shard to which
+     * the connected cluster node belongs.
+     *
+     * @return String simple-string-reply
+     */
+    String clusterMyShardId();
+
     /**
      * Obtain details about all cluster nodes. Can be parsed using
      * {@link io.lettuce.core.cluster.models.partitions.ClusterPartitionParser#parse}

src/main/java/io/lettuce/core/protocol/CommandType.java

@@ -42,7 +42,7 @@ public enum CommandType implements ProtocolKeyword {
 
     // Server
 
-    BGREWRITEAOF, BGSAVE, CLIENT, COMMAND, CONFIG, DBSIZE, DEBUG, FLUSHALL, FLUSHDB, INFO, MYID, LASTSAVE, REPLICAOF, ROLE, MONITOR, SAVE, SHUTDOWN, SLAVEOF, SLOWLOG, SYNC, MEMORY,
+    BGREWRITEAOF, BGSAVE, CLIENT, COMMAND, CONFIG, DBSIZE, DEBUG, FLUSHALL, FLUSHDB, INFO, MYID, MYSHARDID, LASTSAVE, REPLICAOF, ROLE, MONITOR, SAVE, SHUTDOWN, SLAVEOF, SLOWLOG, SYNC, MEMORY,
 
     // Keys
 

src/main/templates/io/lettuce/core/api/RedisHashCommands.java

@@ -19,9 +19,13 @@
  */
 package io.lettuce.core.api;
 
+import java.time.Duration;
+import java.time.Instant;
+import java.util.Date;
 import java.util.List;
 import java.util.Map;
 
+import io.lettuce.core.ExpireArgs;
 import io.lettuce.core.KeyScanCursor;
 import io.lettuce.core.KeyValue;
 import io.lettuce.core.MapScanCursor;

src/main/templates/io/lettuce/core/api/RedisKeyCommands.java

@@ -24,9 +24,7 @@
 import java.util.Date;
 import java.util.List;
 
-import io.lettuce.core.ExpireArgs;
-import io.lettuce.core.KeyScanArgs;
-import io.lettuce.core.RestoreArgs;
+import io.lettuce.core.*;
 import io.lettuce.core.output.KeyStreamingChannel;
 import io.lettuce.core.output.ValueStreamingChannel;
 

src/main/templates/io/lettuce/core/api/RedisStreamCommands.java

@@ -22,15 +22,9 @@
 import java.util.List;
 import java.util.Map;
 
-import io.lettuce.core.Consumer;
-import io.lettuce.core.Limit;
-import io.lettuce.core.Range;
-import io.lettuce.core.StreamMessage;
-import io.lettuce.core.XAddArgs;
-import io.lettuce.core.XGroupCreateArgs;
-import io.lettuce.core.XReadArgs;
-import io.lettuce.core.XClaimArgs;
+import io.lettuce.core.*;
 import io.lettuce.core.XReadArgs.StreamOffset;
+import io.lettuce.core.models.stream.ClaimedMessages;
 import io.lettuce.core.models.stream.PendingMessage;
 import io.lettuce.core.models.stream.PendingMessages;
 

src/test/java/io/lettuce/core/RedisCommandBuilderUnitTests.java

@@ -146,4 +146,15 @@ void shouldCorrectlyConstructHpttl() {
                         + "3\r\n" + "$7\r\n" + "hField1\r\n" + "$7\r\n" + "hField2\r\n" + "$7\r\n" + "hField3\r\n");
     }
 
+    @Test
+    void shouldCorrectlyConstructClusterMyshardid() {
+
+        Command<String, String, ?> command = sut.clusterMyShardId();
+        ByteBuf buf = Unpooled.directBuffer();
+        command.encode(buf);
+
+        assertThat(buf.toString(StandardCharsets.UTF_8))
+                .isEqualTo("*2\r\n" + "$7\r\n" + "CLUSTER\r\n" + "$9\r\n" + "MYSHARDID\r\n");
+    }
+
 }