Java: Add HSCAN command

glide-core/src/protobuf/redis_request.proto

@@ -240,6 +240,7 @@ enum RequestType {
     XGroupSetId = 199;
     SScan = 200;
     ZScan = 201;
+    HScan = 202;
 }
 
 message Command {

glide-core/src/request_type.rs

@@ -210,6 +210,7 @@ pub enum RequestType {
     XGroupSetId = 199,
     SScan = 200,
     ZScan = 201,
+    HScan = 202,
 }
 
 fn get_two_word_command(first: &str, second: &str) -> Cmd {
@@ -423,6 +424,7 @@ impl From<::protobuf::EnumOrUnknown<ProtobufRequestType>> for RequestType {
             ProtobufRequestType::XGroupSetId => RequestType::XGroupSetId,
             ProtobufRequestType::SScan => RequestType::SScan,
             ProtobufRequestType::ZScan => RequestType::ZScan,
+            ProtobufRequestType::HScan => RequestType::HScan,
         }
     }
 }
@@ -634,6 +636,7 @@ impl RequestType {
             RequestType::XGroupSetId => Some(get_two_word_command("XGROUP", "SETID")),
             RequestType::SScan => Some(cmd("SSCAN")),
             RequestType::ZScan => Some(cmd("ZSCAN")),
+            RequestType::HScan => Some(cmd("HSCAN")),
         }
     }
 }

java/client/src/main/java/glide/api/BaseClient.java

@@ -61,6 +61,7 @@
 import static redis_request.RedisRequestOuterClass.RequestType.HLen;
 import static redis_request.RedisRequestOuterClass.RequestType.HMGet;
 import static redis_request.RedisRequestOuterClass.RequestType.HRandField;
+import static redis_request.RedisRequestOuterClass.RequestType.HScan;
 import static redis_request.RedisRequestOuterClass.RequestType.HSet;
 import static redis_request.RedisRequestOuterClass.RequestType.HSetNX;
 import static redis_request.RedisRequestOuterClass.RequestType.HStrlen;
@@ -215,6 +216,7 @@
 import glide.api.models.commands.geospatial.GeoSearchStoreOptions;
 import glide.api.models.commands.geospatial.GeoUnit;
 import glide.api.models.commands.geospatial.GeospatialData;
+import glide.api.models.commands.scan.HScanOptions;
 import glide.api.models.commands.scan.SScanOptions;
 import glide.api.models.commands.scan.ZScanOptions;
 import glide.api.models.commands.stream.StreamAddOptions;
@@ -2935,4 +2937,17 @@ public CompletableFuture<Object[]> zscan(
         String[] arguments = concatenateArrays(new String[] {key, cursor}, zScanOptions.toArgs());
         return commandManager.submitNewCommand(ZScan, arguments, this::handleArrayResponse);
     }
+
+    @Override
+    public CompletableFuture<Object[]> hscan(@NonNull String key, @NonNull String cursor) {
+        String[] arguments = new String[] {key, cursor};
+        return commandManager.submitNewCommand(HScan, arguments, this::handleArrayResponse);
+    }
+
+    @Override
+    public CompletableFuture<Object[]> hscan(
+            @NonNull String key, @NonNull String cursor, @NonNull HScanOptions hScanOptions) {
+        String[] arguments = concatenateArrays(new String[] {key, cursor}, hScanOptions.toArgs());
+        return commandManager.submitNewCommand(HScan, arguments, this::handleArrayResponse);
+    }
 }

java/client/src/main/java/glide/api/commands/HashBaseCommands.java

@@ -2,6 +2,7 @@
 package glide.api.commands;
 
 import glide.api.models.GlideString;
+import glide.api.models.commands.scan.HScanOptions;
 import java.util.Map;
 import java.util.concurrent.CompletableFuture;
 
@@ -432,4 +433,75 @@ public interface HashBaseCommands {
      * }</pre>
      */
     CompletableFuture<String[][]> hrandfieldWithCountWithValues(String key, long count);
+
+    /**
+     * Iterates fields of Hash types and their associated values.
+     *
+     * @see <a href="https://valkey.io/commands/hscan">valkey.io</a> for details.
+     * @param key The key of the hash.
+     * @param cursor The cursor that points to the next iteration of results. A value of <code>"0"
+     *     </code> indicates the start of the search.
+     * @return An <code>Array</code> of <code>Objects</code>. The first element is always the <code>
+     *     cursor</code> for the next iteration of results. <code>"0"</code> will be the <code>cursor
+     *     </code> returned on the last iteration of the result. The second element is always an
+     *     <code>Array</code> of the subset of the hash held in <code>key</code>. The array in the
+     *     second element is always a flattened series of <code>String</code> pairs, where the key is
+     *     at even indices and the value is at odd indices.
+     * @example
+     *     <pre>{@code
+     * // Assume key contains a set with 200 member-score pairs
+     * String cursor = "0";
+     * Object[] result;
+     * do {
+     *   result = client.hscan(key1, cursor).get();
+     *   cursor = result[0].toString();
+     *   Object[] stringResults = (Object[]) result[1];
+     *
+     *   System.out.println("\nHSCAN iteration:");
+     *   for (int i = 0; i < stringResults.length; i += 2) {
+     *     System.out.printf("{%s=%s}", stringResults[i], stringResults[i + 1]);
+     *     if (i + 2 < stringResults.length) {
+     *       System.out.print(", ");
+     *     }
+     *   }
+     * } while (!cursor.equals("0"));
+     * }</pre>
+     */
+    CompletableFuture<Object[]> hscan(String key, String cursor);
+
+    /**
+     * Iterates fields of Hash types and their associated values.
+     *
+     * @see <a href="https://valkey.io/commands/hscan">valkey.io</a> for details.
+     * @param key The key of the hash.
+     * @param cursor The cursor that points to the next iteration of results. A value of <code>"0"
+     *     </code> indicates the start of the search.
+     * @param hScanOptions The {@link HScanOptions}.
+     * @return An <code>Array</code> of <code>Objects</code>. The first element is always the <code>
+     *     cursor</code> for the next iteration of results. <code>"0"</code> will be the <code>cursor
+     *     </code> returned on the last iteration of the result. The second element is always an
+     *     <code>Array</code> of the subset of the hash held in <code>key</code>. The array in the
+     *     second element is always a flattened series of <code>String</code> pairs, where the key is
+     *     at even indices and the value is at odd indices.
+     * @example
+     *     <pre>{@code
+     * // Assume key contains a set with 200 member-score pairs
+     * String cursor = "0";
+     * Object[] result;
+     * do {
+     *   result = client.hscan(key1, cursor, HScanOptions.builder().matchPattern("*").count(20L).build()).get();
+     *   cursor = result[0].toString();
+     *   Object[] stringResults = (Object[]) result[1];
+     *
+     *   System.out.println("\nHSCAN iteration:");
+     *   for (int i = 0; i < stringResults.length; i += 2) {
+     *     System.out.printf("{%s=%s}", stringResults[i], stringResults[i + 1]);
+     *     if (i + 2 < stringResults.length) {
+     *       System.out.print(", ");
+     *     }
+     *   }
+     * } while (!cursor.equals("0"));
+     * }</pre>
+     */
+    CompletableFuture<Object[]> hscan(String key, String cursor, HScanOptions hScanOptions);
 }

java/client/src/main/java/glide/api/commands/SetBaseCommands.java

@@ -560,10 +560,10 @@ public interface SetBaseCommands {
      *
      * @see <a href="https://valkey.io/commands/sscan">valkey.io</a> for details.
      * @param key The key of the set.
-     * @param cursor The cursor that points to the next iteration of results. A value of 0 indicates
-     *     the start of the search.
+     * @param cursor The cursor that points to the next iteration of results. A value of <code>"0"
+     *     </code> indicates the start of the search.
      * @return An <code>Array</code> of <code>Objects</code>. The first element is always the <code>
-     *     cursor</code> for the next iteration of results. <code>0</code> will be the <code>cursor
+     *     cursor</code> for the next iteration of results. <code>"0"</code> will be the <code>cursor
      *     </code> returned on the last iteration of the set. The second element is always an <code>
      *     Array</code> of the subset of the set held in <code>key</code>.
      * @example
@@ -588,11 +588,11 @@ public interface SetBaseCommands {
      *
      * @see <a href="https://valkey.io/commands/sscan">valkey.io</a> for details.
      * @param key The key of the set.
-     * @param cursor The cursor that points to the next iteration of results. A value of 0 indicates
-     *     the start of the search.
+     * @param cursor The cursor that points to the next iteration of results. A value of <code>"0"
+     *     </code> indicates the start of the search.
      * @param sScanOptions The {@link SScanOptions}.
      * @return An <code>Array</code> of <code>Objects</code>. The first element is always the <code>
-     *     cursor</code> for the next iteration of results. <code>0</code> will be the <code>cursor
+     *     cursor</code> for the next iteration of results. <code>"0"</code> will be the <code>cursor
      *     </code> returned on the last iteration of the set. The second element is always an <code>
      *     Array</code> of the subset of the set held in <code>key</code>.
      * @example

java/client/src/main/java/glide/api/commands/SortedSetBaseCommands.java

@@ -1584,10 +1584,10 @@ CompletableFuture<Map<String, Double>> zinterWithScores(
      *
      * @see <a href="https://valkey.io/commands/zscan">valkey.io</a> for details.
      * @param key The key of the sorted set.
-     * @param cursor The cursor that points to the next iteration of results. A value of 0 indicates
-     *     the start of the search.
+     * @param cursor The cursor that points to the next iteration of results. A value of <code>"0"
+     *     </code> indicates the start of the search.
      * @return An <code>Array</code> of <code>Objects</code>. The first element is always the <code>
-     *     cursor</code> for the next iteration of results. <code>0</code> will be the <code>cursor
+     *     cursor</code> for the next iteration of results. <code>"0"</code> will be the <code>cursor
      *     </code> returned on the last iteration of the sorted set. The second element is always an
      *     <code>
      *     Array</code> of the subset of the sorted set held in <code>key</code>. The array in the
@@ -1620,11 +1620,11 @@ CompletableFuture<Map<String, Double>> zinterWithScores(
      *
      * @see <a href="https://valkey.io/commands/zscan">valkey.io</a> for details.
      * @param key The key of the sorted set.
-     * @param cursor The cursor that points to the next iteration of results. A value of 0 indicates
-     *     the start of the search.
+     * @param cursor The cursor that points to the next iteration of results. A value of <code>"0"
+     *     </code> indicates the start of the search.
      * @param zScanOptions The {@link ZScanOptions}.
      * @return An <code>Array</code> of <code>Objects</code>. The first element is always the <code>
-     *     cursor</code> for the next iteration of results. <code>0</code> will be the <code>cursor
+     *     cursor</code> for the next iteration of results. <code>"0"</code> will be the <code>cursor
      *     </code> returned on the last iteration of the sorted set. The second element is always an
      *     <code>
      *     Array</code> of the subset of the sorted set held in <code>key</code>. The array in the

java/client/src/main/java/glide/api/models/BaseTransaction.java

@@ -84,6 +84,7 @@
 import static redis_request.RedisRequestOuterClass.RequestType.HLen;
 import static redis_request.RedisRequestOuterClass.RequestType.HMGet;
 import static redis_request.RedisRequestOuterClass.RequestType.HRandField;
+import static redis_request.RedisRequestOuterClass.RequestType.HScan;
 import static redis_request.RedisRequestOuterClass.RequestType.HSet;
 import static redis_request.RedisRequestOuterClass.RequestType.HSetNX;
 import static redis_request.RedisRequestOuterClass.RequestType.HStrlen;
@@ -249,6 +250,7 @@
 import glide.api.models.commands.geospatial.GeoSearchStoreOptions;
 import glide.api.models.commands.geospatial.GeoUnit;
 import glide.api.models.commands.geospatial.GeospatialData;
+import glide.api.models.commands.scan.HScanOptions;
 import glide.api.models.commands.scan.SScanOptions;
 import glide.api.models.commands.scan.ZScanOptions;
 import glide.api.models.commands.stream.StreamAddOptions;
@@ -5509,10 +5511,10 @@ public T geosearchstore(
      *
      * @see <a href="https://valkey.io/commands/sscan">valkey.io</a> for details.
      * @param key The key of the set.
-     * @param cursor The cursor that points to the next iteration of results. A value of 0 indicates
-     *     the start of the search.
+     * @param cursor The cursor that points to the next iteration of results. A value of <code>"0"
+     *     </code> indicates the start of the search.
      * @return Command Response - An <code>Array</code> of <code>Objects</code>. The first element is
-     *     always the <code>cursor</code> for the next iteration of results. <code>0</code> will be
+     *     always the <code>cursor</code> for the next iteration of results. <code>"0"</code> will be
      *     the <code>cursor</code> returned on the last iteration of the set. The second element is
      *     always an <code>Array</code> of the subset of the set held in <code>key</code>.
      */
@@ -5526,11 +5528,11 @@ public T sscan(@NonNull String key, @NonNull String cursor) {
      *
      * @see <a href="https://valkey.io/commands/sscan">valkey.io</a> for details.
      * @param key The key of the set.
-     * @param cursor The cursor that points to the next iteration of results. A value of 0 indicates
-     *     the start of the search.
+     * @param cursor The cursor that points to the next iteration of results. A value of <code>"0"
+     *     </code> indicates the start of the search.
      * @param sScanOptions The {@link SScanOptions}.
      * @return Command Response - An <code>Array</code> of <code>Objects</code>. The first element is
-     *     always the <code>cursor</code> for the next iteration of results. <code>0</code> will be
+     *     always the <code>cursor</code> for the next iteration of results. <code>"0"</code> will be
      *     the <code>cursor</code> returned on the last iteration of the set. The second element is
      *     always an <code>Array</code> of the subset of the set held in <code>key</code>.
      */
@@ -5546,10 +5548,10 @@ public T sscan(@NonNull String key, @NonNull String cursor, @NonNull SScanOption
      *
      * @see <a href="https://valkey.io/commands/zscan">valkey.io</a> for details.
      * @param key The key of the sorted set.
-     * @param cursor The cursor that points to the next iteration of results. A value of 0 indicates
-     *     the start of the search.
+     * @param cursor The cursor that points to the next iteration of results. A value of <code>"0"
+     *     </code> indicates the start of the search.
      * @return Command Response - An <code>Array</code> of <code>Objects</code>. The first element is
-     *     always the <code>cursor</code> for the next iteration of results. <code>0</code> will be
+     *     always the <code>cursor</code> for the next iteration of results. <code>"0"</code> will be
      *     the <code>cursor</code> returned on the last iteration of the sorted set. The second
      *     element is always an <code>Array</code> of the subset of the sorted set held in <code>key
      *     </code>. The array in the second element is always a flattened series of <code>String
@@ -5565,11 +5567,11 @@ public T zscan(@NonNull String key, @NonNull String cursor) {
      *
      * @see <a href="https://valkey.io/commands/zscan">valkey.io</a> for details.
      * @param key The key of the sorted set.
-     * @param cursor The cursor that points to the next iteration of results. A value of 0 indicates
-     *     the start of the search.
+     * @param cursor The cursor that points to the next iteration of results. A value of <code>"0"
+     *     </code> indicates the start of the search.
      * @param zScanOptions The {@link ZScanOptions}.
      * @return Command Response - An <code>Array</code> of <code>Objects</code>. The first element is
-     *     always the <code>cursor</code> for the next iteration of results. <code>0</code> will be
+     *     always the <code>cursor</code> for the next iteration of results. <code>"0"</code> will be
      *     the <code>cursor</code> returned on the last iteration of the sorted set. The second
      *     element is always an <code>Array</code> of the subset of the sorted set held in <code>key
      *     </code>. The array in the second element is always a flattened series of <code>String
@@ -5582,6 +5584,47 @@ public T zscan(@NonNull String key, @NonNull String cursor, @NonNull ZScanOption
         return getThis();
     }
 
+    /**
+     * Iterates fields of Hash types and their associated values.
+     *
+     * @see <a href="https://valkey.io/commands/hscan">valkey.io</a> for details.
+     * @param key The key of the hash.
+     * @param cursor The cursor that points to the next iteration of results. A value of <code>"0"
+     *     </code> indicates the start of the search.
+     * @return Command Response - An <code>Array</code> of <code>Objects</code>. The first element is
+     *     always the <code>cursor</code> for the next iteration of results. <code>"0"</code> will be
+     *     the <code>cursor</code> returned on the last iteration of the result. The second element is
+     *     always an <code>Array</code> of the subset of the hash held in <code>key</code>. The array
+     *     in the second element is always a flattened series of <code>String</code> pairs, where the
+     *     key is at even indices and the value is at odd indices.
+     */
+    public T hscan(@NonNull String key, @NonNull String cursor) {
+        protobufTransaction.addCommands(buildCommand(HScan, buildArgs(key, cursor)));
+        return getThis();
+    }
+
+    /**
+     * Iterates fields of Hash types and their associated values.
+     *
+     * @see <a href="https://valkey.io/commands/hscan">valkey.io</a> for details.
+     * @param key The key of the hash.
+     * @param cursor The cursor that points to the next iteration of results. A value of <code>"0"
+     *     </code> indicates the start of the search.
+     * @param hScanOptions The {@link HScanOptions}.
+     * @return Command Response - An <code>Array</code> of <code>Objects</code>. The first element is
+     *     always the <code>cursor</code> for the next iteration of results. <code>"0"</code> will be
+     *     the <code>cursor</code> returned on the last iteration of the result. The second element is
+     *     always an <code>Array</code> of the subset of the hash held in <code>key</code>. The array
+     *     in the second element is always a flattened series of <code>String</code> pairs, where the
+     *     key is at even indices and the value is at odd indices.
+     */
+    public T hscan(@NonNull String key, @NonNull String cursor, @NonNull HScanOptions hScanOptions) {
+        final ArgsArray commandArgs =
+                buildArgs(concatenateArrays(new String[] {key, cursor}, hScanOptions.toArgs()));
+        protobufTransaction.addCommands(buildCommand(HScan, commandArgs));
+        return getThis();
+    }
+
     /** Build protobuf {@link Command} object for given command and arguments. */
     protected Command buildCommand(RequestType requestType) {
         return buildCommand(requestType, buildArgs());

java/client/src/main/java/glide/api/models/commands/scan/HScanOptions.java

@@ -0,0 +1,13 @@
+/** Copyright Valkey GLIDE Project Contributors - SPDX Identifier: Apache-2.0 */
+package glide.api.models.commands.scan;
+
+import glide.api.commands.HashBaseCommands;
+import lombok.experimental.SuperBuilder;
+
+/**
+ * Optional arguments for {@link HashBaseCommands#hscan(String, String, HScanOptions)}.
+ *
+ * @see <a href="https://valkey.io/commands/hscan/">valkey.io</a>
+ */
+@SuperBuilder
+public class HScanOptions extends BaseScanOptions {}

java/client/src/main/java/module-info.java

@@ -6,10 +6,10 @@
     exports glide.api.models.commands.bitmap;
     exports glide.api.models.commands.geospatial;
     exports glide.api.models.commands.function;
+    exports glide.api.models.commands.scan;
     exports glide.api.models.commands.stream;
     exports glide.api.models.configuration;
     exports glide.api.models.exceptions;
-    exports glide.api.models.commands.scan;
 
     requires com.google.protobuf;
     requires io.netty.codec;