Java: Add ZSCAN command

glide-core/src/protobuf/redis_request.proto

@@ -238,6 +238,7 @@ enum RequestType {
     FunctionRestore = 197;
     XPending = 198;
     SScan = 199;
+    ZScan = 200;
 }
 
 message Command {

glide-core/src/request_type.rs

@@ -208,6 +208,7 @@ pub enum RequestType {
     FunctionRestore = 197,
     XPending = 198,
     SScan = 199,
+    ZScan = 200,
 }
 
 fn get_two_word_command(first: &str, second: &str) -> Cmd {
@@ -419,6 +420,7 @@ impl From<::protobuf::EnumOrUnknown<ProtobufRequestType>> for RequestType {
             ProtobufRequestType::FunctionRestore => RequestType::FunctionRestore,
             ProtobufRequestType::XPending => RequestType::XPending,
             ProtobufRequestType::SScan => RequestType::SScan,
+            ProtobufRequestType::ZScan => RequestType::ZScan,
         }
     }
 }
@@ -628,6 +630,7 @@ impl RequestType {
             RequestType::FunctionRestore => Some(get_two_word_command("FUNCTION", "RESTORE")),
             RequestType::XPending => Some(cmd("XPENDING")),
             RequestType::SScan => Some(cmd("SSCAN")),
+            RequestType::ZScan => Some(cmd("ZSCAN")),
         }
     }
 }

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

@@ -167,6 +167,7 @@
 import static redis_request.RedisRequestOuterClass.RequestType.ZRemRangeByRank;
 import static redis_request.RedisRequestOuterClass.RequestType.ZRemRangeByScore;
 import static redis_request.RedisRequestOuterClass.RequestType.ZRevRank;
+import static redis_request.RedisRequestOuterClass.RequestType.ZScan;
 import static redis_request.RedisRequestOuterClass.RequestType.ZScore;
 import static redis_request.RedisRequestOuterClass.RequestType.ZUnion;
 import static redis_request.RedisRequestOuterClass.RequestType.ZUnionStore;
@@ -209,6 +210,7 @@
 import glide.api.models.commands.geospatial.GeoUnit;
 import glide.api.models.commands.geospatial.GeospatialData;
 import glide.api.models.commands.scan.SScanOptions;
+import glide.api.models.commands.scan.ZScanOptions;
 import glide.api.models.commands.stream.StreamAddOptions;
 import glide.api.models.commands.stream.StreamGroupOptions;
 import glide.api.models.commands.stream.StreamPendingOptions;
@@ -2799,4 +2801,17 @@ public CompletableFuture<Object[]> sscan(
         String[] arguments = concatenateArrays(new String[] {key, cursor}, sScanOptions.toArgs());
         return commandManager.submitNewCommand(SScan, arguments, this::handleArrayResponse);
     }
+
+    @Override
+    public CompletableFuture<Object[]> zscan(@NonNull String key, @NonNull String cursor) {
+        String[] arguments = new String[] {key, cursor};
+        return commandManager.submitNewCommand(ZScan, arguments, this::handleArrayResponse);
+    }
+
+    @Override
+    public CompletableFuture<Object[]> zscan(
+            @NonNull String key, @NonNull String cursor, @NonNull ZScanOptions zScanOptions) {
+        String[] arguments = concatenateArrays(new String[] {key, cursor}, zScanOptions.toArgs());
+        return commandManager.submitNewCommand(ZScan, arguments, this::handleArrayResponse);
+    }
 }

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

@@ -19,6 +19,7 @@
 import glide.api.models.commands.WeightAggregateOptions.KeysOrWeightedKeys;
 import glide.api.models.commands.WeightAggregateOptions.WeightedKeys;
 import glide.api.models.commands.ZAddOptions;
+import glide.api.models.commands.scan.ZScanOptions;
 import java.util.Map;
 import java.util.concurrent.CompletableFuture;
 
@@ -1577,4 +1578,73 @@ CompletableFuture<Map<String, Double>> zinterWithScores(
      * }</pre>
      */
     CompletableFuture<Long> zintercard(GlideString[] keys, long limit);
+
+    /**
+     * Iterates incrementally over a sorted set.
+     *
+     * @see <a href="https://valkey.io/commands/zscan">valkey.io</a> for details.
+     * @param key The key of the set.
+     * @param cursor The cursor that points to the next iteration of results.
+     * @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 set. The second element is always an <code>
+     *     Array</code> of the subset of the set held in <code>key</code>. The array in the second
+     *     element is always a flattened series of String pairs, where the value is at even indices
+     *     and the score 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.zscan(key1, cursor).get();
+     *   cursor = result[0].toString();
+     *   Object[] stringResults = (Object[]) result[1];
+     *
+     *   System.out.println("\nZSCAN 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[]> zscan(String key, String cursor);
+
+    /**
+     * Iterates incrementally over a sorted set.
+     *
+     * @see <a href="https://valkey.io/commands/zscan">valkey.io</a> for details.
+     * @param key The key of the set.
+     * @param cursor The cursor that points to the next iteration of results.
+     * @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
+     *     </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>. The array in the second
+     *     element is always a flattened series of String pairs, where the value is at even indices
+     *     and the score 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.zscan(key1, cursor, ZScanOptions.builder().matchPattern("*").count(20L).build()).get();
+     *   cursor = result[0].toString();
+     *   Object[] stringResults = (Object[]) result[1];
+     *
+     *   System.out.println("\nZSCAN 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[]> zscan(String key, String cursor, ZScanOptions zScanOptions);
 }

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

@@ -193,6 +193,7 @@
 import static redis_request.RedisRequestOuterClass.RequestType.ZRemRangeByRank;
 import static redis_request.RedisRequestOuterClass.RequestType.ZRemRangeByScore;
 import static redis_request.RedisRequestOuterClass.RequestType.ZRevRank;
+import static redis_request.RedisRequestOuterClass.RequestType.ZScan;
 import static redis_request.RedisRequestOuterClass.RequestType.ZScore;
 import static redis_request.RedisRequestOuterClass.RequestType.ZUnion;
 import static redis_request.RedisRequestOuterClass.RequestType.ZUnionStore;
@@ -242,6 +243,7 @@
 import glide.api.models.commands.geospatial.GeoUnit;
 import glide.api.models.commands.geospatial.GeospatialData;
 import glide.api.models.commands.scan.SScanOptions;
+import glide.api.models.commands.scan.ZScanOptions;
 import glide.api.models.commands.stream.StreamAddOptions;
 import glide.api.models.commands.stream.StreamAddOptions.StreamAddOptionsBuilder;
 import glide.api.models.commands.stream.StreamGroupOptions;
@@ -5163,6 +5165,45 @@ public T sscan(@NonNull String key, @NonNull String cursor, @NonNull SScanOption
         return getThis();
     }
 
+    /**
+     * Iterates incrementally over a sorted set.
+     *
+     * @see <a href="https://valkey.io/commands/zscan">valkey.io</a> for details.
+     * @param key The key of the set.
+     * @param cursor The cursor that points to the next iteration of results.
+     * @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 set. The second element is
+     *     always an <code>Array</code> of the subset of the set held in <code>key</code>. The array
+     *     in the second element is always a flattened series of String pairs, where the value is at
+     *     even indices and the score is at odd indices.
+     */
+    public T zscan(@NonNull String key, @NonNull String cursor) {
+        protobufTransaction.addCommands(buildCommand(ZScan, buildArgs(key, cursor)));
+        return getThis();
+    }
+
+    /**
+     * Iterates incrementally over a sorted set.
+     *
+     * @see <a href="https://valkey.io/commands/zscan">valkey.io</a> for details.
+     * @param key The key of the set.
+     * @param cursor The cursor that points to the next iteration of results.
+     * @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
+     *     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>. The array
+     *     in the second element is always a flattened series of String pairs, where the value is at
+     *     even indices and the score is at odd indices.
+     */
+    public T zscan(@NonNull String key, @NonNull String cursor, @NonNull ZScanOptions zScanOptions) {
+        ArgsArray commandArgs =
+                buildArgs(concatenateArrays(new String[] {key, cursor}, zScanOptions.toArgs()));
+        protobufTransaction.addCommands(buildCommand(ZScan, 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/ZScanOptions.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.SortedSetBaseCommands;
+import lombok.experimental.SuperBuilder;
+
+/**
+ * Optional arguments for {@link SortedSetBaseCommands#zscan(String, String, ZScanOptions)}.
+ *
+ * @see <a href="https://valkey.io/commands/zscan/">valkey.io</a>
+ */
+@SuperBuilder
+public class ZScanOptions extends ScanOptions {}

java/client/src/test/java/glide/api/RedisClientTest.java

@@ -248,6 +248,7 @@
 import static redis_request.RedisRequestOuterClass.RequestType.ZRemRangeByRank;
 import static redis_request.RedisRequestOuterClass.RequestType.ZRemRangeByScore;
 import static redis_request.RedisRequestOuterClass.RequestType.ZRevRank;
+import static redis_request.RedisRequestOuterClass.RequestType.ZScan;
 import static redis_request.RedisRequestOuterClass.RequestType.ZScore;
 import static redis_request.RedisRequestOuterClass.RequestType.ZUnion;
 import static redis_request.RedisRequestOuterClass.RequestType.ZUnionStore;
@@ -298,6 +299,7 @@
 import glide.api.models.commands.geospatial.GeoUnit;
 import glide.api.models.commands.geospatial.GeospatialData;
 import glide.api.models.commands.scan.SScanOptions;
+import glide.api.models.commands.scan.ZScanOptions;
 import glide.api.models.commands.stream.StreamAddOptions;
 import glide.api.models.commands.stream.StreamGroupOptions;
 import glide.api.models.commands.stream.StreamPendingOptions;
@@ -9013,4 +9015,56 @@ public void sscan_with_options_returns_success() {
         assertEquals(testResponse, response);
         assertEquals(value, payload);
     }
+
+    @SneakyThrows
+    @Test
+    public void zscan_returns_success() {
+        // setup
+        String key = "testKey";
+        String cursor = "0";
+        String[] arguments = new String[] {key, cursor};
+        Object[] value = new Object[] {0L, new String[] {"hello", "world"}};
+
+        CompletableFuture<Object[]> testResponse = new CompletableFuture<>();
+        testResponse.complete(value);
+
+        // match on protobuf request
+        when(commandManager.<Object[]>submitNewCommand(eq(ZScan), eq(arguments), any()))
+                .thenReturn(testResponse);
+
+        // exercise
+        CompletableFuture<Object[]> response = service.zscan(key, cursor);
+        Object[] payload = response.get();
+
+        // verify
+        assertEquals(testResponse, response);
+        assertEquals(value, payload);
+    }
+
+    @SneakyThrows
+    @Test
+    public void zscan_with_options_returns_success() {
+        // setup
+        String key = "testKey";
+        String cursor = "0";
+        String[] arguments =
+                new String[] {key, cursor, MATCH_OPTION_STRING, "*", COUNT_OPTION_STRING, "1"};
+        Object[] value = new Object[] {0L, new String[] {"hello", "world"}};
+
+        CompletableFuture<Object[]> testResponse = new CompletableFuture<>();
+        testResponse.complete(value);
+
+        // match on protobuf request
+        when(commandManager.<Object[]>submitNewCommand(eq(ZScan), eq(arguments), any()))
+                .thenReturn(testResponse);
+
+        // exercise
+        CompletableFuture<Object[]> response =
+                service.zscan(key, cursor, ZScanOptions.builder().matchPattern("*").count(1L).build());
+        Object[] payload = response.get();
+
+        // verify
+        assertEquals(testResponse, response);
+        assertEquals(value, payload);
+    }
 }

java/client/src/test/java/glide/api/models/TransactionTests.java

@@ -211,6 +211,7 @@
 import static redis_request.RedisRequestOuterClass.RequestType.ZRemRangeByRank;
 import static redis_request.RedisRequestOuterClass.RequestType.ZRemRangeByScore;
 import static redis_request.RedisRequestOuterClass.RequestType.ZRevRank;
+import static redis_request.RedisRequestOuterClass.RequestType.ZScan;
 import static redis_request.RedisRequestOuterClass.RequestType.ZScore;
 import static redis_request.RedisRequestOuterClass.RequestType.ZUnion;
 import static redis_request.RedisRequestOuterClass.RequestType.ZUnionStore;
@@ -249,6 +250,7 @@
 import glide.api.models.commands.geospatial.GeoUnit;
 import glide.api.models.commands.geospatial.GeospatialData;
 import glide.api.models.commands.scan.SScanOptions;
+import glide.api.models.commands.scan.ZScanOptions;
 import glide.api.models.commands.stream.StreamAddOptions;
 import glide.api.models.commands.stream.StreamGroupOptions;
 import glide.api.models.commands.stream.StreamPendingOptions;
@@ -1176,6 +1178,12 @@ InfScoreBound.NEGATIVE_INFINITY, new ScoreBoundary(3, false), new Limit(1, 2)),
         transaction.sscan("key1", "0", SScanOptions.builder().matchPattern("*").count(10L).build());
         results.add(Pair.of(SScan, buildArgs("key1", "0", "MATCH", "*", "COUNT", "10")));
 
+        transaction.zscan("key1", "0");
+        results.add(Pair.of(ZScan, buildArgs("key1", "0")));
+
+        transaction.zscan("key1", "0", ZScanOptions.builder().matchPattern("*").count(10L).build());
+        results.add(Pair.of(ZScan, buildArgs("key1", "0", "MATCH", "*", "COUNT", "10")));
+
         var protobufTransaction = transaction.getProtobufTransaction().build();
 
         for (int idx = 0; idx < protobufTransaction.getCommandsCount(); idx++) {