Add support for CLIENT NO-EVICT command

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

@@ -321,6 +321,11 @@ public RedisFuture<String> clientList() {
         return dispatch(commandBuilder.clientList());
     }
 
+    @Override
+    public RedisFuture<String> clientNoEvict(boolean on) {
+        return dispatch(commandBuilder.clientNoEvict(on));
+    }
+
     @Override
     public RedisFuture<Long> clientId() {
         return dispatch(commandBuilder.clientId());

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

@@ -337,6 +337,11 @@ public Mono<String> clientList() {
         return createMono(commandBuilder::clientList);
     }
 
+    @Override
+    public Mono<String> clientNoEvict(boolean on) {
+        return createMono(() -> commandBuilder.clientNoEvict(on));
+    }
+
     @Override
     public Mono<Long> clientId() {
         return createMono(commandBuilder::clientId);

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

@@ -435,6 +435,11 @@ Command<K, V, String> clientList() {
         return createCommand(CLIENT, new StatusOutput<>(codec), args);
     }
 
+    Command<K, V, String> clientNoEvict(boolean on) {
+        CommandArgs<K, V> args = new CommandArgs<>(codec).add("NO-EVICT").add(on ? ON : OFF);
+        return createCommand(CLIENT, new StatusOutput<>(codec), args);
+    }
+
     Command<K, V, Long> clientId() {
         CommandArgs<K, V> args = new CommandArgs<>(codec).add(ID);
         return createCommand(CLIENT, new IntegerOutput<>(codec), args);

src/main/java/io/lettuce/core/api/async/RedisServerAsyncCommands.java

@@ -108,6 +108,15 @@ public interface RedisServerAsyncCommands<K, V> {
      */
     RedisFuture<String> clientList();
 
+    /**
+     * Sets the client eviction mode for the current connection.
+     *
+     * @param on {@code true} will turn eviction mode on, and {@code false} will turn it off.
+     * @return String simple-string-reply {@code OK}.
+     * @since 7.0
+     */
+    RedisFuture<String> clientNoEvict(boolean on);
+
     /**
      * Stop processing commands from clients for some time.
      *

src/main/java/io/lettuce/core/api/reactive/RedisServerReactiveCommands.java

@@ -108,6 +108,15 @@ public interface RedisServerReactiveCommands<K, V> {
      */
     Mono<String> clientList();
 
+    /**
+     * Sets the client eviction mode for the current connection.
+     *
+     * @param on {@code true} will turn eviction mode on, and {@code false} will turn it off.
+     * @return String simple-string-reply {@code OK}.
+     * @since 7.0
+     */
+    Mono<String> clientNoEvict(boolean on);
+
     /**
      * Stop processing commands from clients for some time.
      *

src/main/java/io/lettuce/core/api/sync/RedisServerCommands.java

@@ -107,6 +107,15 @@ public interface RedisServerCommands<K, V> {
      */
     String clientList();
 
+    /**
+     * Sets the client eviction mode for the current connection.
+     *
+     * @param on {@code true} will turn eviction mode on, and {@code false} will turn it off.
+     * @return String simple-string-reply {@code OK}.
+     * @since 7.0
+     */
+    String clientNoEvict(boolean on);
+
     /**
      * Stop processing commands from clients for some time.
      *

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

@@ -107,6 +107,15 @@ public interface NodeSelectionServerAsyncCommands<K, V> {
      */
     AsyncExecutions<String> clientList();
 
+    /**
+     * Sets the client eviction mode for the current connection.
+     *
+     * @param on {@code true} will turn eviction mode on, and {@code false} will turn it off.
+     * @return String simple-string-reply {@code OK}.
+     * @since 7.0
+     */
+    AsyncExecutions<String> clientNoEvict(boolean on);
+
     /**
      * Stop processing commands from clients for some time.
      *

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2021 the original author or authors.
+ * Copyright 2017-2022 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -107,6 +107,15 @@ public interface NodeSelectionServerCommands<K, V> {
      */
     Executions<String> clientList();
 
+    /**
+     * Sets the client eviction mode for the current connection.
+     *
+     * @param on {@code true} will turn eviction mode on, and {@code false} will turn it off.
+     * @return String simple-string-reply {@code OK}.
+     * @since 7.0
+     */
+    Executions<String> clientNoEvict(boolean on);
+
     /**
      * Stop processing commands from clients for some time.
      *

src/main/kotlin/io/lettuce/core/api/coroutines/RedisServerCoroutinesCommands.kt

@@ -103,6 +103,15 @@ interface RedisServerCoroutinesCommands<K : Any, V : Any> {
      */
     suspend fun clientList(): String?
 
+    /**
+     * Sets the client eviction mode for the current connection.
+     *
+     * @param on @code true} will turn eviction mode on, and `false` will turn it off.
+     * @return String simple-string-reply `OK`.
+     * @since 7.0
+     */
+    suspend fun clientNoEvict(on: Boolean): String?
+
     /**
      * Stop processing commands from clients for some time.
      *

src/main/kotlin/io/lettuce/core/api/coroutines/RedisServerCoroutinesCommandsImpl.kt

@@ -60,6 +60,8 @@ internal class RedisServerCoroutinesCommandsImpl<K : Any, V : Any>(internal val
 
     override suspend fun clientList(): String? = ops.clientList().awaitFirstOrNull()
 
+    override suspend fun clientNoEvict(on: Boolean): String? = ops.clientNoEvict(on).awaitFirstOrNull()
+
     override suspend fun clientPause(timeout: Long): String? = ops.clientPause(timeout).awaitFirstOrNull()
 
     override suspend fun clientSetname(name: K): String? = ops.clientSetname(name).awaitFirstOrNull()

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

@@ -106,6 +106,15 @@ public interface RedisServerCommands<K, V> {
      */
     String clientList();
 
+    /**
+     * Sets the client eviction mode for the current connection.
+     *
+     * @param on {@code true} will turn eviction mode on, and {@code false} will turn it off.
+     * @return String simple-string-reply {@code OK}.
+     * @since 7.0
+     */
+    String clientNoEvict(boolean on);
+
     /**
      * Stop processing commands from clients for some time.
      *

src/test/java/io/lettuce/core/commands/ServerCommandIntegrationTests.java

@@ -196,6 +196,13 @@ void clientList() {
         assertThat(redis.clientList().contains("addr=")).isTrue();
     }
 
+    @Test
+    @EnabledOnCommand("EVAL_RO")   // Redis 7.0
+    void clientNoEvict() {
+        assertThat(redis.clientNoEvict(true)).isEqualTo("OK");
+        assertThat(redis.clientNoEvict(false)).isEqualTo("OK");
+    }
+
     @Test
     @EnabledOnCommand("ACL")
     void clientTracking() {