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DOC-4423 list command examples #3433

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c3eb7ba
DOC-4423 async list command examples
andy-stark-redis Sep 5, 2025
31df8e8
DOC-4423 added reactive list command examples
andy-stark-redis Sep 5, 2025
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265 changes: 265 additions & 0 deletions src/test/java/io/redis/examples/async/CmdsListExample.java
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Original file line number Diff line number Diff line change
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// EXAMPLE: cmds_list
package io.redis.examples.async;

import io.lettuce.core.*;
import io.lettuce.core.api.async.RedisAsyncCommands;
import io.lettuce.core.api.StatefulRedisConnection;

import java.util.concurrent.CompletableFuture;
// REMOVE_START
import org.junit.jupiter.api.Test;
import static org.assertj.core.api.Assertions.assertThat;
// REMOVE_END

public class CmdsListExample {

// REMOVE_START
@Test
// REMOVE_END
public void run() {
RedisClient redisClient = RedisClient.create("redis://localhost:6379");

try (StatefulRedisConnection<String, String> connection = redisClient.connect()) {
RedisAsyncCommands<String, String> asyncCommands = connection.async();
// REMOVE_START
asyncCommands.del("mylist").toCompletableFuture().join();
// REMOVE_END

// STEP_START lpush
CompletableFuture<Void> lpush = asyncCommands.lpush("mylist", "world").thenCompose(res1 -> {
System.out.println(res1); // >>> 1
// REMOVE_START
assertThat(res1).isEqualTo(1);
// REMOVE_END

return asyncCommands.lpush("mylist", "hello");
}).thenCompose(res2 -> {
System.out.println(res2); // >>> 2
// REMOVE_START
assertThat(res2).isEqualTo(2);
// REMOVE_END

return asyncCommands.lrange("mylist", 0, -1);
})
// REMOVE_START
.thenApply(res3 -> {
assertThat(res3.toString()).isEqualTo("[hello, world]");
return res3;
})
// REMOVE_END
.thenAccept(res3 -> System.out.println(res3)) // >>> [hello, world]
.toCompletableFuture();
// STEP_END
lpush.join();

// REMOVE_START
asyncCommands.del("mylist").toCompletableFuture().join();
// REMOVE_END

// STEP_START lrange
CompletableFuture<Void> lrange = asyncCommands.rpush("mylist", "one").thenCompose(res4 -> {
System.out.println(res4); // >>> 1
// REMOVE_START
assertThat(res4).isEqualTo(1);
// REMOVE_END

return asyncCommands.rpush("mylist", "two");
}).thenCompose(res5 -> {
System.out.println(res5); // >>> 2
// REMOVE_START
assertThat(res5).isEqualTo(2);
// REMOVE_END

return asyncCommands.rpush("mylist", "three");
}).thenCompose(res6 -> {
System.out.println(res6); // >>> 3
// REMOVE_START
assertThat(res6).isEqualTo(3);
// REMOVE_END

return asyncCommands.lrange("mylist", 0, 0);
}).thenCompose(res7 -> {
System.out.println(res7); // >>> [one]
// REMOVE_START
assertThat(res7.toString()).isEqualTo("[one]");
// REMOVE_END

return asyncCommands.lrange("mylist", -3, 2);
}).thenCompose(res8 -> {
System.out.println(res8); // >>> [one, two, three]
// REMOVE_START
assertThat(res8.toString()).isEqualTo("[one, two, three]");
// REMOVE_END

return asyncCommands.lrange("mylist", -100, 100);
}).thenCompose(res9 -> {
System.out.println(res9); // >>> [one, two, three]
// REMOVE_START
assertThat(res9.toString()).isEqualTo("[one, two, three]");
// REMOVE_END

return asyncCommands.lrange("mylist", 5, 10);
})
// REMOVE_START
.thenApply(res10 -> {
assertThat(res10.toString()).isEqualTo("[]");
return res10;
})
// REMOVE_END
.thenAccept(res10 -> System.out.println(res10)) // >>> []
.toCompletableFuture();
// STEP_END
lrange.join();

// REMOVE_START
asyncCommands.del("mylist").toCompletableFuture().join();
// REMOVE_END

// STEP_START llen
CompletableFuture<Void> llen = asyncCommands.lpush("mylist", "World").thenCompose(res11 -> {
System.out.println(res11); // >>> 1
// REMOVE_START
assertThat(res11).isEqualTo(1);
// REMOVE_END

return asyncCommands.lpush("mylist", "Hello");
}).thenCompose(res12 -> {
System.out.println(res12); // >>> 2
// REMOVE_START
assertThat(res12).isEqualTo(2);
// REMOVE_END

return asyncCommands.llen("mylist");
})
// REMOVE_START
.thenApply(res13 -> {
assertThat(res13).isEqualTo(2);
return res13;
})
// REMOVE_END
.thenAccept(res13 -> System.out.println(res13)) // >>> 2
.toCompletableFuture();
// STEP_END
llen.join();

// REMOVE_START
asyncCommands.del("mylist").toCompletableFuture().join();
// REMOVE_END

// STEP_START rpush
CompletableFuture<Void> rpush = asyncCommands.rpush("mylist", "hello").thenCompose(res14 -> {
System.out.println(res14); // >>> 1
// REMOVE_START
assertThat(res14).isEqualTo(1);
// REMOVE_END

return asyncCommands.rpush("mylist", "world");
}).thenCompose(res15 -> {
System.out.println(res15); // >>> 2
// REMOVE_START
assertThat(res15).isEqualTo(2);
// REMOVE_END

return asyncCommands.lrange("mylist", 0, -1);
})
// REMOVE_START
.thenApply(res16 -> {
assertThat(res16.toString()).isEqualTo("[hello, world]");
return res16;
})
// REMOVE_END
.thenAccept(res16 -> System.out.println(res16)) // >>> [hello, world]
.toCompletableFuture();
// STEP_END
rpush.join();

// REMOVE_START
asyncCommands.del("mylist").toCompletableFuture().join();
// REMOVE_END

// STEP_START lpop
CompletableFuture<Void> lpop = asyncCommands.rpush("mylist", "one", "two", "three", "four", "five")
.thenCompose(res17 -> {
System.out.println(res17); // >>> 5
// REMOVE_START
assertThat(res17).isEqualTo(5);
// REMOVE_END

return asyncCommands.lpop("mylist");
}).thenCompose(res18 -> {
System.out.println(res18); // >>> one
// REMOVE_START
assertThat(res18).isEqualTo("one");
// REMOVE_END

return asyncCommands.lpop("mylist", 2);
}).thenCompose(res19 -> {
System.out.println(res19); // >>> [two, three]
// REMOVE_START
assertThat(res19.toString()).isEqualTo("[two, three]");
// REMOVE_END

return asyncCommands.lrange("mylist", 0, -1);
})
// REMOVE_START
.thenApply(res17_final -> {
assertThat(res17_final.toString()).isEqualTo("[four, five]");
return res17_final;
})
// REMOVE_END
.thenAccept(res17_final -> System.out.println(res17_final)) // >>> [four, five]
.toCompletableFuture();
// STEP_END
lpop.join();

// REMOVE_START
asyncCommands.del("mylist").toCompletableFuture().join();
// REMOVE_END

// STEP_START rpop
CompletableFuture<Void> rpop = asyncCommands.rpush("mylist", "one", "two", "three", "four", "five")
.thenCompose(res18 -> {
System.out.println(res18); // >>> 5
// REMOVE_START
assertThat(res18).isEqualTo(5);
// REMOVE_END

return asyncCommands.rpop("mylist");
}).thenCompose(res19 -> {
System.out.println(res19); // >>> five
// REMOVE_START
assertThat(res19).isEqualTo("five");
// REMOVE_END

return asyncCommands.rpop("mylist", 2);
}).thenCompose(res20 -> {
System.out.println(res20); // >>> [four, three]
// REMOVE_START
assertThat(res20.toString()).isEqualTo("[four, three]");
// REMOVE_END

return asyncCommands.lrange("mylist", 0, -1);
})
// REMOVE_START
.thenApply(res21 -> {
assertThat(res21.toString()).isEqualTo("[one, two]");
return res21;
})
// REMOVE_END
.thenAccept(res21 -> System.out.println(res21)) // >>> [one, two]
.toCompletableFuture();
// STEP_END
rpop.join();

// REMOVE_START
asyncCommands.del("mylist").toCompletableFuture().join();
// REMOVE_END

// HIDE_START
} finally {
redisClient.shutdown();
}
}

}
// HIDE_END
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