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DOC-5376 added reactive sets examples #3337

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eb1a743
DOC-5376 added reactive sets examples
andy-stark-redis Jun 26, 2025
f9db635
Merge branch 'main' into DOC-5376-reactive-sets-examples
andy-stark-redis Jul 24, 2025
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230 changes: 230 additions & 0 deletions src/test/java/io/redis/examples/reactive/SetExample.java
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Original file line number Diff line number Diff line change
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// EXAMPLE: sets_tutorial
package io.redis.examples.reactive;

import io.lettuce.core.*;
import io.lettuce.core.api.reactive.RedisReactiveCommands;
import io.lettuce.core.api.StatefulRedisConnection;
// REMOVE_START
import org.junit.jupiter.api.Test;
import static org.assertj.core.api.Assertions.assertThat;
// REMOVE_END

import reactor.core.publisher.Mono;

import java.util.*;

public class SetExample {

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

try (StatefulRedisConnection<String, String> connection = redisClient.connect()) {
RedisReactiveCommands<String, String> reactiveCommands = connection.reactive();
// REMOVE_START
// Clean up any existing data
Mono<Void> cleanup = reactiveCommands.del("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy").then();
cleanup.block();
// REMOVE_END

// STEP_START sadd
Mono<Void> sAdd = reactiveCommands.sadd("bikes:racing:france", "bike:1").doOnNext(result -> {
System.out.println(result); // >>> 1
// REMOVE_START
assertThat(result).isEqualTo(1L);
// REMOVE_END
}).flatMap(v -> reactiveCommands.sadd("bikes:racing:france", "bike:1")).doOnNext(result -> {
System.out.println(result); // >>> 0
// REMOVE_START
assertThat(result).isEqualTo(0L);
// REMOVE_END
}).flatMap(v -> reactiveCommands.sadd("bikes:racing:france", "bike:2", "bike:3")).doOnNext(result -> {
System.out.println(result); // >>> 2
// REMOVE_START
assertThat(result).isEqualTo(2L);
// REMOVE_END
}).flatMap(v -> reactiveCommands.sadd("bikes:racing:usa", "bike:1", "bike:4")).doOnNext(result -> {
System.out.println(result); // >>> 2
// REMOVE_START
assertThat(result).isEqualTo(2L);
// REMOVE_END
}).then();
// STEP_END
sAdd.block();

// STEP_START sismember
Mono<Boolean> sIsMember1 = reactiveCommands.sismember("bikes:racing:usa", "bike:1").doOnNext(result -> {
System.out.println(result); // >>> true
// REMOVE_START
assertThat(result).isTrue();
// REMOVE_END
});

Mono<Boolean> sIsMember2 = reactiveCommands.sismember("bikes:racing:usa", "bike:2").doOnNext(result -> {
System.out.println(result); // >>> false
// REMOVE_START
assertThat(result).isFalse();
// REMOVE_END
});
// STEP_END

// STEP_START sinter
Mono<List<String>> sInter = reactiveCommands.sinter("bikes:racing:france", "bikes:racing:usa").collectList()
.doOnNext(result -> {
System.out.println(result); // >>> [bike:1]
// REMOVE_START
assertThat(result).containsExactly("bike:1");
// REMOVE_END
});
// STEP_END

// STEP_START scard
Mono<Long> sCard = reactiveCommands.scard("bikes:racing:france").doOnNext(result -> {
System.out.println(result); // >>> 3
// REMOVE_START
assertThat(result).isEqualTo(3L);
// REMOVE_END
});
// STEP_END

Mono.when(sIsMember1, sIsMember2, sInter, sCard).block();

// STEP_START sadd_smembers
Mono<Void> sAddSMembers = reactiveCommands.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
.doOnNext(result -> {
System.out.println(result); // >>> 3
// REMOVE_START
assertThat(result).isEqualTo(0L);
// REMOVE_END
}).flatMap(v -> reactiveCommands.smembers("bikes:racing:france").collectList()).doOnNext(result -> {
System.out.println(result); // >>> [bike:1, bike:2, bike:3]
// REMOVE_START
assertThat(result).containsExactlyInAnyOrder("bike:1", "bike:2", "bike:3");
// REMOVE_END
}).then();
// STEP_END
sAddSMembers.block();

// STEP_START smismember
Mono<Boolean> sIsMember3 = reactiveCommands.sismember("bikes:racing:france", "bike:1").doOnNext(result -> {
System.out.println(result); // >>> true
// REMOVE_START
assertThat(result).isTrue();
// REMOVE_END
});

Mono<List<Boolean>> sMIsMember = reactiveCommands.smismember("bikes:racing:france", "bike:2", "bike:3", "bike:4")
.collectList().doOnNext(result -> {
System.out.println(result); // >>> [true, true, false]
// REMOVE_START
assertThat(result).containsExactly(true, true, false);
// REMOVE_END
});
// STEP_END

// STEP_START sdiff
Mono<List<String>> sDiff = reactiveCommands.sdiff("bikes:racing:france", "bikes:racing:usa").collectList()
.doOnNext(result -> {
System.out.println(result); // >>> [bike:2, bike:3]
// REMOVE_START
assertThat(result).containsExactlyInAnyOrder("bike:2", "bike:3");
// REMOVE_END
});
// STEP_END

Mono.when(sIsMember3, sMIsMember, sDiff).block();

// STEP_START multisets
Mono<Void> add3sets = reactiveCommands.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3")
.doOnNext(result -> {
System.out.println(result); // >>> 0
// REMOVE_START
assertThat(result).isEqualTo(0L);
// REMOVE_END
}).flatMap(v -> reactiveCommands.sadd("bikes:racing:usa", "bike:1", "bike:4")).doOnNext(result -> {
System.out.println(result); // >>> 0
// REMOVE_START
assertThat(result).isEqualTo(0L);
// REMOVE_END
}).flatMap(v -> reactiveCommands.sadd("bikes:racing:italy", "bike:1", "bike:2", "bike:3", "bike:4"))
.doOnNext(result -> {
System.out.println(result); // >>> 4,
// REMOVE_START
assertThat(result).isEqualTo(4L);
// REMOVE_END
}).then();
add3sets.block();

Mono<List<String>> multisets1 = reactiveCommands
.sinter("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy").collectList().doOnNext(result -> {
System.out.println(result); // >>> [bike:1]
// REMOVE_START
assertThat(result).containsExactly("bike:1");
// REMOVE_END
});

Mono<List<String>> multisets2 = reactiveCommands
.sunion("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy").collectList().doOnNext(result -> {
System.out.println(result); // >>> [bike:1, bike:2, bike:3, bike:4]
// REMOVE_START
assertThat(result).containsExactlyInAnyOrder("bike:1", "bike:2", "bike:3", "bike:4");
// REMOVE_END
});

Mono<List<String>> multisets3 = reactiveCommands
.sdiff("bikes:racing:france", "bikes:racing:usa", "bikes:racing:italy").collectList().doOnNext(result -> {
System.out.println(result); // >>> []
// REMOVE_START
assertThat(result).isEmpty();
// REMOVE_END
});

Mono<List<String>> multisets4 = reactiveCommands.sdiff("bikes:racing:usa", "bikes:racing:france").collectList()
.doOnNext(result -> {
System.out.println(result); // >>> [bike:4]
// REMOVE_START
assertThat(result).containsExactly("bike:4");
// REMOVE_END
});

Mono<List<String>> multisets5 = reactiveCommands.sdiff("bikes:racing:france", "bikes:racing:usa").collectList()
.doOnNext(result -> {
System.out.println(result); // >>> [bike:2, bike:3]
// REMOVE_START
assertThat(result).containsExactlyInAnyOrder("bike:2", "bike:3");
// REMOVE_END
});
// STEP_END

Mono.when(multisets1, multisets2, multisets3, multisets4, multisets5).block();

// STEP_START srem
Mono<Void> sRem = reactiveCommands.sadd("bikes:racing:france", "bike:1", "bike:2", "bike:3", "bike:4", "bike:5")
.doOnNext(result -> {
System.out.println(result); // >>> 2
// REMOVE_START
assertThat(result).isEqualTo(2L);
// REMOVE_END
}).flatMap(v -> reactiveCommands.srem("bikes:racing:france", "bike:1")).doOnNext(result -> {
System.out.println(result); // >>> 1
// REMOVE_START
assertThat(result).isEqualTo(1L);
// REMOVE_END
}).flatMap(v -> reactiveCommands.spop("bikes:racing:france")).doOnNext(result -> {
System.out.println(result); // >>> bike:3 (for example)
}).flatMap(v -> reactiveCommands.smembers("bikes:racing:france").collectList()).doOnNext(result -> {
System.out.println(result); // >>> [bike:2, bike:4, bike:5] (for example)
}).flatMap(v -> reactiveCommands.srandmember("bikes:racing:france")).doOnNext(result -> {
System.out.println(result); // >>> bike:4 (for example)
}).then();
// STEP_END

sRem.block();
} finally {
redisClient.shutdown();
}
}

}