ReactiveSetOperations 操作接口

Spring Data Redis 中,Set 类型的响应式接口为 ReactiveSetOperations,该接口定义的方法和 SetOperations、BoundSetOperations 接口定义的方法非常类似。

我们可以通过 ReactiveRedisTemplate 的 opsForSet() 方法获取获取,代码如下:

ReactiveSetOperations<String,String> ops = reactiveRedisTemplate.opsForSet();

添加元素

  • reactor.core.publisher.Mono<Long> add(K key, V... values) 将给定的 values 添加到 key 对应的集合。

示例:

@Test
public void add() throws Exception {
    LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<>();
    ReactiveSetOperations<String,String> ops = reactiveRedisTemplate.opsForSet();
    ops.add("set-key", "value1", "value2", "value3")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    ops.members("set-key").collectList()
            .subscribe(new Consumer<List<String>>() {
                @Override
                public void accept(List<String> strings) {
                    System.out.println(Arrays.toString(strings.toArray()));
                }
            });
}

运行示例,输出结果如下:

向 set-key 成功添加 3 元素
[value1, value3, value2]

删除键

  • reactor.core.publisher.Mono<Boolean> delete(K key) 删除给定的键。

示例:

@Test
public void delete() throws Exception {
    LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<>();
    ReactiveSetOperations<String,String> ops = reactiveRedisTemplate.opsForSet();
    ops.add("set-key", "value1", "value2", "value3")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    // 删除
    ops.delete("set-key")
            .subscribe(new Consumer<Boolean>() {
                @Override
                public void accept(Boolean aBoolean) {
                    queue.add(aBoolean ? "删除 set-key 成功" : "删除 set-key 失败");
                }
            });
    System.out.println(queue.take());

    // 验证key是否存在
    ops.members("set-key").collectList()
            .subscribe(new Consumer<List<String>>() {
                @Override
                public void accept(List<String> strings) {
                    System.out.println(Arrays.toString(strings.toArray()));
                }
            });
}

运行示例,输出结果如下:

向 set-key 成功添加 3 元素
删除 set-key 成功
[]

计算差异

  • reactor.core.publisher.Flux<V> difference(K key, Collection<K> otherKeys) 计算 key 和 otherKeys 对应集合的差异,返回 key 集合中没有在 otherKeys 集合中存在的元素列表

  • reactor.core.publisher.Flux<V> difference(K key, K otherKey) 计算 key 和 otherKey 对应集合的差异,返回 key 集合中没有在 otherKeys 集合中存在的元素列表

  • reactor.core.publisher.Mono<Long> differenceAndStore(K key, Collection<K> otherKeys, K destKey) 计算 key 和 otherKeys 对应集合的差异,并且将 key 集合中没有在 otherKeys 集合中存在的元素列表存储到 destKey 集合

  • reactor.core.publisher.Mono<Long> differenceAndStore(K key, K otherKey, K destKey) 计算 key 和 otherKeys 对应集合的差异,并且将 key 集合中没有在 otherKey 集合中存在的元素列表存储到 destKey 集合

示例:

@Test
public void difference() throws Exception {
    LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<>();
    ReactiveSetOperations<String,String> ops = reactiveRedisTemplate.opsForSet();
    ops.add("set-key1", "value1", "value2", "value3")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key1 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    ops.add("set-key2", "value1", "value2", "value4")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key2 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    // 计算两个key的
    ops.difference("set-key1", "set-key2")
            .collectList().subscribe(new Consumer<List<String>>() {
        @Override
        public void accept(List<String> strings) {
            System.out.println("difference:" + Arrays.toString(strings.toArray()));
        }
    });
}

运行示例,输出结果如下:

向 set-key1 成功添加 3 元素
向 set-key2 成功添加 3 元素
difference:[value3]

随机获取多个元素

  • reactor.core.publisher.Flux<V> distinctRandomMembers(K key, long count) 随机从 key 对应的集合中获取多个元素,这些元素不能相同。

示例:

@Test
public void distinctRandomMembers() throws Exception {
    LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<>();
    ReactiveSetOperations<String,String> ops = reactiveRedisTemplate.opsForSet();
    ops.add("set-key", "value1", "value2", "value3", "value4", "value5")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    ops.distinctRandomMembers("set-key", 2).collectList()
            .subscribe(new Consumer<List<String>>() {
                @Override
                public void accept(List<String> strings) {
                    System.out.println(Arrays.toString(strings.toArray()));
                }
            });
}

运行示例,输出结果如下:

向 set-key 成功添加 5 元素
[value4, value2]

计算集合交集

  • reactor.core.publisher.Flux<V> intersect(K key, Collection<K> otherKeys) 计算 key 和 otherKeys 集合所有元素的交集

  • reactor.core.publisher.Flux<V> intersect(K key, K otherKey) 计算 key 和 otherKey 集合所有元素的交集

  • reactor.core.publisher.Mono<Long> intersectAndStore(K key, Collection<K> otherKeys, K destKey) 计算 key 和 otherKeys 集合所有元素的交集,并且将结果存储到 destKey 集合

  • reactor.core.publisher.Mono<Long> intersectAndStore(K key, K otherKey, K destKey) 计算 key 和 otherKeys 集合所有元素的交集,并且将结果存储到 destKey 集合

示例:

@Test
public void intersect() throws Exception {
    LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<>();
    ReactiveSetOperations<String,String> ops = reactiveRedisTemplate.opsForSet();
    ops.add("set-key1", "value1", "value2", "value3")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key1 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    ops.add("set-key2", "value1", "value2", "value4")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key2 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    ops.add("set-key3", "value1", "value2", "value5")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key3 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    // 计算两个key的
    ops.intersect("set-key1", Arrays.asList("set-key2", "set-key3"))
            .collectList().subscribe(new Consumer<List<String>>() {
        @Override
        public void accept(List<String> strings) {
            System.out.println("intersect:" + Arrays.toString(strings.toArray()));
        }
    });
}

运行示例,输出结果如下:

向 set-key1 成功添加 3 元素
向 set-key2 成功添加 3 元素
向 set-key3 成功添加 3 元素
intersect:[value1, value2]

判断是否为成员

  • reactor.core.publisher.Mono<Boolean> isMember(K key, Object o) 检查指定的值 o 是否是 key 对应集合中的成员。如果是,则发返回 true。如果不是,则返回 false。

示例:

@Test
public void isMember() throws Exception {
    LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<>();
    ReactiveSetOperations<String,String> ops = reactiveRedisTemplate.opsForSet();
    ops.add("set-key", "value1", "value2", "value3", "value4")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    ops.isMember("set-key", "value3")
            .subscribe(new Consumer<Boolean>() {
                @Override
                public void accept(Boolean aBoolean) {
                    queue.add(aBoolean ? "value3 存在" : "value3 不存在");
                }
            });
    System.out.println(queue.take());

    ops.isMember("set-key", "value5")
            .subscribe(new Consumer<Boolean>() {
                @Override
                public void accept(Boolean aBoolean) {
                    queue.add(aBoolean ? "value5 存在" : "value5 不存在");
                }
            });
    System.out.println(queue.take());
}

运行示例,输出结果如下:

向 set-key 成功添加 4 元素
value3 存在
value5 不存在

返回所有元素

  • reactor.core.publisher.Flux<V> members(K key) 返回指定 key 对应集合的所有元素

示例:

@Test
public void members() throws Exception {
    LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<>();
    ReactiveSetOperations<String,String> ops = reactiveRedisTemplate.opsForSet();
    ops.add("set-key", "value1", "value2", "value3")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    ops.members("set-key").collectList()
            .subscribe(new Consumer<List<String>>() {
                @Override
                public void accept(List<String> strings) {
                    System.out.println(Arrays.toString(strings.toArray()));
                }
            });
}

运行示例,输出结果如下:

向 set-key 成功添加 3 元素
[value1, value3, value2]

移动元素

  • reactor.core.publisher.Mono<Boolean> move(K sourceKey, V value, K destKey) 将指定 value 从 sourceKey 移动到 destKey 集合

示例:

@Test
public void move() throws Exception {
    LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<>();
    ReactiveSetOperations<String,String> ops = reactiveRedisTemplate.opsForSet();
    ops.add("set-key", "value1", "value2", "value3", "value4")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    // 将 value2 从 set-key 移动到 set-key2
    ops.move("set-key", "value2", "set-key2");

    ops.members("set-key").collectList()
            .subscribe(new Consumer<List<String>>() {
                @Override
                public void accept(List<String> strings) {
                    queue.add(Arrays.toString(strings.toArray()));
                }
            });
    System.out.println(queue.take());

    ops.members("set-key2").collectList()
            .subscribe(new Consumer<List<String>>() {
                @Override
                public void accept(List<String> strings) {
                    queue.add(Arrays.toString(strings.toArray()));
                }
            });
    System.out.println(queue.take());
}

运行示例,输出结果如下:

向 set-key 成功添加 4 元素
[value4, value1, value3, value2]
[]

弹出元素

  • reactor.core.publisher.Mono<V> pop(K key) 从 key 对应集合中随机移除且返回一个元素

  • reactor.core.publisher.Flux<V> pop(K key, long count) 从 key 对应集合中随机移除且返回 count 个元素

示例:

@Test
public void pop() throws Exception {
    LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<>();
    ReactiveSetOperations<String,String> ops = reactiveRedisTemplate.opsForSet();
    ops.add("set-key", "value1", "value2", "value3", "value4")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    ops.pop("set-key").subscribe(new Consumer<String>() {
        @Override
        public void accept(String s) {
            queue.add("pop: " + s);
        }
    });
    System.out.println(queue.take());
}

运行示例,输出结果如下:

向 set-key 成功添加 4 元素
pop: value3

随机返回元素

  • reactor.core.publisher.Mono<V> randomMember(K key) 从 key 对应的集合中随机返回一个元素

  • reactor.core.publisher.Flux<V> randomMembers(K key, long count) 从 key 对应的集合中随机返回 count 元素

示例:

@Test
public void randomMember() throws Exception {
    LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<>();
    ReactiveSetOperations<String,String> ops = reactiveRedisTemplate.opsForSet();
    ops.add("set-key", "value1", "value2", "value3", "value4")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    ops.randomMember("set-key").subscribe(new Consumer<String>() {
        @Override
        public void accept(String s) {
            queue.add(s);
        }
    });
    System.out.println(queue.take());
}

运行示例,输出结果如下:

向 set-key 成功添加 4 元素
value1

移除元素

  • reactor.core.publisher.Mono<Long> remove(K key, Object... values) 从 key 对应的集合中移除 values 多个元素

示例:

@Test
public void remove() throws Exception {
    LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<>();
    ReactiveSetOperations<String,String> ops = reactiveRedisTemplate.opsForSet();
    ops.add("set-key", "value1", "value2", "value3", "value4")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    ops.remove("set-key", "value2", "value4")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("从 set-key 删除" + aLong + "个元素");
                }
            });
    System.out.println(queue.take());

    ops.members("set-key").collectList()
            .subscribe(new Consumer<List<String>>() {
                @Override
                public void accept(List<String> strings) {
                    queue.add(Arrays.toString(strings.toArray()));
                }
            });
    System.out.println(queue.take());
}

运行示例,输出结果如下:

向 set-key 成功添加 4 元素
从 set-key 删除2个元素
[value1, value3]

集合大小

  • reactor.core.publisher.Mono<Long> size(K key) 返回 key 对应集合的大小

示例:

@Test
public void size() throws Exception {
    LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<>();
    ReactiveSetOperations<String,String> ops = reactiveRedisTemplate.opsForSet();
    ops.add("set-key", "value1", "value2", "value3", "value4")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    ops.size("set-key").subscribe(new Consumer<Long>() {
        @Override
        public void accept(Long aLong) {
            queue.add("set-key 有" + aLong + "个元素");
        }
    });
    System.out.println(queue.take());
}

运行示例,输出结果如下:

向 set-key 成功添加 4 元素
set-key 有4个元素

合并集合

  • reactor.core.publisher.Flux<V> union(K key, Collection<K> otherKeys) 合并 key 和 otherKeys 集合中的元素

  • reactor.core.publisher.Flux<V> union(K key, K otherKey) 合并 key 和 otherKey 集合中的元素

  • reactor.core.publisher.Mono<Long> unionAndStore(K key, Collection<K> otherKeys, K destKey) 合并 key 和 otherKeys 集合中的元素,并且将合并结果存储到 destKey 集合

  • reactor.core.publisher.Mono<Long> unionAndStore(K key, K otherKey, K destKey) 合并 key 和 otherKeys 集合中的元素,并且将合并结果存储到 destKey 集合

示例:

@Test
public void union() throws Exception {
    LinkedBlockingQueue<String> queue = new LinkedBlockingQueue<>();
    ReactiveSetOperations<String,String> ops = reactiveRedisTemplate.opsForSet();
    ops.add("set-key1", "value1", "value2", "value3")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key1 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    ops.add("set-key2", "value1", "value2", "value4")
            .subscribe(new Consumer<Long>() {
                @Override
                public void accept(Long aLong) {
                    queue.add("向 set-key2 成功添加 " + aLong + " 元素");
                }
            });
    System.out.println(queue.take());

    // 计算两个key的
    ops.union("set-key1", "set-key2")
            .collectList().subscribe(new Consumer<List<String>>() {
        @Override
        public void accept(List<String> strings) {
            System.out.println("union:" + Arrays.toString(strings.toArray()));
        }
    });
}

运行示例,输出结果如下:

向 set-key1 成功添加 3 元素
向 set-key2 成功添加 3 元素
union:[value3, value2, value1, value4]


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