redisson
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1.概述
redisson是一个支持分布式的redisson客户端,支持对象的分布式存储。它不仅提供了一系列的分布式的Java常用对象,还提供了许多分布式服务。
2.配置方法
redisson支持程序化的方式,yaml,xml,json等配置方式
Config config = new Config(); config.setTransportMode(TransportMode.EPOLL); config.useClusterServers() //可以用"rediss://"来启用SSL连接 .addNodeAddress("redis://127.0.0.1:7181"); //json方式 Config config = Config.fromJSON(new File("config-file.json")); RedissonClient redisson = Redisson.create(config); //yaml方式 Config config = Config.fromYAML(new File("config-file.yaml")); RedissonClient redisson = Redisson.create(config);
clusterServersConfig:
idleConnectionTimeout: 10000
pingTimeout: 1000
connectTimeout: 10000
timeout: 3000
retryAttempts: 3
retryInterval: 1500
reconnectionTimeout: 3000
failedAttempts: 3
password: null
subscriptionsPerConnection: 5
clientName: null
loadBalancer: !<org.redisson.connection.balancer.RoundRobinLoadBalancer> {}
slaveSubscriptionConnectionMinimumIdleSize: 1
slaveSubscriptionConnectionPoolSize: 50
slaveConnectionMinimumIdleSize: 32
slaveConnectionPoolSize: 64
masterConnectionMinimumIdleSize: 32
masterConnectionPoolSize: 64
readMode: "SLAVE"
nodeAddresses:
- "redis://127.0.0.1:7004"
- "redis://127.0.0.1:7001"
- "redis://127.0.0.1:7000"
scanInterval: 1000
threads: 0
nettyThreads: 0
codec: !<org.redisson.codec.JsonJacksonCodec> {}
"transportMode":"NIO"
3.接口调用
RedissonClient client = Redisson.create(config); RAtomicLong longObject = client.getAtomicLong(‘myLong‘); // 同步执行方式 longObject.compareAndSet(3, 401); // 异步执行方式 RFuture<Boolean> result = longObject.compareAndSetAsync(3, 401); RedissonReactiveClient client = Redisson.createReactive(config); RAtomicLongReactive longObject = client.getAtomicLong(‘myLong‘); // 异步流执行方式 Mono<Boolean> result = longObject.compareAndSet(3, 401); RedissonRxClient client = Redisson.createRx(config); RAtomicLongRx longObject= client.getAtomicLong("myLong"); // RxJava2方式 Flowable<Boolean result = longObject.compareAndSet(3, 401);
4.分布式对象
在最顶层,可以通过keys函数来获取系统内所有的key
RKeys keys = redisson.getKeys(); Iterable<String> allKeys = keys.getKeys(); Iterable<String> foundedKeys = keys.getKeysByPattern(‘key*‘); long numOfDeletedKeys = keys.delete("obj1", "obj2", "obj3"); long deletedKeysAmount = keys.deleteByPattern("test?"); String randomKey = keys.randomKey(); long keysAmount = keys.count();
1).通用对象桶
RBucket可以存储任何对象,提供了同步和异步的两种方式
RBucket<AnyObject> bucket = redisson.getBucket("anyObject"); bucket.set(new AnyObject(1)); AnyObject obj = bucket.get(); bucket.trySet(new AnyObject(3)); bucket.compareAndSet(new AnyObject(4), new AnyObject(5)); bucket.getAndSet(new AnyObject(6));
2).二进制流
同时提供了InputStream
接口和OutputStream
接口的实现。流的最大容量受Redis主节点的内存大小限制。
RBinaryStream stream = redisson.getBinaryStream("anyStream"); byte[] content = ... stream.set(content); InputStream is = stream.getInputStream(); byte[] readBuffer = new byte[512]; is.read(readBuffer); OutputStream os = stream.getOuputStream(); byte[] contentToWrite = ... os.write(contentToWrite);
3).Geo
Redisson的分布式RGeo Java对象是一种专门用来储存与地理位置有关的对象桶。除了同步接口外,还提供了异步(Async)、反射式(Reactive)和RxJava2标准的接口。
RGeo<String> geo = redisson.getGeo("test"); geo.add(new GeoEntry(13.361389, 38.115556, "Palermo"), new GeoEntry(15.087269, 37.502669, "Catania")); geo.addAsync(37.618423, 55.751244, "Moscow"); Double distance = geo.dist("Palermo", "Catania", GeoUnit.METERS); geo.hashAsync("Palermo", "Catania"); Map<String, GeoPosition> positions = geo.pos("test2", "Palermo", "test3", "Catania", "test1"); List<String> cities = geo.radius(15, 37, 200, GeoUnit.KILOMETERS); Map<String, GeoPosition> citiesWithPositions = geo.radiusWithPosition(15, 37, 200, GeoUnit.KILOMETERS);
4).bitset
Redisson的分布式RBitSetJava对象采用了与java.util.BiteSet类似结构的设计风格。可以理解为它是一个分布式的可伸缩式位向量。需要注意的是RBitSet的大小受Redis限制,最大长度为4 294 967 295。除了同步接口外,还提供了异步(Async)、反射式(Reactive)和RxJava2标准的接口。
RBitSet set = redisson.getBitSet("simpleBitset"); set.set(0, true); set.set(1812, false); set.clear(0); set.addAsync("e"); set.xor("anotherBitset");
数据切片
RClusteredBitSet set = redisson.getClusteredBitSet("simpleBitset"); set.set(0, true); set.set(1812, false); set.clear(0); set.addAsync("e"); set.xor("anotherBitset");
5).AtomicLong
RAtomicLong atomicLong = redisson.getAtomicLong("myAtomicLong"); atomicLong.set(3); atomicLong.incrementAndGet(); atomicLong.get();
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