Redis之Java調用哨兵

    最近在使用Redis，記錄下。

1.加入依賴

    List-1  只是給出與Redis有關的依賴，其它的spring依賴就略

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-redis</artifactId>
    <version>1.8.14.RELEASE</version>
</dependency>
<dependency>
    <groupId>redis.clients</groupId>
    <artifactId>jedis</artifactId>
    <version>2.9.0</version>
</dependency>

2.spring的xml配置

2.1 哨兵配置

    List-2 如何搭建哨兵機制的集羣，在此處就略，不描述了

<bean id="redisSentinelConfiguration" class="org.springframework.data.redis.connection.RedisSentinelConfiguration">
    <constructor-arg name="master" value="mymaster"/>
    <constructor-arg name="sentinelHostAndPorts">
        <set>
            <value>192.168.0.107:26481</value>
            <value>192.168.0.107:26482</value>
            <value>192.168.0.107:26483</value>
        </set>
    </constructor-arg>
</bean>

2.2 池pool配置

    List-3

<bean id="pool" class="redis.clients.jedis.JedisPoolConfig">
    <property name="maxTotal" value="30"/>
    <property name="maxIdle" value="10"/>
    <property name="minEvictableIdleTimeMillis" value="100000"/>
    <property name="numTestsPerEvictionRun" value="1024"/>
</bean>

2.3 工廠Factory配置

    List-4

<bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
    <constructor-arg name="sentinelConfig" ref="redisSentinelConfiguration"/>
    <constructor-arg name="poolConfig" ref="pool"/>
    <property name="hostName" value="localhost"/>
    <property name="port" value="6379"/>
    <property name="database" value="7"/>
</bean>

2.4 redisTemplate配置

    List-5

<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate">
    <property name="connectionFactory" ref="jedisConnectionFactory"/>
    <property name="keySerializer">
        <bean class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"/>
    </property>
    <property name="valueSerializer">
        <bean class="org.springframework.data.redis.serializer.JdkSerializationRedisSerializer"/>
    </property>
</bean>

3. 測試

3.1 Redis緩存對象

    List-6

/**
 * @author dmj1161859184@126.com 2018-08-23 23:01
 * @version 1.0
 * @since 1.0
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"classpath*:spring.xml"})
public class MyRedisTestBase {

}

    List-7 因爲咱們使用了JDK的Serializable做爲序列化，因此對象必定要實現Serializable接口，否則會報錯的

/**
 * @author dmj1161859184@126.com 2018-09-12 20:51
 * @version 1.0
 * @since 1.0
 */
public class SerializableRedisTemplate extends MyRedisTestBase {
    @Autowired
    private RedisTemplate<Serializable, Serializable> redisTemplate;

    @Test
    public void test1() {
        Address address = new Address();
        address.setCode(getRandomUUID());
        address.setName(getRandomUUID());

        Person person = new Person();
        person.setAge(12);
        person.setName("mjduan");
        person.setAddresses(Arrays.asList(address));

        redisTemplate.opsForValue().set(person.getName(), person);

        Serializable serializable = redisTemplate.opsForValue().get(person.getName());
        Person newPerson = (Person) serializable;
        System.out.println(newPerson);
    }
     
    private String getRandomUUID() {
        return UUID.randomUUID().toString();
    }    
}

3.2 config set

    List-8 設置maxmemory的值

@Test
    public void test2() {
        RedisConnection connection = redisTemplate.getConnectionFactory().getConnection();
        //maxmemory的值，單位最好是bytes，由於redis.conf裏面就有註釋
        connection.setConfig("maxmemory", "1mb");

        List<String> maxmemory = connection.getConfig("maxmemory");
        assertEquals(2, maxmemory.size());
        assertEquals(1L * 1024 * 1024, Long.valueOf(maxmemory.get(1)).longValue());
    }

    在redis命令裏面查看結果，以下List-9:

    List-9 能夠看到List-8中設置的1mb生效了，1*1024*1024=1048576

127.0.0.1:6379[1]> config get maxmemory
1) "maxmemory"
2) "1048576"
127.0.0.1:6379[1]> config get maxmemory
1) "maxmemory"
2) "1048576"
127.0.0.1:6379[1]> select 7
OK
127.0.0.1:6379[7]> config get maxmemory
1) "maxmemory"
2) "1048576"
127.0.0.1:6379[7]>

    如List-9中所示，咱們雖然在List-4中設置的database是7，可是從List-9中能夠看出，經過config set設置的值是全局生效了。在database7中獲得的maxmemory是1048576，在database1中獲得的maxmemory也是1048576。