配置
spring:
redis:
host: 127.0.0.1
port: 6379
password:
lettuce:
pool:
max-active: 32
max-wait: 300
max-idle: 16
min-idle: 8
database: 0
local-redis:
host: 127.0.0.1
port: 6379
database: 0
password:
lettuce:
pool:
max-active: 16
max-wait: 100
max-idle: 8
min-idle: 4
对应的配置类，采用Lettuce，基本设置如下，套路都差不多，先读取配置，初始化ConnectionFactory，然后创建RedisTemplate实例，设置连接工厂
@Configuration
public class RedisAutoConfig {
@Bean
public LettuceConnectionFactory defaultLettuceConnectionFactory(RedisStandaloneConfiguration defaultRedisConfig,
GenericObjectPoolConfig defaultPoolConfig) {
LettuceClientConfiguration clientConfig =
LettucePoolingClientConfiguration.builder().commandTimeout(Duration.ofMillis(100))
.poolConfig(defaultPoolConfig).build();
return new LettuceConnectionFactory(defaultRedisConfig, clientConfig);
}
@Bean
public RedisTemplate<String, String> defaultRedisTemplate(
LettuceConnectionFactory defaultLettuceConnectionFactory) {
RedisTemplate<String, String> redisTemplate = new RedisTemplate<>();
redisTemplate.setConnectionFactory(defaultLettuceConnectionFactory);
redisTemplate.afterPropertiesSet();
return redisTemplate;
}
@Bean
@ConditionalOnBean(name = "localRedisConfig")
public LettuceConnectionFactory localLettuceConnectionFactory(RedisStandaloneConfiguration localRedisConfig,
GenericObjectPoolConfig localPoolConfig) {
LettuceClientConfiguration clientConfig =
LettucePoolingClientConfiguration.builder().commandTimeout(Duration.ofMillis(100))
.poolConfig(localPoolConfig).build();
return new LettuceConnectionFactory(localRedisConfig, clientConfig);
}
@Bean
@ConditionalOnBean(name = "localLettuceConnectionFactory")
public RedisTemplate<String, String> localRedisTemplate(LettuceConnectionFactory localLettuceConnectionFactory) {
RedisTemplate<String, String> redisTemplate = new RedisTemplate<>();
redisTemplate.setConnectionFactory(localLettuceConnectionFactory);
redisTemplate.afterPropertiesSet();
return redisTemplate;
}
@Configuration
@ConditionalOnProperty(name = "host", prefix = "spring.local-redis")
public static class LocalRedisConfig {
@Value("${spring.local-redis.host:127.0.0.1}")
private String host;
@Value("${spring.local-redis.port:6379}")
private Integer port;
@Value("${spring.local-redis.password:}")
private String password;
@Value("${spring.local-redis.database:0}")
private Integer database;
@Value("${spring.local-redis.lettuce.pool.max-active:8}")
private Integer maxActive;
@Value("${spring.local-redis.lettuce.pool.max-idle:8}")
private Integer maxIdle;
@Value("${spring.local-redis.lettuce.pool.max-wait:-1}")
private Long maxWait;
@Value("${spring.local-redis.lettuce.pool.min-idle:0}")
private Integer minIdle;
@Bean
public GenericObjectPoolConfig localPoolConfig() {
GenericObjectPoolConfig config = new GenericObjectPoolConfig();
config.setMaxTotal(maxActive);
config.setMaxIdle(maxIdle);
config.setMinIdle(minIdle);
config.setMaxWaitMillis(maxWait);
return config;
}
@Bean
public RedisStandaloneConfiguration localRedisConfig() {
RedisStandaloneConfiguration config = new RedisStandaloneConfiguration();
config.setHostName(host);
config.setPassword(RedisPassword.of(password));
config.setPort(port);
config.setDatabase(database);
return config;
}
}
@Configuration
public static class DefaultRedisConfig {
@Value("${spring.redis.host:127.0.0.1}")
private String host;
@Value("${spring.redis.port:6379}")
private Integer port;
@Value("${spring.redis.password:}")
private String password;
@Value("${spring.redis.database:0}")
private Integer database;
@Value("${spring.redis.lettuce.pool.max-active:8}")
private Integer maxActive;
@Value("${spring.redis.lettuce.pool.max-idle:8}")
private Integer maxIdle;
@Value("${spring.redis.lettuce.pool.max-wait:-1}")
private Long maxWait;
@Value("${spring.redis.lettuce.pool.min-idle:0}")
private Integer minIdle;
@Bean
public GenericObjectPoolConfig defaultPoolConfig() {
GenericObjectPoolConfig config = new GenericObjectPoolConfig();
config.setMaxTotal(maxActive);
config.setMaxIdle(maxIdle);
config.setMinIdle(minIdle);
config.setMaxWaitMillis(maxWait);
return config;
}
@Bean
public RedisStandaloneConfiguration defaultRedisConfig() {
RedisStandaloneConfiguration config = new RedisStandaloneConfiguration();
config.setHostName(host);
config.setPassword(RedisPassword.of(password));
config.setPort(port);
config.setDatabase(database);
return config;
}
}
}
测试类如下，简单的演示下两个template的读写
@SpringBootApplication
public class Application {
public Application(RedisTemplate<String, String> localRedisTemplate, RedisTemplate<String, String>
defaultRedisTemplate)
throws InterruptedException {
// 10s的有效时间
localRedisTemplate.delete("key");
localRedisTemplate.opsForValue().set("key", "value", 100, TimeUnit.MILLISECONDS);
String ans = localRedisTemplate.opsForValue().get("key");
System.out.println("value".equals(ans));
TimeUnit.MILLISECONDS.sleep(200);
ans = localRedisTemplate.opsForValue().get("key");
System.out.println("value".equals(ans) + " >> false ans should be null! ans=[" + ans + "]");
defaultRedisTemplate.opsForValue().set("key", "value", 100, TimeUnit.MILLISECONDS);
ans = defaultRedisTemplate.opsForValue().get("key");
System.out.println(ans);
}
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
代码执行演示如下
上面的演示为动图，抓一下重点：
- 注意 localRedisTemplate, defaultRedisTemplate 两个对象不相同（看debug窗口后面的@xxx)
- 同样两个RedisTemplate的ConnectionFactory也是两个不同的实例（即分别对应前面配置类中的两个Factory)
- 执行后输出的结果正如我们预期的redis操作
塞值，马上取出没问题
失效后，再查询，返回null
- 最后输出异常日志，提示如下
Description:
Parameter 0 of method redisTemplate in org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration required a single bean, but 2 were found:
- defaultLettuceConnectionFactory: defined by method 'defaultLettuceConnectionFactory' in class path resource [com/git/hui/boot/redis/config/RedisAutoConfig.class]
- localLettuceConnectionFactory: defined by method 'localLettuceConnectionFactory' in class path resource [com/git/hui/boot/redis/config/RedisAutoConfig.class]
Action:
Consider marking one of the beans as @Primary, updating the consumer to accept multiple beans, or using @Qualifier to identify the bean that should be consumed
上面表示说有多个ConnectionFactory存在，然后创建默认的RedisTemplate就不知道该选择哪一个了，有两种方法
方法一：指定默认的ConnectionFactory
借助@Primary来指定默认的连接工厂，然后在使用工程的时候，通过@Qualifier注解来显示指定，我需要的工厂是哪个（主要是localRedisTemplate这个bean的定义，如果不加，则会根据defaultLettuceConnectionFactory这个实例来创建Redis连接了）
@Bean
@Primary
public LettuceConnectionFactory defaultLettuceConnectionFactory(RedisStandaloneConfiguration defaultRedisConfig,
GenericObjectPoolConfig defaultPoolConfig) {
// ...
}
@Bean
public RedisTemplate<String, String> defaultRedisTemplate(
@Qualifier("defaultLettuceConnectionFactory") LettuceConnectionFactory defaultLettuceConnectionFactory) {
// ....
}
@Bean
@ConditionalOnBean(name = "localRedisConfig")
public LettuceConnectionFactory localLettuceConnectionFactory(RedisStandaloneConfiguration localRedisConfig,
GenericObjectPoolConfig localPoolConfig) {
// ...
}
@Bean
@ConditionalOnBean(name = "localLettuceConnectionFactory")
public RedisTemplate<String, String> localRedisTemplate(
@Qualifier("localLettuceConnectionFactory") LettuceConnectionFactory localLettuceConnectionFactory) {
// ...
}
方法二：忽略默认的自动配置类
既然提示的是org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration类加载bean冲突，那么就不加载这个配置即可
@SpringBootApplication
@EnableAutoConfiguration(exclude = {RedisAutoConfiguration.class, RedisReactiveAutoConfiguration.class})
public class Application {
// ...
}