前言
在实际springboot集成redis使用过程中，针对不同类型的业务数据，可能存在不同的dbindex中，例如token存储db0，redis全局锁存储dbindex1，需要我们对RedisTemplate操作进行扩展，支持单次操作不同的dbindex
方案
系统加载时初始化根据redis使用库的dbindex，初始化对应个数的RedisTemplate，调用时根据dbindex获取对应的操作对象实例，本次实现是将15个db全部初始化
RedisRegist
初始化redis的Factory，线程池配置及RedisTemplate，StringRedisTemplate的Bean对象
代码语言：javascript复制public class RedisRegist implements EnvironmentAware,ImportBeanDefinitionRegistrar {
private static final Logger logger = LoggerFactory.getLogger(RedisRegist.class);
private static Map<String, Object> registerBean = new ConcurrentHashMap<>();
private Environment environment;
private Binder binder;
@Override
public void setEnvironment(Environment environment) {
this.environment = environment;
this.binder = Binder.get(this.environment);
}
@Override
public void registerBeanDefinitions(AnnotationMetadata importingClassMetadata, BeanDefinitionRegistry registry) {
RedisEntity redisEntity;
try {
redisEntity = binder.bind("spring.redis", RedisEntity.class).get();
} catch (NoSuchElementException e) {
logger.error("redis not setting.");
return;
}
boolean onPrimary = true;
//根据多个库实例化出多个连接池和Template
for (int i = 0; i < 15; i ) {
int database = i;
//单机模式
RedisStandaloneConfiguration configuration = new RedisStandaloneConfiguration();
configuration.setHostName(String.valueOf(redisEntity.getHost()));
configuration.setPort(Integer.parseInt(String.valueOf(redisEntity.getPort())));
configuration.setDatabase(database);
String password = redisEntity.getPassword();
if (password != null && !"".equals(password)) {
RedisPassword redisPassword = RedisPassword.of(password);
configuration.setPassword(redisPassword);
}
//池配置
GenericObjectPoolConfig genericObjectPoolConfig = new GenericObjectPoolConfig();
RedisProperties.Pool pool = redisEntity.getLettuce().getPoolEntity();
genericObjectPoolConfig.setMaxIdle(pool.getMaxIdle());
genericObjectPoolConfig.setMaxTotal(pool.getMaxActive());
genericObjectPoolConfig.setMinIdle(pool.getMinIdle());
if (pool.getMaxWait() != null) {
genericObjectPoolConfig.setMaxWaitMillis(pool.getMaxWait().toMillis());
}
Supplier<LettuceConnectionFactory> lettuceConnectionFactorySupplier = () -> {
LettuceConnectionFactory factory = (LettuceConnectionFactory) registerBean.get("LettuceConnectionFactory" database);
if (factory != null) {
return factory;
}
LettucePoolingClientConfiguration.LettucePoolingClientConfigurationBuilder builder = LettucePoolingClientConfiguration.builder();
Duration shutdownTimeout = redisEntity.getLettuce().getShutdownTimeout();
if(shutdownTimeout == null){
shutdownTimeout = redisEntity.getTimeout();
}
if (shutdownTimeout != null) {
builder.shutdownTimeout(shutdownTimeout);
}
LettuceClientConfiguration clientConfiguration = builder.poolConfig(genericObjectPoolConfig).build();
factory = new LettuceConnectionFactory(configuration, clientConfiguration);
registerBean.put("LettuceConnectionFactory" database, factory);
return factory;
};
LettuceConnectionFactory lettuceConnectionFactory = lettuceConnectionFactorySupplier.get();
BeanDefinitionBuilder builder = BeanDefinitionBuilder.genericBeanDefinition(LettuceConnectionFactory.class, lettuceConnectionFactorySupplier);
AbstractBeanDefinition factoryBean = builder.getRawBeanDefinition();
factoryBean.setPrimary(onPrimary);
registry.registerBeanDefinition("lettuceConnectionFactory" database, factoryBean);
// StringRedisTemplate
GenericBeanDefinition stringRedisTemplate = new GenericBeanDefinition();
stringRedisTemplate.setBeanClass(StringRedisTemplate.class);
ConstructorArgumentValues constructorArgumentValues = new ConstructorArgumentValues();
constructorArgumentValues.addIndexedArgumentValue(0, lettuceConnectionFactory);
stringRedisTemplate.setConstructorArgumentValues(constructorArgumentValues);
stringRedisTemplate.setAutowireMode(AutowireCapableBeanFactory.AUTOWIRE_BY_NAME);
registry.registerBeanDefinition("stringRedisTemplate" database, stringRedisTemplate);
// 定义RedisTemplate对象
GenericBeanDefinition redisTemplate = new GenericBeanDefinition();
redisTemplate.setBeanClass(RedisTemplate.class);
redisTemplate.getPropertyValues().add("connectionFactory", lettuceConnectionFactory);
redisTemplate.setAutowireMode(AutowireCapableBeanFactory.AUTOWIRE_BY_NAME);
RedisSerializer stringSerializer = new StringRedisSerializer();
Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
// key采用String的序列化方式，value采用json序列化方式
redisTemplate.getPropertyValues().add("keySerializer",new StringRedisSerializer());
redisTemplate.getPropertyValues().add("hashKeySerializer",stringSerializer);
redisTemplate.getPropertyValues().add("valueSerializer",jackson2JsonRedisSerializer);
redisTemplate.getPropertyValues().add("hashValueSerializer",stringSerializer);
//注册Bean
registry.registerBeanDefinition("redisTemplate" database, redisTemplate);
//logger.info("Registration redis ({}) !", database);
if (onPrimary) {
onPrimary = false;
}
}
}
}RedisManage
RedisTemplate，StringRedisTemplate的Bean对象统一管理定义
代码语言：javascript复制public class RedisManage {
private Map<String, RedisTemplate> redisTemplateMap;
private Map<String, StringRedisTemplate> stringRedisTemplateMap;
public RedisManage(Map<String, RedisTemplate> redisTemplateMap,
Map<String, StringRedisTemplate> stringRedisTemplateMap) {
this.redisTemplateMap = redisTemplateMap;
this.stringRedisTemplateMap = stringRedisTemplateMap;
}
public RedisTemplate redisTemplate(int dbIndex) {
RedisTemplate redisTemplate = redisTemplateMap.get("redisTemplate" dbIndex);
return redisTemplate;
}
public StringRedisTemplate stringRedisTemplate(int dbIndex) {
StringRedisTemplate stringRedisTemplate = stringRedisTemplateMap.get("stringRedisTemplate" dbIndex);
stringRedisTemplate.setEnableTransactionSupport(true);
return stringRedisTemplate;
}
public Map<String, RedisTemplate> getRedisTemplateMap() {
return redisTemplateMap;
}
public Map<String, StringRedisTemplate> getStringRedisTemplateMap() {
return stringRedisTemplateMap;
}
}RedisConfig
将操作类Bean对象注入道RedisManage中
代码语言：javascript复制@AutoConfigureBefore({RedisAutoConfiguration.class})
@Import(RedisRegist.class)
@Configuration
public class RedisConfig implements EnvironmentAware, ApplicationContextAware {
private static final Logger logger = LoggerFactory.getLogger(RedisConfig.class);
private static String key1 = "redisTemplate";
private static String key2 = "stringRedisTemplate";
Map<String, RedisTemplate> redisTemplateMap = new HashMap<>();
Map<String, StringRedisTemplate> stringRedisTemplateMap = new HashMap<>();
private Binder binder;
private Environment environment;
private ApplicationContext applicationContext;
@Override
public void setEnvironment(Environment environment) {
this.environment = environment;
this.binder = Binder.get(this.environment);
}
@PostConstruct
public Map<String,RedisTemplate> initRedisTemplate(){
RedisEntity redisEntity;
try {
redisEntity = binder.bind("spring.redis", RedisEntity.class).get();
} catch (NoSuchElementException e) {
throw new RuntimeException("Failed to configure spring.redis: 'spring.redis' attribute is not specified and no embedded redis could be configured.");
}
for (int i=0;i<15;i ){
int database = i;
String key = key1 database;
RedisTemplate redisTemplate = applicationContext.getBean(key , RedisTemplate.class);
if(redisTemplate != null){
redisTemplateMap.put(key , redisTemplate);
}
key = key2 database;
if(stringRedisTemplateMap != null){
StringRedisTemplate stringRedisTemplate = applicationContext.getBean(key , StringRedisTemplate.class);
stringRedisTemplateMap.put(key , stringRedisTemplate);
}
}
if(redisTemplateMap.size() == 0 && stringRedisTemplateMap.size() == 0){
throw new RuntimeException("load redisTemplate failure , please check spring.redis property config！！！");
}
return redisTemplateMap;
}
@Override
public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
this.applicationContext = applicationContext;
}
@Bean
public RedisManage redisManage(){
return new RedisManage(redisTemplateMap , stringRedisTemplateMap);
}
}RedisUtil
调用RedisManage封装具体相关操作调用
代码语言：javascript复制@Component
public class RedisUtil {
@Autowired
private RedisManage redisManage;
private int defatuDBIndex= 0;
public void redisTemplateSet(String key, Object value){
ValueOperations<Object, Object> ops = redisManage.redisTemplate(defatuDBIndex).opsForValue();
ops.set(key, value);
}
public void redisTemplateSet(String key, Object value,int dbIndex){
ValueOperations<Object, Object> ops = redisManage.redisTemplate(dbIndex).opsForValue();
ops.set(key, value);
}
public Object redisTemplateGet(String key){
ValueOperations<Object, Object> ops = redisManage.redisTemplate(defatuDBIndex).opsForValue();
return ops.get(key);
}
public Object redisTemplateGet(String key,int dbIndex){
ValueOperations<Object, Object> ops = redisManage.redisTemplate(dbIndex).opsForValue();
return ops.get(key);
}
public void redisTemplateRemove(String key){
ValueOperations<Object, Object> ops = redisManage.redisTemplate(defatuDBIndex).opsForValue();
ops.getOperations().delete(key);
}
public void redisTemplateRemove(String key,int dbIndex){
ValueOperations<Object, Object> ops = redisManage.redisTemplate(dbIndex).opsForValue();
ops.getOperations().delete(key);
}
public void redisTemplateSetForList(String key, Map<String,Object> map){
HashOperations<Object, Object,Object> ops = redisManage.redisTemplate(defatuDBIndex).opsForHash();
ops.putAll(key,map);
}
public void redisTemplateSetForList(String key, Map<String,Object> map,int dbIndex){
HashOperations<Object, Object,Object> ops = redisManage.redisTemplate(dbIndex).opsForHash();
ops.putAll(key,map);
}
public void redisTemplateSetForList(String key, String hashKey,Object value){
HashOperations<Object, Object,Object> ops = redisManage.redisTemplate(defatuDBIndex).opsForHash();
ops.put(key,hashKey,value);
}
public void redisTemplateSetForList(String key, String hashKey,Object value,int dbIndex){
HashOperations<Object, Object,Object> ops = redisManage.redisTemplate(dbIndex).opsForHash();
ops.put(key,hashKey,value);
}
public Map<Object, Object> redisTemplateGetForList(String key){
HashOperations<Object, Object,Object> ops = redisManage.redisTemplate(defatuDBIndex).opsForHash();
return ops.entries(key);
}
public Map<Object, Object> redisTemplateGetForList(String key,int dbIndex){
HashOperations<Object, Object,Object> ops = redisManage.redisTemplate(dbIndex).opsForHash();
return ops.entries(key);
}
public Object redisTemplateGetForList(String key,String hasKey){
HashOperations<Object, Object,Object> ops = redisManage.redisTemplate(defatuDBIndex).opsForHash();
return ops.get(key,hasKey);
}
public Object redisTemplateGetForList(String key,String hasKey,int dbIndex){
HashOperations<Object, Object,Object> ops = redisManage.redisTemplate(dbIndex).opsForHash();
return ops.get(key,hasKey);
}
public void setExpire(String key,long timeout, final TimeUnit unit,int dbIndex){
redisManage.redisTemplate(dbIndex).expire(key,timeout, unit);
}
public void setExpire(String key,long timeout, final TimeUnit unit){
redisManage.redisTemplate(defatuDBIndex).expire(key,timeout, unit);
}
public boolean isValid(String key){
boolean flag = false;
if( redisManage.redisTemplate(defatuDBIndex).hasKey(key)){
if( redisManage.redisTemplate(defatuDBIndex).getExpire(key,TimeUnit.SECONDS)>0){
flag = true;
}
}
return flag;
}
public boolean isValid(String key,int dbIndex){
boolean flag = false;
if( redisManage.redisTemplate(dbIndex).hasKey(key)){
if( redisManage.redisTemplate(dbIndex).getExpire(key,TimeUnit.SECONDS)>0){
flag = true;
}
}
return flag;
}
}
