Redis多数据源常见的场景:
目前在网上的一些解决方案无法完全满足特定需求,例如不支持动态添加或更新数据源、缺乏数据源的负载均衡功能,或者不能开箱即用需要自行封装一些常用方法。
为了解决这些问题,封装了一个轻量级的Redis多数据源库,已在生产环境中长时间稳定运行。现分享出来,希望这个库能对你的项目有所帮助。
https://github.com/codebaorg/redis-keeper
如果这篇文章帮助到了你,欢迎star一下,感谢你的支持。
org.redisson
redisson
3.15.5
provided
org.codeba
redis-keeper-spring-boot-starter
2024.0.0
redis-keeper:
redis:
datasource:
ds1: // 此处的命名可以随便取,但是要保证唯一不重复
host: localhost
port: 6379
database: 0
password: yourPass
ds2: // 此处的命名可以随便取,但是要保证唯一不重复
host: localhost
port: 6379
database: 0
password: yourPass
方式一:通过CacheTemplateProvider获取cacheTemplate,示例如下:
public class AppTest {
@Autowired
private CacheTemplateProvider provider;
public void test() {
final Optional templateOptional = provider.getTemplate("ds1");
if (templateOptional.isPresent()) {
final CacheTemplate cacheTemplate = templateOptional.get();
String key = "foo";
String value = "bar";
cacheTemplate.set(key, value);
}
}
}
方式二:通过代理类CacheTemplateProxy获取cacheTemplate,示例如下:
public class AppTest {
private final CacheTemplate cacheTemplate = CacheTemplateProxy.asTemplate("ds1");
public void test() {
String key = "foo";
String value = "bar";
cacheTemplate.set(key, value);
}
}
需要:spring cloud + nacos
现有的数据源配置示例如下:
redis-keeper:
redis:
datasource:
ds1:
host: localhost
port: 6379
database: 10
password: xxx
invoke-params-print: true
测试方法:
@RestController
@RequiredArgsConstructor
public class TestController {
private final CacheTemplateProvider provider;
@RequestMapping("/test")
public void testRefresh() {
final Optional templateOptional = provider.getTemplate("ds1");
templateOptional.ifPresent(cacheTemplate -> {
cacheTemplate.set("foo", "bar");
cacheTemplate.del("foo");
});
}
}
访问上面的方法,日志打印如下(可以看到写入的redis库是10库):
2024-03-12T11:33:37.850+08:00 INFO 62914 --- [nio-8000-exec-1] o.c.r.k.support.DefaultRedissonTemplate : cmd:set, params:[foo, bar], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=10}]
2024-03-12T11:33:37.858+08:00 INFO 62914 --- [nio-8000-exec-1] o.c.r.k.support.DefaultRedissonTemplate : cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=10}]
修改数据源配置,比如修改库为0库,此时可以看到nacos配置实时更新日志:
2024-03-12T11:43:51.683+08:00 INFO 62914 --- [r-localhost-216] com.alibaba.nacocnblogs.common.remote.client : [6253dca3-136e-4ac1-b894-fb4c11483703_config-0] Receive server push request, request = ConfigChangeNotifyRequest, requestId = 1
2024-03-12T11:43:51.683+08:00 INFO 62914 --- [r-localhost-216] c.a.n.client.config.impl.ClientWorker : [6253dca3-136e-4ac1-b894-fb4c11483703_config-0] [server-push] config changed. dataId=redis-keeper-demo.yaml, group=DEFAULT_GROUP,tenant=null
2024-03-12T11:43:51.684+08:00 INFO 62914 --- [r-localhost-216] com.alibaba.nacocnblogs.common.remote.client : [6253dca3-136e-4ac1-b894-fb4c11483703_config-0] Ack server push request, request = ConfigChangeNotifyRequest, requestId = 1
2024-03-12T11:43:51.700+08:00 INFO 62914 --- [s.client.Worker] c.a.n.client.config.impl.ClientWorker : [fixed-localhost_8848] [data-received] dataId=redis-keeper-demo.yaml, group=DEFAULT_GROUP, tenant=, md5=dddd513021564c6d6322e18783ac4f2b, content=server:
redis-keeper:
redis:
datasource:
ds1:
host: localhost
..., type=yaml
2024-03-12T11:43:51.701+08:00 INFO 62914 --- [s.client.Worker] c.a.nacos.client.config.impl.CacheData : [fixed-localhost_8848] [notify-listener] time cost=0ms in ClientWorker, dataId=redis-keeper-demo.yaml, group=DEFAULT_GROUP, md5=dddd513021564c6d6322e18783ac4f2b, listener=com.alibaba.cloud.nacos.refresh.NacosContextRefresher$1@178412d1
2024-03-12T11:43:51.701+08:00 INFO 62914 --- [ternal.notifier] c.a.nacos.client.config.impl.CacheData : [fixed-localhost_8848] [notify-context] dataId=redis-keeper-demo.yaml, group=DEFAULT_GROUP, md5=dddd513021564c6d6322e18783ac4f2b
2024-03-12T11:43:51.915+08:00 INFO 62914 --- [ternal.notifier] c.a.c.n.c.NacosConfigDataLoader : [Nacos Config] Load config[dataId=redis-keeper-demo.yaml, group=DEFAULT_GROUP] success
2024-03-12T11:43:51.950+08:00 INFO 62914 --- [ternal.notifier] o.s.c.e.event.RefreshEventListener : Refresh keys changed: [redis-keeper.redis.datasource.ds1.database]
2024-03-12T11:43:51.950+08:00 INFO 62914 --- [ternal.notifier] c.a.nacos.client.config.impl.CacheData : [fixed-localhost_8848] [notify-ok] dataId=redis-keeper-demo.yaml, group=DEFAULT_GROUP, md5=dddd513021564c6d6322e18783ac4f2b, listener=com.alibaba.cloud.nacos.refresh.NacosContextRefresher$1@178412d1 ,cost=249 millis.
再次访问上面的方法,日志打印如下(可以看到写入的redis库是0库):
2024-03-12T11:46:11.849+08:00 INFO 62914 --- [nio-8000-exec-4] o.c.r.k.support.DefaultRedissonTemplate : cmd:set, params:[foo, bar], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=0}]
2024-03-12T11:46:11.861+08:00 INFO 62914 --- [nio-8000-exec-4] o.c.r.k.support.DefaultRedissonTemplate : cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=0}]
有的业务场景需要多套redis集群,来承接同一业务的流量,起到分流的作用,这时就需要从多个数据源中获取其中的某一个进行redis的读写。
负载均衡的算法目前支持两种:轮询、随机。
redis多数据源配置,示例如下:
注意:只有 redis-keeper.redis.datasources 或者 redis-keeper.redisson.datasources 配置下的多数据源支持负载均衡。
redis-keeper:
redis:
datasources:
ds2:
- host: localhost
port: 6379
database: 1
password: xxx
invoke-params-print: true
- host: localhost
port: 6379
database: 2
password: xxx
invoke-params-print: true
- host: localhost
port: 6379
database: 3
password: xxx
invoke-params-print: true
public class AppTest {
@Autowired
private CacheTemplateProvider provider;
public void testPollTemplate() {
String key = "foo";
for (int i = 1; i templateOptional = provider.pollTemplate("ds2");
if (templateOptional.isPresent()) {
final CacheTemplate template = templateOptional.get();
final String str = String.valueOf(i);
template.set(key, str);
template.get(key).ifPresent(el -> {
assert str.equals(el);
});
template.del(key);
}
}
}
}
日志打印结果,可以看到配置的redis数据源的出现的次数是相近的:
2024-03-12 12:15:15.614 INFO 67575 --- [main] : cmd:set, params:[foo, 1], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=1}]
2024-03-12 12:15:15.621 INFO 67575 --- [main] : cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=1}]
2024-03-12 12:15:15.624 INFO 67575 --- [main] : cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=1}]
2024-03-12 12:15:15.627 INFO 67575 --- [main] : cmd:set, params:[foo, 2], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=2}]
2024-03-12 12:15:15.629 INFO 67575 --- [main] : cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=2}]
2024-03-12 12:15:15.635 INFO 67575 --- [main] : cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=2}]
2024-03-12 12:15:15.635 INFO 67575 --- [main] : cmd:set, params:[foo, 3], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:15:15.636 INFO 67575 --- [main] : cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:15:15.638 INFO 67575 --- [main] : cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:15:15.639 INFO 67575 --- [main] : cmd:set, params:[foo, 4], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=1}]
2024-03-12 12:15:15.652 INFO 67575 --- [main] : cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=1}]
2024-03-12 12:15:15.653 INFO 67575 --- [main] : cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=1}]
2024-03-12 12:15:15.654 INFO 67575 --- [main] : cmd:set, params:[foo, 5], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=2}]
2024-03-12 12:15:15.655 INFO 67575 --- [main] : cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=2}]
2024-03-12 12:15:15.656 INFO 67575 --- [main] : cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=2}]
2024-03-12 12:15:15.656 INFO 67575 --- [main] : cmd:set, params:[foo, 6], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:15:15.658 INFO 67575 --- [main] : cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:15:15.658 INFO 67575 --- [main] : cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:15:15.659 INFO 67575 --- [main] : cmd:set, params:[foo, 7], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=1}]
2024-03-12 12:15:15.660 INFO 67575 --- [main] : cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=1}]
2024-03-12 12:15:15.661 INFO 67575 --- [main] : cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=1}]
2024-03-12 12:15:15.667 INFO 67575 --- [main] : cmd:set, params:[foo, 8], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=2}]
2024-03-12 12:15:15.669 INFO 67575 --- [main] : cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=2}]
2024-03-12 12:15:15.669 INFO 67575 --- [main] : cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=2}]
2024-03-12 12:15:15.670 INFO 67575 --- [main] : cmd:set, params:[foo, 9], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:15:15.672 INFO 67575 --- [main] : cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:15:15.673 INFO 67575 --- [main] : cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:15:15.674 INFO 67575 --- [main] : cmd:set, params:[foo, 10], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=1}]
2024-03-12 12:15:15.675 INFO 67575 --- [main] : cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=1}]
2024-03-12 12:15:15.676 INFO 67575 --- [main] : cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=1}]
public class AppTest {
@Autowired
private CacheTemplateProvider provider;
public void testRandomTemplate() {
String key = "foo";
for (int i = 1; i templateOptional = provider.randomTemplate("ds2");
if (templateOptional.isPresent()) {
final CacheTemplate template = templateOptional.get();
final String str = String.valueOf(i);
template.set(key, str);
template.get(key).ifPresent(el -> {
assert str.equals(el);
});
template.del(key);
}
}
}
}
日志打印结果,可以看到配置的redis数据源的出现的次数是随机的:
2024-03-12 12:05:06.450 INFO 66199 --- [main]: cmd:set, params:[foo, 1], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.457 INFO 66199 --- [main]: cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.461 INFO 66199 --- [main]: cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.464 INFO 66199 --- [main]: cmd:set, params:[foo, 2], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.465 INFO 66199 --- [main]: cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.467 INFO 66199 --- [main]: cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.468 INFO 66199 --- [main]: cmd:set, params:[foo, 3], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.469 INFO 66199 --- [main]: cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.470 INFO 66199 --- [main]: cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.472 INFO 66199 --- [main]: cmd:set, params:[foo, 4], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=2}]
2024-03-12 12:05:06.473 INFO 66199 --- [main]: cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=2}]
2024-03-12 12:05:06.475 INFO 66199 --- [main]: cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=2}]
2024-03-12 12:05:06.475 INFO 66199 --- [main]: cmd:set, params:[foo, 5], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=1}]
2024-03-12 12:05:06.476 INFO 66199 --- [main]: cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=1}]
2024-03-12 12:05:06.477 INFO 66199 --- [main]: cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=1}]
2024-03-12 12:05:06.478 INFO 66199 --- [main]: cmd:set, params:[foo, 6], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.479 INFO 66199 --- [main]: cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.481 INFO 66199 --- [main]: cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.482 INFO 66199 --- [main]: cmd:set, params:[foo, 7], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.484 INFO 66199 --- [main]: cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.485 INFO 66199 --- [main]: cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.486 INFO 66199 --- [main]: cmd:set, params:[foo, 8], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.488 INFO 66199 --- [main]: cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.489 INFO 66199 --- [main]: cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.491 INFO 66199 --- [main]: cmd:set, params:[foo, 9], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=2}]
2024-03-12 12:05:06.492 INFO 66199 --- [main]: cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=2}]
2024-03-12 12:05:06.493 INFO 66199 --- [main]: cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=2}]
2024-03-12 12:05:06.494 INFO 66199 --- [main]: cmd:set, params:[foo, 10], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.495 INFO 66199 --- [main]: cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
2024-03-12 12:05:06.496 INFO 66199 --- [main]: cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=3}]
默认情况下数据源的状态标识是读写,还有三个可配状态标识:只读、只写、跳过。
注意:此处的状态只是一种标识,用于筛选获取指定的数据源,并不用于控制redis的读写命令。
数据源配置如下:
redis-keeper:
redis:
datasource:
ds1:
host: localhost
port: 6379
database: 10
password: xxx
status: RW
invoke-params-print: true
测试方法:
public void testTemplateWithStatus() {
final Optional templateOptional = provider.getTemplate("ds1", CacheDatasourceStatus.RW);
if (templateOptional.isPresent()) {
final CacheTemplate cacheTemplate = templateOptional.get();
String key = "foo";
String value = "bar";
cacheTemplate.set(key, value);
final Optional
访问上面的方法,日志打印如下:
2024-03-12 14:28:34.183 INFO 77230 --- [main]: cmd:set, params:[foo, bar], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=0}]
2024-03-12 14:28:34.190 INFO 77230 --- [main]: cmd:get, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=0}]
2024-03-12 14:28:34.193 INFO 77230 --- [main]: cmd:del, params:[foo], connectionInfo:[SingleServer:{Address=redis://localhost:6379,Database=0}]
更多详细示例,请查看:https://github.com/codebaorg/redis-keeper/blob/main/README_zh.md
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