问题描述
项目需要自定义RedisConnectionFactory，发现问题:使用LettuceConnectionFactory时，runtime总是报java.lang.NullPointerException，而JedisConnectionFactory可以通过测试.我觉得LettuceConnectionFactory对redis和springboot有没有版本限制?
The project need a custom RedisConnectionFactory and finds a problem:when using LettuceConnectionFactory, the runtime always reports java.lang.NullPointerException, while JedisConnectionFactory can pass tests.I think that whether LettuceConnectionFactory have version restrictions on redis and springboot?
开发环境:
Springboot: 2.1.0.release
Springboot: 2.1.0.release
redis:3.2.8
redis:3.2.8
jdk8.
Java 代码
@Component
@Configuration
public class RedisConfig {
public LettuceConnectionFactory lettuceConnectionFactoryTest(){
return new LettuceConnectionFactory(new RedisStandaloneConfiguration("127.0.0.1", 6379));
}
public JedisConnectionFactory jedisConnectionFactoryTest(){
return new JedisConnectionFactory(new RedisStandaloneConfiguration("127.0.0.1", 6379));
}
}
测试代码
@Autowired
private RedisConfig redisConfig;
@Autowired
private StringRedisTemplate redisTemplate;
@Test
public void test(){
redisTemplate.setConnectionFactory(redisConfig.lettuceConnectionFactoryTest());
ValueOperations<String, String> valueOperations = redisTemplate.opsForValue();
valueOperations.set("test", "test123");
System.out.println(valueOperations.get("test"));
}
例外
java.lang.NullPointerException
at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$SharedConnection.getNativeConnection(LettuceConnectionFactory.java:1085)
at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory$SharedConnection.getConnection(LettuceConnectionFactory.java:1065)
at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory.getSharedConnection(LettuceConnectionFactory.java:865)
at org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory.getConnection(LettuceConnectionFactory.java:340)
at org.springframework.data.redis.core.RedisConnectionUtils.doGetConnection(RedisConnectionUtils.java:132)
at org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:95)
at org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:82)
at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:211)
at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:184)
at org.springframework.data.redis.core.AbstractOperations.execute(AbstractOperations.java:95)
at org.springframework.data.redis.core.DefaultValueOperations.set(DefaultValueOperations.java:236)
at com.test.infrastructure.InfrastructureApplicationTests.test(InfrastructureApplicationTests.java:40)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
推荐答案
NullPointerException 正在发生，因为 LettuceConnectionFactory 尚未初始化.它应该由 Spring Framework 调用 afterPropertiesSet() 初始化，这是标准 bean 生命周期方法之一.由于 RedisConfig.lettuceConnectionFactoryTest() 上缺少 @Bean 注释，因此不会调用该方法，因为您的 LettuceConnectionFactory 不是 bean.
The NullPointerException is occurring because LettuceConnectionFactory has not been initialised. It should be initialised by Spring Framework calling afterPropertiesSet() which is one of the standard bean lifecycle methods. That method isn't being called as your LettuceConnectionFactory isn't a bean due to a missing @Bean annotation on RedisConfig.lettuceConnectionFactoryTest().
在 RedisConfig.lettuceConnectionFactoryTest() 上添加 @Bean 应该可以解决您的问题.它还允许您直接注入 LettuceConnectionFactory(到测试中的 @Autowired 字段)，而不是注入 RedisConfig 然后调用 lettuceConnectionFactoryTest() 就可以了.
Adding @Bean on RedisConfig.lettuceConnectionFactoryTest() should solve your problem. It will also allow you to inject LettuceConnectionFactory directly (into an @Autowired field in your test) rather than injecting RedisConfig and then calling lettuceConnectionFactoryTest() on it.
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