如何使用Spring-data-Redis实现Redis Multi-Exec
所有Spring配置都已正确编写。 非Multi-Exec Redis操作非常有效。
@Autowired @Qualifier("stringRedisTemplate") StringRedisTemplate template; void test(){ template.multi(); template.boundValueOps("somevkey").increment(1); template.boundZSetOps("somezkey").add("zvalue", timestamp); template.exec(); } 通过Junit Test运行上面的代码后，抛出了exception。
org.springframework.data.redis.RedisSystemException: Unknown exception; nested exception is org.springframework.data.redis.RedisSystemException: Unknown jedis exception; nested exception is java.lang.NullPointerException at org.springframework.data.redis.connection.jedis.JedisUtils.convertJedisAccessException(JedisUtils.java:93) at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.translateExceptionIfPossible(JedisConnectionFactory.java:155) at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:58) at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:213) at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:163) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) at $Proxy66.appendUserStream(Unknown Source) at com.uniu.test.repository.StreamCacheRepositoryTest.testAppendUserStream(StreamCacheRepositoryTest.java:23) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28) at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74) at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83) at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184) at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71) at org.junit.runners.ParentRunner.run(ParentRunner.java:236) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) Caused by: org.springframework.data.redis.RedisSystemException: Unknown jedis exception; nested exception is java.lang.NullPointerException at org.springframework.data.redis.connection.jedis.JedisConnection.convertJedisAccessException(JedisConnection.java:119) at org.springframework.data.redis.connection.jedis.JedisConnection.exec(JedisConnection.java:523) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework.data.redis.core.CloseSuppressingInvocationHandler.invoke(CloseSuppressingInvocationHandler.java:58) at $Proxy70.exec(Unknown Source) at org.springframework.data.redis.core.RedisTemplate$1.doInRedis(RedisTemplate.java:416) at org.springframework.data.redis.core.RedisTemplate$1.doInRedis(RedisTemplate.java:412) at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:162) at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:133) at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:121) at org.springframework.data.redis.core.RedisTemplate.exec(RedisTemplate.java:412) at com.uniu.repository.impl.StreamCacheRepositoryRedisImpl.appendUserStream(StreamCacheRepositoryRedisImpl.java:37) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:318) at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:155) ... 33 more Caused by: java.lang.NullPointerException at redis.clients.jedis.BinaryTransaction.exec(BinaryTransaction.java:31) at org.springframework.data.redis.connection.jedis.JedisConnection.exec(JedisConnection.java:521) ... 54 more
我检查redis服务器，上面两个命令已经执行，结果是正确的。 所以问题出现在代码的最后一行（template.exec（））。 当底层的JedisClient尝试从EXEC获得multibulk响应时，它似乎抛出NullPointerException
我使用spring-data-redis 1.0.0.RELEASE感谢您的帮助。
exception的原因可能是Spring模板实现没有为.exec()和.exec()重用相同的连接。 您可以尝试通过回调使用execute() ：
private RedisTemplate template = ...; template.execute( new RedisCallback() { @Override public Object doInRedis(RedisConnection connection) throws DataAccessException { connection.multi(); //do whatever you need, like deleting and repopulating some keys connection.expire(CHANNEL_KEY.getBytes(), EXPIRE_SECS); connection.exec(); return null; } } );
template.setEnableTransactionSupport(true);
也许你可以使用它来启用交易
彼得是对的。 你需要将它放入SessionCallback。
以下是使用Spring Data Redis进行事务的快速摘要：
https://github.com/eric-wu/dashboard/wiki/3.-Redis-Transactions-via-Spring-Data-Redis
对于您的情况，向下滚动并查看“使用WATCH，MULTI和EXEC进行乐观锁定”。