spring redis running script : how to pass expiry time value - spring-boot

Question

I use the lua script:
local lock = redis.call('get', KEYS[1])
if not lock then
return redis.call('SETEX', KEYS[1], ARGV[1] ,ARGV[2] );
end
return false
From spring boot application I use to call redis with the script
DefaultRedisScript<Boolean> redisScript = new
DefaultRedisScript<Boolean>();
redisScript.setScriptSource(new ResourceScriptSource(new ClassPathResource("checkandset2.lua")));
redisScript.setResultType(Boolean.class);
System.out.println(redisTemplate.execute(redisScript , Collections.singletonList("value123"),"10" ,"key123"));
I always get exception :
java.lang.ClassCastException: java.lang.Long cannot be cast to java.lang.String
at org.springframework.data.redis.serializer.StringRedisSerializer.serialize(StringRedisSerializer.java:32)
at org.springframework.data.redis.core.script.DefaultScriptExecutor.keysAndArgs(DefaultScriptExecutor.java:116)
at org.springframework.data.redis.core.script.DefaultScriptExecutor$1.doInRedis(DefaultScriptExecutor.java:63)
at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:202)
at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:164)
at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:152)
at org.springframework.data.redis.core.script.DefaultScriptExecutor.execute(DefaultScriptExecutor.java:60)
at org.springframework.data.redis.core.script.DefaultScriptExecutor.execute(DefaultScriptExecutor.java:54)
at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:298)
at com.masary.ledger.ResisScriptTestClass.msisdnJustRechargedException(ResisScriptTestClass.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
When I use
System.out.println(redisTemplate.execute(redisScript ,
Collections.singletonList("value123"),new Long(10) ,"key123"));
I get exception
org.springframework.data.redis.RedisSystemException: Unknown redis exception; nested exception is java.lang.ClassCastException: [B cannot be cast to java.lang.Long
at org.springframework.data.redis.FallbackExceptionTranslationStrategy.getFallback(FallbackExceptionTranslationStrategy.java:48)
at org.springframework.data.redis.FallbackExceptionTranslationStrategy.translate(FallbackExceptionTranslationStrategy.java:38)
at org.springframework.data.redis.connection.jedis.JedisConnection.convertJedisAccessException(JedisConnection.java:212)
at org.springframework.data.redis.connection.jedis.JedisConnection.evalSha(JedisConnection.java:3173)
at org.springframework.data.redis.connection.jedis.JedisConnection.evalSha(JedisConnection.java:3158)
at org.springframework.data.redis.connection.DefaultStringRedisConnection.evalSha(DefaultStringRedisConnection.java:1374)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.data.redis.core.CloseSuppressingInvocationHandler.invoke(CloseSuppressingInvocationHandler.java:57)
at com.sun.proxy.$Proxy182.evalSha(Unknown Source)
at org.springframework.data.redis.core.script.DefaultScriptExecutor.eval(DefaultScriptExecutor.java:81)
at org.springframework.data.redis.core.script.DefaultScriptExecutor$1.doInRedis(DefaultScriptExecutor.java:71)
at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:202)
at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:164)
at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:152)
at org.springframework.data.redis.core.script.DefaultScriptExecutor.execute(DefaultScriptExecutor.java:60)
at org.springframework.data.redis.core.script.DefaultScriptExecutor.execute(DefaultScriptExecutor.java:54)
at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:298)
at com.masary.ledger.ResisScriptTestClass.msisdnJustRechargedException(ResisScriptTestClass.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
.
.
Caused by: java.lang.ClassCastException: [B cannot be cast to java.lang.Long
at org.springframework.data.redis.connection.jedis.JedisScriptReturnConverter.convert(JedisScriptReturnConverter.java:53)
at org.springframework.data.redis.connection.jedis.JedisConnection.evalSha(JedisConnection.java:3171)
... 46 more
any advice how can I pass expiry time value to the lua script?

Answer 1

I'm a newbie myself, and was having a similar problem. Try sending the string "10", instead of the Long. Worked for me.

Answer 2

The thread might be old, but might be helpful for others who might stumble upon this.
For me, the reason was using JdkSerializationRedisSerializer as value serializer, like: redisTemplate.setValueSerializer(new JdkSerializationRedisSerializer()), this is also the default.
To fix this, see below the fix:
private static void redisEvalForExpire(String scriptText, List<String> keys, Object[] argv) {
// since spring boot serializes data to - "\xac\xed\x00\x05t\x00\x0" it was not being recognized by redis as integer
redisTemplate.execute(new DefaultRedisScript<>(scriptText), new StringRedisSerializer(), new StringRedisSerializer(), keys, argv);
}
This says use StringRedisSerializer for any value, so when we do - set a 2, using JdkSerializationRedisSerializer, 2 serialized to something like:
"\xac\xed\x00\x05sr\x00\x11java.lang.Integer\x12\xe2\xa0\xa4\xf7\x81\x878\x02\x00\x01I\x00\x05valuexr\x00\x10java.lang.Number\x86\xac\x95\x1d\x0b\x94\xe0\x8b\x02\x00\x00xp\x00\x00\x00\x02"
but when we say use StringRedisSerializer, 2 is sent as "2", which Redis can easily recognize.
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