EhCache No serializer found

问题

I am initializing my cache in the following way:

CacheManager cacheManager;

cacheManager = CacheManagerBuilder.newCacheManagerBuilder().build();
cacheManager.init();

Cache<String, SmsMessageDto> myCache = cacheManager.createCache("myCache", CacheConfigurationBuilder.newCacheConfigurationBuilder(String.class, SmsMessageDto.class)
    .withExpiry(Expirations.timeToLiveExpiration(new Duration(cacheDuration, TimeUnit.MINUTES)))
    .build());

Which gives me the following warning:

org.ehcache.core.EhcacheManager - Could not create serializers for myCache
org.ehcache.spi.serialization.UnsupportedTypeException: No serializer found for type 'com.example.dto.SmsMessageDto'
    at org.ehcache.impl.internal.spi.serialization.DefaultSerializationProvider$AbstractProvider.getClassFor(DefaultSerializationProvider.java:271) ~[ehcache-3.0.0.rc1.jar:3.0.0.rc1]
    at org.ehcache.impl.internal.spi.serialization.DefaultSerializationProvider$TransientProvider.createSerializer(DefaultSerializationProvider.java:149) ~[ehcache-3.0.0.rc1.jar:3.0.0.rc1]
    at org.ehcache.impl.internal.spi.serialization.DefaultSerializationProvider$AbstractProvider.createValueSerializer(DefaultSerializationProvider.java:239) ~[ehcache-3.0.0.rc1.jar:3.0.0.rc1]
    at org.ehcache.impl.internal.spi.serialization.DefaultSerializationProvider.createValueSerializer(DefaultSerializationProvider.java:96) ~[ehcache-3.0.0.rc1.jar:3.0.0.rc1]
    at org.ehcache.core.EhcacheManager.getStore(EhcacheManager.java:455) [ehcache-3.0.0.rc1.jar:3.0.0.rc1]
    at org.ehcache.core.EhcacheManager.createNewEhcache(EhcacheManager.java:308) [ehcache-3.0.0.rc1.jar:3.0.0.rc1]
    at org.ehcache.core.EhcacheManager.createCache(EhcacheManager.java:261) [ehcache-3.0.0.rc1.jar:3.0.0.rc1]
    at org.ehcache.core.EhcacheManager.createCache(EhcacheManager.java:240) [ehcache-3.0.0.rc1.jar:3.0.0.rc1]
    at at.xcard.helper.SmsFailedCache.init(SmsFailedCache.java:45) [classes/:na]
    at at.xcard.SmsWorker.<init>(SmsWorker.java:49) [classes/:na]
    at at.xcard.Main.main(Main.java:36) [classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_25]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_25]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_25]
    at java.lang.reflect.Method.invoke(Method.java:483) ~[na:1.8.0_25]
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) [idea_rt.jar:na]

QUESTION: how can I convince EhCache to use my toString method of the com.example.dto.SmsMessageDto object?

回答1:

Given that you are not using the offheap or disk tier, there is no requirement for a serializer.

Now I see you are using version 3.0.0.rc1. I would strongly recommend not using an RC at this point and instead use the latest (at this time) 3.1.2.

I believe what you are experiencing is a bug that has most likely been fixed since then.

回答2:

In short it is not possible. You have to implement Serializable interface in your class SmsMessageDto. It will create a serializer for your Serializable class and the Exception will not display again. This answer was based in the following link http://www.ehcache.org/documentation/3.1/serializers-copiers.html section "Bundled implementations"

From the documentation: "By default, cache managers are pre-configured with specially optimized Serializer that can handle the following types, in the following order:

java.io.Serializable

java.lang.Long

java.lang.Integer

java.lang.Float

java.lang.Double

java.lang.Character

java.lang.String

byte[]"

来源：https://stackoverflow.com/questions/39703785/ehcache-no-serializer-found

标签

Ehcache