Can't evict from Spring Cache in Guice DI app - spring

Question

I'm trying to use String Cache abstraction mechanism with guice modules.
I've created interceptors:
CacheManager cacheManager = createCacheManager();
bind(CacheManager.class).toInstance(cacheManager);
AppCacheInterceptor interceptor = new AppCacheInterceptor(
cacheManager,
createCacheOperationSource()
);
bindInterceptor(
Matchers.any(),
Matchers.annotatedWith(Cacheable.class),
interceptor
);
bindInterceptor(
Matchers.any(),
Matchers.annotatedWith(CacheEvict.class),
interceptor
);
Then, implemented Strings Cache interface and CacheManager, and finally annotated my DAO classes with #Cachable and #CacheEvict:
public class DaoTester {
QssandraConsumer qs;
#CachePut(value = "cached_consumers", key = "#consumer.id")
public void save(QssandraConsumer consumer) {
qs = consumer;
}
#Cacheable(value = "cached_consumers")
public QssandraConsumer get(String id) {
if (id != null) {
qs.getId();
}
return qs;
}
#CacheEvict(value = "cached_consumers", key = "#consumer.id")
public void remove(QssandraConsumer consumer) {
qs = consumer;
}}
Caching is simply fine - no problems here, but when i try to evict(calling remove method in this example), evrything crashes and I see:
Exception in thread "main" org.springframework.expression.spel.SpelEvaluationException: EL1007E:(pos 10): Field or property 'id' cannot be found on null
at org.springframework.expression.spel.ast.PropertyOrFieldReference.readProperty(PropertyOrFieldReference.java:205)
at org.springframework.expression.spel.ast.PropertyOrFieldReference.getValueInternal(PropertyOrFieldReference.java:72)
at org.springframework.expression.spel.ast.CompoundExpression.getValueInternal(CompoundExpression.java:57)
at org.springframework.expression.spel.ast.SpelNodeImpl.getValue(SpelNodeImpl.java:93)
at org.springframework.expression.spel.standard.SpelExpression.getValue(SpelExpression.java:88)
at org.springframework.cache.interceptor.ExpressionEvaluator.key(ExpressionEvaluator.java:80)
at org.springframework.cache.interceptor.CacheAspectSupport$CacheOperationContext.generateKey(CacheAspectSupport.java:464)
at org.springframework.cache.interceptor.CacheAspectSupport.inspectCacheEvicts(CacheAspectSupport.java:260)
at org.springframework.cache.interceptor.CacheAspectSupport.inspectAfterCacheEvicts(CacheAspectSupport.java:232)
at org.springframework.cache.interceptor.CacheAspectSupport.execute(CacheAspectSupport.java:215)
at org.springframework.cache.interceptor.CacheInterceptor.invoke(CacheInterceptor.java:66)
at qiwi.qommon.deployment.dao.DaoTester.main(DaoTester.java:44)
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 com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
What's wrong here?!
BTW, cached object is:
public class QssandraConsumer implements Identifiable<String> {
private String id;
private String host;
#Override
public String getId() {
return id;
}
#Override
public void setId(String id) {
this.id = id;
}
public String getHost() {
return host;
}
public void setHost(String host) {
this.host = host;
}
#Override
public boolean equals(Object object) {
if (this == object) {
return true;
}
if (null == object) {
return false;
}
if (!(object instanceof QssandraConsumer)) {
return false;
}
QssandraConsumer o = (QssandraConsumer) object;
return
Objects.equal(id, o.id)
&& Objects.equal(host, o.host);
}
#Override
public int hashCode() {
return Objects.hashCode(
id, host
);
}
#Override
public String toString() {
return Objects.toStringHelper(this)
.addValue(id)
.addValue(host)
.toString();
}
}

Answer 1

Finally I figured out what was the reason of the problem:
when injecting a class that uses annotation(which are intercepted, like #Cachable or #CacheEvict) Guice enhances class (AOP make bytecode modification in runtime). So when CacheInterceptor tryed to evaluate key = "#consumer.id" it failed because couldn't find argument name in enhanced class (see: LocalVariableTableParameterNameDiscoverer#inspectClass).
So it will not work in Guice out of the box.
In spring the proxy class is created - so no problems here.