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POSpring AOP and Interfaces with Generics (Inheritance)
 

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  1. POSpring AOP and Interfaces with Generics (Inheritance)
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    <p>I have looked at a few other postings to try and solve this issue.</p> <p><a href="https://stackoverflow.com/questions/7727454/clarification-around-spring-aop-pointcuts-and-inheritance">Clarification around Spring-AOP pointcuts and inheritance</a></p> <p><a href="https://stackoverflow.com/questions/2847640/spring-aop-pointcut-that-matches-annotation-on-interface">Spring AOP pointcut that matches annotation on interface</a></p> <p>I have a scenario where we have some base interfaces that define some high level methods for data access (strongly typed via generics). I then have an interface that implements essentially overrides/reimplements the same methods in order to strongly type them and to provide JAX-WS annotations. The interesting point is that even though I redefine the methods within this interface, the Spring AOP pointcuts will not accept the pointcut and start a Transaction...so I get an error via Spring/JPA/Hibernate "Caused by: javax.persistence.TransactionRequiredException: no transaction is in progress".</p> <p>We have other "services" that utilize Spring AOP successfully, but they don't inherit Generic methods from a super interface.</p> <p>This is the top level class:</p> <pre><code>public interface BaseCoreDataService&lt;O extends Comparable&lt;O&gt;, T extends DomainModel&lt;O&gt;&gt; extends BaseService { @WebMethod(exclude = true) BaseDao&lt;O, T&gt; getBaseDao(); O save(T model); } </code></pre> <p>Which is inherited/extended by this interface (adding another method):</p> <pre><code>public interface BaseSimpleDataService&lt;O extends Comparable&lt;O&gt;, T extends DomainModel&lt;O&gt;&gt; extends BaseCoreDataService&lt;O, T&gt; { T get(O id); } </code></pre> <p>Which is finally inherited/extended with this interface that strongly types the Generic and provide the JAX-WS annotations:</p> <pre><code>public interface UserDataService extends BaseSimpleDataService&lt;Long, User&gt; { @RequestWrapper(localName = "GetUserById", className = "com.foo.UserDataService.GetUserById", targetNamespace = "http://foo.com") @ResponseWrapper(localName = "GetUserByIdResponse", className = "com.foo.UserDataService.GetUserByIdResponse", targetNamespace = "http://foo.com") @WebResult(targetNamespace = "http://foo.com", name = "User") @WebMethod(operationName = "getUserById") User get(@WebParam(targetNamespace = "http://foo.com", name = "Id") Long id) throws ValidationException; @RequestWrapper(localName = "SaveUser", className = "com.foo.UserDataService.SaveUser", targetNamespace = "http://foo.com") @ResponseWrapper(localName = "SaveUserResponse", className = "com.foo.UserDataService.SaveUserResponse", targetNamespace = "http://foo.com") @WebResult(targetNamespace = "http://foo.com", name = "Id") @WebMethod(operationName = "saveUser") Long save( @WebParam(targetNamespace = "http://foo.com", name = "User") User model) throws ValidationException; } </code></pre> <p>So if I include the following pointcut, the invocation blows an exception that a transaction does not exist:</p> <pre><code>&lt;bean id="GlobalDataTransactionManager" class="org.springframework.transaction.jta.WebLogicJtaTransactionManager" p:transactionManagerName="javax.transaction.TransactionManager"/&gt; &lt;tx:advice id="GlobalDataTxAdvice" transaction-manager="GlobalDataTransactionManager"&gt; &lt;tx:attributes&gt; &lt;tx:method name="get*" timeout="60" no-rollback-for="javax.persistence.NoResultException,javax.persistence.NonUniqueResultException,org.springframework.dao.EmptyResultDataAccessException"/&gt; &lt;tx:method name="find*" timeout="60" no-rollback-for="javax.persistence.NoResultException,javax.persistence.NonUniqueResultException,org.springframework.dao.EmptyResultDataAccessException"/&gt; &lt;tx:method name="search*" timeout="60" no-rollback-for="javax.persistence.NoResultException,javax.persistence.NonUniqueResultException,org.springframework.dao.EmptyResultDataAccessException"/&gt; &lt;tx:method name="*" timeout="60"/&gt; &lt;/tx:attributes&gt; &lt;/tx:advice&gt; &lt;aop:config&gt; &lt;aop:advisor advice-ref="GlobalDataTxAdvice" pointcut="execution(* com.foo..UserDataService.*(..))"/&gt; &lt;/aop:config&gt; </code></pre> <p>But if I add in an additional advisor/pointcut for the parent classes, the transaction works and saves/gets essentially succeed:</p> <pre><code>&lt;aop:config&gt; &lt;aop:advisor advice-ref="GlobalDataTxAdvice" pointcut="execution(* com.foo..UserDataService.*(..))"/&gt; &lt;aop:advisor advice-ref="GlobalDataTxAdvice" pointcut="execution(* com.foo.core.*DataService.*(..))"/&gt; &lt;/aop:config&gt; </code></pre> <p>I am not sure if the issue revolves around inheritance of interfaces? The odd thing is that in this final interface UserDataService, I have all the methods redefined...but this still fails when invoking save/get with a "no transaction in progress", even though the stacktrace includes Spring AOP classes.</p> <p>So adding the additional advisor/pointcut fixes it, I just want to understand why?</p>
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    1. USJay Blanton
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    1. COWhat is the kind of "TxAdvice"? And could you please provide its code?
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      1. USAlexey Berezkin
 

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