On my project, I currently use AspectJ (not just Spring AOP due to some limitation) with the weaving at the Compile Time. In order to speed up the development on Eclipse, I want to do the weaving at the Load Time. I succeed to do that but with one major constraint: using an interface for my service that contained some transactional methods. If I declare the service with its implementation instead of its interface, in the caller class, there is no weaving and so no transaction supported.
So if it is supported by AspectJ, how to configure AspectJ with Load Time Weaving without Interface ?
I created a little project that reproduce the issue:
The following test fail.
The following test succeed if :
the injected service is declared with its interface instead of its implementation (i.e. replace "@Inject MyServiceImpl service" by "@Inject MyService service"), the test succeed.
the weaving is executed during the compilation (the configuration, POM & Spring application context, is obviously different in this case). But my goal is to do the weaving at the Load-Time to avoid a weaving phase every time I save a Java file.
Spring AOP (tx:annotation-driven mode="proxy"), that is a proxy-based solution, is used instead of AspectJ. But in this case, we encountered the self-invocation issue, i.e. a method within the target object calling some other method of the target object, won’t lead to an actual transaction at runtime even if the invoked method is marked with @Transactional.
aspectj-ltw/src/test/java/mycompany/aspectj_ltw/MyServiceImplTest.java
package mycompany.aspectj_ltw;
import static junit.framework.Assert.assertTrue;
import javax.inject.Inject;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:/META-INF/spring/applicationContext.xml" })
public class MyServiceImplTest {
@Inject
MyServiceImpl service;
@Test
public void shouldBeExecutedInTransaction() {
assertTrue(this.service.isExecutedInTransaction());
}
}
aspectj-ltw/src/main/java/mycompany/aspectj_ltw/MyService.java
package mycompany.aspectj_ltw;
public interface MyService {
boolean isExecutedInTransaction();
}
aspectj-ltw/src/main/java/mycompany/aspectj_ltw/MyServiceImpl.java
package mycompany.aspectj_ltw;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.transaction.support.TransactionSynchronizationManager;
@Service
public class MyServiceImpl implements MyService {
@Transactional
public boolean isExecutedInTransaction() {
return TransactionSynchronizationManager.isActualTransactionActive();
}
}
aspectj-ltw/src/test/resources/META-INF/applicationContext.xml
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context"
xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd">
<context:component-scan base-package="mycompany.aspectj_ltw" />
<context:load-time-weaver aspectj-weaving="on" />
<aop:config proxy-target-class="true"/>
<aop:aspectj-autoproxy proxy-target-class="true"/>
<tx:annotation-driven mode="aspectj"
transaction-manager="transactionManager" proxy-target-class="true" />
<bean class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close" id="dataSource">
<property name="driverClassName" value="org.h2.Driver" />
<property name="url" value="jdbc:h2:mem:mydb" />
<property name="username" value="sa" />
<property name="password" value="" />
</bean>
<bean class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
id="transactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
</beans>
aspectj-ltw/src/test/resources/META-INF/aop.xml
<!DOCTYPE aspectj PUBLIC
"-//AspectJ//DTD//EN" "http://www.eclipse.org/aspectj/dtd/aspectj.dtd">
<aspectj>
<weaver options="-showWeaveInfo -debug -verbose -XmessageHandlerClass:org.springframework.aop.aspectj.AspectJWeaverMessageHandler">
<include within="mycompany.aspectj_ltw..*"/>
</weaver>
</aspectj>
aspectj-ltw\pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>mycompany</groupId>
<artifactId>aspectj-ltw</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>aspectj-ltw</name>
<properties>
<spring.version>3.0.5.RELEASE</spring.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjrt</artifactId>
<version>1.7.0</version>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.7.0</version>
</dependency>
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib-nodep</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.2.143</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-core</artifactId>
<version>0.9.24</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>0.9.24</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>log4j-over-slf4j</artifactId>
<version>1.6.1</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<configuration>
<forkMode>always</forkMode>
<argLine>
-javaagent:C:/maven-2_local_repo/org/springframework/spring-instrument/3.0.5.RELEASE/spring-instrument-3.0.5.RELEASE.jar
</argLine>
</configuration>
</plugin>
</plugins>
</build>
</project>
VM arguments to run the test:
-javaagent:C:/maven-2_local_repo/org/springframework/spring-instrument/3.0.5.RELEASE/spring-instrument-3.0.5.RELEASE.jar
