Spring Remoting (HttpInvoker) and problem with bean creation (scope)

[Luciano Molinari]

Hello,

I have a service that's exposed by HttpInvoker (org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter) and a test class with some tests.
applicationContext.xml

...
	<bean id="logRequisicaoService" 
		class="log.LoggerRequisicaoImpl"/>
..

logRequisicao-servlet.xml

...
	<bean id="httpLogRequisicaoService"
		class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter"
		p:service-ref="logRequisicaoService">
		<property name="serviceInterface">
			<value>log.LoggerRequisicao</value>
		</property>
	</bean>

	<bean id="urlMapping"
		class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
		<property name="mappings">
			<props>
				<prop key="/logRequisicao">httpLogRequisicaoService</prop>
			</props>
		</property>
	</bean>
..

applicationContext-client.xml

...
   <bean id="logRequisicaoService"
         class="org.springframework.remoting.httpinvoker.HttpInvokerProxyFactoryBean">
      <property name="serviceUrl">
         <value>http://localhost:8080/logremoto/logRequisicao</value>
      </property>
      <property name="serviceInterface">
         <value>log.LoggerRequisicao</value>
      </property>
   </bean>
...

TestClass

...
	@Test
	public void test1() {
		LoggerRequisicao logger = Utils.getBean("logRequisicaoService");
		logger.info(1, "Loading XML Data");
		logger.warn(1, "Another message");
		logger.closeFile(1);
		
		//assertions
		
		logger.deleteLog(1);
	}

	@Test
	public void test2() {
		LoggerRequisicao logger = Utils.getBean("logRequisicaoService");
		...
	}

The problem is that my class (LoggerRequisicao) isn't thread-safe, so i can't have only one instance shared for all remote invocations. That's where my problems have started. I spent a good time looking for something about and i know i can define another scope for the bean different than singleton, which is the default. I tried different ways:

1)
applicationContext.xml

...
	<bean id="logRequisicaoService" 
		class="log.LoggerRequisicaoImpl" scope="prototype"/>
..

logRequisicao-servlet.xml

...
	<bean id="httpLogRequisicaoService"
		class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter"
		p:service-ref="logRequisicaoService">
		<property name="serviceInterface">
			<value>log.LoggerRequisicao</value>
		</property>
	</bean>
..

Result: Just one instance is created. It's the same behavior when i hadn't defined the bean logRequisicaoService scope as prototype.

2)
applicationContext.xml

...
	<bean id="logRequisicaoService" 
		class="log.LoggerRequisicaoImpl" scope="prototype"/>
..

logRequisicao-servlet.xml

...
	<bean id="httpLogRequisicaoService"
		class="org.springframework.remoting.httpinvoker.HttpInvokerServiceExporter"
		p:service-ref="logRequisicaoService" scope="prototype">
		<property name="serviceInterface">
			<value>log.LoggerRequisicao</value>
		</property>
	</bean>
..

Result: One instance is created for each method call. For example:

		LoggerRequisicao logger = Utils.getBean("logRequisicaoService");
		logger.info(1, "Loading XML Data");
		logger.warn(1, "Another message");
		logger.closeFile(1);

3 or 4 instances would be created.

What i really need is that 1 instance was created by each getBean called. In the Test Class, 1 instance per test. I really researched about it and tested different ways, but i couldn't be able to make it works.

Does somebody have any idea of how to solve that problem?


Thank you veru much.
Luciano

Ps.: Sorry for the english