inbound gateway -> outbound gateway

[gasslingen]

I'm trying to get my first spring integration sample to work.
This is what I like to do:
browser(http request) -> inbound gateway -> outbound gateway -> read index.html and return the response to the browser.

Please can someone help me out to get this working. I get an exception when starting my server:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.integration.config.ConsumerEndpointFactoryBean#0': Cannot resolve reference to bean 'org.springframework.integration.config.ServiceActivatorFactoryBean#0' while setting bean property 'handler'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.integration.config.ServiceActivatorFactoryBean#0': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalArgumentException: Found ambiguous parameter type [interface java.util.List] for method match: [public void org.springframework.integration.handler.AbstractReplyProducingMessageHandler.setSendTimeout(long), public void org.springframework.integration.handler.AbstractMessageHandler.setOrder(int), public void org.springframework.integration.handler.AbstractReplyProducingMessageHandler.setChannelResolver(org.springframework.integration.support.channel.ChannelResolver), public void org.springframework.integration.http.outbound.HttpRequestExecutingMessageHandler.setHeaderMapper(org.springframework.integration.mapping.HeaderMapper), public void org.springframework.integration.http.outbound.HttpRequestExecutingMessageHandler.setExpectedResponseType(java.lang.Class), public void org.springframework.integration.http.outbound.HttpRequestExecutingMessageHandler.setUriVariableExpressions(java.util.Map), public void org.springframework.integration.handler.AbstractMessageHandler.setShouldTrack(boolean), public void org.springframework.integration.context.IntegrationObjectSupport.setComponentName(java.lang.String), public final java.lang.String org.springframework.integration.context.IntegrationObjectSupport.getComponentName(), public void org.springframework.integration.handler.AbstractReplyProducingMessageHandler.setOutputChannel(org.springframework.integration.MessageChannel), public final void org.springframework.integration.context.IntegrationObjectSupport.setBeanFactory(org.springframework.beans.factory.BeanFactory), public void org.springframework.integration.http.outbound.HttpRequestExecutingMessageHandler.setRequestFactory(org.springframework.http.client.ClientHttpRequestFactory), public final void org.springframework.integration.handler.AbstractMessageHandler.handleMessage(org.springframework.integration.Message), public void org.springframework.integration.http.outbound.HttpRequestExecutingMessageHandler.setErrorHandler(org.springframework.web.client.ResponseErrorHandler), public void org.springframework.integration.http.outbound.HttpRequestExecutingMessageHandler.setHttpMethod(org.springframework.http.HttpMethod)]
	at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:328)
	at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:106)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1325)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1086)

config:

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xmlns:int="http://www.springframework.org/schema/integration" xmlns:int-http="http://www.springframework.org/schema/integration/http"
        xmlns:util="http://www.springframework.org/schema/util"
        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
                http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration-2.0.xsd
                http://www.springframework.org/schema/integration/http http://www.springframework.org/schema/integration/http/spring-integration-http-2.0.xsd
                http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd">


    <int-http:inbound-gateway id="gateway-in"
                              request-channel="requestChannel"
                              reply-channel="replyChannel"/>

    <bean id="gateway-out" class="org.springframework.integration.http.outbound.HttpRequestExecutingMessageHandler">
        <constructor-arg value="http://localhost:8080/index.html"/>
        <property name="outputChannel" ref="replyChannel"/>
    </bean>

    <int:service-activator input-channel="requestChannel"
                           output-channel="replyChannel"
                           ref="gateway-out"/>

    <int:channel id="requestChannel"/>
    <int:channel id="replyChannel"/>

</beans>

[oleg.zhurakousky]

There are couple of issues.
First if you really want your configuration to work you need to add 'method="handleMessage"' attribute to your service-activator configuration since HttpRequestExecutingMessageHandler has several methods thus creating an ambiguity.
Having said that your configuration could be much simpler for the use case you are describing. You don't need a service-activator at all. All you need is connect inbound with outbound via channel

<int-http:inbound-gateway id="gateway-in"
                              request-channel="requestChannel"/>

<int-http:outbound-gateway request-channel="requestChannel" 
	url="http://localhost:8080/. . ."
	http-method="GET"/>" 


<int:channel id="requestChannel"/>

Note, how there is no need to define an explicit reply-channel as one will be auto-created