Spring: Configuring Bean with a two argument setter

Question

I would like to configure a HttpParams using spring setter injection but HttpParams has a two argument setter ( setParameter(String name, Object object) ). Is anyone aware of a way to configure this in spring?

The closest I can think of is like you would do a List, Set, or Property configuration:

http://www.mkyong.com/spring/spring-collections-list-set-map-and-properties-example/

Thanks!

Sean Patrick Floyd · Answer 1 · 2011-03-15T13:52:25.440

Strictly speaking: A setter with two parameters is not a setter. It violates the JavaBeans convention, on which Spring builds. There is no simple way to solve that.

As an alternative, here's a Helper class you can use to configure your HttpParams object with Spring:

public class HttpParamSetter{

    private HttpParams httpParams;

    public void setHttpParams(HttpParams httpParams){
        this.httpParams = httpParams;
    }

    private Map<String, Object> parameters;

    public void setParameters(Map<String, Object> parameters){
        this.parameters = parameters;
    }

    @PostConstruct
    public void applyParameters(){
        for(Entry<String, Object> entry:parameters.entrySet()){
            httpParams.setParameter(entry.getKey(), entry.getValue());
        }

    }

}

Wire it like this:

<bean class="com.yourcompany.HttpParamSetter">
    <property name="httpParams" ref="httpParams" />
    <property name="parameters">
        <map>
            <entry key="foo" value="bar" />
            <entry key="baz" value="phleem" />
        </map>
    </property>
</bean>

Thanks I thought there wasn't a way to do it purely using spring what we ended up doing is implementing a Spring FactoryBean that can supply the necessary connection factory then the config looks like: with httpParamFactory being an instance of our FactoryBean. — craftsmanadam, Mar 15 '11 at 15:17
@craftsmanadam I was initially going to suggest that, but I didn't know if you created the Params object yourself, so I went for a solution that should always work (but yours is probably more spring-like) — Sean Patrick Floyd, Mar 15 '11 at 17:04

score 3 · Answer 2 · answered Sep 05 '12 at 23:58

3

I believe HttpConnectionParamBean and HttpProtocolParamBean were created for precisely this purpose. Documentation Example

answered Sep 05 '12 at 23:58

tgoodhart

3,111
26
37

score 1 · Answer 3 · answered Mar 15 '11 at 13:57

Are you using Apache HttpClient? If so, the HttpClientParams implementation of HttpParams has real getters and setters that you can use.

Otherwise, I'd suggest writing a simple HttpParamsFactory that you could pass a map that contains the parameters you need and construct an appropriate instance of HttpParams.

Spring: Configuring Bean with a two argument setter

3 Answers3

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