How To: Access one managed bean from another (ADF, JSF)

It is a common requirement to access methods between managed beans defined in varied scopes within ADF. In this post, I am invoking backing bean (method to enable/disable a button) from a request bean. The similar approach can be used for other scopes viz. pageFlow, session, application.

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Define your managed beans in your task flow:

    <managed-bean id="__1">
      <managed-bean-name id="__243">RequestBean</managed-bean-name>
      <managed-bean-class id="__244">ui.bean.RequestBean</managed-bean-class>
      <managed-bean-scope id="__245">request</managed-bean-scope>
    </managed-bean>
    <managed-bean id="__2">
      <managed-bean-name id="__248">BackingBean</managed-bean-name>
      <managed-bean-class id="__246">ui.bean.BackingBean</managed-bean-class>
      <managed-bean-scope id="__247">backingBean</managed-bean-scope>
    </managed-bean>

BackingBean Definition:

package ui.bean;

import oracle.adf.view.rich.component.rich.nav.RichCommandToolbarButton;

public class BackingBean {
    private RichButton submitBtn;

    public void setSubmitBtn(RichButton submitBtn) {
        this.submitBtn = submitBtn;
    }

    public RichButton getSubmitBtn() {
        return submitBtn;
    }
}

RequestBean Definition:

package ui.bean;

import javax.el.ELContext;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;

public class RequestBean {

    public BackingBean getBackingBean() {
        FacesContext fctx = FacesContext.getCurrentInstance();
        ELContext context = fctx.getELContext();
        BackingBean backingBean =
            (BackingBean) fctx.getApplication().getExpressionFactory()
                .createValueExpression(context,"#{backingBeanScope.BackingBean}",BackingBean.class)
                .getValue(context);
        return backingBean;
    }

    public void enableSubmit(ActionEvent actionEvent) {
        /* Invoke BackingBean method to enable/disable Submit Button */
        getBackingBean().getSubmitBtn().setDisabled(false);
    }
}

Hope you find this helpful! Please share your feedback below.

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