<p:panelGrid columns="2" styleClass="ui-panelgrid-blank">
    <p:outputLabel value="#{msg.image}: " for="image" />
    <p:graphicImage id="image" value="#{mbImageStreamer.initialInspectionImage}"
        width="200">
        <f:param name="id" value="#{initialInspectionController.initialInspectionCurrent.initialInspectionImage.id}" />
    </p:graphicImage>
</p:panelGrid>

@ManagedBean(name = "mbImageStreamer")
@ApplicationScoped
public class ImageStreamer {

    @EJB
    private ImageService service;

    public StreamedContent getInitialInspectionImage() throws IOException {
        FacesContext context = FacesContext.getCurrentInstance();

        if (context.getCurrentPhaseId() == PhaseId.RENDER_RESPONSE) {
            return new DefaultStreamedContent();
        } else {
            String imageId = context.getExternalContext().getRequestParameterMap().get("id");
            InitialInspectionImage image = service.findInitialInspectionImage(Integer.valueOf(imageId));
            return new DefaultStreamedContent(new ByteArrayInputStream(image.getImage()));
        }
    }
}