Question

I am trying to create simple blog with jsf 2.0. It contains 2 classes:

BlogManager (in session scope)
Blog(in request scope)

@Named("blogManager")
@SessionScoped
public class BlogManager {
    private List<Blog> blogs;

    @ManagedProperty(value = "#{blog}")
    Blog blog;

    public BlogManager() {
        blogs = new ArrayList<Blog>();
    }

    public List<Blog> getBlogs() {
        return blogs;
    }

    public void setBlogs(List<Blog> blogs) {
        this.blogs = blogs;
    }

    public Blog getBlog() {
        return blog;
    }

    public void setBlog(Blog blog) {
        this.blog = blog;
    }

    public void addBlog() {
        blogs.add(blog);
    }

    public void removeBlog(Blog blog) {
        blogs.add(blog);
    }
}

the blog class:

@Named("blog")
@RequestScoped
public class Blog {

    private Integer id;

    private String title;
    private String text;
    private Date date;

    public Blog() {
        id = (int) System.currentTimeMillis();
    }

    private Integer readed;

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }

    public Date getDate() {
        return date;
    }

    public void setDate(Date date) {
        this.date = date;
    }

    public Integer getReaded() {
        return readed;
    }

    public void setReaded(Integer readed) {
        this.readed = readed;
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

}

then inside my xhtml form i am writing this thing:

<h:form>
            <fieldset>
                <legend>Blog</legend>
                <p>
                    Title:
                    <h:inputText value="#{blog.title}" />
                </p>
                <p>
                    Text:
                    <h:inputTextarea value="#{blog.text}" />
                </p>
                <p>
                    <h:commandButton action="#{blogManager.addBlog}" />
                </p>
            </fieldset>
        </h:form>

when i click submit it says blog target unreachable. It is request scope. I was thinking once jsf could not find the blog object then it creates and assigns user input to blog object. then i can see it in blogManager. But it does not work. what scope should i use for Blog class? And can i inject request scope in blogManager?

thanks

Answer 1

Ideally, your Blog class should only be a POJO. And it should be a member of BlogManager. So the only bean you need will be
BlogManager :

@Named("blogManager")
@SessionScoped
public class BlogManager {
    private List<Blog> blogs;

    private Blog blog;

    public BlogManager() {
        blogs = new ArrayList<Blog>();
            blog = new Blog();
    }

    // getter setters for blog and blogs

    public void addBlog() {
        blogs.add(blog);
    }

    public void removeBlog(Blog blog) {
        blogs.add(blog);
    }
}

the blog class:

public class Blog {

    private Integer id;

    private String title;
    private String text;
    private Date date;
    private Integer readed;

    public Blog() {
        id = (int) System.currentTimeMillis();
    }

    // getters-setters

}

And your xhtml :

<h:form>
            <fieldset>
                <legend>Blog</legend>
                <p>
                    Title:
                    <h:inputText value="#{blogManager.blog.title}" />
                </p>
                <p>
                    Text:
                    <h:inputTextarea value="#{blogManager.blog.text}" />
                </p>
                <p>
                    <h:commandButton action="#{blogManager.addBlog}" />
                </p>
            </fieldset>
        </h:form>