TreeInvalidatorBean.java

/*
 * (C) Copyright 2010 Nuxeo SA (http://nuxeo.com/) and others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * Contributors:
 *     Thierry Delprat
 */
package org.nuxeo.ecm.webapp.tree;

import java.io.IOException;
import java.io.Serializable;

import javax.faces.context.FacesContext;
import javax.servlet.http.HttpServletResponse;

import org.jboss.seam.annotations.Install;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Scope;

import static org.jboss.seam.ScopeType.SESSION;

@Name("treeInvalidator")
@Scope(SESSION)
@Install(precedence = Install.FRAMEWORK)
public class TreeInvalidatorBean implements Serializable {

    private static final long serialVersionUID = 1L;

    protected boolean needsInvalidation = false;

    public String forceTreeRefresh() throws IOException {

        needsInvalidation = true;

        FacesContext context = FacesContext.getCurrentInstance();
        HttpServletResponse response = (HttpServletResponse) context.getExternalContext().getResponse();
        response.setContentType("application/xml; charset=UTF-8");
        response.getWriter().write("<response>OK</response>");
        context.responseComplete();

        return null;
    }

    public boolean needsInvalidation() {
        return needsInvalidation;
    }

    public void invalidationDone() {
        needsInvalidation = false;
    }

}