com.github.javawithmarcus.wicket.cdi.ConversationExpiryChecker.java Source code

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Here is the source code for com.github.javawithmarcus.wicket.cdi.ConversationExpiryChecker.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */
package com.github.javawithmarcus.wicket.cdi;

import java.io.Serializable;

import javax.enterprise.context.ApplicationScoped;
import javax.enterprise.context.Conversation;
import javax.inject.Inject;

import org.apache.wicket.Component;
import org.apache.wicket.Page;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.application.IComponentOnBeforeRenderListener;
import org.apache.wicket.request.cycle.RequestCycle;
import org.apache.wicket.util.lang.Objects;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Checks for conversation expiration during page render and throws a
 * {@link ConversationExpiredException} when an expired conversation is detected.
 * <p/>
 * For example a link that calls {@link Conversation#end()} but does not redirect to a
 * non-conversation-dependent page will be caught by this listener.
 *
 * @author igor
 */
@ApplicationScoped
public class ConversationExpiryChecker implements IComponentOnBeforeRenderListener, Serializable {
    private static final long serialVersionUID = 1L;
    private static final Logger logger = LoggerFactory.getLogger(ConversationExpiryChecker.class);

    @Inject
    AbstractCdiContainer container;

    public ConversationExpiryChecker() {

    }

    @Override
    public void onBeforeRender(Component component) {
        if (component instanceof Page || RequestCycle.get().find(AjaxRequestTarget.class) != null) {
            Page page = component.getPage();
            String cid = container.getConversationMarker(page);
            if (cid != null && !Objects.isEqual(container.getCurrentConversation().getId(), cid)) {
                logger.info("Conversation {} has expired for {}", cid, page);
                throw new ConversationExpiredException(null, cid, page,
                        RequestCycle.get().getActiveRequestHandler());
            }
        }
    }
}