org.rivu.image.web.servlet.ServletInterceptor.java Source code

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Here is the source code for org.rivu.image.web.servlet.ServletInterceptor.java

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/**
 * Licensed to the Rivulet 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
 *     webapps/LICENSE-Rivulet-1.0
 *
 * 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 org.rivu.image.web.servlet;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2007</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
import org.apache.struts2.ServletActionContext;
import org.rivu.image.web.ServletHandler;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.transaction.TransactionDefinition;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.DefaultTransactionDefinition;
import org.springframework.web.context.WebApplicationContext;

import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

/**
 * @author jaddy0302 Rivulet ServletInterceptor.java 2010-3-3
 * 
 */
public class ServletInterceptor extends AbstractInterceptor {
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    private DefaultTransactionDefinition def = new DefaultTransactionDefinition();
    private PlatformTransactionManager transactionManager = null;
    private WebApplicationContext wac = null;
    private String ret = null;

    @Override
    public String intercept(ActionInvocation ai) throws Exception {
        Object o = ai.getAction();
        /**
         * ?
         */
        if (o instanceof ServletHandler) {
            /**
             * Request
             */
            ((ServletHandler) o).setServletRequest(ServletActionContext.getRequest());
            /**
             * Response
             */
            ((ServletHandler) o).setServletResponse(ServletActionContext.getResponse());

            ((ServletHandler) o).setAction(ai.getProxy().getNamespace(), ai.getProxy().getActionName());
            ServletActionContext.getResponse().setHeader("Pragma", "No-cache");
            ServletActionContext.getResponse().setHeader("Cache-Control", "no-cache");
            ServletActionContext.getResponse().setHeader("Cache-Control", "no-store");
            ServletActionContext.getResponse().setDateHeader("Expires", 0);
        }
        def.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);
        try {
            ret = ai.invoke();
        } catch (Exception e) {
            e.printStackTrace();
            ServletActionContext.getResponse().addHeader("emsg", e.getMessage());
            ServletActionContext.getResponse().sendError(400);
            return null;
        }
        return ret;
    }

}