plugin-external-background/src/main/java/com/fr/plugin/external/web/ImageViewService.java

package com.fr.plugin.external.web;

import com.fr.plugin.external.ImageManager;
import com.fr.stable.StringUtils;
import com.fr.stable.fun.RequestInterceptor;
import com.fr.stable.fun.Service;
import com.fr.stable.web.ServletContext;
import com.fr.stable.web.ServletContextAdapter;
import com.fr.web.core.WebActionsDispatcher;
import com.fr.web.utils.WebUtils;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.HashMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ImageViewService implements Service{

    static {
        ServletContext.addServletContextListener(new ServletContextAdapter() {
            @Override
            public void onServletStop() {
                ImageManager.getInstance().release();
            }
        });
    }

    public ImageViewService() {
        ExecutorService executorService = Executors.newSingleThreadExecutor();
        executorService.execute(new Runnable() {
            @Override
            public void run() {
                // 预初始化
                ImageManager.getInstance();
            }
        });
    }

    private RequestInterceptor[] actions = {
        new ShowImageAction(),
        new GetAllImageInfoAction(),
        new DownloadImageAction(),
        new DeleteImageAction(),
        new UpdateImageAction()
    };

    @Override
    public String actionOP() {
        return "im";
    }

    @Override
    public void process(HttpServletRequest req, HttpServletResponse res, String op, String sessionID) throws Exception {
//        if (isAdmin(req)) {
//            WebUtils.printAsString(res, "Please log on as an admin, and then try again.");
//            return;
//        }

        String cmd = WebUtils.getHTTPRequestParameter(req, "cmd");
        if (StringUtils.isEmpty(cmd)) {
            String errorTemplate = "/com/fr/plugin/external/web/ui/im/manager.html";
            WebUtils.writeOutTemplate(errorTemplate, res, new HashMap());
        } else {
            WebActionsDispatcher.dealForActionCMD(req, res, sessionID, actions);
        }
    }

}