common.web.controller.StatisticController.java Source code

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Here is the source code for common.web.controller.StatisticController.java

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/*
 *  Copyright 2010 demchuck.dima@gmail.com
 *
 *  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.
 */

package common.web.controller;

import common.cms.ICmsConfig;
import java.lang.management.ManagementFactory;
import java.lang.reflect.Method;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;

/**
 *
 * @author demchuck.dima@gmail.com
 */
public class StatisticController implements Controller {
    private ICmsConfig conf;

    protected String content_url;
    protected String navigation_url;

    public void init() {
        StringBuilder sb = new StringBuilder();
        common.utils.MiscUtils.checkNotNull(conf, "conf", sb);
        common.utils.MiscUtils.checkNotNull(content_url, "content_url", sb);
        common.utils.MiscUtils.checkNotNull(navigation_url, "navigation_url", sb);
        if (sb.length() > 0) {
            throw new NullPointerException(sb.toString());
        }
    }

    @Override
    public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
        request.setAttribute(conf.getContentUrlAttribute(), content_url);
        request.setAttribute(conf.getNavigationUrlAttribute(), navigation_url);

        request.setAttribute("title", "?");
        request.setAttribute("top_header", "?");

        createModel(request);

        return new ModelAndView(conf.getTemplateUrl());
    }

    public void createModel(HttpServletRequest request) {
        long[] result = new long[16];
        boolean ok = false;
        try {
            String methodName = "info";
            Class paramTypes[] = new Class[1];
            paramTypes[0] = result.getClass();
            Object paramValues[] = new Object[1];
            paramValues[0] = result;
            Method method = Class.forName("org.apache.tomcat.jni.OS").getMethod(methodName, paramTypes);
            method.invoke(null, paramValues);
            ok = true;
        } catch (Throwable t) {
            // Ignore
        }

        if (ok) {
            Long time_kernel = Long.valueOf(result[11] / 1000);
            Long time_user = Long.valueOf(result[12] / 1000);
            Long time_work = Long.valueOf(System.currentTimeMillis() - result[10] / 1000);
            Double percent_work = new Double((double) time_user * (double) 100 / (double) time_work);
            request.setAttribute("time_user", formatTime(time_user, ok));
            request.setAttribute("time_kernel", formatTime(time_kernel, ok));
            request.setAttribute("time_work", formatTime(time_work, ok));
            request.setAttribute("percent_work", percent_work);
        }
    }

    /**
     * Display the given time in ms, either as ms or s.
     *
     * @param seconds true to display seconds, false for milliseconds
     */
    public static String formatTime(Object obj, boolean seconds) {

        long time = -1L;

        if (obj instanceof Long) {
            time = ((Long) obj).longValue();
        } else if (obj instanceof Integer) {
            time = ((Integer) obj).intValue();
        }

        if (seconds) {
            return ((((float) time) / 1000) + " s");
        } else {
            return (time + " ms");
        }
    }

    public void setConfig(ICmsConfig conf) {
        this.conf = conf;
    }

    public void setContent_url(String value) {
        this.content_url = value;
    }

    public void setNavigation_url(String value) {
        this.navigation_url = value;
    }

}