com.alibaba.dubbo.container.page.pages.SystemPageHandler Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of dubbo2 Show documentation
The all in one project of dubbo2
The newest version!
/*
 * Copyright 1999-2011 Alibaba Group.
 *  
 * 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 com.alibaba.dubbo.container.page.pages;

import java.lang.management.ManagementFactory;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Locale;

import com.alibaba.dubbo.common.URL;
import com.alibaba.dubbo.common.Version;
import com.alibaba.dubbo.common.utils.NetUtils;
import com.alibaba.dubbo.container.page.Menu;
import com.alibaba.dubbo.container.page.Page;
import com.alibaba.dubbo.container.page.PageHandler;

/**
 * SystemPageHandler
 * 
 * @author william.liangf
 */
@Menu(name = "System", desc = "Show system environment information.", order = Integer.MAX_VALUE - 10000)
public class SystemPageHandler implements PageHandler {

    public Page handle(URL url) {
        List> rows = new ArrayList>();
        List row;
        
        row = new ArrayList();
        row.add("Version");
        row.add(Version.getVersion(SystemPageHandler.class, "2.0.0"));
        rows.add(row);

        row = new ArrayList();
        row.add("Host");
        String address = NetUtils.getLocalHost();
        row.add(NetUtils.getHostName(address) + "/" + address);
        rows.add(row);
        
        row = new ArrayList();
        row.add("OS");
        row.add(System.getProperty("os.name") + " " + System.getProperty("os.version"));
        rows.add(row);
        
        row = new ArrayList();
        row.add("JVM");
        row.add(System.getProperty("java.runtime.name") + " " + System.getProperty("java.runtime.version") + ",
" + System.getProperty("java.vm.name") + " " + System.getProperty("java.vm.version") + " " + System.getProperty("java.vm.info", ""));
        rows.add(row);
        
        row = new ArrayList();
        row.add("CPU");
        row.add(System.getProperty("os.arch", "") + ", " + String.valueOf(Runtime.getRuntime().availableProcessors()) + " cores");
        rows.add(row);
        
        row = new ArrayList();
        row.add("Locale");
        row.add(Locale.getDefault().toString() + "/" + System.getProperty("file.encoding"));
        rows.add(row);
        
        row = new ArrayList();
        row.add("Uptime");
        row.add(formatUptime(ManagementFactory.getRuntimeMXBean().getUptime()));
        rows.add(row);

        row = new ArrayList();
        row.add("Time");
        row.add(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS Z").format(new Date()));
        rows.add(row);
        
        return new Page("System", "System", new String[] {
                "Property", "Value" }, rows);
    }

    private static final long SECOND = 1000;
    
    private static final long MINUTE = 60 * SECOND;
    
    private static final long HOUR = 60 * MINUTE;
    
    private static final long DAY = 24 * HOUR;
    
    private String formatUptime(long uptime) {
        StringBuilder buf = new StringBuilder();
        if (uptime > DAY) {
            long days = (uptime - uptime % DAY) / DAY;
            buf.append(days);
            buf.append(" Days");
            uptime = uptime % DAY;
        }
        if (uptime > HOUR) {
            long hours = (uptime - uptime % HOUR) / HOUR;
            if (buf.length() > 0) {
                buf.append(", ");
            }
            buf.append(hours);
            buf.append(" Hours");
            uptime = uptime % HOUR;
        }
        if (uptime > MINUTE) {
            long minutes = (uptime - uptime % MINUTE) / MINUTE;
            if (buf.length() > 0) {
                buf.append(", ");
            }
            buf.append(minutes);
            buf.append(" Minutes");
            uptime = uptime % MINUTE;
        }
        if (uptime > SECOND) {
            long seconds = (uptime - uptime % SECOND) / SECOND;
            if (buf.length() > 0) {
                buf.append(", ");
            }
            buf.append(seconds);
            buf.append(" Seconds");
            uptime = uptime % SECOND;
        }
        if (uptime > 0) {
            if (buf.length() > 0) {
                buf.append(", ");
            }
            buf.append(uptime);
            buf.append(" Milliseconds");
        }
        return buf.toString();
    }
}