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package com.taobao.diamond.utils;

import java.io.File;

public class AppNameUtils {

    private static final String PARAM_MARKING_PROJECT = "project.name";
    private static final String PARAM_MARKING_JBOSS = "jboss.server.home.dir";
    private static final String PARAM_MARKING_JETTY = "jetty.home";
    private static final String PARAM_MARKING_TOMCAT = "catalina.base";

    private static final String LINUX_ADMIN_HOME = "/home/admin/";
    private static final String SERVER_JBOSS = "jboss";
    private static final String SERVER_JETTY = "jetty";
    private static final String SERVER_TOMCAT = "tomcat";
    private static final String SERVER_UNKNOWN = "unknown server";
    
	public static String getAppName() {
		String appName = null;

		appName = getAppNameByProjectName();
		if (appName != null) {
			return appName;
		}

		appName = getAppNameByServerHome();
		if (appName != null) {
			return appName;
		}

		return "unknown";
	}


    private static String getAppNameByProjectName() {
        return System.getProperty(PARAM_MARKING_PROJECT);
    }


    private static String getAppNameByServerHome() {
        String serverHome = null;
        if (SERVER_JBOSS.equals(getServerType())) {
            serverHome = System.getProperty(PARAM_MARKING_JBOSS);
        }
        else if (SERVER_JETTY.equals(getServerType())) {
            serverHome = System.getProperty(PARAM_MARKING_JETTY);
        }
        else if (SERVER_TOMCAT.equals(getServerType())) {
            serverHome = System.getProperty(PARAM_MARKING_TOMCAT);
        }

        if (serverHome != null && serverHome.startsWith(LINUX_ADMIN_HOME)) {
            return StringUtils.substringBetween(serverHome, LINUX_ADMIN_HOME, File.separator);
        }

        return null;
    }

    private static String getServerType() {
        String serverType = null;
        if (System.getProperty(PARAM_MARKING_JBOSS) != null) {
            serverType = SERVER_JBOSS;
        }
        else if (System.getProperty(PARAM_MARKING_JETTY) != null) {
            serverType = SERVER_JETTY;
        }
        else if (System.getProperty(PARAM_MARKING_TOMCAT) != null) {
            serverType = SERVER_TOMCAT;
        }
        else {
            serverType = SERVER_UNKNOWN;
        }
        return serverType;
    }

}