小编yuc*_*eel的帖子

我正在使用digitalocean并尝试在ubuntu上安装和启动tomcat但不幸的是我不能这样做.(创造了新的水滴并尝试了10次)

1GB Ram 30GB SSD Disk Amsterdam 2 Ubuntu 14.04 x64

当我启动tomcat时,它说"Tomcat启动".但我无法从浏览器访问页面.和./shutdown.sh返回错误.

可能是什么问题？

我现在注意到了什么.在我写这个问题时,会显示tomcat页面.显示页面花了28分钟

catalina.out说:INFO:使用[SHA1PRNG]为会话ID生成创建SecureRandom实例花了[1,718,769]毫秒.

以下是我的安装步骤(这些步骤适用于不同的vps,但不适用于digitalocean飞沫):

安装oracle jdk

 sudo apt-get install python-software-properties
 sudo add-apt-repository ppa:webupd8team/java
 sudo apt-get update
 sudo apt-get install oracle-java7-installer
 sudo apt-get install oracle-java7-set-default
      java -version
      java version "1.7.0_72"
      Java(TM) SE Runtime Environment (build 1.7.0_72-b14)
      Java HotSpot(TM) 64-Bit Server VM (build 24.72-b04, mixed mode)

设置java路径

      sudo nano /etc/environment
      JAVA_HOME="/usr/lib/jvm/java-7-oracle"
      source /etc/environment
      wget http://ftp.itu.edu.tr/Mirror/Apache/tomcat/tomcat-7/v7.0.56/bin/apache-tomcat-7.0.56.tar.gz
      tar xvzf apache-tomcat-7.0.56.tar.gz
      mv apache-tomcat-7.0.56/ apache-tomcat-7.0.56-server-1/

启动Tomcat

        ./startup.sh
            Using CATALINA_BASE:   /usr/local/apache-tomcat-7.0.56-server-1
            Using CATALINA_HOME:   /usr/local/apache-tomcat-7.0.56-server-1 …

在我的场景中,集合中有作者,每个作者都有,作者的messages每个消息都可以events.每个演员只允许执行一次动作.

db.people.ensureIndex({messages.messageEvents.eventName: 1, messages.messageEvents.actorId: 1}, {unique: true});

我添加了索引,但没有效果.正如你看到下面,我的文档有哪些具备三个要素"eventName":"vote",并"actorId":"1234"应该是对我的约束.

如何messageEvents根据eventName和actorId字段确保数组中的唯一项？

实际上,我需要在没有第二次搜索和更新事件的情况下更新现有项目,而不是拒绝它.

{
  "_id": "1234567",
  "authorPoint": 0,
  "messages": [
    {
      "messageId": "112",
      "messageType": "Q",
      "messagePoint": 0,
      "messageEvents": [
        {
          "eventName": "Add",
          "actorId": "1234",
          "detail": ""
        },
        {
          "eventName": "Vote",
          "actorId": "1234",
          "detail": "up"
        },
        {
          "eventName": "Vote",
          "actorId": "1234",
          "detail": "down"
        },
        {
          "eventName": "Vote",
          "actorId": "1234",
          "detail": "cork"
        }
      ]
    }
  ]
}

这是SpringMVC Controller代码片段:

@RequestMapping(value = "/getCityList", method = RequestMethod.POST)
public @ResponseBody LinkedHashMap<String, String> getCityList(@RequestParam(value = "countryCode") String countryCode, HttpServletRequest request) throws Exception {
    //gets ordered city list of country  [sorted by city name]
    LinkedHashMap<String, String> cityList = uiOperationsService.getCityList(countryCode); 

    for (String s : cityList.values()) {
        System.out.println(s); //prints sorted list  [sorted by name]
    }
    return cityList;
}

这是ajax调用:

function fillCityList(countryCode) {
        $.ajax({
            type: "POST",
            url: '/getCityList',
            data: {countryCode:countryCode},
            beforeSend:function(){
                $('#city').html("<option value=''>-- SELECT --</option>" );
            }
        }).done(function (data) {

            console.log(data); // UNSORTED JSON STRING …