Ribbon

面试系列-Spring Cloud 的核心架构原理

无人久伴 提交于 2020-02-26 23:41:01
最近在补一些分布式系列的面试内容,提前做做准备吧,你们懂的,也跟大家分享分享。现在分布式系统基本上都是标配了,如果你现在还在玩儿单机,没有接触过这些东西的话,权当是为你打开一扇新的大门吧。 大的单体项目有多蛋疼 以前我们做单机系统的时候,所有的代码都在一个项目里面,只是不同的模块按照包名来划分的。我们以前做的一个某省的教育项目,有学生信息和就业系统、有高校培训系统、有一个人资系统等一共六个,4个小伙伴都在一个代码里面进行开发,各个系统之间有一定的联系,但是大部分是不相关的,但管理页面在一起。 那时候我们都在一个项目里面码代码,每次启动好几分钟,还有就是包版本冲突问题,搞得真是蛋疼。大家经历过大型的单体项目开发,相信你有体会的。 还有各系统的使用量也不一样,有的比较大。比如学生信息和就业系统,面向的是所有高校,特别是快毕业那段时间,每个学校会上报就业率等信息,还有就是打印报到证呀什么的。有的系统就使用比较少,比如人资、培训系统 使用的基本上就教育厅的一些员工,和部分老师,流量不大,勉强能扛得住。 模拟业务背景 大点的企业,比如做电商的,用户几十万的,日活几万的,背后好几十人上百人的团队在支撑开发,单体系统就不太合适了。 比如现在有一个下单买东西的需求,就需要订单系统、库存系统、仓库系统和积分系统 等来进行处理。如下图: 订单系统、库存系统、仓储和积分系统都是部署到不同的机器上的。

SpringCloud 基础教程(七)-Feign声明式服务调用

纵饮孤独 提交于 2020-02-26 17:13:08
  我的博客: 程序员笑笑生 ,欢迎浏览博客!  上一章 SpringCloud基础教程(六)-负载均衡Ribbon 当中,我们介绍了Ribbon在微服务中是如何做到负载均衡的,本期我们将在此基础上使用Fegin更加简化的实现服务间的调用。 前言  什么是Fegin,在解释之前,我们先梳理一下我们之前学习到的,在微服模式下,解决服务间的调用可以通过Grpc、HttpClient、(Spring中的resttemplate是对HttpClient的封装)等开源框架,这种调用我们称之为远程过程的调用,即RPC,那么进行RPC调用需要解决几个重要的问题,一个是序列化/反序列化,比如Json/xml等怎样序列化和反序列化等,再一个就是以什么样的协议实现这样的调用。这两个问题在开源社区都有了很好的技术方案。那么Spring Cloud Fegin主要是为了更简单的实现开发,封装了Http的调用流程,更适合面向接口化编程的习惯。我们虽然能通过Ribbon和RestTemplate通过URL进行远程调用,但是这样拼接参数,并不是特别的优雅,为此,我们可以通过使用Feign让远程调用变的更简洁。 一、快速使用Feign  我们在上几章的服务调用方server-consumer示例的pom文件中添加Feign的依赖 (我使用的spring Cloud版本是Greenwich.SR3版本

spring cloud 是什么,学习什么

二次信任 提交于 2020-02-25 21:07:18
一、什么是springcloud,有什么作用   Spring Cloud是一系列框架的有序集合。它利用Spring Boot的开发便利性巧妙地简化了分布式系统基础设施的开发,如服务发现注册、配置中心、消息总线、负载均衡、断路器、数据监控等,都可以用Spring Boot的开发风格做到一键启动和部署。 Spring Cloud是一个全家桶式的技术栈,包含了很多组件。项目实例 www.b123.com 。先从其最核心的几个组件入手,来剖析一下其底层的工作原理。也就是Eureka、Ribbon、Feign、Hystrix、Zuul这几个组件。 Eureka Eureka是微服务架构中的注册中心,专门负责服务的注册与发现。库存服务、仓储服务、积分服务中都有一个Eureka Client组件,Eureka Client这个组件专门负责将这个服务的信息注册到Eureka Server中(就是告诉Eureka Server,自己在哪台机器上,监听着哪个端口)。而Eureka Server是一个注册中心,里面有一个注册表,保存了各服务所在的机器和端口号。 订单服务里也有一个Eureka Client组件,这个Eureka Client组件会找Eureka Server问一下:库存服务在哪台机器啊?监听着哪个端口啊?仓储服务呢?积分服务呢?然后就可以把这些相关信息从Eureka

How to hide a vanilla button according to form state

亡梦爱人 提交于 2020-01-21 12:24:07
问题 I am trying to hide my SAVE vanilla button according to form state. when the form state != create the vanilla button should not display. I tried different things but nothing works: I create a function in js that returns true if form is create state function isHideState(){ formstate = Xrm.Page.ui.getFormType(); if(formstate == formType.create){ return true;} else{ return false;} } I added a disply rule and connected it to my command that relevant to the js function : my rule is : FormStateRule

Adding a button to a 3rd party ribbon tab addin

痞子三分冷 提交于 2020-01-17 03:50:34
问题 I have a 3rd party addin in word 2010 and do not have access to the source code. The addin adds a new ribbon tab and many groups in the ribbon tab generated by the 3rd party addin. I understand how to use vb2013 to create my own new ribbon tab etc. My question is, is it possible for me a create a new word 2010 addin, which somehow gets a handle on the 3rd party addin's ribbon tab and adds a button to one of the groups within the 3rd parties ribbon tab? So basically, if the 3rd party addin is

Outlook 2007 ribbon customization in .NET using VS2010; insertBeforeMso dynamic function

﹥>﹥吖頭↗ 提交于 2020-01-16 03:57:06
问题 Could anyone help me get the first tab idMso value of an opened Outlook item window? I need to dynamically set it in a ribbon xml file, since I figured out it would be redundant to add each item window into the xml code. If anyone has an existing solution to share, that would be great. Thanks 回答1: Solved it :) Just edit the return string from the GetCustomUI on runtime, but trap the explorer item first Public Function GetCustomUI(ByVal ribbonID As String) As String Implements Office

want to hide bcc field in outlook 2010 email using vba

谁说我不能喝 提交于 2020-01-16 01:22:06
问题 I'm trying to hide the Bcc field in an email that's currently being drafted in Outlook 2010 using VBA. The reason to hide it is that I'm using code to add an email address to Bcc which shows the field, but then I want the real-estate on the screen back. Here's what I have so far (in ThisOutlookSession): Sub add_bcc_to_cur_email() Dim cur_msg As MailItem Set cur_msg = ActiveInspector.CurrentItem cur_msg.BCC = "first.last@domain.com" 'this works correctly cur_msg.GetInspector.CommandBars

want to hide bcc field in outlook 2010 email using vba

岁酱吖の 提交于 2020-01-16 01:22:02
问题 I'm trying to hide the Bcc field in an email that's currently being drafted in Outlook 2010 using VBA. The reason to hide it is that I'm using code to add an email address to Bcc which shows the field, but then I want the real-estate on the screen back. Here's what I have so far (in ThisOutlookSession): Sub add_bcc_to_cur_email() Dim cur_msg As MailItem Set cur_msg = ActiveInspector.CurrentItem cur_msg.BCC = "first.last@domain.com" 'this works correctly cur_msg.GetInspector.CommandBars

Word 2007 Add-in Task Pane doesn't work in one specific case

孤街醉人 提交于 2020-01-15 03:56:07
问题 I am just starting out with a Word VSTO Add-in. I want to add a group to the ribbon, which has a button to toggle a custom task pane. I want each document to have it's own independent task pane. I have this mostly working, but there is one situation that doesn't work: Start Word - new document opened, all works fine Open existing document (closes empty document) Click on toggle button, pane doesn't appear Create new document or open ANOTHER existing document, pane appears on that document

Disable Ribbon Button

最后都变了- 提交于 2020-01-14 19:03:39
问题 I want to disable and NOT hide a ribbon button (specifically Ribbon.ListItem.New.NewListItem) on a particular List type. On web I could find a lot many posts showing me ways to remove/hide buttons but none really worthwhile which could tell me how can I just disable an alrteady existing sharepoint button in my custom List type. e.g. Following code does remove the button instead of hiding. Id="RemoveRibbonButton" RegistrationType="List" RegistrationId="213908" Location="CommandUI.Ribbon"> 回答1: