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  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
:: Spring Initializr ::  https://start.spring.io

This service generates quickstart projects that can be easily customized.
Possible customizations include a project's dependencies, Java version, and

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Internet Scale Services Checklist

A checklist for designing and developing internet scale services, inspired by James Hamilton's 2007 paper "On Desgining and Deploying Internet-Scale Services."

• http://mvdirona.com/jrh/talksandpapers/jamesrh_lisa.pdf

Basic tenets

• Does the design expect failures to happen regularly and handle them gracefully?
• Have we kept things as simple as possible?

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package com.example;

import com.datastax.driver.core.*;
import com.datastax.driver.core.querybuilder.Assignment;
import com.datastax.driver.core.querybuilder.QueryBuilder;
import com.datastax.driver.core.querybuilder.Update;
import com.datastax.driver.core.schemabuilder.SchemaBuilder;
import com.datastax.driver.core.utils.UUIDs;
import lombok.Data;

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package com.example;

import com.datastax.driver.core.*;
import com.datastax.driver.core.querybuilder.QueryBuilder;
import com.datastax.driver.core.schemabuilder.SchemaBuilder;
import com.datastax.driver.core.utils.UUIDs;
import lombok.Data;

import java.util.*;

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package com.example;

import com.datastax.driver.core.*;
import com.datastax.driver.core.querybuilder.QueryBuilder;
import com.datastax.driver.core.schemabuilder.SchemaBuilder;
import com.datastax.driver.core.utils.UUIDs;
import lombok.Data;

import java.util.*;

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后台工程师

职责描述：

负责环信后台服务器程序的架构设计和开发


任职要求：
1. 5年以上java开发工作经验，具有服务器开发工作经验者优先；
2. 深入了解java开发工具及主流开发框架，具有扎实的技术功底，熟悉主流技术架构；

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%%%-------------------------------------------------------------------
%%% File    : mod_message_log.erl
%%% Author  : Holger Weiss <holger@zedat.fu-berlin.de>
%%% Purpose : Log one line per message transmission
%%% Created : 27 May 2014 by Holger Weiss <holger@zedat.fu-berlin.de>
%%%-------------------------------------------------------------------

-module(mod_message_log).
-author('holger@zedat.fu-berlin.de').

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%%%-------------------------------------------------------------------
%%% File    : mod_message_log.erl
%%% Author  : Holger Weiss <holger@zedat.fu-berlin.de>
%%% Purpose : Log one line per message transmission
%%% Created : 27 May 2014 by Holger Weiss <holger@zedat.fu-berlin.de>
%%%-------------------------------------------------------------------

-module(mod_message_log).
-author('holger@zedat.fu-berlin.de').

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%%%-------------------------------------------------------------------
%%% File    : mod_message_log.erl
%%% Author  : Holger Weiss <holger@zedat.fu-berlin.de>
%%% Purpose : Log one line per message transmission
%%% Created : 27 May 2014 by Holger Weiss <holger@zedat.fu-berlin.de>
%%%-------------------------------------------------------------------

-module(mod_message_log).
-author('holger@zedat.fu-berlin.de').

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GPG

GPG 主要有两个作用, 签名和加密, 具体信息参见这里

签名

签名主要是为了确定对方是谁, 例如, A 给 B发送了一个电子邮件, 或者文件, 那么B怎么知道这个确实是A发出来的, 而不是别人冒名顶替呢, 还有, 这个信息是否在发送的中间被别人修改过呢?

这时候, A可以在发送文件的时候, 对这个文件使用GPG做一个签名