Graph Easy

Graph::Easy lets you generate graphs consisting of various shaped nodes connected by edges (with optional labels).

It can read and write graphs in a variety of formats, as well as render them via its own grid-based layouter.

Since the layouter works on a grid (manhattan layout), the output is most useful for flow charts, network diagrams, or hierarchy trees.

语法

下载安装

  • 命令行

mac 几行命令搞定。

  [plaintext]
1
2
3
4
5
6
7
8
# 1. 
brew install graphviz

# 2. 安装 cpan，一路「回车」
cpan

# 3. 安装 Graph Easy
sudo cpan Graph:Easy
  • 下载 & 解压

下载

加压后进入文件夹：

  [plaintext]
1
2
3
4
5
6
7
8
$ pwd
/Users/houbinbin/Downloads/Graph-Easy-0.76

$ ls
Build.PL	MANIFEST	Makefile.PL	bin		scripts
CHANGES		MANIFEST.SKIP	README		examples	t
INSTALL		META.json	TODO		inc
LICENSE		META.yml	bench		lib
  • 安装
  [plaintext]
1
2
3
4
5
$ perl Makefile.PL 
# 执行测试
$ make test 
# 测试全部ok后,用超级用户安装
$ sudo make install
  • 测试信息
  [plaintext]
1
2
3
4
$ graph-easy --version
Graph::Easy v0.76  (c) by Tels 2004-2008.  Released under the GPL 2.0 or later.

Running under Perl v5.018002.

使用

  • 执行命令
  [plaintext]
1
$   echo "[ Bonn ] -> [ Berlin ] [ Berlin ] -> [ Frankfurt ] { border: 1px dotted black; } [ Frankfurt ] -> [ Dresden ] [ Berlin ] ..> [ Potsdam ] [ Potsdam ] => [ Cottbus ]" | graph-easy
  • 效果
  [plaintext]
1
2
3
4
5
6
7
8
9
+------+     +---------+     .............     +---------+
| Bonn | --> | Berlin  | --> : Frankfurt : --> | Dresden |
+------+     +---------+     :...........:     +---------+
               :
               :
               v
             +---------+     +-----------+
             | Potsdam | ==> |  Cottbus  |
             +---------+     +-----------+

其他例子

  [plaintext]
1
2
3
echo "[ DB-M1 ] - 4 -> [ DB-M2 ] [ DB-M2 ] - 4 -> [ DB-M1 ]" | graph-easy
echo "[ DB-M1 ] <-> [ DB-M2 ] " | graph-easy
echo "[ DB-M1 ] - 4 -> [ DB-M2 ] [ DB-M1 ] . (1,2,3,4) .> [ M1-insert ] [ DB-M2 ] . (1,2,3,4) .> [ M2-insert ] [ DB-M2 ] - 4 -> [ DB-M1 ]" | graph-easy

or

  [plaintext]
1
2
3
graph-easy <<< '[ DB-Master ] - 4 -> [ DB-Shadow Master ] [ DB-Master ] . (1,2,3,4) .> [ Master-insert ] [ DB-Shadow Master ] '

graph-easy <<< '[ DB-Master ] - 4 -> [ DB-Shadow Master ] [ DB-Master ] . (1,2,3,4) .> [ Master-insert ] [ DB-Shadow Master ] [ DB-Master ] - 网络抖动，故障转移 -> [ DB-Shadow Master ]'

自用的例子

  [plaintext]
1
graph-easy <<< '[ 服务层 ] - (如果是写操作) -> [ 主数据库 ] [ 服务层 ] - (如果是读操作) -> [ 从数据库 ]'
  • hash 分片
  [plaintext]
1
graph-easy <<< '[ user-service ] - (%2==1) -> [ db1 ] [ user-service ] - (%2==0) -> [ db2 ]'

流程控制

  • 垂直拆分
  [plaintext]
1
graph-easy <<< '[ user-center ] { flow: down; } -> [ user-db ]'
  • 多表 join
  [plaintext]
1
graph-easy <<< 'graph { flow: up; } [ user-base ], [ user-ext ] --> { end: back,0; } [ user-service ]'
  • 水平拆分
  [plaintext]
1
graph-easy <<< 'graph { flow: down; } [user-center] - (0-10W) -> [user-db1] [user-center] - (10W-20W) -> [user-db2]'
  • 前后端分离
  [plaintext]
1
graph-easy <<< 'graph { flow: down; } [用户前台] -> [user-center] --> { start: front,0; } [user-db1],[user-db2],[user-db3]'
  • 多对多服务
  [plaintext]
1
graph-easy <<< '[Application] - 1 ->  [f-service] - 4 -> [Application] [f-service] - 2 -> [BD-T1] [f-service] {flow:down;}- 3 ->[esb] - 5 -> [data-center] - 6 -> [ DB-T2 ]'

方案 2

  [plaintext]
1
graph-easy <<< '[Application] - 1 ->  [f-service] - 3 -> [Application] [f-service] - 2 -> [BD-T1] [f-service] {flow:down;}- 4 ->[log] - 5 -> [service] - 6 -> [ DB-T2 ]'
  • 数据一致性
  [plaintext]
1
graph-easy <<< '[f-service]{flow:down;}--> { start: front,0; }[BD-T1], [DB-T2] [Pair check]{flow:up;}--> { start: front,0; }[BD-T1], [DB-T2]'
  • database
  [plaintext]
1
graph-easy <<< '[service-A] - put ->  [cache] - get -> [service-B]
  [plaintext]
1
graph-easy <<< '[service] - Put ->  [cache] [service] - Update ->  [cache] [service] - Apply ->  [sso]'

参考资料

https://www.jianshu.com/p/54255050d42f

https://juejin.im/post/5a09c43451882535c56c6bbf