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活动图(新语法)

当前活动图(activity diagram)的语法有诸多限制和缺点,比如代码难以维护。

所以从V7947开始提出一种全新的、更好的语法格式和软件实现供用户使用(beta版)。

就像序列图一样,新的软件实现的另一个优点是它不再依赖于Graphviz。

新的语法将会替换旧的语法。然而考虑到兼容性,旧的语法仍被能够使用以确保向前兼容

但是我们鼓励用户使用新的语法格式。

Activity Diagram (new)

Old syntax for activity diagram had several limitations and drawbacks (for example, it's difficult to maintain).

So a completely new syntax and implementation is now available to users. Another advantage of this implementation is that it's done without the need of having Graphviz installed (as for sequence diagrams).

This syntax will replace the old legacy one. However, for compatibility reason, the old syntax will still be recognized, to ensure ascending compatibility.

Users are simply encouraged to migrate to the new syntax.

简单活动图

活动标签(activity label)以冒号开始,以分号结束。

文本格式支持creole wiki语法。

活动默认安装它们定义的顺序就行连接。

@startuml
:Hello world;
:This is on defined on
several **lines**;
@enduml

Simple action

Activities label starts with : and ends with ;.

Text formatting can be done using creole wiki syntax.

They are implicitly linked in their definition order.

@startuml
:Hello world;
:This is defined on
several **lines**;
@enduml

开始/结束

你可以使用关键字startstop表示图示的开始和结束。

@startuml
start
:Hello world;
:This is on defined on
several **lines**;
stop
@enduml

也可以使用 end 关键字。

@startuml
start
:Hello world;
:This is on defined on
several **lines**;
end
@enduml

Start/Stop/End

You can use start and stop keywords to denote the beginning and the end of a diagram.

@startuml
start
:Hello world;
:This is defined on
several **lines**;
stop
@enduml

You can also use the end keyword.

@startuml
start
:Hello world;
:This is defined on
several **lines**;
end
@enduml

条件语句

在图示中可以使用关键字ifthenelse设置分支测试。标注文字则放在括号中。

@startuml

start

if (Graphviz installed?) then (yes)
  :process all\ndiagrams;
else (no)
  :process only
  __sequence__ and __activity__ diagrams;
endif

stop

@enduml

也可以使用关键字elseif设置多个分支测试。

@startuml
start
if (condition A) then (yes)
  :Text 1;
elseif (condition B) then (yes)
  :Text 2;
  stop
elseif (condition C) then (yes)
  :Text 3;
elseif (condition D) then (yes)
  :Text 4;
else (nothing)
  :Text else;
endif
stop
@enduml

Conditional

You can use if, then and else keywords to put tests in your diagram. Labels can be provided using parentheses.

The 3 syntaxes are possible:
  • if (...) then (...)

@startuml

start

if (Graphviz installed?) then (yes)
  :process all\ndiagrams;
else (no)
  :process only
  __sequence__ and __activity__ diagrams;
endif

stop

@enduml

  • if (...) is (...) then

@startuml
if (color?) is (<color:red>red) then
:print red;
else 
:print not red;
@enduml

  • if (...) equals (...) then

@startuml
if (counter?) equals (5) then
:print 5;
else 
:print not 5;
@enduml

[Ref. QA-301]

Several tests (horizontal mode)

You can use the elseif keyword to have several tests (by default, it is the horizontal mode):

@startuml
start
if (condition A) then (yes)
  :Text 1;
elseif (condition B) then (yes)
  :Text 2;
  stop
elseif (condition C) then (yes)
  :Text 3;
elseif (condition D) then (yes)
  :Text 4;
else (nothing)
  :Text else;
endif
stop
@enduml

Several tests (vertical mode)

You can use the command !pragma useVerticalIf on to have the tests in vertical mode:

@startuml
!pragma useVerticalIf on
start
if (condition A) then (yes)
  :Text 1;
elseif (condition B) then (yes)
  :Text 2;
  stop
elseif (condition C) then (yes)
  :Text 3;
elseif (condition D) then (yes)
  :Text 4;
else (nothing)
  :Text else;
endif
stop
@enduml

[Ref. QA-3931]

Conditional with stop on an action [kill, detach]

You can stop action on a if loop.

@startuml
if (condition?) then
  :error;
  stop
endif
#palegreen:action;
@enduml

But if you want to stop at an precise action, you can use the kill or detach keyword:

  • kill

@startuml
if (condition?) then
  #pink:error;
  kill
endif
#palegreen:action;
@enduml

[Ref. QA-265]

  • detach

@startuml
if (condition?) then
  #pink:error;
  detach
endif
#palegreen:action;
@enduml

重复循环

你可以使用关键字repeatrepeatwhile进行重复循环。

@startuml

start

repeat
  :read data;
  :generate diagrams;
repeat while (more data?)

stop

@enduml

It is also possible to use a full action as repeat target and insert an action in the return path using the backward keyword.

@startuml

start

repeat :foo as starting label;
  :read data;
  :generate diagrams;
backward:This is backward;
repeat while (more data?)

stop

@enduml

Repeat loop

You can use repeat and repeatwhile keywords to have repeat loops.

@startuml

start

repeat
  :read data;
  :generate diagrams;
repeat while (more data?) is (yes)
->no;
stop

@enduml

It is also possible to use a full action as repeat target and insert an action in the return path using the backward keyword.

@startuml

start

repeat :foo as starting label;
  :read data;
  :generate diagrams;
backward:This is backward;
repeat while (more data?)

stop

@enduml

Break on a repeat loop [break]

You can break after an action on a loop.

@startuml
start
repeat
  :Test something;
    if (Something went wrong?) then (no)
      #palegreen:OK;
      break
    endif
    ->NOK;
    :Alert "Error with long text";
repeat while (Something went wrong with long text?) is (yes)
->no;
:Alert "Sucess";
stop
@enduml

[Ref. QA-6105]

while循环

可以使用关键字whileend while进行while循环。

@startuml

start

while (data available?)
  :read data;
  :generate diagrams;
endwhile

stop

@enduml

还可以在关键字endwhile后添加标注,还有一种方式是使用关键字is

@startuml
while (check filesize ?) is (not empty)
  :read file;
endwhile (empty)
:close file;
@enduml

While loop

You can use while and end while keywords to have repeat loops.

@startuml

start

while (data available?)
  :read data;
  :generate diagrams;
endwhile

stop

@enduml

It is possible to provide a label after the endwhile keyword, or using the is keyword.

@startuml
while (check filesize ?) is (not empty)
  :read file;
endwhile (empty)
:close file;
@enduml

并行处理

你可以使用关键字forkfork againend fork表示并行处理。

@startuml

start

if (multiprocessor?) then (yes)
  fork
    :Treatment 1;
  fork again
    :Treatment 2;
  end fork
else (monoproc)
  :Treatment 1;
  :Treatment 2;
endif

@enduml

Parallel processing

You can use fork, fork again and end fork keywords to denote parallel processing.

@startuml

start

if (multiprocessor?) then (yes)
  fork
    :Treatment 1;
  fork again
    :Treatment 2;
  end fork
else (monoproc)
  :Treatment 1;
  :Treatment 2;
endif

@enduml

Split processing

Split

You can use split, split again and end split keywords to denote split processing.

@startuml
start
split
   :A;
split again
   :B;
split again
   :C;
split again
   :a;
   :b;
end split
:D;
end
@enduml

Input split (multi-start)

You can use hidden arrows to make an input split (multi-start):

@startuml
split
   -[hidden]->
   :A;
split again
   -[hidden]->
   :B;
split again
   -[hidden]->
   :C;
end split
:D;
@enduml

@startuml
split
   -[hidden]->
   :A;
split again
   -[hidden]->
   :a;
   :b;
split again
   -[hidden]->
   (Z)
end split
:D;
@enduml

[Ref. QA-8662]

Output split (multi-end)

You can use kill or detach to make an output split (multi-end):

@startuml
start
split
   :A;
   kill
split again
   :B;
   detach
split again
   :C;
   kill
end split
@enduml

@startuml
start
split
   :A;
   kill
split again
   :b;
   :c;
   detach
split again
   (Z)
   detach
split again
   end
split again
   stop
end split
@enduml

注释

文本格式支持creole wiki语法。

A note can be floating, using floating keyword.

@startuml

start
:foo1;
floating note left: This is a note
:foo2;
note right
  This note is on several
  //lines// and can
  contain <b>HTML</b>
  ====
  * Calling the method ""foo()"" is prohibited
end note
stop

@enduml

Notes

Text formatting can be done using creole wiki syntax.

A note can be floating, using floating keyword.

@startuml

start
:foo1;
floating note left: This is a note
:foo2;
note right
  This note is on several
  //lines// and can
  contain <b>HTML</b>
  ====
  * Calling the method ""foo()"" is prohibited
end note
stop

@enduml

You can add note on backward activity.

@startuml
start
repeat :Enter data;
:Submit;
backward :Warning;
note right: Note
repeat while (Valid?) is (No) not (Yes)
stop
@enduml

[Ref. QA-11788]

颜色

你可以为活动(activity)指定一种颜色

@startuml

start
:starting progress;
#HotPink:reading configuration files
These files should edited at this point!;
#AAAAAA:ending of the process;

@enduml

Colors

You can specify a color for some activities.

@startuml

start
:starting progress;
#HotPink:reading configuration files
These files should be edited at this point!;
#AAAAAA:ending of the process;

@enduml

Lines without arrows

You can use skinparam ArrowHeadColor none in order to connect activities using lines only, without arrows.

@startuml
skinparam ArrowHeadColor none
start
:Hello world;
:This is on defined on
several **lines**;
stop
@enduml

@startuml
skinparam ArrowHeadColor none
start
repeat :Enter data;
:Submit;
backward :Warning;
repeat while (Valid?) is (No) not (Yes)
stop
@enduml

箭头

使用->标记,你可以给箭头添加文字或者修改箭头颜色

同时,你也可以选择点状 (dotted),条状(dashed),加粗或者是隐式箭头

@startuml
:foo1;
-> You can put text on arrows;
if (test) then
  -[#blue]->
  :foo2;
  -[#green,dashed]-> The text can
  also be on several lines
  and **very** long...;
  :foo3;
else
  -[#black,dotted]->
  :foo4;
endif
-[#gray,bold]->
:foo5;
@enduml

Arrows

Using the -> notation, you can add texts to arrow, and change their color.

It's also possible to have dotted, dashed, bold or hidden arrows.

@startuml
:foo1;
-> You can put text on arrows;
if (test) then
  -[#blue]->
  :foo2;
  -[#green,dashed]-> The text can
  also be on several lines
  and **very** long...;
  :foo3;
else
  -[#black,dotted]->
  :foo4;
endif
-[#gray,bold]->
:foo5;
@enduml

连接器(Connector)

你可以使用括号定义连接器。

@startuml
start
:Some activity;
(A)
detach
(A)
:Other activity;
@enduml

Connector

You can use parentheses to denote connector.

@startuml
start
:Some activity;
(A)
detach
(A)
:Other activity;
@enduml

Color on connector

You can add color on connector.

@startuml
start
:The connector below
wishes he was blue;
#blue:(B)
:This next connector
feels that she would
be better off green;
#green:(G)
stop
@enduml

[Ref. QA-10077]

组合(grouping)

通过定义分区(partition),你可以把多个活动组合(group)在一起。

@startuml
start
partition Initialization {
    :read config file;
    :init internal variable;
}
partition Running {
    :wait for user interaction;
    :print information;
}

stop
@enduml

WARNING
 This translation need to be updated. 
WARNING

Grouping or partition

You can group activity together by defining partition:

@startuml
start
partition Initialization {
    :read config file;
    :init internal variable;
}
partition Running {
    :wait for user interaction;
    :print information;
}

stop
@enduml

泳道(Swimlanes)

你可以使用管道符|来定义泳道。

还可以改变泳道的颜色

@startuml
|Swimlane1|
start
:foo1;
|#AntiqueWhite|Swimlane2|
:foo2;
:foo3;
|Swimlane1|
:foo4;
|Swimlane2|
:foo5;
stop
@enduml

Swimlanes

Using pipe |, you can define swimlanes.

It's also possible to change swimlanes color.

@startuml
|Swimlane1|
start
:foo1;
|#AntiqueWhite|Swimlane2|
:foo2;
:foo3;
|Swimlane1|
:foo4;
|Swimlane2|
:foo5;
stop
@enduml

You can add if conditional or repeat or while loop within swimlanes.

@startuml
|#pink|Actor_For_red|
start
if (color?) is (red) then
#pink:**action red**;
:foo1;
else (not red)
|#lightgray|Actor_For_no_red|
#lightgray:**action not red**;
:foo2;
endif
|Next_Actor|
#lightblue:foo3;
:foo4;
|Final_Actor|
#palegreen:foo5;
stop
@enduml

分离(detach)

可以使用关键字detach移除箭头。

@startuml
 :start;
 fork
   :foo1;
   :foo2;
 fork again
   :foo3;
   detach
 endfork
 if (foo4) then
   :foo5;
   detach
 endif
 :foo6;
 detach
 :foo7;
 stop
@enduml

Detach or kill [detach, kill]

It's possible to remove an arrow using the detach or kill keyword:

  • detach

@startuml
 :start;
 fork
   :foo1;
   :foo2;
 fork again
   :foo3;
   detach
 endfork
 if (foo4) then
   :foo5;
   detach
 endif
 :foo6;
 detach
 :foo7;
 stop
@enduml

  • kill

@startuml
 :start;
 fork
   :foo1;
   :foo2;
 fork again
   :foo3;
   kill
 endfork
 if (foo4) then
   :foo5;
   kill
 endif
 :foo6;
 kill
 :foo7;
 stop
@enduml

特殊领域语言(SDL)

通过修改活动标签最后的分号分隔符(;),可以为活动设置不同的形状。
  • |
  • <
  • >
  • /
  • ]
  • }

@startuml
:Ready;
:next(o)|
:Receiving;
split
 :nak(i)<
 :ack(o)>
split again
 :ack(i)<
 :next(o)
 on several line|
 :i := i + 1]
 :ack(o)>
split again
 :err(i)<
 :nak(o)>
split again
 :foo/
split again
 :i > 5}
stop
end split
:finish;
@enduml

SDL (Specification and Description Language)

By changing the final ; separator, you can set different rendering for the activity:
  • |
  • <
  • >
  • /
  • \\
  • ]
  • }

@startuml
:Ready;
:next(o)|
:Receiving;
split
 :nak(i)<
 :ack(o)>
split again
 :ack(i)<
 :next(o)
 on several lines|
 :i := i + 1]
 :ack(o)>
split again
 :err(i)<
 :nak(o)>
split again
 :foo/
split again
 :bar\\
split again
 :i > 5}
stop
end split
:finish;
@enduml

一个完整的例子

@startuml

start
:ClickServlet.handleRequest();
:new page;
if (Page.onSecurityCheck) then (true)
  :Page.onInit();
  if (isForward?) then (no)
    :Process controls;
    if (continue processing?) then (no)
      stop
    endif

    if (isPost?) then (yes)
      :Page.onPost();
    else (no)
      :Page.onGet();
    endif
    :Page.onRender();
  endif
else (false)
endif

if (do redirect?) then (yes)
  :redirect process;
else
  if (do forward?) then (yes)
    :Forward request;
  else (no)
    :Render page template;
  endif
endif

stop

@enduml

Complete example

@startuml

start
:ClickServlet.handleRequest();
:new page;
if (Page.onSecurityCheck) then (true)
  :Page.onInit();
  if (isForward?) then (no)
    :Process controls;
    if (continue processing?) then (no)
      stop
    endif

    if (isPost?) then (yes)
      :Page.onPost();
    else (no)
      :Page.onGet();
    endif
    :Page.onRender();
  endif
else (false)
endif

if (do redirect?) then (yes)
  :redirect process;
else
  if (do forward?) then (yes)
    :Forward request;
  else (no)
    :Render page template;
  endif
endif

stop

@enduml

Condition Style

Inside style (by default)

@startuml
skinparam conditionStyle inside
start
repeat
  :act1;
  :act2;
repeatwhile (<b>end)
:act3;
@enduml

@startuml
start
repeat
  :act1;
  :act2;
repeatwhile (<b>end)
:act3;
@enduml

Diamond style

@startuml
skinparam conditionStyle diamond
start
repeat
  :act1;
  :act2;
repeatwhile (<b>end)
:act3;
@enduml

InsideDiamond (or Foo1) style

@startuml
skinparam conditionStyle InsideDiamond
start
repeat
  :act1;
  :act2;
repeatwhile (<b>end)
:act3;
@enduml

@startuml
skinparam conditionStyle foo1
start
repeat
  :act1;
  :act2;
repeatwhile (<b>end)
:act3;
@enduml

[Ref. QA-1290 and #400]

Condition End Style

Diamond style (by default)

  • With one branch

@startuml
skinparam ConditionEndStyle diamond
:A;
if (decision) then (yes)
    :B1;
else (no)
endif
:C;
@enduml

  • With two branchs (B1, B2)

@startuml
skinparam ConditionEndStyle diamond
:A;
if (decision) then (yes)
    :B1;
else (no)
    :B2;
endif
:C;
@enduml
@enduml

Horizontal line (hline) style

  • With one branch

@startuml
skinparam ConditionEndStyle hline
:A;
if (decision) then (yes)
    :B1;
else (no)
endif
:C;
@enduml

  • With two branchs (B1, B2)

@startuml
skinparam ConditionEndStyle hline
:A;
if (decision) then (yes)
    :B1;
else (no)
    :B2;
endif
:C;
@enduml
@enduml

[Ref. QA-4015]


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