Cuál es el objetivo de PlantUML?PlantUML
es usado para graficar
diagramas UML, usando una descripción de texto simple y fácil de leer por humanos.
Ten cuidado, porque no te previene de graficar diagramas inconsistentes (por ejemplo tener dos clases que hereden entre si). Entonces es más una herramienta de dibujo
que una de modelado
¿Por cuánto tiempo se guardan las imágenes generadas por PlantUML Server?
Enlaces a png o svg generados por PlantUML Server
están activos por siempre (eso es siempre y cuando el servidor esté arriba).
Sin emargo, nosotros no
almacenamos ningún diagrama en nuestros servidores.
Esto puede sonar contradictorio. No es así: El diagrama completo es comprimido en la misma URL
. Cuando el servidor recibe la URL, descomprime la URL para recuperar el texto del diagrama y generar la imagen. No hay necesidad de almacenar nada. Incluso cuando el servidor está abajo, tú puedes recuperar el diagrama usando el flag
con la linea de comando
. Adicionalmente, los datos del diagrama son alamcenados in metadata PNG, así puedes buscarlos incluso desde una imagen descargada.
Ocasionalmente podemos activar trazas HTTP en nuestro servidor. Esto es principalmente por problemas de rendimiento (cuando tenemos alguno) para entender el trafico que tenemos. Una vez el problema se resuelve, desactivamos las trazas HTTP y removemos los logs.
Observa que también contamos el numero de diagramas generados (impresos en el home page) para medir la capacidad del servidor.
Respecto a contenido sensible: incluso si no almacenamos diagramas generados, por favor ten en cuenta que todo el tráfico va a través de HTTP, por lo tanto es fácil de capturar.
Por lo tanto, tal vez deberías instalar un servidor local
en tu propia red si planeas generar diagramas con información sensible.
¡No funciona con mi configuración!PlantUML
ha sido instalado en varios sistemas, y algunos usuarios reportaron problemas menores cuando lo instalaron.
Puedes mirar en esta pagina
que te aconsejará si algo está mal.
¿Cuál versión de Graphviz debería usar ?
Acá encontrarás más información sobre Graphviz aquí
y un breve test para hacer aquí
Las siguientes versiones han sido probadas, y se sabe que funcionan:
Observa que las versiones 2.39 y 2.42 no funcionan muy bien con PlantUML
With version 2.44, under Windows, you may have to run
in a command line to finalize the installation, like in the following example:
You may have to run
with Administrator Right
Another option is to install Win32 version of GraphViz 2.44
which does not require this post-install process.
Si compilas Graphviz tu mismo, tienes que crearla con libexpat
para que funcione con PlantUML.
Is this mature? I don't see any new release ?Google Trends
are somehow positive. And there are few books that mention PlantUML
. So yes, it's mature.
Note that PlantUML
is developed with continuous integration
in mind. That means that there are new releases quite often, with (hopefully!) backward compatibility. So the file PlantUML.jar
may changed over time, while keeping the same name.
If you want to know the exact version you are using, you can type in the command line:
java -jar plantuml.jar -version
or use the following small special diagram description :
How to know if a new release is available ?
To check if a newer version is available for download, you can go to the download page
You can also subscribe to the following rss flows:
Or you can use the command line:
java -jar plantuml.jar -checkversion
This command connects to the PlantUML website, so you may have to set your proxy :
(Please note that -D flags must be set before -jar flag)
java -Dhttp.proxyHost=myproxy.com -Dhttp.proxyPort=8080 -jar plantuml.jar -checkversion
Or use the following small special diagram description :
You can also set your proxy using the following syntax :
I have an error message with the Eclipse Plugin.
If you have the following error message :
The currently displayed page contains invalid values
when displaying the Windows/Preferences/PlantUML, you should try to quit Eclipse
and use the
flag on the command line:
I want to generate huge diagrams!
PlantUML limits image width and height to 4096. There is a environment variable that you can set to override this limit:
. You have to define this variable before launching PlantUML, something like:
setenv PLANTUML_LIMIT_SIZE 8192
Another way is an option in the command line:
java -DPLANTUML_LIMIT_SIZE=8192 -jar /path/to/plantuml.jar ...
Note that if you generate very
big diagrams, (for example, something like 20 000 x 10 000 pixels), you can have some memory issues. The solution is to add this parameter to the java vm : -Xmx1024m
I have issues with accented characters.
Characters encoding is a subtle thing... By default, PlantUML use the default charset of your platform, which may or may not be UTF-8 . If you want to know which charset you are using, you can type the following command:
java -jar plantuml.jar -help
-charset XYZ To use a specific charset (default is windows-1252)
If you want to use a different charset, for example UTF-8, you can use the
java -jar plantuml.jar -charset UTF-8 ...
You can also find here information about unicode
. Note that even if Java does not support B.O.M. (Byte Order Mark) in UTF-8 format file
, a workaround has been put into PlantUML, so this should not be an issue.
I have issues with Asian characters.
Some Japanese users reported that they have to set the
in their shell before launching PlantUML.
export LANG = ja_JP.UTF-8
Since the new architecture
, it should simply work, because Java knows how to draw East Asian characters.
How to generate EPS ?
You can use the
flag in the command line, or
in the ANT task
What about XMI ?
Work is in progress
Is @startuml needed in with -pipe flag ?Short answer
: You do
have to use @startuml (or @startditaa/@startjcckit...) when starting a diagram. Long answer
The @startuml/@startditaa/@startjcckit is useful to determine the type of diagram (uml, ditaa, jcckit...), and because you can optionally put a filename after the @startXYZ. This also allows to have several diagrams inside the same file.
Earlier versions of PlantUML were not supporting ditaa or jcckit. When you use -pipe
flag, since the diagram is generated to standard output, there could be only one diagram in the standard input. And there is no need to specify a filename. For all those reasons, @startuml was not needed when using -pipe
flag at that time.
Latter, it has been decided to normalize this, and to impose @startXYZ everywhere, even with -pipe
flag, because it was confusing for users. Unfortunately, since some existing scripts were already using the fact that @startuml is not needed in -pipe
flag, it has been decided to keep this as a deprecated
option, just to allow older scripts to run. We indeed do pay attention of ascending compatibility.
For newer scripts, you should not rely on this, and use @startXYZ/@endXYZ with the -pipe
Under which license is PlantUML distributed ?
PlantUML is distributed under the GPL license
You can print the license using the command line option:
java -jar plantuml.jar -license
Or you can use the special diagram:
I don't like GPL!
You can also use:
Those versions miss few features (DITAA
for example), but are 100% able to generate UML diagrams.
You can print the license of these versions using the command line option:
java -jar plantuml.jar -license
Or you can use the special diagram:
Are images generated by PlantUML covered by the GPL/LGPL/ASL/EPL/MIT license ?
No, they are not.
Images (whatever their format : PNG, SVG...) generated by the execution
of PlantUML are owned by the author of their corresponding sources code (that is, their textual description in PlantUML language).
Images generated by the execution
of PlantUML are not
considered as covered work
. You can do whatever you want with them.
The generated images can then be used without any reference to the GPL/LGPL/ASL/EPL/MIT license. It is not even necessary to stipulate that they have been generated with PlantUML, although this will be appreciate by PlantUML team.
There is an exception : if the textual description in PlantUML language is also covered by some license (like the GPL/LGPL/ASL/EPL/MIT), then the generated images are logically covered by this license.
Can I redistribute the LGPL binary file PlantUML.jar and if there any constraints about it?
As long as you do not modify the Java source code and the jar file, you can integrate PlantUML.jar in your own closed source software.
The only constraint is that you have to mention somewhere in your own license or in your documentation that you are using PlantUML and that PlantUML is distributed under LGPL.
You can then even sell your software and earn money, without any other constraints (although donation will be appreciate
in that case
What is the license of the PlantUML syntax?
There are no license for the PlantUML syntax itself : this means that everybody can use it.
So you can use PlantUML comments into your own code : those comments are owned by yourself
, and are not considered as covered work
, and are not covered by the GPL/LGPL/APL/EPL/MIT license.
Only the current implementation (that is, PlantUML program) is licensed under GPL, LGPL, ASL, EPL or MIT. On the other hand note that the documentation (examples, notices, ...) published in the PlantUML website is copyrighted. But you can still write your own documentation.
I have a message "file not found" when running the Word Macro with Java 7!
You may have to properly set Environment Variables. To fix go into Windows Environment Variables settings and find these two variables:
, Add to Value:
, Add to Value:
If they do not exist, create new User Variables:
, Add to Value:
, Add to Value:
What does EmptySvgException mean ?
PlantUML is using Graphviz
to generate some diagrams. So PlantUML is launching dot
program and retrieve the information generated by dot
as a SVG flow.
This message means that PlantUML is getting an empty flow from dot
execution, and therefore cannot generate UML diagrams. There may be several reasons why this happens:
- There is an issue with your Graphviz installation. Try a very simple diagram, with only one class for example.
- Your version of Graphviz is too old and is crashing with information provided by PlantUML. Check your version with
- Your diagram is too complex.
- There is a bug in PlantUML and/or in dot.
I have a message complaining about X11 or headless!
If you are running PlantUML on a linux server without graphical capability, you may have some error message:
- Can't connect to X11 window
- X11 connection rejected because of wrong authentication.
Basically, this is because PlantUML needs to have access to some graphical resources (more information here
). You can turn PlantUML to headless mode, using the flag
. For example:
/usr/bin/java -Djava.awt.headless=true -jar /data/PlantUml/plantuml.jar ...
I have an UnsatisfiedLinkError under Mac OS X !
Under Mac OS X, if you have some error message like:
Error java.lang.UnsatisfiedLinkError / liblwawt.dylib /libosxapp.dylib
You need to follow the instructions on http://stackoverflow.com/questions/25914757/osx-yosemite-jvm-shared-library-does-not-contain-the-jni-createjavavm-symbol
- Download and install the package: JavaForOSX.
- Found the file
AptanaStidio3.ini, the file by default located under the directory here:
/Applications/Aptana Studio 3/AptanaStudio3.app/Contents/MacOS
-vm argument to specify the java which will be used to lunch Aptana Studio:
This seems to work only under Java 6, so you may define the following alias to be used in your scripts.
alias java6="export JAVA_HOME=$(/usr/libexec/java_home -v 1.6.0)"
PlantUML scripts are grabbing keyboard/window focus!
Depending on your configuration, you can try the flag
/usr/bin/java -Djava.awt.headless=true -jar /path/to/plantuml.jar ...
I found an issue, but I cannot provide my diagram showing the issue because my diagram contains confidential data
There is a
option the command line that generates a
file instead of regular image file.
generated file looks like the input diagram expect that all words (except PlantUML language keywords) have been replaced by a random set of letters.
You can double check this by running several time the
option (you will get a different text each time). You may also look at the Cypher.java class
used to execute this transformation to be sure that there are no backdoor there to retrieve back your original diagram.
If there is an issue in your original diagram, the same issue is likely to also occur with the cyphered one. Since the cyphered text is really meaningless, you can safely share it with us : there will be no way for us to guess what you are really working on.
But we will be able to reproduce the issue and fix it so that you can have your original (and confidential) diagram working.
I have a question that is not here!
You can use the forum
Someone will try to answer your question there.