Let’s assume you have an existing app using Play! 2.1.A and a 2.1.B version was released. You want to update your environment to use that new release. Note: This tutorial was tested to be working with 2.1.* versions; A and B are two arbitrary numbers.
play runwill start the local (Netty) server and your app will be available at localhost:9000.
play ~runwill start the local server and reload it automatically every time you change a file of you app, that way you don’t need to hit refresh (F5) on your browser.
- Useful tip: If you don’t want to have to worry about applying evolutions each time you restart Play, add
applyEvolutions.your_database_name=trueto your application.conf file. For instance, considering the default database, you should add
Debugging using Eclipse
- First you must start the Play! app in debug mode by executing the command
play debug run.
- On Eclipse add your breakpoints as you would normally do.
- Then go to
Run > Debug Configurations...and double-click
Remote Java Application. This will add a new configuration.
Connection propertiesand change
Debugso that it later appears below the Debug icon. Click
That’s it! Check this video for a live explanation.
Follow the official install instructions (these steps will only work for 2.1.* versions of the Play Framework). Afterwards:
play new myFirstAppcreates a new app, in the current directory, inside a new folder called
- Now try to run it. First go inside that folder (
cd myFirstApp), and run it (
- [Optional step] You can transform your Play application into an Eclipse project, by running
play eclipse. If you want Play’s source files and javadoc to be attached to the Eclipse project, you should execute
play "eclipse with-source=true"instead.
The Play Framework is probably one of the few web frameworks that installs and works pretty well on Windows. I started web development with Django, but I had to learn Python and Django at the same time, and the documentation was not so good as they said it was. So I decided to leverage my Java experience and use Play. And since Play supports both Java and Scala I could refactor and move to Scala at any time.
On this guide I’ll just refer to these variables and not their absolute paths:
%JAVA_HOME%, where Java installer installs JDK, e.g.
C:\Program Files (x86)\Java\jdk1.7.0_25\bin
%PLAY_HOME%, where you extract the Play! Framework files, e.g.
To install Play just follow these steps:
Facebook became like coffee – at first you don’t like it and after you drink it you get a sour taste on your mouth. Nonetheless everyone uses it to socialize so you get caught in the addiction.
I had two ideas but I took them nowhere. I’m thankful that someone else had those same ideas. What matters to me is that being copied is the sincerest form of validation. My self-esteem appreciates to know that those were good ideas.
It’s not where you take things from – it’s where you take them to.
I had two ideas but I took them nowhere. I’m thankful that someone else had those same ideas.