§Starting your application in production mode
There are several ways to deploy a Play application in production mode. Let’s start by using the simplest way, using a local Play installation.
§Using the start command
The easiest way to start an application in production mode is to use the
start command from the Play console. This requires a Play 2.0 installation on the server.
[My first application] $ start
Note that the
runcommand is only for development mode and should never be used to run an application in production. For each request a complete check is handled by sbt.
When you run the
start command, Play forks a new JVM and runs the default Netty HTTP server. The standard output stream is redirected to the Play console, so you can monitor its status.
The server’s process id is displayed at bootstrap and written to the
RUNNING_PIDfile. To kill a running Play server, it is enough to send a
SIGTERMto the process to properly shutdown the application.
If you type
Ctrl+D, the Play console will quit, but the created server process will continue running in background. The forked JVM’s standard output stream is then closed, and logging can be read from the
If you type
Ctrl+C, you will kill both JVMs: the Play console and the forked Play server.
Alternatively you can directly use
play start at your OS command prompt, which does the same thing:
$ play start
Note: the HTTP port can be set by passing -Dhttp.port system variable
§Using the stage task
The problem with the
start command is that it starts the application interactively, which means that human interaction is needed, and
Ctrl+D is required to detach the process. This solution is not really convenient for automated deployment.
You can use the
stage task to prepare your application to be run in place. The typical command for preparing a project to be run in place is:
$ play clean compile stage
This cleans and compiles your application, retrieves the required dependencies and copies them to the
target/staged directory. It also creates a
target/start script that runs the Play server.
You can start your application using:
start script is very simple - in fact, you could even execute the
java command directly.
If you don’t have Play installed on the server, you can use sbt to do the same thing:
$ sbt clean compile stage
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