This is a demo project to cover the basics of Spray and the Scala Build Tool.
This demo project consists of a root project with three sub-projects. You can take a look at them using the projects sbt command:
[IJ]> projects
[info] In file:/.../sbt-0.13/lesson/sbt-multi-project-example/
[info] * root
[info] simpleServer
[info] sprayCanDemo
[info] util
You can switch to one of the sub-projects like so:
project sprayCanDemo
[info] Set current project to sprayCanDemo (in build file:/.../sbt-0.13/lesson/sbt-multi-project-example/)
[IJ]> projects
[info] In file:/.../sbt-0.13/lesson/sbt-multi-project-example/
[info] root
[info] simpleServer
[info] * sprayCanDemo
[info] util
The projects are defined in the root directory's build.sbt file:
// util sub-project
lazy val util = (project in file("util")).settings(commonSettings)
// A project may depend on code in another project. This is done by adding a dependsOn method call.
// sprayCanDemo sub-project
lazy val sprayCanDemo = (project in file("sprayCanDemo")).settings(commonSettings).dependsOn(util)
// simpleServer sub-project
lazy val simpleServer = (project in file("simpleServer")).settings(commonSettings).dependsOn(util)
// root project is an aggregate of util, sprayCanDemo, and simpleServer. Calling "compile" on root compiles all of them.
lazy val root = (project in file(".")).aggregate(util, sprayCanDemo, simpleServer)
To compile all sub-projects, run a style-check, format the code, and test it, you can run this script:
# This is not a properties file, it just has the .properties extension for syntax highlighting.
# This is actually an sbt script. It executes the following commands:
eval { println("Begin Script!") }
scalastyle
eval { println("Style Check Done!") }
compile
eval { println("Compile Done!") }
scalafmt
eval { println("Code Formatting Done!") }
test:scalafmt
eval { println("Test Formatting Done!") }
sbt:scalafmt
eval { println("sbt file Formatting Done!") }
scalafmt::test
test:scalafmt::test
sbt:scalafmt::test
eval { println("Done checking that everything is formatted correctly!") }
test
eval { println("Testing Done!") }
assembly
eval { println("Everything has been packaged into a launchable fat jar in the target/ folder!") }
# helloWorldTask was defined in build.sbt
helloWorldTask
eval { println("helloWorldTask Done!") }
# You can run this script via the sbt shell command: < style_check_compile_test_and_package.properties
# For details, see: https://www.scala-sbt.org/0.13/docs/Command-Line-Reference.html
Like so:
project root
[info] Set current project to sbt-multi-project-example (in build file:/Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/)
< style_check_compile_test_and_package.properties
Begin Script!
[info] ans: Unit = null
[info] scalastyle using config /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/scalastyle-config.xml
[info] scalastyle using config /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/scalastyle-config.xml
[info] scalastyle using config /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/scalastyle-config.xml
[info] scalastyle using config /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/scalastyle-config.xml
[info] scalastyle Processed 0 file(s)
[info] scalastyle Found 0 errors
[info] scalastyle Found 0 warnings
[info] scalastyle Found 0 infos
[info] scalastyle Finished in 24 ms
[success] created output: /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/target
[info] scalastyle Processed 2 file(s)
[info] scalastyle Found 0 errors
[info] scalastyle Found 0 warnings
[info] scalastyle Found 0 infos
[info] scalastyle Finished in 3 ms
[success] created output: /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/sprayCanDemo/target
[info] scalastyle Processed 2 file(s)
[info] scalastyle Found 0 errors
[info] scalastyle Found 0 warnings
[info] scalastyle Found 0 infos
[info] scalastyle Finished in 0 ms
[success] created output: /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/util/target
[info] scalastyle Processed 4 file(s)
[info] scalastyle Found 0 errors
[info] scalastyle Found 0 warnings
[info] scalastyle Found 0 infos
[info] scalastyle Finished in 3 ms
[success] created output: /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/simpleServer/target
[success] Total time: 1 s, completed Nov 11, 2018 5:01:59 PM
Style Check Done!
[info] ans: Unit = null
[success] Total time: 5 s, completed Nov 11, 2018 5:02:03 PM
Compile Done!
[info] ans: Unit = null
[success] Total time: 1 s, completed Nov 11, 2018 5:02:04 PM
Code Formatting Done!
[info] ans: Unit = null
[success] Total time: 1 s, completed Nov 11, 2018 5:02:05 PM
Test Formatting Done!
[info] ans: Unit = null
[success] Total time: 1 s, completed Nov 11, 2018 5:02:06 PM
sbt file Formatting Done!
[info] ans: Unit = null
[info] Checking formatting for 4 Scala sources in simpleServer:compile ...
[info] Checking formatting for 2 Scala sources in util:compile ...
[info] Checking formatting for 2 Scala sources in sprayCanDemo:compile ...
[success] Total time: 6 s, completed Nov 11, 2018 5:02:12 PM
[info] Checking formatting for 1 Scala source in sprayCanDemo:test ...
[success] Total time: 1 s, completed Nov 11, 2018 5:02:13 PM
[info] Checking formatting for 1 Scala source in util:sbt ...
[info] Checking formatting for 1 Scala source in root:sbt ...
[info] Checking formatting for 1 Scala source in simpleServer:sbt ...
[info] Checking formatting for 1 Scala source in sprayCanDemo:sbt ...
[success] Total time: 2 s, completed Nov 11, 2018 5:02:16 PM
Done checking that everything is formatted correctly!
[info] ans: Unit = null
[DEBUG] [11/11/2018 17:02:18.630] [pool-150-thread-1] [EventStream(akka://com-example-MyServiceSpec)] logger log1-Logging$DefaultLogger started
[DEBUG] [11/11/2018 17:02:18.633] [pool-150-thread-1] [EventStream(akka://com-example-MyServiceSpec)] Default Loggers started
[DEBUG] [11/11/2018 17:02:19.408] [com-example-MyServiceSpec-akka.actor.default-dispatcher-4] [EventStream] shutting down: StandardOutLogger started
[info] MyServiceSpec
[info]
[info] MyService should
[info] + return a greeting for GET requests to the root path
[info] + leave GET requests to other paths unhandled
[info] + return a MethodNotAllowed error for PUT requests to the root path
[info]
[info] Total for specification MyServiceSpec
[info] Finished in 336 ms
[info] 3 examples, 0 failure, 0 error
[info] Passed: Total 3, Failed 0, Errors 0, Passed 3
[success] Total time: 3 s, completed Nov 11, 2018 5:02:19 PM
Testing Done!
[info] ans: Unit = null
[info] Strategy 'discard' was applied to 7 files (Run the task at debug level to see details)
[info] Strategy 'concat' was applied to a file (Run the task at debug level to see details)
[info] Strategy 'discard' was applied to 10 files (Run the task at debug level to see details)
[info] Strategy 'discard' was applied to a file (Run the task at debug level to see details)
[info] Assembly up to date: /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/util/target/scala-2.11/util-assembly-1.0.0.jar
[info] Assembly up to date: /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/target/scala-2.11/sbt-multi-project-example-1.0.0
[info] Assembly up to date: /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/simpleServer/target/scala-2.11/simpleServer.jar
[DEBUG] [11/11/2018 17:02:25.749] [pool-152-thread-7] [EventStream(akka://com-example-MyServiceSpec)] logger log1-Logging$DefaultLogger started
[DEBUG] [11/11/2018 17:02:25.755] [pool-152-thread-7] [EventStream(akka://com-example-MyServiceSpec)] Default Loggers started
[DEBUG] [11/11/2018 17:02:26.757] [com-example-MyServiceSpec-akka.actor.default-dispatcher-4] [EventStream] shutting down: StandardOutLogger started
[info] MyServiceSpec
[info]
[info] MyService should
[info] + return a greeting for GET requests to the root path
[info] + leave GET requests to other paths unhandled
[info] + return a MethodNotAllowed error for PUT requests to the root path
[info]
[info] Total for specification MyServiceSpec
[info] Finished in 326 ms
[info] 3 examples, 0 failure, 0 error
[info] Passed: Total 3, Failed 0, Errors 0, Passed 3
[info] Strategy 'concat' was applied to a file (Run the task at debug level to see details)
[info] Strategy 'discard' was applied to 10 files (Run the task at debug level to see details)
[info] Assembly up to date: /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/sprayCanDemo/target/scala-2.11/sprayCanDemo.jar
[success] Total time: 8 s, completed Nov 11, 2018 5:02:27 PM
Everything has been packaged into a launchable fat jar in the target/ folder!
[info] ans: Unit = null
[info] Build logger prints: Hello
[info] World!
[success] Total time: 0 s, completed Nov 11, 2018 5:02:28 PM
helloWorldTask Done!
[info] ans: Unit = null
The above sbt script is located in style_check_compile_test_and_package.properties.
Note that when you run the script in the root project, sbt-assembly tries to create one big fat jar.
This doesn't make much sense because each sub-project (with the exception of util) has its own main and we want one jar per sub-project, not one jar for everything.
Let's make an executable jar for just the sprayCanDemo sub-project:
projects
[info] In file:/Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/
[info] * root
[info] simpleServer
[info] sprayCanDemo
[info] util
[IJ]> project sprayCanDemo
[info] Set current project to sprayCanDemo (in build file:/Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/)
[IJ]> assembly
[DEBUG] [11/11/2018 16:33:28.413] [pool-200-thread-4] [EventStream(akka://com-example-MyServiceSpec)] logger log1-Logging$DefaultLogger started
[DEBUG] [11/11/2018 16:33:28.415] [pool-200-thread-4] [EventStream(akka://com-example-MyServiceSpec)] Default Loggers started
[DEBUG] [11/11/2018 16:33:29.203] [com-example-MyServiceSpec-akka.actor.default-dispatcher-3] [EventStream] shutting down: StandardOutLogger started
[info] MyServiceSpec
[info]
[info] MyService should
[info] + return a greeting for GET requests to the root path
[info] + leave GET requests to other paths unhandled
[info] + return a MethodNotAllowed error for PUT requests to the root path
[info]
[info] Total for specification MyServiceSpec
[info] Finished in 342 ms
[info] 3 examples, 0 failure, 0 error
[info] Passed: Total 3, Failed 0, Errors 0, Passed 3
[info] Strategy 'concat' was applied to a file (Run the task at debug level to see details)
[info] Strategy 'discard' was applied to 10 files (Run the task at debug level to see details)
[info] Assembly up to date: /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/sprayCanDemo/target/scala-2.11/sprayCanDemo.jar
[success] Total time: 6 s, completed Nov 11, 2018 4:33:31 PM
Now let's run the jar from the (Linux/Cygwin/Mac) terminal.
Go into the directory where the jar is:
cd /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/sprayCanDemo/target/scala-2.11/
And run it:
java -jar sprayCanDemo.jar
And this is what you get:
MyComputer username$ cd /Users/username/Downloads/NewDownloads/sbt-0.13/lesson/sbt-multi-project-example/sprayCanDemo/target/scala-2.11/
MyComputer username$ java -version
java version "1.8.0_181"
Java(TM) SE Runtime Environment (build 1.8.0_181-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)
MyComputer username$ java -jar sprayCanDemo.jar
[DEBUG] [11/11/2018 16:39:17.272] [main] [EventStream(akka://on-spray-can)] logger log1-Logging$DefaultLogger started
[DEBUG] [11/11/2018 16:39:17.273] [main] [EventStream(akka://on-spray-can)] Default Loggers started
16:39:17.755 [main] INFO - result: List(scala.concurrent.impl.CallbackRunnable@5d7148e2) - com.example.Boot(Boot.scala:27)
16:39:17.758 [main] ERROR - This is a test log!!! - com.example.Boot(Boot.scala:28)
[DEBUG] [11/11/2018 16:39:18.633] [on-spray-can-akka.actor.default-dispatcher-2] [akka://on-spray-can/user/IO-HTTP/listener-0] Binding to localhost/127.0.0.1:8080
[DEBUG] [11/11/2018 16:39:18.744] [on-spray-can-akka.actor.default-dispatcher-4] [akka://on-spray-can/system/IO-TCP/selectors/$a/0] Successfully bound to /127.0.0.1:8080
[INFO] [11/11/2018 16:39:18.747] [on-spray-can-akka.actor.default-dispatcher-2] [akka://on-spray-can/user/IO-HTTP/listener-0] Bound to localhost/127.0.0.1:8080
[DEBUG] [11/11/2018 16:39:31.968] [on-spray-can-akka.actor.default-dispatcher-2] [akka://on-spray-can/system/IO-TCP/selectors/$a/0] New connection accepted
[DEBUG] [11/11/2018 16:39:32.134] [on-spray-can-akka.actor.default-dispatcher-4] [akka://on-spray-can/user/IO-HTTP/listener-0/0] Dispatching GET request to http://127.0.0.1:8080/ to handler Actor[akka://on-spray-can/system/IO-TCP/selectors/$a/1#1874233303]
Navigate to: http://127.0.0.1:8080/
You should see this:
Say hello to spray-routing on spray-can!
Cool, you can package the code as a stand-alone jar that you can run with a simple "java -jar" command.
Note that you will have to change a parameter in the build.sbt file if you want to run it in a Windows environment - it defaults to Linux/Cygwin/Mac.
Now let's talk about sbt Tasks and Settings.
The script runs a task, helloWorldTask, that we defined in the build.sbt file:
// Note: A Setting just contains a value, a Task executes something and then returns a value
val helloSetting = settingKey[String]("A setting that contains the String \"Hello\"")
// I'm going to put it in GlobalScope so that sub-projects can access this
helloSetting in Scope.GlobalScope := "Hello"
val helloTask = taskKey[Unit]("A task that prints the String \"Hello\" obtained from the setting key helloSetting")
helloTask in Scope.GlobalScope := {
// helloTask depends on helloSetting
val hello: String = helloSetting.value
// The special task streams provides per-task logging and I/O via a Streams instance.
// Documentation: https://www.scala-sbt.org/0.13/docs/Howto-Logging.html
val log = streams.value.log
// ---- helloTask begins here ----
log.info(s"Build logger prints: $hello")
}
val helloWorldTask = taskKey[Unit]("A task that executes a dependent task, helloTask, and then prints World")
helloWorldTask in Scope.GlobalScope := {
// helloWorldTask depends on helloTask
val helloResult: Unit = helloTask.value // helloTask happens-before helloWorldTask
val log = streams.value.log // streams task happens-before helloWorldTask
// ---- helloWorldTask begins here ----
log.info(s"World!")
}
If you have ever used ant or rake, sbt tasks are kind of like that.
Note that sbt tasks can import and use library code just like your regular source code can.
You can inspect each of these definitions from the sbt shell like so:
[IJ]> inspect helloSetting
[info] Setting: java.lang.String = Hello
[info] Description:
[info] A setting that contains the String "Hello"
[info] Provided by:
[info] */*:helloSetting
[info] Defined at:
[info] /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/spray-template/build.sbt:77
[info] Delegates:
[info] simpleServer/*:helloSetting
[info] {.}/*:helloSetting
[info] */*:helloSetting
[info] Related:
[info] */*:helloSetting
[IJ]>
[IJ]> inspect helloTask
[info] Task: Unit
[info] Description:
[info] A task that prints the String "Hello" obtained from the setting key helloSetting
[info] Provided by:
[info] */*:helloTask
[info] Defined at:
[info] /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/spray-template/build.sbt:81
[info] Delegates:
[info] simpleServer/*:helloTask
[info] {.}/*:helloTask
[info] */*:helloTask
[info] Related:
[info] */*:helloTask
[IJ]>
[IJ]> inspect helloWorldTask
[info] Task: Unit
[info] Description:
[info] A task that executes a dependent task, helloTask, and then prints World
[info] Provided by:
[info] */*:helloWorldTask
[info] Defined at:
[info] /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/spray-template/build.sbt:94
[info] Delegates:
[info] simpleServer/*:helloWorldTask
[info] {.}/*:helloWorldTask
[info] */*:helloWorldTask
[info] Related:
[info] */*:helloWorldTask
And you can execute them like so:
[IJ]> helloSetting
[info] Hello
[IJ]>
[IJ]> helloTask
[info] Build logger prints: Hello
[success] Total time: 0 s, completed Nov 5, 2018 12:54:25 AM
[IJ]>
[IJ]> helloWorldTask
[info] Build logger prints: Hello
[info] World!
[success] Total time: 0 s, completed Nov 5, 2018 12:54:29 AM
Now, the three sub-projects are util, sprayCanDemo, and simpleServer:
-
utilprovides a custom logging trait that can be used bysprayCanDemoandsimpleServer. -
sprayCanDemoandsimpleServerdepend onutil.
To run the tests in sprayCanDemo:
[IJ]> project sprayCanDemo
[info] Set current project to sprayCanDemo (in build file:/Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/spray-template/)
[IJ]> test
[info] Compiling 1 Scala source to /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/spray-template/sprayCanDemo/target/scala-2.11/test-classes...
[DEBUG] [11/05/2018 00:16:18.230] [pool-41-thread-3] [EventStream(akka://com-example-MyServiceSpec)] logger log1-Logging$DefaultLogger started
[DEBUG] [11/05/2018 00:16:18.232] [pool-41-thread-3] [EventStream(akka://com-example-MyServiceSpec)] Default Loggers started
[DEBUG] [11/05/2018 00:16:19.473] [com-example-MyServiceSpec-akka.actor.default-dispatcher-4] [EventStream] shutting down: StandardOutLogger started
[info] MyServiceSpec
[info]
[info] MyService should
[info] + return a greeting for GET requests to the root path
[info] + leave GET requests to other paths unhandled
[info] + return a MethodNotAllowed error for PUT requests to the root path
[info]
[info] Total for specification MyServiceSpec
[info] Finished in 444 ms
[info] 3 examples, 0 failure, 0 error
[info] Passed: Total 3, Failed 0, Errors 0, Passed 3
[success] Total time: 16 s, completed Nov 5, 2018 12:16:21 AM
To run sprayCanDemo as a background process using the sbt-revolver plugin:
[IJ]> project sprayCanDemo
[info] Set current project to sprayCanDemo (in build file:/Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/spray-template/)
[IJ]> re-start
[info] Application sprayCanDemo not yet started
[info] Starting application sprayCanDemo in the background ...
sprayCanDemo Starting com.example.Boot.main()
[success] Total time: 0 s, completed Nov 5, 2018 12:25:41 AM
[IJ]> sprayCanDemo [DEBUG] [11/05/2018 00:25:42.831] [main] [EventStream(akka://on-spray-can)] logger log1-Logging$DefaultLogger started
sprayCanDemo [DEBUG] [11/05/2018 00:25:42.832] [main] [EventStream(akka://on-spray-can)] Default Loggers started
sprayCanDemo 00:25:43.460 [main] INFO - result: List(scala.concurrent.impl.CallbackRunnable@ca263c2) - com.example.Boot(Boot.scala:27)
sprayCanDemo 00:25:43.473 [main] ERROR - This is a test log! - com.example.Boot(Boot.scala:28)
sprayCanDemo [DEBUG] [11/05/2018 00:25:43.970] [on-spray-can-akka.actor.default-dispatcher-4] [akka://on-spray-can/user/IO-HTTP/listener-0] Binding to localhost/127.0.0.1:8080
sprayCanDemo [DEBUG] [11/05/2018 00:25:44.025] [on-spray-can-akka.actor.default-dispatcher-2] [akka://on-spray-can/system/IO-TCP/selectors/$a/0] Successfully bound to /127.0.0.1:8080
sprayCanDemo [INFO] [11/05/2018 00:25:44.028] [on-spray-can-akka.actor.default-dispatcher-4] [akka://on-spray-can/user/IO-HTTP/listener-0] Bound to localhost/127.0.0.1:8080
sprayCanDemo [DEBUG] [11/05/2018 00:26:03.549] [on-spray-can-akka.actor.default-dispatcher-4] [akka://on-spray-can/system/IO-TCP/selectors/$a/0] New connection accepted
sprayCanDemo [DEBUG] [11/05/2018 00:26:03.631] [on-spray-can-akka.actor.default-dispatcher-4] [akka://on-spray-can/user/IO-HTTP/listener-0/0] Dispatching GET request to http://127.0.0.1:8080/ to handler Actor[akka://on-spray-can/system/IO-TCP/selectors/$a/1#990745101]
re-stop
[info] Stopping application sprayCanDemo (by killing the forked JVM) ...
sprayCanDemo ... finished with exit code 143
[success] Total time: 0 s, completed Nov 5, 2018 12:26:12 AM
Navigate to 127.0.0.1:8080 in your web browser. You should see something like this:
Say hello to spray-routing on spray-can!
Note that the sbt-revolver plugin can be used along with the auto-reload feature to make it so that the code auto-reloads
every time you edit a file.
[IJ]> ~ re-start
[info] Application sprayCanDemo not yet started
[info] Starting application sprayCanDemo in the background ...
sprayCanDemo Starting com.example.Boot.main()
[success] Total time: 0 s, completed Nov 5, 2018 12:28:01 AM
1. Waiting for source changes... (press enter to interrupt)
sprayCanDemo [DEBUG] [11/05/2018 00:28:02.866] [main] [EventStream(akka://on-spray-can)] logger log1-Logging$DefaultLogger started
sprayCanDemo [DEBUG] [11/05/2018 00:28:02.867] [main] [EventStream(akka://on-spray-can)] Default Loggers started
sprayCanDemo 00:28:03.445 [main] INFO - result: List(scala.concurrent.impl.CallbackRunnable@ca263c2) - com.example.Boot(Boot.scala:27)
sprayCanDemo 00:28:03.447 [main] ERROR - This is a test log! - com.example.Boot(Boot.scala:28)
sprayCanDemo [DEBUG] [11/05/2018 00:28:03.968] [on-spray-can-akka.actor.default-dispatcher-4] [akka://on-spray-can/user/IO-HTTP/listener-0] Binding to localhost/127.0.0.1:8080
sprayCanDemo [DEBUG] [11/05/2018 00:28:04.029] [on-spray-can-akka.actor.default-dispatcher-2] [akka://on-spray-can/system/IO-TCP/selectors/$a/0] Successfully bound to /127.0.0.1:8080
sprayCanDemo [INFO] [11/05/2018 00:28:04.033] [on-spray-can-akka.actor.default-dispatcher-4] [akka://on-spray-can/user/IO-HTTP/listener-0] Bound to localhost/127.0.0.1:8080
[info] Compiling 1 Scala source to /Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/spray-template/sprayCanDemo/target/scala-2.11/classes...
[info] Stopping application sprayCanDemo (by killing the forked JVM) ...
sprayCanDemo ... finished with exit code 143
[info] Starting application sprayCanDemo in the background ...
sprayCanDemo Starting com.example.Boot.main()
[success] Total time: 2 s, completed Nov 5, 2018 12:28:30 AM
2. Waiting for source changes... (press enter to interrupt)
The simpleServer sub-project does not have any tests, but you can run it via the re-start command as well:
[IJ]> project simpleServer
[info] Set current project to simpleServer (in build file:/Users/john-michaelreed/Downloads/NewDownloads/sbt-0.13/lesson/spray-template/)
[IJ]> re-start
[info] Application simpleServer not yet started
[info] Starting application simpleServer in the background ...
simpleServer Starting spray.examples.Main.main()
[success] Total time: 0 s, completed Nov 5, 2018 12:31:53 AM
[IJ]> simpleServer [DEBUG] [11/05/2018 00:31:54.088] [main] [EventStream(akka://default)] logger log1-Logging$DefaultLogger started
simpleServer [DEBUG] [11/05/2018 00:31:54.090] [main] [EventStream(akka://default)] Default Loggers started
simpleServer [DEBUG] [11/05/2018 00:31:55.001] [default-akka.actor.default-dispatcher-2] [akka://default/user/IO-HTTP/listener-0] Binding to localhost/127.0.0.1:8080
simpleServer [DEBUG] [11/05/2018 00:31:55.059] [default-akka.actor.default-dispatcher-4] [akka://default/system/IO-TCP/selectors/$a/0] Successfully bound to /127.0.0.1:8080
simpleServer [INFO] [11/05/2018 00:31:55.062] [default-akka.actor.default-dispatcher-4] [akka://default/user/IO-HTTP/listener-0] Bound to localhost/127.0.0.1:8080
simpleServer [INFO] [11/05/2018 00:31:55.065] [default-akka.actor.default-dispatcher-3] [akka://default/deadLetters] Message [akka.io.Tcp$Bound] from Actor[akka://default/user/IO-HTTP/listener-0#1396292109] to Actor[akka://default/deadLetters] was not delivered. [1] dead letters encountered. This logging can be turned off or adjusted with configuration settings 'akka.log-dead-letters' and 'akka.log-dead-letters-during-shutdown'.
re-stop
[info] Stopping application simpleServer (by killing the forked JVM) ...
simpleServer ... finished with exit code 143
[success] Total time: 1 s, completed Nov 5, 2018 12:32:13 AM
Navigate to 127.0.0.1:8080 in your web browser. You should see something like this:
Say hello to spray-can!
Defined resources:
/ping
/stream
/server-stats
/crash
/timeout
/timeout/timeout
/stop
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Remember to do re-stop or else the background application will not terminate.
Note that simpleServer actually has more functionality than sprayCanDemo. For example, to change simpleServer from http to https, all you have to do is go into the simpleServer sub-project's resources/application.conf file and change this value:
spray.can.server {
# uncomment the next line for making this an HTTPS example
# ssl-encryption = on // uses spray/examples/MySslConfiguration.scala
// Note: When I configure Spray to HTTPS, it cant accept HTTP requests, only HTTPS requests.
You can run Git commands from the IntelliJ sbt shell because the sbt-git plugin is in the project/plugins.sbt file:
// Documentation: https://johnreedlol.github.io/sbt-git/
addSbtPlugin("com.typesafe.sbt" % "sbt-git" % "1.0.0")