initial sketch of cake stuff

5 files changed, 76 insertions, 0 deletions

diff --git a/src/main/scala/cake.scala b/src/main/scala/cake.scala
new file mode 100644
index 0000000..51bdcb8
--- /dev/null
+++ b/src/main/scala/cake.scala
@@ -0,0 +1,24 @@
+package cake
+
+trait HasLogger extends cake.services.HasLogger {
+  type LoggerType = Logger
+  class Logger(logFileName: String) extends cake.logger.FileLogger(logFileName)
+}
+
+trait HasDatabase extends cake.services.HasDatabase {
+  type DatabaseType = Database
+  class Database(dsn: String, username: String, password: String) extends cake.database.DBI(dsn, username, password)
+}
+
+trait HasApplication extends cake.services.HasApplication {
+  this: cake.HasLogger with cake.HasDatabase =>
+  type ApplicationType = Application
+  class Application extends cake.application.Application(logger, database)
+}
+
+object Container extends HasApplication with HasLogger with HasDatabase {
+  val logger      = new Logger("out.log")
+  // val database    = Database.connect("dbi:mysql:myapp", "doy", "blah")
+  val database    = new Database("dbi:mysql:myapp", "doy", "blah")
+  val application = new Application
+}
diff --git a/src/main/scala/cake/application.scala b/src/main/scala/cake/application.scala
new file mode 100644
index 0000000..8311dc8
--- /dev/null
+++ b/src/main/scala/cake/application.scala
@@ -0,0 +1,13 @@
+package cake.application
+
+import cake.logger.FileLogger
+import cake.database.DBI
+
+class Application (val logger: FileLogger, val dbh: DBI) {
+  def run (): Unit = {
+    logger.log("starting")
+    logger.log("got a dbh: " +
+      List(dbh.dsn, dbh.username, dbh.password).mkString(", "))
+    logger.log("ending")
+  }
+}
diff --git a/src/main/scala/cake/database.scala b/src/main/scala/cake/database.scala
new file mode 100644
index 0000000..d7f37e9
--- /dev/null
+++ b/src/main/scala/cake/database.scala
@@ -0,0 +1,13 @@
+package cake.database
+
+// class DBI private (
+class DBI (
+  val dsn:      String,
+  val username: String,
+  val password: String) {
+}
+
+// object DBI {
+//   def connect (dsn: String, username: String, password: String) =
+//     new DBI(dsn, username, password)
+// }
diff --git a/src/main/scala/cake/logger.scala b/src/main/scala/cake/logger.scala
new file mode 100644
index 0000000..6c4a64d
--- /dev/null
+++ b/src/main/scala/cake/logger.scala
@@ -0,0 +1,10 @@
+package cake.logger
+
+trait Logger {
+  def log (msg: String): Unit
+}
+
+class FileLogger (val logFileName: String) extends Logger {
+  def log (msg: String): Unit =
+    println("writing " + msg + " to " + logFileName)
+}
diff --git a/src/main/scala/cake/services.scala b/src/main/scala/cake/services.scala
new file mode 100644
index 0000000..ed28203
--- /dev/null
+++ b/src/main/scala/cake/services.scala
@@ -0,0 +1,16 @@
+package cake.services
+
+trait HasApplication {
+  type ApplicationType
+  val application: ApplicationType
+}
+
+trait HasDatabase {
+  type DatabaseType
+  val database: DatabaseType
+}
+
+trait HasLogger {
+  type LoggerType
+  val logger: LoggerType
+}