Trait-based initialization and other utilities

Adds the concept of a 'platform', a centralized place in which
environment-specific information will be managed, and provides common
initialization logic for most "standard" apps.

As part of the common initialization, other parts of core have also
been reworked:

- HTTP-related unmarshallers and path matchers have been factored out
  from core.json to a new core.rest.directives package (core.json
  extends those unmarshallers and matchers for backwards
  compatibility)

- CORS handling has also been moved to a dedicated utility trait

- Some custom headers have been moved from raw headers to typed ones
  in core.rest.headers

- The concept of a "reporter" has been introduced. A reporter is a
  context-aware combination of tracing and logging. It is intended to
  issue diagnostic messages that can be traced across service
  boundaries.

Closes #192
Closes #195

1 files changed, 31 insertions, 0 deletions

diff --git a/src/main/scala/xyz/driver/core/reporting/ScalaLoggerLike.scala b/src/main/scala/xyz/driver/core/reporting/ScalaLoggerLike.scala
new file mode 100644
index 0000000..c1131fb
--- /dev/null
+++ b/src/main/scala/xyz/driver/core/reporting/ScalaLoggerLike.scala
@@ -0,0 +1,31 @@
+package xyz.driver.core.reporting
+import com.typesafe.scalalogging.Logger
+
+trait ScalaLoggerLike extends Reporter {
+
+  def logger: Logger
+
+  override def debug(message: String)(implicit ctx: SpanContext): Unit = logger.debug(message)
+  override def info(message: String)(implicit ctx: SpanContext): Unit  = logger.info(message)
+  override def warn(message: String)(implicit ctx: SpanContext): Unit  = logger.warn(message)
+  override def error(message: String)(implicit ctx: SpanContext): Unit = logger.error(message)
+  override def error(message: String, reason: Throwable)(implicit ctx: SpanContext): Unit =
+    logger.error(message, reason)
+
+}
+
+object ScalaLoggerLike {
+  import scala.language.implicitConversions
+
+  def defaultScalaLogger(json: Boolean = false): Logger = {
+    if (json) {
+      System.setProperty("logback.configurationFile", "deployed-logback.xml")
+    } else {
+      System.setProperty("logback.configurationFile", "logback.xml")
+    }
+    Logger.apply("application")
+  }
+
+  implicit def toScalaLogger(reporter: ScalaLoggerLike): Logger = reporter.logger
+
+}