1 files changed, 53 insertions, 0 deletions
diff --git a/jvm/src/main/scala/xyz/driver/core/database/MdcAsyncExecutor.scala b/jvm/src/main/scala/xyz/driver/core/database/MdcAsyncExecutor.scala
new file mode 100644
index 0000000..5939efb
--- /dev/null
+++ b/jvm/src/main/scala/xyz/driver/core/database/MdcAsyncExecutor.scala
@@ -0,0 +1,53 @@
+/** Code ported from "de.geekonaut" %% "slickmdc"  % "1.0.0"
+  * License: @see https://github.com/AVGP/slickmdc/blob/master/LICENSE
+  * Blog post: @see http://50linesofco.de/post/2016-07-01-slick-and-slf4j-mdc-logging-in-scala.html
+  */
+package xyz.driver.core
+package database
+
+import java.util.concurrent._
+import java.util.concurrent.atomic.AtomicInteger
+
+import scala.concurrent._
+import com.typesafe.scalalogging.StrictLogging
+import slick.util.AsyncExecutor
+
+import logging.MdcExecutionContext
+
+/** Taken from the original Slick AsyncExecutor and simplified
+  * @see https://github.com/slick/slick/blob/3.1/slick/src/main/scala/slick/util/AsyncExecutor.scala
+  */
+object MdcAsyncExecutor extends StrictLogging {
+
+  /** Create an AsyncExecutor with a fixed-size thread pool.
+    *
+    * @param name The name for the thread pool.
+    * @param numThreads The number of threads in the pool.
+    */
+  def apply(name: String, numThreads: Int): AsyncExecutor = {
+    new AsyncExecutor {
+      val tf = new DaemonThreadFactory(name + "-")
+
+      lazy val executionContext = {
+        new MdcExecutionContext(ExecutionContext.fromExecutor(Executors.newFixedThreadPool(numThreads, tf)))
+      }
+
+      def close(): Unit = {}
+    }
+  }
+
+  def default(name: String = "AsyncExecutor.default"): AsyncExecutor = apply(name, 20)
+
+  private class DaemonThreadFactory(namePrefix: String) extends ThreadFactory {
+    private[this] val group =
+      Option(System.getSecurityManager).fold(Thread.currentThread.getThreadGroup)(_.getThreadGroup)
+    private[this] val threadNumber = new AtomicInteger(1)
+
+    def newThread(r: Runnable): Thread = {
+      val t = new Thread(group, r, namePrefix + threadNumber.getAndIncrement, 0)
+      if (!t.isDaemon) t.setDaemon(true)
+      if (t.getPriority != Thread.NORM_PRIORITY) t.setPriority(Thread.NORM_PRIORITY)
+      t
+    }
+  }
+}