better error handling and log messages

src/main/kotlin/net/eksb/obsdc/DBus.kt

@@ -3,6 +3,7 @@ package net.eksb.obsdc
 import org.freedesktop.dbus.annotations.DBusInterfaceName
 import org.freedesktop.dbus.connections.impl.DBusConnection
 import org.freedesktop.dbus.connections.impl.DBusConnectionBuilder
+import org.freedesktop.dbus.exceptions.DBusException
 import org.freedesktop.dbus.interfaces.DBusInterface
 import org.freedesktop.dbus.interfaces.DBusSigHandler
 import org.freedesktop.dbus.messages.DBusSignal
@@ -27,7 +28,11 @@ class DBus(private val opRunner:OpRunner): AutoCloseable {
 
 	init {
 		// These lines are not necessary to handle signals, but are necessary to register methods.
-			dbus.requestBusName("net.eksb.obsdc")
+		try {
+			dbus.requestBusName(BUS_NAME)
+		} catch (e:DBusException) {
+			error("Error requesting bus. Already running?")
+		}
 		dbus.exportObject("/", ObsdcDBusInterfaceImpl())
 
 		dbus.addSigHandler<ObsdcDBusInterface.Signal> { signal ->
@@ -36,14 +41,19 @@ class DBus(private val opRunner:OpRunner): AutoCloseable {
 			log.debug("op: ${op}")
 			opRunner.run(op)
 		}
+		log.debug("DBUS initialized")
 	}
 
 	override fun close() {
+		dbus.releaseBusName(BUS_NAME)
 		dbus.close()
 	}
 
+	companion object {
+		private const val BUS_NAME = "net.eksb.obsdc"
 		private val log = LoggerFactory.getLogger(DBus::class.java)
 	}
+}
 
 inline fun <reified T: DBusSignal> DBusConnection.addSigHandler(handler: DBusSigHandler<T>) {
 	addSigHandler(T::class.java, handler)

src/main/kotlin/net/eksb/obsdc/Main.kt

@@ -1,8 +1,11 @@
 package net.eksb.obsdc
 
+import org.slf4j.LoggerFactory
+
 object Main {
     @JvmStatic
     fun main(args: Array<String>) {
+        try {
             val config = CONFIG_FILE.properties()
             Obs(
                 host = config.getProperty("host") ?: "localhost",
@@ -14,5 +17,10 @@ object Main {
                     waitForShutdown()
                 }
             }
+        } catch (e:Exception) {
+            log.error(e.message, e)
         }
     }
+
+    private val log = LoggerFactory.getLogger(Main::class.java)
+}

src/main/kotlin/net/eksb/obsdc/Obs.kt

@@ -48,7 +48,7 @@ class Obs(
 		.host(host)
 		.port(port)
 		.password(password)
-		.autoConnect(true)
+		.autoConnect(false)
 		.connectionTimeout(connectionTimeout)
 		.lifecycle()
 			.onReady(::onReady)
@@ -67,7 +67,11 @@ class Obs(
 		// OBSRemoteController starts a non-daemon thread. It probably should not do that.
 		// Kill it on shutdown.
 		addShutdownHook {
-			controller.stop()
+			close()
+		}
+		// connect() blocks until OBS is up, so fork it.
+		thread(name="obs-init-connect", isDaemon=true, start=true) {
+			controller.connect()
 		}
 	}
 
@@ -112,24 +116,26 @@ class Obs(
 	/**
 	 * Thread that runs submitted requests from [q] when [ready].
 	 */
-	private val opThread = thread(name="obs-op", isDaemon=true, start=true) {
+	private val opThread = thread(name="obs-op", isDaemon=false, start=true) {
 		while(!closed.get()) {
-			val req = q.take()
+			val req = try {
+				q.take()
+			} catch (e:InterruptedException) {
+				log.debug("interrupted taking req")
+				continue
+			}
 			log.debug("got req: ${req}, wait for ready")
+			try {
 				ready.enter {
 					log.debug("ready")
 					if (!req.expired()) {
-					try {
 							req.block.invoke(controller)
-					} catch (e:InterruptedException) {
-						log.debug("interrupted")
-						throw e
+					}
+				}
 			} catch (e:Exception) {
 				log.error("req ${req} failed", e )
 			}
 		}
-			}
-		}
 		log.debug("done")
 	}
 
@@ -147,7 +153,6 @@ class Obs(
 	}
 
 	override fun close() {
-		log.debug("close")
 		closed.set(true)
 		opThread.interrupt()
 		controller.disconnect()