* Fix the threads update bug.

* Move the resumeVm and updateThreads methods into the Debuggee interface.

Author: MrRogerHuang

adapter/src/main/kotlin/org/javacs/ktda/adapter/KotlinDebugAdapter.kt

@@ -271,7 +271,8 @@ class KotlinDebugAdapter(
 			exceptionsPool.clear()
 			converter.variablesPool.clear()
 			converter.stackFramePool.removeAllOwnedBy(args.threadId)
-			(debuggee as JDIDebuggee).resumeVm()
+			// See the issue: https://github.com/fwcd/kotlin-debug-adapter/pull/40
+			debuggee?.resumeVm()
 		}
 		ContinueResponse().apply {
 			allThreadsContinued = false
@@ -354,6 +355,7 @@ class KotlinDebugAdapter(
 	override fun source(args: SourceArguments): CompletableFuture<SourceResponse> = notImplementedDAPMethod()
 
 	override fun threads() = async.compute { onceDebuggeeIsPresent { debuggee ->
+		debuggee.updateThreads()
 		ThreadsResponse().apply {
 			threads = debuggee.threads
 				.asSequence()

adapter/src/main/kotlin/org/javacs/ktda/core/Debuggee.kt

@@ -17,7 +17,11 @@ interface Debuggee {
 		get() = null
 
 	fun exit()
-	
+
+	fun resumeVm()
+
+	fun updateThreads()
+
 	fun threadByID(id: Long): DebuggeeThread? = threads
 		.asSequence()
 		.filter { it.id == id }

adapter/src/main/kotlin/org/javacs/ktda/jdi/JDIDebuggee.kt

@@ -54,7 +54,7 @@ class JDIDebuggee(
 		hookBreakpoints()
 	}
 
-	private fun updateThreads() = threads.setAll(vm.allThreads().map { JDIThread(it, this) })
+	override fun updateThreads() = threads.setAll(vm.allThreads().map { JDIThread(it, this) })
 
 	private fun hookBreakpoints() {
 		context.breakpointManager.also { manager ->
@@ -134,7 +134,7 @@ class JDIDebuggee(
 		}
 	}
 
-	fun resumeVm() {
+	override fun resumeVm() {
 		vm.resume()
 	}