[starter][remDev] Subscribe to client launch only after backend is st…

…arted

If we invoke getDriverDeferred and subscribe to IdeLaunchEvent before backend is started, we actually subscribe to the backend and start waiting for the client. Since backend and client both starts dev server it can easily take more than 3 minutes.

GitOrigin-RevId: e466bec1ae9a4961a9922bfc7e980e4afcc8ab7b

intellij.tools.ide.starter.driver/src/com/intellij/ide/starter/driver/driver/remoteDev/RemDevDriverRunner.kt

@@ -30,26 +30,28 @@ class RemDevDriverRunner : DriverRunner {
     val ideBackendHandler = IDEBackendHandler(context, remoteDevDriverOptions)
     val ideFrontendHandler = IDEFrontendHandler(backendContext = context, remoteDevDriverOptions)
 
-    val driver = DriverWithDetailedLogging(RemDevDriver(JmxHost(address = "127.0.0.1:${remoteDevDriverOptions.driverPort}")))
-    val driverDeferred = getDriverDeferred(ideFrontendHandler, driver)
-
+    EventsBus.subscribe("waiting backend start") { event: IdeLaunchEvent ->
+      ideFrontendHandler.handleBackendContext(event.runContext)
+    }
     val backendRun = ideBackendHandler.run(commands, runTimeout, useStartupScript, launchName, expectedKill, expectedExitCode, collectNativeThreads, configure)
+
+    val driver = DriverWithDetailedLogging(RemDevDriver(JmxHost(address = "127.0.0.1:${remoteDevDriverOptions.driverPort}")))
+    val driverDeferred = getDriverDeferred(driver)
     val frontendRun = ideFrontendHandler.runInBackground(launchName)
 
     return runBlocking { RemoteDevBackgroundRun(frontendRun, backendRun.startResult, backendRun.driver, driverDeferred.await(), backendRun.process) }
   }
 
-  private fun getDriverDeferred(ideFrontendHandler: IDEFrontendHandler, driver: DriverWithDetailedLogging): CompletableDeferred<Driver> {
+  private fun getDriverDeferred(driver: DriverWithDetailedLogging): CompletableDeferred<Driver> {
     val driverDeferred = CompletableDeferred<Driver>()
-    EventsBus.subscribe(driverDeferred) { event: IdeLaunchEvent ->
+    EventsBus.subscribe("waiting client start") { event: IdeLaunchEvent ->
       if (driverDeferred.isCompleted) return@subscribe
       withTimeoutOrNull(3.minutes) {
-        ideFrontendHandler.handleBackendContext(event.runContext)
         while (!driver.isConnected) {
           delay(3.seconds)
         }
         driverDeferred.complete(driver)
-      } ?: driverDeferred.completeExceptionally(TimeoutException("Driver couldn't connect"))
+      } ?: driverDeferred.completeExceptionally(TimeoutException("Driver couldn't connect to frontend"))
     }
     return driverDeferred
   }