fix(amazonq): use Dispatchers.IO for @workspace requests

Default dispatcher is limited on threads. Network requests should be under Dispatchers.IO

Author: rli

.changes/next-release/bugfix-e06391bd-f5ae-4c2a-a102-580d30f3be8d.json

@@ -0,0 +1,4 @@
+{
+  "type" : "bugfix",
+  "description" : "Amazon Q: Attempt to reduce thread pool contention caused by `@workspace` makinng large number of requests"
+}

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/project/ProjectContextController.kt

@@ -15,6 +15,7 @@ import com.intellij.openapi.vfs.newvfs.events.VFileDeleteEvent
 import com.intellij.openapi.vfs.newvfs.events.VFileEvent
 import com.intellij.util.concurrency.annotations.RequiresBackgroundThread
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
 import kotlinx.coroutines.TimeoutCancellationException
 import kotlinx.coroutines.launch
@@ -28,7 +29,7 @@ class ProjectContextController(private val project: Project, private val cs: Cor
     // TODO: Ideally we should inject dependencies via constructor for easier testing, refer to how [TelemetryService] inject publisher and batcher
     private val encoderServer: EncoderServer = EncoderServer(project)
     private val projectContextProvider: ProjectContextProvider = ProjectContextProvider(project, encoderServer, cs)
-    val initJob: Job = cs.launch {
+    val initJob: Job = cs.launch(Dispatchers.IO) {
         encoderServer.downloadArtifactsAndStartServer()
     }
 

plugins/amazonq/shared/jetbrains-community/src/software/aws/toolkits/jetbrains/services/amazonq/project/ProjectContextProvider.kt

@@ -16,6 +16,7 @@ import com.intellij.openapi.vfs.VirtualFile
 import com.intellij.openapi.vfs.VirtualFileVisitor
 import com.intellij.openapi.vfs.isFile
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.async
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
@@ -44,7 +45,7 @@ class ProjectContextProvider(val project: Project, private val encoderServer: En
     private val mapper = jacksonObjectMapper()
 
     init {
-        cs.launch {
+        cs.launch(Dispatchers.IO) {
             if (ApplicationManager.getApplication().isUnitTestMode) {
                 return@launch
             }