fix(chat/inline workspace context): fix updating workspace index blocks UI thread (aws#5297)

Wrap ProjectContextProvider@updateIndex inside pluginAwareExecuteOnPooledThread to make it execute it in background context instead of EDT

aws#5296

Author: Will-ShaoHua

.changes/next-release/bugfix-970b5a61-5646-4f40-b9fa-65c69ceda73f.json

@@ -0,0 +1,4 @@
+{
+  "type" : "bugfix",
+  "description" : "Fix UI freeze caused by updating workspace index on non background context"
+}

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

@@ -13,12 +13,14 @@ import com.intellij.openapi.vfs.newvfs.BulkFileListener
 import com.intellij.openapi.vfs.newvfs.events.VFileCreateEvent
 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.Job
 import kotlinx.coroutines.TimeoutCancellationException
 import kotlinx.coroutines.launch
 import software.aws.toolkits.core.utils.getLogger
 import software.aws.toolkits.core.utils.warn
+import software.aws.toolkits.jetbrains.utils.pluginAwareExecuteOnPooledThread
 import java.util.concurrent.TimeoutException
 
 @Service(Service.Level.PROJECT)
@@ -38,8 +40,10 @@ class ProjectContextController(private val project: Project, private val cs: Cor
                     val createdFiles = events.filterIsInstance<VFileCreateEvent>().mapNotNull { it.file?.path }
                     val deletedFiles = events.filterIsInstance<VFileDeleteEvent>().map { it.file.path }
 
-                    updateIndex(createdFiles, IndexUpdateMode.ADD)
-                    updateIndex(deletedFiles, IndexUpdateMode.REMOVE)
+                    pluginAwareExecuteOnPooledThread {
+                        updateIndex(createdFiles, IndexUpdateMode.ADD)
+                        updateIndex(deletedFiles, IndexUpdateMode.REMOVE)
+                    }
                 }
             }
         )
@@ -68,6 +72,7 @@ class ProjectContextController(private val project: Project, private val cs: Cor
             emptyList()
         }
 
+    @RequiresBackgroundThread
     fun updateIndex(filePaths: List<String>, mode: IndexUpdateMode) {
         try {
             return projectContextProvider.updateIndex(filePaths, mode)

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

@@ -6,6 +6,7 @@ package software.aws.toolkits.jetbrains.services.amazonq.project
 import com.intellij.openapi.fileEditor.FileDocumentManager
 import com.intellij.openapi.fileEditor.FileEditorManagerEvent
 import com.intellij.openapi.fileEditor.FileEditorManagerListener
+import software.aws.toolkits.jetbrains.utils.pluginAwareExecuteOnPooledThread
 
 class ProjectContextEditorListener : FileEditorManagerListener {
     override fun selectionChanged(event: FileEditorManagerEvent) {
@@ -19,6 +20,8 @@ class ProjectContextEditorListener : FileEditorManagerListener {
         }
 
         val project = event.manager.project
-        ProjectContextController.getInstance(project).updateIndex(listOf(oldFile.path), IndexUpdateMode.UPDATE)
+        pluginAwareExecuteOnPooledThread {
+            ProjectContextController.getInstance(project).updateIndex(listOf(oldFile.path), IndexUpdateMode.UPDATE)
+        }
     }
 }