refactor(coroutines): remove unnecessary instance creation on class loading for IDEA 242

Previously, the TokenizerImpl instance and the coroutine scope were being created when the corresponding companion objects were accessed. This could potentially lead to unnecessary resource usage. The change ensures that the TokenizerImpl instance and coroutine scope are only initialized when they are actually needed, improving the application's performance and resource management. Specifically:

- TokenizerImpl is now lazily initialized only when requested.
- LLMCoroutineScope's coroutine scope is initialized at the point of instance creation rather than on class loading.
- The AutoDevInputSection now uses a try-catch block to handle the possibility of TokenizerImpl not being available, with appropriate error logging.

Author: phodal

src/main/kotlin/cc/unitmesh/devti/gui/chat/AutoDevInputSection.kt

@@ -64,7 +64,13 @@ class AutoDevInputSection(private val project: Project, val disposable: Disposab
     private val logger = logger<AutoDevInputSection>()
 
     val editorListeners = EventDispatcher.create(AutoDevInputListener::class.java)
-    private var tokenizer: Tokenizer? = null
+    private var tokenizer: Tokenizer? = try {
+        lazy { TokenizerImpl.INSTANCE }.value
+    } catch (e: Exception) {
+        logger.error("TokenizerImpl.INSTANCE is not available", e)
+        null
+    }
+
     var text: String
         get() {
             return input.text
@@ -168,8 +174,6 @@ class AutoDevInputSection(private val project: Project, val disposable: Disposab
                 this@AutoDevInputSection.initEditor()
             }
         })
-
-        tokenizer = TokenizerImpl.INSTANCE
     }
 
     fun showStopButton() {

src/main/kotlin/cc/unitmesh/devti/llms/tokenizer/TokenizerImpl.kt

@@ -23,7 +23,6 @@ class TokenizerImpl : Tokenizer {
     }
 
     companion object {
-        val INSTANCE =
-            ApplicationManager.getApplication().getService(TokenizerImpl::class.java)
+        val INSTANCE = ApplicationManager.getApplication().getService(TokenizerImpl::class.java)
     }
 }

src/main/kotlin/cc/unitmesh/devti/util/LLMCoroutineScope.kt

@@ -9,7 +9,9 @@ import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.SupervisorJob
 
 @Service(Service.Level.PROJECT)
-class LLMCoroutineScope(val coroutineScope: CoroutineScope = CoroutineScope(SupervisorJob() + coroutineExceptionHandler)){
+class LLMCoroutineScope {
+    val coroutineScope: CoroutineScope = CoroutineScope(SupervisorJob() + coroutineExceptionHandler)
+
     companion object {
         val coroutineExceptionHandler = CoroutineExceptionHandler { _, throwable ->
             Logger.getInstance(LLMCoroutineScope::class.java).error(throwable)