Support debug settings to control how to trigger HCR (#275)

Signed-off-by: Jinbo Wang <[email protected]>

Author: testforstephen

com.microsoft.java.debug.core/src/main/java/com/microsoft/java/debug/core/DebugSettings.java

@@ -14,6 +14,7 @@
 import java.util.logging.Logger;
 
 import com.google.gson.JsonSyntaxException;
+import com.google.gson.annotations.SerializedName;
 import com.microsoft.java.debug.core.protocol.JsonUtils;
 
 public final class DebugSettings {
@@ -24,10 +25,10 @@ public final class DebugSettings {
     public boolean showStaticVariables = false;
     public boolean showQualifiedNames = false;
     public boolean showHex = false;
-    public boolean enableHotCodeReplace = false;
     public boolean showLogicalStructure = true;
     public String logLevel;
     public String javaHome;
+    public HotCodeReplace hotCodeReplace = HotCodeReplace.MANUAL;
 
     public static DebugSettings getCurrent() {
         return current;
@@ -50,4 +51,13 @@ public void updateSettings(String jsonSettings) {
     private DebugSettings() {
 
     }
+
+    public static enum HotCodeReplace {
+        @SerializedName("manual")
+        MANUAL,
+        @SerializedName("auto")
+        AUTO,
+        @SerializedName("never")
+        NEVER
+    }
 }

com.microsoft.java.debug.plugin/src/main/java/com/microsoft/java/debug/plugin/internal/JavaHotCodeReplaceProvider.java

@@ -10,7 +10,7 @@
  *     Yevgen Kogan - Bug 403475 - Hot Code Replace drops too much frames in some cases
  *******************************************************************************/
 /*******************************************************************************
- * Copyright (c) 2017 Microsoft Corporation and others.
+ * Copyright (c) 2017-2019 Microsoft Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -259,7 +259,7 @@ private IResource getSourceFile(IJavaProject project, String qualifiedName, Stri
 
     @Override
     public void initialize(IDebugAdapterContext context, Map<String, Object> options) {
-        if (DebugSettings.getCurrent().enableHotCodeReplace) {
+        if (DebugSettings.getCurrent().hotCodeReplace != DebugSettings.HotCodeReplace.NEVER) {
             // Listen to the built file events.
             ResourcesPlugin.getWorkspace().addResourceChangeListener(this, IResourceChangeEvent.POST_BUILD);
         }