Fix: force pipeline stages to reset on deactivate

This change causes a manual pipeline deactivation to
force all pipeline stages to reset, releasing any resources
they hold. It also performs a full reset on the speech context,
releasing it from any external management registered during
the activation.

src/main/java/io/spokestack/spokestack/SpeechPipeline.java

@@ -130,7 +130,14 @@ public void activate() {
 
     /** manually deactivate the speech pipeline. */
     public void deactivate() {
-        this.context.setActive(false);
+        this.context.reset();
+        for (SpeechProcessor stage : this.stages) {
+            try {
+                stage.reset();
+            } catch (Exception e) {
+                raiseError(e);
+            }
+        }
     }
 
     /**

src/test/java/io/spokestack/spokestack/SpeechPipelineTest.java

@@ -212,13 +212,20 @@ public void testContextManagement() throws Exception {
 
         // still no event, and the external activation isn't overridden by the
         // stage, which would normally deactivate on the second frame
-        pipeline.getContext().setActive(true);
+        pipeline.activate();
         transact(true);
         assertTrue(this.events.isEmpty());
         assertTrue(pipeline.getContext().isActive());
 
-        // turn off external management and get the expected activations/events
-        pipeline.getContext().setManaged(false);
+        // ensure that manual deactivation resets stages
+        assertFalse(Stage.reset);
+        pipeline.deactivate();
+        assertTrue(Stage.reset);
+        assertFalse(pipeline.getContext().isActive());
+        assertFalse(pipeline.getContext().isManaged());
+
+        // now that external management is off,
+        // we get the expected activations/events
         transact(false);
         assertEquals(SpeechContext.Event.ACTIVATE, this.events.get(0));
         assertTrue(pipeline.getContext().isActive());
@@ -291,12 +298,14 @@ public void read(SpeechContext context, ByteBuffer frame)
 
     public static class Stage implements SpeechProcessor {
         public static boolean open;
+        public static boolean reset = false;
 
         public Stage(SpeechConfig config) {
             open = true;
         }
 
         public void reset() {
+            reset = true;
             close();
         }