Use Rhino javascript executor in apex-pdp

Integation unit tests resultd in StackOverflowException errors in the
Graal Javascript interpreter. Following extensive testing and
trouobleshooting, it proved very difficult to fix these issues in Graal
as the stck overflow errors were occurring in native class instantiation
methods being invoked by Grall on the JVM.

The alternative Rhino Javascript engine is developed by mozilla, and was
incorporated into the Java 6 JVM and evolved into Nashorn in the Java 8
JVM. Oracle dropped Nashorn in Java 11. However, in parallel, Rhino
development has continued.

This review brings in the Rhino javascript engine into apex-pdp as the
replacement for Nashorn and instead of Graal. Graal seems to be pretty
unstable as yet so we may bring it in in future releases but for now
Rhino is a more stable and reliable alternative.

Issue-ID: POLICY-2106
Change-Id: I0edeff3b0bee404b38e3ebe22001a6e3375a44dc
Signed-off-by: liamfallon <liam.fallon@est.tech>

3 files changed, 35 insertions, 34 deletions

diff --git a/plugins/plugins-executor/plugins-executor-javascript/src/test/java/org/onap/policy/apex/plugins/executor/javascript/JavascriptStateFinalizerExecutorTest.java b/plugins/plugins-executor/plugins-executor-javascript/src/test/java/org/onap/policy/apex/plugins/executor/javascript/JavascriptStateFinalizerExecutorTest.java
index 5ccbd255f..8be79558f 100644
--- a/plugins/plugins-executor/plugins-executor-javascript/src/test/java/org/onap/policy/apex/plugins/executor/javascript/JavascriptStateFinalizerExecutorTest.java
+++ b/plugins/plugins-executor/plugins-executor-javascript/src/test/java/org/onap/policy/apex/plugins/executor/javascript/JavascriptStateFinalizerExecutorTest.java
@@ -23,7 +23,6 @@ package org.onap.policy.apex.plugins.executor.javascript;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.fail;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -94,31 +93,32 @@ public class JavascriptStateFinalizerExecutorTest {
         jsfe.setContext(parentStateExcutor, stateFinalizerLogic, internalContext);
 
         stateFinalizerLogic.setLogic("return false");
-        jsfe.prepare();
+        assertThatThrownBy(() -> {
+            jsfe.prepare();
+        }).hasMessage("logic failed to compile for NULL:0.0.0:NULL:NULL "
+                + "with message: invalid return (NULL:0.0.0:NULL:NULL#1)");
 
         Map<String, Object> incomingParameters1 = new HashMap<>();
         assertThatThrownBy(() -> {
             jsfe.execute(-1, new Properties(), incomingParameters1);
-            fail("test should throw an exception here");
-        }).hasMessage("execute: logic failed to run for \"NULL:0.0.0:NULL:NULL\"");
+        }).hasMessage("logic failed to compile for NULL:0.0.0:NULL:NULL "
+                + "with message: invalid return (NULL:0.0.0:NULL:NULL#1)");
 
         stateFinalizerLogic.setLogic("java.lang.String");
         jsfe.prepare();
 
         AxEvent axEvent = new AxEvent(new AxArtifactKey("Event", "0.0.1"));
         EnEvent event = new EnEvent(axEvent);
-        stateFinalizerLogic.setLogic(
-                "if(executor.executionId==-1)" + "{\r\n" + "var returnValueType = Java.type(\"java.lang.Boolean\");"
-                        + "var returnValue = new returnValueType(false); }\n" + "else{\n"
-                        + "executor.setSelectedStateOutputName(\"SelectedOutputIsMe\");\n"
-                        + "var returnValueType = Java.type(\"java.lang.Boolean\");\n" + "\n"
-                        + "var returnValue = new returnValueType(true);}");
+        stateFinalizerLogic.setLogic("if(executor.executionId==-1)" + "{\r\n"
+                + "var returnValueType = java.lang.Boolean;" + "var returnValue = new returnValueType(false); }\n"
+                + "else{\n" + "executor.setSelectedStateOutputName(\"SelectedOutputIsMe\");\n"
+                + "var returnValueType = java.lang.Boolean;\n" + "\n"
+                + "var returnValue = new returnValueType(true);} true;");
 
         assertThatThrownBy(() -> {
             jsfe.prepare();
             jsfe.execute(-1, new Properties(), event);
-        }).hasMessage("execute-post: state finalizer logic execution failure on state \"NULL:0.0.0:NULL:NULL\" "
-                + "on finalizer logic NULL:0.0.0:NULL:NULL");
+        }).hasMessage("execute-post: state finalizer logic \"NULL:0.0.0:NULL:NULL\" did not select an output state");
 
         state.getStateOutputs().put("SelectedOutputIsMe", null);
 
diff --git a/plugins/plugins-executor/plugins-executor-javascript/src/test/java/org/onap/policy/apex/plugins/executor/javascript/JavascriptTaskExecutorTest.java b/plugins/plugins-executor/plugins-executor-javascript/src/test/java/org/onap/policy/apex/plugins/executor/javascript/JavascriptTaskExecutorTest.java
index 786cebcc3..c327ebb4d 100644
--- a/plugins/plugins-executor/plugins-executor-javascript/src/test/java/org/onap/policy/apex/plugins/executor/javascript/JavascriptTaskExecutorTest.java
+++ b/plugins/plugins-executor/plugins-executor-javascript/src/test/java/org/onap/policy/apex/plugins/executor/javascript/JavascriptTaskExecutorTest.java
@@ -105,41 +105,38 @@ public class JavascriptTaskExecutorTest {
             jte.prepare();
         }).isInstanceOf(NullPointerException.class);
 
-        AxTask task = new AxTask();
+        AxTask task = new AxTask(new AxArtifactKey("TestTask:0.0.1"));
         final ApexInternalContext internalContext = new ApexInternalContext(new AxPolicyModel());
 
         jte.setContext(null, task, internalContext);
 
         task.getTaskLogic().setLogic("return boolean;");
-        jte.prepare();
 
-        Map<String, Object> incomingParameters2 = new HashMap<>();
         assertThatThrownBy(() -> {
-            jte.execute(-1, new Properties(), incomingParameters2);
-        }).hasMessage("execute: logic failed to run for \"NULL:0.0.0\"");
+            jte.prepare();
+            jte.execute(-1, new Properties(), null);
+        }).hasMessage("logic failed to compile for TestTask:0.0.1 with message: invalid return (TestTask:0.0.1#1)");
 
         task.getTaskLogic().setLogic("var x = 5;");
-        jte.prepare();
 
+        jte.prepare();
         assertThatThrownBy(() -> {
             jte.execute(-1, new Properties(), null);
         }).isInstanceOf(NullPointerException.class);
+        jte.cleanUp();
 
-        Map<String, Object> incomingParameters = new HashMap<>();
-        assertThatThrownBy(() -> {
-            jte.execute(-1, new Properties(), incomingParameters);
-        }).hasMessage("execute: logic failed to set a return value for \"NULL:0.0.0\"");
+        task.getTaskLogic().setLogic("var returnValue = false;\nreturnValue;");
 
-        task.getTaskLogic().setLogic("var returnValueType = Java.type(\"java.lang.Boolean\");\n"
-                + "var returnValue = new returnValueType(false); ");
+        Map<String, Object> incomingParameters = new HashMap<>();
 
         assertThatThrownBy(() -> {
             jte.prepare();
             jte.execute(-1, new Properties(), incomingParameters);
-        }).hasMessage("execute-post: task logic execution failure on task \"NULL\" in model NULL:0.0.0");
+        }).hasMessage("execute-post: task logic execution failure on task \"TestTask\" in model NULL:0.0.0");
 
-        task.getTaskLogic().setLogic("var returnValueType = Java.type(\"java.lang.Boolean\");\r\n"
-                + "var returnValue = new returnValueType(true); ");
+        jte.cleanUp();
+
+        task.getTaskLogic().setLogic("var returnValue = true;\nreturnValue;");
 
         jte.prepare();
         Map<String, Object> returnMap = jte.execute(0, new Properties(), incomingParameters);
@@ -176,11 +173,13 @@ public class JavascriptTaskExecutorTest {
 
         jte.prepare();
         jte.execute(-1, new Properties(), incomingParameters);
+        jte.cleanUp();
 
         task.getTaskLogic().setLogic(TextFileUtils.getTextFileAsString("src/test/resources/javascript/TestLogic01.js"));
         jte.prepare();
 
         Map<String, Object> outcomingParameters = jte.execute(-1, new Properties(), incomingParameters);
+        jte.cleanUp();
 
         assertEquals("returnVal0", outcomingParameters.get("par0"));
         assertEquals("returnVal1", outcomingParameters.get("par1"));
diff --git a/plugins/plugins-executor/plugins-executor-javascript/src/test/java/org/onap/policy/apex/plugins/executor/javascript/JavascriptTaskSelectExecutorTest.java b/plugins/plugins-executor/plugins-executor-javascript/src/test/java/org/onap/policy/apex/plugins/executor/javascript/JavascriptTaskSelectExecutorTest.java
index abbcd19b7..3acf132dd 100644
--- a/plugins/plugins-executor/plugins-executor-javascript/src/test/java/org/onap/policy/apex/plugins/executor/javascript/JavascriptTaskSelectExecutorTest.java
+++ b/plugins/plugins-executor/plugins-executor-javascript/src/test/java/org/onap/policy/apex/plugins/executor/javascript/JavascriptTaskSelectExecutorTest.java
@@ -80,14 +80,17 @@ public class JavascriptTaskSelectExecutorTest {
         AxState state = new AxState();
         ApexInternalContext internalContext = new ApexInternalContext(new AxPolicyModel());
         jtse.setContext(null, state, internalContext);
-        jtse.prepare();
+
+        assertThatThrownBy(() -> {
+            jtse.prepare();
+        }).hasMessage("no logic specified for NULL:0.0.0:NULL:NULL");
 
         AxEvent axEvent1 = new AxEvent(new AxArtifactKey("Event", "0.0.1"));
         EnEvent event1 = new EnEvent(axEvent1);
 
         assertThatThrownBy(() -> {
             jtse.execute(-1, new Properties(), event1);
-        }).hasMessage("execute: logic failed to set a return value for \"NULL:0.0.0:NULL:NULL\"");
+        }).hasMessage("no logic specified for NULL:0.0.0:NULL:NULL");
 
         state.getTaskSelectionLogic().setLogic("java.lang.String");
         jtse.prepare();
@@ -101,18 +104,17 @@ public class JavascriptTaskSelectExecutorTest {
 
         assertThatThrownBy(() -> {
             jtse.execute(-1, new Properties(), event);
-        }).hasMessage("execute: logic failed to set a return value for \"NULL:0.0.0:NULL:NULL\"");
+        }).hasMessage(
+                "execute: logic for NULL:0.0.0:NULL:NULL returned a non-boolean value [JavaClass java.lang.String]");
 
-        state.getTaskSelectionLogic().setLogic("var returnValueType = Java.type(\"java.lang.Boolean\");\r\n"
-                + "var returnValue = new returnValueType(false); ");
+        state.getTaskSelectionLogic().setLogic("var x=1;\n" + "false; ");
 
         assertThatThrownBy(() -> {
             jtse.prepare();
             jtse.execute(-1, new Properties(), event);
         }).hasMessage("execute-post: task selection logic failed on state \"NULL:0.0.0:NULL:NULL\"");
 
-        state.getTaskSelectionLogic().setLogic("var returnValueType = Java.type(\"java.lang.Boolean\");\r\n"
-                + "var returnValue = new returnValueType(true); ");
+        state.getTaskSelectionLogic().setLogic("var x = 1\n" + "true; ");
 
         jtse.prepare();
         AxArtifactKey taskKey = jtse.execute(0, new Properties(), event);