Fix JRuby interpreter shutdown issue

The new version of JRuby fixes this issue. Also amended unit test to
check for shutdown and immediate recreation of JRuby interpreter.

Issue-ID: POLICY-1276
Change-Id: I723e0396985d3163b483e52fdaceb4b4fab7274b
Signed-off-by: liamfallon <liam.fallon@est.tech>

4 files changed, 55 insertions, 26 deletions

diff --git a/plugins/plugins-executor/plugins-executor-jruby/src/main/java/org/onap/policy/apex/plugins/executor/jruby/JrubyStateFinalizerExecutor.java b/plugins/plugins-executor/plugins-executor-jruby/src/main/java/org/onap/policy/apex/plugins/executor/jruby/JrubyStateFinalizerExecutor.java
index d6e9f4d07..28e61b6da 100644
--- a/plugins/plugins-executor/plugins-executor-jruby/src/main/java/org/onap/policy/apex/plugins/executor/jruby/JrubyStateFinalizerExecutor.java
+++ b/plugins/plugins-executor/plugins-executor-jruby/src/main/java/org/onap/policy/apex/plugins/executor/jruby/JrubyStateFinalizerExecutor.java
@@ -1,6 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ *  Modifications Copyright (C) 2019 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,8 +45,8 @@ public class JrubyStateFinalizerExecutor extends StateFinalizerExecutor {
     private static final XLogger LOGGER = XLoggerFactory.getXLogger(JrubyStateFinalizerExecutor.class);
 
     // Jruby container
-    private ScriptingContainer container =
-            new ScriptingContainer(LocalContextScope.CONCURRENT, LocalVariableBehavior.TRANSIENT, true);
+    private ScriptingContainer container = new ScriptingContainer(LocalContextScope.CONCURRENT,
+                    LocalVariableBehavior.TRANSIENT, true);
     private EmbedEvalUnit parsedjruby = null;
 
     /**
@@ -60,10 +61,11 @@ public class JrubyStateFinalizerExecutor extends StateFinalizerExecutor {
 
         // Set up the JRuby engine
         container = (container == null)
-                ? new ScriptingContainer(LocalContextScope.CONCURRENT, LocalVariableBehavior.TRANSIENT, true)
-                : container;
-        container.setError(System.err);
-        container.setOutput(System.out);
+                        ? new ScriptingContainer(LocalContextScope.CONCURRENT, LocalVariableBehavior.TRANSIENT, true)
+                        : container;
+
+        // Use the container.setError(System.err) and container.setOutput(System.out) method calls to redirect output
+        // and error to standard output and error for debugging
         container.put("executor", getExecutionContext()); // needed for the compile
         parsedjruby = container.parse(getSubject().getLogic());
     }
@@ -80,7 +82,7 @@ public class JrubyStateFinalizerExecutor extends StateFinalizerExecutor {
      */
     @Override
     public String execute(final long executionId, final Properties executionProperties,
-            final Map<String, Object> incomingFields) throws StateMachineException, ContextException {
+                    final Map<String, Object> incomingFields) throws StateMachineException, ContextException {
         // Do execution pre work
         executePre(executionId, executionProperties, incomingFields);
 
@@ -112,7 +114,7 @@ public class JrubyStateFinalizerExecutor extends StateFinalizerExecutor {
     @Override
     public void cleanUp() throws StateMachineException {
         LOGGER.debug("cleanUp:" + getSubject().getKey().getId() + "," + getSubject().getLogicFlavour() + ","
-                + getSubject().getLogic());
+                        + getSubject().getLogic());
         container.terminate();
         container = null;
     }
diff --git a/plugins/plugins-executor/plugins-executor-jruby/src/main/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskExecutor.java b/plugins/plugins-executor/plugins-executor-jruby/src/main/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskExecutor.java
index c805597e9..3944aab50 100644
--- a/plugins/plugins-executor/plugins-executor-jruby/src/main/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskExecutor.java
+++ b/plugins/plugins-executor/plugins-executor-jruby/src/main/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskExecutor.java
@@ -1,6 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ *  Modifications Copyright (C) 2019 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,8 +45,8 @@ public class JrubyTaskExecutor extends TaskExecutor {
     private static final XLogger LOGGER = XLoggerFactory.getXLogger(JrubyTaskExecutor.class);
 
     // Jruby container
-    private ScriptingContainer container =
-            new ScriptingContainer(LocalContextScope.CONCURRENT, LocalVariableBehavior.TRANSIENT, true);
+    private ScriptingContainer container = new ScriptingContainer(LocalContextScope.CONCURRENT,
+                    LocalVariableBehavior.TRANSIENT, true);
     private EmbedEvalUnit parsedjruby = null;
 
     /**
@@ -60,10 +61,11 @@ public class JrubyTaskExecutor extends TaskExecutor {
 
         // Set up the JRuby engine
         container = (container == null)
-                ? new ScriptingContainer(LocalContextScope.CONCURRENT, LocalVariableBehavior.TRANSIENT, true)
-                : container;
-        container.setError(System.err);
-        container.setOutput(System.out);
+                        ? new ScriptingContainer(LocalContextScope.CONCURRENT, LocalVariableBehavior.TRANSIENT, true)
+                        : container;
+
+        // Use the container.setError(System.err) and container.setOutput(System.out) method calls to redirect output
+        // and error to standard output and error for debugging
         container.put("executor", getExecutionContext()); // needed for the compile
         parsedjruby = container.parse(getSubject().getTaskLogic().getLogic());
     }
@@ -80,7 +82,7 @@ public class JrubyTaskExecutor extends TaskExecutor {
      */
     @Override
     public Map<String, Object> execute(final long executionId, final Properties executionProperties,
-            final Map<String, Object> incomingFields) throws StateMachineException, ContextException {
+                    final Map<String, Object> incomingFields) throws StateMachineException, ContextException {
         // Do execution pre work
         executePre(executionId, executionProperties, incomingFields);
 
@@ -112,7 +114,7 @@ public class JrubyTaskExecutor extends TaskExecutor {
     @Override
     public void cleanUp() throws StateMachineException {
         LOGGER.debug("cleanUp:" + getSubject().getKey().getId() + "," + getSubject().getTaskLogic().getLogicFlavour()
-                + "," + getSubject().getTaskLogic().getLogic());
+                        + "," + getSubject().getTaskLogic().getLogic());
         container.terminate();
         container = null;
     }
diff --git a/plugins/plugins-executor/plugins-executor-jruby/src/main/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskSelectExecutor.java b/plugins/plugins-executor/plugins-executor-jruby/src/main/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskSelectExecutor.java
index 274acbed1..2655aa195 100644
--- a/plugins/plugins-executor/plugins-executor-jruby/src/main/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskSelectExecutor.java
+++ b/plugins/plugins-executor/plugins-executor-jruby/src/main/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskSelectExecutor.java
@@ -1,6 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ *  Modifications Copyright (C) 2019 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,8 +48,8 @@ public class JrubyTaskSelectExecutor extends TaskSelectExecutor {
     private static final XLogger LOGGER = XLoggerFactory.getXLogger(JrubyTaskSelectExecutor.class);
 
     // Jruby container
-    private ScriptingContainer container =
-            new ScriptingContainer(LocalContextScope.CONCURRENT, LocalVariableBehavior.TRANSIENT, true);
+    private ScriptingContainer container = new ScriptingContainer(LocalContextScope.CONCURRENT,
+                    LocalVariableBehavior.TRANSIENT, true);
     private EmbedEvalUnit parsedjruby = null;
 
     /**
@@ -63,8 +64,12 @@ public class JrubyTaskSelectExecutor extends TaskSelectExecutor {
 
         // Set up the JRuby engine
         container = (container == null)
-                ? new ScriptingContainer(LocalContextScope.CONCURRENT, LocalVariableBehavior.TRANSIENT, true)
-                : container;
+                        ? new ScriptingContainer(LocalContextScope.CONCURRENT, LocalVariableBehavior.TRANSIENT, true)
+                        : container;
+
+        // Use the container.setError(System.err) and container.setOutput(System.out) method calls to redirect output
+        // and error to standard output and error for debugging
+
         container.put("executor", getExecutionContext()); // needed for compile as a placeholder
         parsedjruby = container.parse(getSubject().getTaskSelectionLogic().getLogic());
     }
@@ -81,7 +86,7 @@ public class JrubyTaskSelectExecutor extends TaskSelectExecutor {
      */
     @Override
     public AxArtifactKey execute(final long executionId, final Properties executionProperties,
-            final EnEvent incomingEvent) throws StateMachineException, ContextException {
+                    final EnEvent incomingEvent) throws StateMachineException, ContextException {
         // Do execution pre work
         executePre(executionId, executionProperties, incomingEvent);
 
@@ -113,8 +118,8 @@ public class JrubyTaskSelectExecutor extends TaskSelectExecutor {
     @Override
     public void cleanUp() throws StateMachineException {
         LOGGER.debug("cleanUp:" + getSubject().getKey().getId() + ","
-                + getSubject().getTaskSelectionLogic().getLogicFlavour() + ","
-                + getSubject().getTaskSelectionLogic().getLogic());
+                        + getSubject().getTaskSelectionLogic().getLogicFlavour() + ","
+                        + getSubject().getTaskSelectionLogic().getLogic());
         container.terminate();
         container = null;
     }
diff --git a/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskExecutorTest.java b/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskExecutorTest.java
index 8b58c38d8..2309c1e29 100644
--- a/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskExecutorTest.java
+++ b/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskExecutorTest.java
@@ -1,6 +1,7 @@
 /*-

  * ============LICENSE_START=======================================================

  *  Copyright (C) 2019 Nordix Foundation.

+ *  Modifications Copyright (C) 2019 Nordix Foundation.

  * ================================================================================

  * Licensed under the Apache License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

@@ -69,8 +70,18 @@ public class JrubyTaskExecutorTest {
 

     @Test

     public void testJrubyTaskExecutor() {

+        // Run test twice to check for incorrect shutdown activity

+        jrubyExecutorTest();

+        jrubyExecutorTest();

+    }

+

+    /**

+     * Test the JRuby executor.

+     */

+    private void jrubyExecutorTest() {

         JrubyTaskExecutor jte = new JrubyTaskExecutor();

         assertNotNull(jte);

+

         try {

             Field fieldContainer = JrubyTaskExecutor.class.getDeclaredField("container");

             fieldContainer.setAccessible(true);

@@ -101,11 +112,11 @@ public class JrubyTaskExecutorTest {
             fail("test should throw an exception here");

         } catch (Exception jteException) {

             assertEquals("execute-post: task logic execution failure on task \"NULL\" in model NULL:0.0.0",

-                    jteException.getMessage());

+                            jteException.getMessage());

         }

 

-        final String jrubyLogic =

-                "if executor.executionId == -1" + "\n return false" + "\n else " + "\n return true" + "\n end";

+        final String jrubyLogic = "if executor.executionId == -1" + "\n return false" + "\n else " + "\n return true"

+                        + "\n end";

         task.getTaskLogic().setLogic(jrubyLogic);

 

         try {

@@ -116,5 +127,14 @@ public class JrubyTaskExecutorTest {
         } catch (Exception jteException) {

             fail("test should not throw an exception here");

         }

+

+        try {

+            jte.prepare();

+            Map<String, Object> returnMap = jte.execute(0, new Properties(), incomingParameters);

+            assertEquals(0, returnMap.size());

+            jte.cleanUp();

+        } catch (Exception jteException) {

+            fail("test should not throw an exception here");

+        }

     }

 }