Launch separate threads for Javascript task execution

When a policy is loaded, a separate thread is spawned for each
Javascript script executor. This allows us to precompile the Javascript
scripts and also to have a larger stack available for script execution.

Issue-ID: POLICY-2106
Change-Id: I97323aafb623ba537ac1889b3c9504b345b4f67e
Signed-off-by: liamfallon <liam.fallon@est.tech>

4 files changed, 135 insertions, 37 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 8be79558f..d4a346187 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
@@ -20,6 +20,7 @@
 
 package org.onap.policy.apex.plugins.executor.javascript;
 
+import static org.assertj.core.api.Assertions.assertThatCode;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
@@ -96,36 +97,59 @@ public class JavascriptStateFinalizerExecutorTest {
         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)");
+            + "with message: invalid return (NULL:0.0.0:NULL:NULL#1)");
 
         Map<String, Object> incomingParameters1 = new HashMap<>();
         assertThatThrownBy(() -> {
             jsfe.execute(-1, new Properties(), incomingParameters1);
-        }).hasMessage("logic failed to compile for NULL:0.0.0:NULL:NULL "
-                + "with message: invalid return (NULL:0.0.0:NULL:NULL#1)");
+        }).hasMessage("execution failed, executor NULL:0.0.0:NULL:NULL is not running");
+
+        assertThatThrownBy(() -> {
+            jsfe.prepare();
+        }).hasMessage("initiation failed, executor NULL:0.0.0:NULL:NULL failed to start");
 
+        assertThatThrownBy(() -> {
+            jsfe.cleanUp();
+        }).hasMessage("cleanup failed, executor NULL:0.0.0:NULL:NULL is not running");
+
+        JavascriptStateFinalizerExecutor jsfe1 = new JavascriptStateFinalizerExecutor();
         stateFinalizerLogic.setLogic("java.lang.String");
-        jsfe.prepare();
+        jsfe1.setContext(parentStateExcutor, stateFinalizerLogic, internalContext);
+        jsfe1.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.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 \"NULL:0.0.0:NULL:NULL\" did not select an output state");
+            jsfe1.execute(-1, new Properties(), event);
+        }).hasMessage(
+            "execute: logic for NULL:0.0.0:NULL:NULL returned a non-boolean value [JavaClass java.lang.String]");
+
+        assertThatThrownBy(() -> {
+            jsfe1.execute(-1, new Properties(), event);
+        }).hasMessage(
+            "execute: logic for NULL:0.0.0:NULL:NULL returned a non-boolean value [JavaClass java.lang.String]");
+
+        assertThatCode(() -> {
+            jsfe1.cleanUp();
+        }).doesNotThrowAnyException();
+
+        JavascriptStateFinalizerExecutor jsfe2 = new JavascriptStateFinalizerExecutor();
+
+        stateFinalizerLogic.setLogic("executor.setSelectedStateOutputName(\"SelectedOutputIsMe\");\n true;");
+
+        jsfe2.setContext(parentStateExcutor, stateFinalizerLogic, internalContext);
+        assertThatCode(() -> {
+            jsfe2.prepare();
+        }).doesNotThrowAnyException();
 
         state.getStateOutputs().put("SelectedOutputIsMe", null);
 
-        jsfe.prepare();
-        String stateOutput = jsfe.execute(0, new Properties(), event);
+        String stateOutput = jsfe2.execute(0, new Properties(), event);
         assertEquals("SelectedOutputIsMe", stateOutput);
 
-        jsfe.cleanUp();
+        assertThatCode(() -> {
+            jsfe2.cleanUp();
+        }).doesNotThrowAnyException();
     }
 }
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 c327ebb4d..b532d6c47 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
@@ -20,6 +20,7 @@
 
 package org.onap.policy.apex.plugins.executor.javascript;
 
+import static org.assertj.core.api.Assertions.assertThatCode;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
@@ -64,7 +65,7 @@ public class JavascriptTaskExecutorTest {
     public static void prepareForTest() {
         final ContextParameters contextParameters = new ContextParameters();
         contextParameters.getLockManagerParameters()
-                .setPluginClass("org.onap.policy.apex.context.impl.locking.jvmlocal.JvmLocalLockManager");
+            .setPluginClass("org.onap.policy.apex.context.impl.locking.jvmlocal.JvmLocalLockManager");
 
         contextParameters.setName(ContextParameterConstants.MAIN_GROUP_NAME);
         contextParameters.getDistributorParameters().setName(ContextParameterConstants.DISTRIBUTOR_GROUP_NAME);
@@ -98,32 +99,47 @@ public class JavascriptTaskExecutorTest {
 
     @Test
     public void testJavascriptTaskExecutor() throws Exception {
-        JavascriptTaskExecutor jte = new JavascriptTaskExecutor();
-        assertNotNull(jte);
-
         assertThatThrownBy(() -> {
-            jte.prepare();
+            JavascriptTaskExecutor jteBadPrep = new JavascriptTaskExecutor();
+            jteBadPrep.prepare();
         }).isInstanceOf(NullPointerException.class);
 
         AxTask task = new AxTask(new AxArtifactKey("TestTask:0.0.1"));
         final ApexInternalContext internalContext = new ApexInternalContext(new AxPolicyModel());
 
-        jte.setContext(null, task, internalContext);
+        JavascriptTaskExecutor jteBadLogic = new JavascriptTaskExecutor();
+        assertNotNull(jteBadLogic);
+
+        jteBadLogic.setContext(null, task, internalContext);
 
         task.getTaskLogic().setLogic("return boolean;");
 
         assertThatThrownBy(() -> {
-            jte.prepare();
-            jte.execute(-1, new Properties(), null);
+            jteBadLogic.prepare();
         }).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;");
 
+        JavascriptTaskExecutor jte = new JavascriptTaskExecutor();
+        jte.setContext(null, task, internalContext);
+
         jte.prepare();
+
+        assertThatThrownBy(() -> {
+            jte.prepare();
+        }).hasMessage("initiation failed, executor TestTask:0.0.1 is already running");
+
         assertThatThrownBy(() -> {
             jte.execute(-1, new Properties(), null);
         }).isInstanceOf(NullPointerException.class);
-        jte.cleanUp();
+
+        assertThatThrownBy(() -> {
+            jte.execute(-1, new Properties(), null);
+        }).isInstanceOf(NullPointerException.class);
+
+        assertThatCode(() -> {
+            jte.cleanUp();
+        }).doesNotThrowAnyException();
 
         task.getTaskLogic().setLogic("var returnValue = false;\nreturnValue;");
 
@@ -142,6 +158,10 @@ public class JavascriptTaskExecutorTest {
         Map<String, Object> returnMap = jte.execute(0, new Properties(), incomingParameters);
         assertEquals(0, returnMap.size());
         jte.cleanUp();
+
+        assertThatCode(() -> {
+            jte.cleanUp();
+        }).doesNotThrowAnyException();
     }
 
     @Test
@@ -188,12 +208,12 @@ public class JavascriptTaskExecutorTest {
     private ContextAlbum createTestContextAlbum() throws ContextException {
         AxContextSchemas schemas = new AxContextSchemas();
         AxContextSchema simpleStringSchema =
-                new AxContextSchema(new AxArtifactKey("SimpleStringSchema", "0.0.1"), "JAVA", "java.lang.String");
+            new AxContextSchema(new AxArtifactKey("SimpleStringSchema", "0.0.1"), "JAVA", "java.lang.String");
         schemas.getSchemasMap().put(simpleStringSchema.getKey(), simpleStringSchema);
         ModelService.registerModel(AxContextSchemas.class, schemas);
 
         AxContextAlbum axContextAlbum = new AxContextAlbum(new AxArtifactKey("TestContextAlbum", "0.0.1"), "Policy",
-                true, AxArtifactKey.getNullKey());
+            true, AxArtifactKey.getNullKey());
 
         axContextAlbum.setItemSchema(simpleStringSchema.getKey());
         Distributor distributor = new JvmLocalDistributor();
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 3acf132dd..cb577535a 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
@@ -20,6 +20,7 @@
 
 package org.onap.policy.apex.plugins.executor.javascript;
 
+import static org.assertj.core.api.Assertions.assertThatCode;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
@@ -90,7 +91,7 @@ public class JavascriptTaskSelectExecutorTest {
 
         assertThatThrownBy(() -> {
             jtse.execute(-1, new Properties(), event1);
-        }).hasMessage("no logic specified for NULL:0.0.0:NULL:NULL");
+        }).hasMessage("execution failed, executor NULL:0.0.0:NULL:NULL is not running");
 
         state.getTaskSelectionLogic().setLogic("java.lang.String");
         jtse.prepare();
@@ -105,20 +106,32 @@ public class JavascriptTaskSelectExecutorTest {
         assertThatThrownBy(() -> {
             jtse.execute(-1, new Properties(), event);
         }).hasMessage(
-                "execute: logic for NULL:0.0.0:NULL:NULL returned a non-boolean value [JavaClass java.lang.String]");
+            "execute: logic for NULL:0.0.0:NULL:NULL returned a non-boolean value [JavaClass java.lang.String]");
 
-        state.getTaskSelectionLogic().setLogic("var x=1;\n" + "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 x = 1\n" + "true; ");
+        }).hasMessage(
+            "execute: logic for NULL:0.0.0:NULL:NULL returned a non-boolean value [JavaClass java.lang.String]");
 
-        jtse.prepare();
-        AxArtifactKey taskKey = jtse.execute(0, new Properties(), event);
-        assertEquals("NULL:0.0.0", taskKey.getId());
-        jtse.cleanUp();
+        assertThatThrownBy(() -> {
+            jtse.prepare();
+        }).hasMessage("initiation failed, executor NULL:0.0.0:NULL:NULL is already running");
+
+        assertThatCode(() -> {
+            jtse.cleanUp();
+        }).doesNotThrowAnyException();
+
+        JavascriptTaskSelectExecutor jtse1 = new JavascriptTaskSelectExecutor();
+        jtse1.setContext(null, state, internalContext);
+        state.getTaskSelectionLogic().setLogic("var x = 1\n" + "true;");
+
+        assertThatCode(() -> {
+            jtse1.prepare();
+            AxArtifactKey taskKey = jtse1.execute(0, new Properties(), event);
+            assertEquals("NULL:0.0.0", taskKey.getId());
+            jtse1.cleanUp();
+        }).doesNotThrowAnyException();
     }
 }
diff --git a/plugins/plugins-executor/plugins-executor-javascript/src/test/resources/logback-test.xml b/plugins/plugins-executor/plugins-executor-javascript/src/test/resources/logback-test.xml
new file mode 100644
index 000000000..f3bc0c8ed
--- /dev/null
+++ b/plugins/plugins-executor/plugins-executor-javascript/src/test/resources/logback-test.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ============LICENSE_START=======================================================
+   Copyright (C) 2016-2018 Ericsson. All rights reserved.
+   Modifications Copyright (C) 2020 Nordix Foundation.
+  ================================================================================
+  Licensed under the Apache License, Version 2.0 (the "License");
+  you may not use this file except in compliance with the License.
+  You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+
+  SPDX-License-Identifier: Apache-2.0
+  ============LICENSE_END=========================================================
+-->
+
+<configuration>
+    <contextName>Apex</contextName>
+    <statusListener class="ch.qos.logback.core.status.OnConsoleStatusListener" />
+
+    <!-- USE FOR STD OUT ONLY -->
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <Pattern>%d %contextName [%t] %level %logger{36} - %msg%n</Pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+
+    <logger name="org.onap.policy.apex.plugins.executor.javascript" level="INFO" additivity="false">
+        <appender-ref ref="STDOUT" />
+    </logger>
+</configuration>