Refactor JS Executor.

@@ -321,7 +321,7 @@ public class ActorSystemContext {
                     .put("msgId", tbMsg.getId().toString())
                     .put("msgType", tbMsg.getType())
                     .put("dataType", tbMsg.getDataType().name())
-                    .put("data", convertToString(tbMsg.getDataType(), tbMsg.getData()))
+                    .put("data", tbMsg.getData())
                     .put("metadata", metadata);
 
             if (error != null) {
@@ -335,21 +335,6 @@ public class ActorSystemContext {
         }
     }
 
-    private String convertToString(TbMsgDataType messageType, byte[] data) {
-        if (data == null) {
-            return null;
-        }
-        switch (messageType) {
-            case JSON:
-            case TEXT:
-                return new String(data, StandardCharsets.UTF_8);
-            case BINARY:
-                return Base64Utils.encodeToString(data);
-            default:
-                throw new RuntimeException("Message type: " + messageType + " is not supported!");
-        }
-    }
-
     public static Exception toException(Throwable error) {
         return Exception.class.isInstance(error) ? (Exception) error : new Exception(error);
     }

@@ -149,7 +149,7 @@ public abstract class AbstractRuleEngineFlowIntegrationTest extends AbstractRule
                 "CUSTOM",
                 device.getId(),
                 new TbMsgMetaData(),
-                new byte[]{});
+                "{}");
         actorService.onMsg(new ServiceToRuleEngineMsg(savedTenant.getId(), tbMsg));
 
         Thread.sleep(3000);

@@ -135,7 +135,7 @@ public abstract class AbstractRuleEngineLifecycleIntegrationTest extends Abstrac
                 "CUSTOM",
                 device.getId(),
                 new TbMsgMetaData(),
-                new byte[]{});
+                "{}");
         actorService.onMsg(new ServiceToRuleEngineMsg(savedTenant.getId(), tbMsg));
 
         Thread.sleep(3000);

@@ -39,9 +39,9 @@ public final class TbMsg implements Serializable {
     private final EntityId originator;
     private final TbMsgMetaData metaData;
     private final TbMsgDataType dataType;
-    private final byte[] data;
+    private final String data;
 
-    public TbMsg(UUID id, String type, EntityId originator, TbMsgMetaData metaData, byte[] data) {
+    public TbMsg(UUID id, String type, EntityId originator, TbMsgMetaData metaData, String data) {
         this.id = id;
         this.type = type;
         this.originator = originator;
@@ -64,7 +64,7 @@ public final class TbMsg implements Serializable {
         }
 
         builder.setDataType(msg.getDataType().ordinal());
-        builder.setData(ByteString.copyFrom(msg.getData()));
+        builder.setData(msg.getData());
         byte[] bytes = builder.build().toByteArray();
         return ByteBuffer.wrap(bytes);
     }
@@ -75,16 +75,13 @@ public final class TbMsg implements Serializable {
             TbMsgMetaData metaData = new TbMsgMetaData(proto.getMetaData().getDataMap());
             EntityId entityId = EntityIdFactory.getByTypeAndId(proto.getEntityType(), proto.getEntityId());
             TbMsgDataType dataType = TbMsgDataType.values()[proto.getDataType()];
-            return new TbMsg(UUID.fromString(proto.getId()), proto.getType(), entityId, metaData, dataType, proto.getData().toByteArray());
+            return new TbMsg(UUID.fromString(proto.getId()), proto.getType(), entityId, metaData, dataType, proto.getData());
         } catch (InvalidProtocolBufferException e) {
             throw new IllegalStateException("Could not parse protobuf for TbMsg", e);
         }
     }
 
     public TbMsg copy() {
-        int dataSize = data.length;
-        byte[] dataCopy = new byte[dataSize];
-        System.arraycopy( data, 0, dataCopy, 0, data.length );
-        return new TbMsg(id, type, originator, metaData.copy(), dataType, dataCopy);
+        return new TbMsg(id, type, originator, metaData.copy(), dataType, data);
     }
 }

@@ -33,7 +33,7 @@ public final class TbMsgMetaData implements Serializable {
 
     private Map<String, String> data = new ConcurrentHashMap<>();
 
-    TbMsgMetaData(Map<String, String> data) {
+    public TbMsgMetaData(Map<String, String> data) {
         this.data = data;
     }
 

@@ -32,5 +32,5 @@ message TbMsgProto {
     TbMsgMetaDataProto metaData = 5;
 
     int32 dataType = 6;
-    bytes data = 7;
+    string data = 7;
 }
\ No newline at end of file

@@ -126,7 +126,7 @@ public class QueueBenchmark implements CommandLineRunner {
         TbMsgMetaData metaData = new TbMsgMetaData();
         metaData.putValue("key", "value");
         String dataStr = "someContent";
-        return new TbMsg(UUIDs.timeBased(), "type", null, metaData, TbMsgDataType.JSON, dataStr.getBytes());
+        return new TbMsg(UUIDs.timeBased(), "type", null, metaData, TbMsgDataType.JSON, dataStr);
     }
 
     @Bean

@@ -45,7 +45,7 @@ public class CassandraMsgRepositoryTest extends AbstractServiceTest {
 
     @Test
     public void msgCanBeSavedAndRead() throws ExecutionException, InterruptedException {
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "type", new DeviceId(UUIDs.timeBased()), null, TbMsgDataType.JSON, new byte[4]);
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "type", new DeviceId(UUIDs.timeBased()), null, TbMsgDataType.JSON, "0000");
         UUID nodeId = UUIDs.timeBased();
         ListenableFuture<Void> future = msgRepository.save(msg, nodeId, 1L, 1L, 1L);
         future.get();
@@ -55,7 +55,7 @@ public class CassandraMsgRepositoryTest extends AbstractServiceTest {
 
     @Test
     public void expiredMsgsAreNotReturned() throws ExecutionException, InterruptedException {
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "type", new DeviceId(UUIDs.timeBased()), null, TbMsgDataType.JSON, new byte[4]);
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "type", new DeviceId(UUIDs.timeBased()), null, TbMsgDataType.JSON, "0000");
         UUID nodeId = UUIDs.timeBased();
         ListenableFuture<Void> future = msgRepository.save(msg, nodeId, 2L, 2L, 2L);
         future.get();
@@ -68,7 +68,7 @@ public class CassandraMsgRepositoryTest extends AbstractServiceTest {
         TbMsgMetaData metaData = new TbMsgMetaData();
         metaData.putValue("key", "value");
         String dataStr = "someContent";
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "type", new DeviceId(UUIDs.timeBased()), metaData, TbMsgDataType.JSON, dataStr.getBytes());
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "type", new DeviceId(UUIDs.timeBased()), metaData, TbMsgDataType.JSON, dataStr);
         UUID nodeId = UUIDs.timeBased();
         ListenableFuture<Void> future = msgRepository.save(msg, nodeId, 1L, 1L, 1L);
         future.get();

@@ -16,6 +16,7 @@
 package org.thingsboard.rule.engine.debug;
 
 import com.datastax.driver.core.utils.UUIDs;
+import com.google.common.util.concurrent.ListenableFuture;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.util.StringUtils;
 import org.thingsboard.rule.engine.TbNodeUtils;
@@ -58,9 +59,11 @@ public class TbMsgGeneratorNode implements TbNode {
     public static final String TB_MSG_GENERATOR_NODE_MSG = "TbMsgGeneratorNodeMsg";
 
     private TbMsgGeneratorNodeConfiguration config;
+    private NashornJsEngine jsEngine;
     private long delay;
     private EntityId originatorId;
     private UUID nextTickId;
+    private TbMsg prevMsg;
 
     @Override
     public void init(TbContext ctx, TbNodeConfiguration configuration) throws TbNodeException {
@@ -71,29 +74,41 @@ public class TbMsgGeneratorNode implements TbNode {
         } else {
             originatorId = ctx.getSelfId();
         }
+        this.jsEngine = new NashornJsEngine(config.getJsScript(), "Generate", "prevMsg", "prevMetadata", "prevMsgType");
         sentTickMsg(ctx);
     }
 
     @Override
     public void onMsg(TbContext ctx, TbMsg msg) {
         if (msg.getType().equals(TB_MSG_GENERATOR_NODE_MSG) && msg.getId().equals(nextTickId)) {
-            TbMsgMetaData metaData = new TbMsgMetaData();
-            if (config.getMsgMetaData() != null) {
-                config.getMsgMetaData().forEach(metaData::putValue);
-            }
-            ctx.tellNext(new TbMsg(UUIDs.timeBased(), config.getMsgType(), originatorId, metaData, config.getMsgBody().getBytes(StandardCharsets.UTF_8)));
-            sentTickMsg(ctx);
+            withCallback(generate(ctx),
+                    m -> {ctx.tellNext(m); sentTickMsg(ctx);},
+                    t -> {ctx.tellError(msg, t); sentTickMsg(ctx);});
         }
     }
 
     private void sentTickMsg(TbContext ctx) {
-        TbMsg tickMsg = new TbMsg(UUIDs.timeBased(), TB_MSG_GENERATOR_NODE_MSG, ctx.getSelfId(), new TbMsgMetaData(), new byte[]{});
+        TbMsg tickMsg = new TbMsg(UUIDs.timeBased(), TB_MSG_GENERATOR_NODE_MSG, ctx.getSelfId(), new TbMsgMetaData(), "");
         nextTickId = tickMsg.getId();
         ctx.tellSelf(tickMsg, delay);
     }
 
+    protected ListenableFuture<TbMsg> generate(TbContext ctx) {
+        return ctx.getJsExecutor().executeAsync(() -> {
+            if (prevMsg == null) {
+                prevMsg = new TbMsg(UUIDs.timeBased(), "", originatorId, new TbMsgMetaData(), "{}");
+            }
+            TbMsg generated = jsEngine.executeGenerate(prevMsg);
+            prevMsg = new TbMsg(UUIDs.timeBased(), generated.getType(), originatorId, generated.getMetaData(), generated.getData());
+            return prevMsg;
+        });
+    }
 
     @Override
     public void destroy() {
+        prevMsg = null;
+        if (jsEngine != null) {
+            jsEngine.destroy();
+        }
     }
 }

@@ -28,17 +28,17 @@ public class TbMsgGeneratorNodeConfiguration implements NodeConfiguration<TbMsgG
     private int periodInSeconds;
     private String originatorId;
     private EntityType originatorType;
-    private String msgType;
-    private String msgBody;
-    private Map<String, String> msgMetaData;
+    private String jsScript;
 
     @Override
     public TbMsgGeneratorNodeConfiguration defaultConfiguration() {
         TbMsgGeneratorNodeConfiguration configuration = new TbMsgGeneratorNodeConfiguration();
         configuration.setMsgCount(0);
         configuration.setPeriodInSeconds(1);
-        configuration.setMsgType("DebugMsg");
-        configuration.setMsgBody("{}");
+        configuration.setJsScript("var msg = { temp: 42, humidity: 77 };\n" +
+                "var metadata = { data: 40 };\n" +
+                "var msgType = \"DebugMsg\";\n\n" +
+                "return { msg: msg, metadata: metadata, msgType: msgType };");
         return configuration;
     }
 }

@@ -35,7 +35,8 @@ import static org.thingsboard.rule.engine.DonAsynchron.withCallback;
         nodeDetails = "Evaluate incoming Message with configured JS condition. " +
                 "If <b>True</b> - send Message via <b>True</b> chain, otherwise <b>False</b> chain is used." +
                 "Message payload can be accessed via <code>msg</code> property. For example <code>msg.temperature < 10;</code>" +
-                "Message metadata can be accessed via <code>metadata</code> property. For example <code>metadata.customerName === 'John';</code>",
+                "Message metadata can be accessed via <code>metadata</code> property. For example <code>metadata.customerName === 'John';</code>" +
+                "Message type can be accessed via <code>msgType</code> property.",
         uiResources = {"static/rulenode/rulenode-core-config.js"},
         configDirective = "tbFilterNodeScriptConfig")
 
@@ -53,15 +54,11 @@ public class TbJsFilterNode implements TbNode {
     @Override
     public void onMsg(TbContext ctx, TbMsg msg) {
         ListeningExecutor jsExecutor = ctx.getJsExecutor();
-        withCallback(jsExecutor.executeAsync(() -> jsEngine.executeFilter(toBindings(msg))),
+        withCallback(jsExecutor.executeAsync(() -> jsEngine.executeFilter(msg)),
                 filterResult -> ctx.tellNext(msg, Boolean.toString(filterResult)),
                 t -> ctx.tellError(msg, t));
     }
 
-    private Bindings toBindings(TbMsg msg) {
-        return NashornJsEngine.bindMsg(msg);
-    }
-
     @Override
     public void destroy() {
         if (jsEngine != null) {

@@ -36,7 +36,8 @@ import static org.thingsboard.rule.engine.DonAsynchron.withCallback;
         nodeDetails = "Node executes configured JS script. Script should return array of next Chain names where Message should be routed. " +
                 "If Array is empty - message not routed to next Node. " +
                 "Message payload can be accessed via <code>msg</code> property. For example <code>msg.temperature < 10;</code> " +
-                "Message metadata can be accessed via <code>metadata</code> property. For example <code>metadata.customerName === 'John';</code>",
+                "Message metadata can be accessed via <code>metadata</code> property. For example <code>metadata.customerName === 'John';</code>" +
+                "Message type can be accessed via <code>msgType</code> property.",
         uiResources = {"static/rulenode/rulenode-core-config.js"},
         configDirective = "tbFilterNodeSwitchConfig")
 public class TbJsSwitchNode implements TbNode {
@@ -53,7 +54,7 @@ public class TbJsSwitchNode implements TbNode {
     @Override
     public void onMsg(TbContext ctx, TbMsg msg) {
         ListeningExecutor jsExecutor = ctx.getJsExecutor();
-        withCallback(jsExecutor.executeAsync(() -> jsEngine.executeSwitch(toBindings(msg))),
+        withCallback(jsExecutor.executeAsync(() -> jsEngine.executeSwitch(msg)),
                 result -> processSwitch(ctx, msg, result),
                 t -> ctx.tellError(msg, t));
     }
@@ -62,11 +63,7 @@ public class TbJsSwitchNode implements TbNode {
         ctx.tellNext(msg, nextRelations);
     }
 
-    private Bindings toBindings(TbMsg msg) {
-        return NashornJsEngine.bindMsg(msg);
-    }
-
-    @Override
+   @Override
     public void destroy() {
         if (jsEngine != null) {
             jsEngine.destroy();

@@ -16,6 +16,7 @@
 package org.thingsboard.rule.engine.js;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.common.collect.Sets;
@@ -23,9 +24,13 @@ import jdk.nashorn.api.scripting.NashornScriptEngineFactory;
 import jdk.nashorn.api.scripting.ScriptObjectMirror;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.ArrayUtils;
+import org.apache.commons.lang3.StringUtils;
 import org.thingsboard.server.common.msg.TbMsg;
+import org.thingsboard.server.common.msg.TbMsgMetaData;
 
 import javax.script.*;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.util.Collections;
 import java.util.Map;
 import java.util.Set;
@@ -34,112 +39,158 @@ import java.util.Set;
 @Slf4j
 public class NashornJsEngine {
 
+
+    public static final String MSG = "msg";
     public static final String METADATA = "metadata";
-    public static final String DATA = "msg";
+    public static final String MSG_TYPE = "msgType";
 
-    private static final String JS_WRAPPER_PREFIX_TEMPLATE = "function %s(msg, metadata) { ";
-    private static final String JS_WRAPPER_SUFFIX_TEMPLATE = "}\n %s(msg, metadata);";
+    private static final String JS_WRAPPER_PREFIX_TEMPLATE = "function %s(msgStr, metadataStr, msgType) { " +
+            "    var msg = JSON.parse(msgStr); " +
+            "    var metadata = JSON.parse(metadataStr); " +
+            "    return JSON.stringify(%s(msg, metadata, msgType));" +
+            "    function %s(%s, %s, %s) {";
+    private static final String JS_WRAPPER_SUFFIX = "}" +
+            "\n}";
 
+    private static final ObjectMapper mapper = new ObjectMapper();
     private static NashornScriptEngineFactory factory = new NashornScriptEngineFactory();
-
-    private CompiledScript engine;
-
-    public NashornJsEngine(String script, String functionName) {
-        String jsWrapperPrefix = String.format(JS_WRAPPER_PREFIX_TEMPLATE, functionName);
-        String jsWrapperSuffix = String.format(JS_WRAPPER_SUFFIX_TEMPLATE, functionName);
-        engine = compileScript(jsWrapperPrefix + script + jsWrapperSuffix);
+    private static ScriptEngine engine = factory.getScriptEngine(new String[]{"--no-java"});
+
+    private final String invokeFunctionName;
+
+    public NashornJsEngine(String script, String functionName, String... argNames) {
+        this.invokeFunctionName = "invokeInternal" + this.hashCode();
+        String msgArg;
+        String metadataArg;
+        String msgTypeArg;
+        if (argNames != null && argNames.length == 3) {
+            msgArg = argNames[0];
+            metadataArg = argNames[1];
+            msgTypeArg = argNames[2];
+        } else {
+            msgArg = MSG;
+            metadataArg = METADATA;
+            msgTypeArg = MSG_TYPE;
+        }
+        String jsWrapperPrefix = String.format(JS_WRAPPER_PREFIX_TEMPLATE, this.invokeFunctionName,
+                functionName, functionName, msgArg, metadataArg, msgTypeArg);
+        compileScript(jsWrapperPrefix + script + JS_WRAPPER_SUFFIX);
     }
 
-    private static CompiledScript compileScript(String script) {
-        ScriptEngine engine = factory.getScriptEngine(new String[]{"--no-java"});
-        Compilable compEngine = (Compilable) engine;
+    private static void compileScript(String script) {
         try {
-            return compEngine.compile(script);
+            engine.eval(script);
         } catch (ScriptException e) {
             log.warn("Failed to compile JS script: {}", e.getMessage(), e);
             throw new IllegalArgumentException("Can't compile script: " + e.getMessage());
         }
     }
 
-    public static Bindings bindMsg(TbMsg msg) {
+    private static String[] prepareArgs(TbMsg msg) {
         try {
-            Bindings bindings = new SimpleBindings();
-            if (ArrayUtils.isNotEmpty(msg.getData())) {
-                ObjectMapper mapper = new ObjectMapper();
-                JsonNode jsonNode = mapper.readTree(msg.getData());
-                Map map = mapper.treeToValue(jsonNode, Map.class);
-                bindings.put(DATA, map);
+            String[] args = new String[3];
+            if (msg.getData() != null) {
+                args[0] = msg.getData();
             } else {
-                bindings.put(DATA, Collections.emptyMap());
+                args[0] = "";
             }
-            bindings.put(METADATA, msg.getMetaData().getData());
-            return bindings;
+            args[1] = mapper.writeValueAsString(msg.getMetaData().getData());
+            args[2] = msg.getType();
+            return args;
         } catch (Throwable th) {
             throw new IllegalArgumentException("Cannot bind js args", th);
         }
     }
 
-    private static TbMsg unbindMsg(Bindings bindings, TbMsg msg) throws JsonProcessingException {
-        for (Map.Entry<String, String> entry : msg.getMetaData().getData().entrySet()) {
-            Object obj = entry.getValue();
-            entry.setValue(obj.toString());
+    private static TbMsg unbindMsg(JsonNode msgData, TbMsg msg) {
+        try {
+            String data = null;
+            Map<String, String> metadata = null;
+            String messageType = null;
+            if (msgData.has(MSG)) {
+                JsonNode msgPayload = msgData.get(MSG);
+                data = mapper.writeValueAsString(msgPayload);
+            }
+            if (msgData.has(METADATA)) {
+                JsonNode msgMetadata = msgData.get(METADATA);
+                metadata = mapper.convertValue(msgMetadata, new TypeReference<Map<String, String>>() {
+                });
+            }
+            if (msgData.has(MSG_TYPE)) {
+                messageType = msgData.get(MSG_TYPE).asText();
+            }
+            String newData = data != null ? data : msg.getData();
+            TbMsgMetaData newMetadata = metadata != null ? new TbMsgMetaData(metadata) : msg.getMetaData();
+            String newMessageType = !StringUtils.isEmpty(messageType) ? messageType : msg.getType();
+            return new TbMsg(msg.getId(), newMessageType, msg.getOriginator(), newMetadata, newData);
+        } catch (Throwable th) {
+            th.printStackTrace();
+            throw new RuntimeException("Failed to unbind message data from javascript result", th);
         }
+    }
 
-        Object payload = bindings.get(DATA);
-        if (payload != null) {
-            ObjectMapper mapper = new ObjectMapper();
-            byte[] bytes = mapper.writeValueAsBytes(payload);
-            return new TbMsg(msg.getId(), msg.getType(), msg.getOriginator(), msg.getMetaData(), bytes);
+    public TbMsg executeUpdate(TbMsg msg) throws ScriptException {
+        JsonNode result = executeScript(msg);
+        if (!result.isObject()) {
+            log.warn("Wrong result type: {}", result.getNodeType());
+            throw new ScriptException("Wrong result type: " + result.getNodeType());
         }
-
-        return msg;
+        return unbindMsg(result, msg);
     }
 
-    public TbMsg executeUpdate(Bindings bindings, TbMsg msg) throws ScriptException {
-        try {
-            engine.eval(bindings);
-            return unbindMsg(bindings, msg);
-        } catch (Throwable th) {
-            th.printStackTrace();
-            throw new IllegalArgumentException("Cannot unbind js args", th);
+    public TbMsg executeGenerate(TbMsg prevMsg) throws ScriptException {
+        JsonNode result = executeScript(prevMsg);
+        if (!result.isObject()) {
+            log.warn("Wrong result type: {}", result.getNodeType());
+            throw new ScriptException("Wrong result type: " + result.getNodeType());
         }
+        return unbindMsg(result, prevMsg);
     }
 
-    public boolean executeFilter(Bindings bindings) throws ScriptException {
-        Object eval = engine.eval(bindings);
-        if (eval instanceof Boolean) {
-            return (boolean) eval;
-        } else {
-            log.warn("Wrong result type: {}", eval);
-            throw new ScriptException("Wrong result type: " + eval);
+    public boolean executeFilter(TbMsg msg) throws ScriptException {
+        JsonNode result = executeScript(msg);
+        if (!result.isBoolean()) {
+            log.warn("Wrong result type: {}", result.getNodeType());
+            throw new ScriptException("Wrong result type: " + result.getNodeType());
         }
+        return result.asBoolean();
     }
 
-    public Set<String> executeSwitch(Bindings bindings) throws ScriptException, NoSuchMethodException {
-        Object eval = this.engine.eval(bindings);
-        if (eval instanceof String) {
-            return Collections.singleton((String) eval);
-        } else if (eval instanceof ScriptObjectMirror) {
-            ScriptObjectMirror mir = (ScriptObjectMirror) eval;
-            if (mir.isArray()) {
-                Set<String> nextStates = Sets.newHashSet();
-                for (Map.Entry<String, Object> entry : mir.entrySet()) {
-                    if (entry.getValue() instanceof String) {
-                        nextStates.add((String) entry.getValue());
-                    } else {
-                        log.warn("Wrong result type: {}", eval);
-                        throw new ScriptException("Wrong result type: " + eval);
-                    }
+    public Set<String> executeSwitch(TbMsg msg) throws ScriptException, NoSuchMethodException {
+        JsonNode result = executeScript(msg);
+        if (result.isTextual()) {
+            return Collections.singleton(result.asText());
+        } else if (result.isArray()) {
+            Set<String> nextStates = Sets.newHashSet();
+            for (JsonNode val : result) {
+                if (!val.isTextual()) {
+                    log.warn("Wrong result type: {}", val.getNodeType());
+                    throw new ScriptException("Wrong result type: " + val.getNodeType());
+                } else {
+                    nextStates.add(val.asText());
                 }
-                return nextStates;
             }
+            return nextStates;
+        } else {
+            log.warn("Wrong result type: {}", result.getNodeType());
+            throw new ScriptException("Wrong result type: " + result.getNodeType());
         }
+    }
 
-        log.warn("Wrong result type: {}", eval);
-        throw new ScriptException("Wrong result type: " + eval);
+    private JsonNode executeScript(TbMsg msg) throws ScriptException {
+        try {
+            String[] inArgs = prepareArgs(msg);
+            String eval = ((Invocable)engine).invokeFunction(this.invokeFunctionName, inArgs[0], inArgs[1], inArgs[2]).toString();
+            return mapper.readTree(eval);
+        } catch (ScriptException | IllegalArgumentException th) {
+            throw th;
+        } catch (Throwable th) {
+            th.printStackTrace();
+            throw new RuntimeException("Failed to execute js script", th);
+        }
     }
 
     public void destroy() {
-        engine = null;
+        //engine = null;
     }
 }

@@ -64,7 +64,7 @@ public class TbMsgTelemetryNode implements TbNode {
             return;
         }
 
-        String src = new String(msg.getData(), StandardCharsets.UTF_8);
+        String src = msg.getData();
         TelemetryUploadRequest telemetryUploadRequest = JsonConverter.convertToTelemetry(new JsonParser().parse(src));
         Map<Long, List<KvEntry>> tsKvMap = telemetryUploadRequest.getData();
         if (tsKvMap == null) {

@@ -28,10 +28,14 @@ import javax.script.Bindings;
         type = ComponentType.TRANSFORMATION,
         name = "script",
         configClazz = TbTransformMsgNodeConfiguration.class,
-        nodeDescription = "Change Message payload and Metadata using JavaScript",
-        nodeDetails = "JavaScript function recieve 2 input parameters that can be changed inside.<br/> " +
+        nodeDescription = "Change Message payload, Metadata or Message type using JavaScript",
+        nodeDetails = "JavaScript function receive 3 input parameters.<br/> " +
                 "<code>metadata</code> - is a Message metadata.<br/>" +
-                "<code>msg</code> - is a Message payload.<br/>Any properties can be changed/removed/added in those objects.",
+                "<code>msg</code> - is a Message payload.<br/>" +
+                "<code>msgType</code> - is a Message type.<br/>" +
+                "Should return the following structure:<br/>" +
+                "<code>{ msg: <new payload>, metadata: <new metadata>, msgType: <new msgType> }</code>" +
+                "All fields in resulting object are optional and will be taken from original message if not specified.",
         uiResources = {"static/rulenode/rulenode-core-config.js", "static/rulenode/rulenode-core-config.css"},
         configDirective = "tbTransformationNodeScriptConfig")
 public class TbTransformMsgNode extends TbAbstractTransformNode {
@@ -48,11 +52,7 @@ public class TbTransformMsgNode extends TbAbstractTransformNode {
 
     @Override
     protected ListenableFuture<TbMsg> transform(TbContext ctx, TbMsg msg) {
-        return ctx.getJsExecutor().executeAsync(() -> jsEngine.executeUpdate(toBindings(msg), msg));
-    }
-
-    private Bindings toBindings(TbMsg msg) {
-        return NashornJsEngine.bindMsg(msg);
+        return ctx.getJsExecutor().executeAsync(() -> jsEngine.executeUpdate(msg));
     }
 
     @Override

@@ -27,7 +27,7 @@ public class TbTransformMsgNodeConfiguration extends TbTransformNodeConfiguratio
     public TbTransformMsgNodeConfiguration defaultConfiguration() {
         TbTransformMsgNodeConfiguration configuration = new TbTransformMsgNodeConfiguration();
         configuration.setStartNewChain(false);
-        configuration.setJsScript("return msg.passed = msg.passed * metadata.temp; msg.bigObj.newProp = 'Ukraine' ");
+        configuration.setJsScript("return {msg: msg, metadata: metadata, msgType: msgType};");
         return configuration;
     }
 }

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n=angular.element(t,a)[0].firstElementChild,r=angular.element(n),i=r.scope().$mdChipsCtrl.getChipBuffer();e.preventDefault(),e.stopPropagation(),r.scope().$mdChipsCtrl.appendChip(i.trim()),r.scope().$mdChipsCtrl.resetChipBuffer()},l.$render=function(){var e=l.$viewValue,t=[];if(e&&e.messageTypes)for(var a=0;a<e.messageTypes.length;a++){var i=e.messageTypes[a];n.messageType[i]?t.push(angular.copy(n.messageType[i])):t.push({name:i,value:i})}r.messageTypes=t,r.$watch("messageTypes",function(e,t){angular.equals(e,t)||s()},!0)},e(a.contents())(r)};return{restrict:"E",require:"^ngModel",scope:{required:"=ngRequired",readonly:"=ngReadonly"},link:r}}a.$inject=["$compile","$filter","ruleNodeTypes"],Object.defineProperty(t,"__esModule",{value:!0}),t.default=a,n(2);var i=n(10),o=r(i)},[38,11],function(e,t,n){"use strict";function r(e){return e&&e.__esModule?e:{default:e}}function a(e){var t=function(t,n,r,a){var i=o.default;n.html(i),t.$watch("configuration",function(e,n){angular.equals(e,n)||a.$setViewValue(t.configuration)}),a.$render=function(){t.configuration=a.$viewValue},e(n.contents())(t)};return{restrict:"E",require:"^ngModel",scope:{},link:t}}a.$inject=["$compile"],Object.defineProperty(t,"__esModule",{value:!0}),t.default=a;var i=n(12),o=r(i)},function(e,t,n){"use strict";function r(e){return e&&e.__esModule?e:{default:e}}function a(e){var t=function(t,n,r,a){function i(e){e>-1&&t.kvList.splice(e,1)}function l(){t.kvList||(t.kvList=[]),t.kvList.push({key:"",value:""})}function s(){var e={};t.kvList.forEach(function(t){t.key&&(e[t.key]=t.value)}),a.$setViewValue(e),u()}function u(){var e=!0;t.required&&!t.kvList.length&&(e=!1),a.$setValidity("kvMap",e)}var d=o.default;n.html(d),t.ngModelCtrl=a,t.removeKeyVal=i,t.addKeyVal=l,t.kvList=[],t.$watch("query",function(e,n){angular.equals(e,n)||a.$setViewValue(t.query)}),a.$render=function(){if(a.$viewValue){var e=a.$viewValue;t.kvList.length=0;for(var n in e)t.kvList.push({key:n,value:e[n]})}t.$watch("kvList",function(e,t){angular.equals(e,t)||s()},!0),u()},e(n.contents())(t)};return{restrict:"E",require:"^ngModel",scope:{required:"=ngRequired",disabled:"=ngDisabled",requiredText:"=",keyText:"=",keyRequiredText:"=",valText:"=",valRequiredText:"="},link:t}}a.$inject=["$compile"],Object.defineProperty(t,"__esModule",{value:!0}),t.default=a;var i=n(13),o=r(i);n(3)},function(e,t,n){"use strict";function r(e){return e&&e.__esModule?e:{default:e}}function a(e,t){var n=function(n,r,a,i){var l=o.default;r.html(l),n.types=t,n.$watch("query",function(e,t){angular.equals(e,t)||i.$setViewValue(n.query)}),i.$render=function(){n.query=i.$viewValue},e(r.contents())(n)};return{restrict:"E",require:"^ngModel",scope:{},link:n}}a.$inject=["$compile","types"],Object.defineProperty(t,"__esModule",{value:!0}),t.default=a;var i=n(14),o=r(i)},function(e,t,n){"use strict";function r(e){return e&&e.__esModule?e:{default:e}}function a(e,t){var n=function(n,r,a,i){var l=o.default;r.html(l),n.ruleNodeTypes=t,n.$watch("configuration",function(e,t){angular.equals(e,t)||i.$setViewValue(n.configuration)}),i.$render=function(){n.configuration=i.$viewValue},e(r.contents())(n)};return{restrict:"E",require:"^ngModel",scope:{},link:n}}a.$inject=["$compile","ruleNodeTypes"],Object.defineProperty(t,"__esModule",{value:!0}),t.default=a;var i=n(15),o=r(i)},function(e,t,n){"use strict";function r(e){return e&&e.__esModule?e:{default:e}}Object.defineProperty(t,"__esModule",{value:!0});var a=n(31),i=r(a),o=n(33),l=r(o);t.default=angular.module("thingsboard.ruleChain.config.transform",[]).directive("tbTransformationNodeChangeOriginatorConfig",i.default).directive("tbTransformationNodeScriptConfig",l.default).name},[38,16],function(e,t,n){"use strict";function r(e){return e&&e.__esModule?e:{default:e}}Object.defineProperty(t,"__esModule",{value:!0});var a=n(37),i=r(a),o=n(25),l=r(o),s=n(21),u=r(s),d=n(32),c=r(d),m=n(18),g=r(m),f=n(30),p=r(f),b=n(29),v=r(b),y=n(36),h=r(y);t.default=angular.module("thingsboard.ruleChain.config",[i.default,l.default,u.default,c.default,g.default]).directive("tbRelationsQueryConfig",p.default).directive("tbKvMapConfig",v.default).config(h.default).name},function(e,t){"use strict";function n(e){var t={tb:{rulenode:{filter:"Filter",switch:"Switch","message-type":"Message type","message-type-required":"Message type is required.","message-types-filter":"Message types filter","no-message-types-found":"No message types found","no-message-type-matching":"'{{messageType}}' not found.","create-new-message-type":"Create a new one!","message-types-required":"Message types are required.","client-attributes":"Client attributes","shared-attributes":"Shared attributes","server-attributes":"Server attributes","latest-timeseries":"Latest timeseries","relations-query":"Relations query","max-relation-level":"Max relation level","unlimited-level":"Unlimited level","latest-telemetry":"Latest telemetry","attr-mapping":"Attributes mapping","source-attribute":"Source attribute","source-attribute-required":"Source attribute is required.","source-telemetry":"Source telemetry","source-telemetry-required":"Source telemetry is required.","target-attribute":"Target attribute","target-attribute-required":"Target attribute is required.","attr-mapping-required":"At least one attribute mapping should be specified.","originator-source":"Originator source","originator-customer":"Customer","originator-tenant":"Tenant","originator-related":"Related","clone-message":"Clone message",transform:"Transform","default-ttl":"Default TTL in seconds","default-ttl-required":"Default TTL is required.","min-default-ttl-message":"Only 0 minimum TTL is allowed.","message-count":"Message count (0 - unlimited)","message-count-required":"Message count is required.","min-message-count-message":"Only 0 minimum message count is allowed.","period-seconds":"Period in seconds","period-seconds-required":"Period is required.","min-period-seconds-message":"Only 1 second minimum period is allowed.",originator:"Originator","message-body":"Message body","message-metadata":"Message metadata",generate:"Generate"},"key-val":{key:"Key",value:"Value","remove-entry":"Remove entry","add-entry":"Add entry"}}};angular.merge(e.en_US,t)}Object.defineProperty(t,"__esModule",{value:!0}),t.default=n},function(e,t,n){"use strict";function r(e){return e&&e.__esModule?e:{default:e}}function a(e,t){(0,o.default)(t);for(var n in t){var r=t[n];e.translations(n,r)}}a.$inject=["$translateProvider","locales"],Object.defineProperty(t,"__esModule",{value:!0}),t.default=a;var i=n(35),o=r(i)},function(e,t){"use strict";Object.defineProperty(t,"__esModule",{value:!0}),t.default=angular.module("thingsboard.ruleChain.config.types",[]).constant("ruleNodeTypes",{messageType:{POST_ATTRIBUTES:{name:"Post attributes",value:"POST_ATTRIBUTES"},POST_TELEMETRY:{name:"Post telemetry",value:"POST_TELEMETRY"},RPC_REQUEST:{name:"RPC Request",value:"RPC_REQUEST"}},originatorSource:{CUSTOMER:{name:"tb.rulenode.originator-customer",value:"CUSTOMER"},TENANT:{name:"tb.rulenode.originator-tenant",value:"TENANT"},RELATED:{name:"tb.rulenode.originator-related",value:"RELATED"}}}).name},function(e,t,n,r){"use strict";function a(e){return e&&e.__esModule?e:{default:e}}function i(e){var t=function(t,n,r,a){var i=l.default;n.html(i),t.$watch("configuration",function(e,n){angular.equals(e,n)||a.$setViewValue(t.configuration)}),a.$render=function(){t.configuration=a.$viewValue},e(n.contents())(t)};return{restrict:"E",require:"^ngModel",scope:{},link:t}}i.$inject=["$compile"],Object.defineProperty(t,"__esModule",{value:!0}),t.default=i;var o=n(r),l=a(o)}]));
 //# sourceMappingURL=rulenode-core-config.js.map
\ No newline at end of file

@@ -52,7 +52,7 @@ public class TbJsFilterNodeTest {
     @Test
     public void falseEvaluationDoNotSendMsg() throws TbNodeException {
         initWithScript("return 10 > 15;");
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, new TbMsgMetaData(), "{}".getBytes());
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, new TbMsgMetaData(), "{}");
 
         mockJsExecutor();
 
@@ -65,7 +65,7 @@ public class TbJsFilterNodeTest {
     @Test
     public void notValidMsgDataThrowsException() throws TbNodeException {
         initWithScript("return 10 > 15;");
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, new TbMsgMetaData(), new byte[4]);
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, null, "{}");
 
         when(ctx.getJsExecutor()).thenReturn(executor);
 
@@ -79,11 +79,11 @@ public class TbJsFilterNodeTest {
     public void exceptionInJsThrowsException() throws TbNodeException {
         initWithScript("return metadata.temp.curr < 15;");
         TbMsgMetaData metaData = new TbMsgMetaData();
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, "{}".getBytes());
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, "{}");
         mockJsExecutor();
 
         node.onMsg(ctx, msg);
-        String expectedMessage = "TypeError: Cannot get property \"curr\" of null in <eval> at line number 1";
+        String expectedMessage = "TypeError: Cannot read property \"curr\" from undefined in <eval> at line number 1";
         verifyError(msg, expectedMessage, ScriptException.class);
     }
 
@@ -98,7 +98,7 @@ public class TbJsFilterNodeTest {
         TbMsgMetaData metaData = new TbMsgMetaData();
         metaData.putValue("temp", "10");
         metaData.putValue("humidity", "99");
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, "{}".getBytes());
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, "{}");
         mockJsExecutor();
 
         node.onMsg(ctx, msg);
@@ -113,7 +113,7 @@ public class TbJsFilterNodeTest {
         TbMsgMetaData metaData = new TbMsgMetaData();
         metaData.putValue("temp", "10");
         metaData.putValue("humidity", "99");
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, "{}".getBytes());
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, "{}");
         mockJsExecutor();
 
         node.onMsg(ctx, msg);
@@ -129,7 +129,7 @@ public class TbJsFilterNodeTest {
         metaData.putValue("humidity", "99");
         String rawJson = "{\"name\": \"Vit\", \"passed\": 5, \"bigObj\": {\"prop\":42}}";
 
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, rawJson.getBytes());
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, rawJson);
         mockJsExecutor();
 
         node.onMsg(ctx, msg);

@@ -68,7 +68,7 @@ public class TbJsSwitchNodeTest {
         metaData.putValue("humidity", "99");
         String rawJson = "{\"name\": \"Vit\", \"passed\": 5}";
 
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, rawJson.getBytes());
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, rawJson);
         mockJsExecutor();
 
         node.onMsg(ctx, msg);
@@ -92,7 +92,7 @@ public class TbJsSwitchNodeTest {
         metaData.putValue("humidity", "99");
         String rawJson = "{\"name\": \"Vit\", \"passed\": 5}";
 
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, rawJson.getBytes());
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, rawJson);
         mockJsExecutor();
 
         node.onMsg(ctx, msg);

@@ -98,7 +98,7 @@ public class TbGetCustomerAttributeNodeTest {
         User user = new User();
         user.setCustomerId(customerId);
 
-        msg = new TbMsg(UUIDs.timeBased(), "USER", userId, new TbMsgMetaData(), new byte[4]);
+        msg = new TbMsg(UUIDs.timeBased(), "USER", userId, new TbMsgMetaData(), "{}");
 
         when(ctx.getUserService()).thenReturn(userService);
         when(userService.findUserByIdAsync(userId)).thenReturn(Futures.immediateFuture(user));
@@ -123,7 +123,7 @@ public class TbGetCustomerAttributeNodeTest {
         User user = new User();
         user.setCustomerId(customerId);
 
-        msg = new TbMsg(UUIDs.timeBased(), "USER", userId, new TbMsgMetaData(), new byte[4]);
+        msg = new TbMsg(UUIDs.timeBased(), "USER", userId, new TbMsgMetaData(), "{}");
 
         when(ctx.getUserService()).thenReturn(userService);
         when(userService.findUserByIdAsync(userId)).thenReturn(Futures.immediateFuture(user));
@@ -148,7 +148,7 @@ public class TbGetCustomerAttributeNodeTest {
         User user = new User();
         user.setCustomerId(customerId);
 
-        msg = new TbMsg(UUIDs.timeBased(), "USER", userId, new TbMsgMetaData(), new byte[4]);
+        msg = new TbMsg(UUIDs.timeBased(), "USER", userId, new TbMsgMetaData(), "{}");
 
         when(ctx.getUserService()).thenReturn(userService);
         when(userService.findUserByIdAsync(userId)).thenReturn(Futures.immediateFuture(null));
@@ -166,7 +166,7 @@ public class TbGetCustomerAttributeNodeTest {
     @Test
     public void customerAttributeAddedInMetadata() {
         CustomerId customerId = new CustomerId(UUIDs.timeBased());
-        msg = new TbMsg(UUIDs.timeBased(), "CUSTOMER", customerId, new TbMsgMetaData(), new byte[4]);
+        msg = new TbMsg(UUIDs.timeBased(), "CUSTOMER", customerId, new TbMsgMetaData(), "{}");
         entityAttributeFetched(customerId);
     }
 
@@ -177,7 +177,7 @@ public class TbGetCustomerAttributeNodeTest {
         User user = new User();
         user.setCustomerId(customerId);
 
-        msg = new TbMsg(UUIDs.timeBased(), "USER", userId, new TbMsgMetaData(), new byte[4]);
+        msg = new TbMsg(UUIDs.timeBased(), "USER", userId, new TbMsgMetaData(), "{}");
 
         when(ctx.getUserService()).thenReturn(userService);
         when(userService.findUserByIdAsync(userId)).thenReturn(Futures.immediateFuture(user));
@@ -192,7 +192,7 @@ public class TbGetCustomerAttributeNodeTest {
         Asset asset = new Asset();
         asset.setCustomerId(customerId);
 
-        msg = new TbMsg(UUIDs.timeBased(), "USER", assetId, new TbMsgMetaData(), new byte[4]);
+        msg = new TbMsg(UUIDs.timeBased(), "USER", assetId, new TbMsgMetaData(), "{}");
 
         when(ctx.getAssetService()).thenReturn(assetService);
         when(assetService.findAssetByIdAsync(assetId)).thenReturn(Futures.immediateFuture(asset));
@@ -207,7 +207,7 @@ public class TbGetCustomerAttributeNodeTest {
         Device device = new Device();
         device.setCustomerId(customerId);
 
-        msg = new TbMsg(UUIDs.timeBased(), "USER", deviceId, new TbMsgMetaData(), new byte[4]);
+        msg = new TbMsg(UUIDs.timeBased(), "USER", deviceId, new TbMsgMetaData(), "{}");
 
         when(ctx.getDeviceService()).thenReturn(deviceService);
         when(deviceService.findDeviceByIdAsync(deviceId)).thenReturn(Futures.immediateFuture(device));
@@ -234,7 +234,7 @@ public class TbGetCustomerAttributeNodeTest {
         Device device = new Device();
         device.setCustomerId(customerId);
 
-        msg = new TbMsg(UUIDs.timeBased(), "USER", deviceId, new TbMsgMetaData(), new byte[4]);
+        msg = new TbMsg(UUIDs.timeBased(), "USER", deviceId, new TbMsgMetaData(), "{}");
 
         when(ctx.getDeviceService()).thenReturn(deviceService);
         when(deviceService.findDeviceByIdAsync(deviceId)).thenReturn(Futures.immediateFuture(device));

@@ -57,7 +57,7 @@ public class TbChangeOriginatorNodeTest {
         Asset asset = new Asset();
         asset.setCustomerId(customerId);
 
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "ASSET", assetId, new TbMsgMetaData(), new byte[4]);
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "ASSET", assetId, new TbMsgMetaData(), "{}");
 
         when(ctx.getAssetService()).thenReturn(assetService);
         when(assetService.findAssetByIdAsync(assetId)).thenReturn(Futures.immediateFuture(asset));
@@ -78,7 +78,7 @@ public class TbChangeOriginatorNodeTest {
         Asset asset = new Asset();
         asset.setCustomerId(customerId);
 
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "ASSET", assetId, new TbMsgMetaData(), new byte[4]);
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "ASSET", assetId, new TbMsgMetaData(), "{}");
 
         when(ctx.getAssetService()).thenReturn(assetService);
         when(assetService.findAssetByIdAsync(assetId)).thenReturn(Futures.immediateFuture(asset));
@@ -99,7 +99,7 @@ public class TbChangeOriginatorNodeTest {
         Asset asset = new Asset();
         asset.setCustomerId(customerId);
 
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "ASSET", assetId, new TbMsgMetaData(), new byte[4]);
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "ASSET", assetId, new TbMsgMetaData(), "{}");
 
         when(ctx.getAssetService()).thenReturn(assetService);
         when(assetService.findAssetByIdAsync(assetId)).thenReturn(Futures.immediateFailedFuture(new IllegalStateException("wrong")));

@@ -51,13 +51,13 @@ public class TbTransformMsgNodeTest {
 
     @Test
     public void metadataCanBeUpdated() throws TbNodeException {
-        initWithScript("return metadata.temp = metadata.temp * 10;");
+        initWithScript("metadata.temp = metadata.temp * 10; return {metadata: metadata};");
         TbMsgMetaData metaData = new TbMsgMetaData();
         metaData.putValue("temp", "7");
         metaData.putValue("humidity", "99");
         String rawJson = "{\"name\": \"Vit\", \"passed\": 5, \"bigObj\": {\"prop\":42}}";
 
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, rawJson.getBytes());
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, rawJson);
         mockJsExecutor();
 
         node.onMsg(ctx, msg);
@@ -65,18 +65,18 @@ public class TbTransformMsgNodeTest {
         ArgumentCaptor<TbMsg> captor = ArgumentCaptor.forClass(TbMsg.class);
         verify(ctx).tellNext(captor.capture());
         TbMsg actualMsg = captor.getValue();
-        assertEquals("70.0", actualMsg.getMetaData().getValue("temp"));
+        assertEquals("70", actualMsg.getMetaData().getValue("temp"));
     }
 
     @Test
     public void metadataCanBeAdded() throws TbNodeException {
-        initWithScript("return metadata.newAttr = metadata.humidity - msg.passed;");
+        initWithScript("metadata.newAttr = metadata.humidity - msg.passed; return {metadata: metadata};");
         TbMsgMetaData metaData = new TbMsgMetaData();
         metaData.putValue("temp", "7");
         metaData.putValue("humidity", "99");
         String rawJson = "{\"name\": \"Vit\", \"passed\": 5, \"bigObj\": {\"prop\":42}}";
 
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, rawJson.getBytes());
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, rawJson);
         mockJsExecutor();
 
         node.onMsg(ctx, msg);
@@ -84,18 +84,18 @@ public class TbTransformMsgNodeTest {
         ArgumentCaptor<TbMsg> captor = ArgumentCaptor.forClass(TbMsg.class);
         verify(ctx).tellNext(captor.capture());
         TbMsg actualMsg = captor.getValue();
-        assertEquals("94.0", actualMsg.getMetaData().getValue("newAttr"));
+        assertEquals("94", actualMsg.getMetaData().getValue("newAttr"));
     }
 
     @Test
     public void payloadCanBeUpdated() throws TbNodeException {
-        initWithScript("msg.passed = msg.passed * metadata.temp; return msg.bigObj.newProp = 'Ukraine' ");
+        initWithScript("msg.passed = msg.passed * metadata.temp; msg.bigObj.newProp = 'Ukraine'; return {msg: msg};");
         TbMsgMetaData metaData = new TbMsgMetaData();
         metaData.putValue("temp", "7");
         metaData.putValue("humidity", "99");
         String rawJson = "{\"name\":\"Vit\",\"passed\": 5,\"bigObj\":{\"prop\":42}}";
 
-        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, rawJson.getBytes());
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, rawJson);
         mockJsExecutor();
 
         node.onMsg(ctx, msg);
@@ -103,7 +103,7 @@ public class TbTransformMsgNodeTest {
         ArgumentCaptor<TbMsg> captor = ArgumentCaptor.forClass(TbMsg.class);
         verify(ctx).tellNext(captor.capture());
         TbMsg actualMsg = captor.getValue();
-        String expectedJson = "{\"name\":\"Vit\",\"passed\":35.0,\"bigObj\":{\"prop\":42,\"newProp\":\"Ukraine\"}}";
+        String expectedJson = "{\"name\":\"Vit\",\"passed\":35,\"bigObj\":{\"prop\":42,\"newProp\":\"Ukraine\"}}";
         assertEquals(expectedJson, new String(actualMsg.getData()));
     }