thingsboard-developers

diff --git a/rule-engine/rule-engine-api/src/main/java/org/thingsboard/rule/engine/api/ListeningExecutor.java b/rule-engine/rule-engine-api/src/main/java/org/thingsboard/rule/engine/api/ListeningExecutor.java
new file mode 100644
index 0000000..a233cb3
--- /dev/null
+++ b/rule-engine/rule-engine-api/src/main/java/org/thingsboard/rule/engine/api/ListeningExecutor.java
@@ -0,0 +1,12 @@
+package org.thingsboard.rule.engine.api;
+
+import com.google.common.util.concurrent.ListenableFuture;
+
+import java.util.concurrent.Callable;
+
+public interface ListeningExecutor {
+
+    <T> ListenableFuture<T> executeAsync(Callable<T> task);
+
+    void onDestroy();
+}

diff --git a/rule-engine/rule-engine-api/src/main/java/org/thingsboard/rule/engine/api/TbContext.java b/rule-engine/rule-engine-api/src/main/java/org/thingsboard/rule/engine/api/TbContext.java
index 541d35b..c7e2bec 100644
--- a/rule-engine/rule-engine-api/src/main/java/org/thingsboard/rule/engine/api/TbContext.java
+++ b/rule-engine/rule-engine-api/src/main/java/org/thingsboard/rule/engine/api/TbContext.java
@@ -74,4 +74,6 @@ public interface TbContext {
 
     RelationService getRelationService();
 
+    ListeningExecutor getJsExecutor();
+
 }

diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/filter/TbJsFilterNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/filter/TbJsFilterNode.java
new file mode 100644
index 0000000..476695e
--- /dev/null
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/filter/TbJsFilterNode.java
@@ -0,0 +1,51 @@
+package org.thingsboard.rule.engine.filter;
+
+import lombok.extern.slf4j.Slf4j;
+import org.thingsboard.rule.engine.TbNodeUtils;
+import org.thingsboard.rule.engine.api.*;
+import org.thingsboard.rule.engine.js.NashornJsEngine;
+import org.thingsboard.server.common.msg.TbMsg;
+
+import javax.script.Bindings;
+
+import static org.thingsboard.rule.engine.DonAsynchron.withCallback;
+
+@Slf4j
+public class TbJsFilterNode implements TbNode {
+
+    private TbJsFilterNodeConfiguration config;
+    private NashornJsEngine jsEngine;
+
+    @Override
+    public void init(TbNodeConfiguration configuration, TbNodeState state) throws TbNodeException {
+        this.config = TbNodeUtils.convert(configuration, TbJsFilterNodeConfiguration.class);
+        this.jsEngine = new NashornJsEngine(config.getJsScript());
+    }
+
+    @Override
+    public void onMsg(TbContext ctx, TbMsg msg) {
+        ListeningExecutor jsExecutor = ctx.getJsExecutor();
+        withCallback(jsExecutor.executeAsync(() -> jsEngine.executeFilter(toBindings(msg))),
+                result -> processFilter(ctx, msg, result),
+                t -> ctx.tellError(msg, t));
+    }
+
+    private void processFilter(TbContext ctx, TbMsg msg, Boolean filterResult) {
+        if (filterResult) {
+            ctx.tellNext(msg);
+        } else {
+            log.debug("Msg filtered out {}", msg.getId());
+        }
+    }
+
+    private Bindings toBindings(TbMsg msg) {
+        return NashornJsEngine.bindMsg(msg);
+    }
+
+    @Override
+    public void destroy() {
+        if (jsEngine != null) {
+            jsEngine.destroy();
+        }
+    }
+}

diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/filter/TbJsFilterNodeConfiguration.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/filter/TbJsFilterNodeConfiguration.java
new file mode 100644
index 0000000..488fa44
--- /dev/null
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/filter/TbJsFilterNodeConfiguration.java
@@ -0,0 +1,9 @@
+package org.thingsboard.rule.engine.filter;
+
+import lombok.Data;
+
+@Data
+public class TbJsFilterNodeConfiguration {
+
+    private String jsScript;
+}

diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/filter/TbJsSwitchNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/filter/TbJsSwitchNode.java
new file mode 100644
index 0000000..5d1514a
--- /dev/null
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/filter/TbJsSwitchNode.java
@@ -0,0 +1,56 @@
+package org.thingsboard.rule.engine.filter;
+
+import lombok.extern.slf4j.Slf4j;
+import org.thingsboard.rule.engine.TbNodeUtils;
+import org.thingsboard.rule.engine.api.*;
+import org.thingsboard.rule.engine.js.NashornJsEngine;
+import org.thingsboard.server.common.msg.TbMsg;
+
+import javax.script.Bindings;
+
+import static org.thingsboard.rule.engine.DonAsynchron.withCallback;
+
+@Slf4j
+public class TbJsSwitchNode implements TbNode {
+
+    private TbJsSwitchNodeConfiguration config;
+    private NashornJsEngine jsEngine;
+
+    @Override
+    public void init(TbNodeConfiguration configuration, TbNodeState state) throws TbNodeException {
+        this.config = TbNodeUtils.convert(configuration, TbJsSwitchNodeConfiguration.class);
+        this.jsEngine = new NashornJsEngine(config.getJsScript());
+        if (config.getAllowedRelations().size() < 1) {
+            String message = "Switch node should have at least 1 relation";
+            log.error(message);
+            throw new IllegalStateException(message);
+        }
+    }
+
+    @Override
+    public void onMsg(TbContext ctx, TbMsg msg) {
+        ListeningExecutor jsExecutor = ctx.getJsExecutor();
+        withCallback(jsExecutor.executeAsync(() -> jsEngine.executeSwitch(toBindings(msg))),
+                result -> processSwitch(ctx, msg, result),
+                t -> ctx.tellError(msg, t));
+    }
+
+    private void processSwitch(TbContext ctx, TbMsg msg, String nextRelation) {
+        if (config.getAllowedRelations().contains(nextRelation)) {
+            ctx.tellNext(msg, nextRelation);
+        } else {
+            ctx.tellError(msg, new IllegalStateException("Unsupported relation for switch " + nextRelation));
+        }
+    }
+
+    private Bindings toBindings(TbMsg msg) {
+        return NashornJsEngine.bindMsg(msg);
+    }
+
+    @Override
+    public void destroy() {
+        if (jsEngine != null) {
+            jsEngine.destroy();
+        }
+    }
+}

diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/filter/TbJsSwitchNodeConfiguration.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/filter/TbJsSwitchNodeConfiguration.java
new file mode 100644
index 0000000..a179c96
--- /dev/null
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/filter/TbJsSwitchNodeConfiguration.java
@@ -0,0 +1,12 @@
+package org.thingsboard.rule.engine.filter;
+
+import lombok.Data;
+
+import java.util.Set;
+
+@Data
+public class TbJsSwitchNodeConfiguration {
+
+    private String jsScript;
+    private Set<String> allowedRelations;
+}

diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/js/JsExecutorService.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/js/JsExecutorService.java
new file mode 100644
index 0000000..8991885
--- /dev/null
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/js/JsExecutorService.java
@@ -0,0 +1,30 @@
+package org.thingsboard.rule.engine.js;
+
+import com.google.common.util.concurrent.ListenableFuture;
+import com.google.common.util.concurrent.ListeningExecutorService;
+import com.google.common.util.concurrent.MoreExecutors;
+import org.thingsboard.rule.engine.api.ListeningExecutor;
+
+import javax.annotation.PreDestroy;
+import java.util.concurrent.Callable;
+import java.util.concurrent.Executors;
+
+public class JsExecutorService implements ListeningExecutor{
+
+    private final ListeningExecutorService service;
+
+    public JsExecutorService(int threadCount) {
+        this.service = MoreExecutors.listeningDecorator(Executors.newFixedThreadPool(threadCount));
+    }
+
+    @Override
+    public <T> ListenableFuture<T> executeAsync(Callable<T> task) {
+        return service.submit(task);
+    }
+
+    @PreDestroy
+    @Override
+    public void onDestroy() {
+        service.shutdown();
+    }
+}

diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/js/NashornJsEngine.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/js/NashornJsEngine.java
new file mode 100644
index 0000000..c64cf72
--- /dev/null
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/js/NashornJsEngine.java
@@ -0,0 +1,79 @@
+package org.thingsboard.rule.engine.js;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import jdk.nashorn.api.scripting.NashornScriptEngineFactory;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.lang3.ArrayUtils;
+import org.thingsboard.server.common.msg.TbMsg;
+
+import javax.script.*;
+import java.util.Map;
+
+
+@Slf4j
+public class NashornJsEngine {
+
+    public static final String METADATA = "meta";
+    public static final String DATA = "msg";
+    private static NashornScriptEngineFactory factory = new NashornScriptEngineFactory();
+
+    private CompiledScript engine;
+
+    public NashornJsEngine(String script) {
+        engine = compileScript(script);
+    }
+
+    private static CompiledScript compileScript(String script) {
+        ScriptEngine engine = factory.getScriptEngine(new String[]{"--no-java"});
+        Compilable compEngine = (Compilable) engine;
+        try {
+            return compEngine.compile(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) {
+        try {
+            Bindings bindings = new SimpleBindings();
+            bindings.put(METADATA, msg.getMetaData().getData());
+
+            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);
+            }
+
+            return bindings;
+        } catch (Throwable th) {
+            throw new IllegalArgumentException("Cannot bind js args", th);
+        }
+    }
+
+    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 String executeSwitch(Bindings bindings) throws ScriptException, NoSuchMethodException {
+        Object eval = this.engine.eval(bindings);
+        if (eval instanceof String) {
+            return (String) eval;
+        } else {
+            log.warn("Wrong result type: {}", eval);
+            throw new ScriptException("Wrong result type: " + eval);
+        }
+    }
+
+    public void destroy() {
+        engine = null;
+    }
+}

diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/metadata/TbGetAttributesNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/metadata/TbGetAttributesNode.java
index 4d41921..bc6bc4a 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/metadata/TbGetAttributesNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/metadata/TbGetAttributesNode.java
@@ -1,12 +1,12 @@
 /**
  * Copyright © 2016-2018 The Thingsboard Authors
- *
+ * <p>
  * 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
- *
+ * <p>
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * <p>
  * 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.
@@ -15,13 +15,16 @@
  */
 package org.thingsboard.rule.engine.metadata;
 
-import com.google.common.util.concurrent.AsyncFunction;
+import com.google.common.base.Function;
 import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListenableFuture;
 import lombok.extern.slf4j.Slf4j;
+import org.apache.commons.collections.CollectionUtils;
 import org.thingsboard.rule.engine.TbNodeUtils;
 import org.thingsboard.rule.engine.api.*;
 import org.thingsboard.server.common.data.kv.AttributeKvEntry;
+import org.thingsboard.server.common.data.kv.KvEntry;
+import org.thingsboard.server.common.data.kv.TsKvEntry;
 import org.thingsboard.server.common.msg.TbMsg;
 
 import java.util.List;
@@ -44,24 +47,40 @@ public class TbGetAttributesNode implements TbNode {
 
     @Override
     public void onMsg(TbContext ctx, TbMsg msg) throws TbNodeException {
-        ListenableFuture<List<Void>> future = Futures.allAsList(
-                putAttrAsync(ctx, msg, CLIENT_SCOPE, config.getClientAttributeNames(), "cs."),
-                putAttrAsync(ctx, msg, SHARED_SCOPE, config.getSharedAttributeNames(), "shared."),
-                putAttrAsync(ctx, msg, SERVER_SCOPE, config.getServerAttributeNames(), "ss."));
+        if (CollectionUtils.isNotEmpty(config.getLatestTsKeyNames())) {
+            withCallback(getLatestTelemetry(ctx, msg, config.getLatestTsKeyNames()),
+                    i -> ctx.tellNext(msg),
+                    t -> ctx.tellError(msg, t));
+        } else {
+            ListenableFuture<List<Void>> future = Futures.allAsList(
+                    putAttrAsync(ctx, msg, CLIENT_SCOPE, config.getClientAttributeNames(), "cs."),
+                    putAttrAsync(ctx, msg, SHARED_SCOPE, config.getSharedAttributeNames(), "shared."),
+                    putAttrAsync(ctx, msg, SERVER_SCOPE, config.getServerAttributeNames(), "ss."));
 
-        withCallback(future, i -> ctx.tellNext(msg), t -> ctx.tellError(msg, t));
+            withCallback(future, i -> ctx.tellNext(msg), t -> ctx.tellError(msg, t));
+        }
     }
 
-    private ListenableFuture<Void> putAttributesAsync(TbMsg msg, List<AttributeKvEntry> attributes, String prefix) {
+    private ListenableFuture<Void> putAttr(TbMsg msg, List<KvEntry> attributes, String prefix) {
         attributes.forEach(r -> msg.getMetaData().putValue(prefix + r.getKey(), r.getValueAsString()));
         return Futures.immediateFuture(null);
     }
 
     private ListenableFuture<Void> putAttrAsync(TbContext ctx, TbMsg msg, String scope, List<String> attributes, String prefix) {
-        return Futures.transform(ctx.getAttributesService().find(msg.getOriginator(), scope, attributes),
-                (AsyncFunction<List<AttributeKvEntry>, Void>) i -> putAttributesAsync(msg, i, prefix));
+        ListenableFuture<List<AttributeKvEntry>> latest = ctx.getAttributesService().find(msg.getOriginator(), scope, attributes);
+        return Futures.transform(latest, (Function<? super List<AttributeKvEntry>, Void>) l -> {
+            l.forEach(r -> msg.getMetaData().putValue(prefix + r.getKey(), r.getValueAsString()));
+            return null;
+        });
     }
 
+    private ListenableFuture<Void> getLatestTelemetry(TbContext ctx, TbMsg msg, List<String> attributes) {
+        ListenableFuture<List<TsKvEntry>> latest = ctx.getTimeseriesService().findLatest(msg.getOriginator(), attributes);
+        return Futures.transform(latest, (Function<? super List<TsKvEntry>, Void>) l -> {
+            l.forEach(r -> msg.getMetaData().putValue(r.getKey(), r.getValueAsString()));
+            return null;
+        });
+    }
 
     @Override
     public void destroy() {

diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/metadata/TbGetAttributesNodeConfiguration.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/metadata/TbGetAttributesNodeConfiguration.java
index b54edef..ad92314 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/metadata/TbGetAttributesNodeConfiguration.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/metadata/TbGetAttributesNodeConfiguration.java
@@ -29,4 +29,6 @@ public class TbGetAttributesNodeConfiguration {
     private List<String> sharedAttributeNames;
     private List<String> serverAttributeNames;
 
+    private List<String> latestTsKeyNames;
+
 }

diff --git a/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/filter/TbJsFilterNodeTest.java b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/filter/TbJsFilterNodeTest.java
new file mode 100644
index 0000000..6a4bec2
--- /dev/null
+++ b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/filter/TbJsFilterNodeTest.java
@@ -0,0 +1,154 @@
+package org.thingsboard.rule.engine.filter;
+
+import com.datastax.driver.core.utils.UUIDs;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Matchers;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+import org.mockito.stubbing.Answer;
+import org.thingsboard.rule.engine.api.ListeningExecutor;
+import org.thingsboard.rule.engine.api.TbContext;
+import org.thingsboard.rule.engine.api.TbNodeConfiguration;
+import org.thingsboard.rule.engine.api.TbNodeException;
+import org.thingsboard.server.common.msg.TbMsg;
+import org.thingsboard.server.common.msg.TbMsgMetaData;
+
+import javax.script.ScriptException;
+import java.util.concurrent.Callable;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.*;
+
+@RunWith(MockitoJUnitRunner.class)
+public class TbJsFilterNodeTest {
+
+    private TbJsFilterNode node;
+
+    @Mock
+    private TbContext ctx;
+    @Mock
+    private ListeningExecutor executor;
+
+    @Test
+    public void falseEvaluationDoNotSendMsg() throws TbNodeException {
+        initWithScript("10 > 15;");
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, new TbMsgMetaData(), "{}".getBytes());
+
+        mockJsExecutor();
+
+        node.onMsg(ctx, msg);
+        verify(ctx).getJsExecutor();
+        verifyNoMoreInteractions(ctx);
+    }
+
+    @Test
+    public void notValidMsgDataThrowsException() throws TbNodeException {
+        initWithScript("10 > 15;");
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, new TbMsgMetaData(), new byte[4]);
+
+        when(ctx.getJsExecutor()).thenReturn(executor);
+
+        mockJsExecutor();
+
+        node.onMsg(ctx, msg);
+        verifyError(msg, "Cannot bind js args", IllegalArgumentException.class);
+    }
+
+    @Test
+    public void exceptionInJsThrowsException() throws TbNodeException {
+        initWithScript("meta.temp.curr < 15;");
+        TbMsgMetaData metaData = new TbMsgMetaData();
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, "{}".getBytes());
+        mockJsExecutor();
+
+        node.onMsg(ctx, msg);
+        String expectedMessage = "TypeError: Cannot get property \"curr\" of null in <eval> at line number 1";
+        verifyError(msg, expectedMessage, ScriptException.class);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void notValidScriptThrowsException() throws TbNodeException {
+        initWithScript("10 > 15 asdq out");
+    }
+
+    @Test
+    public void metadataConditionCanBeFalse() throws TbNodeException {
+        initWithScript("meta.humidity < 15;");
+        TbMsgMetaData metaData = new TbMsgMetaData();
+        metaData.putValue("temp", "10");
+        metaData.putValue("humidity", "99");
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, "{}".getBytes());
+        mockJsExecutor();
+
+        node.onMsg(ctx, msg);
+        verify(ctx).getJsExecutor();
+        verifyNoMoreInteractions(ctx);
+    }
+
+    @Test
+    public void metadataConditionCanBeTrue() throws TbNodeException {
+        initWithScript("meta.temp < 15;");
+        TbMsgMetaData metaData = new TbMsgMetaData();
+        metaData.putValue("temp", "10");
+        metaData.putValue("humidity", "99");
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, "{}".getBytes());
+        mockJsExecutor();
+
+        node.onMsg(ctx, msg);
+        verify(ctx).getJsExecutor();
+        verify(ctx).tellNext(msg);
+    }
+
+    @Test
+    public void msgJsonParsedAndBinded() throws TbNodeException {
+        initWithScript("msg.passed < 15 && msg.name === 'Vit' && meta.temp == 10 && msg.bigObj.prop == 42;");
+        TbMsgMetaData metaData = new TbMsgMetaData();
+        metaData.putValue("temp", "10");
+        metaData.putValue("humidity", "99");
+        String rawJson = "{\"name\": \"Vit\", \"passed\": 5, \"bigObj\": {\"prop\":42}}";
+
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, rawJson.getBytes());
+        mockJsExecutor();
+
+        node.onMsg(ctx, msg);
+        verify(ctx).getJsExecutor();
+        verify(ctx).tellNext(msg);
+    }
+
+    private void initWithScript(String script) throws TbNodeException {
+        TbJsFilterNodeConfiguration config = new TbJsFilterNodeConfiguration();
+        config.setJsScript(script);
+        ObjectMapper mapper = new ObjectMapper();
+        TbNodeConfiguration nodeConfiguration = new TbNodeConfiguration();
+        nodeConfiguration.setData(mapper.valueToTree(config));
+
+        node = new TbJsFilterNode();
+        node.init(nodeConfiguration, null);
+    }
+
+    private void mockJsExecutor() {
+        when(ctx.getJsExecutor()).thenReturn(executor);
+        doAnswer((Answer<ListenableFuture<Boolean>>) invocationOnMock -> {
+            try {
+                Callable task = (Callable) (invocationOnMock.getArguments())[0];
+                return Futures.immediateFuture((Boolean) task.call());
+            } catch (Throwable th) {
+                return Futures.immediateFailedFuture(th);
+            }
+        }).when(executor).executeAsync(Matchers.any(Callable.class));
+    }
+
+    private void verifyError(TbMsg msg, String message, Class expectedClass) {
+        ArgumentCaptor<Throwable> captor = ArgumentCaptor.forClass(Throwable.class);
+        verify(ctx).tellError(same(msg), captor.capture());
+
+        Throwable value = captor.getValue();
+        assertEquals(expectedClass, value.getClass());
+        assertEquals(message, value.getMessage());
+    }
+}
\ No newline at end of file

diff --git a/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/filter/TbJsSwitchNodeTest.java b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/filter/TbJsSwitchNodeTest.java
new file mode 100644
index 0000000..6ffa83b
--- /dev/null
+++ b/rule-engine/rule-engine-components/src/test/java/org/thingsboard/rule/engine/filter/TbJsSwitchNodeTest.java
@@ -0,0 +1,118 @@
+package org.thingsboard.rule.engine.filter;
+
+import com.datastax.driver.core.utils.UUIDs;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.collect.Sets;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Matchers;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+import org.mockito.stubbing.Answer;
+import org.thingsboard.rule.engine.api.ListeningExecutor;
+import org.thingsboard.rule.engine.api.TbContext;
+import org.thingsboard.rule.engine.api.TbNodeConfiguration;
+import org.thingsboard.rule.engine.api.TbNodeException;
+import org.thingsboard.server.common.msg.TbMsg;
+import org.thingsboard.server.common.msg.TbMsgMetaData;
+
+import java.util.Set;
+import java.util.concurrent.Callable;
+
+import static org.junit.Assert.*;
+import static org.mockito.Matchers.same;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@RunWith(MockitoJUnitRunner.class)
+public class TbJsSwitchNodeTest {
+
+    private TbJsSwitchNode node;
+
+    @Mock
+    private TbContext ctx;
+    @Mock
+    private ListeningExecutor executor;
+
+    @Test
+    public void allowedRelationPassed() throws TbNodeException {
+        String jsCode = "function nextRelation(meta, msg) {\n" +
+                "    if(msg.passed == 5 && meta.temp == 10)\n" +
+                "        return 'one'\n" +
+                "    else\n" +
+                "        return 'two';\n" +
+                "};\n" +
+                "\n" +
+                "nextRelation(meta, msg);";
+        initWithScript(jsCode, Sets.newHashSet("one", "two"));
+        TbMsgMetaData metaData = new TbMsgMetaData();
+        metaData.putValue("temp", "10");
+        metaData.putValue("humidity", "99");
+        String rawJson = "{\"name\": \"Vit\", \"passed\": 5}";
+
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, rawJson.getBytes());
+        mockJsExecutor();
+
+        node.onMsg(ctx, msg);
+        verify(ctx).getJsExecutor();
+        verify(ctx).tellNext(msg, "one");
+    }
+
+    @Test
+    public void unknownRelationThrowsException() throws TbNodeException {
+        String jsCode = "function nextRelation(meta, msg) {\n" +
+                "    return 'nine';" +
+                "};\n" +
+                "\n" +
+                "nextRelation(meta, msg);";
+        initWithScript(jsCode, Sets.newHashSet("one", "two"));
+        TbMsgMetaData metaData = new TbMsgMetaData();
+        metaData.putValue("temp", "10");
+        metaData.putValue("humidity", "99");
+        String rawJson = "{\"name\": \"Vit\", \"passed\": 5}";
+
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", null, metaData, rawJson.getBytes());
+        mockJsExecutor();
+
+        node.onMsg(ctx, msg);
+        verify(ctx).getJsExecutor();
+        verifyError(msg, "Unsupported relation for switch nine", IllegalStateException.class);
+    }
+
+    private void initWithScript(String script, Set<String> relations) throws TbNodeException {
+        TbJsSwitchNodeConfiguration config = new TbJsSwitchNodeConfiguration();
+        config.setJsScript(script);
+        config.setAllowedRelations(relations);
+        ObjectMapper mapper = new ObjectMapper();
+        TbNodeConfiguration nodeConfiguration = new TbNodeConfiguration();
+        nodeConfiguration.setData(mapper.valueToTree(config));
+
+        node = new TbJsSwitchNode();
+        node.init(nodeConfiguration, null);
+    }
+
+    private void mockJsExecutor() {
+        when(ctx.getJsExecutor()).thenReturn(executor);
+        doAnswer((Answer<ListenableFuture<String>>) invocationOnMock -> {
+            try {
+                Callable task = (Callable) (invocationOnMock.getArguments())[0];
+                return Futures.immediateFuture((String) task.call());
+            } catch (Throwable th) {
+                return Futures.immediateFailedFuture(th);
+            }
+        }).when(executor).executeAsync(Matchers.any(Callable.class));
+    }
+
+    private void verifyError(TbMsg msg, String message, Class expectedClass) {
+        ArgumentCaptor<Throwable> captor = ArgumentCaptor.forClass(Throwable.class);
+        verify(ctx).tellError(same(msg), captor.capture());
+
+        Throwable value = captor.getValue();
+        assertEquals(expectedClass, value.getClass());
+        assertEquals(message, value.getMessage());
+    }
+}
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