add Log and Alarm nodes

@@ -24,6 +24,7 @@ import org.thingsboard.rule.engine.api.ScriptEngine;
 import org.thingsboard.rule.engine.api.TbContext;
 import org.thingsboard.server.actors.ActorSystemContext;
 import org.thingsboard.server.common.data.id.RuleNodeId;
+import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.rule.RuleNode;
 import org.thingsboard.server.common.msg.TbMsg;
 import org.thingsboard.server.common.msg.cluster.ServerAddress;
@@ -120,6 +121,11 @@ class DefaultTbContext implements TbContext {
     }
 
     @Override
+    public TenantId getTenantId() {
+        return nodeCtx.getTenantId();
+    }
+
+    @Override
     public void tellNext(TbMsg msg, Set<String> relationTypes) {
         relationTypes.forEach(type -> tellNext(msg, type));
     }

@@ -146,6 +146,17 @@ public class NashornJsEngine implements org.thingsboard.rule.engine.api.ScriptEn
     }
 
     @Override
+    public JsonNode executeJson(TbMsg msg) throws ScriptException {
+        return executeScript(msg);
+    }
+
+    @Override
+    public String executeToString(TbMsg msg) throws ScriptException {
+        JsonNode result = executeScript(msg);
+        return result.asText();
+    }
+
+    @Override
     public boolean executeFilter(TbMsg msg) throws ScriptException {
         JsonNode result = executeScript(msg);
         if (!result.isBoolean()) {

@@ -15,6 +15,7 @@
  */
 package org.thingsboard.rule.engine.api;
 
+import com.fasterxml.jackson.databind.JsonNode;
 import org.thingsboard.server.common.msg.TbMsg;
 
 import javax.script.ScriptException;
@@ -30,6 +31,10 @@ public interface ScriptEngine {
 
     Set<String> executeSwitch(TbMsg msg) throws ScriptException;
 
+    JsonNode executeJson(TbMsg msg) throws ScriptException;
+
+    String executeToString(TbMsg msg) throws ScriptException;
+
     void destroy();
 
 }

@@ -16,6 +16,7 @@
 package org.thingsboard.rule.engine.api;
 
 import org.thingsboard.server.common.data.id.RuleNodeId;
+import org.thingsboard.server.common.data.id.TenantId;
 import org.thingsboard.server.common.data.rule.RuleNode;
 import org.thingsboard.server.common.msg.TbMsg;
 import org.thingsboard.server.common.msg.cluster.ServerAddress;
@@ -59,6 +60,8 @@ public interface TbContext {
 
     RuleNodeId getSelfId();
 
+    TenantId getTenantId();
+
     AttributesService getAttributesService();
 
     CustomerService getCustomerService();

+/**
+ * Copyright © 2016-2018 The Thingsboard Authors
+ *
+ * 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.
+ */
+package org.thingsboard.rule.engine.action;
+
+import com.datastax.driver.core.utils.UUIDs;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.base.Function;
+import com.google.common.util.concurrent.AsyncFunction;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+import lombok.extern.slf4j.Slf4j;
+import org.thingsboard.rule.engine.TbNodeUtils;
+import org.thingsboard.rule.engine.api.*;
+import org.thingsboard.server.common.data.alarm.Alarm;
+import org.thingsboard.server.common.data.alarm.AlarmStatus;
+import org.thingsboard.server.common.data.id.TenantId;
+import org.thingsboard.server.common.data.plugin.ComponentType;
+import org.thingsboard.server.common.msg.TbMsg;
+import org.thingsboard.server.common.msg.TbMsgMetaData;
+
+import static org.thingsboard.rule.engine.DonAsynchron.withCallback;
+
+@Slf4j
+@RuleNode(
+        type = ComponentType.ACTION,
+        name = "alarm", relationTypes = {"Created", "Updated", "Cleared", "False"},
+        configClazz = TbAlarmNodeConfiguration.class,
+        nodeDescription = "Create/Update/Clear Alarm",
+        nodeDetails = "isAlarm - JS function that verifies if Alarm should be CREATED for incoming message.\n" +
+                "isCleared - JS function that verifies if Alarm should be CLEARED for incoming message.\n" +
+                "Details - JS function that creates JSON object based on incoming message. This object will be added into Alarm.details field.\n" +
+                "Node output:\n" +
+                "If alarm was not created, original message is returned. Otherwise new Message returned with type 'ALARM', Alarm object in 'msg' property and 'matadata' will contains one of those properties 'isNewAlarm/isExistingAlarm/isClearedAlarm' " +
+                "Message payload can be accessed via <code>msg</code> property. For example <code>'temperature = ' + msg.temperature ;</code>" +
+                "Message metadata can be accessed via <code>metadata</code> property. For example <code>'name = ' + metadata.customerName;</code>",
+        uiResources = {"static/rulenode/rulenode-core-config.js"})
+
+public class TbAlarmNode implements TbNode {
+
+    static final String IS_NEW_ALARM = "isNewAlarm";
+    static final String IS_EXISTING_ALARM = "isExistingAlarm";
+    static final String IS_CLEARED_ALARM = "isClearedAlarm";
+
+    private final ObjectMapper mapper = new ObjectMapper();
+
+    private TbAlarmNodeConfiguration config;
+    private ScriptEngine createJsEngine;
+    private ScriptEngine clearJsEngine;
+    private ScriptEngine buildDetailsJsEngine;
+
+    @Override
+    public void init(TbContext ctx, TbNodeConfiguration configuration) throws TbNodeException {
+        this.config = TbNodeUtils.convert(configuration, TbAlarmNodeConfiguration.class);
+        this.createJsEngine = ctx.createJsScriptEngine(config.getCreateConditionJs(), "isAlarm");
+        this.clearJsEngine = ctx.createJsScriptEngine(config.getClearConditionJs(), "isCleared");
+        this.buildDetailsJsEngine = ctx.createJsScriptEngine(config.getAlarmDetailsBuildJs(), "Details");
+    }
+
+    @Override
+    public void onMsg(TbContext ctx, TbMsg msg) {
+        ListeningExecutor jsExecutor = ctx.getJsExecutor();
+
+        ListenableFuture<Boolean> shouldCreate = jsExecutor.executeAsync(() -> createJsEngine.executeFilter(msg));
+        ListenableFuture<AlarmResult> transform = Futures.transform(shouldCreate, (AsyncFunction<Boolean, AlarmResult>) create -> {
+            if (create) {
+                return createOrUpdate(ctx, msg);
+            } else {
+                return checkForClearIfExist(ctx, msg);
+            }
+        });
+
+        withCallback(transform,
+                alarmResult -> {
+                    if (alarmResult.alarm == null) {
+                        ctx.tellNext(msg, "False");
+                    } else if (alarmResult.isCreated) {
+                        ctx.tellNext(toAlarmMsg(alarmResult, msg), "Created");
+                    } else if (alarmResult.isUpdated) {
+                        ctx.tellNext(toAlarmMsg(alarmResult, msg), "Updated");
+                    } else if (alarmResult.isCleared) {
+                        ctx.tellNext(toAlarmMsg(alarmResult, msg), "Cleared");
+                    }
+                },
+                t -> ctx.tellError(msg, t));
+
+    }
+
+    private ListenableFuture<AlarmResult> createOrUpdate(TbContext ctx, TbMsg msg) {
+        ListenableFuture<Alarm> latest = ctx.getAlarmService().findLatestByOriginatorAndType(ctx.getTenantId(), msg.getOriginator(), config.getAlarmType());
+        return Futures.transform(latest, (AsyncFunction<Alarm, AlarmResult>) a -> {
+            if (a == null || a.getStatus().isCleared()) {
+                return createNewAlarm(ctx, msg);
+            } else {
+                return updateAlarm(ctx, msg, a);
+            }
+        });
+    }
+
+    private ListenableFuture<AlarmResult> checkForClearIfExist(TbContext ctx, TbMsg msg) {
+        ListenableFuture<Alarm> latest = ctx.getAlarmService().findLatestByOriginatorAndType(ctx.getTenantId(), msg.getOriginator(), config.getAlarmType());
+        return Futures.transform(latest, (AsyncFunction<Alarm, AlarmResult>) a -> {
+            if (a != null && !a.getStatus().isCleared()) {
+                return clearAlarm(ctx, msg, a);
+            }
+            return Futures.immediateFuture(new AlarmResult(false, false, false, null));
+        });
+    }
+
+    private ListenableFuture<AlarmResult> createNewAlarm(TbContext ctx, TbMsg msg) {
+        ListenableFuture<Alarm> asyncAlarm = Futures.transform(buildAlarmDetails(ctx, msg), (Function<JsonNode, Alarm>) details -> buildAlarm(msg, details, ctx.getTenantId()));
+        ListenableFuture<Alarm> asyncCreated = Futures.transform(asyncAlarm, (Function<Alarm, Alarm>) alarm -> ctx.getAlarmService().createOrUpdateAlarm(alarm));
+        return Futures.transform(asyncCreated, (Function<Alarm, AlarmResult>) alarm -> new AlarmResult(true, false, false, alarm));
+    }
+
+    private ListenableFuture<AlarmResult> updateAlarm(TbContext ctx, TbMsg msg, Alarm alarm) {
+        ListenableFuture<Alarm> asyncUpdated = Futures.transform(buildAlarmDetails(ctx, msg), (Function<JsonNode, Alarm>) details -> {
+            alarm.setSeverity(config.getSeverity());
+            alarm.setPropagate(config.isPropagate());
+            alarm.setDetails(details);
+            alarm.setEndTs(System.currentTimeMillis());
+            return ctx.getAlarmService().createOrUpdateAlarm(alarm);
+        });
+
+        return Futures.transform(asyncUpdated, (Function<Alarm, AlarmResult>) a -> new AlarmResult(false, true, false, a));
+    }
+
+    private ListenableFuture<AlarmResult> clearAlarm(TbContext ctx, TbMsg msg, Alarm alarm) {
+        ListenableFuture<Boolean> shouldClear = ctx.getJsExecutor().executeAsync(() -> clearJsEngine.executeFilter(msg));
+        return Futures.transform(shouldClear, (AsyncFunction<Boolean, AlarmResult>) clear -> {
+            if (clear) {
+                ListenableFuture<Boolean> clearFuture = ctx.getAlarmService().clearAlarm(alarm.getId(), System.currentTimeMillis());
+                return Futures.transform(clearFuture, (Function<Boolean, AlarmResult>) cleared -> {
+                    alarm.setStatus(alarm.getStatus().isAck() ? AlarmStatus.CLEARED_ACK : AlarmStatus.CLEARED_UNACK);
+                    return new AlarmResult(false, false, true, alarm);
+                });
+            }
+            return Futures.immediateFuture(new AlarmResult(false, false, false, null));
+        });
+    }
+
+    private Alarm buildAlarm(TbMsg msg, JsonNode details, TenantId tenantId) {
+        return Alarm.builder()
+                .tenantId(tenantId)
+                .originator(msg.getOriginator())
+                .status(AlarmStatus.ACTIVE_UNACK)
+                .severity(config.getSeverity())
+                .propagate(config.isPropagate())
+                .type(config.getAlarmType())
+                //todo-vp: alarm date should be taken from Message or current Time should be used?
+//                .startTs(System.currentTimeMillis())
+//                .endTs(System.currentTimeMillis())
+                .details(details)
+                .build();
+    }
+
+    private ListenableFuture<JsonNode> buildAlarmDetails(TbContext ctx, TbMsg msg) {
+        return ctx.getJsExecutor().executeAsync(() -> buildDetailsJsEngine.executeJson(msg));
+    }
+
+    private TbMsg toAlarmMsg(AlarmResult alarmResult, TbMsg originalMsg) {
+        JsonNode jsonNodes = mapper.valueToTree(alarmResult.alarm);
+        String data = jsonNodes.toString();
+        TbMsgMetaData metaData = originalMsg.getMetaData().copy();
+        if (alarmResult.isCreated) {
+            metaData.putValue(IS_NEW_ALARM, Boolean.TRUE.toString());
+        } else if (alarmResult.isUpdated) {
+            metaData.putValue(IS_EXISTING_ALARM, Boolean.TRUE.toString());
+        } else if (alarmResult.isCleared) {
+            metaData.putValue(IS_CLEARED_ALARM, Boolean.TRUE.toString());
+        }
+        return new TbMsg(UUIDs.timeBased(), "ALARM", originalMsg.getOriginator(), metaData, data);
+    }
+
+
+    @Override
+    public void destroy() {
+        if (createJsEngine != null) {
+            createJsEngine.destroy();
+        }
+        if (clearJsEngine != null) {
+            clearJsEngine.destroy();
+        }
+        if (buildDetailsJsEngine != null) {
+            buildDetailsJsEngine.destroy();
+        }
+    }
+
+    private static class AlarmResult {
+        boolean isCreated;
+        boolean isUpdated;
+        boolean isCleared;
+        Alarm alarm;
+
+        AlarmResult(boolean isCreated, boolean isUpdated, boolean isCleared, Alarm alarm) {
+            this.isCreated = isCreated;
+            this.isUpdated = isUpdated;
+            this.isCleared = isCleared;
+            this.alarm = alarm;
+        }
+    }
+}

+/**
+ * Copyright © 2016-2018 The Thingsboard Authors
+ *
+ * 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.
+ */
+package org.thingsboard.rule.engine.action;
+
+import lombok.Data;
+import org.thingsboard.rule.engine.api.NodeConfiguration;
+import org.thingsboard.server.common.data.alarm.AlarmSeverity;
+
+@Data
+public class TbAlarmNodeConfiguration implements NodeConfiguration {
+
+    private String createConditionJs;
+    private String clearConditionJs;
+    private String alarmDetailsBuildJs;
+    private String alarmType;
+    private AlarmSeverity severity;
+    private boolean propagate;
+
+
+    @Override
+    public TbAlarmNodeConfiguration defaultConfiguration() {
+        TbAlarmNodeConfiguration configuration = new TbAlarmNodeConfiguration();
+        configuration.setCreateConditionJs("return 'incoming message = ' + msg + meta;");
+        configuration.setClearConditionJs("return 'incoming message = ' + msg + meta;");
+        configuration.setAlarmDetailsBuildJs("return 'incoming message = ' + msg + meta;");
+        configuration.setAlarmType("General Alarm");
+        configuration.setSeverity(AlarmSeverity.CRITICAL);
+        configuration.setPropagate(false);
+        return configuration;
+    }
+}

+/**
+ * Copyright © 2016-2018 The Thingsboard Authors
+ *
+ * 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.
+ */
+package org.thingsboard.rule.engine.action;
+
+import lombok.extern.slf4j.Slf4j;
+import org.thingsboard.rule.engine.TbNodeUtils;
+import org.thingsboard.rule.engine.api.*;
+import org.thingsboard.server.common.data.plugin.ComponentType;
+import org.thingsboard.server.common.msg.TbMsg;
+
+import static org.thingsboard.rule.engine.DonAsynchron.withCallback;
+
+@Slf4j
+@RuleNode(
+        type = ComponentType.ACTION,
+        name = "log",
+        configClazz = TbLogNodeConfiguration.class,
+        nodeDescription = "Log incoming messages using JS script for transformation Message into String",
+        nodeDetails = "Transform incoming Message with configured JS condition to String and log final value. " +
+                "Message payload can be accessed via <code>msg</code> property. For example <code>'temperature = ' + msg.temperature ;</code>" +
+                "Message metadata can be accessed via <code>metadata</code> property. For example <code>'name = ' + metadata.customerName;</code>")
+
+public class TbLogNode implements TbNode {
+
+    private TbLogNodeConfiguration config;
+    private ScriptEngine jsEngine;
+
+    @Override
+    public void init(TbContext ctx, TbNodeConfiguration configuration) throws TbNodeException {
+        this.config = TbNodeUtils.convert(configuration, TbLogNodeConfiguration.class);
+        this.jsEngine = ctx.createJsScriptEngine(config.getJsScript(), "ToString");
+    }
+
+    @Override
+    public void onMsg(TbContext ctx, TbMsg msg) {
+        ListeningExecutor jsExecutor = ctx.getJsExecutor();
+        withCallback(jsExecutor.executeAsync(() -> jsEngine.executeToString(msg)),
+                toString -> {
+                    log.info(toString);
+                    ctx.tellNext(msg);
+                },
+                t -> ctx.tellError(msg, t));
+    }
+
+    @Override
+    public void destroy() {
+        if (jsEngine != null) {
+            jsEngine.destroy();
+        }
+    }
+}

+/**
+ * Copyright © 2016-2018 The Thingsboard Authors
+ *
+ * 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.
+ */
+package org.thingsboard.rule.engine.action;
+
+import lombok.Data;
+import org.thingsboard.rule.engine.api.NodeConfiguration;
+
+@Data
+public class TbLogNodeConfiguration implements NodeConfiguration {
+
+    private String jsScript;
+
+    @Override
+    public TbLogNodeConfiguration defaultConfiguration() {
+        TbLogNodeConfiguration configuration = new TbLogNodeConfiguration();
+        configuration.setJsScript("return 'incoming message = ' + msg + meta;");
+        return configuration;
+    }
+}

+/**
+ * Copyright © 2016-2018 The Thingsboard Authors
+ *
+ * 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.
+ */
+package org.thingsboard.rule.engine.action;
+
+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.apache.commons.lang3.NotImplementedException;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.runners.MockitoJUnitRunner;
+import org.mockito.stubbing.Answer;
+import org.thingsboard.rule.engine.api.*;
+import org.thingsboard.server.common.data.alarm.Alarm;
+import org.thingsboard.server.common.data.id.DeviceId;
+import org.thingsboard.server.common.data.id.EntityId;
+import org.thingsboard.server.common.data.id.TenantId;
+import org.thingsboard.server.common.msg.TbMsg;
+import org.thingsboard.server.common.msg.TbMsgMetaData;
+import org.thingsboard.server.dao.alarm.AlarmService;
+
+import javax.script.ScriptException;
+import java.io.IOException;
+import java.util.concurrent.Callable;
+
+import static org.junit.Assert.*;
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.*;
+import static org.thingsboard.rule.engine.action.TbAlarmNode.*;
+import static org.thingsboard.server.common.data.alarm.AlarmSeverity.CRITICAL;
+import static org.thingsboard.server.common.data.alarm.AlarmSeverity.WARNING;
+import static org.thingsboard.server.common.data.alarm.AlarmStatus.*;
+
+@RunWith(MockitoJUnitRunner.class)
+public class TbAlarmNodeTest {
+
+    private TbAlarmNode node;
+
+    @Mock
+    private TbContext ctx;
+    @Mock
+    private ListeningExecutor executor;
+    @Mock
+    private AlarmService alarmService;
+
+    @Mock
+    private ScriptEngine createJs;
+    @Mock
+    private ScriptEngine clearJs;
+    @Mock
+    private ScriptEngine detailsJs;
+
+    private EntityId originator = new DeviceId(UUIDs.timeBased());
+    private TenantId tenantId = new TenantId(UUIDs.timeBased());
+    private TbMsgMetaData metaData = new TbMsgMetaData();
+    private String rawJson = "{\"name\": \"Vit\", \"passed\": 5}";
+
+    @Test
+    public void newAlarmCanBeCreated() throws ScriptException, IOException {
+        initWithScript();
+        metaData.putValue("key", "value");
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", originator, metaData, rawJson);
+
+        when(createJs.executeFilter(msg)).thenReturn(true);
+        when(detailsJs.executeJson(msg)).thenReturn(null);
+        when(alarmService.findLatestByOriginatorAndType(tenantId, originator, "SomeType")).thenReturn(Futures.immediateFuture(null));
+
+        doAnswer((Answer<Alarm>) invocationOnMock -> (Alarm) (invocationOnMock.getArguments())[0]).when(alarmService).createOrUpdateAlarm(any(Alarm.class));
+
+        node.onMsg(ctx, msg);
+
+        ArgumentCaptor<TbMsg> captor = ArgumentCaptor.forClass(TbMsg.class);
+        verify(ctx).tellNext(captor.capture(), eq("Created"));
+        TbMsg actualMsg = captor.getValue();
+
+        assertEquals("ALARM", actualMsg.getType());
+        assertEquals(originator, actualMsg.getOriginator());
+        assertEquals("value", actualMsg.getMetaData().getValue("key"));
+        assertEquals(Boolean.TRUE.toString(), actualMsg.getMetaData().getValue(IS_NEW_ALARM));
+        assertNotSame(metaData, actualMsg.getMetaData());
+
+        Alarm actualAlarm = new ObjectMapper().readValue(actualMsg.getData().getBytes(), Alarm.class);
+        Alarm expectedAlarm = Alarm.builder()
+                .tenantId(tenantId)
+                .originator(originator)
+                .status(ACTIVE_UNACK)
+                .severity(CRITICAL)
+                .propagate(true)
+                .type("SomeType")
+                .details(null)
+                .build();
+
+        assertEquals(expectedAlarm, actualAlarm);
+
+        verify(executor, times(2)).executeAsync(any(Callable.class));
+    }
+
+    @Test
+    public void shouldCreateScriptThrowsException() throws ScriptException {
+        initWithScript();
+        metaData.putValue("key", "value");
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", originator, metaData, rawJson);
+
+        when(createJs.executeFilter(msg)).thenThrow(new NotImplementedException("message"));
+
+        node.onMsg(ctx, msg);
+
+        verifyError(msg, "message", NotImplementedException.class);
+
+
+        verify(ctx).createJsScriptEngine("CREATE", "isAlarm");
+        verify(ctx).createJsScriptEngine("CLEAR", "isCleared");
+        verify(ctx).createJsScriptEngine("DETAILS", "Details");
+        verify(ctx).getJsExecutor();
+
+        verifyNoMoreInteractions(ctx, alarmService, clearJs, detailsJs);
+    }
+
+    @Test
+    public void buildDetailsThrowsException() throws ScriptException, IOException {
+        initWithScript();
+        metaData.putValue("key", "value");
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", originator, metaData, rawJson);
+
+        when(createJs.executeFilter(msg)).thenReturn(true);
+        when(detailsJs.executeJson(msg)).thenThrow(new NotImplementedException("message"));
+        when(alarmService.findLatestByOriginatorAndType(tenantId, originator, "SomeType")).thenReturn(Futures.immediateFuture(null));
+
+        node.onMsg(ctx, msg);
+
+        verifyError(msg, "message", NotImplementedException.class);
+
+        verify(ctx).createJsScriptEngine("CREATE", "isAlarm");
+        verify(ctx).createJsScriptEngine("CLEAR", "isCleared");
+        verify(ctx).createJsScriptEngine("DETAILS", "Details");
+        verify(ctx, times(2)).getJsExecutor();
+        verify(ctx).getAlarmService();
+        verify(ctx).getTenantId();
+        verify(alarmService).findLatestByOriginatorAndType(tenantId, originator, "SomeType");
+
+        verifyNoMoreInteractions(ctx, alarmService, clearJs);
+    }
+
+    @Test
+    public void ifAlarmClearedCreateNew() throws ScriptException, IOException {
+        initWithScript();
+        metaData.putValue("key", "value");
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", originator, metaData, rawJson);
+
+        Alarm clearedAlarm = Alarm.builder().status(CLEARED_ACK).build();
+
+        when(createJs.executeFilter(msg)).thenReturn(true);
+        when(detailsJs.executeJson(msg)).thenReturn(null);
+        when(alarmService.findLatestByOriginatorAndType(tenantId, originator, "SomeType")).thenReturn(Futures.immediateFuture(clearedAlarm));
+
+        doAnswer((Answer<Alarm>) invocationOnMock -> (Alarm) (invocationOnMock.getArguments())[0]).when(alarmService).createOrUpdateAlarm(any(Alarm.class));
+
+        node.onMsg(ctx, msg);
+
+        ArgumentCaptor<TbMsg> captor = ArgumentCaptor.forClass(TbMsg.class);
+        verify(ctx).tellNext(captor.capture(), eq("Created"));
+        TbMsg actualMsg = captor.getValue();
+
+        assertEquals("ALARM", actualMsg.getType());
+        assertEquals(originator, actualMsg.getOriginator());
+        assertEquals("value", actualMsg.getMetaData().getValue("key"));
+        assertEquals(Boolean.TRUE.toString(), actualMsg.getMetaData().getValue(IS_NEW_ALARM));
+        assertNotSame(metaData, actualMsg.getMetaData());
+
+        Alarm actualAlarm = new ObjectMapper().readValue(actualMsg.getData().getBytes(), Alarm.class);
+        Alarm expectedAlarm = Alarm.builder()
+                .tenantId(tenantId)
+                .originator(originator)
+                .status(ACTIVE_UNACK)
+                .severity(CRITICAL)
+                .propagate(true)
+                .type("SomeType")
+                .details(null)
+                .build();
+
+        assertEquals(expectedAlarm, actualAlarm);
+
+        verify(executor, times(2)).executeAsync(any(Callable.class));
+    }
+
+    @Test
+    public void alarmCanBeUpdated() throws ScriptException, IOException {
+        initWithScript();
+        metaData.putValue("key", "value");
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", originator, metaData, rawJson);
+
+        long oldEndDate = System.currentTimeMillis();
+        Alarm activeAlarm = Alarm.builder().type("SomeType").tenantId(tenantId).originator(originator).status(ACTIVE_UNACK).severity(WARNING).endTs(oldEndDate).build();
+
+        when(createJs.executeFilter(msg)).thenReturn(true);
+        when(clearJs.executeFilter(msg)).thenReturn(false);
+        when(detailsJs.executeJson(msg)).thenReturn(null);
+        when(alarmService.findLatestByOriginatorAndType(tenantId, originator, "SomeType")).thenReturn(Futures.immediateFuture(activeAlarm));
+
+        doAnswer((Answer<Alarm>) invocationOnMock -> (Alarm) (invocationOnMock.getArguments())[0]).when(alarmService).createOrUpdateAlarm(activeAlarm);
+
+        node.onMsg(ctx, msg);
+
+        ArgumentCaptor<TbMsg> captor = ArgumentCaptor.forClass(TbMsg.class);
+        verify(ctx).tellNext(captor.capture(), eq("Updated"));
+        TbMsg actualMsg = captor.getValue();
+
+        assertEquals("ALARM", actualMsg.getType());
+        assertEquals(originator, actualMsg.getOriginator());
+        assertEquals("value", actualMsg.getMetaData().getValue("key"));
+        assertEquals(Boolean.TRUE.toString(), actualMsg.getMetaData().getValue(IS_EXISTING_ALARM));
+        assertNotSame(metaData, actualMsg.getMetaData());
+
+        Alarm actualAlarm = new ObjectMapper().readValue(actualMsg.getData().getBytes(), Alarm.class);
+        assertTrue(activeAlarm.getEndTs() > oldEndDate);
+        Alarm expectedAlarm = Alarm.builder()
+                .tenantId(tenantId)
+                .originator(originator)
+                .status(ACTIVE_UNACK)
+                .severity(CRITICAL)
+                .propagate(true)
+                .type("SomeType")
+                .details(null)
+                .endTs(activeAlarm.getEndTs())
+                .build();
+
+        assertEquals(expectedAlarm, actualAlarm);
+
+        verify(executor, times(2)).executeAsync(any(Callable.class));
+    }
+
+    @Test
+    public void alarmCanBeCleared() throws ScriptException, IOException {
+        initWithScript();
+        metaData.putValue("key", "value");
+        TbMsg msg = new TbMsg(UUIDs.timeBased(), "USER", originator, metaData, rawJson);
+
+        long oldEndDate = System.currentTimeMillis();
+        Alarm activeAlarm = Alarm.builder().type("SomeType").tenantId(tenantId).originator(originator).status(ACTIVE_UNACK).severity(WARNING).endTs(oldEndDate).build();
+
+        when(createJs.executeFilter(msg)).thenReturn(false);
+        when(clearJs.executeFilter(msg)).thenReturn(true);
+//        when(detailsJs.executeJson(msg)).thenReturn(null);
+        when(alarmService.findLatestByOriginatorAndType(tenantId, originator, "SomeType")).thenReturn(Futures.immediateFuture(activeAlarm));
+        when(alarmService.clearAlarm(eq(activeAlarm.getId()), anyLong())).thenReturn(Futures.immediateFuture(true));
+//        doAnswer((Answer<Alarm>) invocationOnMock -> (Alarm) (invocationOnMock.getArguments())[0]).when(alarmService).createOrUpdateAlarm(activeAlarm);
+
+        node.onMsg(ctx, msg);
+
+        ArgumentCaptor<TbMsg> captor = ArgumentCaptor.forClass(TbMsg.class);
+        verify(ctx).tellNext(captor.capture(), eq("Cleared"));
+        TbMsg actualMsg = captor.getValue();
+
+        assertEquals("ALARM", actualMsg.getType());
+        assertEquals(originator, actualMsg.getOriginator());
+        assertEquals("value", actualMsg.getMetaData().getValue("key"));
+        assertEquals(Boolean.TRUE.toString(), actualMsg.getMetaData().getValue(IS_CLEARED_ALARM));
+        assertNotSame(metaData, actualMsg.getMetaData());
+
+        Alarm actualAlarm = new ObjectMapper().readValue(actualMsg.getData().getBytes(), Alarm.class);
+        Alarm expectedAlarm = Alarm.builder()
+                .tenantId(tenantId)
+                .originator(originator)
+                .status(CLEARED_UNACK)
+                .severity(WARNING)
+                .propagate(false)
+                .type("SomeType")
+                .details(null)
+                .endTs(oldEndDate)
+                .build();
+
+        assertEquals(expectedAlarm, actualAlarm);
+    }
+
+    private void initWithScript() {
+        try {
+            TbAlarmNodeConfiguration config = new TbAlarmNodeConfiguration();
+            config.setPropagate(true);
+            config.setSeverity(CRITICAL);
+            config.setAlarmType("SomeType");
+            config.setCreateConditionJs("CREATE");
+            config.setClearConditionJs("CLEAR");
+            config.setAlarmDetailsBuildJs("DETAILS");
+            ObjectMapper mapper = new ObjectMapper();
+            TbNodeConfiguration nodeConfiguration = new TbNodeConfiguration(mapper.valueToTree(config));
+
+            when(ctx.createJsScriptEngine("CREATE", "isAlarm")).thenReturn(createJs);
+            when(ctx.createJsScriptEngine("CLEAR", "isCleared")).thenReturn(clearJs);
+            when(ctx.createJsScriptEngine("DETAILS", "Details")).thenReturn(detailsJs);
+
+            when(ctx.getTenantId()).thenReturn(tenantId);
+            when(ctx.getJsExecutor()).thenReturn(executor);
+            when(ctx.getAlarmService()).thenReturn(alarmService);
+
+            mockJsExecutor();
+
+            node = new TbAlarmNode();
+            node.init(ctx, nodeConfiguration);
+        } catch (TbNodeException ex) {
+            throw new IllegalStateException(ex);
+        }
+    }
+
+    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(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