Improve email Rule Nodes configuration.

rule-engine/rule-engine-components/pom.xml

@@ -72,16 +72,6 @@
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
         </dependency>
-        <dependency>
-            <groupId>org.apache.velocity</groupId>
-            <artifactId>velocity</artifactId>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.velocity</groupId>
-            <artifactId>velocity-tools</artifactId>
-            <scope>provided</scope>
-        </dependency>
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-web</artifactId>

rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mail/RuleVelocityUtils.java

@@ -1,68 +0,0 @@
-/**
- * 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.mail;
-
-import com.fasterxml.jackson.databind.ObjectMapper;
-import org.apache.velocity.Template;
-import org.apache.velocity.VelocityContext;
-import org.apache.velocity.runtime.RuntimeServices;
-import org.apache.velocity.runtime.RuntimeSingleton;
-import org.apache.velocity.runtime.parser.ParseException;
-import org.apache.velocity.runtime.parser.node.SimpleNode;
-import org.thingsboard.server.common.msg.TbMsg;
-
-import java.io.IOException;
-import java.io.StringReader;
-import java.io.StringWriter;
-import java.util.Map;
-
-import static org.thingsboard.server.common.msg.TbMsgDataType.JSON;
-
-public class RuleVelocityUtils {
-
-    public static VelocityContext createContext(TbMsg msg) throws IOException {
-        VelocityContext context = new VelocityContext();
-        context.put("originator", msg.getOriginator());
-        context.put("type", msg.getType());
-        context.put("metadata", msg.getMetaData().values());
-        if (msg.getDataType() == JSON) {
-            Map map = new ObjectMapper().readValue(msg.getData(), Map.class);
-            context.put("msg", map);
-        } else {
-            context.put("msg", msg.getData());
-        }
-        return context;
-    }
-
-    public static String merge(Template template, VelocityContext context) {
-        StringWriter writer = new StringWriter();
-        template.merge(context, writer);
-        return writer.toString();
-    }
-
-    public static Template create(String source, String templateName) throws ParseException {
-        RuntimeServices runtimeServices = RuntimeSingleton.getRuntimeServices();
-        StringReader reader = new StringReader(source);
-        SimpleNode node = runtimeServices.parse(reader, templateName);
-        Template template = new Template();
-        template.setRuntimeServices(runtimeServices);
-        template.setData(node);
-        template.initDocument();
-        return template;
-    }
-
-
-}

rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mail/TbMsgToEmailNode.java

@@ -18,17 +18,14 @@ package org.thingsboard.rule.engine.mail;
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import lombok.extern.slf4j.Slf4j;
-import org.apache.velocity.Template;
-import org.apache.velocity.VelocityContext;
-import org.apache.velocity.runtime.parser.ParseException;
 import org.springframework.util.StringUtils;
 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 org.thingsboard.server.common.msg.TbMsgMetaData;
 
 import java.io.IOException;
-import java.util.Optional;
 
 import static org.thingsboard.rule.engine.mail.TbSendEmailNode.SEND_EMAIL_TYPE;
 
@@ -48,27 +45,9 @@ public class TbMsgToEmailNode implements TbNode {
 
     private TbMsgToEmailNodeConfiguration config;
 
-    private Optional<Template> fromTemplate;
-    private Optional<Template> toTemplate;
-    private Optional<Template> ccTemplate;
-    private Optional<Template> bccTemplate;
-    private Optional<Template> subjectTemplate;
-    private Optional<Template> bodyTemplate;
-
     @Override
     public void init(TbContext ctx, TbNodeConfiguration configuration) throws TbNodeException {
         this.config = TbNodeUtils.convert(configuration, TbMsgToEmailNodeConfiguration.class);
-        try {
-            fromTemplate = toTemplate(config.getFromTemplate(), "From Template");
-            toTemplate = toTemplate(config.getToTemplate(), "To Template");
-            ccTemplate = toTemplate(config.getCcTemplate(), "Cc Template");
-            bccTemplate = toTemplate(config.getBccTemplate(), "Bcc Template");
-            subjectTemplate = toTemplate(config.getSubjectTemplate(), "Subject Template");
-            bodyTemplate = toTemplate(config.getBodyTemplate(), "Body Template");
-        } catch (ParseException e) {
-            log.error("Failed to create templates based on provided configuration!", e);
-            throw new TbNodeException(e);
-        }
     }
 
     @Override
@@ -90,21 +69,20 @@ public class TbMsgToEmailNode implements TbNode {
 
     private EmailPojo convert(TbMsg msg) throws IOException {
         EmailPojo.EmailPojoBuilder builder = EmailPojo.builder();
-        VelocityContext context = RuleVelocityUtils.createContext(msg);
-        fromTemplate.ifPresent(t -> builder.from(RuleVelocityUtils.merge(t, context)));
-        toTemplate.ifPresent(t -> builder.to(RuleVelocityUtils.merge(t, context)));
-        ccTemplate.ifPresent(t -> builder.cc(RuleVelocityUtils.merge(t, context)));
-        bccTemplate.ifPresent(t -> builder.bcc(RuleVelocityUtils.merge(t, context)));
-        subjectTemplate.ifPresent(t -> builder.subject(RuleVelocityUtils.merge(t, context)));
-        bodyTemplate.ifPresent(t -> builder.body(RuleVelocityUtils.merge(t, context)));
+        builder.from(fromTemplate(this.config.getFromTemplate(), msg.getMetaData()));
+        builder.to(fromTemplate(this.config.getToTemplate(), msg.getMetaData()));
+        builder.cc(fromTemplate(this.config.getCcTemplate(), msg.getMetaData()));
+        builder.bcc(fromTemplate(this.config.getBccTemplate(), msg.getMetaData()));
+        builder.subject(fromTemplate(this.config.getSubjectTemplate(), msg.getMetaData()));
+        builder.body(fromTemplate(this.config.getBodyTemplate(), msg.getMetaData()));
         return builder.build();
     }
 
-    private Optional<Template> toTemplate(String source, String name) throws ParseException {
-        if (!StringUtils.isEmpty(source)) {
-            return Optional.of(RuleVelocityUtils.create(source, name));
+    private String fromTemplate(String template, TbMsgMetaData metaData) {
+        if (!StringUtils.isEmpty(template)) {
+            return TbNodeUtils.processPattern(template, metaData);
         } else {
-            return Optional.empty();
+            return null;
         }
     }
 

rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mail/TbMsgToEmailNodeConfiguration.java

@@ -32,10 +32,9 @@ public class TbMsgToEmailNodeConfiguration implements NodeConfiguration {
     public TbMsgToEmailNodeConfiguration defaultConfiguration() {
         TbMsgToEmailNodeConfiguration configuration = new TbMsgToEmailNodeConfiguration();
         configuration.fromTemplate = "info@testmail.org";
-        configuration.toTemplate = "$metadata.userEmail";
-        configuration.subjectTemplate = "Device $deviceType temperature high";
-        configuration.bodyTemplate = "Device $metadata.deviceName has high temperature $msg.temp";
-
+        configuration.toTemplate = "${userEmail}";
+        configuration.subjectTemplate = "Device ${deviceType} temperature high";
+        configuration.bodyTemplate = "Device ${deviceName} has high temperature ${temp}";
         return configuration;
     }
 }

rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mail/TbSendEmailNode.java

@@ -15,15 +15,21 @@
  */
 package org.thingsboard.rule.engine.mail;
 
+import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.util.concurrent.ListenableFuture;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.StringUtils;
+import org.springframework.mail.javamail.JavaMailSenderImpl;
+import org.springframework.mail.javamail.MimeMessageHelper;
 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 javax.mail.internet.MimeMessage;
 import java.io.IOException;
+import java.util.Properties;
 
 import static org.thingsboard.rule.engine.DonAsynchron.withCallback;
 
@@ -35,17 +41,29 @@ import static org.thingsboard.rule.engine.DonAsynchron.withCallback;
         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>")
+                "Message metadata can be accessed via <code>metadata</code> property. For example <code>'name = ' + metadata.customerName;</code>",
+        uiResources = {"static/rulenode/rulenode-core-config.js"},
+        configDirective = "tbActionNodeSendEmailConfig"
+)
 public class TbSendEmailNode implements TbNode {
 
+    private static final String MAIL_PROP = "mail.";
     static final String SEND_EMAIL_TYPE = "SEND_EMAIL";
     private static final ObjectMapper MAPPER = new ObjectMapper();
 
     private TbSendEmailNodeConfiguration config;
+    private JavaMailSenderImpl mailSender;
 
     @Override
     public void init(TbContext ctx, TbNodeConfiguration configuration) throws TbNodeException {
-        this.config = TbNodeUtils.convert(configuration, TbSendEmailNodeConfiguration.class);
+        try {
+            this.config = TbNodeUtils.convert(configuration, TbSendEmailNodeConfiguration.class);
+            if (!this.config.isUseSystemSmtpSettings()) {
+                mailSender = createMailSender();
+            }
+        } catch (Exception e) {
+            throw new TbNodeException(e);
+        }
     }
 
     @Override
@@ -54,8 +72,7 @@ public class TbSendEmailNode implements TbNode {
             validateType(msg.getType());
             EmailPojo email = getEmail(msg);
             withCallback(ctx.getMailExecutor().executeAsync(() -> {
-                        ctx.getMailService().send(email.getFrom(), email.getTo(), email.getCc(),
-                                email.getBcc(), email.getSubject(), email.getBody());
+                        sendEmail(ctx, email);
                         return null;
                     }),
                     ok -> ctx.tellNext(msg),
@@ -65,6 +82,27 @@ public class TbSendEmailNode implements TbNode {
         }
     }
 
+    private void sendEmail(TbContext ctx, EmailPojo email) throws Exception {
+        if (this.config.isUseSystemSmtpSettings()) {
+            ctx.getMailService().send(email.getFrom(), email.getTo(), email.getCc(),
+                    email.getBcc(), email.getSubject(), email.getBody());
+        } else {
+            MimeMessage mailMsg = mailSender.createMimeMessage();
+            MimeMessageHelper helper = new MimeMessageHelper(mailMsg, "UTF-8");
+            helper.setFrom(email.getFrom());
+            helper.setTo(email.getTo().split("\\s*,\\s*"));
+            if (!StringUtils.isBlank(email.getCc())) {
+                helper.setCc(email.getCc().split("\\s*,\\s*"));
+            }
+            if (!StringUtils.isBlank(email.getBcc())) {
+                helper.setBcc(email.getBcc().split("\\s*,\\s*"));
+            }
+            helper.setSubject(email.getSubject());
+            helper.setText(email.getBody());
+            mailSender.send(helper.getMimeMessage());
+        }
+    }
+
     private EmailPojo getEmail(TbMsg msg) throws IOException {
         EmailPojo email = MAPPER.readValue(msg.getData(), EmailPojo.class);
         if (StringUtils.isBlank(email.getTo())) {
@@ -83,4 +121,26 @@ public class TbSendEmailNode implements TbNode {
     @Override
     public void destroy() {
     }
+
+    private JavaMailSenderImpl createMailSender() {
+        JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
+        mailSender.setHost(this.config.getSmtpHost());
+        mailSender.setPort(this.config.getSmtpPort());
+        mailSender.setUsername(this.config.getUsername());
+        mailSender.setPassword(this.config.getPassword());
+        mailSender.setJavaMailProperties(createJavaMailProperties());
+        return mailSender;
+    }
+
+    private Properties createJavaMailProperties() {
+        Properties javaMailProperties = new Properties();
+        String protocol = this.config.getSmtpProtocol();
+        javaMailProperties.put("mail.transport.protocol", protocol);
+        javaMailProperties.put(MAIL_PROP + protocol + ".host", this.config.getSmtpHost());
+        javaMailProperties.put(MAIL_PROP + protocol + ".port", this.config.getSmtpPort()+"");
+        javaMailProperties.put(MAIL_PROP + protocol + ".timeout", this.config.getTimeout()+"");
+        javaMailProperties.put(MAIL_PROP + protocol + ".auth", String.valueOf(StringUtils.isNotEmpty(this.config.getUsername())));
+        javaMailProperties.put(MAIL_PROP + protocol + ".starttls.enable", Boolean.valueOf(this.config.isEnableTls()).toString());
+        return javaMailProperties;
+    }
 }

rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mail/TbSendEmailNodeConfiguration.java

@@ -21,12 +21,24 @@ import org.thingsboard.rule.engine.api.NodeConfiguration;
 @Data
 public class TbSendEmailNodeConfiguration implements NodeConfiguration {
 
-    private String tmp;
+    private boolean useSystemSmtpSettings;
+    private String smtpHost;
+    private int smtpPort;
+    private String username;
+    private String password;
+    private String smtpProtocol;
+    private int timeout;
+    private boolean enableTls;
 
     @Override
     public TbSendEmailNodeConfiguration defaultConfiguration() {
         TbSendEmailNodeConfiguration configuration = new TbSendEmailNodeConfiguration();
-        configuration.tmp = "";
+        configuration.setUseSystemSmtpSettings(true);
+        configuration.setSmtpHost("localhost");
+        configuration.setSmtpProtocol("smtp");
+        configuration.setSmtpPort(25);
+        configuration.setTimeout(10000);
+        configuration.setEnableTls(false);
         return configuration;
     }
 }