thingsboard-memoizeit

diff --git a/pom.xml b/pom.xml
index dc58627..67d48b2 100755
--- a/pom.xml
+++ b/pom.xml
@@ -79,6 +79,7 @@
         <dbunit.version>2.5.3</dbunit.version>
         <spring-test-dbunit.version>1.2.1</spring-test-dbunit.version>
         <postgresql.driver.version>9.4.1211</postgresql.driver.version>
+        <netty-mqtt-client.version>2.0.0TB</netty-mqtt-client.version>
         <sonar.exclusions>org/thingsboard/server/gen/**/*,
             org/thingsboard/server/extensions/core/plugin/telemetry/gen/**/*
         </sonar.exclusions>
@@ -819,6 +820,11 @@
                 <scope>provided</scope>
             </dependency>
             <dependency>
+                <groupId>nl.jk5.netty-mqtt</groupId>
+                <artifactId>netty-mqtt</artifactId>
+                <version>${netty-mqtt-client.version}</version>
+            </dependency>
+            <dependency>
                 <groupId>org.elasticsearch.client</groupId>
                 <artifactId>rest</artifactId>
                 <version>${elasticsearch.version}</version>

diff --git a/rule-engine/rule-engine-components/pom.xml b/rule-engine/rule-engine-components/pom.xml
index 4a51c8c..a38df28 100644
--- a/rule-engine/rule-engine-components/pom.xml
+++ b/rule-engine/rule-engine-components/pom.xml
@@ -101,6 +101,14 @@
             <artifactId>amqp-client</artifactId>
         </dependency>
         <dependency>
+            <groupId>nl.jk5.netty-mqtt</groupId>
+            <artifactId>netty-mqtt</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.bouncycastle</groupId>
+            <artifactId>bcpkix-jdk15on</artifactId>
+        </dependency>
+        <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
             <version>${junit.version}</version>

diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/aws/sqs/TbSqsNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/aws/sqs/TbSqsNode.java
index 42c7e4e..f5172c7 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/aws/sqs/TbSqsNode.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/aws/sqs/TbSqsNode.java
@@ -13,17 +13,12 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package org.thingsboard.rule.engine.aws.sqs;
 
 import com.amazonaws.auth.AWSCredentials;
 import com.amazonaws.auth.AWSStaticCredentialsProvider;
 import com.amazonaws.auth.BasicAWSCredentials;
-import com.amazonaws.regions.Region;
-import com.amazonaws.regions.Regions;
-import com.amazonaws.services.sns.AmazonSNS;
-import com.amazonaws.services.sns.AmazonSNSClient;
-import com.amazonaws.services.sns.model.PublishRequest;
-import com.amazonaws.services.sns.model.PublishResult;
 import com.amazonaws.services.sqs.AmazonSQS;
 import com.amazonaws.services.sqs.AmazonSQSClientBuilder;
 import com.amazonaws.services.sqs.model.MessageAttributeValue;

diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/credentials/AnonymousCredentials.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/credentials/AnonymousCredentials.java
new file mode 100644
index 0000000..9d5e8df
--- /dev/null
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/credentials/AnonymousCredentials.java
@@ -0,0 +1,36 @@
+/**
+ * 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.mqtt.credentials;
+
+import io.netty.handler.ssl.SslContext;
+import nl.jk5.mqtt.MqttClientConfig;
+
+import java.util.Optional;
+
+public class AnonymousCredentials implements MqttClientCredentials {
+
+    @Override
+    public Optional<SslContext> initSslContext() {
+        return Optional.empty();
+    }
+
+    @Override
+    public void configure(MqttClientConfig config) {
+
+    }
+}
+

diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/credentials/BasicCredentials.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/credentials/BasicCredentials.java
new file mode 100644
index 0000000..cbbd703
--- /dev/null
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/credentials/BasicCredentials.java
@@ -0,0 +1,43 @@
+/**
+ * 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.mqtt.credentials;
+
+import io.netty.handler.ssl.SslContext;
+import lombok.Data;
+import nl.jk5.mqtt.MqttClientConfig;
+
+import java.util.Optional;
+
+@Data
+public class BasicCredentials implements MqttClientCredentials {
+
+    private String username;
+    private String password;
+
+    @Override
+    public Optional<SslContext> initSslContext() {
+        return Optional.empty();
+    }
+
+    @Override
+    public void configure(MqttClientConfig config) {
+        config.setUsername(username);
+        config.setPassword(password);
+    }
+
+}
+

diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/credentials/CertPemClientCredentials.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/credentials/CertPemClientCredentials.java
new file mode 100644
index 0000000..c9fb4a3
--- /dev/null
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/credentials/CertPemClientCredentials.java
@@ -0,0 +1,154 @@
+/**
+ * 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.mqtt.credentials;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import io.netty.handler.ssl.ClientAuth;
+import io.netty.handler.ssl.SslContext;
+import io.netty.handler.ssl.SslContextBuilder;
+import lombok.Data;
+import lombok.extern.slf4j.Slf4j;
+import nl.jk5.mqtt.MqttClientConfig;
+import org.apache.commons.codec.binary.Base64;
+import org.bouncycastle.jce.provider.BouncyCastleProvider;
+import org.bouncycastle.openssl.PEMDecryptorProvider;
+import org.bouncycastle.openssl.PEMEncryptedKeyPair;
+import org.bouncycastle.openssl.PEMKeyPair;
+import org.bouncycastle.openssl.jcajce.JcaPEMKeyConverter;
+import org.bouncycastle.openssl.jcajce.JcePEMDecryptorProviderBuilder;
+import org.springframework.util.StringUtils;
+
+import javax.net.ssl.KeyManagerFactory;
+import javax.net.ssl.TrustManagerFactory;
+import java.io.ByteArrayInputStream;
+import java.security.*;
+import java.security.cert.Certificate;
+import java.security.cert.CertificateFactory;
+import java.security.cert.X509Certificate;
+import java.security.interfaces.RSAPrivateKey;
+import java.security.spec.PKCS8EncodedKeySpec;
+import java.util.Optional;
+
+@Data
+@Slf4j
+@JsonIgnoreProperties(ignoreUnknown = true)
+public class CertPemClientCredentials implements MqttClientCredentials {
+
+    private static final String TLS_VERSION = "TLSv1.2";
+
+    private String caCert;
+    private String cert;
+    private String privateKey;
+    private String password;
+
+    @Override
+    public Optional<SslContext> initSslContext() {
+        try {
+            Security.addProvider(new BouncyCastleProvider());
+            return Optional.of(SslContextBuilder.forClient()
+                    .keyManager(createAndInitKeyManagerFactory())
+                    .trustManager(createAndInitTrustManagerFactory())
+                    .clientAuth(ClientAuth.REQUIRE)
+                    .build());
+        } catch (Exception e) {
+            log.error("[{}:{}] Creating TLS factory failed!", caCert, cert, e);
+            throw new RuntimeException("Creating TLS factory failed!", e);
+        }
+    }
+
+    @Override
+    public void configure(MqttClientConfig config) {
+
+    }
+
+    private KeyManagerFactory createAndInitKeyManagerFactory() throws Exception {
+        X509Certificate certHolder = readCertFile(cert);
+        Object keyObject = readPrivateKeyFile(privateKey);
+        char[] passwordCharArray = "".toCharArray();
+        if (!StringUtils.isEmpty(password)) {
+            passwordCharArray = password.toCharArray();
+        }
+
+        JcaPEMKeyConverter keyConverter = new JcaPEMKeyConverter().setProvider("BC");
+
+        PrivateKey privateKey;
+        if (keyObject instanceof PEMEncryptedKeyPair) {
+            PEMDecryptorProvider provider = new JcePEMDecryptorProviderBuilder().build(passwordCharArray);
+            KeyPair key = keyConverter.getKeyPair(((PEMEncryptedKeyPair) keyObject).decryptKeyPair(provider));
+            privateKey = key.getPrivate();
+        } else if (keyObject instanceof PEMKeyPair) {
+            KeyPair key = keyConverter.getKeyPair((PEMKeyPair) keyObject);
+            privateKey = key.getPrivate();
+        } else if (keyObject instanceof PrivateKey) {
+            privateKey = (PrivateKey)keyObject;
+        } else {
+            throw new RuntimeException("Unable to get private key from object: " + keyObject.getClass());
+        }
+
+        KeyStore clientKeyStore = KeyStore.getInstance(KeyStore.getDefaultType());
+        clientKeyStore.load(null, null);
+        clientKeyStore.setCertificateEntry("cert", certHolder);
+        clientKeyStore.setKeyEntry("private-key",
+                privateKey,
+                passwordCharArray,
+                new Certificate[]{certHolder});
+
+        KeyManagerFactory keyManagerFactory = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
+        keyManagerFactory.init(clientKeyStore, passwordCharArray);
+        return keyManagerFactory;
+    }
+
+    private TrustManagerFactory createAndInitTrustManagerFactory() throws Exception {
+        X509Certificate caCertHolder;
+        caCertHolder = readCertFile(caCert);
+
+        KeyStore caKeyStore = KeyStore.getInstance(KeyStore.getDefaultType());
+        caKeyStore.load(null, null);
+        caKeyStore.setCertificateEntry("caCert-cert", caCertHolder);
+
+        TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
+        trustManagerFactory.init(caKeyStore);
+        return trustManagerFactory;
+    }
+
+    private X509Certificate readCertFile(String fileContent) throws Exception {
+        X509Certificate certificate = null;
+        if (fileContent != null && !fileContent.trim().isEmpty()) {
+            fileContent = fileContent.replace("-----BEGIN CERTIFICATE-----", "")
+                    .replace("-----END CERTIFICATE-----", "")
+                    .replaceAll("\\s", "");
+            byte[] decoded = Base64.decodeBase64(fileContent);
+            CertificateFactory certFactory = CertificateFactory.getInstance("X.509");
+            certificate = (X509Certificate) certFactory.generateCertificate(new ByteArrayInputStream(decoded));
+        }
+        return certificate;
+    }
+
+    private PrivateKey readPrivateKeyFile(String fileContent) throws Exception {
+        RSAPrivateKey privateKey = null;
+        if (fileContent != null && !fileContent.isEmpty()) {
+            fileContent = fileContent.replaceAll(".*BEGIN.*PRIVATE KEY.*", "")
+                    .replaceAll(".*END.*PRIVATE KEY.*", "")
+                    .replaceAll("\\s", "");
+            byte[] decoded = Base64.decodeBase64(fileContent);
+            KeyFactory keyFactory = KeyFactory.getInstance("RSA");
+            privateKey = (RSAPrivateKey) keyFactory.generatePrivate(new PKCS8EncodedKeySpec(decoded));
+        }
+        return privateKey;
+    }
+
+}

diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/credentials/MqttClientCredentials.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/credentials/MqttClientCredentials.java
new file mode 100644
index 0000000..5c4594f
--- /dev/null
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/credentials/MqttClientCredentials.java
@@ -0,0 +1,40 @@
+/**
+ * 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.mqtt.credentials;
+
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import io.netty.handler.ssl.SslContext;
+import nl.jk5.mqtt.MqttClientConfig;
+
+import java.util.Optional;
+
+@JsonTypeInfo(
+        use = JsonTypeInfo.Id.NAME,
+        include = JsonTypeInfo.As.PROPERTY,
+        property = "type")
+@JsonSubTypes({
+        @JsonSubTypes.Type(value = AnonymousCredentials.class, name = "anonymous"),
+        @JsonSubTypes.Type(value = BasicCredentials.class, name = "basic"),
+        @JsonSubTypes.Type(value = CertPemClientCredentials.class, name = "cert.PEM")})
+public interface MqttClientCredentials {
+
+    Optional<SslContext> initSslContext();
+
+    void configure(MqttClientConfig config);
+}
+

diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/TbMqttNode.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/TbMqttNode.java
new file mode 100644
index 0000000..0ceda9c
--- /dev/null
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/TbMqttNode.java
@@ -0,0 +1,144 @@
+/**
+ * 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.mqtt;
+
+import io.netty.buffer.Unpooled;
+import io.netty.channel.EventLoopGroup;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.handler.codec.mqtt.MqttQoS;
+import io.netty.handler.ssl.SslContext;
+import io.netty.handler.ssl.SslContextBuilder;
+import io.netty.util.concurrent.Future;
+import lombok.extern.slf4j.Slf4j;
+import nl.jk5.mqtt.MqttClient;
+import nl.jk5.mqtt.MqttClientConfig;
+import nl.jk5.mqtt.MqttConnectResult;
+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 javax.net.ssl.SSLException;
+import java.nio.charset.Charset;
+import java.util.Optional;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+@Slf4j
+@RuleNode(
+        type = ComponentType.ACTION,
+        name = "mqtt",
+        configClazz = TbMqttNodeConfiguration.class,
+        nodeDescription = "Publish messages to MQTT broker",
+        nodeDetails = "Expects messages with any message type. Will publish message to MQTT broker.",
+        uiResources = {"static/rulenode/rulenode-core-config.js", "static/rulenode/rulenode-core-config.css"},
+        configDirective = "tbActionNodeMqttConfig"
+)
+public class TbMqttNode implements TbNode {
+
+    private static final Charset UTF8 = Charset.forName("UTF-8");
+
+    private static final String ERROR = "error";
+
+    private TbMqttNodeConfiguration config;
+
+    private EventLoopGroup eventLoopGroup;
+    private MqttClient mqttClient;
+
+    @Override
+    public void init(TbContext ctx, TbNodeConfiguration configuration) throws TbNodeException {
+        try {
+            this.config = TbNodeUtils.convert(configuration, TbMqttNodeConfiguration.class);
+            this.eventLoopGroup = new NioEventLoopGroup();
+            this.mqttClient = initClient();
+        } catch (Exception e) {
+            throw new TbNodeException(e);
+        }
+    }
+
+    @Override
+    public void onMsg(TbContext ctx, TbMsg msg) throws ExecutionException, InterruptedException, TbNodeException {
+        String topic = TbNodeUtils.processPattern(this.config.getTopicPattern(), msg.getMetaData());
+        this.mqttClient.publish(topic, Unpooled.wrappedBuffer(msg.getData().getBytes(UTF8)), MqttQoS.AT_LEAST_ONCE)
+                .addListener(future -> {
+                    if (future.isSuccess()) {
+                        TbMsg next = ctx.transformMsg(msg, msg.getType(), msg.getOriginator(), msg.getMetaData(), msg.getData());
+                        ctx.tellNext(next, TbRelationTypes.SUCCESS);
+                    } else {
+                        TbMsg next = processException(ctx, msg, future.cause());
+                        ctx.tellNext(next, TbRelationTypes.FAILURE, future.cause());
+                    }
+                }
+        );
+    }
+
+    private TbMsg processException(TbContext ctx, TbMsg origMsg, Throwable e) {
+        TbMsgMetaData metaData = origMsg.getMetaData().copy();
+        metaData.putValue(ERROR, e.getClass() + ": " + e.getMessage());
+        return ctx.transformMsg(origMsg, origMsg.getType(), origMsg.getOriginator(), metaData, origMsg.getData());
+    }
+
+    @Override
+    public void destroy() {
+        if (this.mqttClient != null) {
+            this.mqttClient.disconnect();
+        }
+        if (this.eventLoopGroup != null) {
+            this.eventLoopGroup.shutdownGracefully(0, 5, TimeUnit.SECONDS);
+        }
+    }
+
+    private MqttClient initClient() throws Exception {
+        Optional<SslContext> sslContextOpt = initSslContext();
+        MqttClientConfig config = sslContextOpt.isPresent() ? new MqttClientConfig(sslContextOpt.get()) : new MqttClientConfig();
+        if (!StringUtils.isEmpty(this.config.getClientId())) {
+            config.setClientId(this.config.getClientId());
+        }
+        this.config.getCredentials().configure(config);
+        MqttClient client = MqttClient.create(config);
+        client.setEventLoop(this.eventLoopGroup);
+        Future<MqttConnectResult> connectFuture = client.connect(this.config.getHost(), this.config.getPort());
+        MqttConnectResult result;
+        try {
+            result = connectFuture.get(this.config.getConnectTimeoutSec(), TimeUnit.SECONDS);
+        } catch (TimeoutException ex) {
+            connectFuture.cancel(true);
+            client.disconnect();
+            String hostPort = this.config.getHost() + ":" + this.config.getPort();
+            throw new RuntimeException(String.format("Failed to connect to MQTT broker at %s.", hostPort));
+        }
+        if (!result.isSuccess()) {
+            connectFuture.cancel(true);
+            client.disconnect();
+            String hostPort = this.config.getHost() + ":" + this.config.getPort();
+            throw new RuntimeException(String.format("Failed to connect to MQTT broker at %s. Result code is: %s", hostPort, result.getReturnCode()));
+        }
+        return client;
+    }
+
+    private Optional<SslContext> initSslContext() throws SSLException {
+        Optional<SslContext> result = this.config.getCredentials().initSslContext();
+        if (this.config.isSsl() && !result.isPresent()) {
+            result = Optional.of(SslContextBuilder.forClient().build());
+        }
+        return result;
+    }
+
+}

diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/TbMqttNodeConfiguration.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/TbMqttNodeConfiguration.java
new file mode 100644
index 0000000..f63e201
--- /dev/null
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/mqtt/TbMqttNodeConfiguration.java
@@ -0,0 +1,48 @@
+/**
+ * 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.mqtt;
+
+import lombok.Data;
+import org.thingsboard.rule.engine.api.NodeConfiguration;
+import org.thingsboard.rule.engine.mqtt.credentials.AnonymousCredentials;
+import org.thingsboard.rule.engine.mqtt.credentials.MqttClientCredentials;
+
+@Data
+public class TbMqttNodeConfiguration implements NodeConfiguration<TbMqttNodeConfiguration> {
+
+    private String topicPattern;
+    private String host;
+    private int port;
+    private int connectTimeoutSec;
+    private String clientId;
+
+    private boolean ssl;
+    private MqttClientCredentials credentials;
+
+    @Override
+    public TbMqttNodeConfiguration defaultConfiguration() {
+        TbMqttNodeConfiguration configuration = new TbMqttNodeConfiguration();
+        configuration.setTopicPattern("my-topic");
+        configuration.setHost("localhost");
+        configuration.setPort(1883);
+        configuration.setConnectTimeoutSec(10);
+        configuration.setSsl(false);
+        configuration.setCredentials(new AnonymousCredentials());
+        return configuration;
+    }
+
+}