IGNITE-12362 Migrate MQTT module to ignite-extensions - Fixes #17.
Signed-off-by: samaitra <saikat.maitra@gmail.com>
diff --git a/modules/mqtt-ext/README.txt b/modules/mqtt-ext/README.txt
new file mode 100644
index 0000000..b90d301
--- /dev/null
+++ b/modules/mqtt-ext/README.txt
@@ -0,0 +1,29 @@
+Apache Ignite MQTT Module
+-------------------------
+
+Apache Ignite MQTT module provides a streamer to consume MQTT topic messages into
+Apache Ignite caches.
+
+Importing Apache Ignite MQTT Module In Maven Project
+----------------------------------------------------
+
+If you are using Maven to manage dependencies of your project, you can add the MQTT module
+dependency like this (replace '${ignite.version}' with actual Ignite version you are
+interested in):
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+ xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+ xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
+ http://maven.apache.org/xsd/maven-4.0.0.xsd">
+ ...
+ <dependencies>
+ ...
+ <dependency>
+ <groupId>org.apache.ignite</groupId>
+ <artifactId>ignite-mqtt-ext</artifactId>
+ <version>${ignite.version}</version>
+ </dependency>
+ ...
+ </dependencies>
+ ...
+</project>
diff --git a/modules/mqtt-ext/licenses/apache-2.0.txt b/modules/mqtt-ext/licenses/apache-2.0.txt
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/modules/mqtt-ext/licenses/apache-2.0.txt
@@ -0,0 +1,202 @@
+
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diff --git a/modules/mqtt-ext/modules/core/src/test/config/log4j-test.xml b/modules/mqtt-ext/modules/core/src/test/config/log4j-test.xml
new file mode 100755
index 0000000..b78fa9c
--- /dev/null
+++ b/modules/mqtt-ext/modules/core/src/test/config/log4j-test.xml
@@ -0,0 +1,97 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements. See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You 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.
+-->
+
+<!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN"
+ "http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/xml/doc-files/log4j.dtd">
+<!--
+ Log4j configuration.
+-->
+<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/" debug="false">
+ <!--
+ Logs System.out messages to console.
+ -->
+ <appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
+ <!-- Log to STDOUT. -->
+ <param name="Target" value="System.out"/>
+
+ <!-- Log from DEBUG and higher. -->
+ <param name="Threshold" value="DEBUG"/>
+
+ <!-- The default pattern: Date Priority [Category] Message\n -->
+ <layout class="org.apache.log4j.PatternLayout">
+ <param name="ConversionPattern" value="[%d{ISO8601}][%-5p][%t][%c{1}] %m%n"/>
+ </layout>
+
+ <!-- Do not log beyond INFO level. -->
+ <filter class="org.apache.log4j.varia.LevelRangeFilter">
+ <param name="levelMin" value="DEBUG"/>
+ <param name="levelMax" value="INFO"/>
+ </filter>
+ </appender>
+
+ <!--
+ Logs all System.err messages to console.
+ -->
+ <appender name="CONSOLE_ERR" class="org.apache.log4j.ConsoleAppender">
+ <!-- Log to STDERR. -->
+ <param name="Target" value="System.err"/>
+
+ <!-- Log from WARN and higher. -->
+ <param name="Threshold" value="WARN"/>
+
+ <!-- The default pattern: Date Priority [Category] Message\n -->
+ <layout class="org.apache.log4j.PatternLayout">
+ <param name="ConversionPattern" value="[%d{ISO8601}][%-5p][%t][%c{1}] %m%n"/>
+ </layout>
+ </appender>
+
+ <!--
+ Logs all output to specified file.
+ -->
+ <appender name="FILE" class="org.apache.log4j.RollingFileAppender">
+ <param name="Threshold" value="DEBUG"/>
+ <param name="File" value="${IGNITE_HOME}/work/log/ignite.log"/>
+ <param name="Append" value="true"/>
+ <param name="MaxFileSize" value="10MB"/>
+ <param name="MaxBackupIndex" value="10"/>
+ <layout class="org.apache.log4j.PatternLayout">
+ <param name="ConversionPattern" value="[%d{ISO8601}][%-5p][%t][%c{1}] %m%n"/>
+ </layout>
+ </appender>
+
+ <!-- Disable all open source debugging. -->
+ <category name="org">
+ <level value="INFO"/>
+ </category>
+
+ <category name="org.eclipse.jetty">
+ <level value="INFO"/>
+ </category>
+
+ <!-- Default settings. -->
+ <root>
+ <!-- Print at info by default. -->
+ <level value="INFO"/>
+
+ <!-- Append to file and console. -->
+ <appender-ref ref="FILE"/>
+ <appender-ref ref="CONSOLE"/>
+ <appender-ref ref="CONSOLE_ERR"/>
+ </root>
+</log4j:configuration>
diff --git a/modules/mqtt-ext/modules/core/src/test/config/tests.properties b/modules/mqtt-ext/modules/core/src/test/config/tests.properties
new file mode 100644
index 0000000..18b3606
--- /dev/null
+++ b/modules/mqtt-ext/modules/core/src/test/config/tests.properties
@@ -0,0 +1,153 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+#
+
+# Local address to bind to.
+local.ip=127.0.0.1
+
+# TCP communication port
+comm.tcp.port=30010
+
+# JBoss JNDI
+# JBoss context factory for JNDI connection establishing.
+jboss.jndi.context.factory=org.jnp.interfaces.NamingContextFactory
+# JBoss specific parameter for JNDI connection establishing.
+jboss.jndi.pkg.prefixes=org.jboss.naming:org.jnp.interfaces
+# URL of JBoss server for the 1st node.
+jboss.jndi.node1.provider.url=jnp://localhost:1199
+# URL of JBoss server for the 2nd node.
+jboss.jndi.node2.provider.url=jnp://localhost:1299
+# JBoss Discovery test max wait time.
+jboss.disco.test.wait=180000
+
+# Deployment configuration paths.
+# You will either need to override deploy.uri.dir or supply CLASSES_URI as system property.
+#
+# Path to keystore with private and public keys.
+deploy.uri.secure.keystore=@{IGNITE_HOME}/modules/tests/config/securedeploy/keystore
+# Temporary dir where deployment unit stored before deploy.
+deploy.uri.tmpdir=${java.io.tmpdir}/gg
+# Deployment dir for file scanner test with different types of GAR's.
+deploy.uri.file2.path=${java.io.tmpdir}/gg/verification/
+# URI string.
+deploy.uri.file2=file://freq=200@localhost/${java.io.tmpdir}/gg/verification/
+# File scanner URI for local file deployment.
+deploy.uri.file=file://localhost/@{IGNITE_HOME}/modules/extdata/uri/target/file/
+# FTP scanner URI for FTP deployment.
+deploy.uri.ftp=ftp://ftptest:iddqd@94.72.60.102:21/test/deployment
+# Classes scanner URI for classes deployment. Must be overridden for every user.
+deploy.uri.cls=${CLASSES_URI}
+# Http scanner URI for HTTP deployment.
+deploy.uri.http=http://fake.uri
+# Http scanner URI for secure SSL HTTPs deployment.
+deploy.uri.https=https://fake.uri
+# Directory with descriptors to construct GAR files.
+deploy.gar.descriptor.dir=modules/urideploy/src/test/java/org/apache/ignite/spi/deployment/uri/META-INF
+
+# Directory with a number of descriptors for the Ant gar task.
+ant.gar.descriptor.dir=modules/extdata/p2p/META-INF
+# Temporary directory for the Ant task resulting GAR file.
+ant.gar.tmpdir=${java.io.tmpdir}/gg
+# The same as p2p.uri.cls but without protocol
+ant.gar.srcdir=@{IGNITE_HOME}/modules/extdata/uri/target/classes/
+
+# Paths to use in URI deployment SPI tests
+urideployment.jar.uri=modules/extdata/uri/target/deploy/uri.jar
+urideployment.path.tmp=modules/extdata/uri/target/deploy_tmp/
+
+# GAR paths to use in URI deployment SPI tests
+ant.urideployment.gar.uri=file://freq=5000@localhost/EXTDATA/uri/target/deploy
+ant.urideployment.gar.file=modules/extdata/uri/target/deploy/uri.gar
+ant.urideployment.gar.libs-file=modules/extdata/uri/target/deploy2/uri-libs.gar
+ant.urideployment.gar.classes-file=modules/extdata/uri/target/deploy2/uri-classes.gar
+ant.urideployment.gar.path=modules/extdata/uri/target/deploy/
+
+# Classpath directory for GridP2PUserVersionChangeSelfTest
+ant.userversion.class.dir=@{IGNITE_HOME}/modules/tests/java/
+
+# Multicast discovery self test.
+discovery.mbeanserver.selftest.baseport=50000
+
+# TCP communication self test.
+comm.mbeanserver.selftest.baseport=50100
+
+# Kernel tests.
+grid.comm.selftest.sender.timeout=1000
+grid.comm.selftest.timeout=10000
+
+#P2P tests
+#Overwrite this property. It should point to P2P module compilation directory.
+p2p.uri.cls=file://localhost/@{IGNITE_HOME}/modules/extdata/p2p/target/classes/
+p2p.uri.cls.second=file://localhost/@{IGNITE_HOME}/modules/extdata/uri/target/classes/
+
+# AOP tests.
+# Connector port for RMI.
+connector.rmi.port=7657
+# Connector port for XFire Web Service.
+connector.ws.port=9090
+
+# Load test duration in minutes.
+load.test.duration=500
+load.test.threadnum=50
+load.test.nodenum=5
+
+# Loaders tests
+loader.self.test.config=modules/core/src/test/config/loaders/grid-cfg.xml
+loader.self.multipletest.config=modules/core/src/test/config/loaders/grid-cfg-2-grids.xml
+loader.self.test.jboss.config=modules/core/src/test/config/loaders/grid-cfg.xml
+
+# WebSphere jmx properties
+websphere.jmx.connector.host=localhost
+websphere.jmx.connector.port=8880
+websphere.jmx.connector.security=false
+websphere.jmx.username=
+websphere.jmx.pwd=
+
+# GlassFish jmx properties for GlassFish Loader
+glassfish.jmx.rmi.connector.port=8686
+glassfish.jmx.username=admin
+glassfish.jmx.password=adminadmin
+
+# Tomcat jmx properties for Servlet Loader
+tomcat.jmx.rmi.connector.port=1097
+
+# Marshaller for tests
+#marshaller.class=org.apache.ignite.marshaller.jdk.GridJdkMarshaller
+
+# EC2 configuration for tests
+#amazon.access.key=
+#amazon.secret.key=
+
+# SSH config.
+ssh.username=uname
+ssh.password=passwd
+
+# SSL tests keystore.
+ssl.keystore.path=@{IGNITE_HOME}/modules/clients/src/test/keystore/server.jks
+ssl.keystore.password=123456
+
+# node01 signed with trust-one, node02 and node03 by trust-two, node02old is expired
+# trust-both contains both CAs
+ssl.keystore.node01.path=@{IGNITE_HOME}/modules/clients/src/test/keystore/ca/node01.jks
+ssl.keystore.node02.path=@{IGNITE_HOME}/modules/clients/src/test/keystore/ca/node02.jks
+ssl.keystore.node03.path=@{IGNITE_HOME}/modules/clients/src/test/keystore/ca/node03.jks
+ssl.keystore.trustone.path=@{IGNITE_HOME}/modules/clients/src/test/keystore/ca/trust-one.jks
+ssl.keystore.trusttwo.path=@{IGNITE_HOME}/modules/clients/src/test/keystore/ca/trust-two.jks
+ssl.keystore.trustboth.path=@{IGNITE_HOME}/modules/clients/src/test/keystore/ca/trust-both.jks
+ssl.keystore.node02old.path=@{IGNITE_HOME}/modules/clients/src/test/keystore/ca/node02old.jks
+
+# Hadoop home directory.
+hadoop.home=@{HADOOP_HOME}
diff --git a/modules/mqtt-ext/pom.xml b/modules/mqtt-ext/pom.xml
new file mode 100644
index 0000000..3490312
--- /dev/null
+++ b/modules/mqtt-ext/pom.xml
@@ -0,0 +1,123 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+ Licensed to the Apache Software Foundation (ASF) under one or more
+ contributor license agreements. See the NOTICE file distributed with
+ this work for additional information regarding copyright ownership.
+ The ASF licenses this file to You 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.
+-->
+
+<!--
+ POM file.
+-->
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+ <modelVersion>4.0.0</modelVersion>
+
+ <parent>
+ <groupId>org.apache.ignite</groupId>
+ <artifactId>ignite-extensions-parent</artifactId>
+ <version>1</version>
+ <relativePath>../../parent</relativePath>
+ </parent>
+
+ <artifactId>ignite-mqtt-ext</artifactId>
+ <version>1.0.0-SNAPSHOT</version>
+ <url>http://ignite.apache.org</url>
+
+ <dependencies>
+ <dependency>
+ <groupId>org.apache.ignite</groupId>
+ <artifactId>ignite-core</artifactId>
+ <version>${ignite.version}</version>
+ </dependency>
+
+ <dependency>
+ <groupId>org.eclipse.paho</groupId>
+ <artifactId>org.eclipse.paho.client.mqttv3</artifactId>
+ <version>${paho.version}</version>
+ </dependency>
+
+ <dependency>
+ <groupId>com.github.rholder</groupId>
+ <artifactId>guava-retrying</artifactId>
+ <version>${guava.retrying.version}</version>
+ </dependency>
+
+ <dependency>
+ <groupId>com.google.guava</groupId>
+ <artifactId>guava</artifactId>
+ <version>${guava.version}</version>
+ </dependency>
+
+ <dependency>
+ <groupId>org.apache.activemq</groupId>
+ <artifactId>activemq-broker</artifactId>
+ <version>${activemq.version}</version>
+ <scope>test</scope>
+ </dependency>
+
+ <dependency>
+ <groupId>org.apache.activemq</groupId>
+ <artifactId>activemq-mqtt</artifactId>
+ <version>${activemq.version}</version>
+ <scope>test</scope>
+ </dependency>
+
+ <dependency>
+ <groupId>org.apache.ignite</groupId>
+ <artifactId>ignite-log4j</artifactId>
+ <version>${ignite.version}</version>
+ <scope>test</scope>
+ </dependency>
+
+ <dependency>
+ <groupId>org.apache.ignite</groupId>
+ <artifactId>ignite-spring</artifactId>
+ <version>${ignite.version}</version>
+ <scope>test</scope>
+ </dependency>
+
+ <dependency>
+ <groupId>org.apache.ignite</groupId>
+ <artifactId>ignite-core</artifactId>
+ <version>${ignite.version}</version>
+ <type>test-jar</type>
+ <scope>test</scope>
+ </dependency>
+ </dependencies>
+
+ <!-- Repository for Mosquette (embedded MQTT broker for tests) and for Eclipse Paho (MQTT client) -->
+ <repositories>
+ <repository>
+ <id>Eclipse Paho Repo</id>
+ <url>https://repo.eclipse.org/content/repositories/paho-releases/</url>
+ <releases>
+ <enabled>true</enabled>
+ </releases>
+ <snapshots>
+ <enabled>false</enabled>
+ </snapshots>
+ </repository>
+ </repositories>
+
+ <build>
+ <plugins>
+ <!-- Generate the OSGi MANIFEST.MF for this bundle. -->
+ <plugin>
+ <groupId>org.apache.felix</groupId>
+ <artifactId>maven-bundle-plugin</artifactId>
+ </plugin>
+ </plugins>
+ </build>
+
+</project>
diff --git a/modules/mqtt-ext/src/main/java/org/apache/ignite/stream/mqtt/MqttStreamer.java b/modules/mqtt-ext/src/main/java/org/apache/ignite/stream/mqtt/MqttStreamer.java
new file mode 100644
index 0000000..1ae59be
--- /dev/null
+++ b/modules/mqtt-ext/src/main/java/org/apache/ignite/stream/mqtt/MqttStreamer.java
@@ -0,0 +1,709 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.apache.ignite.stream.mqtt;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+
+import org.apache.ignite.IgniteDataStreamer;
+import org.apache.ignite.IgniteException;
+import org.apache.ignite.IgniteLogger;
+import org.apache.ignite.internal.util.typedef.internal.A;
+import org.apache.ignite.stream.StreamAdapter;
+import org.apache.ignite.stream.StreamMultipleTupleExtractor;
+import org.apache.ignite.stream.StreamSingleTupleExtractor;
+
+import com.github.rholder.retry.Retryer;
+import com.github.rholder.retry.RetryerBuilder;
+import com.github.rholder.retry.StopStrategies;
+import com.github.rholder.retry.StopStrategy;
+import com.github.rholder.retry.WaitStrategies;
+import com.github.rholder.retry.WaitStrategy;
+import com.google.common.base.Joiner;
+import com.google.common.base.Predicate;
+import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
+import org.eclipse.paho.client.mqttv3.MqttCallback;
+import org.eclipse.paho.client.mqttv3.MqttClient;
+import org.eclipse.paho.client.mqttv3.MqttClientPersistence;
+import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
+import org.eclipse.paho.client.mqttv3.MqttMessage;
+
+/**
+ * Streamer that consumes from a MQTT topic and feeds key-value pairs into an {@link IgniteDataStreamer} instance,
+ * using Eclipse Paho as an MQTT client.
+ * <p>
+ * You must also provide a {@link StreamSingleTupleExtractor} or a {@link StreamMultipleTupleExtractor} to extract
+ * cache tuples out of the incoming message.
+ * <p>
+ * This Streamer has many features:
+ *
+ * <ul>
+ * <li>Subscribing to a single topic or multiple topics at once.</li>
+ * <li>Specifying the subscriber's QoS for a single topic or for multiple topics.</li>
+ * <li>Allows setting {@link MqttConnectOptions} to support features like last will testament, persistent
+ * sessions, etc.</li>
+ * <li>Specifying the client ID. A random one will be generated and maintained throughout reconnections if the user
+ * does not provide one.</li>
+ * <li>(Re-)Connection retries based on the <i>guava-retrying</i> library. Retry wait and retry stop policies
+ * can be configured.</li>
+ * <li>Blocking the start() method until connected for the first time.</li>
+ * </ul>
+ *
+ * Note: features like durable subscriptions, last will testament, etc. can be configured via the
+ * {@link #setConnectOptions(MqttConnectOptions)} setter.
+ *
+ * @see <a href="https://github.com/rholder/guava-retrying">guava-retrying library</a>
+ */
+public class MqttStreamer<K, V> extends StreamAdapter<MqttMessage, K, V> implements MqttCallback {
+ /** Logger. */
+ private IgniteLogger log;
+
+ /** The MQTT client object for internal use. */
+ private MqttClient client;
+
+ /** The broker URL, set by the user. */
+ private String brokerUrl;
+
+ /** The topic to subscribe to, if a single topic. */
+ private String topic;
+
+ /** The quality of service to use for a single topic subscription (optional). */
+ private Integer qualityOfService;
+
+ /** The topics to subscribe to, if many. */
+ private List<String> topics;
+
+ /**
+ * The qualities of service to use for multiple topic subscriptions. If specified, it must contain the same
+ * number of elements as {@link #topics}.
+ */
+ private List<Integer> qualitiesOfService;
+
+ /** The MQTT client ID (optional). */
+ private String clientId;
+
+ /** A configurable persistence mechanism. If not set, Paho will use its default. */
+ private MqttClientPersistence persistence;
+
+ /** The MQTT client connect options, where users can configured the last will and testament, durability, etc. */
+ private MqttConnectOptions connectOptions;
+
+ /** Quiesce timeout on disconnection. */
+ private Integer disconnectQuiesceTimeout;
+
+ /** Whether to disconnect forcibly or not. */
+ private boolean disconnectForcibly;
+
+ /** If disconnecting forcibly, the timeout. */
+ private Integer disconnectForciblyTimeout;
+
+ /**
+ * The strategy to determine how long to wait between retry attempts. By default, this streamer uses a
+ * Fibonacci-based strategy.
+ */
+ private WaitStrategy retryWaitStrategy = WaitStrategies.fibonacciWait();
+
+ /** The strategy to determine when to stop retrying to (re-)connect. By default, we never stop. */
+ private StopStrategy retryStopStrategy = StopStrategies.neverStop();
+
+ /** The internal connection retrier object with a thread pool of size 1. */
+ private MqttConnectionRetrier connectionRetrier;
+
+ /** Whether to block the start() method until connected for the first time. */
+ private boolean blockUntilConnected;
+
+ /** State keeping. */
+ private volatile boolean stopped = true;
+
+ /** Cached log prefix for cache messages. */
+ private String cachedLogValues;
+
+ /**
+ * Starts streamer.
+ *
+ * @throws IgniteException If failed.
+ */
+ public void start() throws IgniteException {
+ if (!stopped)
+ throw new IgniteException("Attempted to start an already started MQTT Streamer");
+
+ // For simplicity, if these are null initialize to empty lists.
+ topics = topics == null ? new ArrayList<String>() : topics;
+
+ qualitiesOfService = qualitiesOfService == null ? new ArrayList<Integer>() : qualitiesOfService;
+
+ try {
+ Map<String, Object> logValues = new HashMap<>();
+
+ // Parameter validations.
+ A.notNull(getStreamer(), "streamer");
+ A.notNull(getIgnite(), "ignite");
+ A.ensure(!(getSingleTupleExtractor() == null && getMultipleTupleExtractor() == null),
+ "tuple extractor missing");
+ A.ensure(getSingleTupleExtractor() == null || getMultipleTupleExtractor() == null,
+ "cannot provide both single and multiple tuple extractor");
+ A.notNullOrEmpty(brokerUrl, "broker URL");
+
+ // If the client ID is empty, generate one.
+ if (clientId == null || clientId.length() == 0)
+ clientId = MqttClient.generateClientId();
+
+ // If we have both a single topic and a list of topics (but the list of topic is not of
+ // size 1 and == topic, as this would be a case of re-initialization), fail.
+ if (topic != null && topic.length() > 0 && !topics.isEmpty() &&
+ topics.size() != 1 && !topics.get(0).equals(topic))
+ throw new IllegalArgumentException("Cannot specify both a single topic and a list at the same time.");
+
+ // Same as above but for QoS.
+ if (qualityOfService != null && !qualitiesOfService.isEmpty() && qualitiesOfService.size() != 1 &&
+ !qualitiesOfService.get(0).equals(qualityOfService))
+ throw new IllegalArgumentException("Cannot specify both a single QoS and a list at the same time.");
+
+ // Paho API requires disconnect timeout if providing a quiesce timeout and disconnecting forcibly.
+ if (disconnectForcibly && disconnectQuiesceTimeout != null)
+ A.notNull(disconnectForciblyTimeout, "disconnect timeout cannot be null when disconnecting forcibly " +
+ "with quiesce");
+
+ // If we have multiple topics.
+ if (!topics.isEmpty()) {
+ for (String t : topics)
+ A.notNullOrEmpty(t, "topic in list of topics");
+
+ A.ensure(qualitiesOfService.isEmpty() || qualitiesOfService.size() == topics.size(),
+ "qualities of service must be either empty or have the same size as topics list");
+
+ logValues.put("topics", topics);
+ }
+ else {
+ // Just the single topic.
+ topics.add(topic);
+
+ if (qualityOfService != null)
+ qualitiesOfService.add(qualityOfService);
+
+ logValues.put("topic", topic);
+ }
+
+ // Finish building log values.
+ logValues.put("brokerUrl", brokerUrl);
+ logValues.put("clientId", clientId);
+
+ // Cache log values.
+ cachedLogValues = "[" + Joiner.on(", ").withKeyValueSeparator("=").join(logValues) + "]";
+
+ // Create logger.
+ log = getIgnite().log();
+
+ // Create the MQTT client.
+ if (persistence == null)
+ client = new MqttClient(brokerUrl, clientId);
+ else
+ client = new MqttClient(brokerUrl, clientId, persistence);
+
+ // Set this as a callback.
+ client.setCallback(this);
+
+ // Set stopped to false, as the connection will start async.
+ stopped = false;
+
+ // Build retrier.
+ Retryer<Void> retrier = RetryerBuilder.<Void>newBuilder()
+ .retryIfResult(new Predicate<Void>() {
+ @Override public boolean apply(Void v) {
+ return !client.isConnected() && !stopped;
+ }
+ })
+ .retryIfException().retryIfRuntimeException()
+ .withWaitStrategy(retryWaitStrategy)
+ .withStopStrategy(retryStopStrategy)
+ .build();
+
+ // Create the connection retrier.
+ connectionRetrier = new MqttConnectionRetrier(retrier);
+
+ if (log.isInfoEnabled())
+ log.info("Starting MQTT Streamer " + cachedLogValues);
+
+ // Connect.
+ connectionRetrier.connect();
+ }
+ catch (Exception e) {
+ throw new IgniteException("Failed to initialize MQTT Streamer.", e);
+ }
+ }
+
+ /**
+ * Stops streamer.
+ *
+ * @throws IgniteException If failed.
+ */
+ public void stop() throws IgniteException {
+ if (stopped)
+ throw new IgniteException("Failed to stop MQTT Streamer (already stopped).");
+
+ // Stop the retrier.
+ connectionRetrier.stop();
+
+ try {
+ if (disconnectForcibly) {
+ if (disconnectQuiesceTimeout == null && disconnectForciblyTimeout == null)
+ client.disconnectForcibly();
+
+ else if (disconnectForciblyTimeout != null && disconnectQuiesceTimeout == null)
+ client.disconnectForcibly(disconnectForciblyTimeout);
+
+ else
+ client.disconnectForcibly(disconnectQuiesceTimeout, disconnectForciblyTimeout);
+ }
+ else {
+ if (disconnectQuiesceTimeout == null)
+ client.disconnect();
+
+ else
+ client.disconnect(disconnectQuiesceTimeout);
+ }
+
+ client.close();
+
+ stopped = true;
+ }
+ catch (Exception e) {
+ throw new IgniteException("Failed to stop Exception while stopping MQTT Streamer.", e);
+ }
+ }
+
+ // -------------------------------
+ // MQTT Client callback methods
+ // -------------------------------
+
+ /**
+ * Implements the {@link MqttCallback#connectionLost(Throwable)} callback method for the MQTT client to inform the
+ * streamer that the connection has been lost.
+ *
+ * {@inheritDoc}
+ */
+ @Override public void connectionLost(Throwable throwable) {
+ // If we have been stopped, we do not try to establish the connection again.
+ if (stopped)
+ return;
+
+ log.warning(String.format("MQTT Connection to broker was lost [brokerUrl=%s, type=%s, err=%s]", brokerUrl,
+ throwable.getClass(), throwable.getMessage()));
+
+ connectionRetrier.connect();
+ }
+
+ /**
+ * Implements the {@link MqttCallback#messageArrived(String, MqttMessage)} to receive an MQTT message.
+ *
+ * {@inheritDoc}
+ */
+ @Override public void messageArrived(String topic, MqttMessage message) throws Exception {
+ if (getMultipleTupleExtractor() != null) {
+ Map<K, V> entries = getMultipleTupleExtractor().extract(message);
+
+ if (log.isTraceEnabled())
+ log.trace("Adding cache entries: " + entries);
+
+ getStreamer().addData(entries);
+ }
+ else {
+ Map.Entry<K, V> entry = getSingleTupleExtractor().extract(message);
+
+ if (log.isTraceEnabled())
+ log.trace("Adding cache entry: " + entry);
+
+ getStreamer().addData(entry);
+ }
+ }
+
+ /**
+ * Empty implementation of {@link MqttCallback#deliveryComplete(IMqttDeliveryToken)}.
+ *
+ * Not required by the streamer as it doesn't produce messages.
+ *
+ * {@inheritDoc}
+ */
+ @Override public void deliveryComplete(IMqttDeliveryToken token) {
+ // ignore, as we don't send messages
+ }
+
+ // -------------------------------
+ // Getters and setters
+ // -------------------------------
+
+ /**
+ * Sets the broker URL (compulsory).
+ *
+ * @param brokerUrl The Broker URL (compulsory).
+ */
+ public void setBrokerUrl(String brokerUrl) {
+ this.brokerUrl = brokerUrl;
+ }
+
+ /**
+ * Gets the broker URL.
+ *
+ * @return The Broker URL.
+ */
+ public String getBrokerUrl() {
+ return brokerUrl;
+ }
+
+ /**
+ * Sets the topic to subscribe to, if a single topic.
+ *
+ * @param topic The topic to subscribe to.
+ */
+ public void setTopic(String topic) {
+ this.topic = topic;
+ }
+
+ /**
+ * Gets the subscribed topic.
+ *
+ * @return The subscribed topic.
+ */
+ public String getTopic() {
+ return topic;
+ }
+
+ /**
+ * Sets the quality of service to use for a single topic subscription (optional).
+ *
+ * @param qualityOfService The quality of service.
+ */
+ public void setQualityOfService(Integer qualityOfService) {
+ this.qualityOfService = qualityOfService;
+ }
+
+ /**
+ * Gets the quality of service set by the user for a single topic consumption.
+ *
+ * @return The quality of service.
+ */
+ public Integer getQualityOfService() {
+ return qualityOfService;
+ }
+
+ /**
+ * Sets the topics to subscribe to, if many.
+ *
+ * @param topics The topics.
+ */
+ public void setTopics(List<String> topics) {
+ this.topics = topics;
+ }
+
+ /**
+ * Gets the topics subscribed to.
+ *
+ * @return The topics subscribed to.
+ */
+ public List<String> getTopics() {
+ return topics;
+ }
+
+ /**
+ * Sets the qualities of service to use for multiple topic subscriptions. If specified, the list must contain the
+ * same number of elements as {@link #topics}.
+ *
+ * @param qualitiesOfService The qualities of service.
+ */
+ public void setQualitiesOfService(List<Integer> qualitiesOfService) {
+ this.qualitiesOfService = qualitiesOfService;
+ }
+
+ /**
+ * Gets the qualities of service for multiple topics.
+ *
+ * @return The qualities of service.
+ */
+ public List<Integer> getQualitiesOfService() {
+ return qualitiesOfService;
+ }
+
+ /**
+ * Sets the MQTT client ID (optional). If one is not provided, the streamer will generate one and will maintain
+ * it througout any reconnection attempts.
+ *
+ * @param clientId The client ID.
+ */
+ public void setClientId(String clientId) {
+ this.clientId = clientId;
+ }
+
+ /**
+ * Gets the client ID, either the one set by the user or the automatically generated one.
+ *
+ * @return The client ID.
+ */
+ public String getClientId() {
+ return clientId;
+ }
+
+ /**
+ * Gets the currently set persistence mechanism.
+ *
+ * @return The persistence mechanism.
+ */
+ public MqttClientPersistence getPersistence() {
+ return persistence;
+ }
+
+ /**
+ * Sets the persistence mechanism. If not set, Paho will use its default.
+ *
+ * @param persistence A configurable persistence mechanism.
+ */
+ public void setPersistence(MqttClientPersistence persistence) {
+ this.persistence = persistence;
+ }
+
+ /**
+ * Gets the currently used MQTT client connect options.
+ *
+ * @return The MQTT client connect options.
+ */
+ public MqttConnectOptions getConnectOptions() {
+ return connectOptions;
+ }
+
+ /**
+ * Sets the MQTT client connect options, where users can configured the last will and testament, durability, etc.
+ *
+ * @param connectOptions The MQTT client connect options.
+ */
+ public void setConnectOptions(MqttConnectOptions connectOptions) {
+ this.connectOptions = connectOptions;
+ }
+
+ /**
+ * Sets whether to disconnect forcibly or not when shutting down. By default, it's {@code false}.
+ *
+ * @param disconnectForcibly Whether to disconnect forcibly or not. By default, it's {@code false}.
+ */
+ public void setDisconnectForcibly(boolean disconnectForcibly) {
+ this.disconnectForcibly = disconnectForcibly;
+ }
+
+ /**
+ * Gets whether this MQTT client will disconnect forcibly when shutting down.
+ *
+ * @return Whether to disconnect forcibly or not.
+ */
+ public boolean isDisconnectForcibly() {
+ return disconnectForcibly;
+ }
+
+ /**
+ * Sets the quiesce timeout on disconnection. If not provided, this streamer won't use any.
+ *
+ * @param disconnectQuiesceTimeout The disconnect quiesce timeout.
+ */
+ public void setDisconnectQuiesceTimeout(Integer disconnectQuiesceTimeout) {
+ this.disconnectQuiesceTimeout = disconnectQuiesceTimeout;
+ }
+
+ /**
+ * Gets the disconnect quiesce timeout.
+ *
+ * @return The disconnect quiesce timeout.
+ */
+ public Integer getDisconnectQuiesceTimeout() {
+ return disconnectQuiesceTimeout;
+ }
+
+ /**
+ * Sets the timeout if disconnecting forcibly. Compulsory in that case.
+ *
+ * @param disconnectForciblyTimeout The disconnect forcibly timeout.
+ */
+ public void setDisconnectForciblyTimeout(Integer disconnectForciblyTimeout) {
+ this.disconnectForciblyTimeout = disconnectForciblyTimeout;
+ }
+
+ /**
+ * Gets the timeout if disconnecting forcibly.
+ *
+ * @return Timeout.
+ */
+ public Integer getDisconnectForciblyTimeout() {
+ return disconnectForciblyTimeout;
+ }
+
+ /**
+ * Sets the strategy to determine how long to wait between retry attempts. By default, this streamer uses a
+ * Fibonacci-based strategy.
+ *
+ * @param retryWaitStrategy The retry wait strategy.
+ */
+ public void setRetryWaitStrategy(WaitStrategy retryWaitStrategy) {
+ this.retryWaitStrategy = retryWaitStrategy;
+ }
+
+ /**
+ * Gets the retry wait strategy.
+ *
+ * @return The retry wait strategy.
+ */
+ public WaitStrategy getRetryWaitStrategy() {
+ return retryWaitStrategy;
+ }
+
+ /**
+ * Sets the strategy to determine when to stop retrying to (re-)connect. By default, we never stop.
+ *
+ * @param retryStopStrategy The retry stop strategy.
+ */
+ public void setRetryStopStrategy(StopStrategy retryStopStrategy) {
+ this.retryStopStrategy = retryStopStrategy;
+ }
+
+ /**
+ * Gets the retry stop strategy.
+ *
+ * @return The retry stop strategy.
+ */
+ public StopStrategy getRetryStopStrategy() {
+ return retryStopStrategy;
+ }
+
+ /**
+ * Sets whether to block the start() method until connected for the first time. By default, it's {@code false}.
+ *
+ * @param blockUntilConnected Whether to block or not.
+ */
+ public void setBlockUntilConnected(boolean blockUntilConnected) {
+ this.blockUntilConnected = blockUntilConnected;
+ }
+
+ /**
+ * Gets whether to block the start() method until connected for the first time. By default, it's {@code false}.
+ *
+ * @return {@code true} if should connect synchronously in start.
+ */
+ public boolean isBlockUntilConnected() {
+ return blockUntilConnected;
+ }
+
+ /**
+ * Returns whether this streamer is stopped.
+ *
+ * @return {@code true} if stopped; {@code false} if not.
+ */
+ public boolean isStopped() {
+ return stopped;
+ }
+
+ /**
+ * Returns whether this streamer is connected by delegating to the underlying {@link MqttClient#isConnected()}
+ *
+ * @return {@code true} if connected; {@code false} if not.
+ * @see MqttClient#isConnected()
+ */
+ public boolean isConnected() {
+ return client.isConnected();
+ }
+
+ /**
+ * A utility class to help us with (re-)connecting to the MQTT broker. It uses a single-threaded executor to perform
+ * the (re-)connections.
+ */
+ private class MqttConnectionRetrier {
+ /** The guava-retrying retrier object. */
+ private final Retryer<Void> retrier;
+
+ /** Single-threaded pool. */
+ private final ExecutorService exec = Executors.newSingleThreadExecutor();
+
+ /**
+ * Constructor.
+ *
+ * @param retrier The retryier object.
+ */
+ public MqttConnectionRetrier(Retryer<Void> retrier) {
+ this.retrier = retrier;
+ }
+
+ /**
+ * Method called by the streamer to ask us to (re-)connect.
+ */
+ public void connect() {
+ Callable<Void> callable = retrier.wrap(new Callable<Void>() {
+ @Override public Void call() throws Exception {
+ // If we're already connected, return immediately.
+ if (client.isConnected())
+ return null;
+
+ if (stopped)
+ return null;
+
+ // Connect to broker.
+ if (connectOptions == null)
+ client.connect();
+ else
+ client.connect(connectOptions);
+
+ // Always use the multiple topics variant of the mqtt client; even if the user specified a single
+ // topic and/or QoS, the initialization code would have placed it inside the 1..n structures.
+ if (qualitiesOfService.isEmpty())
+ client.subscribe(topics.toArray(new String[0]));
+
+ else {
+ int[] qoses = new int[qualitiesOfService.size()];
+
+ for (int i = 0; i < qualitiesOfService.size(); i++)
+ qoses[i] = qualitiesOfService.get(i);
+
+ client.subscribe(topics.toArray(new String[0]), qoses);
+ }
+
+ if (log.isInfoEnabled())
+ log.info("MQTT Streamer (re-)connected and subscribed " + cachedLogValues);
+
+ return null;
+ }
+ });
+
+ Future<Void> result = exec.submit(callable);
+
+ if (blockUntilConnected) {
+ try {
+ result.get();
+ }
+ catch (Throwable e) {
+ throw new RuntimeException(e);
+ }
+ }
+ }
+
+ /**
+ * Stops this connection utility class by shutting down the thread pool.
+ */
+ public void stop() {
+ exec.shutdownNow();
+ }
+ }
+}
diff --git a/modules/mqtt-ext/src/main/java/org/apache/ignite/stream/mqtt/package-info.java b/modules/mqtt-ext/src/main/java/org/apache/ignite/stream/mqtt/package-info.java
new file mode 100644
index 0000000..9fec7fa
--- /dev/null
+++ b/modules/mqtt-ext/src/main/java/org/apache/ignite/stream/mqtt/package-info.java
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+/**
+ * Contains implementation of MQTT topic messages consumer.
+ */
+
+package org.apache.ignite.stream.mqtt;
diff --git a/modules/mqtt-ext/src/test/java/org/apache/ignite/stream/mqtt/IgniteMqttStreamerTest.java b/modules/mqtt-ext/src/test/java/org/apache/ignite/stream/mqtt/IgniteMqttStreamerTest.java
new file mode 100644
index 0000000..c024595
--- /dev/null
+++ b/modules/mqtt-ext/src/test/java/org/apache/ignite/stream/mqtt/IgniteMqttStreamerTest.java
@@ -0,0 +1,649 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.apache.ignite.stream.mqtt;
+
+import java.net.ServerSocket;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeSet;
+import java.util.UUID;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+import org.apache.activemq.broker.BrokerService;
+import org.apache.activemq.broker.region.policy.PolicyEntry;
+import org.apache.activemq.broker.region.policy.PolicyMap;
+import org.apache.activemq.command.ActiveMQTopic;
+import org.apache.ignite.Ignite;
+import org.apache.ignite.IgniteCache;
+import org.apache.ignite.IgniteDataStreamer;
+import org.apache.ignite.cache.CachePeekMode;
+import org.apache.ignite.configuration.IgniteConfiguration;
+import org.apache.ignite.events.CacheEvent;
+import org.apache.ignite.events.EventType;
+import org.apache.ignite.internal.util.lang.GridMapEntry;
+import org.apache.ignite.internal.util.typedef.F;
+import org.apache.ignite.lang.IgniteBiPredicate;
+import org.apache.ignite.lang.IgniteInClosure;
+import org.apache.ignite.stream.StreamMultipleTupleExtractor;
+import org.apache.ignite.stream.StreamSingleTupleExtractor;
+import org.apache.ignite.testframework.junits.common.GridCommonAbstractTest;
+
+import com.github.rholder.retry.StopStrategies;
+import com.github.rholder.retry.WaitStrategies;
+import com.google.common.base.Splitter;
+import org.eclipse.paho.client.mqttv3.MqttClient;
+import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
+import org.eclipse.paho.client.mqttv3.MqttException;
+import org.eclipse.paho.client.mqttv3.MqttMessage;
+import org.eclipse.paho.client.mqttv3.persist.MemoryPersistence;
+import org.junit.Ignore;
+import org.junit.Test;
+
+import static org.apache.ignite.events.EventType.EVT_CACHE_OBJECT_PUT;
+
+/**
+ * Test for {@link MqttStreamer}.
+ */
+public class IgniteMqttStreamerTest extends GridCommonAbstractTest {
+ /** The test data. */
+ private static final Map<Integer, String> TEST_DATA = new HashMap<>();
+
+ /** Topic name for single topic tests. */
+ private static final String SINGLE_TOPIC_NAME = "abc";
+
+ /** Topic names for multiple topic tests. */
+ private static final List<String> MULTIPLE_TOPIC_NAMES = Arrays.asList("def", "ghi", "jkl", "mno");
+
+ /** The AMQ broker with an MQTT interface. */
+ private BrokerService broker;
+
+ /** The MQTT client. */
+ private MqttClient client;
+
+ /** The broker URL. */
+ private String brokerUrl;
+
+ /** The broker port. **/
+ private int port;
+
+ /** The MQTT streamer currently under test. */
+ private MqttStreamer<Integer, String> streamer;
+
+ /** The UUID of the currently active remote listener. */
+ private UUID remoteLsnr;
+
+ /** The Ignite data streamer. */
+ private IgniteDataStreamer<Integer, String> dataStreamer;
+
+ static {
+ for (int i = 0; i < 100; i++)
+ TEST_DATA.put(i, "v" + i);
+ }
+
+ /** Constructor. */
+ public IgniteMqttStreamerTest() {
+ super(true);
+ }
+
+ /** {@inheritDoc} */
+ @Override protected IgniteConfiguration getConfiguration(String igniteInstanceName) throws Exception {
+ return super.getConfiguration(igniteInstanceName).setIncludeEventTypes(EventType.EVTS_ALL);
+ }
+
+ /**
+ * @throws Exception If failed.
+ */
+ @SuppressWarnings("unchecked")
+ @Override public void beforeTest() throws Exception {
+ grid().<Integer, String>getOrCreateCache(defaultCacheConfiguration());
+
+ // find an available local port
+ try (ServerSocket ss = new ServerSocket(0)) {
+ port = ss.getLocalPort();
+ }
+
+ // create the broker
+ broker = new BrokerService();
+ broker.setDeleteAllMessagesOnStartup(true);
+ broker.setPersistent(false);
+ broker.setPersistenceAdapter(null);
+ broker.setPersistenceFactory(null);
+
+ PolicyMap plcMap = new PolicyMap();
+ PolicyEntry plc = new PolicyEntry();
+
+ plc.setQueuePrefetch(1);
+
+ broker.setDestinationPolicy(plcMap);
+ broker.getDestinationPolicy().setDefaultEntry(plc);
+ broker.setSchedulerSupport(false);
+
+ // add the MQTT transport connector to the broker
+ broker.addConnector("mqtt://localhost:" + port);
+ broker.setStartAsync(false);
+ broker.start(true);
+
+ // create the broker URL
+ brokerUrl = "tcp://localhost:" + port;
+
+ // create the client and connect
+ client = new MqttClient(brokerUrl, UUID.randomUUID().toString(), new MemoryPersistence());
+
+ client.connect();
+
+ // create mqtt streamer
+ dataStreamer = grid().dataStreamer(DEFAULT_CACHE_NAME);
+
+ streamer = createMqttStreamer(dataStreamer);
+ }
+
+ /**
+ * @throws Exception If failed.
+ */
+ @Override public void afterTest() throws Exception {
+ try {
+ streamer.stop();
+ }
+ catch (Exception ignored) {
+ // ignore if already stopped
+ }
+
+ dataStreamer.close();
+
+ grid().cache(DEFAULT_CACHE_NAME).clear();
+
+ broker.stop();
+ broker.deleteAllMessages();
+ }
+
+ /**
+ * @throws Exception If failed.
+ */
+ @Test
+ public void testConnectDisconnect() throws Exception {
+ // configure streamer
+ streamer.setSingleTupleExtractor(singleTupleExtractor());
+ streamer.setTopic(SINGLE_TOPIC_NAME);
+ streamer.setBlockUntilConnected(true);
+
+ // action time: repeat 10 times; make sure the connection state is kept correctly every time
+ for (int i = 0; i < 10; i++) {
+ streamer.start();
+
+ assertTrue(streamer.isConnected());
+
+ streamer.stop();
+
+ assertFalse(streamer.isConnected());
+ }
+ }
+
+ /**
+ * @throws Exception If failed.
+ */
+ @Ignore("https://issues.apache.org/jira/browse/IGNITE-2255")
+ @Test
+ public void testConnectionStatusWithBrokerDisconnection() throws Exception {
+ // Configure streamer.
+ streamer.setSingleTupleExtractor(singleTupleExtractor());
+ streamer.setTopic(SINGLE_TOPIC_NAME);
+ streamer.setBlockUntilConnected(true);
+ streamer.setRetryWaitStrategy(WaitStrategies.noWait());
+
+ streamer.start();
+
+ // Action time: repeat 5 times; make sure the connection state is kept correctly every time.
+ for (int i = 0; i < 5; i++) {
+ log.info("Iteration: " + i);
+
+ assertTrue(streamer.isConnected());
+
+ broker.stop();
+
+ assertFalse(streamer.isConnected());
+
+ broker.start(true);
+ broker.waitUntilStarted();
+
+ Thread.sleep(500);
+ }
+ }
+
+ /**
+ * @throws Exception If failed.
+ */
+ @Test
+ public void testSingleTopic_NoQoS_OneEntryPerMessage() throws Exception {
+ // configure streamer
+ streamer.setSingleTupleExtractor(singleTupleExtractor());
+ streamer.setTopic(SINGLE_TOPIC_NAME);
+
+ // subscribe to cache PUT events
+ CountDownLatch latch = subscribeToPutEvents(50);
+
+ // action time
+ streamer.start();
+
+ // send messages
+ sendMessages(Arrays.asList(SINGLE_TOPIC_NAME), 0, 50, false);
+
+ // assertions
+ assertTrue(latch.await(10, TimeUnit.SECONDS));
+ assertCacheEntriesLoaded(50);
+ }
+
+ /**
+ * @throws Exception If failed.
+ */
+ @Test
+ public void testMultipleTopics_NoQoS_OneEntryPerMessage() throws Exception {
+ // configure streamer
+ streamer.setSingleTupleExtractor(singleTupleExtractor());
+ streamer.setTopics(MULTIPLE_TOPIC_NAMES);
+
+ // subscribe to cache PUT events
+ CountDownLatch latch = subscribeToPutEvents(50);
+
+ // action time
+ streamer.start();
+
+ // send messages
+ sendMessages(MULTIPLE_TOPIC_NAMES, 0, 50, false);
+
+ // assertions
+ assertTrue(latch.await(10, TimeUnit.SECONDS));
+ assertCacheEntriesLoaded(50);
+
+ assertTrue(broker.getBroker().getDestinationMap().size() >= 4);
+ assertTrue(broker.getBroker().getDestinationMap().containsKey(new ActiveMQTopic("def")));
+ assertTrue(broker.getBroker().getDestinationMap().containsKey(new ActiveMQTopic("ghi")));
+ }
+
+ /**
+ * @throws Exception If failed.
+ */
+ @Test
+ public void testSingleTopic_NoQoS_MultipleEntriesOneMessage() throws Exception {
+ // configure streamer
+ streamer.setMultipleTupleExtractor(multipleTupleExtractor());
+ streamer.setTopic(SINGLE_TOPIC_NAME);
+
+ // subscribe to cache PUT events
+ CountDownLatch latch = subscribeToPutEvents(50);
+
+ // action time
+ streamer.start();
+
+ // send messages
+ sendMessages(Arrays.asList(SINGLE_TOPIC_NAME), 0, 50, true);
+
+ // assertions
+ assertTrue(latch.await(10, TimeUnit.SECONDS));
+ assertCacheEntriesLoaded(50);
+ }
+
+ /**
+ * @throws Exception If failed.
+ */
+ @Test
+ public void testMultipleTopics_NoQoS_MultipleEntriesOneMessage() throws Exception {
+ // configure streamer
+ streamer.setMultipleTupleExtractor(multipleTupleExtractor());
+ streamer.setTopics(MULTIPLE_TOPIC_NAMES);
+
+ // subscribe to cache PUT events
+ CountDownLatch latch = subscribeToPutEvents(50);
+
+ // action time
+ streamer.start();
+
+ // send messages
+ sendMessages(MULTIPLE_TOPIC_NAMES, 0, 50, true);
+
+ // assertions
+ assertTrue(latch.await(10, TimeUnit.SECONDS));
+ assertCacheEntriesLoaded(50);
+
+ assertTrue(broker.getBroker().getDestinationMap().size() >= 4);
+ assertTrue(broker.getBroker().getDestinationMap().containsKey(new ActiveMQTopic("def")));
+ assertTrue(broker.getBroker().getDestinationMap().containsKey(new ActiveMQTopic("ghi")));
+ }
+
+ /**
+ * @throws Exception If failed.
+ */
+ @Test
+ public void testSingleTopic_NoQoS_ConnectOptions_Durable() throws Exception {
+ // configure streamer
+ streamer.setSingleTupleExtractor(singleTupleExtractor());
+ streamer.setTopic(SINGLE_TOPIC_NAME);
+
+ MqttConnectOptions connOptions = new MqttConnectOptions();
+ connOptions.setCleanSession(false);
+ streamer.setConnectOptions(connOptions);
+
+ // subscribe to cache PUT events
+ CountDownLatch latch = subscribeToPutEvents(50);
+
+ // action time
+ streamer.start();
+
+ // send messages
+ sendMessages(Arrays.asList(SINGLE_TOPIC_NAME), 0, 50, false);
+
+ // assertions
+ assertTrue(latch.await(10, TimeUnit.SECONDS));
+ assertCacheEntriesLoaded(50);
+
+ // explicitly stop the streamer
+ streamer.stop();
+
+ // send messages while stopped
+ sendMessages(Arrays.asList(SINGLE_TOPIC_NAME), 50, 50, false);
+
+ latch = subscribeToPutEvents(50);
+
+ // start the streamer again
+ streamer.start();
+
+ // assertions - make sure that messages sent during disconnection were also received
+ assertTrue(latch.await(10, TimeUnit.SECONDS));
+ assertCacheEntriesLoaded(100);
+ }
+
+ /**
+ * @throws Exception If failed.
+ */
+ @Test
+ public void testSingleTopic_NoQoS_Reconnect() throws Exception {
+ // configure streamer
+ streamer.setSingleTupleExtractor(singleTupleExtractor());
+ streamer.setRetryWaitStrategy(WaitStrategies.noWait());
+ streamer.setRetryStopStrategy(StopStrategies.neverStop());
+ streamer.setTopic(SINGLE_TOPIC_NAME);
+
+ // subscribe to cache PUT events
+ CountDownLatch latch = subscribeToPutEvents(50);
+
+ // action time
+ streamer.start();
+
+ // send messages
+ sendMessages(Arrays.asList(SINGLE_TOPIC_NAME), 0, 50, false);
+
+ // assertions
+ assertTrue(latch.await(10, TimeUnit.SECONDS));
+ assertCacheEntriesLoaded(50);
+
+ // now shutdown the broker, wait 2 seconds and start it again
+ broker.stop();
+ broker.start(true);
+ broker.waitUntilStarted();
+
+ Thread.sleep(2000);
+
+ client.connect();
+
+ // let's ensure we have 2 connections: Ignite and our test
+ assertEquals(2, broker.getTransportConnectorByScheme("mqtt").getConnections().size());
+
+ // subscribe to cache PUT events again
+ latch = subscribeToPutEvents(50);
+
+ // send messages
+ sendMessages(Arrays.asList(SINGLE_TOPIC_NAME), 50, 50, false);
+
+ // assertions
+ assertTrue(latch.await(10, TimeUnit.SECONDS));
+ assertCacheEntriesLoaded(100);
+ }
+
+ /**
+ * @throws Exception If failed.
+ */
+ @Test
+ public void testSingleTopic_NoQoS_RetryOnce() throws Exception {
+ // configure streamer
+ streamer.setSingleTupleExtractor(singleTupleExtractor());
+ streamer.setRetryWaitStrategy(WaitStrategies.noWait());
+ streamer.setRetryStopStrategy(StopStrategies.stopAfterAttempt(1));
+ streamer.setTopic(SINGLE_TOPIC_NAME);
+
+ // subscribe to cache PUT events
+ CountDownLatch latch = subscribeToPutEvents(50);
+
+ // action time
+ streamer.start();
+
+ // send messages
+ sendMessages(Arrays.asList(SINGLE_TOPIC_NAME), 0, 50, false);
+
+ // assertions
+ assertTrue(latch.await(10, TimeUnit.SECONDS));
+ assertCacheEntriesLoaded(50);
+
+ // now shutdown the broker, wait 2 seconds and start it again
+ broker.stop();
+ broker.start(true);
+
+ broker.waitUntilStarted();
+
+ client.connect();
+
+ // lets send messages and ensure they are not received, because our retrier desisted
+ sendMessages(Arrays.asList(SINGLE_TOPIC_NAME), 50, 50, false);
+
+ Thread.sleep(3000);
+
+ assertNull(grid().cache(DEFAULT_CACHE_NAME).get(50));
+ }
+
+ /**
+ * @throws Exception If failed.
+ */
+ @Test
+ public void testMultipleTopics_MultipleQoS_OneEntryPerMessage() throws Exception {
+ // configure streamer
+ streamer.setSingleTupleExtractor(singleTupleExtractor());
+ streamer.setTopics(MULTIPLE_TOPIC_NAMES);
+ streamer.setQualitiesOfService(Arrays.asList(1, 1, 1, 1));
+
+ // subscribe to cache PUT events
+ CountDownLatch latch = subscribeToPutEvents(50);
+
+ // action time
+ streamer.start();
+
+ // send messages
+ sendMessages(MULTIPLE_TOPIC_NAMES, 0, 50, false);
+
+ // assertions
+ assertTrue(latch.await(10, TimeUnit.SECONDS));
+ assertCacheEntriesLoaded(50);
+
+ assertTrue(broker.getBroker().getDestinationMap().size() >= 4);
+ assertTrue(broker.getBroker().getDestinationMap().containsKey(new ActiveMQTopic("def")));
+ assertTrue(broker.getBroker().getDestinationMap().containsKey(new ActiveMQTopic("ghi")));
+ }
+
+ /**
+ * @throws Exception If failed.
+ */
+ @Test
+ public void testMultipleTopics_MultipleQoS_Mismatch() throws Exception {
+ // configure streamer
+ streamer.setSingleTupleExtractor(singleTupleExtractor());
+ streamer.setTopics(MULTIPLE_TOPIC_NAMES);
+ streamer.setQualitiesOfService(Arrays.asList(1, 1, 1));
+
+ try {
+ streamer.start();
+ }
+ catch (Exception ignored) {
+ return;
+ }
+
+ fail("Expected an exception reporting invalid parameters");
+ }
+
+ /**
+ * @param dataStreamer Streamer.
+ * @return MQTT streamer.
+ */
+ private MqttStreamer<Integer, String> createMqttStreamer(IgniteDataStreamer<Integer, String> dataStreamer) {
+ MqttStreamer<Integer, String> streamer = new MqttStreamer<>();
+ streamer.setIgnite(grid());
+ streamer.setStreamer(dataStreamer);
+ streamer.setBrokerUrl(brokerUrl);
+ streamer.setClientId(UUID.randomUUID().toString());
+ streamer.setBlockUntilConnected(true);
+
+ dataStreamer.allowOverwrite(true);
+ dataStreamer.autoFlushFrequency(1);
+
+ return streamer;
+ }
+
+ /**
+ * @param topics Topics.
+ * @param fromIdx From index.
+ * @param cnt Count.
+ * @param singleMsg Single message flag.
+ * @throws MqttException If failed.
+ */
+ private void sendMessages(final List<String> topics, int fromIdx, int cnt, boolean singleMsg)
+ throws MqttException {
+ if (singleMsg) {
+ final List<StringBuilder> sbs = new ArrayList<>(topics.size());
+
+ // initialize String Builders for each topic
+ F.forEach(topics, new IgniteInClosure<String>() {
+ @Override public void apply(String s) {
+ sbs.add(new StringBuilder());
+ }
+ });
+
+ // fill String Builders for each topic
+ F.forEach(F.range(fromIdx, fromIdx + cnt), new IgniteInClosure<Integer>() {
+ @Override public void apply(Integer integer) {
+ sbs.get(integer % topics.size()).append(integer.toString() + "," + TEST_DATA.get(integer) + "\n");
+ }
+ });
+
+ // send each buffer out
+ for (int i = 0; i < topics.size(); i++) {
+ MqttMessage msg = new MqttMessage(sbs.get(i).toString().getBytes());
+
+ client.publish(topics.get(i % topics.size()), msg);
+ }
+ }
+ else {
+ for (int i = fromIdx; i < fromIdx + cnt; i++) {
+ byte[] payload = (i + "," + TEST_DATA.get(i)).getBytes();
+
+ MqttMessage msg = new MqttMessage(payload);
+
+ client.publish(topics.get(i % topics.size()), msg);
+ }
+ }
+ }
+
+ /**
+ * @param expect Expected count.
+ * @return Latch to be counted down in listener.
+ */
+ private CountDownLatch subscribeToPutEvents(int expect) {
+ Ignite ignite = grid();
+
+ // Listen to cache PUT events and expect as many as messages as test data items
+ final CountDownLatch latch = new CountDownLatch(expect);
+
+ IgniteBiPredicate<UUID, CacheEvent> cb = new IgniteBiPredicate<UUID, CacheEvent>() {
+ @Override public boolean apply(UUID uuid, CacheEvent evt) {
+ latch.countDown();
+
+ return true;
+ }
+ };
+
+ remoteLsnr = ignite.events(ignite.cluster().forCacheNodes(DEFAULT_CACHE_NAME))
+ .remoteListen(cb, null, EVT_CACHE_OBJECT_PUT);
+
+ return latch;
+ }
+
+ /**
+ * @param cnt Count.
+ */
+ private void assertCacheEntriesLoaded(int cnt) {
+ // get the cache and check that the entries are present
+ IgniteCache<Integer, String> cache = grid().cache(DEFAULT_CACHE_NAME);
+
+ // for each key from 0 to count from the TEST_DATA (ordered by key), check that the entry is present in cache
+ for (Integer key : new ArrayList<>(new TreeSet<>(TEST_DATA.keySet())).subList(0, cnt))
+ assertEquals(TEST_DATA.get(key), cache.get(key));
+
+ // assert that the cache exactly the specified amount of elements
+ assertEquals(cnt, cache.size(CachePeekMode.ALL));
+
+ // remove the event listener
+ grid().events(grid().cluster().forCacheNodes(DEFAULT_CACHE_NAME)).stopRemoteListen(remoteLsnr);
+ }
+
+ /**
+ * @return {@link StreamSingleTupleExtractor} for testing.
+ */
+ public static StreamSingleTupleExtractor<MqttMessage, Integer, String> singleTupleExtractor() {
+ return new StreamSingleTupleExtractor<MqttMessage, Integer, String>() {
+ @Override public Map.Entry<Integer, String> extract(MqttMessage msg) {
+ List<String> s = Splitter.on(",").splitToList(new String(msg.getPayload()));
+
+ return new GridMapEntry<>(Integer.parseInt(s.get(0)), s.get(1));
+ }
+ };
+ }
+
+ /**
+ * @return {@link StreamMultipleTupleExtractor} for testing.
+ */
+ public static StreamMultipleTupleExtractor<MqttMessage, Integer, String> multipleTupleExtractor() {
+ return new StreamMultipleTupleExtractor<MqttMessage, Integer, String>() {
+ @Override public Map<Integer, String> extract(MqttMessage msg) {
+ final Map<String, String> map = Splitter.on("\n")
+ .omitEmptyStrings()
+ .withKeyValueSeparator(",")
+ .split(new String(msg.getPayload()));
+
+ final Map<Integer, String> answer = new HashMap<>();
+
+ F.forEach(map.keySet(), new IgniteInClosure<String>() {
+ @Override public void apply(String s) {
+ answer.put(Integer.parseInt(s), map.get(s));
+ }
+ });
+
+ return answer;
+ }
+ };
+ }
+
+}
diff --git a/modules/mqtt-ext/src/test/java/org/apache/ignite/stream/mqtt/IgniteMqttStreamerTestSuite.java b/modules/mqtt-ext/src/test/java/org/apache/ignite/stream/mqtt/IgniteMqttStreamerTestSuite.java
new file mode 100644
index 0000000..ed0c2f7
--- /dev/null
+++ b/modules/mqtt-ext/src/test/java/org/apache/ignite/stream/mqtt/IgniteMqttStreamerTestSuite.java
@@ -0,0 +1,32 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.apache.ignite.stream.mqtt;
+
+import org.junit.runner.RunWith;
+import org.junit.runners.Suite;
+
+/**
+ * MQTT streamer tests.
+ */
+@RunWith(Suite.class)
+@Suite.SuiteClasses({
+ IgniteMqttStreamerTest.class
+})
+public class IgniteMqttStreamerTestSuite {
+
+}
diff --git a/modules/mqtt-ext/src/test/java/org/apache/ignite/stream/mqtt/package-info.java b/modules/mqtt-ext/src/test/java/org/apache/ignite/stream/mqtt/package-info.java
new file mode 100644
index 0000000..9fec7fa
--- /dev/null
+++ b/modules/mqtt-ext/src/test/java/org/apache/ignite/stream/mqtt/package-info.java
@@ -0,0 +1,22 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+/**
+ * Contains implementation of MQTT topic messages consumer.
+ */
+
+package org.apache.ignite.stream.mqtt;
diff --git a/pom.xml b/pom.xml
index 4fd028d..d2d14bc 100644
--- a/pom.xml
+++ b/pom.xml
@@ -50,6 +50,7 @@
<module>modules/zeromq-ext</module>
<module>modules/twitter-ext</module>
<module>modules/rocketmq-ext</module>
+ <module>modules/mqtt-ext</module>
</modules>
<profiles>
