├── .github
└── workflows
│ └── maven.yml
├── .gitignore
├── Dockerfile
├── LICENSE
├── README.md
├── docker-compose
├── fullstack
│ ├── docker-compose.yml
│ └── env.list
└── standalone
│ └── docker-compose.yml
├── docker
└── setConfiguration.sh
├── pom.xml
├── simple_kafka_mqtt_connector.iml
└── src
└── main
├── java
└── de
│ └── fhg
│ └── ipa
│ └── null70
│ └── simple_kafka_mqtt_connector
│ ├── Main.java
│ └── SimpleKafkaMQTTConnector.java
└── resources
├── application.properties
└── log4j2.xml
/.github/workflows/maven.yml:
--------------------------------------------------------------------------------
1 | name: Java CI
2 |
3 | on: [push]
4 |
5 | jobs:
6 | build:
7 |
8 | runs-on: ubuntu-latest
9 |
10 | steps:
11 | - uses: actions/checkout@v1
12 | - name: Set up JDK 1.8
13 | uses: actions/setup-java@v1
14 | with:
15 | java-version: 1.8
16 | - name: Build with Maven
17 | run: mvn -B package --file pom.xml
18 |
--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
1 | .idea
2 | target
3 | !target/*jar-with-dependencies.jar
4 | /target
5 |
--------------------------------------------------------------------------------
/Dockerfile:
--------------------------------------------------------------------------------
1 | FROM openjdk:8u312-jdk-slim
2 |
3 | ENV SERVER_INSTALL_FOLDER=/app/kafka-mqtt-connector/
4 | ENV JAR_FILE_NAME=simple_kafka_mqtt_connector-0.1.0-jar-with-dependencies.jar
5 |
6 | # Application propertis
7 | ENV KAFKA_HOST=localhosts
8 | ENV KAFKA_PORT=9092
9 | ENV KAFKA_CLIENT_ID=testing-kafka-producer-1
10 |
11 | ENV MQTT_HOST=localhost
12 | ENV MQTT_PORT=1883
13 | ENV MQTT_CLIENT_ID=mqtt-client-1
14 | ENV MQTT_QOS=2
15 |
16 | ENV TOPIC_MAPPING=robotgroup001/robot001>>>test;robotgroup001/robot002>>>test02;robotgroup001/robot003>>>test03
17 |
18 | RUN mkdir -p "${SERVER_INSTALL_FOLDER}log"
19 |
20 | #SERVER:
21 | ADD src/main/resources/application.properties ${SERVER_INSTALL_FOLDER}
22 | ADD target/${JAR_FILE_NAME} ${SERVER_INSTALL_FOLDER}
23 |
24 | ADD docker/setConfiguration.sh ${SERVER_INSTALL_FOLDER}
25 |
26 | WORKDIR ${SERVER_INSTALL_FOLDER}
27 |
28 |
29 | CMD bash ${SERVER_INSTALL_FOLDER}setConfiguration.sh "${SERVER_INSTALL_FOLDER}application.properties" \
30 | "$KAFKA_HOST" "$KAFKA_PORT" "$KAFKA_CLIENT_ID" \
31 | "$MQTT_HOST" "$MQTT_PORT" "$MQTT_CLIENT_ID" "$MQTT_QOS" \
32 | "$TOPIC_MAPPING" \
33 | && java -jar -Xmx1024m -Xms512m ${JAR_FILE_NAME}
34 |
35 |
--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
1 | Apache License
2 | Version 2.0, January 2004
3 | http://www.apache.org/licenses/
4 |
5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
6 |
7 | 1. Definitions.
8 |
9 | "License" shall mean the terms and conditions for use, reproduction,
10 | and distribution as defined by Sections 1 through 9 of this document.
11 |
12 | "Licensor" shall mean the copyright owner or entity authorized by
13 | the copyright owner that is granting the License.
14 |
15 | "Legal Entity" shall mean the union of the acting entity and all
16 | other entities that control, are controlled by, or are under common
17 | control with that entity. For the purposes of this definition,
18 | "control" means (i) the power, direct or indirect, to cause the
19 | direction or management of such entity, whether by contract or
20 | otherwise, or (ii) ownership of fifty percent (50%) or more of the
21 | outstanding shares, or (iii) beneficial ownership of such entity.
22 |
23 | "You" (or "Your") shall mean an individual or Legal Entity
24 | exercising permissions granted by this License.
25 |
26 | "Source" form shall mean the preferred form for making modifications,
27 | including but not limited to software source code, documentation
28 | source, and configuration files.
29 |
30 | "Object" form shall mean any form resulting from mechanical
31 | transformation or translation of a Source form, including but
32 | not limited to compiled object code, generated documentation,
33 | and conversions to other media types.
34 |
35 | "Work" shall mean the work of authorship, whether in Source or
36 | Object form, made available under the License, as indicated by a
37 | copyright notice that is included in or attached to the work
38 | (an example is provided in the Appendix below).
39 |
40 | "Derivative Works" shall mean any work, whether in Source or Object
41 | form, that is based on (or derived from) the Work and for which the
42 | editorial revisions, annotations, elaborations, or other modifications
43 | represent, as a whole, an original work of authorship. For the purposes
44 | of this License, Derivative Works shall not include works that remain
45 | separable from, or merely link (or bind by name) to the interfaces of,
46 | the Work and Derivative Works thereof.
47 |
48 | "Contribution" shall mean any work of authorship, including
49 | the original version of the Work and any modifications or additions
50 | to that Work or Derivative Works thereof, that is intentionally
51 | submitted to Licensor for inclusion in the Work by the copyright owner
52 | or by an individual or Legal Entity authorized to submit on behalf of
53 | the copyright owner. For the purposes of this definition, "submitted"
54 | means any form of electronic, verbal, or written communication sent
55 | to the Licensor or its representatives, including but not limited to
56 | communication on electronic mailing lists, source code control systems,
57 | and issue tracking systems that are managed by, or on behalf of, the
58 | Licensor for the purpose of discussing and improving the Work, but
59 | excluding communication that is conspicuously marked or otherwise
60 | designated in writing by the copyright owner as "Not a Contribution."
61 |
62 | "Contributor" shall mean Licensor and any individual or Legal Entity
63 | on behalf of whom a Contribution has been received by Licensor and
64 | subsequently incorporated within the Work.
65 |
66 | 2. Grant of Copyright License. Subject to the terms and conditions of
67 | this License, each Contributor hereby grants to You a perpetual,
68 | worldwide, non-exclusive, no-charge, royalty-free, irrevocable
69 | copyright license to reproduce, prepare Derivative Works of,
70 | publicly display, publicly perform, sublicense, and distribute the
71 | Work and such Derivative Works in Source or Object form.
72 |
73 | 3. Grant of Patent License. Subject to the terms and conditions of
74 | this License, each Contributor hereby grants to You a perpetual,
75 | worldwide, non-exclusive, no-charge, royalty-free, irrevocable
76 | (except as stated in this section) patent license to make, have made,
77 | use, offer to sell, sell, import, and otherwise transfer the Work,
78 | where such license applies only to those patent claims licensable
79 | by such Contributor that are necessarily infringed by their
80 | Contribution(s) alone or by combination of their Contribution(s)
81 | with the Work to which such Contribution(s) was submitted. If You
82 | institute patent litigation against any entity (including a
83 | cross-claim or counterclaim in a lawsuit) alleging that the Work
84 | or a Contribution incorporated within the Work constitutes direct
85 | or contributory patent infringement, then any patent licenses
86 | granted to You under this License for that Work shall terminate
87 | as of the date such litigation is filed.
88 |
89 | 4. Redistribution. You may reproduce and distribute copies of the
90 | Work or Derivative Works thereof in any medium, with or without
91 | modifications, and in Source or Object form, provided that You
92 | meet the following conditions:
93 |
94 | (a) You must give any other recipients of the Work or
95 | Derivative Works a copy of this License; and
96 |
97 | (b) You must cause any modified files to carry prominent notices
98 | stating that You changed the files; and
99 |
100 | (c) You must retain, in the Source form of any Derivative Works
101 | that You distribute, all copyright, patent, trademark, and
102 | attribution notices from the Source form of the Work,
103 | excluding those notices that do not pertain to any part of
104 | the Derivative Works; and
105 |
106 | (d) If the Work includes a "NOTICE" text file as part of its
107 | distribution, then any Derivative Works that You distribute must
108 | include a readable copy of the attribution notices contained
109 | within such NOTICE file, excluding those notices that do not
110 | pertain to any part of the Derivative Works, in at least one
111 | of the following places: within a NOTICE text file distributed
112 | as part of the Derivative Works; within the Source form or
113 | documentation, if provided along with the Derivative Works; or,
114 | within a display generated by the Derivative Works, if and
115 | wherever such third-party notices normally appear. The contents
116 | of the NOTICE file are for informational purposes only and
117 | do not modify the License. You may add Your own attribution
118 | notices within Derivative Works that You distribute, alongside
119 | or as an addendum to the NOTICE text from the Work, provided
120 | that such additional attribution notices cannot be construed
121 | as modifying the License.
122 |
123 | You may add Your own copyright statement to Your modifications and
124 | may provide additional or different license terms and conditions
125 | for use, reproduction, or distribution of Your modifications, or
126 | for any such Derivative Works as a whole, provided Your use,
127 | reproduction, and distribution of the Work otherwise complies with
128 | the conditions stated in this License.
129 |
130 | 5. Submission of Contributions. Unless You explicitly state otherwise,
131 | any Contribution intentionally submitted for inclusion in the Work
132 | by You to the Licensor shall be under the terms and conditions of
133 | this License, without any additional terms or conditions.
134 | Notwithstanding the above, nothing herein shall supersede or modify
135 | the terms of any separate license agreement you may have executed
136 | with Licensor regarding such Contributions.
137 |
138 | 6. Trademarks. This License does not grant permission to use the trade
139 | names, trademarks, service marks, or product names of the Licensor,
140 | except as required for reasonable and customary use in describing the
141 | origin of the Work and reproducing the content of the NOTICE file.
142 |
143 | 7. Disclaimer of Warranty. Unless required by applicable law or
144 | agreed to in writing, Licensor provides the Work (and each
145 | Contributor provides its Contributions) on an "AS IS" BASIS,
146 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
147 | implied, including, without limitation, any warranties or conditions
148 | of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
149 | PARTICULAR PURPOSE. You are solely responsible for determining the
150 | appropriateness of using or redistributing the Work and assume any
151 | risks associated with Your exercise of permissions under this License.
152 |
153 | 8. Limitation of Liability. In no event and under no legal theory,
154 | whether in tort (including negligence), contract, or otherwise,
155 | unless required by applicable law (such as deliberate and grossly
156 | negligent acts) or agreed to in writing, shall any Contributor be
157 | liable to You for damages, including any direct, indirect, special,
158 | incidental, or consequential damages of any character arising as a
159 | result of this License or out of the use or inability to use the
160 | Work (including but not limited to damages for loss of goodwill,
161 | work stoppage, computer failure or malfunction, or any and all
162 | other commercial damages or losses), even if such Contributor
163 | has been advised of the possibility of such damages.
164 |
165 | 9. Accepting Warranty or Additional Liability. While redistributing
166 | the Work or Derivative Works thereof, You may choose to offer,
167 | and charge a fee for, acceptance of support, warranty, indemnity,
168 | or other liability obligations and/or rights consistent with this
169 | License. However, in accepting such obligations, You may act only
170 | on Your own behalf and on Your sole responsibility, not on behalf
171 | of any other Contributor, and only if You agree to indemnify,
172 | defend, and hold each Contributor harmless for any liability
173 | incurred by, or claims asserted against, such Contributor by reason
174 | of your accepting any such warranty or additional liability.
175 |
176 | END OF TERMS AND CONDITIONS
177 |
178 | APPENDIX: How to apply the Apache License to your work.
179 |
180 | To apply the Apache License to your work, attach the following
181 | boilerplate notice, with the fields enclosed by brackets "[]"
182 | replaced with your own identifying information. (Don't include
183 | the brackets!) The text should be enclosed in the appropriate
184 | comment syntax for the file format. We also recommend that a
185 | file or class name and description of purpose be included on the
186 | same "printed page" as the copyright notice for easier
187 | identification within third-party archives.
188 |
189 | Copyright 2019 Arthur Grigorjan, Fraunhofer Institute for Manufacturing Engineering and Automation (IPA)
190 |
191 | Licensed under the Apache License, Version 2.0 (the "License");
192 | you may not use this file except in compliance with the License.
193 | You may obtain a copy of the License at
194 |
195 | http://www.apache.org/licenses/LICENSE-2.0
196 |
197 | Unless required by applicable law or agreed to in writing, software
198 | distributed under the License is distributed on an "AS IS" BASIS,
199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
200 | See the License for the specific language governing permissions and
201 | limitations under the License.
202 |
--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
1 | # A simple MQTT to Apache Kafka Connector
2 | [](https://app.fossa.com/projects/git%2Bgithub.com%2Fipa-digitools%2Fsimple-kafka-mqtt-connector?ref=badge_shield)
3 |
4 |
5 |
6 |
7 | ## Usage
8 |
9 | #### Prerequisites
10 | * Java 8 or higher
11 |
12 |
13 | #### Configuration
14 |
15 | * Edit the application.properties-file
16 |
17 | * kafka.host = IP THROUGH WHICH THE KAFKA BROKER WILL BE REACHED [HOSTNAME|IP]
18 | * kafka.port = [INTEGER]
19 | * kafka.client.id = [STRING]
20 |
21 | * mqtt.host = IP THROUGH WHICH THE MQTT BROKER WILL BE REACHED [HOSTNAME|IP]
22 | * mqtt.port = [INTEGER]
23 | * mqtt.client.id = [STRING]
24 | * mqtt.qos = Quality of service for MQTT - [INTEGER] Allowed[0,1,2]
25 |
26 | * topic.mapping = How are topics routed from MQTT to Kafka - (Separators >>> and ;) Example mqttTopicA>>>kafkaTopicA;mqttTopicB>>>kafkaTopicB;mqttTopicC>>>kafkaTopicC
27 |
28 | #### How to build
29 |
30 | * Run: `mvn clean install`
31 |
32 |
33 | #### How to run
34 |
35 | * Place the jar with dependencies and your edited application.properties-file in the same directory
36 |
37 | * Open a bash or CMD in the same directory as the .jar
38 |
39 | * Run: `java -jar simple_kafka_mqtt_connector-0.0.1-SNAPSHOT-jar-with-dependencies.jar`
40 |
41 |
42 | ## Usage with Docker
43 |
44 | * Docker Hub https://hub.docker.com/r/arthurgrigo/simple-kafka-mqtt-connector
45 |
46 | * Run (edit enviroment variables to your needs!) : `docker run -d -t -i -e KAFKA_HOST='localhost' -e KAFKA_PORT=9092 -e KAFKA_CLIENT_ID='testing-kafka-producer-1' -e MQTT_HOST='localhost' -e MQTT_PORT=1883 -e MQTT_CLIENT_ID='mqtt-client-1' -e MQTT_QOS=2 -e TOPIC_MAPPING='robotgroup001/robot001>>>test;robotgroup001/robot002>>>test02;robotgroup001/robot003>>>test03' --name simple-kafka-mqtt-connector arthurgrigo/simple-kafka-mqtt-connector:latest`
47 |
48 |
49 | ## Usage with Docker-Compose
50 |
51 | * See [docker-compose-examples](docker-compose)
52 |
53 | #### Standalone
54 |
55 | * Stand-alone container
56 |
57 | * [docker-compose.yml](docker-compose/standalone/docker-compose.yml)
58 |
59 | * Run: `docker-compose up -d`
60 |
61 |
62 | #### Full Stack
63 |
64 | * Full Stack (mqtt-broker, zookeeper, kafka-broker, simple-kafka-mqtt-connector)
65 |
66 | * [docker-compose.yml](docker-compose/fullstack/docker-compose.yml)
67 |
68 | * [env.list](docker-compose/fullstack/env.list)
69 |
70 | * Place docker-compose.yml and env.list in the same directory
71 |
72 | * Edit env.list to your needs!
73 |
74 | * Run: `docker-compose up -d`
75 |
76 |
77 | ## License
78 | See [LICENSE](LICENSE) file for License
79 |
80 | [](https://app.fossa.com/projects/git%2Bgithub.com%2Fipa-digitools%2Fsimple-kafka-mqtt-connector?ref=badge_large)
--------------------------------------------------------------------------------
/docker-compose/fullstack/docker-compose.yml:
--------------------------------------------------------------------------------
1 | version: '2'
2 |
3 | services:
4 |
5 | simple-kafka-mqtt-connector:
6 | image: arthurgrigo/simple-kafka-mqtt-connector:0.1.0
7 | restart: always
8 | hostname: simple-kafka-mqtt-connector
9 | container_name: simple-kafka-mqtt-connector
10 | env_file:
11 | - env.list
12 | networks:
13 | - kafka_mqtt_network
14 |
15 | mosquitto:
16 | image: eclipse-mosquitto:2.0.14
17 | restart: always
18 | hostname: mosquitto
19 | container_name: mosquitto
20 | ports:
21 | - "1883:1883"
22 | networks:
23 | - kafka_mqtt_network
24 |
25 | zookeeper:
26 | image: wurstmeister/zookeeper
27 | restart: always
28 | hostname: zookeeper
29 | container_name: zookeeper
30 | ports:
31 | - "2181:2181"
32 | env_file:
33 | - env.list
34 | volumes:
35 | - ./zookeeper/data:/data
36 | - ./zookeeper/datalog:/datalog
37 | networks:
38 | - kafka_mqtt_network
39 |
40 | kafka:
41 | image: wurstmeister/kafka:2.13-2.8.1
42 | restart: always
43 | hostname: kafka
44 | container_name: kafka
45 | ports:
46 | - "9092:9092"
47 | env_file:
48 | - env.list
49 | volumes:
50 | - /var/run/docker.sock:/var/run/docker.sock
51 | networks:
52 | - kafka_mqtt_network
53 |
54 | networks:
55 | kafka_mqtt_network:
56 | driver: bridge
57 | ipam:
58 | config:
59 | - subnet: 192.168.115.0/24
60 | gateway: 192.168.115.1
61 |
--------------------------------------------------------------------------------
/docker-compose/fullstack/env.list:
--------------------------------------------------------------------------------
1 | ########
2 | #
3 | # simple-kafka-mqtt-connector
4 | #
5 | ########
6 |
7 | # !EDITME! IP THROUGH WHICH THE KAFKA BROKER WILL BE REACHED
8 | KAFKA_HOST= kafka
9 |
10 | KAFKA_PORT= 9092
11 | KAFKA_CLIENT_ID= simple-kafka-mqtt-connector-1
12 |
13 | # !EDITME! IP THROUGH WHICH THE MQTT BROKER WILL BE REACHED
14 | MQTT_HOST= mosquitto
15 | MQTT_PORT= 1883
16 | MQTT_CLIENT_ID= simple-kafka-mqtt-connector-1
17 | MQTT_QOS= 2
18 |
19 | #!EDITME! mqttTopicA>>>kafkaTopicA;mqttTopicB>>>kafkaTopicB;mqttTopicC>>>kafkaTopicC
20 | TOPIC_MAPPING= robotgroup001/robot001>>>test;robotgroup001/robot002>>>test02;robotgroup001/robot003>>>test03
21 |
22 | ########
23 | #
24 | # zookeeper
25 | #
26 | ########
27 | ZOO_MY_ID= 1
28 | ZOO_PORT= 2181
29 | ZOO_SERVERS= server.1=zookeeper:2888:3888
30 |
31 |
32 | ########
33 | #
34 | # kafka
35 | #
36 | ########
37 |
38 | # !EDITME! How will kafka producers reach this broker?
39 | KAFKA_ADVERTISED_HOST_NAME= kafka
40 |
41 | KAFKA_AUTO_CREATE_TOPICS_ENABLE= true
42 | # KAFKA_CREATE_TOPICS= "test:1:1"
43 | KAFKA_ZOOKEEPER_CONNECT= zookeeper:2181
--------------------------------------------------------------------------------
/docker-compose/standalone/docker-compose.yml:
--------------------------------------------------------------------------------
1 | version: '2'
2 |
3 | services:
4 |
5 | simple-kafka-mqtt-connector:
6 | image: arthurgrigo/simple-kafka-mqtt-connector:0.1.0
7 | restart: always
8 | hostname: simple-kafka-mqtt-connector
9 | container_name: simple-kafka-mqtt-connector
10 | environment:
11 | KAFKA_HOST: 172.21.5.239 #EDITME IP THROUGH WHICH THE KAFKA BROKER WILL BE REACHED
12 | KAFKA_PORT: 9092
13 | KAFKA_CLIENT_ID: simple-kafka-mqtt-connector-1
14 | MQTT_HOST: 172.21.5.239 #EDITME IP THROUGH WHICH THE MQTT BROKER WILL BE REACHED
15 | MQTT_PORT: 1883
16 | MQTT_CLIENT_ID: simple-kafka-mqtt-connector-1
17 | MQTT_QOS: 2
18 | TOPIC_MAPPING: robotgroup001/robot001>>>test;robotgroup001/robot002>>>test02;robotgroup001/robot003>>>test03 #EDITME mqttTopicA>>>kafkaTopicA;mqttTopicB>>>kafkaTopicB;mqttTopicC>>>kafkaTopicC
19 |
--------------------------------------------------------------------------------
/docker/setConfiguration.sh:
--------------------------------------------------------------------------------
1 | #!/usr/bin/env bash
2 |
3 | # Read arguments
4 | application_properties_file=${1}
5 |
6 | KAFKA_HOST=${2}
7 | KAFKA_PORT=${3}
8 | KAFKA_CLIENT_ID=${4}
9 |
10 | MQTT_HOST=${5}
11 | MQTT_PORT=${6}
12 | MQTT_CLIENT_ID=${7}
13 | MQTT_QOS=${8}
14 |
15 | TOPIC_MAPPING=${9}
16 |
17 |
18 | echo "Configuration:"
19 | echo "Application properties file: $application_properties_file"
20 | echo "KAFKA_HOST: $KAFKA_HOST"
21 | echo "KAFKA_PORT: $KAFKA_PORT"
22 | echo "KAFKA_CLIENT_ID: $KAFKA_CLIENT_ID"
23 | echo "MQTT_HOST: $MQTT_HOST"
24 | echo "MQTT_PORT: $MQTT_PORT"
25 | echo "MQTT_CLIENT_ID: $MQTT_CLIENT_ID"
26 | echo "MQTT_QOS: $MQTT_QOS"
27 | echo "TOPIC_MAPPING: $TOPIC_MAPPING"
28 |
29 | # overwrite properties
30 | sed -i "/kafka.host/c\kafka.host = $KAFKA_HOST" ${application_properties_file}
31 | sed -i "/kafka.port/c\kafka.port = $KAFKA_PORT" ${application_properties_file}
32 | sed -i "/kafka.client.id/c\kafka.client.id = $KAFKA_CLIENT_ID" ${application_properties_file}
33 |
34 | sed -i "/mqtt.host/c\mqtt.host = $MQTT_HOST" ${application_properties_file}
35 | sed -i "/mqtt.port/c\mqtt.port = $MQTT_PORT" ${application_properties_file}
36 | sed -i "/mqtt.client.id/c\mqtt.client.id = $MQTT_CLIENT_ID" ${application_properties_file}
37 | sed -i "/mqtt.qos/c\mqtt.qos = $MQTT_QOS" ${application_properties_file}
38 |
39 | sed -i "/topic.mapping/c\topic.mapping = $TOPIC_MAPPING" ${application_properties_file}
40 |
--------------------------------------------------------------------------------
/pom.xml:
--------------------------------------------------------------------------------
1 |
2 |
5 | 4.0.0
6 |
7 | de.fhg.ipa.null70
8 | simple_kafka_mqtt_connector
9 | 0.1.0
10 | jar
11 |
12 |
13 | This application receives messages from a mqtt broker and sends the messages to a kafka cluster.
14 | Topic mapping is configurable.
15 | Keep the mqtt-topic-semantics in mind.
16 | Make sure the kafka topics are created or enable auto.create.topics.enable in your kafka cluster.
17 |
18 |
19 |
20 |
21 | agrg
22 | Arthur Grigorjan
23 | arthur.grigorjan@ipa.fraunhofer.de
24 |
25 |
26 | dkt
27 | Dinh Khoi Tran
28 | dinh.khoi.tran@ipa.fraunhofer.de
29 |
30 |
31 |
32 |
33 |
34 | 1.8
35 | 1.8
36 |
37 |
38 |
39 |
40 |
41 |
42 |
43 | maven-assembly-plugin
44 |
45 |
46 |
47 | de.fhg.ipa.null70.simple_kafka_mqtt_connector.Main
48 |
49 |
50 |
51 | jar-with-dependencies
52 |
53 |
54 |
55 |
56 | make-assembly
57 | install
58 |
59 | single
60 |
61 |
62 |
63 |
64 |
65 |
66 |
67 |
68 |
69 |
70 |
71 |
72 |
73 | commons-configuration
74 | commons-configuration
75 | 1.10
76 |
77 |
78 |
79 |
80 | org.eclipse.paho
81 | org.eclipse.paho.client.mqttv3
82 | 1.2.5
83 |
84 |
85 |
86 |
87 | org.apache.kafka
88 | kafka-clients
89 | 2.8.1
90 |
91 |
92 |
93 | org.apache.kafka
94 | kafka-streams
95 | 2.8.1
96 |
97 |
98 |
99 | org.apache.logging.log4j
100 | log4j-slf4j-impl
101 | 2.17.0
102 |
103 |
104 |
105 |
106 | org.junit.jupiter
107 | junit-jupiter-api
108 | 5.3.1
109 | test
110 |
111 |
112 |
113 | org.junit.jupiter
114 | junit-jupiter-engine
115 | 5.3.1
116 | test
117 |
118 |
119 |
120 | org.junit.jupiter
121 | junit-jupiter-params
122 | 5.3.1
123 | test
124 |
125 |
126 |
127 |
128 |
--------------------------------------------------------------------------------
/simple_kafka_mqtt_connector.iml:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
20 |
21 |
22 |
23 |
24 |
25 |
26 |
27 |
28 |
29 |
30 |
31 |
32 |
33 |
34 |
35 |
36 |
37 |
38 |
39 |
40 |
41 |
42 |
--------------------------------------------------------------------------------
/src/main/java/de/fhg/ipa/null70/simple_kafka_mqtt_connector/Main.java:
--------------------------------------------------------------------------------
1 | package de.fhg.ipa.null70.simple_kafka_mqtt_connector;
2 |
3 | import org.apache.commons.configuration.CompositeConfiguration;
4 | import org.apache.commons.configuration.ConfigurationException;
5 | import org.apache.commons.configuration.PropertiesConfiguration;
6 | import org.apache.commons.configuration.SystemConfiguration;
7 | import org.apache.logging.log4j.LogManager;
8 | import org.apache.logging.log4j.Logger;
9 |
10 | public class Main {
11 |
12 | private static final Logger logger = LogManager.getLogger(Main.class);
13 |
14 | public static void main(String[] args) {
15 | logger.info("######## STARTING THE SIMPLE-KAFKA-MQTT-CONNECTOR ########");
16 | SimpleKafkaMQTTConnector simpleKafkaMQTTConnector = new SimpleKafkaMQTTConnector();
17 |
18 |
19 | // Read application.properties
20 | CompositeConfiguration config = new CompositeConfiguration();
21 | config.addConfiguration(new SystemConfiguration());
22 |
23 | config.addConfiguration(new PropertiesConfiguration());
24 | try {
25 | config.addConfiguration(new PropertiesConfiguration("application.properties"));
26 | } catch (ConfigurationException e) {
27 | e.printStackTrace();
28 | }
29 |
30 | // Properties configuration
31 | String kafkaHost = config.getString("kafka.host");
32 | String kafkaPort = config.getString("kafka.port");
33 | String kafkaClientId = config.getString("kafka.client.id");
34 |
35 | String mqttHost = config.getString("mqtt.host");
36 | String mqttPort = config.getString("mqtt.port");
37 | String mqttClientId = config.getString("mqtt.client.id");
38 | Integer mqttQos = Integer.parseInt(config.getString("mqtt.qos").trim());
39 |
40 | String topicMapping = config.getString("topic.mapping");
41 |
42 | logger.info("-------- APPLICATION PROPERTIES --------");
43 | logger.info("kafkaHost = " + kafkaHost);
44 | logger.info("kafkaPort = " + kafkaPort);
45 | logger.info("mqttHost = " + mqttHost);
46 | logger.info("mqttPort = " + mqttPort);
47 | logger.info("topicMapping = " + topicMapping);
48 | logger.info("----------------------------------------");
49 | logger.info("");
50 |
51 | simpleKafkaMQTTConnector.run(kafkaHost, kafkaPort, kafkaClientId, mqttHost, mqttPort, mqttClientId, mqttQos, topicMapping);
52 | }
53 |
54 | }
55 |
--------------------------------------------------------------------------------
/src/main/java/de/fhg/ipa/null70/simple_kafka_mqtt_connector/SimpleKafkaMQTTConnector.java:
--------------------------------------------------------------------------------
1 | package de.fhg.ipa.null70.simple_kafka_mqtt_connector;
2 |
3 | import java.util.ArrayList;
4 | import java.util.Arrays;
5 | import java.util.HashMap;
6 | import java.util.Map;
7 | import java.util.Properties;
8 |
9 | import org.apache.kafka.clients.producer.KafkaProducer;
10 | import org.apache.kafka.clients.producer.ProducerConfig;
11 | import org.apache.kafka.clients.producer.ProducerRecord;
12 | import org.apache.kafka.common.KafkaException;
13 | import org.apache.kafka.common.serialization.IntegerSerializer;
14 | import org.apache.kafka.common.serialization.StringSerializer;
15 | import org.apache.logging.log4j.LogManager;
16 | import org.apache.logging.log4j.Logger;
17 | import org.eclipse.paho.client.mqttv3.IMqttDeliveryToken;
18 | import org.eclipse.paho.client.mqttv3.MqttCallback;
19 | import org.eclipse.paho.client.mqttv3.MqttClient;
20 | import org.eclipse.paho.client.mqttv3.MqttConnectOptions;
21 | import org.eclipse.paho.client.mqttv3.MqttException;
22 | import org.eclipse.paho.client.mqttv3.MqttMessage;
23 | import org.eclipse.paho.client.mqttv3.MqttTopic;
24 |
25 | public class SimpleKafkaMQTTConnector {
26 | private static final Logger logger = LogManager.getLogger(SimpleKafkaMQTTConnector.class);
27 |
28 | // Key = mqtt-topic input , Value = kafka-topics for output
29 | private static HashMap> mqttKafkaTopicMap = new HashMap();
30 |
31 |
32 | public void run(String kafkaHost, String kafkaPort, String kafkaClientId, String mqttHost, String mqttPort, String mqttClientId, Integer mqttQos, String topicMapping) {
33 | // Initialize topic routing map
34 | initTopicsRoutingMap(topicMapping);
35 |
36 | // Init and start kafka producer
37 | KafkaProducer kafkaProducer = initKafkaProducer(kafkaHost, kafkaPort, kafkaClientId);
38 |
39 | // Setup and start the mqtt client
40 | initMqttClient(mqttHost, mqttPort, mqttClientId, mqttQos, kafkaProducer);
41 | }
42 |
43 | private KafkaProducer initKafkaProducer(String kafkaHost, String kafkaPort, String kafkaClientId) {
44 | logger.trace("Creating Kafka Producer...");
45 | Properties props = new Properties();
46 | props.put(ProducerConfig.CLIENT_ID_CONFIG, kafkaClientId);
47 | props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, kafkaHost + ":" + kafkaPort);
48 | props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, IntegerSerializer.class.getName());
49 | props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class.getName());
50 | KafkaProducer kafkaProducer = new KafkaProducer<>(props);
51 | logger.trace("Kafka producer ready to produce...");
52 | return kafkaProducer;
53 | }
54 |
55 | private HashMap> checkForKey(String mqttTopic)
56 | {
57 | HashMap> keysForWhichTheTopicApplies = new HashMap>();
58 | try{
59 | for (Map.Entry mapElement : mqttKafkaTopicMap.entrySet())
60 | {
61 | String key = (String)mapElement.getKey();
62 | if(MqttTopic.isMatched(key, mqttTopic))
63 | {
64 | keysForWhichTheTopicApplies.put((String)mapElement.getKey(), ( ArrayList)mapElement.getValue());
65 | }
66 | }
67 | }catch(Exception ex)
68 | {
69 | ex.printStackTrace();
70 | }
71 | return keysForWhichTheTopicApplies;
72 | }
73 |
74 | private void initMqttClient(String mqttHost, String mqttPort, String mqttClientId, Integer mqttQos, KafkaProducer kafkaProducer) {
75 |
76 | /***
77 | * MQTT Client
78 | * **/
79 | MqttClient client = null;
80 | try {
81 | client = new MqttClient(
82 | "tcp://" + mqttHost + ":" + mqttPort, mqttClientId);
83 | } catch (MqttException e) {
84 | e.printStackTrace();
85 | }
86 |
87 | MqttConnectOptions options = new MqttConnectOptions();
88 | // use a persistent session..
89 | options.setCleanSession(false);
90 |
91 | options.setWill(
92 | "will/topic", //Topic
93 | "Disconnected!".getBytes(), //Nachrichteninhalt
94 | mqttQos, //QoS
95 | false); //Retained message?
96 |
97 | try {
98 | client.connect(options);
99 | } catch (MqttException e) {
100 | e.printStackTrace();
101 | }
102 |
103 | try {
104 | // Subscribe all configured topics via mqtt
105 | for (Map.Entry mapElement : mqttKafkaTopicMap.entrySet()) {
106 | String key = (String)mapElement.getKey();
107 | client.subscribe(key);
108 | }
109 |
110 | } catch (MqttException e) {
111 | e.printStackTrace();
112 | }
113 |
114 |
115 | client.setCallback(new MqttCallback() {
116 |
117 | @Override
118 | public void connectionLost(Throwable throwable) { }
119 |
120 | @Override
121 | public void messageArrived(String mqttTopic, MqttMessage mqttMessage) throws Exception {
122 | // Checks through which mqtt-topic this message was sent and sends it to the pre-configured corresponding kafka topics..
123 |
124 | String message = new String(mqttMessage.getPayload());
125 | logger.info(mqttTopic + " - " + message);
126 |
127 | try {
128 | HashMap> erg = checkForKey(mqttTopic);
129 | if(erg.size()>=1) {
130 | for (Map.Entry mapElement : erg.entrySet()) {
131 | ((ArrayList)mapElement.getValue()).forEach(kafkaTopic -> {
132 | kafkaProducer.send(new ProducerRecord<>(kafkaTopic, message));
133 | });
134 | logger.trace("send Message to kafka - " + message);
135 | }
136 | }
137 | } catch (KafkaException e) {
138 | logger.error("Exception occurred – Check log for more details.\n" + e.getMessage());
139 | logger.warn("There seems to be an issue with the kafka connection. Currently no messages are forwarded to the kafka cluster!!!!");
140 | // System.exit(-1);
141 | }
142 |
143 | }
144 |
145 | @Override
146 | public void deliveryComplete(IMqttDeliveryToken t) { }
147 | });
148 | }
149 |
150 | public static void initTopicsRoutingMap(String topicMappingString){
151 | logger.info("Setting up topic mapping (MQTT >>> Kafka) ...");
152 | Arrays.asList(topicMappingString.split(";")).forEach(s -> {
153 | String[] pair = s.split(">>>");
154 | String mqttTopic = pair[0];
155 | String kafkaTopic = pair[1];
156 | if( !mqttKafkaTopicMap.containsKey(mqttTopic) ){
157 | mqttKafkaTopicMap.put(mqttTopic, new ArrayList());
158 | }
159 | mqttKafkaTopicMap.get(mqttTopic).add(kafkaTopic);
160 | logger.info(mqttTopic + " >>> " + kafkaTopic);
161 | }
162 | );
163 | }
164 |
165 | }
166 |
--------------------------------------------------------------------------------
/src/main/resources/application.properties:
--------------------------------------------------------------------------------
1 | kafka.host=192.168.56.102
2 | #kafka.host=localhost
3 |
4 | kafka.port=9092
5 | kafka.client.id=testing-kafka-producer-1
6 |
7 | mqtt.host=192.168.56.102
8 | #mqtt.host=localhost
9 | mqtt.port=1883
10 | mqtt.client.id=mqtt-client-1
11 | mqtt.qos=2
12 |
13 | topic.mapping=robotgroup001/robot001>>>test;robotgroup001/robot002>>>test02;robotgroup001/robot003>>>test03
14 |
15 |
--------------------------------------------------------------------------------
/src/main/resources/log4j2.xml:
--------------------------------------------------------------------------------
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
13 |
14 |
15 |
16 |
17 |
18 |
19 |
--------------------------------------------------------------------------------