Apache Camel: First IOTA Component Example

INTRODUCTION

I am proud to comunicate that Apache Camel since version 2.24 will support IOTA DLT Component (I'm the author)

Apache Camel is a open source implementation of famous Enterprise Integration Patterns. Camel is a Routing and Mediation Engine and facilitates the developers to create routes and mediation rules in variety of Domain Specific language(DSL) such as java, Spring/XML, Scala etc.

TUTORIAL

Into this blog article i will explain how to create a simple project to send data from MQTT to IOTA Tangle!

Create java project

To create java project you can use maven archetypes

mvn archetype:generate -DarchetypeGroupId=org.apache.camel.archetypes \
  -DarchetypeArtifactId=camel-archetype-spring -DarchetypeVersion=2.22.0 \
  -DarchetypeRepository=https://repository.apache.org/content/groups/snapshots-group

Inside the folder src/main/resources/META-INF/spring can find the main file camel-context.xml

POM dependencies

<dependency>
     <groupId>org.apache.camel</groupId>
     <artifactId>camel-mqtt</artifactId>
</dependency>

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-iota</artifactId>
</dependency>

Note: You must upgrade camel version form 2.22.0 to 2.24.0-SNAPSHOT

Write the code

Now is let time to edit the file to write data to the tangle

<route>
    <from uri="mqtt://test?host=tcp://test.mosquitto.org:1883&amp;subscribeTopicName=fabryprog-iota/test"/>
    <setHeader headerName="CamelIOTASeed">
        <constant>9HIAWQJHGOPQVPWNCLKNVVMZZCUJXGUXYGJQNVXMWWUWXZUVQDBVAWBEGBPHWMXSYECPGZMJMNYHLQMVN</constant>
    </setHeader>
    <setHeader headerName="CamelIOTAValue">
        <constant>0</constant>
    </setHeader>
    <setHeader headerName="CamelIOTAToAddress">
       <constant>LXQHWNY9CQOHPNMKFJFIJHGEPAENAOVFRDIBF99PPHDTWJDCGHLYETXT9NPUVSNKT9XDTDYNJKJCPQMZCCOZVXMTXC</constant>
    </setHeader>
    <to uri="iota://fabryprog-iota?url=https://nodes.thetangle.org:443&amp;tag=APACHECAMELIOTA&amp;operation=sendTransfer&amp;depth=3" />
 </route>

Now, open terminal and launch the command to camel run

 mvn clean camel:run

(terminal output)

Send MQTT data

You can send data to mqtt server using a common mqtt client

I use mosquitto-client:

 mosquitto_pub -h test.mosquitto.org -t fabryprog-iota/test -m "First Apache Camel Iota Example"

Now you can find my transaction test using tangle explorer (link)

Have fun with Apache Camel IOTA!

GitHub Repo

Apache Camel Official Documentation