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| <ul> |
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| <div class="post-header"> |
| <h1 class="post-title-main">MQTT 3.1.1 protocol binding</h1> |
| </div> |
| |
| |
| |
| <div class="post-content"> |
| |
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| |
| <p>Consume messages from MQTT brokers via <a href="#source-format">sources</a> and send messages to MQTT brokers via |
| <a href="#target-format">targets</a>.</p> |
| |
| <h2 id="content-type">Content-type</h2> |
| |
| <p>When MQTT messages are sent in <a href="protocol-overview.html">Ditto Protocol</a>, |
| the payload should be <code class="highlighter-rouge">UTF-8</code> encoded strings.</p> |
| |
| <p>If messages, which are not in Ditto Protocol, should be processed, a <a href="connectivity-mapping.html">payload mapping</a> must |
| be configured for the connection in order to transform the messages.</p> |
| |
| <h2 id="mqtt-311-properties">MQTT 3.1.1 properties</h2> |
| |
| <p>MQTT 3.1.1 messages have no application headers. Transmission-relevant properties are set in the |
| <code class="highlighter-rouge">"headers"</code> field as a part of <a href="protocol-specification.html#dittoProtocolEnvelope">Ditto protocol messages</a> in the |
| payload.</p> |
| |
| <p>This property is supported:</p> |
| |
| <ul> |
| <li><code class="highlighter-rouge">correlation-id</code>: For correlating request messages and events. Twin events have the correlation IDs of |
| <a href="protocol-twinlive.html#twin">Twin commands</a> that produced them.</li> |
| </ul> |
| |
| <h2 id="specific-connection-configuration">Specific connection configuration</h2> |
| |
| <p>The common configuration for connections in <a href="basic-connections.html#sources">Connections > Sources</a> and |
| <a href="basic-connections.html#targets">Connections > Targets</a> applies here as well.</p> |
| |
| <p>Following are some specifics for MQTT connections:</p> |
| |
| <h3 id="source-format">Source format</h3> |
| |
| <p>For an MQTT connection:</p> |
| |
| <ul> |
| <li>Source <code class="highlighter-rouge">"addresses"</code> are MQTT topics to subscribe to. Wildcards <code class="highlighter-rouge">+</code> and <code class="highlighter-rouge">#</code> are allowed.</li> |
| <li><code class="highlighter-rouge">"authorizationContext"</code> may <em>not</em> contain placeholders <code class="highlighter-rouge">{{ header:<header-name> }}</code> as MQTT 3.1.1 |
| has no application headers.</li> |
| <li>The optional field <code class="highlighter-rouge">"qos"</code> sets the maximum Quality of Service to request when subscribing for messages. Its value |
| can be <code class="highlighter-rouge">0</code> for at-most-once delivery, <code class="highlighter-rouge">1</code> for at-least-once delivery and <code class="highlighter-rouge">2</code> for exactly-once delivery. |
| The default value is <code class="highlighter-rouge">2</code> (exactly-once). |
| Support of any Quality of Service depends on the external MQTT broker; <a href="https://docs.aws.amazon.com/iot/">AWS IoT</a> for example does not |
| acknowledge subscriptions with <code class="highlighter-rouge">qos=2</code>.</li> |
| </ul> |
| |
| <div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w"> |
| </span><span class="s2">"addresses"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> |
| </span><span class="s2">"<mqtt_topic>"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"..."</span><span class="w"> |
| </span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"authorizationContext"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">"ditto:inbound-auth-subject"</span><span class="p">,</span><span class="w"> </span><span class="s2">"..."</span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"qos"</span><span class="p">:</span><span class="w"> </span><span class="mi">2</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span></code></pre></div></div> |
| |
| <p>Note: This example assumes that there is a valid user named <code class="highlighter-rouge">ditto:inbound-auth-subject</code> in Ditto. |
| If you want to use a user for the basic auth (from the <a href="connectivity-protocol-bindings-http.html">HTTP API</a>) use the prefix <code class="highlighter-rouge">nginx:</code>, e.g. <code class="highlighter-rouge">nginx:ditto</code>. |
| See <a href="basic-auth.html#authorization-context-in-devops-commands">Basic Authentication</a> for more information.</p> |
| |
| <h4 id="source-header-mapping">Source header mapping</h4> |
| |
| <p>MQTT 3.1.1 does not support headers in its protocol, however Ditto extracts the following headers from each consumed message:</p> |
| <ul> |
| <li><code class="highlighter-rouge">mqtt.topic</code>: contains the MQTT topic on which a message was received</li> |
| <li><code class="highlighter-rouge">mqtt.qos</code>: contains the MQTT QoS value of a received message</li> |
| <li><code class="highlighter-rouge">mqtt.retain</code>: contains the MQTT retain flag of a received message</li> |
| </ul> |
| |
| <p>These headers may be used in a source header mapping, e.g.:</p> |
| <div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w"> |
| </span><span class="s2">"headerMapping"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"topic"</span><span class="p">:</span><span class="w"> </span><span class="s2">"{{ header:mqtt.topic }}"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"the-qos"</span><span class="p">:</span><span class="w"> </span><span class="s2">"{{ header:mqtt.qos }}"</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span></code></pre></div></div> |
| |
| <h4 id="source-acknowledgement-handling">Source acknowledgement handling</h4> |
| |
| <p>For MQTT 3.1.1 sources, when configuring |
| <a href="basic-connections.html#source-acknowledgement-requests">acknowledgement requests</a>, consumed messages from the MQTT 3.1.1 |
| broker are treated in the following way:</p> |
| |
| <p>For Ditto acknowledgements with successful <a href="protocol-specification-acks.html#combined-status-code">status</a>:</p> |
| <ul> |
| <li>Acknowledges the received MQTT 3.1.1 message</li> |
| </ul> |
| |
| <p>For Ditto acknowledgements with mixed successful/failed <a href="protocol-specification-acks.html#combined-status-code">status</a>:</p> |
| <ul> |
| <li>If some of the aggregated <a href="basic-acknowledgements.html#acknowledgements-acks">acknowledgements</a> require redelivery (e.g. based on a timeout): |
| <ul> |
| <li>based on the <a href="#specific-configuration">specificConfig</a> <a href="#reconnectforredelivery">reconnectForDelivery</a> either |
| <ul> |
| <li>closes and reconnects the MQTT connection in order to receive unACKed QoS 1/2 messages again</li> |
| <li>or simply acknowledges the received MQTT 3.1.1 message</li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| <li>If none of the aggregated <a href="basic-acknowledgements.html#acknowledgements-acks">acknowledgements</a> require redelivery: |
| <ul> |
| <li>acknowledges the received MQTT 3.1.1 message as redelivery does not make sense</li> |
| </ul> |
| </li> |
| </ul> |
| |
| <h3 id="target-format">Target format</h3> |
| |
| <p>For an MQTT connection, the target address is the MQTT topic to publish events and messages to. |
| The target address may contain placeholders; see |
| <a href="basic-connections.html#placeholder-for-target-addresses">placeholders</a> section for more information.</p> |
| |
| <p>Further, <code class="highlighter-rouge">"topics"</code> is a list of strings, each list entry representing a subscription of |
| <a href="protocol-specification-topic.html">Ditto protocol topics</a>.</p> |
| |
| <p>Outbound messages are published to the configured target address if one of the subjects in <code class="highlighter-rouge">"authorizationContext"</code> |
| has READ permission on the thing, which is associated with a message.</p> |
| |
| <p>The additional field <code class="highlighter-rouge">"qos"</code> sets the Quality of Service with which messages are published. |
| Its value can be <code class="highlighter-rouge">0</code> for at-most-once delivery, <code class="highlighter-rouge">1</code> for at-least-once delivery and <code class="highlighter-rouge">2</code> for exactly-once delivery. |
| Support of any Quality of Service depends on the external MQTT broker. |
| The default value is <code class="highlighter-rouge">0</code> (at-most-once).</p> |
| |
| <div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w"> |
| </span><span class="s2">"address"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mqtt/topic/of/my/device/{{ thing:id }}"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"topics"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> |
| </span><span class="s2">"_/_/things/twin/events"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"_/_/things/live/messages"</span><span class="w"> |
| </span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"authorizationContext"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">"ditto:outbound-auth-subject"</span><span class="p">,</span><span class="w"> </span><span class="s2">"..."</span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"qos"</span><span class="p">:</span><span class="w"> </span><span class="mi">0</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span></code></pre></div></div> |
| |
| <h4 id="target-header-mapping">Target header mapping</h4> |
| |
| <p>As MQTT 3.1.1 does not support headers in its protocol, a <a href="connectivity-header-mapping.html">header mapping</a> is not possible to configure here.</p> |
| |
| <h4 id="target-acknowledgement-handling">Target acknowledgement handling</h4> |
| |
| <p>For MQTT 3.1.1 targets, when configuring |
| <a href="basic-connections.html#target-issued-acknowledgement-label">automatically issued acknowledgement labels</a>, requested |
| acknowledgements are produced in the following way:</p> |
| |
| <p>Once the MQTT 3.1.1 client signals that the message was acknowledged by the MQTT 3.1.1 broker, the following information |
| is mapped to the automatically created <a href="protocol-specification-acks.html#acknowledgement">acknowledgement</a>:</p> |
| <ul> |
| <li>Acknowledgement.status: |
| <ul> |
| <li>will be <code class="highlighter-rouge">200</code>, if the message was successfully ACKed by the MQTT 3.1.1 broker or when the target has QoS 0</li> |
| <li>will be <code class="highlighter-rouge">503</code>, if the MQTT 3.1.1 broker ran into an error before an acknowledgement message was received</li> |
| </ul> |
| </li> |
| <li>Acknowledgement.value: |
| <ul> |
| <li>will be missing, for status <code class="highlighter-rouge">200</code></li> |
| <li>will contain more information, in case that an error <code class="highlighter-rouge">status</code> was set</li> |
| </ul> |
| </li> |
| </ul> |
| |
| <h3 id="specific-configuration">Specific Configuration</h3> |
| |
| <p>The MQTT 3.1.1 binding offers additional <a href="basic-connections.html#specific-configuration">specific configurations</a> |
| to apply for the used MQTT client.</p> |
| |
| <p>Overall example JSON of the MQTT <code class="highlighter-rouge">"specificConfig"</code>:</p> |
| <div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w"> |
| </span><span class="s2">"id"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mqtt-example-connection-123"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"connectionType"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mqtt"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"connectionStatus"</span><span class="p">:</span><span class="w"> </span><span class="s2">"open"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"failoverEnabled"</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"uri"</span><span class="p">:</span><span class="w"> </span><span class="s2">"tcp://test.mosquitto.org:1883"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"specificConfig"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"clientId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"my-awesome-mqtt-client-id"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"reconnectForRedelivery"</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"cleanSession"</span><span class="p">:</span><span class="w"> </span><span class="kc">false</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"separatePublisherClient"</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"publisherId"</span><span class="p">:</span><span class="w"> </span><span class="s2">"my-awesome-mqtt-publisher-client-id"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"reconnectForRedeliveryDelay"</span><span class="p">:</span><span class="w"> </span><span class="s2">"5s"</span><span class="w"> |
| </span><span class="p">},</span><span class="w"> |
| </span><span class="s2">"sources"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">"..."</span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"targets"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">"..."</span><span class="p">]</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span></code></pre></div></div> |
| |
| <h4 id="clientid">clientId</h4> |
| |
| <p>Overwrites the default MQTT client id.</p> |
| |
| <p>Default: not set - the ID of the Ditto <a href="basic-connections.html">connection</a> is used as MQTT client ID.</p> |
| |
| <h4 id="reconnectforredelivery">reconnectForRedelivery</h4> |
| |
| <p>Configures that the MQTT connection re-connects whenever a consumed message (via a connection source) with QoS 1 |
| (“at least once”) or 2 (“exactly once”) |
| is processed but cannot be <a href="#source-acknowledgement-handling">acknowledged</a> successfully.<br /> |
| That causes that the MQTT broker will re-publish the message once the connection reconnected. <br /> |
| If configured to <code class="highlighter-rouge">false</code>, the MQTT message is simply acknowledged (<code class="highlighter-rouge">PUBACK</code> or <code class="highlighter-rouge">PUBREC</code>, <code class="highlighter-rouge">PUBREL</code>).</p> |
| |
| <p>Default: <code class="highlighter-rouge">true</code></p> |
| |
| <p>Handle with care:</p> |
| <ul> |
| <li>when set to <code class="highlighter-rouge">true</code>, incoming QoS 0 messages are lost during the reconnection phase</li> |
| <li>when set to <code class="highlighter-rouge">true</code> and there is also an MQTT target configured to publish messages, |
| the messages to be published during the reconnection phase are lost |
| <ul> |
| <li>to fix that, configure <code class="highlighter-rouge">"separatePublisherClient"</code> also to <code class="highlighter-rouge">true</code> in order to publish via another MQTT connection</li> |
| </ul> |
| </li> |
| <li>when set to <code class="highlighter-rouge">false</code>, MQTT messages with QoS 1 and 2 could get lost (e.g. during downtime or connection issues)</li> |
| </ul> |
| |
| <h4 id="cleansession">cleanSession</h4> |
| |
| <p>Configure the MQTT client’s <code class="highlighter-rouge">cleanSession</code> flag.</p> |
| |
| <p>Default: the negation of <code class="highlighter-rouge">"reconnectForRedelivery"</code></p> |
| |
| <h4 id="separatepublisherclient">separatePublisherClient</h4> |
| |
| <p>Configures whether to create a separate physical client and connection to the MQTT broker for publishing messages, or not. |
| By default (configured true), a single Ditto connection would open 2 MQTT connections/sessions: one for subscribing and one for publishing. |
| If configured to <code class="highlighter-rouge">false</code>, the same MQTT connection/session is used both: for subscribing to messages, and for |
| publishing messages.</p> |
| |
| <p>Default: <code class="highlighter-rouge">true</code></p> |
| |
| <h4 id="publisherid">publisherId</h4> |
| |
| <p>Configures a specific MQTT client ID for the case that <code class="highlighter-rouge">"separatePublisherClient"</code> is enabled.</p> |
| |
| <p>Default:</p> |
| <ul> |
| <li>if client ID is configured, <code class="highlighter-rouge">clientId</code> + <code class="highlighter-rouge">"p"</code></li> |
| <li>if no client ID is configured, <code class="highlighter-rouge">connectionId</code> + <code class="highlighter-rouge">"p"</code></li> |
| </ul> |
| |
| <h4 id="reconnectforredeliverydelay">reconnectForRedeliveryDelay</h4> |
| |
| <p>Configures how long to wait before reconnecting a consumer client for redelivery when <code class="highlighter-rouge">"reconnectForRedelivery"</code> |
| and <code class="highlighter-rouge">separatePublisherClient</code> are both enabled. The minimum value is <code class="highlighter-rouge">1s</code>.</p> |
| |
| <p>Default: <code class="highlighter-rouge">2s</code></p> |
| |
| <h2 id="establishing-a-connection-to-an-mqtt-311-endpoint">Establishing a connection to an MQTT 3.1.1 endpoint</h2> |
| |
| <p>Ditto’s <a href="architecture-services-connectivity.html">Connectivity service</a> is responsible for creating new and managing |
| existing connections.</p> |
| |
| <p>This can be done dynamically at runtime without the need to restart any microservice using a |
| <a href="installation-operating.html#devops-commands">Ditto DevOps command</a>.</p> |
| |
| <p>Example:</p> |
| |
| <p>Connection configuration to create a new MQTT connection:</p> |
| |
| <div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w"> |
| </span><span class="s2">"id"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mqtt-example-connection-123"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"connectionType"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mqtt"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"connectionStatus"</span><span class="p">:</span><span class="w"> </span><span class="s2">"open"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"failoverEnabled"</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"uri"</span><span class="p">:</span><span class="w"> </span><span class="s2">"tcp://test.mosquitto.org:1883"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"sources"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> |
| </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"addresses"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> |
| </span><span class="s2">"eclipse-ditto-sandbox/#"</span><span class="w"> |
| </span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"authorizationContext"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">"ditto:inbound-auth-subject"</span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"qos"</span><span class="p">:</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"filters"</span><span class="p">:</span><span class="w"> </span><span class="p">[]</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"targets"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> |
| </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"address"</span><span class="p">:</span><span class="w"> </span><span class="s2">"eclipse-ditto-sandbox/{{ thing:id }}"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"topics"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> |
| </span><span class="s2">"_/_/things/twin/events"</span><span class="w"> |
| </span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"authorizationContext"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">"ditto:outbound-auth-subject"</span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"qos"</span><span class="p">:</span><span class="w"> </span><span class="mi">0</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">]</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span></code></pre></div></div> |
| |
| <h2 id="client-certificate-authentication">Client-certificate authentication</h2> |
| |
| <p>Ditto supports certificate-based authentication for MQTT connections. Consult |
| <a href="connectivity-tls-certificates.html">Certificates for Transport Layer Security</a> |
| for how to set it up.</p> |
| |
| <p>Here is an example MQTT connection, which checks the broker certificate and authenticates by a client certificate.</p> |
| |
| <div class="language-json highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">{</span><span class="w"> |
| </span><span class="s2">"id"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mqtt-example-connection-124"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"connectionType"</span><span class="p">:</span><span class="w"> </span><span class="s2">"mqtt"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"connectionStatus"</span><span class="p">:</span><span class="w"> </span><span class="s2">"open"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"failoverEnabled"</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"uri"</span><span class="p">:</span><span class="w"> </span><span class="s2">"ssl://test.mosquitto.org:8884"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"validateCertificates"</span><span class="p">:</span><span class="w"> </span><span class="kc">true</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"ca"</span><span class="p">:</span><span class="w"> </span><span class="s2">"-----BEGIN CERTIFICATE-----</span><span class="se">\n</span><span class="s2"><test.mosquitto.org certificate></span><span class="se">\n</span><span class="s2">-----END CERTIFICATE-----"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"credentials"</span><span class="p">:</span><span class="w"> </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"type"</span><span class="p">:</span><span class="w"> </span><span class="s2">"client-cert"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"cert"</span><span class="p">:</span><span class="w"> </span><span class="s2">"-----BEGIN CERTIFICATE-----</span><span class="se">\n</span><span class="s2"><signed client certificate></span><span class="se">\n</span><span class="s2">-----END CERTIFICATE-----"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"key"</span><span class="p">:</span><span class="w"> </span><span class="s2">"-----BEGIN PRIVATE KEY-----</span><span class="se">\n</span><span class="s2"><client private key></span><span class="se">\n</span><span class="s2">-----END PRIVATE KEY-----"</span><span class="w"> |
| </span><span class="p">},</span><span class="w"> |
| </span><span class="s2">"sources"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> |
| </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"addresses"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> |
| </span><span class="s2">"eclipse-ditto-sandbox/#"</span><span class="w"> |
| </span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"authorizationContext"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">"ditto:inbound-auth-subject"</span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"qos"</span><span class="p">:</span><span class="w"> </span><span class="mi">0</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"filters"</span><span class="p">:</span><span class="w"> </span><span class="p">[]</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"targets"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> |
| </span><span class="p">{</span><span class="w"> |
| </span><span class="s2">"address"</span><span class="p">:</span><span class="w"> </span><span class="s2">"eclipse-ditto-sandbox/{{ thing:id }}"</span><span class="p">,</span><span class="w"> |
| </span><span class="s2">"topics"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="w"> |
| </span><span class="s2">"_/_/things/twin/events"</span><span class="w"> |
| </span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"authorizationContext"</span><span class="p">:</span><span class="w"> </span><span class="p">[</span><span class="s2">"ditto:outbound-auth-subject"</span><span class="p">],</span><span class="w"> |
| </span><span class="s2">"qos"</span><span class="p">:</span><span class="w"> </span><span class="mi">0</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span><span class="p">]</span><span class="w"> |
| </span><span class="p">}</span><span class="w"> |
| </span></code></pre></div></div> |
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