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|  | HTTP Adapter Configuration | 
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|  | AMQP Adapter Configuration | 
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|  | MQTT Adapter Configuration | 
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|  | Kura Adapter Configuration | 
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|  | Hono Client Configuration | 
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|  | <li data-nav-id="/hono/docs/1.2/admin-guide/amqp-network-config/" title="AMQP 1.0 Messaging Network Configuration" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/admin-guide/amqp-network-config/"> | 
|  | AMQP 1.0 Messaging Network Configuration | 
|  |  | 
|  | </a> | 
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|  | <li data-nav-id="/hono/docs/1.2/admin-guide/secure_communication/" title="Secure Communication" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/admin-guide/secure_communication/"> | 
|  | Secure Communication | 
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|  | </a> | 
|  | </li> | 
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|  | <li data-nav-id="/hono/docs/1.2/admin-guide/monitoring-tracing-config/" title="Monitoring & Tracing" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/admin-guide/monitoring-tracing-config/"> | 
|  | Monitoring & Tracing | 
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|  | </a> | 
|  | </li> | 
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|  | </ul> | 
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|  | <li data-nav-id="/hono/docs/1.2/dev-guide/" title="Developer Guide" class="dd-item | 
|  | parent | 
|  |  | 
|  |  | 
|  | "> | 
|  | <a href="/hono/docs/1.2/dev-guide/"> | 
|  | <i class="fas fa-tools"></i> Developer Guide | 
|  |  | 
|  | </a> | 
|  |  | 
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|  | <ul> | 
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|  | <li data-nav-id="/hono/docs/1.2/dev-guide/building_hono/" title="Building from Source" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/dev-guide/building_hono/"> | 
|  | Building from Source | 
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|  | </a> | 
|  | </li> | 
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|  | <li data-nav-id="/hono/docs/1.2/dev-guide/amqp_adapter_client/" title="AMQP Adapter Client for Java" class="dd-item active"> | 
|  | <a href="/hono/docs/1.2/dev-guide/amqp_adapter_client/"> | 
|  | AMQP Adapter Client for Java | 
|  |  | 
|  | </a> | 
|  | </li> | 
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|  | <li data-nav-id="/hono/docs/1.2/dev-guide/java_client_consumer/" title="Consuming Messages from Java" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/dev-guide/java_client_consumer/"> | 
|  | Consuming Messages from Java | 
|  |  | 
|  | </a> | 
|  | </li> | 
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|  | <li data-nav-id="/hono/docs/1.2/dev-guide/custom_http_adapter/" title="Implement a Custom Hono HTTP Protocol Adapter" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/dev-guide/custom_http_adapter/"> | 
|  | Implement a Custom Hono HTTP Protocol Adapter | 
|  |  | 
|  | </a> | 
|  | </li> | 
|  |  | 
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|  | </ul> | 
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|  | <li data-nav-id="/hono/docs/1.2/api/" title="API" class="dd-item | 
|  |  | 
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|  | "> | 
|  | <a href="/hono/docs/1.2/api/"> | 
|  |  <i class='fas fa-plug'></i> API | 
|  |  | 
|  | </a> | 
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|  | <ul> | 
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|  | <li data-nav-id="/hono/docs/1.2/api/telemetry/" title="Telemetry API Specification" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/api/telemetry/"> | 
|  | Telemetry API | 
|  |  | 
|  | </a> | 
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|  | <li data-nav-id="/hono/docs/1.2/api/event/" title="Event API Specification" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/api/event/"> | 
|  | Event API | 
|  |  | 
|  | </a> | 
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|  | <li data-nav-id="/hono/docs/1.2/api/command-and-control/" title="Command & Control API Specification" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/api/command-and-control/"> | 
|  | Command & Control API | 
|  |  | 
|  | </a> | 
|  | </li> | 
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|  | <li data-nav-id="/hono/docs/1.2/api/tenant/" title="Tenant API Specification" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/api/tenant/"> | 
|  | Tenant API | 
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|  | </a> | 
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|  | <li data-nav-id="/hono/docs/1.2/api/device-connection/" title="Device Connection API Specification" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/api/device-connection/"> | 
|  | Device Connection API | 
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|  | <li data-nav-id="/hono/docs/1.2/api/device-registration/" title="Device Registration API Specification" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/api/device-registration/"> | 
|  | Device Registration API | 
|  |  | 
|  | </a> | 
|  | </li> | 
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|  | <li data-nav-id="/hono/docs/1.2/api/credentials/" title="Credentials API Specification" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/api/credentials/"> | 
|  | Credentials API | 
|  |  | 
|  | </a> | 
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|  | <li data-nav-id="/hono/docs/1.2/api/authentication/" title="Authentication API Specification" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/api/authentication/"> | 
|  | Authentication API | 
|  |  | 
|  | </a> | 
|  | </li> | 
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|  | <li data-nav-id="/hono/docs/1.2/api/management/" title="Device Registry Management API Specification" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/api/management/"> | 
|  | Device Registry Management API | 
|  |  | 
|  | </a> | 
|  | </li> | 
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|  | <li data-nav-id="/hono/docs/1.2/api/metrics/" title="Metrics" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/api/metrics/"> | 
|  | Metrics | 
|  |  | 
|  | </a> | 
|  | </li> | 
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|  | </ul> | 
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|  | <li data-nav-id="/hono/docs/1.2/deployment/" title="Deployment" class="dd-item | 
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|  | "> | 
|  | <a href="/hono/docs/1.2/deployment/"> | 
|  | <i class="fas fa-shipping-fast"></i> Deployment | 
|  |  | 
|  | </a> | 
|  |  | 
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|  | <ul> | 
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|  | <li data-nav-id="/hono/docs/1.2/deployment/helm-based-deployment/" title="Helm based Deployment" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/deployment/helm-based-deployment/"> | 
|  | Helm based Deployment | 
|  |  | 
|  | </a> | 
|  | </li> | 
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|  | <li data-nav-id="/hono/docs/1.2/deployment/openshift/" title="OpenShift / OKD" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/deployment/openshift/"> | 
|  | OpenShift / OKD | 
|  |  | 
|  | </a> | 
|  | </li> | 
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|  | <li data-nav-id="/hono/docs/1.2/deployment/create-kubernetes-cluster/" title="Setting up a Kubernetes Cluster" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/deployment/create-kubernetes-cluster/"> | 
|  | Setting up a Kubernetes Cluster | 
|  |  | 
|  | </a> | 
|  | </li> | 
|  |  | 
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|  | <li data-nav-id="/hono/docs/1.2/deployment/resource-limitation/" title="Limiting Resource Usage" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/deployment/resource-limitation/"> | 
|  | Limiting Resource Usage | 
|  |  | 
|  | </a> | 
|  | </li> | 
|  |  | 
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|  | <li data-nav-id="/hono/docs/1.2/architecture/" title="Architecture" class="dd-item | 
|  |  | 
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|  | "> | 
|  | <a href="/hono/docs/1.2/architecture/"> | 
|  | <i class="fas fa-landmark"></i> Architecture | 
|  |  | 
|  | </a> | 
|  |  | 
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|  | <ul> | 
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|  | <li data-nav-id="/hono/docs/1.2/architecture/component-view/" title="Component View" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/architecture/component-view/"> | 
|  | Component View | 
|  |  | 
|  | </a> | 
|  | </li> | 
|  |  | 
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|  | <li data-nav-id="/hono/docs/1.2/architecture/auth/" title="Authentication/Authorization" class="dd-item "> | 
|  | <a href="/hono/docs/1.2/architecture/auth/"> | 
|  | Authentication/Authorization | 
|  |  | 
|  | </a> | 
|  | </li> | 
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|  | </ul> | 
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|  | </ul> | 
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|  |  | 
|  |  | 
|  | <section id="shortcuts"> | 
|  | <h3></h3> | 
|  | <ul> | 
|  |  | 
|  | <li> | 
|  | <a class="padding" href="https://www.eclipse.org/hono/" title="Hono's Homepage"><i class='fas fa-home'></i> Hono Home</a> | 
|  | </li> | 
|  |  | 
|  | <li> | 
|  | <a class="padding" href="https://www.eclipse.org/hono/getting-started/" title="Getting started with Eclipse Hono"><i class='fas fa-plane-departure'></i> Getting Started</a> | 
|  | </li> | 
|  |  | 
|  | </ul> | 
|  | </section> | 
|  |  | 
|  |  | 
|  |  | 
|  | <section id="prefooter"> | 
|  | <hr/> | 
|  | <ul> | 
|  |  | 
|  | <li> | 
|  | <div id="select-box-wrapper"> | 
|  | <div id="select-box"> | 
|  | <a class="padding"> | 
|  | Version:  | 
|  | <div class="select-style"> | 
|  | <select id="select-language" onchange="location = this.value;"> | 
|  |  | 
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|  | <option id="stable" value="https://www.eclipse.org/hono/docs/dev-guide/amqp_adapter_client/">stable (1.7)</option> | 
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|  | <option id="1.7" value="https://www.eclipse.org/hono/docs/1.7/dev-guide/amqp_adapter_client/">1.7</option> | 
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|  | <option id="1.6" value="https://www.eclipse.org/hono/docs/1.6/dev-guide/amqp_adapter_client/">1.6</option> | 
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|  | <option id="1.5" value="https://www.eclipse.org/hono/docs/1.5/dev-guide/amqp_adapter_client/">1.5</option> | 
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|  | <option id="1.4" value="https://www.eclipse.org/hono/docs/1.4/dev-guide/amqp_adapter_client/">1.4</option> | 
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|  | <option id="1.3" value="https://www.eclipse.org/hono/docs/1.3/dev-guide/amqp_adapter_client/">1.3</option> | 
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|  | <a href='/hono/docs/1.2/'>Documentation</a> > <a href='/hono/docs/1.2/dev-guide/'>Developer Guide</a> > AMQP Adapter Client for Java | 
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|  | <li><a href="#usage-in-a-gateway">Usage in a Gateway</a></li> | 
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|  | AMQP Adapter Client for Java | 
|  | </h1> | 
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|  | <p>Eclipse Honoâ„¢ comes with a Java client for the AMQP adapter. It is intended for the implementation of | 
|  | (prototype) devices, (protocol) gateways or (end-to-end) tests. The client is based on Eclipse Vert.x.</p> | 
|  | <p>The starting point is the class <code>AmqpAdapterClientFactory</code>.</p> | 
|  | <p>The factory provides methods to get a receiver for receiving commands and a sender for each of the following actions:</p> | 
|  | <ul> | 
|  | <li>send a telemetry message</li> | 
|  | <li>send an event message</li> | 
|  | <li>send a response to a previously received command</li> | 
|  | </ul> | 
|  | <div class="alert alert-notice"> | 
|  | <h4 class="alert-heading"><i class="fas fa-info-circle"></i> Do not re-use sender instances</h4> | 
|  | <div>The senders manage the underlying AMQP sender links, which are restored after temporary interruption of the connection | 
|  | (<code>HonoConnection</code> manages the automatic reconnection). To achieve this, a caching mechanism is used, so that | 
|  | defective links are replaced by new ones. The sender must be always retrieved from the factory when sending | 
|  | because otherwise the link might no longer exist. | 
|  | So, do not hold references to sender objects and re-use them for subsequent send operations!</div> | 
|  | </div> | 
|  | <p>For examples of how to use the client, see the example implementation in the <code>AmqpExampleDevice</code> class.</p> | 
|  | <h2 id="usage-in-a-gateway">Usage in a Gateway</h2> | 
|  | <p>There are two ways to subscribe to commands for use in a gateway:</p> | 
|  | <ol> | 
|  | <li>Gateway subscribing for commands for a specific device: | 
|  | The gateway subscribes individually for each connected device by creating a command consumer for the specific device.</li> | 
|  | <li>Gateway subscribing for commands for all its devices: | 
|  | The gateway subscribes for commands sent to all the different devices that the gateway acts on behalf of by | 
|  | creating a command consumer that is not scoped on a specific device.</li> | 
|  | </ol> | 
|  | <p>Subscribing for all devices does not work if multiple instances of the gateway are running at the same time, | 
|  | because a command is only sent to one receiver, and this may be an instance that has no connection to the device. | 
|  | On the other hand, subscribing for a specific device once it connects to the gateway instance | 
|  | (and closing the subscription once it disconnects) may not work for device-oriented protocols that are not connection-based.</p> | 
|  | <h2 id="tracing">Tracing</h2> | 
|  | <p>The AMQP Adapter Client supports tracing of the messages with <a href="https://opentracing.io/">OpenTracing</a>. To use tracing, each of the | 
|  | senders returned by the factory can be cast to an interface with the same name and the prefix “Traceable” | 
|  | (e.g. cast <code>TelemetrySender</code> to <code>TraceableTelemetrySender</code>). | 
|  | The traceable interfaces provide <em>send</em> methods with an additional <code>SpanContext</code> parameter.</p> | 
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