Publishing from 0d53ccdd4d30507741a1ae45b51f876ef9b8e915
Project: http://git-wip-us.apache.org/repos/asf/bahir-website/repo Commit: http://git-wip-us.apache.org/repos/asf/bahir-website/commit/b20a1c1c Tree: http://git-wip-us.apache.org/repos/asf/bahir-website/tree/b20a1c1c Diff: http://git-wip-us.apache.org/repos/asf/bahir-website/diff/b20a1c1c Branch: refs/heads/asf-site Commit: b20a1c1c195a0fc11d9f428b4ec16b633bec0627 Parents: e6b13fb Author: Christian Kadner <[email protected]> Authored: Wed Feb 22 03:37:14 2017 -0800 Committer: Christian Kadner <[email protected]> Committed: Wed Feb 22 03:37:14 2017 -0800 ---------------------------------------------------------------------- content/community-members/index.html | 3 + content/community/index.html | 3 + content/contributing-extensions/index.html | 3 + content/contributing/index.html | 3 + .../docs/spark/2.0.0/documentation/index.html | 3 + .../2.0.0/spark-sql-streaming-mqtt/index.html | 3 + .../spark/2.0.0/spark-streaming-akka/index.html | 3 + .../spark/2.0.0/spark-streaming-mqtt/index.html | 3 + .../2.0.0/spark-streaming-twitter/index.html | 3 + .../2.0.0/spark-streaming-zeromq/index.html | 3 + .../docs/spark/2.0.1/documentation/index.html | 3 + .../2.0.1/spark-sql-streaming-mqtt/index.html | 3 + .../spark/2.0.1/spark-streaming-akka/index.html | 3 + .../spark/2.0.1/spark-streaming-mqtt/index.html | 3 + .../2.0.1/spark-streaming-twitter/index.html | 3 + .../2.0.1/spark-streaming-zeromq/index.html | 3 + .../docs/spark/2.0.2/documentation/index.html | 3 + .../2.0.2/spark-sql-streaming-mqtt/index.html | 3 + .../spark/2.0.2/spark-streaming-akka/index.html | 3 + .../spark/2.0.2/spark-streaming-mqtt/index.html | 3 + .../2.0.2/spark-streaming-twitter/index.html | 3 + .../2.0.2/spark-streaming-zeromq/index.html | 3 + .../docs/spark/2.1.0/documentation/index.html | 262 +++++++++++++ .../2.1.0/spark-sql-streaming-mqtt/index.html | 379 +++++++++++++++++++ .../spark/2.1.0/spark-streaming-akka/index.html | 315 +++++++++++++++ .../spark/2.1.0/spark-streaming-mqtt/index.html | 319 ++++++++++++++++ .../2.1.0/spark-streaming-twitter/index.html | 298 +++++++++++++++ .../2.1.0/spark-streaming-zeromq/index.html | 290 ++++++++++++++ .../docs/spark/current/documentation/index.html | 3 + .../current/spark-sql-streaming-mqtt/index.html | 9 +- .../current/spark-streaming-akka/index.html | 9 +- .../current/spark-streaming-mqtt/index.html | 9 +- .../current/spark-streaming-twitter/index.html | 9 +- .../current/spark-streaming-zeromq/index.html | 9 +- content/download/index.html | 29 +- content/feed.xml | 4 +- content/history/index.html | 3 + content/index.html | 5 +- content/privacy-policy/index.html | 3 + content/releases/2.0.0/release-notes/index.html | 11 +- content/releases/2.0.1/release-notes/index.html | 11 +- content/releases/2.0.2/release-notes/index.html | 11 +- content/releases/2.1.0/release-notes/index.html | 253 +++++++++++++ 43 files changed, 2264 insertions(+), 43 deletions(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/bahir-website/blob/b20a1c1c/content/community-members/index.html ---------------------------------------------------------------------- diff --git a/content/community-members/index.html b/content/community-members/index.html index 274b316..a91fc64 100644 --- a/content/community-members/index.html +++ b/content/community-members/index.html @@ -108,6 +108,9 @@ <li><a href="/docs/spark/current/documentation" target="_self">Bahir Spark Extensions - Current</a></li> + <li><a href="/docs/spark/2.1.0/documentation" target="_self">Bahir Spark Extensions - 2.1.0</a></li> + + <li><a href="/docs/spark/2.0.2/documentation" target="_self">Bahir Spark Extensions - 2.0.2</a></li> http://git-wip-us.apache.org/repos/asf/bahir-website/blob/b20a1c1c/content/community/index.html ---------------------------------------------------------------------- diff --git a/content/community/index.html b/content/community/index.html index 45ec60e..f50e34f 100644 --- a/content/community/index.html +++ b/content/community/index.html @@ -108,6 +108,9 @@ <li><a href="/docs/spark/current/documentation" target="_self">Bahir Spark Extensions - Current</a></li> + <li><a href="/docs/spark/2.1.0/documentation" target="_self">Bahir Spark Extensions - 2.1.0</a></li> + + <li><a href="/docs/spark/2.0.2/documentation" target="_self">Bahir Spark Extensions - 2.0.2</a></li> http://git-wip-us.apache.org/repos/asf/bahir-website/blob/b20a1c1c/content/contributing-extensions/index.html ---------------------------------------------------------------------- diff --git a/content/contributing-extensions/index.html b/content/contributing-extensions/index.html index 0684237..02a5f27 100644 --- a/content/contributing-extensions/index.html +++ b/content/contributing-extensions/index.html @@ -108,6 +108,9 @@ <li><a href="/docs/spark/current/documentation" target="_self">Bahir Spark Extensions - Current</a></li> + <li><a href="/docs/spark/2.1.0/documentation" target="_self">Bahir Spark Extensions - 2.1.0</a></li> + + <li><a href="/docs/spark/2.0.2/documentation" target="_self">Bahir Spark Extensions - 2.0.2</a></li> http://git-wip-us.apache.org/repos/asf/bahir-website/blob/b20a1c1c/content/contributing/index.html ---------------------------------------------------------------------- diff --git a/content/contributing/index.html b/content/contributing/index.html index e4c4fa4..4831460 100644 --- a/content/contributing/index.html +++ b/content/contributing/index.html @@ -108,6 +108,9 @@ <li><a href="/docs/spark/current/documentation" target="_self">Bahir Spark Extensions - Current</a></li> + <li><a href="/docs/spark/2.1.0/documentation" target="_self">Bahir Spark Extensions - 2.1.0</a></li> + + <li><a href="/docs/spark/2.0.2/documentation" target="_self">Bahir Spark Extensions - 2.0.2</a></li> 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a/content/docs/spark/2.0.0/spark-sql-streaming-mqtt/index.html b/content/docs/spark/2.0.0/spark-sql-streaming-mqtt/index.html index 6c99ebf..f3d0c64 100644 --- a/content/docs/spark/2.0.0/spark-sql-streaming-mqtt/index.html +++ b/content/docs/spark/2.0.0/spark-sql-streaming-mqtt/index.html @@ -108,6 +108,9 @@ <li><a href="/docs/spark/current/documentation" target="_self">Bahir Spark Extensions - Current</a></li> + <li><a href="/docs/spark/2.1.0/documentation" target="_self">Bahir Spark Extensions - 2.1.0</a></li> + + <li><a href="/docs/spark/2.0.2/documentation" target="_self">Bahir Spark Extensions - 2.0.2</a></li> http://git-wip-us.apache.org/repos/asf/bahir-website/blob/b20a1c1c/content/docs/spark/2.0.0/spark-streaming-akka/index.html ---------------------------------------------------------------------- diff --git a/content/docs/spark/2.0.0/spark-streaming-akka/index.html b/content/docs/spark/2.0.0/spark-streaming-akka/index.html index cfa5e01..a1ed742 100644 --- 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href="/docs/spark/current/documentation" target="_self">Bahir Spark Extensions - Current</a></li> + <li><a href="/docs/spark/2.1.0/documentation" target="_self">Bahir Spark Extensions - 2.1.0</a></li> + + <li><a href="/docs/spark/2.0.2/documentation" target="_self">Bahir Spark Extensions - 2.0.2</a></li> http://git-wip-us.apache.org/repos/asf/bahir-website/blob/b20a1c1c/content/docs/spark/2.0.0/spark-streaming-twitter/index.html ---------------------------------------------------------------------- diff --git a/content/docs/spark/2.0.0/spark-streaming-twitter/index.html b/content/docs/spark/2.0.0/spark-streaming-twitter/index.html index 60fbd66..ccf4fff 100644 --- a/content/docs/spark/2.0.0/spark-streaming-twitter/index.html +++ b/content/docs/spark/2.0.0/spark-streaming-twitter/index.html @@ -108,6 +108,9 @@ <li><a href="/docs/spark/current/documentation" target="_self">Bahir Spark Extensions - Current</a></li> + <li><a href="/docs/spark/2.1.0/documentation" target="_self">Bahir Spark Extensions - 2.1.0</a></li> + + <li><a href="/docs/spark/2.0.2/documentation" target="_self">Bahir Spark Extensions - 2.0.2</a></li> http://git-wip-us.apache.org/repos/asf/bahir-website/blob/b20a1c1c/content/docs/spark/2.0.0/spark-streaming-zeromq/index.html ---------------------------------------------------------------------- diff --git a/content/docs/spark/2.0.0/spark-streaming-zeromq/index.html b/content/docs/spark/2.0.0/spark-streaming-zeromq/index.html index 654311f..01359fc 100644 --- a/content/docs/spark/2.0.0/spark-streaming-zeromq/index.html +++ b/content/docs/spark/2.0.0/spark-streaming-zeromq/index.html @@ -108,6 +108,9 @@ <li><a href="/docs/spark/current/documentation" target="_self">Bahir Spark Extensions - Current</a></li> + <li><a href="/docs/spark/2.1.0/documentation" target="_self">Bahir Spark Extensions - 2.1.0</a></li> + + <li><a href="/docs/spark/2.0.2/documentation" target="_self">Bahir Spark Extensions - 2.0.2</a></li> 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href="/docs/spark/current/documentation" target="_self">Bahir Spark Extensions - Current</a></li> + <li><a href="/docs/spark/2.1.0/documentation" target="_self">Bahir Spark Extensions - 2.1.0</a></li> + + <li><a href="/docs/spark/2.0.2/documentation" target="_self">Bahir Spark Extensions - 2.0.2</a></li> http://git-wip-us.apache.org/repos/asf/bahir-website/blob/b20a1c1c/content/docs/spark/2.0.1/spark-streaming-twitter/index.html ---------------------------------------------------------------------- diff --git a/content/docs/spark/2.0.1/spark-streaming-twitter/index.html b/content/docs/spark/2.0.1/spark-streaming-twitter/index.html index 60fec35..16c6213 100644 --- a/content/docs/spark/2.0.1/spark-streaming-twitter/index.html +++ b/content/docs/spark/2.0.1/spark-streaming-twitter/index.html @@ -108,6 +108,9 @@ <li><a href="/docs/spark/current/documentation" target="_self">Bahir Spark Extensions - Current</a></li> + <li><a href="/docs/spark/2.1.0/documentation" target="_self">Bahir Spark Extensions - 2.1.0</a></li> + + <li><a href="/docs/spark/2.0.2/documentation" target="_self">Bahir Spark Extensions - 2.0.2</a></li> http://git-wip-us.apache.org/repos/asf/bahir-website/blob/b20a1c1c/content/docs/spark/2.0.1/spark-streaming-zeromq/index.html ---------------------------------------------------------------------- diff --git a/content/docs/spark/2.0.1/spark-streaming-zeromq/index.html b/content/docs/spark/2.0.1/spark-streaming-zeromq/index.html index 61fcf83..6002548 100644 --- a/content/docs/spark/2.0.1/spark-streaming-zeromq/index.html +++ b/content/docs/spark/2.0.1/spark-streaming-zeromq/index.html @@ -108,6 +108,9 @@ <li><a href="/docs/spark/current/documentation" target="_self">Bahir Spark Extensions - Current</a></li> + <li><a href="/docs/spark/2.1.0/documentation" target="_self">Bahir Spark Extensions - 2.1.0</a></li> + + <li><a href="/docs/spark/2.0.2/documentation" target="_self">Bahir Spark Extensions - 2.0.2</a></li> 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href="/docs/spark/current/documentation" target="_self">Bahir Spark Extensions - Current</a></li> + <li><a href="/docs/spark/2.1.0/documentation" target="_self">Bahir Spark Extensions - 2.1.0</a></li> + + <li><a href="/docs/spark/2.0.2/documentation" target="_self">Bahir Spark Extensions - 2.0.2</a></li> http://git-wip-us.apache.org/repos/asf/bahir-website/blob/b20a1c1c/content/docs/spark/2.0.2/spark-streaming-twitter/index.html ---------------------------------------------------------------------- diff --git a/content/docs/spark/2.0.2/spark-streaming-twitter/index.html b/content/docs/spark/2.0.2/spark-streaming-twitter/index.html index 2fc8917..f1fefef 100644 --- a/content/docs/spark/2.0.2/spark-streaming-twitter/index.html +++ b/content/docs/spark/2.0.2/spark-streaming-twitter/index.html @@ -108,6 +108,9 @@ <li><a href="/docs/spark/current/documentation" target="_self">Bahir Spark Extensions - Current</a></li> + <li><a href="/docs/spark/2.1.0/documentation" target="_self">Bahir Spark Extensions - 2.1.0</a></li> + + <li><a href="/docs/spark/2.0.2/documentation" target="_self">Bahir Spark Extensions - 2.0.2</a></li> http://git-wip-us.apache.org/repos/asf/bahir-website/blob/b20a1c1c/content/docs/spark/2.0.2/spark-streaming-zeromq/index.html ---------------------------------------------------------------------- diff --git a/content/docs/spark/2.0.2/spark-streaming-zeromq/index.html b/content/docs/spark/2.0.2/spark-streaming-zeromq/index.html index 5d5b87c..050abb9 100644 --- a/content/docs/spark/2.0.2/spark-streaming-zeromq/index.html +++ b/content/docs/spark/2.0.2/spark-streaming-zeromq/index.html @@ -108,6 +108,9 @@ <li><a href="/docs/spark/current/documentation" target="_self">Bahir Spark Extensions - Current</a></li> + <li><a href="/docs/spark/2.1.0/documentation" target="_self">Bahir Spark Extensions - 2.1.0</a></li> + + <li><a href="/docs/spark/2.0.2/documentation" target="_self">Bahir Spark Extensions - 2.0.2</a></li> 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<li><a href="http://www.apache.org/foundation/thanks.html"; target="_blank">Thanks</a></li> + + + <li><a href="/privacy-policy" target="_self">Privacy Policy</a></li> + + </ul> + + </li> + + + </ul> + </nav><!--/.navbar-collapse --> + <!-- /.navbar-collapse --> + </div> + <!-- /.container --> + </nav> +</div> + + + <div class="container"> + + + +<!--<div class="hero-unit Spark Structured Streaming MQTT"> + <h1></h1> +</div> +--> + +<div class="row"> + <div class="col-md-12"> + <!-- + +--> + +<p>A library for reading data from MQTT Servers using Spark SQL Streaming ( or Structured streaming.).</p> + +<h2 id="linking">Linking</h2> + +<p>Using SBT:</p> + +<div class="highlighter-rouge"><pre class="highlight"><code>libraryDependencies += "org.apache.bahir" %% "spark-sql-streaming-mqtt" % "2.1.0" +</code></pre> +</div> + +<p>Using Maven:</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><dependency> + <groupId>org.apache.bahir</groupId> + <artifactId>spark-sql-streaming-mqtt_2.11</artifactId> + <version>2.1.0</version> +</dependency> +</code></pre> +</div> + +<p>This library can also be added to Spark jobs launched through <code class="highlighter-rouge">spark-shell</code> or <code class="highlighter-rouge">spark-submit</code> by using the <code class="highlighter-rouge">--packages</code> command line option. +For example, to include it when starting the spark shell:</p> + +<div class="highlighter-rouge"><pre class="highlight"><code>$ bin/spark-shell --packages org.apache.bahir:spark-sql-streaming-mqtt_2.11:2.1.0 +</code></pre> +</div> + +<p>Unlike using <code class="highlighter-rouge">--jars</code>, using <code class="highlighter-rouge">--packages</code> ensures that this library and its dependencies will be added to the classpath. +The <code class="highlighter-rouge">--packages</code> argument can also be used with <code class="highlighter-rouge">bin/spark-submit</code>.</p> + +<p>This library is compiled for Scala 2.11 only, and intends to support Spark 2.0 onwards.</p> + +<h2 id="examples">Examples</h2> + +<p>A SQL Stream can be created with data streams received through MQTT Server using,</p> + +<div class="highlighter-rouge"><pre class="highlight"><code>sqlContext.readStream + .format("org.apache.bahir.sql.streaming.mqtt.MQTTStreamSourceProvider") + .option("topic", "mytopic") + .load("tcp://localhost:1883") +</code></pre> +</div> + +<h2 id="enable-recovering-from-failures">Enable recovering from failures.</h2> + +<p>Setting values for option <code class="highlighter-rouge">localStorage</code> and <code class="highlighter-rouge">clientId</code> helps in recovering in case of a restart, by restoring the state where it left off before the shutdown.</p> + +<div class="highlighter-rouge"><pre class="highlight"><code>sqlContext.readStream + .format("org.apache.bahir.sql.streaming.mqtt.MQTTStreamSourceProvider") + .option("topic", "mytopic") + .option("localStorage", "/path/to/localdir") + .option("clientId", "some-client-id") + .load("tcp://localhost:1883") +</code></pre> +</div> + +<h2 id="configuration-options">Configuration options.</h2> + +<p>This source uses <a href="https://eclipse.org/paho/clients/java/";>Eclipse Paho Java Client</a>. Client API documentation is located <a href="http://www.eclipse.org/paho/files/javadoc/index.html";>here</a>.</p> + +<ul> + <li><code class="highlighter-rouge">brokerUrl</code> A url MqttClient connects to. Set this or <code class="highlighter-rouge">path</code> as the url of the Mqtt Server. e.g. tcp://localhost:1883.</li> + <li><code class="highlighter-rouge">persistence</code> By default it is used for storing incoming messages on disk. If <code class="highlighter-rouge">memory</code> is provided as value for this option, then recovery on restart is not supported.</li> + <li><code class="highlighter-rouge">topic</code> Topic MqttClient subscribes to.</li> + <li><code class="highlighter-rouge">clientId</code> clientId, this client is assoicated with. Provide the same value to recover a stopped client.</li> + <li><code class="highlighter-rouge">QoS</code> The maximum quality of service to subscribe each topic at. Messages published at a lower quality of service will be received at the published QoS. Messages published at a higher quality of service will be received using the QoS specified on the subscribe.</li> + <li><code class="highlighter-rouge">username</code> Sets the user name to use for the connection to Mqtt Server. Do not set it, if server does not need this. Setting it empty will lead to errors.</li> + <li><code class="highlighter-rouge">password</code> Sets the password to use for the connection.</li> + <li><code class="highlighter-rouge">cleanSession</code> Setting it true starts a clean session, removes all checkpointed messages by a previous run of this source. This is set to false by default.</li> + <li><code class="highlighter-rouge">connectionTimeout</code> Sets the connection timeout, a value of 0 is interpretted as wait until client connects. See <code class="highlighter-rouge">MqttConnectOptions.setConnectionTimeout</code> for more information.</li> + <li><code class="highlighter-rouge">keepAlive</code> Same as <code class="highlighter-rouge">MqttConnectOptions.setKeepAliveInterval</code>.</li> + <li><code class="highlighter-rouge">mqttVersion</code> Same as <code class="highlighter-rouge">MqttConnectOptions.setMqttVersion</code>.</li> +</ul> + +<h3 id="scala-api">Scala API</h3> + +<p>An example, for scala API to count words from incoming message stream.</p> + +<div class="highlighter-rouge"><pre class="highlight"><code>// Create DataFrame representing the stream of input lines from connection to mqtt server +val lines = spark.readStream + .format("org.apache.bahir.sql.streaming.mqtt.MQTTStreamSourceProvider") + .option("topic", topic) + .load(brokerUrl).as[(String, Timestamp)] + +// Split the lines into words +val words = lines.map(_._1).flatMap(_.split(" ")) + +// Generate running word count +val wordCounts = words.groupBy("value").count() + +// Start running the query that prints the running counts to the console +val query = wordCounts.writeStream + .outputMode("complete") + .format("console") + .start() + +query.awaitTermination() +</code></pre> +</div> + +<p>Please see <code class="highlighter-rouge">MQTTStreamWordCount.scala</code> for full example.</p> + +<h3 id="java-api">Java API</h3> + +<p>An example, for Java API to count words from incoming message stream.</p> + +<div class="highlighter-rouge"><pre class="highlight"><code>// Create DataFrame representing the stream of input lines from connection to mqtt server. +Dataset<String> lines = spark + .readStream() + .format("org.apache.bahir.sql.streaming.mqtt.MQTTStreamSourceProvider") + .option("topic", topic) + .load(brokerUrl).select("value").as(Encoders.STRING()); + +// Split the lines into words +Dataset<String> words = lines.flatMap(new FlatMapFunction<String, String>() { + @Override + public Iterator<String> call(String x) { + return Arrays.asList(x.split(" ")).iterator(); + } +}, Encoders.STRING()); + +// Generate running word count +Dataset<Row> wordCounts = words.groupBy("value").count(); + +// Start running the query that prints the running counts to the console +StreamingQuery query = wordCounts.writeStream() + .outputMode("complete") + .format("console") + .start(); + +query.awaitTermination(); +</code></pre> +</div> + +<p>Please see <code class="highlighter-rouge">JavaMQTTStreamWordCount.java</code> for full example.</p> + + + </div> +</div> + + + + <hr> + + <!-- <p>© 2017 </p>--> + <footer class="site-footer"> + <div class="wrapper"> + <div class="footer-col-wrapper"> + + <div style="text-align:center;"> + + <div> + Copyright © 2016-2017 <a href="http://www.apache.org";>The Apache Software Foundation</a>. + Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0";>Apache License, Version + 2.0</a>. + <br> + + Apache and the Apache Feather logo are trademarks of The Apache Software Foundation. + + </div> + </div> + </div> + </div> +</footer> + + </div> + + + + + <script type="text/javascript"> + (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ + (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), + m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) + })(window,document,'script','//www.google-analytics.com/analytics.js','ga'); 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The supervisor strategy of +this actor can be configured to handle failures, etc.</p> + +<div class="highlighter-rouge"><pre class="highlight"><code>class CustomActor extends ActorReceiver { + def receive = { + case data: String => store(data) + } +} + +// A new input stream can be created with this custom actor as +val ssc: StreamingContext = ... +val lines = AkkaUtils.createStream[String](ssc, Props[CustomActor](), "CustomReceiver") +</code></pre> +</div> + +<h3 id="java-api">Java API</h3> + +<p>You need to extend <code class="highlighter-rouge">JavaActorReceiver</code> so as to store received data into Spark using <code class="highlighter-rouge">store(...)</code> methods. The supervisor strategy of +this actor can be configured to handle failures, etc.</p> + +<div class="highlighter-rouge"><pre class="highlight"><code>class CustomActor extends JavaActorReceiver { + @Override + public void onReceive(Object msg) throws Exception { + store((String) msg); + } +} + +// A new input stream can be created with this custom actor as +JavaStreamingContext jssc = ...; +JavaDStream<String> lines = AkkaUtils.<String>createStream(jssc, Props.create(CustomActor.class), "CustomReceiver"); +</code></pre> +</div> + +<p>See end-to-end examples at <a href="https://github.com/apache/bahir/tree/master/streaming-akka/examples";>Akka Examples</a></p> + + </div> +</div> + + + + <hr> + + <!-- <p>© 2017 </p>--> + <footer class="site-footer"> + <div class="wrapper"> + <div class="footer-col-wrapper"> + + <div style="text-align:center;"> + + <div> + Copyright © 2016-2017 <a href="http://www.apache.org";>The Apache Software Foundation</a>. + Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0";>Apache License, Version + 2.0</a>. + <br> + + Apache and the Apache Feather logo are trademarks of The Apache Software Foundation. + + </div> + </div> + </div> + </div> +</footer> + + </div> + + + + + <script type="text/javascript"> + (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ + (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), + m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) + })(window,document,'script','//www.google-analytics.com/analytics.js','ga'); 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It was designed as an extremely lightweight publish/subscribe messaging transport. It is useful for connections with remote locations where a small code footprint is required and/or network bandwidth is at a premium.</p> + +<h2 id="linking">Linking</h2> + +<p>Using SBT:</p> + +<div class="highlighter-rouge"><pre class="highlight"><code>libraryDependencies += "org.apache.bahir" %% "spark-streaming-mqtt" % "2.1.0" +</code></pre> +</div> + +<p>Using Maven:</p> + +<div class="highlighter-rouge"><pre class="highlight"><code><dependency> + <groupId>org.apache.bahir</groupId> + <artifactId>spark-streaming-mqtt_2.11</artifactId> + <version>2.1.0</version> +</dependency> +</code></pre> +</div> + +<p>This library can also be added to Spark jobs launched through <code class="highlighter-rouge">spark-shell</code> or <code class="highlighter-rouge">spark-submit</code> by using the <code class="highlighter-rouge">--packages</code> command line option. +For example, to include it when starting the spark shell:</p> + +<div class="highlighter-rouge"><pre class="highlight"><code>$ bin/spark-shell --packages org.apache.bahir:spark-streaming-mqtt_2.11:2.1.0 +</code></pre> +</div> + +<p>Unlike using <code class="highlighter-rouge">--jars</code>, using <code class="highlighter-rouge">--packages</code> ensures that this library and its dependencies will be added to the classpath. +The <code class="highlighter-rouge">--packages</code> argument can also be used with <code class="highlighter-rouge">bin/spark-submit</code>.</p> + +<p>This library is cross-published for Scala 2.10 and Scala 2.11, so users should replace the proper Scala version (2.10 or 2.11) in the commands listed above.</p> + +<h2 id="configuration-options">Configuration options.</h2> + +<p>This source uses the <a href="https://eclipse.org/paho/clients/java/";>Eclipse Paho Java Client</a>. Client API documentation is located <a href="http://www.eclipse.org/paho/files/javadoc/index.html";>here</a>.</p> + +<ul> + <li><code class="highlighter-rouge">brokerUrl</code> A url MqttClient connects to. Set this as the url of the Mqtt Server. e.g. tcp://localhost:1883.</li> + <li><code class="highlighter-rouge">storageLevel</code> By default it is used for storing incoming messages on disk.</li> + <li><code class="highlighter-rouge">topic</code> Topic MqttClient subscribes to.</li> + <li><code class="highlighter-rouge">clientId</code> clientId, this client is assoicated with. Provide the same value to recover a stopped client.</li> + <li><code class="highlighter-rouge">QoS</code> The maximum quality of service to subscribe each topic at. Messages published at a lower quality of service will be received at the published QoS. Messages published at a higher quality of service will be received using the QoS specified on the subscribe.</li> + <li><code class="highlighter-rouge">username</code> Sets the user name to use for the connection to Mqtt Server. Do not set it, if server does not need this. Setting it empty will lead to errors.</li> + <li><code class="highlighter-rouge">password</code> Sets the password to use for the connection.</li> + <li><code class="highlighter-rouge">cleanSession</code> Setting it true starts a clean session, removes all checkpointed messages by a previous run of this source. This is set to false by default.</li> + <li><code class="highlighter-rouge">connectionTimeout</code> Sets the connection timeout, a value of 0 is interpreted as wait until client connects. See <code class="highlighter-rouge">MqttConnectOptions.setConnectionTimeout</code> for more information.</li> + <li><code class="highlighter-rouge">keepAlive</code> Same as <code class="highlighter-rouge">MqttConnectOptions.setKeepAliveInterval</code>.</li> + <li><code class="highlighter-rouge">mqttVersion</code> Same as <code class="highlighter-rouge">MqttConnectOptions.setMqttVersion</code>.</li> +</ul> + +<h2 id="examples">Examples</h2> + +<h3 id="scala-api">Scala API</h3> + +<p>You need to extend <code class="highlighter-rouge">ActorReceiver</code> so as to store received data into Spark using <code class="highlighter-rouge">store(...)</code> methods. The supervisor strategy of +this actor can be configured to handle failures, etc.</p> + +<div class="highlighter-rouge"><pre class="highlight"><code>val lines = MQTTUtils.createStream(ssc, brokerUrl, topic) +</code></pre> +</div> + +<p>Additional mqtt connection options can be provided:</p> + +<pre><code class="language-Scala">val lines = MQTTUtils.createStream(ssc, brokerUrl, topic, storageLevel, clientId, username, password, cleanSession, qos, connectionTimeout, keepAliveInterval, mqttVersion) +</code></pre> + +<h3 id="java-api">Java API</h3> + +<p>You need to extend <code class="highlighter-rouge">JavaActorReceiver</code> so as to store received data into Spark using <code class="highlighter-rouge">store(...)</code> methods. The supervisor strategy of +this actor can be configured to handle failures, etc.</p> + +<div class="highlighter-rouge"><pre class="highlight"><code>JavaDStream<String> lines = MQTTUtils.createStream(jssc, brokerUrl, topic); +</code></pre> +</div> + +<p>See end-to-end examples at <a href="https://github.com/apache/bahir/tree/master/streaming-mqtt/examples";>MQTT Examples</a></p> + + </div> +</div> + + + + <hr> + + <!-- <p>© 2017 </p>--> + <footer class="site-footer"> + <div class="wrapper"> + <div class="footer-col-wrapper"> + + <div style="text-align:center;"> + + <div> + Copyright © 2016-2017 <a href="http://www.apache.org";>The Apache Software Foundation</a>. + Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0";>Apache License, Version + 2.0</a>. + <br> + + Apache and the Apache Feather logo are trademarks of The Apache Software Foundation. + + </div> + </div> + </div> + </div> +</footer> + + </div> + + + + + <script type="text/javascript"> + (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ + (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), + m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) + })(window,document,'script','//www.google-analytics.com/analytics.js','ga'); 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Authentication information +can be provided by any of the <a href="http://twitter4j.org/en/configuration.html";>methods</a> supported by Twitter4J library. You can import the <code class="highlighter-rouge">TwitterUtils</code> class and create a DStream with <code class="highlighter-rouge">TwitterUtils.createStream</code> as shown below.</p> + +<h3 id="scala-api">Scala API</h3> + +<div class="highlighter-rouge"><pre class="highlight"><code>import org.apache.spark.streaming.twitter._ + +TwitterUtils.createStream(ssc, None) +</code></pre> +</div> + +<h3 id="java-api">Java API</h3> + +<div class="highlighter-rouge"><pre class="highlight"><code>import org.apache.spark.streaming.twitter.*; + +TwitterUtils.createStream(jssc); +</code></pre> +</div> + +<p>You can also either get the public stream, or get the filtered stream based on keywords. +See end-to-end examples at <a href="https://github.com/apache/bahir/tree/master/streaming-twitter/examples";>Twitter Examples</a></p> + + </div> +</div> + + + + <hr> + + <!-- <p>© 2017 </p>--> + <footer class="site-footer"> + <div class="wrapper"> + <div class="footer-col-wrapper"> + + <div style="text-align:center;"> + + <div> + Copyright © 2016-2017 <a href="http://www.apache.org";>The Apache Software Foundation</a>. + Licensed under the <a href="http://www.apache.org/licenses/LICENSE-2.0";>Apache License, Version + 2.0</a>. + <br> + + Apache and the Apache Feather logo are trademarks of The Apache Software Foundation. + + </div> + </div> + </div> + </div> +</footer> + + </div> + + + + + <script type="text/javascript"> + (function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){ + (i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o), + m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m) + })(window,document,'script','//www.google-analytics.com/analytics.js','ga'); + + ga('create', 'UA-79140859-1', 'bahir.apache.org'); + ga('require', 'linkid', 'linkid.js'); + ga('send', 'pageview'); + +</script> + + + + <script src="/assets/themes/apache-clean/jquery/jquery-2.1.1.min.js"></script> + + <script src="/assets/themes/apache-clean/bootstrap/js/bootstrap.min.js"></script> + + + </body> +</html> +
