Apache
/
activemq-artemis
mirror of https://github.com/apache/activemq-artemis.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
activemq-artemis/examples/jms/consumer-rate-limit/readme.html

183 lines
6.0 KiB
HTML
Raw Normal View History

ACTIVEMQ6-43(reopened) : Replace License Headers on codebase - added missing license headers found by maven rat plugin. most of them added automatically via apache-rat a few manually added - added apache-rat maven plugin to the build cycle
2015-01-05 07:45:36 -05:00
<!--
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied. See the License for the
specific language governing permissions and limitations
under the License.
-->
ACTIVEMQ6-1 - Initial HornetQ Donation Commit https://issues.apache.org/jira/browse/ACTIVEMQ6-1 This is the initial donation of the HornetQ codebase as per document http://incubator.apache.org/ip-clearance/hornetq.html
2014-10-31 06:20:28 -04:00
<html>
<head>
Ensure all references to the project use ActiveMQ Artemis
2015-05-13 06:12:07 -04:00
<title>ActiveMQ Artemis JMS Message Consumer Rate Limiting</title>
ACTIVEMQ6-1 - Initial HornetQ Donation Commit https://issues.apache.org/jira/browse/ACTIVEMQ6-1 This is the initial donation of the HornetQ codebase as per document http://incubator.apache.org/ip-clearance/hornetq.html
2014-10-31 06:20:28 -04:00
<link rel="stylesheet" type="text/css" href="../common/common.css" />
<link rel="stylesheet" type="text/css" href="../common/prettify.css" />
<script type="text/javascript" src="../common/prettify.js"></script>
</head>
<body onload="prettyPrint()">
<h1>JMS Message Consumer Rate Limiting</h1>
Ensure all references to the project use ActiveMQ Artemis
2015-05-13 06:12:07 -04:00
<p>With ActiveMQ Artemis you can specify a maximum consume rate at which a JMS MessageConsumer will consume messages.
More name changes to activemq more hornetq changes
2014-11-19 14:58:44 -05:00
This can be specified when creating or deploying the connection factory. See <code>activemq-jms.xml</code></p>
Ensure all references to the project use ActiveMQ Artemis
2015-05-13 06:12:07 -04:00
<p>If this value is specified then ActiveMQ Artemis will ensure that messages are never consumed at a rate higher than
ACTIVEMQ6-1 - Initial HornetQ Donation Commit https://issues.apache.org/jira/browse/ACTIVEMQ6-1 This is the initial donation of the HornetQ codebase as per document http://incubator.apache.org/ip-clearance/hornetq.html
2014-10-31 06:20:28 -04:00
the specified rate. This is a form of consumer <i>throttling</i>.</p>
<h2>Example step-by-step</h2>
More name changes to activemq more hornetq changes
2014-11-19 14:58:44 -05:00
<p>In this example we specify a <code>consumer-max-rate</code> of <code>10</code> messages per second in the <code>activemq-jms.xml</code>
ACTIVEMQ6-1 - Initial HornetQ Donation Commit https://issues.apache.org/jira/browse/ACTIVEMQ6-1 This is the initial donation of the HornetQ codebase as per document http://incubator.apache.org/ip-clearance/hornetq.html
2014-10-31 06:20:28 -04:00
file when deploying the connection factory:</p>
<pre class="prettyprint">
<code>
&lt;connection-factory name="ConnectionFactory"&gt;
&lt;connector-ref connector-name="netty-connector"/&gt;
&lt;entries&gt;
&lt;entry name="ConnectionFactory"/&gt;
&lt;/entries&gt;
&lt;!-- We limit consumers created on this connection factory to consume messages at a maximum rate
of 10 messages per sec --&gt;
&lt;consumer-max-rate&gt;50&lt;/producer-max-rate&gt;
&lt;/connection-factory&gt;
</code>
</pre>
<p>We then simply consume as many messages as we can in 10 seconds and note how many messages are actually consumed.</p>
<p>We note that the number of messages consumed per second never exceeds the specified value of <code>10</code> messages per second.</p>
added examples to release profile Also gave them all a profile so they wouldn't actually run during the build. fixed some of the comilation errors in the Rest example module
2015-03-07 11:51:01 -05:00
<p><i>To run the example, simply type <code>mvn verify -Pexample</code> from this directory</i></p>
ACTIVEMQ6-1 - Initial HornetQ Donation Commit https://issues.apache.org/jira/browse/ACTIVEMQ6-1 This is the initial donation of the HornetQ codebase as per document http://incubator.apache.org/ip-clearance/hornetq.html
2014-10-31 06:20:28 -04:00
<ol>
<li>Create an initial context to perform the JNDI lookup.</li>
<pre class="prettyprint">
<code>initialContext = getContext(0);</code>
</pre>
<li>Perfom a lookup on the queue</li>
<pre class="prettyprint">
<code>Queue queue = (Queue)initialContext.lookup("/queue/exampleQueue");</code>
</pre>
<li>Perform a lookup on the Connection Factory</li>
<pre class="prettyprint">
<code>ConnectionFactory cf = (ConnectionFactory)initialContext.lookup("/ConnectionFactory");</code>
</pre>
<li>Create a JMS Connection</li>
<pre class="prettyprint">
<code>connection = cf.createConnection();</code>
</pre>
<li>Create a JMS Session</li>
<pre class="prettyprint">
<code>Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);</code>
</pre>
<li>Create a JMS MessageProducer</li>
<pre class="prettyprint">
<code>MessageProducer producer = session.createProducer(queue);</code>
</pre>
<li>Create a JMS MessageConsumer</li>
<pre class="prettyprint">
<code>MessageConsumer consumer = session.createConsumer(queue);</code>
</pre>
<li>Start the connection</li>
<pre class="prettyprint">
<code>
connection.start();
</code>
</pre>
<li>Send a bunch of messages</li>
<pre class="prettyprint">
<code>
final int numMessages = 150;
for (int i = 0; i < numMessages; i++)
{
TextMessage message = session.createTextMessage("This is text message: " + i);
producer.send(message);
}
</code>
</pre>
<li>Consume as many messages as we can in 10 seconds</li>
<pre class="prettyprint">
<code>
final long duration = 10000;
int i = 0;
long start = System.currentTimeMillis();
while (System.currentTimeMillis() - start <= duration)
{
TextMessage message = (TextMessage)consumer.receive(2000);
if (message == null)
{
return false;
}
i++;
}
long end = System.currentTimeMillis();
double rate = 1000 * (double)i / (end - start);
System.out.println("We consumed " + i + " messages in " + (end - start) + " milliseconds");
System.out.println("Actual consume rate was " + rate + " messages per second");
</code>
</pre>
<li>This should produce output something like:</li>
<pre class="prettyprint">
<code>
[java] Sent messages
[java] Will now try and consume as many as we can in 10 seconds ...
[java] We consumed 100 messages in 10001 milliseconds
[java] Actual consume rate was 9.99900009999 messages per second
</code>
</pre>
<li>Be sure to close our resources!</li>
<pre class="prettyprint">
<code>
finally
{
if (initialContext != null)
{
initialContext.close();
}
if (connection != null)
{
connection.close();
}
}</code>
</pre>
</ol>
</body>
ACTIVEMQ6-43(reopened) : Replace License Headers on codebase - added missing license headers found by maven rat plugin. most of them added automatically via apache-rat a few manually added - added apache-rat maven plugin to the build cycle
2015-01-05 07:45:36 -05:00
</html>