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From jstrac...@apache.org
Subject svn commit: r374430 [11/45] - /incubator/activemq/site/
Date Thu, 02 Feb 2006 16:33:52 GMT
Added: incubator/activemq/site/Discovery+Transport+Reference
URL: http://svn.apache.org/viewcvs/incubator/activemq/site/Discovery%2BTransport%2BReference?rev=374430&view=auto
==============================================================================
--- incubator/activemq/site/Discovery+Transport+Reference (added)
+++ incubator/activemq/site/Discovery+Transport+Reference Thu Feb  2 08:31:10 2006
@@ -0,0 +1,271 @@
+
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+            Discovery Transport Reference 
+                </td>
+                <td align="right">
+            
+                </td>
+              </tr>
+            </table>
+          </div>
+
+
+          <div>
+  <div id="Content">
+    <h3><a name="DiscoveryTransportReference-TheDiscoveryTransport"></a>The Discovery Transport</h3>
+    <p>The Discovery transport works just like the reliable transport, except that it uses a discovery agent to locate the list of uri to connect to.</p>
+    <h4><a name="DiscoveryTransportReference-ConfigurationSyntax"></a>Configuration Syntax</h4>
+    <p><b>discovery:(discoveryAgentURI)?transportOptions</b><br> or<br><b>discovery:discoveryAgentURI</b></p>
+    <h5><a name="DiscoveryTransportReference-TransportOptions"></a>Transport Options</h5>
+    <p class="paragraph">
+      <table class="confluenceTable">
+        <tbody>
+          <tr>
+            <th class="confluenceTh">Option Name</th>
+            <th class="confluenceTh">Default Value</th>
+            <th class="confluenceTh">Description</th>
+          </tr>
+          <tr>
+            <td class="confluenceTd">initialReconnectDelay</td>
+            <td class="confluenceTd">10</td>
+            <td class="confluenceTd">How long to wait before the first reconnect attempt</td>
+          </tr>
+          <tr>
+            <td class="confluenceTd">maxReconnectDelay</td>
+            <td class="confluenceTd">30000</td>
+            <td class="confluenceTd">The maximum amount of time we ever wait between reconnect attempts</td>
+          </tr>
+          <tr>
+            <td class="confluenceTd">useExponentialBackOff</td>
+            <td class="confluenceTd">true</td>
+            <td class="confluenceTd">Should an exponential backoff be used btween reconnect attempts</td>
+          </tr>
+          <tr>
+            <td class="confluenceTd">backOffMultiplier</td>
+            <td class="confluenceTd">2</td>
+            <td class="confluenceTd">The exponent used in the exponential backoff attempts</td>
+          </tr>
+          <tr>
+            <td class="confluenceTd">maxReconnectAttempts</td>
+            <td class="confluenceTd">0</td>
+            <td class="confluenceTd">If not 0, then this is the maximum number of reconnect attempts before an error is sent back to the client</td>
+          </tr>
+        </tbody>
+      </table>
+    </p>
+    <h5><a name="DiscoveryTransportReference-ExampleURI"></a>Example URI</h5>
+    <p class="paragraph">
+      <div class="preformatted">
+        <div class="preformattedContent"><pre>discovery:(multicast://default)?initialReconnectDelay=100
+</pre></div>
+      </div>
+    </p>
+  </div>
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+

Added: incubator/activemq/site/Does+ActiveMQ+support+clustering
URL: http://svn.apache.org/viewcvs/incubator/activemq/site/Does%2BActiveMQ%2Bsupport%2Bclustering?rev=374430&view=auto
==============================================================================
--- incubator/activemq/site/Does+ActiveMQ+support+clustering (added)
+++ incubator/activemq/site/Does+ActiveMQ+support+clustering Thu Feb  2 08:31:10 2006
@@ -0,0 +1,226 @@
+
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+
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+          <div id="page_title">
+            <table width="100%">
+              <tr>
+                <td>
+            Does ActiveMQ support clustering 
+                </td>
+                <td align="right">
+            
+                </td>
+              </tr>
+            </table>
+          </div>
+
+
+          <div>
+  <div id="Content">
+    <p>
+      <br>
+      <br> Yes, though there are various kinds of clustering. See <a href="Clustering" title="Clustering">this page on details</a></p>
+  </div>
+</div>
+
+          &nbsp;
+        </td>
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+              </td>
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+          <table>
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+
+</html>
+
+

Added: incubator/activemq/site/Does+ActiveMQ+support+my+SQL+database
URL: http://svn.apache.org/viewcvs/incubator/activemq/site/Does%2BActiveMQ%2Bsupport%2Bmy%2BSQL%2Bdatabase?rev=374430&view=auto
==============================================================================
--- incubator/activemq/site/Does+ActiveMQ+support+my+SQL+database (added)
+++ incubator/activemq/site/Does+ActiveMQ+support+my+SQL+database Thu Feb  2 08:31:10 2006
@@ -0,0 +1,224 @@
+
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+
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+    <title>ActiveMQ - Does ActiveMQ support my SQL database</title>
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+
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+                <a href="">Home</a>  | <a href="FAQ">FAQ</a> &gt; <a href="Persistence+Questions">Persistence&nbsp;Questions</a> &gt; Does ActiveMQ support my SQL database
+              </td>
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+                  <span id="Content"><span><a href="Download" title="Download">Download</a> | <span class="nobr"><a href="http://activemq.codehaus.org/maven/apidocs/" rel="nofollow">JavaDocs for 4.x</a></span> <span class="nobr"><a href="http://activemq.org/maven/activemq-3/activemq-core/apidocs/" rel="nofollow">3.x</a></span> | <a href="Source" title="Source">Source</a> | <span class="nobr"><a href="http://docs.codehaus.org/pages/listpages.action?key=ACTIVEMQ" rel="nofollow">Wiki</a></span> |<span class="nobr"><a href="irc://irc.codehaus.org/activemq" rel="nofollow">IRC</a></span> | <span class="nobr"><a href="http://servlet.uwyn.com/drone/log/hausbot/activemq" rel="nofollow">IRC Log</a></span> | <a href="Mailing+Lists" title="Mailing Lists">Mailing Lists</a> | <span class="nobr"><a href="http://forums.logicblaze.com/forums/show/1.page" rel="nofollow">Discussion Forum</a></span> | <span class="nobr"><a href="http://jira.logicblaze.com/jira/browse/AMQ" rel="nofollow">Support
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+
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+                <td>
+            Does ActiveMQ support my SQL database 
+                </td>
+                <td align="right">
+            
+                </td>
+              </tr>
+            </table>
+          </div>
+
+
+          <div>
+  <div id="Content">
+    <p>Quite possibly <img align="absmiddle" alt="" border=0 class="emoticon" height=20 src="/images/icons/emoticons/smile.gif" width=20>. See the <a href="JDBC+Support" title="JDBC Support">JDBC Support</a> page for details of how to configure for your database or how to let us know of a database which does not work. Also see <a href="Persistence" title="Persistence">Persistence</a></p>
+  </div>
+</div>
+
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+</html>
+
+

Added: incubator/activemq/site/Download
URL: http://svn.apache.org/viewcvs/incubator/activemq/site/Download?rev=374430&view=auto
==============================================================================
--- incubator/activemq/site/Download (added)
+++ incubator/activemq/site/Download Thu Feb  2 08:31:10 2006
@@ -0,0 +1,248 @@
+
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+  <head>
+    <link rel="stylesheet" href="site.css" type="text/css">
+
+
+
+    <title>ActiveMQ - Download</title>
+  </head>
+
+  <body>
+    <table width="100%" id="layout" style="padding:0px;margin0px;border-collapse:collapse;">
+      <tr>
+        <td colspan="3" style="padding:8px;">
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+            <tr id="header_row">
+              <td align="left" valign="middle" style="padding:0px;margin:0px;">
+                <span id="Content"><span><span class="nobr"><a href="http://incubator.apache.org/activemq" rel="nofollow"><img align="absmiddle" border=0 src="images/logo.gif"></a></span></span></span>
+
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+                <a href="">Home</a>  | Download
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+                  <span id="Content"><span><a href="Download" title="Download">Download</a> | <span class="nobr"><a href="http://activemq.codehaus.org/maven/apidocs/" rel="nofollow">JavaDocs for 4.x</a></span> <span class="nobr"><a href="http://activemq.org/maven/activemq-3/activemq-core/apidocs/" rel="nofollow">3.x</a></span> | <a href="Source" title="Source">Source</a> | <span class="nobr"><a href="http://docs.codehaus.org/pages/listpages.action?key=ACTIVEMQ" rel="nofollow">Wiki</a></span> |<span class="nobr"><a href="irc://irc.codehaus.org/activemq" rel="nofollow">IRC</a></span> | <span class="nobr"><a href="http://servlet.uwyn.com/drone/log/hausbot/activemq" rel="nofollow">IRC Log</a></span> | <a href="Mailing+Lists" title="Mailing Lists">Mailing Lists</a> | <span class="nobr"><a href="http://forums.logicblaze.com/forums/show/1.page" rel="nofollow">Discussion Forum</a></span> | <span class="nobr"><a href="http://jira.logicblaze.com/jira/browse/AMQ" rel="nofollow">Support
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+
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+              <td align="left">
+                <a href="http://docs.codehaus.org/spaces/rss.action?key=ACTIVEMQ&newPages=false">Site</a>
+              </td>
+            </tr>
+            <tr>
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+        <td id="rightColumn" valign="top">
+
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+              <tr>
+                <td>
+            Download 
+                </td>
+                <td align="right">
+            
+                </td>
+              </tr>
+            </table>
+          </div>
+
+
+          <div>
+  <div id="Content">
+    <h2><a name="Download-LatestReleases"></a>Latest Releases</h2>
+    <p>On this page you can find the binary and source distributions of ActiveMQ.</p>
+    <p>The the latest release is <a href="ActiveMQ+3.2.1+Release" title="ActiveMQ 3.2.1 Release">ActiveMQ 3.2.1 Release</a>. Other releases are available</p>
+    <ul>
+      <li><span class="nobr"><a href="http://people.apache.org/~chirino/incubator-activemq-4.0-M4/distributions/" rel="nofollow">4.0-M4</a></span></li>
+      <li><span class="nobr"><a href="http://dist.codehaus.org/activemq/distributions" rel="nofollow">Older milestone releases</a></span></li>
+      <li><span class="nobr"><a href="http://cvs.apache.org/repository/incubator-activemq/distributions/" rel="nofollow">Current development SNAPSHOT release</a></span></li>
+    </ul>
+    <h2><a name="Download-PreviousReleases"></a>Previous Releases</h2>
+    <ul>
+      <li><a href="ActiveMQ+1.0+Release" title="ActiveMQ 1.0 Release">ActiveMQ 1.0 Release</a></li>
+      <li><a href="ActiveMQ+1.1+Release" title="ActiveMQ 1.1 Release">ActiveMQ 1.1 Release</a></li>
+      <li><a href="ActiveMQ+1.2+Release" title="ActiveMQ 1.2 Release">ActiveMQ 1.2 Release</a></li>
+      <li><a href="ActiveMQ+1.3+Release" title="ActiveMQ 1.3 Release">ActiveMQ 1.3 Release</a></li>
+      <li><a href="ActiveMQ+1.4+Release" title="ActiveMQ 1.4 Release">ActiveMQ 1.4 Release</a></li>
+      <li><a href="ActiveMQ+1.5+Release" title="ActiveMQ 1.5 Release">ActiveMQ 1.5 Release</a></li>
+      <li><a href="ActiveMQ+2.0+Release" title="ActiveMQ 2.0 Release">ActiveMQ 2.0 Release</a></li>
+      <li><a href="ActiveMQ+2.1+Release" title="ActiveMQ 2.1 Release">ActiveMQ 2.1 Release</a></li>
+      <li><a href="ActiveMQ+3.0+Release" title="ActiveMQ 3.0 Release">ActiveMQ 3.0 Release</a></li>
+      <li><a href="ActiveMQ+3.1+Release" title="ActiveMQ 3.1 Release">ActiveMQ 3.1 Release</a></li>
+      <li><a href="ActiveMQ+3.2+Release" title="ActiveMQ 3.2 Release">ActiveMQ 3.2 Release</a></li>
+      <li><a href="ActiveMQ+3.2.1+Release" title="ActiveMQ 3.2.1 Release">ActiveMQ 3.2.1 Release</a></li>
+    </ul>
+    <h2><a name="Download-JustneedtheJars%3F"></a>Just need the Jars?</h2>
+    <p>You can download a jar of ActiveMQ <span class="nobr"><a href="http://dist.codehaus.org/activemq/jars" rel="nofollow">here</a></span></p>
+  </div>
+</div>
+
+          &nbsp;
+        </td>
+      </tr>
+      <tr>
+        <td colspan="3" id="footer">
+          <table width="100%"> 
+            <tr>
+              <td align="left" valign="top">
+          
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+              <td align="right" valign="top">
+          <a style="color:#999;" href="http://docs.codehaus.org/pages/editpage.action?spaceKey=ACTIVEMQ&title=Download">[ edit ]</a>
+              </td>
+            </tr>
+          <table>
+        </td>
+      </tr>
+    </table>
+  </body>
+
+</html>
+
+

Added: incubator/activemq/site/Durable+Queue+Memory+Management
URL: http://svn.apache.org/viewcvs/incubator/activemq/site/Durable%2BQueue%2BMemory%2BManagement?rev=374430&view=auto
==============================================================================
--- incubator/activemq/site/Durable+Queue+Memory+Management (added)
+++ incubator/activemq/site/Durable+Queue+Memory+Management Thu Feb  2 08:31:10 2006
@@ -0,0 +1,241 @@
+
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
+<html>
+  <head>
+    <link rel="stylesheet" href="site.css" type="text/css">
+
+
+
+    <title>ActiveMQ - Durable Queue Memory Management</title>
+  </head>
+
+  <body>
+    <table width="100%" id="layout" style="padding:0px;margin0px;border-collapse:collapse;">
+      <tr>
+        <td colspan="3" style="padding:8px;">
+          <table width="100%" id="banner" style="padding:0px;margin:0px">
+            <tr id="header_row">
+              <td align="left" valign="middle" style="padding:0px;margin:0px;">
+                <span id="Content"><span><span class="nobr"><a href="http://incubator.apache.org/activemq" rel="nofollow"><img align="absmiddle" border=0 src="images/logo.gif"></a></span></span></span>
+
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+              
+            </tr>
+          </table>
+        </td>
+      </tr>
+      <tr>
+        <td colspan="3" id="breadcrumbs">
+          <table width="100%" id="banner" style="padding:0px;margin:0px">
+            <tr>
+              <td align="left">
+                <a href="">Home</a>  | <a href="Navigation">Navigation</a> &gt; <a href="ActiveMQ+4.0">ActiveMQ&nbsp;4.0</a> &gt; <a href="Design+Documents">Design&nbsp;Documents</a> &gt; Durable Queue Memory Management
+              </td>
+              <td align="right">
+                  <span id="Content"><span><a href="Download" title="Download">Download</a> | <span class="nobr"><a href="http://activemq.codehaus.org/maven/apidocs/" rel="nofollow">JavaDocs for 4.x</a></span> <span class="nobr"><a href="http://activemq.org/maven/activemq-3/activemq-core/apidocs/" rel="nofollow">3.x</a></span> | <a href="Source" title="Source">Source</a> | <span class="nobr"><a href="http://docs.codehaus.org/pages/listpages.action?key=ACTIVEMQ" rel="nofollow">Wiki</a></span> |<span class="nobr"><a href="irc://irc.codehaus.org/activemq" rel="nofollow">IRC</a></span> | <span class="nobr"><a href="http://servlet.uwyn.com/drone/log/hausbot/activemq" rel="nofollow">IRC Log</a></span> | <a href="Mailing+Lists" title="Mailing Lists">Mailing Lists</a> | <span class="nobr"><a href="http://forums.logicblaze.com/forums/show/1.page" rel="nofollow">Discussion Forum</a></span> | <span class="nobr"><a href="http://jira.logicblaze.com/jira/browse/AMQ" rel="nofollow">Support
 </a></span></span></span>
+
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+          </table>
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+    <li><a href="Run+Broker" title="Run Broker">Running a Broker</a></li>
+    <li><a href="Examples" title="Examples">Examples</a></li>
+    <li><a href="How+can+I+monitor+ActiveMQ" title="How can I monitor ActiveMQ">Monitoring the Broker</a></li>
+    <li><a href="Xml+Configuration" title="Xml Configuration">Xml Configuration</a></li>
+    <li><a href="Xml+Reference" title="Xml Reference">Xml Reference</a></li>
+    <li><a href="Use+Cases" title="Use Cases">Use Cases</a></li>
+    <li><a href="Topologies" title="Topologies">Topologies</a></li>
+    <li><a href="Configuring+Transports" title="Configuring Transports">Configuring Transports</a></li>
+    <li><a href="How+do+I+embed+a+Broker+inside+a+Connection" title="How do I embed a Broker inside a Connection">Embedded Brokers</a></li>
+    <li><a href="JMeter+Performance+Tests" title="JMeter Performance Tests">Performance Testing</a></li>
+    <li><a href="Web+Samples" title="Web Samples">Web Samples</a></li>
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+                <td>
+            Durable Queue Memory Management 
+                </td>
+                <td align="right">
+            
+                </td>
+              </tr>
+            </table>
+          </div>
+
+
+          <div>
+  <div id="Content">
+    <p>The current 3.x code can have issues with massive queues with un-acknowledged messages; its complex due to consumption from multiple points in the queue, consumers coming &amp; going, selectors matching only certain points in the queue etc.</p>
+    <p>This page outlines design the design proposal.</p>
+    <h2><a name="DurableQueueMemoryManagement-TargetArea"></a>TargetArea</h2>
+    <p>Maintains TargetLists for each consumer (the messages that have matched one or more consumers's selectors and are gonna be used to try dispatch stuff to the consumer DispatchArea). TargetEntry objects are added to the TargetList as messages arrive from the Queue. </p>
+    <p>A TargetEntry can have either a direct Message reference or a CacheReference to an entry in a cache. </p>
+    <h3><a name="DurableQueueMemoryManagement-Eagerloading"></a>Eager loading</h3>
+    <p>Each TargetList has a watermark to indicate the first TargetEntry which is a CacheReference. The idea is that under ideal scenarios, each TargetList has the watermark equal to the high water mark (i.e. that there are enough direct message references in RAM).</p>
+    <p>So we can have a background thread increasing the watermark up to the ideal level - which means it starts at the current watermark and directly loads the objects; de-referencing the CacheReference and replacing with direct references. </p>
+    <h3><a name="DurableQueueMemoryManagement-PendingCache"></a>PendingCache</h3>
+    <p>TargetEntry objects added to the TargetList which are above the high watermark have their Message objects evicted from direct references into the PendingCache.</p>
+    <p>The Target eager loader will move objects from this cache to the TargetList when they are available. If they are not in the PendingCache, they are loaded from the QueueArea.</p>
+    <h3><a name="DurableQueueMemoryManagement-QueueArea"></a>QueueArea</h3>
+    <p>This represents the actual queue messages. There's also a matching HeadQueueCache which is a simple memory bound queue. FIFO so newer stuff is evicted from the end.</p>
+    <p>Back </p>
+    <h3><a name="DurableQueueMemoryManagement-LinkingtheCaches"></a>Linking the Caches</h3>
+    <p>The PendingCache and HeadQueueCache are linked together, along with the TargetArea/DispatchArea so that there is a fixed amount of RAM used in all the caches.</p>
+    <p>As the PendingCache grows, the HeadQueueCache shrinks. HeadQueueCache is only used for new consumers arriving. On startup this will stick around a while until lots of messages start being delivered to consumers where it'll shrink back to zero if there is sufficient dispatching.</p>
+    <p>Under heavy load, the HeadQueueCache will be pretty much empty unless new consumers come along.</p>
+  </div>
+</div>
+
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