{"id":16405,"date":"2021-06-14T17:04:53","date_gmt":"2021-06-14T15:04:53","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/htmladaptorserver-a-jmx-agent-with-html-presentation-for-weblogic\/"},"modified":"2025-10-24T09:38:47","modified_gmt":"2025-10-24T07:38:47","slug":"htmladaptorserver-a-jmx-agent-with-html-presentation-for-weblogic","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/htmladaptorserver-a-jmx-agent-with-html-presentation-for-weblogic\/","title":{"rendered":"HtmlAdaptorServer, A JMX Agent with HTML Presentation for WebLogic"},"content":{"rendered":"<p>In this <a href=\"https:\/\/www.dbi-services.com\/blog\/a-web-based-mbean-navigator-for-oracle-weblogic-wlst\/\">article<\/a>, I presented a little utility based on the SimpleHTTPServer jython module to visualize into an HTML page a WebLogic server&#8217;s configuration and run-time mbeans. I also mentioned that there are lots other tools out there for this purpose, albeit more aimed at run-time monitoring rather than viewing the configuration mbeans. Here, I&#8217;d like show another such tool, actually a java package to install in the target JVM. As such, it is a bit more intrusive but not that much. The package is called HtmlAdaptorServer. It can be downloaded from Oracle as the archive jmx-1_2-ri.zip and its library file jmxtools.jar added to the WebLogic server&#8217;s CLASSPATH. Once connected to the target&#8217;s JMX server as a JMX agent, it can be accessed from a browser through http on the specified port (default 8082) and the target&#8217;s run-time mbeans along with their properties can be displayed, and even edited if Read-Write. In addition, some mbeans methods can also be called.<\/p>\n<p>Let&#8217;s see how to use it in the context of a WebLogic domain.<\/p>\n<h2>Installation<\/h2>\n<p>The installation is quick and easy: just download the archive jmx-1_2-ri.zip from Oracle and extract its library jmxtools.jar:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1; highlight: []\">\n# get the jmx v1.2.1 reference implementation;\nexport work_dir=~\/HtmlAdaptorServer\nmkdir $work_dir\ncd $work_dir\nwget https:\/\/download.oracle.com\/otn-pub\/java\/jmx\/1.2-ri\/jmx-1_2-ri.zip\n\n# extract the relevant jar;\nunzip -x .\/jmx-1_2_1-ri.zip jmx-1_2_1-bin\/lib\/jmxtools.jar\n<\/pre>\n<p>Now, we need some code to connect the HTML Adaptor to the JMX server. It can also be run later as a stand-alone program, which is handy for testing it.<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1; highlight: []\">\n# save the class startHtmlAdaptor;\ncat - &lt;&lt;eoj &gt; startHtmlAdaptor.java\nimport java.lang.management.*;\nimport javax.management.*;\nimport com.sun.jdmk.comm.HtmlAdaptorServer;\n\npublic class startHtmlAdaptor{\n  public static void main(String[] args) {\n     int HtmlAdaptorPort;\n     System.out.println(\"In startHtmlAdaptor ... \");\n     MBeanServer mbean_server = ManagementFactory.getPlatformMBeanServer();\n     try {\n         if (args.length &gt;= 1)\n            HtmlAdaptorPort = Integer.parseInt(args[0]);\n         else\n            HtmlAdaptorPort = 8082;\n         HtmlAdaptorServer adapter = new HtmlAdaptorServer();\n         ObjectName adapterName = new ObjectName(\"com.HTMLbrowsing.jmx:name=htmladaptor,port=\" + HtmlAdaptorPort);\n         adapter.setPort(HtmlAdaptorPort);\n         mbean_server.registerMBean(adapter, adapterName);\n         System.out.println(\"starting HTML Adaptor agent on port \" + HtmlAdaptorPort);\n         adapter.start();\n     } catch (Exception e) {\n       e.printStackTrace();\n     }\n  }\n}\neoj\n\n# let's compile it;\nexport CLASSPATH=.:`pwd`\/jmx-1_2_1-bin\/lib\/jmxtools.jar\njavac startHtmlAdaptor.java\n<\/pre>\n<h2>Testing<\/h2>\n<p>In order to test it, let&#8217;s simply execute it. It will connect to its own JVM&#8217;s JMX server:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1; highlight: []\">\n$ java -cp .:jmxtools-1.2.1.jar startHTMLAgent 8881\nstarting the JMX agent... \nstarting HTML browsing on port 8881\n<\/pre>\n<p>Point your browser on http:\/\/localhost:8881. You&#8217;ll see the agent view below:<br \/>\n<a href=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/AgentView.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/AgentView.jpg\" alt=\"\" width=\"520\" height=\"949\" class=\"alignnone size-full wp-image-50270\" \/><\/a><br \/>\nYou can move around and notice that some properties are read-only while some others are read-write. Also, methods are presented that can be given parameters, if needed, and invoked.<\/p>\n<h2>Installation in a WebLogic domain<\/h2>\n<p>If the stand-alone agent works well, let&#8217;s move on with the installation in a WebLogic server. For our test, we&#8217;ll use the demo WebCenter domain available from Oracle as a downloadable VM. This domain uses WebLogic 12.2.1 and contains 3 managed servers in addition to the administration server. We&#8217;ll install the HtmlAdaptorServer JMX agent as a startup class so it connects to the each server&#8217;s JMX server and instrumentalize it. As it is a bit boring to manually edit the configuration from the administration console, let&#8217;s use the scripting tool wlst do do that by just copying and pasting the statements below:<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1; highlight: []\">\n# install it and the jmxtool in wl domain, here webcenter for testing;\nexport DOMAIN_BASE=\/oracle\/domains\nexport DOMAIN_HOME=${DOMAIN_BASE}\/webcenter\nexport APPLICATIONS_HOME=${DOMAIN_BASE}\/applications\/webcenter\ncp startHtmlAdaptor.class ${APPLICATIONS_HOME}\/.\ncp jmx-1_2_1-bin\/lib\/jmxtools.jar ${APPLICATIONS_HOME}\/.\n\n# start wlst;\ncd ${DOMAIN_HOME}\n. bin\/setDomainEnv.sh\n${COMMON_COMPONENTS_HOME}\/common\/bin\/wlst.sh\n\n# connect to the administrative server;\nconnect('weblogic', 'welcome1', 't3:\/\/localhost:7001\/console')\nedit()\nstartEdit()\n\n# install the startup class on all the 4 servers to browse with distinct adaptor ports starting with 6000 and up to 6003;\n# for the AdminServer;\ncd('\/StartupClasses')\ncreate('startHtmlAdaptor-AdminServer', 'StartupClasses')\ncd('startHtmlAdaptor-AdminServer')\ncmo.setClassName('startHtmlAdaptor')\ncmo.setArguments('6000')\ncmo.addTarget(getMBean('\/Servers\/AdminServer'))\n\n# for the IBR_server1;\ncd('\/StartupClasses')\ncreate('startHtmlAdaptor-IBR_server1', 'StartupClasses')\ncd('startHtmlAdaptor-IBR_server1')\ncmo.setClassName('startHtmlAdaptor')\ncmo.setArguments('6001')\ncmo.addTarget(getMBean('\/Servers\/IBR_server1'))\n\n# for the UCM_server1;\ncd('\/StartupClasses')\ncreate('startHtmlAdaptor-UCM_server1', 'StartupClasses')\ncd('startHtmlAdaptor-UCM_server1')\ncmo.setClassName('startHtmlAdaptor')\ncmo.setArguments('6002')\ncmo.addTarget(getMBean('\/Servers\/UCM_server1'))\n\n# for the WC_Portal;\ncd('\/StartupClasses')\ncreate('startHtmlAdaptor-WC_Portal', 'StartupClasses')\ncd('startHtmlAdaptor-WC_Portal')\ncmo.setClassName('startHtmlAdaptor')\ncmo.setArguments('6003')\ncmo.addTarget(getMBean('\/Servers\/WC_Portal'))\n\n# save and exit;\nsave()\nactivate()\nexit()\n<\/pre>\n<p>The stand-alone program above must now be added to the domain&#8217;s CLASSPATH so it can be accessed. We use the domain&#8217;s setUserOverrides.sh script for it is sourced automatically by the other WebLogic scripts of the domain when they are executed.<\/p>\n<pre class=\"brush: bash; gutter: true; first-line: 1; highlight: []\">\n# add the new class startHtmlAdaptor.class to the CLASSPATH;\ncat - &gt;&gt; ${DOMAIN_HOME}\/bin\/setUserOverrides.sh\nexport CLASSPATH=${APPLICATIONS_HOME}\/jmxtools.jar:${APPLICATIONS_HOME}:$CLASSPATH\neoc\n<\/pre>\n<p>Restart the domain using whatever wrappers you have configured. This is perhaps the most customized area of WebLogic administration ! The out of the box stopManagedWebLogic.sh, stopWebLogic.sh, startWebLogic.sh and startManagedWebLogic.sh in ${DOMAIN_HOME}\/bin can be used too.<\/p>\n<h2>Testing in the WebLogic domain<\/h2>\n<p>Once the domain has started, point your browser to each one of the agents listening on http:\/\/localhost:600[0-3] and check the information they obtain from their respective server. Here is the administration server&#8217;s agent view:<br \/>\n<a href=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/AgentView-webcenter-admin.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/AgentView-webcenter-admin.jpg\" alt=\"\" width=\"1098\" height=\"1247\" class=\"alignnone size-full wp-image-50273\" \/><\/a><\/p>\n<p>Here is an exemple for the mbean Security_Name=myrealmDefaultIdentityAsserter running in the managed server IBR_server1&#8217;s JMX agent accessible here: http:\/\/localhost:6001\/ViewObjectRes\/\/Security%3AName%3DmyrealmDefaultIdentityAsserter.<br \/>\n<a href=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/AgentView-webcenter-IBR_server1.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/AgentView-webcenter-IBR_server1.jpg\" alt=\"\" width=\"2048\" height=\"1156\" class=\"alignnone size-full wp-image-50274\" \/><\/a><\/p>\n<p>This can be compared with the view from SimpleHTTPServer presented in the aforementioned article and accessible here for example:<br \/>\nhttp:\/\/localhost:10001\/DomainServices\/DomainRuntimeService\/DomainConfiguration\/webcenter\/SecurityConfiguration\/webcenter\/DefaultRealm\/myrealm\/AuthenticationProviders\/DefaultIdentityAsserter\/Realm\/myrealm\/AuthenticationProviders\/DefaultIdentityAsserter<br \/>\n<a href=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/SimpleHTTPServer-html.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/SimpleHTTPServer-html.jpg\" alt=\"\" width=\"2048\" height=\"587\" class=\"alignnone size-full wp-image-50275\" \/><\/a><\/p>\n<p>We notice that clicking on a property of MBean pops up its description. Also, a list of the current MBean&#8217;s operations are displayed at the bottom and can be invoked, some are parameterless and some requires one or more parameters.<br \/>\nReferenced mbeans can be digged further by clicking on their value displayed in the rightmost column, e.g. for the Realm mbean :<br \/>\n<a href=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/AgentView-webcenter-IBR_server1-2.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/AgentView-webcenter-IBR_server1-2.png\" alt=\"\" width=\"300\" height=\"160\" class=\"alignnone size-medium wp-image-50276\" \/><\/a><\/p>\n<h2>Conclusion<\/h2>\n<p>The HtmlAdaptorServer agent presents a nice HTML interface to the run-time mbeans. Unlike a stand-alone tool such as jconsole, it requires to be installed in the servers to observe but this step is quite smooth. It is a tool aimed mostly at developers who need to interactively troubleshoot their mbeans in development where they can change some properties if needed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In this article, I presented a little utility based on the SimpleHTTPServer jython module to visualize into an HTML page a WebLogic server&#8217;s configuration and run-time mbeans. I also mentioned that there are lots other tools out there for this purpose, albeit more aimed at run-time monitoring rather than viewing the configuration mbeans. Here, I&#8217;d [&hellip;]<\/p>\n","protected":false},"author":40,"featured_media":16406,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[197],"tags":[2349,2350,647],"type_dbi":[],"class_list":["post-16405","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-application-integration-middleware","tag-htmladaptorserver","tag-startup-class","tag-weblogic"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>HtmlAdaptorServer, A JMX Agent with HTML Presentation for WebLogic - dbi Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dbi-services.com\/blog\/htmladaptorserver-a-jmx-agent-with-html-presentation-for-weblogic\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"HtmlAdaptorServer, A JMX Agent with HTML Presentation for WebLogic\" \/>\n<meta property=\"og:description\" content=\"In this article, I presented a little utility based on the SimpleHTTPServer jython module to visualize into an HTML page a WebLogic server&#8217;s configuration and run-time mbeans. I also mentioned that there are lots other tools out there for this purpose, albeit more aimed at run-time monitoring rather than viewing the configuration mbeans. Here, I&#8217;d [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dbi-services.com\/blog\/htmladaptorserver-a-jmx-agent-with-html-presentation-for-weblogic\/\" \/>\n<meta property=\"og:site_name\" content=\"dbi Blog\" \/>\n<meta property=\"article:published_time\" content=\"2021-06-14T15:04:53+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-24T07:38:47+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/AgentView.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"520\" \/>\n\t<meta property=\"og:image:height\" content=\"949\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Middleware Team\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Middleware Team\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"6 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/htmladaptorserver-a-jmx-agent-with-html-presentation-for-weblogic\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/htmladaptorserver-a-jmx-agent-with-html-presentation-for-weblogic\/\"},\"author\":{\"name\":\"Middleware Team\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/8d8563acfc6e604cce6507f45bac0ea1\"},\"headline\":\"HtmlAdaptorServer, A JMX Agent with HTML Presentation for WebLogic\",\"datePublished\":\"2021-06-14T15:04:53+00:00\",\"dateModified\":\"2025-10-24T07:38:47+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/htmladaptorserver-a-jmx-agent-with-html-presentation-for-weblogic\/\"},\"wordCount\":728,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/htmladaptorserver-a-jmx-agent-with-html-presentation-for-weblogic\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.dbi-services.com\/blog\/wp-content\/uploads\/sites\/2\/2022\/04\/AgentView.jpg\",\"keywords\":[\"HtmlAdaptorServer\",\"startup class\",\"WebLogic\"],\"articleSection\":[\"Application integration &amp; 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