{"id":267,"date":"2018-01-19T10:03:59","date_gmt":"2018-01-19T08:03:59","guid":{"rendered":"http:\/\/www.descher.at\/descher-vu\/?p=267"},"modified":"2018-01-19T10:21:59","modified_gmt":"2018-01-19T08:21:59","slug":"the-pain-of-configuring-jsp-in-jetty-osgi","status":"publish","type":"post","link":"http:\/\/www.descher.at\/descher-vu\/2018\/01\/the-pain-of-configuring-jsp-in-jetty-osgi\/","title":{"rendered":"The pain of configuring JSP in Jetty OSGi"},"content":{"rendered":"

As part of a recent project I want to run mitreid connect server<\/a> embedded within the Elexis-Server<\/a> Neon.3 based Jetty instance (that is version 9.3.9.v20160517).<\/p>\n

Despite the excellent Jetty documentation<\/a> on this version, I faced major trouble on getting to run this right.<\/p>\n

My status \/ approach was this: First of, I want to run the plain war file provided within a WebAppContext of the Jetty container. This did not prove to be much of a problem, a simple Activator like this achieved this:<\/p>\n

\r\n@Override\r\npublic void start(BundleContext context) throws Exception {\r\n\tWebAppContext webapp = new WebAppContext();\r\n\tDictionary props = new Hashtable();\r\n\tprops.put("war", "lib\/openid-connect-server-webapp.war");\r\n\tprops.put("contextPath", "\/openid");\r\n\tprops.put("managedServerName", "defaultJettyServer");\r\n\tcontext.registerService(ContextHandler.class.getName(), webapp, props);\r\n}\r\n<\/pre>\n
But now the real trouble started – J S P !<\/p>\n
The trouble can be broken down into three steps<\/p>\n
    \n
  1. Configuring the JSP implementation\n
  2. Setting up the JSTL (Standard Tag Library)\n
  3. Configuring the WebAppContext to use all of this\n<\/ol>\n
    Configuring JSP (Apache Jasper implementation)<\/b><\/p>\n
    This is pretty much straightforward, as documented in Using JSPs<\/a>.
    \nJust one thing is a little hidden – you additionally need apache aries.<\/p>\n
    Here goes a (hopefully) complete list<\/p>\n
    \r\n      id="javax.servlet.jsp.jstl"\r\n      id="org.apache.aries.spifly.dynamic.bundle"\r\n      id="org.apache.aries.util"\r\n      id="org.eclipse.core.commands"\r\n      id="org.eclipse.core.expressions"\r\n      id="org.eclipse.core.filesystem"\r\n      id="org.eclipse.core.resources"\r\n      id="org.eclipse.jdt.core"\r\n      id="org.eclipse.jetty.apache-jsp"\r\n      id="org.eclipse.jetty.osgi.boot.jsp"\r\n      id="org.eclipse.text"\r\n      id="org.glassfish.web.javax.servlet.jsp.jstl"\r\n      id="org.mortbay.jasper.apache-el"\r\n      id="org.mortbay.jasper.apache-jsp"\r\n      id="org.objectweb.asm"\r\n      id="org.objectweb.asm.commons"\r\n      id="org.objectweb.asm.tree"\r\n<\/pre>\n
    Setting up the JSTL (Glassfish approach)<\/b><\/p>\n
    This is where I started to have problems. Documentation says to include org.glassfish.web:javax.servlet.jsp.jstl-1.2.2.jar<\/em> which did not work out using Java 8. Eclipse complained with<\/p>\n
    \"\"<\/a><\/p>\n
    I could track this down<\/a> and reverted to org.glassfish.web:javax.servlet.jsp.jstl-1.5.0-b03.jar<\/em> to solve this.<\/p>\n
    Configuring the WebAppContext to use all of this<\/b><\/p>\n
    At least the dependencies seemed to be satifisied by now – but did it start? No<\/strong> – but
    \na new Exception occured<\/p>\n
    \r\n\r\n2018-01-18 15:21:13,280 WARN  o.e.jetty.servlet.ServletHandler - \r\norg.apache.jasper.JasperException: Unable to compile class for JSP\r\n\tat org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:600) ~[org.mortbay.jasper.apache-jsp_8.0.33.jar:2.3]\r\n\tat org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:363) ~[org.mortbay.jasper.apache-jsp_8.0.33.jar:2.3]\r\n\tat org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396) ~[org.mortbay.jasper.apache-jsp_8.0.33.jar:2.3]\r\n...\r\nCaused by: java.lang.NullPointerException: null\r\n\tat org.apache.jasper.JspCompilationContext.getTldResourcePath(JspCompilationContext.java:551) ~[org.mortbay.jasper.apache-jsp_8.0.33.jar:2.3]\r\n\tat org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:420) ~[org.mortbay.jasper.apache-jsp_8.0.33.jar:2.3]\r\n\r\n<\/pre>\n
    This post<\/a> left me with some
    \nhints on what could be the problem. It breaks down to the JettyJasperInitializer#onStartup<\/em> not being called and some configurations missing. <\/p>\n
    Some more searches brought me to the embedded-jetty-jsp<\/a> sample project where this was initialized. (I had to use the non-jetty-annotations approach, as I also use org.eclipse.gemini.naming in the container, already providing a JNDI implementation).<\/p>\n
    I extracted the JspStarter<\/em> from the mentioned project, and modified the Activator<\/p>\n
    \r\nwebapp.addBean(new JspStarter(webapp.getServletContext().getContextHandler()));\r\n<\/pre>\n
    and now it works – the journey continues! Hope this blog spares somebody else some trouble!<\/p>\n","protected":false},"excerpt":{"rendered":"
    As part of a recent project I want to run mitreid connect server embedded within the Elexis-Server Neon.3 based Jetty instance (that is version 9.3.9.v20160517). Despite the excellent Jetty documentation on this version, I faced major trouble on getting to run this right. My status \/ approach was this: First of, I want to run … The pain of configuring JSP in Jetty OSGi<\/span> weiterlesen →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1,4,20],"tags":[],"_links":{"self":[{"href":"http:\/\/www.descher.at\/descher-vu\/wp-json\/wp\/v2\/posts\/267"}],"collection":[{"href":"http:\/\/www.descher.at\/descher-vu\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.descher.at\/descher-vu\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.descher.at\/descher-vu\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.descher.at\/descher-vu\/wp-json\/wp\/v2\/comments?post=267"}],"version-history":[{"count":19,"href":"http:\/\/www.descher.at\/descher-vu\/wp-json\/wp\/v2\/posts\/267\/revisions"}],"predecessor-version":[{"id":287,"href":"http:\/\/www.descher.at\/descher-vu\/wp-json\/wp\/v2\/posts\/267\/revisions\/287"}],"wp:attachment":[{"href":"http:\/\/www.descher.at\/descher-vu\/wp-json\/wp\/v2\/media?parent=267"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.descher.at\/descher-vu\/wp-json\/wp\/v2\/categories?post=267"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.descher.at\/descher-vu\/wp-json\/wp\/v2\/tags?post=267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}