[JENKINS-51820] Removing Java Web Start support

bom/pom.xml

@@ -261,31 +261,6 @@ THE SOFTWARE.
         <artifactId>instance-identity</artifactId>
         <version>2.2</version>
       </dependency>
-      <dependency>
-        <groupId>org.jenkins-ci.modules</groupId>
-        <artifactId>launchd-slave-installer</artifactId>
-        <version>1.2</version>
-      </dependency>
-      <dependency>
-        <groupId>org.jenkins-ci.modules</groupId>
-        <artifactId>slave-installer</artifactId>
-        <version>1.7</version>
-      </dependency>
-      <dependency>
-        <groupId>org.jenkins-ci.modules</groupId>
-        <artifactId>systemd-slave-installer</artifactId>
-        <version>1.1</version>
-      </dependency>
-      <dependency>
-        <groupId>org.jenkins-ci.modules</groupId>
-        <artifactId>upstart-slave-installer</artifactId>
-        <version>1.1</version>
-      </dependency>
-      <dependency>
-        <groupId>org.jenkins-ci.modules</groupId>
-        <artifactId>windows-slave-installer</artifactId>
-        <version>2.0</version>
-      </dependency>
       <dependency>
         <groupId>org.jfree</groupId>
         <artifactId>jfreechart</artifactId>

core/src/main/java/hudson/slaves/JNLPLauncher.java

@@ -36,7 +36,6 @@
 import jenkins.model.Jenkins;
 import jenkins.slaves.RemotingWorkDirSettings;
 import jenkins.util.SystemProperties;
-import jenkins.util.java.JavaUtils;
 import jenkins.websocket.WebSockets;
 import org.jenkinsci.Symbol;
 import org.kohsuke.accmod.Restricted;
@@ -67,11 +66,10 @@ public class JNLPLauncher extends ComputerLauncher {
     public final String tunnel;
 
     /**
-     * Additional JVM arguments. Can be null.
-     * @since 1.297
+     * @deprecated No longer used.
      */
-    @CheckForNull
-    public final String vmargs;
+    @Deprecated
+    public final transient String vmargs = null;
 
     @NonNull
     private RemotingWorkDirSettings workDirSettings = RemotingWorkDirSettings.getEnabledDefaults();
@@ -103,10 +101,20 @@ public JNLPLauncher(@CheckForNull String tunnel, @CheckForNull String vmargs, @C
         }
     }
 
+    // TODO cannot easily make tunnel into a @DataBoundSetter because then the @DataBoundConstructor would be on a no-arg constructor
+    // which is already defined and deprecated. Could retroactively let no-arg constructor use default for workDirSettings,
+    // which would be a behavioral change only for callers of the Java constructor (unlikely).
     @DataBoundConstructor
+    public JNLPLauncher(@CheckForNull String tunnel) {
+        this.tunnel = Util.fixEmptyAndTrim(tunnel);
+    }
+
+    /**
+     * @deprecated use {@link JNLPLauncher#JNLPLauncher(String)}
+     */
+    @Deprecated
     public JNLPLauncher(@CheckForNull String tunnel, @CheckForNull String vmargs) {
         this.tunnel = Util.fixEmptyAndTrim(tunnel);
-        this.vmargs = Util.fixEmptyAndTrim(vmargs);
     }
 
     /**
@@ -249,22 +257,6 @@ public FormValidation doCheckWebSocket(@QueryParameter boolean webSocket, @Query
 
     }
 
-    /**
-     * Returns true if Java Web Start button should be displayed.
-     * Java Web Start is only supported when the Jenkins server is
-     * running with Java 8.  Earlier Java versions are not supported by Jenkins.
-     * Later Java versions do not support Java Web Start.
-     *
-     * This flag is checked in {@code config.jelly} before displaying the
-     * Java Web Start button.
-     * @return {@code true} if Java Web Start button should be displayed.
-     * @since 2.153
-     */
-    @Restricted(NoExternalUse.class) // Jelly use
-    public boolean isJavaWebStartSupported() {
-        return JavaUtils.isRunningWithJava8OrBelow();
-    }
-
     /**
      * Overrides the url that inbound TCP agents should connect to
      * as advertised in the agent.jnlp file. If not set, the default

core/src/main/resources/hudson/slaves/JNLPLauncher/config.jelly

@@ -35,8 +35,5 @@ THE SOFTWARE.
     <f:entry title="${%Tunnel connection through}" help="/help/system-config/master-slave/jnlp-tunnel.html">
       <f:textbox field="tunnel"/>
     </f:entry>
-    <f:entry title="${%JVM options}" field="vmargs">
-      <f:textbox />
-    </f:entry>
   </f:advanced>
 </j:jelly>

core/src/main/resources/hudson/slaves/JNLPLauncher/help.properties

@@ -22,13 +22,9 @@
 
 blurb=\
   Allows an agent to be connected to the Jenkins controller whenever it is ready.<br>\
-  In one mode, <a href="https://en.wikipedia.org/wiki/Java_Web_Start" rel="noopener noreferrer" target="_blank">Java Web Start</a> is used. \
-  In this case, a JNLP file must be opened on the agent machine, \
-  which will establish a TCP connection to the Jenkins controller. \
-  (Other launch methods use a JNLP file but not Java Web Start, or do not use a JNLP file at all.)<br>\
+  The agent machine will establish a TCP connection to the Jenkins controller. \
   This means that the agent need not be reachable from the controller; \
   the agent just needs to be able to reach the controller. \
   If you have enabled security via the <i>Configure Global Security</i> page, \
-  you can customize the port on which the Jenkins controller will listen for incoming agent connections.<br>\
-  By default, the agent will launch a GUI, but it is also possible to run \
-  an agent without a GUI, for example as a Windows service.
+  you can customize the port on which the Jenkins controller will listen for incoming agent connections \
+  (unnecessary when using WebSocket mode).

core/src/main/resources/hudson/slaves/JNLPLauncher/main.jelly

@@ -33,58 +33,30 @@ THE SOFTWARE.
     </j:when>
     <j:when test="${it.offline and !it.temporarilyOffline}">
       <j:if test="${h.hasPermission(it, it.CONNECT)}">
-        <p>
-          ${%Connect agent to Jenkins one of these ways:}
-        </p>
-        <ul>
-          <j:if test="${it.launcher.javaWebStartSupported}">
-            <li>
-              <p>
-                <a href="jenkins-agent.jnlp" id="jnlp-link">
-                  <img src="${imagesURL}/webstart.gif" alt="${%launch agent}" />
-                </a>
-                ${%Launch agent from browser}
-              </p>
-            </li>
-          </j:if>
+          <j:set var="jenkinsURL" value="${h.inferHudsonURL(request)}"/>
           <j:choose>
             <j:when test="${it.ACL.hasPermission(app.ANONYMOUS, it.CONNECT)}">
-              <li>
                 <p>
                   ${%Run from agent command line:}
                 </p>
-                <pre>javaws ${h.inferHudsonURL(request)}${it.url}jenkins-agent.jnlp</pre>
-              </li>
-              <li>
-                <p>
-                  ${%Or if the agent is headless:}
-                </p>
-                <pre>java${it.launcher.vmargs == null ? '' : ' ' + it.launcher.vmargs} -jar <a href="${rootURL}/jnlpJars/agent.jar">agent.jar</a> -jnlpUrl ${h.inferHudsonURL(request)}${it.url}jenkins-agent.jnlp ${it.launcher.getWorkDirOptions(it)}</pre>
-              </li>
+                <pre>curl -sO ${jenkinsURL}jnlpJars/agent.jar
+java -jar <a href="${rootURL}/jnlpJars/agent.jar">agent.jar</a> -jnlpUrl ${jenkinsURL}${it.url}jenkins-agent.jnlp ${it.launcher.getWorkDirOptions(it)}</pre>
             </j:when>
             <j:otherwise>
-              <li>
                 <p>
                   ${%Run from agent command line:}
                 </p>
                 <!-- TODO conceal secret w/ JS if possible -->
-                <pre>java${it.launcher.vmargs == null ? '' : ' ' + it.launcher.vmargs} -jar <a href="${rootURL}/jnlpJars/agent.jar">agent.jar</a> -jnlpUrl ${h.inferHudsonURL(request)}${it.url}jenkins-agent.jnlp -secret ${it.jnlpMac} ${it.launcher.getWorkDirOptions(it)}</pre>
+                <pre>curl -sO ${jenkinsURL}jnlpJars/agent.jar
+java -jar <a href="${rootURL}/jnlpJars/agent.jar">agent.jar</a> -jnlpUrl ${jenkinsURL}${it.url}jenkins-agent.jnlp -secret ${it.jnlpMac} ${it.launcher.getWorkDirOptions(it)}</pre>
                 <p>
-                  ${%Run from agent command line, with the secret stored in a file:}
+                  ${%Or run from agent command line, with the secret stored in a file:}
                 </p>
                 <pre>echo ${it.jnlpMac} > secret-file
-java${it.launcher.vmargs == null ? '' : ' ' + it.launcher.vmargs} -jar <a href="${rootURL}/jnlpJars/agent.jar">agent.jar</a> -jnlpUrl ${h.inferHudsonURL(request)}${it.url}jenkins-agent.jnlp -secret @secret-file ${it.launcher.getWorkDirOptions(it)}</pre>
-              </li>
+curl -sO ${jenkinsURL}jnlpJars/agent.jar
+java -jar <a href="${rootURL}/jnlpJars/agent.jar">agent.jar</a> -jnlpUrl ${jenkinsURL}${it.url}jenkins-agent.jnlp -secret @secret-file ${it.launcher.getWorkDirOptions(it)}</pre>
             </j:otherwise>
           </j:choose>
-        </ul>
-        <!--
-        <p>
-          <a href="custom-jnlp" style="margin-left:3em">
-            (tweak launch parameters)
-          </a>
-        </p>
-        -->
       </j:if>
     </j:when>
     <j:otherwise>

core/src/main/resources/hudson/slaves/SlaveComputer/jenkins-agent.jnlp.jelly

@@ -27,40 +27,11 @@ THE SOFTWARE.
   <l:view contentType="application/x-java-jnlp-file">
   <j:invokeStatic var="rootURL" className="hudson.slaves.JNLPLauncher" method="getInboundAgentUrl" />
 
-  <!--
-    See https://www.dallaway.com/acad/webstart/ for obtaining the certificate.
-  -->
-
-    <!-- See https://docs.oracle.com/javase/8/docs/technotes/guides/javaws/developersguide/syntax.html for the syntax -->
-    <jnlp spec="1.0+"
-        codebase="${rootURL}computer/${h.encode(it.node.nodeName)}/">
-
-      <information>
-        <title>Agent for ${it.displayName}</title>
-        <vendor>Jenkins project</vendor>
-        <homepage href="https://jenkins-ci.org/"/>
-      </information>
-
-      <security>
-        <all-permissions/>
-      </security>
-
+    <!-- JavaWebStart is no longer supported, but a subset of the syntax is retained for compatibility reasons: hudson.remoting.Launcher.parseJnlpArguments -->
+    <jnlp>
       <j:set var="launcher" value="${it.delegatedLauncher}"/>
 
-      <resources>
-        <j:set var="port" value="${request.getParameter('debugPort')}"/>
-        <j:choose>
-          <j:when test="${port!=null}">
-            <j2se version="1.8+" java-vm-args="${launcher.vmargs} -Xdebug -Xrunjdwp:transport=dt_socket,server=y,address=${port}" />
-          </j:when>
-          <j:otherwise>
-            <j2se version="1.8+" java-vm-args="${launcher.vmargs}"/>
-          </j:otherwise>
-        </j:choose>
-        <jar href="${rootURL}jnlpJars/remoting.jar"/>
-      </resources>
-
-      <application-desc main-class="hudson.remoting.jnlp.Main">
+      <application-desc>
         <argument>${it.jnlpMac}</argument>
         <argument>${it.node.nodeName}</argument>
         <j:if test="${launcher.webSocket}">

pom.xml

@@ -90,7 +90,7 @@ THE SOFTWARE.
     <changelog.url>https://www.jenkins.io/changelog</changelog.url>
 
     <!-- Bundled Remoting version -->
-    <remoting.version>4.13</remoting.version>
+    <remoting.version>4.14</remoting.version>
     <!-- Minimum Remoting version, which is tested for API compatibility -->
     <remoting.minimum.supported.version>3.14</remoting.minimum.supported.version>
 

test/pom.xml

@@ -178,13 +178,6 @@ THE SOFTWARE.
       <version>318.va_f3ccb_729b_71</version>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <!-- for testing JNLP launch. -->
-      <groupId>org.jvnet.hudson</groupId>
-      <artifactId>netx</artifactId>
-      <version>0.5-hudson-2</version>
-      <scope>test</scope>
-    </dependency>
     <dependency>
       <groupId>org.mockito</groupId>
       <artifactId>mockito-inline</artifactId>