Adding @Symbol

Where applicable symbol names used by Job DSL plugin is used for maximum compatibility: https://jenkinsci.github.io/job-dsl-plugin/

core/src/main/java/hudson/AboutJenkins.java

@@ -2,6 +2,8 @@ package hudson;
 
 import hudson.model.ManagementLink;
 import java.net.URL;
+
+import org.jenkinsci.Symbol;
 import org.kohsuke.accmod.Restricted;
 import org.kohsuke.accmod.restrictions.NoExternalUse;
 
@@ -10,7 +12,7 @@ import org.kohsuke.accmod.restrictions.NoExternalUse;
  * 
  * @author Kohsuke Kawaguchi
  */
-@Extension
+@Extension @Symbol("about")
 public class AboutJenkins extends ManagementLink {
     @Override
     public String getIconFileName() {

core/src/main/java/hudson/cli/CLIAction.java

@@ -34,6 +34,7 @@ import javax.servlet.http.HttpServletResponse;
 import hudson.model.UnprotectedRootAction;
 import jenkins.model.Jenkins;
 
+import org.jenkinsci.Symbol;
 import org.kohsuke.accmod.Restricted;
 import org.kohsuke.accmod.restrictions.NoExternalUse;
 import org.kohsuke.stapler.HttpResponses.HttpResponseException;
@@ -51,7 +52,7 @@ import hudson.remoting.Channel;
  *
  * @author ogondza
  */
-@Extension
+@Extension @Symbol("cli")
 @Restricted(NoExternalUse.class)
 public class CLIAction implements UnprotectedRootAction, StaplerProxy {
 

core/src/main/java/hudson/cli/CliProtocol.java

@@ -8,6 +8,7 @@ import hudson.remoting.ChannelBuilder;
 import jenkins.AgentProtocol;
 import jenkins.model.Jenkins;
 import jenkins.slaves.NioChannelSelector;
+import org.jenkinsci.Symbol;
 import org.jenkinsci.remoting.nio.NioChannelHub;
 
 import javax.inject.Inject;
@@ -25,7 +26,7 @@ import java.net.Socket;
  * @author Kohsuke Kawaguchi
  * @since 1.467
  */
-@Extension
+@Extension @Symbol("cli")
 public class CliProtocol extends AgentProtocol {
     @Inject
     NioChannelSelector nio;

core/src/main/java/hudson/cli/CliProtocol2.java

@@ -2,6 +2,7 @@ package hudson.cli;
 
 import hudson.Extension;
 import jenkins.model.Jenkins;
+import org.jenkinsci.Symbol;
 import org.jenkinsci.remoting.nio.NioChannelHub;
 
 import javax.crypto.SecretKey;
@@ -20,7 +21,7 @@ import java.security.Signature;
  * @author Kohsuke Kawaguchi
  * @since 1.467
  */
-@Extension
+@Extension @Symbol("cli2")
 public class CliProtocol2 extends CliProtocol {
     @Override
     public String getName() {

core/src/main/java/hudson/model/BooleanParameterDefinition.java

@@ -23,6 +23,7 @@
  */
 package hudson.model;
 
+import org.jenkinsci.Symbol;
 import org.kohsuke.stapler.StaplerRequest;
 import org.kohsuke.stapler.DataBoundConstructor;
 import net.sf.json.JSONObject;
@@ -72,7 +73,7 @@ public class BooleanParameterDefinition extends SimpleParameterDefinition {
         return new BooleanParameterValue(getName(), defaultValue, getDescription());
     }
 
-    @Extension
+    @Extension @Symbol("booleanParam")
     public static class DescriptorImpl extends ParameterDescriptor {
         @Override
         public String getDisplayName() {

core/src/main/java/hudson/model/ChoiceParameterDefinition.java

 package hudson.model;
 
 import hudson.util.FormValidation;
+import org.jenkinsci.Symbol;
 import org.kohsuke.stapler.QueryParameter;
 import org.kohsuke.stapler.StaplerRequest;
 import org.kohsuke.stapler.DataBoundConstructor;
@@ -91,7 +92,7 @@ public class ChoiceParameterDefinition extends SimpleParameterDefinition {
         return checkValue(new StringParameterValue(getName(), value, getDescription()));
     }
 
-    @Extension
+    @Extension @Symbol("choiceParam")
     public static class DescriptorImpl extends ParameterDescriptor {
         @Override
         public String getDisplayName() {

core/src/main/java/hudson/node_monitors/ArchitectureMonitor.java

@@ -28,6 +28,7 @@ import hudson.remoting.Callable;
 import hudson.Extension;
 import jenkins.security.MasterToSlaveCallable;
 import net.sf.json.JSONObject;
+import org.jenkinsci.Symbol;
 import org.kohsuke.stapler.StaplerRequest;
 
 import java.io.IOException;
@@ -38,7 +39,7 @@ import java.io.IOException;
  * @author Kohsuke Kawaguchi
  */
 public class ArchitectureMonitor extends NodeMonitor {
-    @Extension
+    @Extension @Symbol("architecture")
     public static final class DescriptorImpl extends AbstractAsyncNodeMonitorDescriptor<String> {
         @Override
         protected Callable<String, IOException> createCallable(Computer c) {

core/src/main/java/hudson/security/AuthorizationStrategy.java

@@ -39,6 +39,7 @@ import jenkins.model.Jenkins;
 import net.sf.json.JSONObject;
 
 import org.acegisecurity.Authentication;
+import org.jenkinsci.Symbol;
 import org.kohsuke.stapler.StaplerRequest;
 
 /**
@@ -231,7 +232,7 @@ public abstract class AuthorizationStrategy extends AbstractDescribableImpl<Auth
             }
         };
 
-        @Extension
+        @Extension @Symbol("unsecured")
         public static final class DescriptorImpl extends Descriptor<AuthorizationStrategy> {
             @Override
             public String getDisplayName() {

core/src/main/java/hudson/tasks/ArtifactArchiver.java

@@ -38,6 +38,7 @@ import hudson.util.FormValidation;
 import java.io.File;
 
 import org.apache.tools.ant.types.FileSet;
+import org.jenkinsci.Symbol;
 import org.kohsuke.stapler.StaplerRequest;
 import org.kohsuke.stapler.DataBoundConstructor;
 import org.kohsuke.stapler.AncestorInPath;
@@ -306,7 +307,7 @@ public class ArtifactArchiver extends Recorder implements SimpleBuildStep {
     @Deprecated
     public static volatile DescriptorImpl DESCRIPTOR;
 
-    @Extension
+    @Extension @Symbol("archiveArtifacts")
     public static class DescriptorImpl extends BuildStepDescriptor<Publisher> {
         public DescriptorImpl() {
             DESCRIPTOR = this; // backward compatibility

core/src/main/java/hudson/tasks/BatchFile.java

@@ -28,6 +28,7 @@ import hudson.Extension;
 import hudson.model.AbstractProject;
 import hudson.util.LineEndingConversion;
 import net.sf.json.JSONObject;
+import org.jenkinsci.Symbol;
 import org.kohsuke.stapler.DataBoundConstructor;
 import org.kohsuke.stapler.StaplerRequest;
 import java.io.ObjectStreamException;
@@ -59,7 +60,7 @@ public class BatchFile extends CommandInterpreter {
         return new BatchFile(command);
     }
 
-    @Extension
+    @Extension @Symbol("batchFile")
     public static final class DescriptorImpl extends BuildStepDescriptor<Builder> {
         @Override
         public String getHelpFile() {

core/src/main/java/hudson/tasks/BuildTrigger.java

@@ -68,6 +68,7 @@ import org.acegisecurity.Authentication;
 import org.acegisecurity.context.SecurityContext;
 import org.acegisecurity.context.SecurityContextHolder;
 import org.apache.commons.lang.StringUtils;
+import org.jenkinsci.Symbol;
 import org.kohsuke.stapler.AncestorInPath;
 import org.kohsuke.stapler.DataBoundConstructor;
 import org.kohsuke.stapler.QueryParameter;
@@ -331,7 +332,7 @@ public class BuildTrigger extends Recorder implements DependencyDeclarer {
         return this;
     }
 
-    @Extension
+    @Extension @Symbol("downstream")
     public static class DescriptorImpl extends BuildStepDescriptor<Publisher> {
         public String getDisplayName() {
             return Messages.BuildTrigger_DisplayName();

core/src/main/java/hudson/tools/BatchCommandInstaller.java

@@ -27,6 +27,7 @@ package hudson.tools;
 import hudson.Extension;
 import hudson.FilePath;
 import hudson.util.LineEndingConversion;
+import org.jenkinsci.Symbol;
 import org.kohsuke.stapler.DataBoundConstructor;
 import java.io.ObjectStreamException;
 
@@ -57,7 +58,7 @@ public class BatchCommandInstaller extends AbstractCommandInstaller {
         return new BatchCommandInstaller(getLabel(), getCommand(), getToolHome());
     }
  
-    @Extension
+    @Extension @Symbol("batchFile")
     public static class DescriptorImpl extends Descriptor<BatchCommandInstaller> {
 
         @Override

core/src/main/java/jenkins/management/CliLink.java

@@ -26,11 +26,12 @@ package jenkins.management;
 
 import hudson.Extension;
 import hudson.model.ManagementLink;
+import org.jenkinsci.Symbol;
 
 /**
  * @author <a href="mailto:nicolas.deloof@gmail.com">Nicolas De Loof</a>
  */
-@Extension(ordinal = Integer.MAX_VALUE - 800)
+@Extension(ordinal = Integer.MAX_VALUE - 800) @Symbol("cli")
 public class CliLink extends ManagementLink {
 
     @Override

core/src/main/java/jenkins/model/ArtifactManagerConfiguration.java

@@ -28,13 +28,14 @@ import hudson.Extension;
 import hudson.util.DescribableList;
 import java.io.IOException;
 import net.sf.json.JSONObject;
+import org.jenkinsci.Symbol;
 import org.kohsuke.stapler.StaplerRequest;
 
 /**
  * List of configured {@link ArtifactManagerFactory}s.
  * @since 1.532
  */
-@Extension
+@Extension @Symbol("artifactManager")
 public class ArtifactManagerConfiguration extends GlobalConfiguration {
     
     public static ArtifactManagerConfiguration get() {

core/src/main/java/jenkins/model/AssetManager.java

@@ -3,6 +3,7 @@ package jenkins.model;
 import hudson.Extension;
 import hudson.model.UnprotectedRootAction;
 import hudson.util.TimeUnit2;
+import org.jenkinsci.Symbol;
 import org.kohsuke.stapler.StaplerRequest;
 import org.kohsuke.stapler.StaplerResponse;
 
@@ -21,7 +22,7 @@ import java.util.Enumeration;
  *
  * @author Kohsuke Kawaguchi
  */
-@Extension
+@Extension @Symbol("assetManager")
 public class AssetManager implements UnprotectedRootAction {
 
     // not shown in the UI

core/src/main/java/jenkins/security/ApiTokenProperty.java

@@ -34,6 +34,7 @@ import hudson.util.HttpResponses;
 import hudson.util.Secret;
 import jenkins.model.Jenkins;
 import net.sf.json.JSONObject;
+import org.jenkinsci.Symbol;
 import org.kohsuke.stapler.AncestorInPath;
 import org.kohsuke.stapler.DataBoundConstructor;
 import org.kohsuke.stapler.HttpResponse;
@@ -161,7 +162,7 @@ public class ApiTokenProperty extends UserProperty {
         return this;
     }
 
-    @Extension
+    @Extension @Symbol("apiToken")
     public static final class DescriptorImpl extends UserPropertyDescriptor {
         public String getDisplayName() {
             return Messages.ApiTokenProperty_DisplayName();

core/src/main/java/jenkins/security/s2m/AdminCallableMonitor.java

@@ -5,6 +5,7 @@ import hudson.FilePath;
 import hudson.model.AdministrativeMonitor;
 import hudson.remoting.Callable;
 import jenkins.model.Jenkins;
+import org.jenkinsci.Symbol;
 import org.kohsuke.stapler.HttpResponse;
 import org.kohsuke.stapler.HttpResponses;
 import org.kohsuke.stapler.QueryParameter;
@@ -19,7 +20,7 @@ import java.io.IOException;
  * @since 1.THU
  * @author Kohsuke Kawaguchi
  */
-@Extension
+@Extension @Symbol("slaveToMasterAccessControl")
 public class AdminCallableMonitor extends AdministrativeMonitor {
     @Inject
     Jenkins jenkins;

core/src/main/java/jenkins/security/s2m/AdminCallableWhitelist.java

@@ -2,6 +2,7 @@ package jenkins.security.s2m;
 
 import hudson.Extension;
 import hudson.remoting.Callable;
+import org.jenkinsci.Symbol;
 import org.jenkinsci.remoting.Role;
 import org.jenkinsci.remoting.RoleSensitive;
 
@@ -19,7 +20,7 @@ import java.util.Collection;
  *
  * @author Kohsuke Kawaguchi
  */
-@Extension(ordinal=-100)
+@Extension(ordinal=-100) @Symbol("admin")
 public class AdminCallableWhitelist extends CallableWhitelist {
     @Inject
     AdminWhitelistRule rule;

core/src/main/java/jenkins/slaves/systemInfo/ClassLoaderStatisticsSlaveInfo.java

 package jenkins.slaves.systemInfo;
 
 import hudson.Extension;
+import org.jenkinsci.Symbol;
 
 /**
  * @author Kohsuke Kawaguchi
  */
-@Extension(ordinal=0)
+@Extension(ordinal=0) @Symbol("classLoaderStatistics")
 public class ClassLoaderStatisticsSlaveInfo extends SlaveSystemInfo {
     @Override
     public String getDisplayName() {

core/src/main/java/jenkins/widgets/BuildQueueWidget.java

@@ -3,6 +3,7 @@ package jenkins.widgets;
 import hudson.Extension;
 import hudson.widgets.Widget;
 import jenkins.model.Jenkins;
+import org.jenkinsci.Symbol;
 
 /**
  * Show the default build queue.
@@ -12,7 +13,7 @@ import jenkins.model.Jenkins;
  * @author Kohsuke Kawaguchi
  * @since 1.514
  */
-@Extension(ordinal=200) // historically this was the top most widget
+@Extension(ordinal=200) @Symbol("buildQueue") // historically this was the top most widget
 public class BuildQueueWidget extends Widget {
 
 }