Adding a TransientComputerActionFactory. Note that the transient actions are...

Adding a TransientComputerActionFactory. Note that the transient actions are never updated, so to make actions appear to be added dynammically you need to always add them and control their display, rather than conditionally add them.  This is the same behaviour as for TransientViewActionFactory but not quite the same behaviour as TransientProjectActionFactory

changelog.html

@@ -84,6 +84,8 @@ Upcoming changes</a>
   <li class=rfe>
     Expand environment variables in fingerprint targets
     (<a href="http://issues.jenkins-ci.org/browse/JENKINS-9138">issue 9138</a>)
+  <li class=rfe>
+    Added an extension point to allow adding transient actions to computers.
 </ul>
 </div><!--=TRUNK-END=-->
 

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

@@ -139,11 +139,28 @@ public /*transient*/ abstract class Computer extends Actionable implements Acces
 
     private final WorkspaceList workspaceList = new WorkspaceList();
 
+    protected transient List<Action> transientActions;
+
     public Computer(Node node) {
         assert node.getNumExecutors()!=0 : "Computer created with 0 executors";
         setNode(node);
     }
 
+    /**
+     * Returns the transient {@link Action}s associated with the computer.
+     */
+    public List<Action> getActions() {
+    	List<Action> result = new ArrayList<Action>();
+    	result.addAll(super.getActions());
+    	synchronized (this) {
+    		if (transientActions == null) {
+    			transientActions = TransientComputerActionFactory.createAllFor(this);
+    		}
+    		result.addAll(transientActions);
+    	}
+    	return result;
+    }
+
     /**
      * This is where the log from the remote agent goes.
      */

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

+/*
+ * The MIT License
+ *
+ * Copyright (c) 2004-2011, Sun Microsystems, Inc., Stephen Connolly.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package hudson.model;
+
+import hudson.ExtensionList;
+import hudson.ExtensionPoint;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+/**
+ * Extension point for inserting transient {@link hudson.model.Action}s to {@link hudson.model.Computer}s.
+ * <p>
+ * To register your implementation, put {@link hudson.Extension} on your subtype.
+ *
+ * @author Stephen Connolly
+ * @since 1.405
+ * @see hudson.model.Action
+ */
+public abstract class TransientComputerActionFactory implements ExtensionPoint {
+    /**
+     * Creates actions for the given computer.
+     *
+     * @param target
+     *      The computer for which the action objects are requested. Never null.
+     * @return
+     *      Can be empty but must not be null.
+     */
+    public abstract Collection<? extends Action> createFor(Computer target);
+
+    /**
+     * Returns all the registered {@link TransientComputerActionFactory}s.
+     */
+    public static ExtensionList<TransientComputerActionFactory> all() {
+        return Hudson.getInstance().getExtensionList(TransientComputerActionFactory.class);
+    }
+
+
+    /**
+     * Creates {@link Action)s for a node, using all registered {@link TransientComputerActionFactory }s.
+     */
+	public static List<Action> createAllFor(Computer target) {
+		List<Action> result = new ArrayList<Action>();
+		for (TransientComputerActionFactory f: all()) {
+			result.addAll(f.createFor(target));
+		}
+		return result;
+	}
+
+
+}

core/src/main/resources/hudson/model/Computer/sidepanel.jelly

@@ -37,6 +37,7 @@ THE SOFTWARE.
       <l:task icon="images/24x24/monitor.gif" href="load-statistics" title="${%Load Statistics}" />
       <l:task icon="images/24x24/terminal.gif" href="script" title="${%Script Console}" permission="${app.ADMINISTER}" />
       <st:include page="sidepanel2.jelly" optional="true" /><!-- hook for derived class to add more items -->
+      <t:actions />
     </l:tasks>
     <t:executors computers="${h.singletonList(it)}" />
   </l:side-panel>