Merge pull request #40 from mrdfuse/JENKINS-34593

JENKINS-34593 add an option to delete existing clients

client/src/main/java/hudson/plugins/swarm/Options.java

@@ -8,9 +8,6 @@
 import java.util.List;
 import java.util.Map;
 
-/**
- *
- */
 public class Options {
 
     @Option(name = "-name", usage = "Name of the slave")
@@ -51,6 +48,9 @@
     @Option(name = "-disableClientsUniqueId", usage = "Disables Clients unique ID.")
     public boolean disableClientsUniqueId;
 
+    @Option(name = "-deleteExistingClients", usage = "Deletes any existing slave with the same name.")
+    public boolean deleteExistingClients;
+
     @Option(
             name = "-mode",
             usage = "The mode controlling how Jenkins allocates jobs to slaves. Can be either '" + ModeOptionHandler.NORMAL + "' " +

client/src/main/java/hudson/plugins/swarm/SwarmClient.java

@@ -323,6 +323,7 @@ protected void createSwarmSlave(Candidate target) throws IOException, Interrupte
                 + "&secret=" + target.secret
                 + param("mode", options.mode.toUpperCase(Locale.ENGLISH))
                 + param("hash", hash)
+                + param("deleteExistingClients", Boolean.toString(options.deleteExistingClients))
         );
 
         post.setDoAuthentication(true);

plugin/src/main/java/hudson/plugins/swarm/PluginImpl.java

@@ -39,7 +39,7 @@
      */
     public void doCreateSlave(StaplerRequest req, StaplerResponse rsp, @QueryParameter String name, @QueryParameter String description, @QueryParameter int executors,
             @QueryParameter String remoteFsRoot, @QueryParameter String labels, @QueryParameter String secret, @QueryParameter Node.Mode mode, 
-            @QueryParameter(fixEmpty = true) String hash) throws IOException {
+            @QueryParameter(fixEmpty = true) String hash, @QueryParameter boolean deleteExistingClients) throws IOException {
 
         if (!getSwarmSecret().equals(secret)) {
             rsp.setStatus(SC_FORBIDDEN);
@@ -58,7 +58,7 @@ public void doCreateSlave(StaplerRequest req, StaplerResponse rsp, @QueryParamet
                 nodeProperties = Lists.newArrayList(new ToolLocationNodeProperty(parsedToolLocations));
             }
 
-            if (hash == null && jenkins.getNode(name) != null) {
+            if (hash == null && jenkins.getNode(name) != null && !deleteExistingClients) {
                 // this is a legacy client, they won't be able to pick up the new name, so throw them away
                 // perhaps they can find another master to connect to
                 rsp.setStatus(SC_CONFLICT);
@@ -75,7 +75,7 @@ public void doCreateSlave(StaplerRequest req, StaplerResponse rsp, @QueryParamet
             // check for existing connections
             {
                 Node n = jenkins.getNode(name);
-                if (n != null) {
+                if (n != null && !deleteExistingClients) {
                     Computer c = n.toComputer();
                     if (c != null && c.isOnline()) {
                         // this is an existing connection, we'll only cause issues if we trample over an online connection