Add support for Folder configuration

pom.xml

@@ -72,6 +72,12 @@
             <version>1.28</version>
             <type>jar</type>
         </dependency>
+        <dependency>
+            <groupId>org.jenkins-ci.plugins</groupId>
+            <artifactId>cloudbees-folder</artifactId>
+            <version>5.2.2</version>
+        </dependency>
+
         <dependency>
             <groupId>com.toastcoders</groupId>
             <artifactId>yavijava</artifactId>

src/main/java/org/jenkinsci/plugins/folder/FolderVSphereCloudProperty.java

@@ -0,0 +1,112 @@
+package org.jenkinsci.plugins.folder;
+
+import com.cloudbees.hudson.plugins.folder.AbstractFolder;
+import com.cloudbees.hudson.plugins.folder.AbstractFolderProperty;
+import com.cloudbees.hudson.plugins.folder.AbstractFolderPropertyDescriptor;
+import hudson.Extension;
+import hudson.util.FormValidation;
+import org.apache.commons.lang.StringUtils;
+import org.jenkinsci.plugins.vSphereCloud;
+import org.jenkinsci.plugins.vsphere.VSphereConnectionConfig;
+import org.jenkinsci.plugins.vsphere.tools.VSphere;
+import org.kohsuke.stapler.DataBoundConstructor;
+import org.kohsuke.stapler.QueryParameter;
+
+import java.util.List;
+
+/**
+ * Created by igreenfi on 11/30/2016.
+ */
+public class FolderVSphereCloudProperty extends AbstractFolderProperty<AbstractFolder<?>> {
+
+    public List<vSphereCloud> getVsphereClouds() {
+        return clouds;
+    }
+
+    private List<vSphereCloud> clouds = null;
+
+    public List<vSphereCloud> getClouds() {
+        return clouds;
+    }
+
+    public void setClouds(List<vSphereCloud> clouds) {
+        this.clouds = clouds;
+    }
+
+    @DataBoundConstructor
+    public FolderVSphereCloudProperty(List<vSphereCloud> clouds) {
+        this.clouds = clouds;
+    }
+
+    @Override
+    public String toString() {
+        final StringBuffer sb = new StringBuffer("FolderVSphereCloudProperty{");
+        sb.append("clouds=").append(clouds);
+        sb.append('}');
+        return sb.toString();
+    }
+
+    @Extension()
+    public static class DescriptorImpl extends AbstractFolderPropertyDescriptor {
+
+        @Override
+        public String getDisplayName() {
+            return "vSphere Cloud";
+        }
+
+        /**
+         * For UI.
+         *
+         * @param vsHost        From UI.
+         * @param vsDescription From UI.
+         * @param credentialsId From UI.
+         * @return Result of the validation.
+         */
+        public FormValidation doTestConnection(@QueryParameter String vsHost,
+                                               @QueryParameter String vsDescription,
+                                               @QueryParameter String credentialsId) {
+            try {
+                /* We know that these objects are not null */
+                if (vsHost.length() == 0) {
+                    return FormValidation.error("vSphere Host is not specified");
+                } else {
+                    /* Perform other sanity checks. */
+                    if (!vsHost.startsWith("https://")) {
+                        return FormValidation.error("vSphere host must start with https://");
+                    } else if (vsHost.endsWith("/")) {
+                        return FormValidation.error("vSphere host name must NOT end with a trailing slash");
+                    }
+                }
+
+                final VSphereConnectionConfig config = new VSphereConnectionConfig(vsHost, credentialsId);
+                final String effectiveUsername = config.getUsername();
+                final String effectivePassword = config.getPassword();
+
+                if (StringUtils.isEmpty(effectiveUsername)) {
+                    return FormValidation.error("Username is not specified");
+                }
+
+                if (StringUtils.isEmpty(effectivePassword)) {
+                    return FormValidation.error("Password is not specified");
+                }
+
+                VSphere.connect(vsHost + "/sdk", effectiveUsername, effectivePassword).disconnect();
+
+                return FormValidation.ok("Connected successfully");
+            } catch (RuntimeException e) {
+                throw e;
+            } catch (Exception e) {
+                throw new RuntimeException(e);
+            }
+        }
+
+        public FormValidation doCheckMaxOnlineSlaves(@QueryParameter String maxOnlineSlaves) {
+            return FormValidation.validateNonNegativeInteger(maxOnlineSlaves);
+        }
+
+        public FormValidation doCheckInstanceCap(@QueryParameter String instanceCap) {
+            return FormValidation.validateNonNegativeInteger(instanceCap);
+        }
+
+    }
+}