server: Allow template names upto 255 chars (#6768)

* Allow template names upto 255 chars

* Update error message

* externalise name length in constant

Fixes: #6766

Author: DaanHoogland

api/src/main/java/com/cloud/template/VirtualMachineTemplate.java

@@ -30,6 +30,8 @@
 import com.cloud.utils.fsm.StateObject;
 
 public interface VirtualMachineTemplate extends ControlledEntity, Identity, InternalIdentity, StateObject<VirtualMachineTemplate.State> {
+    int MAXIMUM_TEMPLATE_NAME_LENGTH = 255;
+
     enum State {
         Active,
         Inactive,

server/src/main/java/com/cloud/template/TemplateManagerImpl.java

@@ -1747,8 +1747,9 @@ public VMTemplateVO createPrivateTemplateRecord(CreateTemplateCmd cmd, Account t
         _accountMgr.checkAccess(caller, null, true, templateOwner);
 
         String name = cmd.getTemplateName();
-        if ((name == null) || (name.length() > 32)) {
-            throw new InvalidParameterValueException("Template name cannot be null and should be less than 32 characters");
+        if ((org.apache.commons.lang3.StringUtils.isBlank(name)
+                || (name.length() > VirtualMachineTemplate.MAXIMUM_TEMPLATE_NAME_LENGTH))) {
+            throw new InvalidParameterValueException(String.format("Template name cannot be null and cannot be more %s characters", VirtualMachineTemplate.MAXIMUM_TEMPLATE_NAME_LENGTH));
         }
 
         if (cmd.getTemplateTag() != null) {