find_vdc_by_name
  parameters:
    name (String): name of VDC
  returns: VDC object matching name
  throws:
    'ObjectNotFoundError' when VDC with the name does not exist
    'RestClient::BadRequest' for un-expected errors

vdc_exists?
  parameters:
    name (String): name of VDC
  returns: boolean
  throws:
    'RestClient::BadRequest' for un-expected errors

catalogs
  returns: array of catalog objects
  throws:
    'RestClient::BadRequest' for un-expected errors

list_catalogs
  returns: array of catalog names
  throws:
    'RestClient::BadRequest' for un-expected errors

find_catalog_by_name
  returns:
    catalog object matching name
  throws:
    'ObjectNotFoundError' when catalog with the name does not exist
    'RestClient::BadRequest' for un-expected errors

create_catalog
  returns: catalog object created
  throws:
    'RestClient::BadRequest' for un-expected errors

delete_catalog_by_name
  parameters:
    name (String): name of catalog
  returns: Client object
  throws:
    'ObjectNotFoundError' when catalog with the name does not exist
    'RestClient::BadRequest' for un-expected errors

right_records
  returns: array of RightRecord objects
  throws:
    'RestClient::BadRequest' for un-expected errors

storage_profiles
  returns: array of storage profile objects
  throws:
    'RestClient::BadRequest' for un-expected errors

list_storage_profiles
  returns: array of storage profile names
  throws:
    'RestClient::BadRequest' for un-expected errors

find_storage_profile_by_name
  parameters:
    name (String): name of storage profile
  returns:
    storage profile object matching name
  throws:
    'ObjectNotFoundError' when storage profile with the name does not exist
    'RestClient::BadRequest' for un-expected errors

storage_profile_exists?
  parameters:
    name (String): name of storage profile
  returns: boolean
  throws:
    'RestClient::BadRequest' for un-expected errors

vapps
  returns: array of vapp objects
  throws:
    'RestClient::BadRequest' for un-expected errors

list_vapps
  returns: array of vapp names
  throws:
    'RestClient::BadRequest' for un-expected errors

find_vapp_by_name
  parameters:
    name (String): name of vapp
  returns:
    vapp object matching name
  throws:
    'ObjectNotFoundError' when vapp with the name does not exist
    'RestClient::BadRequest' for un-expected errors

vapp_exists?
  parameters:
    name (String): name of vapp
  returns: boolean
  throws:
    'RestClient::BadRequest' for un-expected errors

edge_gateways
  returns: array of EdgeGateway objects
  throws:
    'RestClient::BadRequest' for un-expected errors

resources
  returns: Resources object
  throws:
    'RestClient::BadRequest' for un-expected errors

networks
  returns: array of network objects
  throws:
    'RestClient::BadRequest' for un-expected errors

list_networks
  returns: array of network names
  throws:
    'RestClient::BadRequest' for un-expected errors

find_network_by_name
  parameters:
    name (String): name of network
  returns:
    network object matching name
  throws:
    'ObjectNotFoundError' when network with the name does not exist
    'RestClient::BadRequest' for un-expected errors

network_exists?
  parameters:
    name (String): name of network
  returns: boolean
  throws:
    'RestClient::BadRequest' for un-expected errors

disks
  returns: array of disk objects
  throws:
    'RestClient::BadRequest' for un-expected errors

list_disks
  returns: array of disk names
  throws:
    'RestClient::BadRequest' for un-expected errors

find_disks_by_name
  parameters:
    name (String): name of disk
  returns:
    array of disk objects matching name
  throws:
    'ObjectNotFoundError' when disk with the name does not exist
    'RestClient::BadRequest' for un-expected errors

disk_exists?
  parameters:
    name (String): name of disk
  returns: boolean
  throws:
    'RestClient::BadRequest' for un-expected errors

create_disk
  parameters:
    name (String): name of disk
    size_mb (Integer): disk size in megabyte
    vm (VCloudSdk::VM, optional): VM that to add disk locality to
    bus_type (String, optional): bus type of disk, defaults to "scsi"
    bus_sub_type (String, optional): bus sub type of disk, defaults to "lsilogic"
  returns: Disk object created
  throws:
    'CloudError' when size_mb is less than or equal to 0
    'CloudError' when bus_type is invalid
    'CloudError' when bus_sub_type is invalid
    'RestClient::BadRequest' for un-expected errors

delete_disk_by_name
  parameters:
    name (String): name of disk
  returns: VDC object
  throws:
    'CloudError' when more than one disks matching the name exist
    'CloudError' when disk is attached to vm
    'RestClient::BadRequest' for un-expected errors

delete_all_disks_by_name
  parameters:
    name (String): name of disk
  returns: VDC object
  throws:
    'CloudError' when any disk deletion failure occurs
    'RestClient::BadRequest' for un-expected errors

 items
   returns: array of catalog item objects
   throws:
     'RestClient::BadRequest' for un-expected errors

 list_items
   returns: array of catalog item names
   throws:
     'RestClient::BadRequest' for un-expected errors
 
find_item
  parameters:
    name (String): name of item
    type (String, optional): type of item - "application/vnd.vmware.vcloud.vAppTemplate+xml" or "application/vnd.vmware.vcloud.media+xml"
  returns: catalog item matching name and type
  throws:
    'ObjectNotFoundError' when an item matching the name and type is not found
    'RestClient::BadRequest' for un-expected errors

item_exists?
  parameters:
    name (String): name of item
    type (String, optional): type of item - "application/vnd.vmware.vcloud.vAppTemplate+xml" or "application/vnd.vmware.vcloud.media+xml"

  returns: boolean
  throws:
    'RestClient::BadRequest' for un-expected errors
 
 delete_item_by_name_and_type
    parameters:
      name (String): name of item
      type (String, optional): type of item - "application/vnd.vmware.vcloud.vAppTemplate+xml" or "application/vnd.vmware.vcloud.media+xml"
    returns: Catalog object
    throws:
      'ObjectNotFoundError' when an item matching the name and type is not found
      'RestClient::BadRequest' for un-expected errors

 delete_all_items
    returns: Catalog object
    throws:
      'RestClient::BadRequest' for un-expected errors

upload_media
  parameters:
    vdc_name (String): name of vdc
    media_name (String): name of media
    file (String): path of media file
    storage_profile_name (String, optional): name of storage profile to upload vapp template to
    image_type (String, optional): type of image file
  returns: catalog item uploaded
  throws:
    'CloudError' when media file matching name already exists
    'ObjectNotFoundError' when storage profile with the name does not exist
    'RestClient::BadRequest' for un-expected errors

 find_media_by_name
    parameters:
      name (String): name of media
    returns: media catalog item matching name
    throws:
      'ObjectNotFoundError' when an item matching the name and type is not found
      'RestClient::BadRequest' for un-expected error

 upload_vapp_template
     parameters:
       vdc_name (String): name of vdc
       template_name (String): name of vapp template
       directory (String): path of vapp template directory
       storage_profile_name (String, optional): name of storage profile to upload vapp template to
    returns: vapp template catalog item uploaded
    throws:
      'CloudError' when vapp template matching name already exists
      'ApiTimeoutError' if uploading vapp files times out
      'CloudError' when uploading vapp template task is not successful
      'RestClient::BadRequest' for un-expected error

 find_vapp_template_by_name
    parameters:
      name (String): name of vapp template
    returns: vapp template catalog item matching name
    throws:
      'ObjectNotFoundError' when an item matching the name and type is not found
      'RestClient::BadRequest' for un-expected error

 instantiate_vapp_template
     parameters:
       template_name (String): name of vapp template
       vdc_name (String): name of vdc
       vapp_name (String): name of vapp
       description (String, optional): description of vapp template
     returns: vapp object instantiated
     throws:
       'ApiError' when instantiating vapp template task is not successful
       'RestClient::BadRequest' for un-expected error

 ip_ranges
    returns: IpRanges object
    throws:
      'RestClient::BadRequest' for un-expected errors
 
 allocated_ips
    returns: array of strings
    throws:
      'RestClient::BadRequest' for un-expected errors

 delete
    returns: nil
    throws:
      'CloudError' if VApp is powered on
      'RestClient::BadRequest' for un-expected errors
 
 power_on
    returns: VApp object
    throws:
      'CloudError' if power_on_link of VApp is missing
      'RestClient::BadRequest' for un-expected errors
 
 power_off
    returns: VApp object
    throws:
      'CloudError' if power_off_link of VApp is missing
      'VappSuspendedError' if VApp is suspended
      'RestClient::BadRequest' for un-expected errors

 recompose_from_vapp_template
    parameters:
      catalog_name (String): name of catalog
      template_name (String): name of vapp template
    returns: recomposed vapp
    throws:
      'CloudError' when vapp is powered on
      'ObjectNotFoundError' when catalog with the name does not exist
      'ObjectNotFoundError' when vapp template with the name does not exist
      'RestClient::BadRequest' for un-expected errors

 vms
   returns: array of vm objects
   throws:
     'RestClient::BadRequest' for un-expected errors

 list_vms
   returns: array of vm names
   throws:
     'RestClient::BadRequest' for un-expected errors

 find_vm_by_name
   returns: VM object
   throws:
     'ObjectNotFoundError' when VM with the name does not exist
     'RestClient::BadRequest' for un-expected errors

 vm_exists?
  parameters:
    name (String): name of vm
  returns: boolean
  throws:
    'RestClient::BadRequest' for un-expected errors

 remove_vm_by_name
  parameters:
    name (String): name of vm
   returns: parent VApp object
   throws:
     'ObjectNotFoundError' when VM with the name does not exist
     'CloudError' when VApp is in status of 'POWERED_ON' and can not be recomposed
     'RestClient::BadRequest' for un-expected errors

 list_networks
   returns: array of network names
   throws:
     'RestClient::BadRequest' for un-expected errors

 add_network_by_name
   parameters:
     network_name (String): name of network in vdc org to add to vapp
     vapp_net_name (String, optional): what to name the network of the vapp.
     Default to network_name
     fence_mode (String, optional): Fencing allows identical virtual machines in different
     vApps to be powered on without conflict by isolating the MAC and IP addresses of the
     virtual machines. Available options are "bridged", "isolated" and "natRouted". Default
     to "bridged".
   returns: VApp object
   throws:
    'CloudError' when invalid fence mode is specified
    'ObjectNotFoundError' when network with the name does not exist
    'RestClient::BadRequest' for un-expected errors

 delete_network_by_name
   parameters:
     name (String): name of network to delete
   returns: VApp object
   throws:
     'ObjectNotFoundError' when network with the name does not exist
     'RestClient::BadRequest' for un-expected errors

 vcpu:
   returns: number of virtual cpus of VM
   throws:
     'CloudError' when information of number of virtual cpus of VM is unavailable
     'RestClient::BadRequest' for un-expected errors

 vcpu=
   parameters:
     The virtual cpu count.
   returns: VM object
   throws:
     'CloudError' when the cpu count is less than or equal to 0
     'RestClient::BadRequest' for un-expected errors

 memory
   returns: integer number, the size of memory in megabyte
   throws:
     'ApiError' when AllocationUnits of memory is in unexpected form
     'CloudError' when size of memory is zero
     'RestClient::BadRequest' for un-expected errors

 memory=
    parameters:
      The size of memory in megabyte.
    returns: VM object
    throws:
      'CloudError' when the memory size is less than or equal to 0
      'RestClient::BadRequest' for un-expected errors

nics
  returns: array of NIC objects
  throws:
    'RestClient::BadRequest' for un-expected errors

 independent_disks
   returns: array of disk objects
   throws:
     'RestClient::BadRequest' for un-expected errors

 list_disks
   returns: names of disks on vm (in parentheses it shows the name of independent disk)
   throws:
     'RestClient::BadRequest' for un-expected errors

 attach_disk
   parameters:
     disk: The disk object.
   returns: VM object
   throws:
     'CloudError' if disk is already attached
     'RestClient::BadRequest' for un-expected errors

 detach_disk
   parameters:
     disk: The disk object.
   returns: VM object
   throws:
     'VmSuspendedError' if containing vApp is suspended
     'CloudError' if disk is not attached or attached to other VM
     'RestClient::BadRequest' for un-expected errors

 power_on
   returns: VM object
   throws:
     'CloudError' if power_on_link of VM is missing
     'RestClient::BadRequest' for un-expected errors

 power_off
   returns: VM object
   throws:
     'CloudError' if power_off_link of VM is missing
     'VmSuspendedError' if VM is suspended
     'RestClient::BadRequest' for un-expected errors

 insert_media
   parameters:
     catalog_name (String): name of catalog
     media_file_name (String): name of media file
   returns: VM object
   throws:
     'ObjectNotFoundError' if when catalog with the name does not exist
     'ObjectNotFoundError' if when media with the name does not exist
     'RestClient::BadRequest' for un-expected errors

 eject_media
   parameters:
     catalog_name (String): name of catalog
     media_file_name (String): name of media file
   returns: VM object
   throws:
     'ObjectNotFoundError' if when catalog with the name does not exist
     'ObjectNotFoundError' if when media with the name does not exist
     'RestClient::BadRequest' for un-expected errors

 add_nic
    parameters:
      network_name (String): name of network to add NIC
      ip_addressing_mode (String, optional): available options are "NONE", "MANUAL",
      "POOL" and "DHCP". Default to "POOL"
      ip (String, optional): IP address for "MANUAL" IP Mode
    return: VM object
    throws:
      'CloudError' if when ip_addressing_mode is invalid
      'CloudError' if ip is not specified in "MANUAL" ip_addressing_mode
      'CloudError' if vm is powered on
      'ObjectNotFoundError' if network is not added to VM's parent VApp
      'RestClient::BadRequest' for un-expected errors

delete_nics
   parameters:
     nics (splat NIC objects): NICs to delete
   return: VM object
   throws:
     'CloudError' if vm is powered on
     'ObjectNotFoundError' if specified nic index does not exist
     'RestClient::BadRequest' for un-expected errors

 product_section_properties
    returns:
      array of hash values representing properties of product section of VM
      empty array if VM does not have product section
    throws:
      'RestClient::BadRequest' for un-expected errors

 product_section_properties=
    parameters:
      properties (array of hash values): properties of product section of VM
    returns: VM object
    throws:
      'RestClient::BadRequest' for un-expected errors
    note:
      Rebooting VM is needed to reflect product section changes

 internal_disks
   returns: array of internal disk objects
   throws:
     'RestClient::BadRequest' for un-expected errors

 create_internal_disk
   parameters:
     capcity (Integer): disk size in megabyte
     bus_type (String, optional): bus type of disk, defaults to "scsi"
     bus_sub_type (String, optional): bus sub type of disk, defaults to "lsilogic"
   returns: VM object
   throws:
     'CloudError' when capcity is less than or equal to 0
     'CloudError' when bus_type is invalid
     'CloudError' when bus_sub_type is invalid
     'RestClient::BadRequest' for un-expected errors

 delete_internal_disk_by_name
   parameters:
     name (String): name of disk
   returns: VM object
   throws:
     'ObjectNotFoundError' if no disk matching the given name
     'RestClient::BadRequest' for un-expected errors

 available_storage
   returns:
     integer number of available storage in MB, i.e. storageLimitMB - storageUsedMB
     -1 if 'storageLimitMB' is 0

 public_ips:
   returns: IpRanges object
   throws:
     'RestClient::BadRequest' for un-expected errors

1. Create vCloud client object
    
   client = VCloudSdk::Client.new(url, username, password)

   Note that the parameter 'username' should be the VDC user_name@organization_name. For example,
   the VDC user name is admin, the organization name is myorg, then the 'username' parameter 
   here should be admin@myorg. 
    
2. Find the catalog where the vapp template is stored
   catalog = client.find_catalog_by_name(catalog_name)

3. Create vApp from that vapp template
   vapp = instantiate_vapp_template(vapp_template_name, vdc_name, vapp_name)