wait_for_updates.rb

require "rbvmomi"

vim = RbVmomi::VIM.connect(
  host: "127.0.0.1",
  port: "8989",
  insecure: true,
  username: "root",
  password: "vmware"
)

spec = {
  objectSet: [
    {
      obj: vim.serviceContent.rootFolder,
      selectSet: [
        RbVmomi::VIM::TraversalSpec(name: "tsFolder", path: "childEntity", selectSet: [{name: "tsFolder"}, {name: "tsDcToVmFolder"}]),
        RbVmomi::VIM::TraversalSpec(name: "tsDcToVmFolder", path: "vmFolder", selectSet: [{name: "tsFolder"}])
      ]
    }
  ],
  propSet: [{type: :VirtualMachine, all: false, pathSet: ["name"]}]
}

property_filter = vim.propertyCollector.CreateFilter(spec: spec, partialUpdates: true)

truncated = true
version = nil

while truncated
  update_set = vim.propertyCollector.WaitForUpdatesEx(version: version, options: {maxObjectUpdates: 100})
  break if update_set.nil?

  version = update_set.version
  truncated = !!update_set.truncated

  filter_update = update_set.filterSet.first
  puts "Received #{filter_update.objectSet.count} updates"
end

property_filter.DestroyPropertyFilter