Dieser Inhalt ist in der von Ihnen ausgewählten Sprache nicht verfügbar.

3.18. Checking System Events


This Ruby example retrieves logged system events.

# In order to ensure that no events are lost, it is recommended to write
# the index of the last processed event, in persistent storage.
# Here, it is stored in a file called index.txt. In a production environment,
# it will likely be stored in a database.
INDEX_TXT = 'index.txt'.freeze

def write_index(index)
  File.open(INDEX_TXT, 'w') { |f| f.write(index.to_s) }
end

def read_index
  return File.read(INDEX_TXT).to_i if File.exist?(INDEX_TXT)
  nil
end

# This is the function that is called to process the events. It prints
# the identifier and description of each event.
def process_event(event)
  puts("#{event.id} - #{event.description}")
end

# Find the root of the tree of services:
system_service = connection.system_service

# Find the service that manages the collection of events:
events_service = system_service.events_service

# If no index is stored yet, retrieve the last event and start with it.
# Events are ordered by index, in ascending order. max=1 retrieves only one event,
# the last event.
unless read_index
  events = events_service.list(max: 1)
  unless events.empty?
    first = events.first
    process_event(first)
    write_index(first.id.to_i)
  end
end

# This loop retrieves the events, always starting from the last index. It waits
# before repeating. The from parameter specifies that you want to retrieve
# events that are newer than the last index that was processed. Note: the max
# parameter is not used, so that all pending events will be retrieved.
loop do
  sleep(5)
  events = events_service.list(from: read_index)
  events.each do |event|
    process_event(event)
    write_index(event.id.to_i)
  end
end

For more information, see http://www.rubydoc.info/gems/ovirt-engine-sdk/OvirtSDK4%2FEventsService:list.

Red Hat logoGithubRedditYoutubeTwitter

Lernen

Testen, kaufen und verkaufen

Communitys

Über Red Hat Dokumentation

Wir helfen Red Hat Benutzern, mit unseren Produkten und Diensten innovativ zu sein und ihre Ziele zu erreichen – mit Inhalten, denen sie vertrauen können.

Mehr Inklusion in Open Source

Red Hat hat sich verpflichtet, problematische Sprache in unserem Code, unserer Dokumentation und unseren Web-Eigenschaften zu ersetzen. Weitere Einzelheiten finden Sie in Red Hat Blog.

Über Red Hat

Wir liefern gehärtete Lösungen, die es Unternehmen leichter machen, plattform- und umgebungsübergreifend zu arbeiten, vom zentralen Rechenzentrum bis zum Netzwerkrand.

© 2024 Red Hat, Inc.