001/******************************************************************************* 002 * Copyright (c) 2006-2014 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the Eclipse Public License v1.0 006 * which accompanies this distribution, and is available at 007 * http://www.eclipse.org/legal/epl-v10.html 008 ******************************************************************************/ 009package org.nuxeo.ecm.core.redis; 010 011import org.nuxeo.runtime.model.SimpleContributionRegistry; 012 013public class SingletonContributionRegistry<T> extends SimpleContributionRegistry<T> { 014 015 protected T main; 016 017 @Override 018 public String getContributionId(T contrib) { 019 return "main"; 020 } 021 022 @Override 023 public void contributionUpdated(String id, T contrib, T newOrigContrib) { 024 main = contrib; 025 } 026 027 @Override 028 public void contributionRemoved(String id, T origContrib) { 029 main = null; 030 } 031}