1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.db.common.procedure.adapter;
14 import java.util.concurrent.atomic.AtomicBoolean;
16 import org.simantics.db.AsyncReadGraph;
17 import org.simantics.db.procedure.AsyncListener;
19 abstract public class StagedAsyncListener<T> implements AsyncListener<T> {
21 final private AtomicBoolean first = new AtomicBoolean(true);
24 public void exception(AsyncReadGraph graph, Throwable t) {
28 final public void execute(AsyncReadGraph graph, T result) {
29 if(first.compareAndSet(true, false)) {
37 public boolean isDisposed() {
41 abstract public void first(AsyncReadGraph graph, T result);
42 abstract public void rest(AsyncReadGraph graph, T result);