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