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Groovy example source code file (

This example Groovy source code file ( is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

all, exception, exception, hascleanup, hascleanup, hashset, iterator, iterator, janitor, janitor, set, util

The Groovy source code

 * Copyright 2003-2007 the original author or authors.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package org.codehaus.groovy.control;

import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

 *  An agent that can be used to defer cleanup operations to 
 *  a later time.  Users much implement the HasCleanup interface.  
 *  @author <a href="">Chris Poirier
 *  @version $Id: 10493 2008-01-19 10:23:02Z russel $

public class Janitor implements HasCleanup
    private final Set pending = new HashSet();   // All objects pending cleanup
    public void register( HasCleanup object )
        pending.add( object );
    public void cleanup()
        Iterator iterator = pending.iterator();
        while( iterator.hasNext() )
            HasCleanup object = (HasCleanup);
            try { object.cleanup(); } catch( Exception e ) {
                // Ignore

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