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Statistical sampling library for use in virtdata libraries, based on apache commons math 4

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
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package org.apache.commons.lang3.concurrent;

/**
 * 

* Definition of an interface for the thread-safe initialization of objects. *

*

* The idea behind this interface is to provide access to an object in a * thread-safe manner. A {@code ConcurrentInitializer} can be passed to multiple * threads which can all access the object produced by the initializer. Through * the {@link #get()} method the object can be queried. *

*

* Concrete implementations of this interface will use different strategies for * the creation of the managed object, e.g. lazy initialization or * initialization in a background thread. This is completely transparent to * client code, so it is possible to change the initialization strategy without * affecting clients. *

* * @since 3.0 * @param the type of the object managed by this initializer class */ public interface ConcurrentInitializer { /** * Returns the fully initialized object produced by this {@code * ConcurrentInitializer}. A concrete implementation here returns the * results of the initialization process. This method may block until * results are available. Typically, once created the result object is * always the same. * * @return the object created by this {@code ConcurrentException} * @throws ConcurrentException if an error occurred during initialization of * the object */ T get() throws ConcurrentException; }




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