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Java example source code file (CallableBackgroundInitializer.java)
The CallableBackgroundInitializer.java Java example source code/* * 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, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.apache.commons.lang3.concurrent; import java.util.concurrent.Callable; import java.util.concurrent.ExecutorService; /** * <p> * A specialized {@link BackgroundInitializer} implementation that wraps a * {@code Callable} object. * </p> * <p> * An instance of this class is initialized with a {@code Callable} object when * it is constructed. The implementation of the {@link #initialize()} method * defined in the super class delegates to this {@code Callable} so that the * {@code Callable} is executed in the background thread. * </p> * <p> * The {@code java.util.concurrent.Callable} interface is a standard mechanism * of the JDK to define tasks to be executed by another thread. The {@code * CallableBackgroundInitializer} class allows combining this standard interface * with the background initializer API. * </p> * <p> * Usage of this class is very similar to the default usage pattern of the * {@link BackgroundInitializer} class: Just create an instance and provide the * {@code Callable} object to be executed, then call the initializer's * {@link #start()} method. This causes the {@code Callable} to be executed in * another thread. When the results of the {@code Callable} are needed the * initializer's {@link #get()} method can be called (which may block until * background execution is complete). The following code fragment shows a * typical usage example: * </p> * * <pre> * // a Callable that performs a complex computation * Callable<Integer> computationCallable = new MyComputationCallable(); * // setup the background initializer * CallableBackgroundInitializer<Integer> initializer = * new CallableBackgroundInitializer(computationCallable); * initializer.start(); * // Now do some other things. Initialization runs in a parallel thread * ... * // Wait for the end of initialization and access the result * Integer result = initializer.get(); * </pre> * * * @since 3.0 * @param <T> the type of the object managed by this initializer class */ public class CallableBackgroundInitializer<T> extends BackgroundInitializer Other Java examples (source code examples)Here is a short list of links related to this Java CallableBackgroundInitializer.java source code file: |
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