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Apache Commons Lang v3 Source Code Files
Apache Commons Lang 3 is the 3rd version of Apache Commons Lang, which provides a host of helper utilities for the java.lang API.
Apache Commons Lang 3 Source Code files are provided in both binary packge (commons-lang3-3.12.0-bin.zip) and source package (commons-lang3-3.12.0-src.zip). You can download them at Apache Commons Lang Website.
Apache Commons Lang 3 Source Code has no dependencies and is compatible with Java 8 and newer versions. You can compile it to generate your own version of Apache Commons Lang 3 JAR file.
You can also browse the source code below:
✍: FYIcenter
⏎ org/apache/commons/lang3/concurrent/CallableBackgroundInitializer.java
/* * 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; import org.apache.commons.lang3.Validate; /** * <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<T> { /** The Callable to be executed. */ private final Callable<T> callable; /** * Creates a new instance of {@code CallableBackgroundInitializer} and sets * the {@code Callable} to be executed in a background thread. * * @param call the {@code Callable} (must not be <b>null</b>) * @throws IllegalArgumentException if the {@code Callable} is <b>null</b> */ public CallableBackgroundInitializer(final Callable<T> call) { checkCallable(call); callable = call; } /** * Creates a new instance of {@code CallableBackgroundInitializer} and * initializes it with the {@code Callable} to be executed in a background * thread and the {@code ExecutorService} for managing the background * execution. * * @param call the {@code Callable} (must not be <b>null</b>) * @param exec an external {@code ExecutorService} to be used for task * execution * @throws IllegalArgumentException if the {@code Callable} is <b>null</b> */ public CallableBackgroundInitializer(final Callable<T> call, final ExecutorService exec) { super(exec); checkCallable(call); callable = call; } /** * Performs initialization in a background thread. This implementation * delegates to the {@code Callable} passed at construction time of this * object. * * @return the result of the initialization * @throws Exception if an error occurs */ @Override protected T initialize() throws Exception { return callable.call(); } /** * Tests the passed in {@code Callable} and throws an exception if it is * undefined. * * @param callable the object to check * @throws IllegalArgumentException if the {@code Callable} is <b>null</b> */ private void checkCallable(final Callable<T> callable) { Validate.notNull(callable, "callable"); } }
⏎ org/apache/commons/lang3/concurrent/CallableBackgroundInitializer.java
Or download all of them as a single archive file:
File name: commons-lang3-3.12.0-sources.jar File size: 651724 bytes Release date: 2020-01-22 Download
⇒ Download and Install commons-lang3-3.8.1-bin.zip
⇐ Download Apache Commons Lang v3 Source Package
2022-10-19, 149737👍, 3💬
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