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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/ThresholdCircuitBreaker.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.atomic.AtomicLong; /** * <p> * A simple implementation of the <a * href="http://martinfowler.com/bliki/CircuitBreaker.html">Circuit Breaker</a> pattern * that opens if the requested increment amount is greater than a given threshold. * </p> * * <p> * It contains an internal counter that starts in zero, and each call increments the counter by a given amount. * If the threshold is zero, the circuit breaker will be in a permanent <em>open</em> state. * </p> * * <p> * An example of use case could be a memory circuit breaker. * </p> * * <pre> * long threshold = 10L; * ThresholdCircuitBreaker breaker = new ThresholdCircuitBreaker(10L); * ... * public void handleRequest(Request request) { * long memoryUsed = estimateMemoryUsage(request); * if (breaker.incrementAndCheckState(memoryUsed)) { * // actually handle this request * } else { * // do something else, e.g. send an error code * } * } * </pre> * * <p>#Thread safe#</p> * @since 3.5 */ public class ThresholdCircuitBreaker extends AbstractCircuitBreaker<Long> { /** * The initial value of the internal counter. */ private static final long INITIAL_COUNT = 0L; /** * The threshold. */ private final long threshold; /** * Controls the amount used. */ private final AtomicLong used; /** * <p>Creates a new instance of {@code ThresholdCircuitBreaker} and initializes the threshold.</p> * * @param threshold the threshold. */ public ThresholdCircuitBreaker(final long threshold) { this.used = new AtomicLong(INITIAL_COUNT); this.threshold = threshold; } /** * Gets the threshold. * * @return the threshold */ public long getThreshold() { return threshold; } /** * {@inheritDoc} */ @Override public boolean checkState() { return isOpen(); } /** * {@inheritDoc} * * <p>Resets the internal counter back to its initial value (zero).</p> */ @Override public void close() { super.close(); this.used.set(INITIAL_COUNT); } /** * {@inheritDoc} * * <p>If the threshold is zero, the circuit breaker will be in a permanent <em>open</em> state.</p> */ @Override public boolean incrementAndCheckState(final Long increment) { if (threshold == 0) { open(); } final long used = this.used.addAndGet(increment); if (used > threshold) { open(); } return checkState(); } }
⏎ org/apache/commons/lang3/concurrent/ThresholdCircuitBreaker.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, 149617👍, 3💬
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