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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/AbstractCircuitBreaker.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.beans.PropertyChangeListener; import java.beans.PropertyChangeSupport; import java.util.concurrent.atomic.AtomicReference; /** * Base class for circuit breakers. * * @param <T> the type of the value monitored by this circuit breaker * @since 3.5 */ public abstract class AbstractCircuitBreaker<T> implements CircuitBreaker<T> { /** * The name of the <em>open</em> property as it is passed to registered * change listeners. */ public static final String PROPERTY_NAME = "open"; /** The current state of this circuit breaker. */ protected final AtomicReference<State> state = new AtomicReference<>(State.CLOSED); /** An object for managing change listeners registered at this instance. */ private final PropertyChangeSupport changeSupport; /** * Creates an {@code AbstractCircuitBreaker}. It also creates an internal {@code PropertyChangeSupport}. */ public AbstractCircuitBreaker() { changeSupport = new PropertyChangeSupport(this); } /** * {@inheritDoc} */ @Override public boolean isOpen() { return isOpen(state.get()); } /** * {@inheritDoc} */ @Override public boolean isClosed() { return !isOpen(); } /** * {@inheritDoc} */ @Override public abstract boolean checkState(); /** * {@inheritDoc} */ @Override public abstract boolean incrementAndCheckState(T increment); /** * {@inheritDoc} */ @Override public void close() { changeState(State.CLOSED); } /** * {@inheritDoc} */ @Override public void open() { changeState(State.OPEN); } /** * Converts the given state value to a boolean <em>open</em> property. * * @param state the state to be converted * @return the boolean open flag */ protected static boolean isOpen(final State state) { return state == State.OPEN; } /** * Changes the internal state of this circuit breaker. If there is actually a change * of the state value, all registered change listeners are notified. * * @param newState the new state to be set */ protected void changeState(final State newState) { if (state.compareAndSet(newState.oppositeState(), newState)) { changeSupport.firePropertyChange(PROPERTY_NAME, !isOpen(newState), isOpen(newState)); } } /** * Adds a change listener to this circuit breaker. This listener is notified whenever * the state of this circuit breaker changes. If the listener is * <strong>null</strong>, it is silently ignored. * * @param listener the listener to be added */ public void addChangeListener(final PropertyChangeListener listener) { changeSupport.addPropertyChangeListener(listener); } /** * Removes the specified change listener from this circuit breaker. * * @param listener the listener to be removed */ public void removeChangeListener(final PropertyChangeListener listener) { changeSupport.removePropertyChangeListener(listener); } /** * An internal enumeration representing the different states of a circuit * breaker. This class also contains some logic for performing state * transitions. This is done to avoid complex if-conditions in the code of * {@code CircuitBreaker}. */ protected enum State { /** The closed state. */ CLOSED { /** * {@inheritDoc} */ @Override public State oppositeState() { return OPEN; } }, /** The open state. */ OPEN { /** * {@inheritDoc} */ @Override public State oppositeState() { return CLOSED; } }; /** * Returns the opposite state to the represented state. This is useful * for flipping the current state. * * @return the opposite state */ public abstract State oppositeState(); } }
⏎ org/apache/commons/lang3/concurrent/AbstractCircuitBreaker.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, 150959👍, 3💬
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