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Apache ZooKeeper 3.7.0 Server Source Code
Apache ZooKeeper is an open-source server which enables highly
reliable distributed coordination.
Apache ZooKeeper Server Source Code files are provided in the source packge (apache-zookeeper-3.7.0.tar.gz). You can download it at Apache ZooKeeper Website.
You can also browse Apache ZooKeeper Server Source Code below:
✍: FYIcenter.com
⏎ org/apache/zookeeper/server/quorum/MultipleAddresses.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.zookeeper.server.quorum; import static java.util.Arrays.asList; import java.io.IOException; import java.net.InetAddress; import java.net.InetSocketAddress; import java.net.NoRouteToHostException; import java.net.UnknownHostException; import java.time.Duration; import java.util.Collection; import java.util.Collections; import java.util.List; import java.util.NoSuchElementException; import java.util.Objects; import java.util.Set; import java.util.concurrent.ConcurrentHashMap; import java.util.stream.Collectors; /** * This class allows to store several quorum and electing addresses. * * See ZOOKEEPER-3188 for a discussion of this feature. */ public final class MultipleAddresses { public static final Duration DEFAULT_TIMEOUT = Duration.ofMillis(1000); private static Set<InetSocketAddress> newConcurrentHashSet() { return Collections.newSetFromMap(new ConcurrentHashMap<>()); } private Set<InetSocketAddress> addresses; private final Duration timeout; public MultipleAddresses() { this(Collections.emptyList()); } public MultipleAddresses(Collection<InetSocketAddress> addresses) { this(addresses, DEFAULT_TIMEOUT); } public MultipleAddresses(InetSocketAddress address) { this(asList(address), DEFAULT_TIMEOUT); } public MultipleAddresses(Collection<InetSocketAddress> addresses, Duration timeout) { this.addresses = newConcurrentHashSet(); this.addresses.addAll(addresses); this.timeout = timeout; } public boolean isEmpty() { return addresses.isEmpty(); } /** * Returns all addresses in an unmodifiable set. * * @return set of all InetSocketAddress */ public Set<InetSocketAddress> getAllAddresses() { return Collections.unmodifiableSet(addresses); } /** * Returns wildcard addresses for all ports * * @return set of InetSocketAddress with wildcards for all ports */ public Set<InetSocketAddress> getWildcardAddresses() { return addresses.stream().map(a -> new InetSocketAddress(a.getPort())).collect(Collectors.toSet()); } /** * Returns all ports * * @return list of all ports */ public List<Integer> getAllPorts() { return addresses.stream().map(InetSocketAddress::getPort).distinct().collect(Collectors.toList()); } /** * Returns distinct list of all host strings * * @return list of all hosts */ public List<String> getAllHostStrings() { return addresses.stream().map(InetSocketAddress::getHostString).distinct().collect(Collectors.toList()); } public void addAddress(InetSocketAddress address) { addresses.add(address); } /** * Returns a reachable address. If none is reachable than throws exception. * The function is nondeterministic in the sense that the result of calling this function * twice with the same set of reachable addresses might lead to different results. * * @return address which is reachable. * @throws NoRouteToHostException if none of the addresses are reachable */ public InetSocketAddress getReachableAddress() throws NoRouteToHostException { // using parallelStream() + findAny() will help to minimize the time spent on network operations return addresses.parallelStream() .filter(this::checkIfAddressIsReachable) .findAny() .orElseThrow(() -> new NoRouteToHostException("No valid address among " + addresses)); } /** * Returns a set of all reachable addresses. If none is reachable than returns empty set. * * @return all addresses which are reachable. */ public Set<InetSocketAddress> getAllReachableAddresses() { // using parallelStream() will help to minimize the time spent on network operations return addresses.parallelStream() .filter(this::checkIfAddressIsReachable) .collect(Collectors.toSet()); } /** * Returns a set of all reachable addresses. If none is reachable than returns all addresses. * * @return all reachable addresses, or all addresses if none is reachable. */ public Set<InetSocketAddress> getAllReachableAddressesOrAll() { // if there is only a single address provided then we don't need to do any reachability check if (addresses.size() == 1) { return getAllAddresses(); } Set<InetSocketAddress> allReachable = getAllReachableAddresses(); if (allReachable.isEmpty()) { return getAllAddresses(); } return allReachable; } /** * Returns a reachable address or an arbitrary one, if none is reachable. It throws an exception * if there are no addresses registered. The function is nondeterministic in the sense that the * result of calling this function twice with the same set of reachable addresses might lead * to different results. * * @return address which is reachable or fist one. * @throws NoSuchElementException if there is no address registered */ public InetSocketAddress getReachableOrOne() { InetSocketAddress address; // if there is only a single address provided then we don't do any reachability check if (addresses.size() == 1) { return getOne(); } try { address = getReachableAddress(); } catch (NoRouteToHostException e) { address = getOne(); } return address; } /** * Performs a parallel DNS lookup for all addresses. * * If the DNS lookup fails, then address remain unmodified. */ public void recreateSocketAddresses() { addresses = addresses.parallelStream() .map(this::recreateSocketAddress) .collect(Collectors.toCollection(MultipleAddresses::newConcurrentHashSet)); } /** * Returns an address from the set. * * @return address from a set. * @throws NoSuchElementException if there is no address registered */ public InetSocketAddress getOne() { return addresses.iterator().next(); } /** * Returns the number of addresses in the set. * * @return the number of addresses. */ public int size() { return addresses.size(); } private boolean checkIfAddressIsReachable(InetSocketAddress address) { if (address.isUnresolved()) { return false; } try { if (address.getAddress().isReachable((int) timeout.toMillis())) { return true; } } catch (IOException ignored) { // ignore, we don't really care if we can't reach it for timeout or for IO problems } return false; } private InetSocketAddress recreateSocketAddress(InetSocketAddress address) { try { return new InetSocketAddress(InetAddress.getByName(address.getHostString()), address.getPort()); } catch (UnknownHostException e) { return address; } } @Override public boolean equals(Object o) { if (this == o) { return true; } else if (o == null || getClass() != o.getClass()) { return false; } MultipleAddresses that = (MultipleAddresses) o; return Objects.equals(addresses, that.addresses); } @Override public int hashCode() { return Objects.hash(addresses); } @Override public String toString() { return addresses.stream().map(InetSocketAddress::toString).collect(Collectors.joining("|")); } }
⏎ org/apache/zookeeper/server/quorum/MultipleAddresses.java
Or download all of them as a single archive file:
File name: zookeeper-server-3.7.0-fyi.zip File size: 871011 bytes Release date: 2021-05-17 Download
⇒ Apache ZooKeeper 3.7.0 Jute Source Code
⇐ Download Apache ZooKeeper 3.7.0 Source Package
2022-11-16, 24810👍, 0💬
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