Java tutorial
package org.eclipse.aether.transport.http; /* * 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. */ import java.util.LinkedList; import org.apache.http.auth.AuthScheme; import org.apache.http.client.params.AuthPolicy; import org.apache.http.impl.auth.BasicScheme; /** * Pool of (equivalent) auth schemes for a single host. */ final class AuthSchemePool { private final LinkedList<AuthScheme> authSchemes; private String schemeName; AuthSchemePool() { authSchemes = new LinkedList<AuthScheme>(); } public synchronized AuthScheme get() { AuthScheme authScheme = null; if (!authSchemes.isEmpty()) { authScheme = authSchemes.removeLast(); } else if (AuthPolicy.BASIC.equalsIgnoreCase(schemeName)) { authScheme = new BasicScheme(); } return authScheme; } public synchronized void put(AuthScheme authScheme) { if (authScheme == null) { return; } if (!authScheme.getSchemeName().equals(schemeName)) { schemeName = authScheme.getSchemeName(); authSchemes.clear(); } authSchemes.add(authScheme); } }