1 /* 2 * Copyright (C) 2013 Square, Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.squareup.okhttp.internal; 17 18 import com.squareup.okhttp.Route; 19 import java.util.LinkedHashSet; 20 import java.util.Set; 21 22 /** 23 * A blacklist of failed routes to avoid when creating a new connection to a 24 * target address. This is used so that OkHttp can learn from its mistakes: if 25 * there was a failure attempting to connect to a specific IP address or proxy 26 * server, that failure is remembered and alternate routes are preferred. 27 */ 28 public final class RouteDatabase { 29 private final Set<Route> failedRoutes = new LinkedHashSet<>(); 30 31 /** Records a failure connecting to {@code failedRoute}. */ 32 public synchronized void failed(Route failedRoute) { 33 failedRoutes.add(failedRoute); 34 } 35 36 /** Records success connecting to {@code failedRoute}. */ 37 public synchronized void connected(Route route) { 38 failedRoutes.remove(route); 39 } 40 41 /** Returns true if {@code route} has failed recently and should be avoided. */ 42 public synchronized boolean shouldPostpone(Route route) { 43 return failedRoutes.contains(route); 44 } 45 46 public synchronized int failedRoutesCount() { 47 return failedRoutes.size(); 48 } 49 } 50
