1 /*
2 * Copyright (c) 1997, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.xml.internal.ws.transport.http.server;
27
28 import com.sun.net.httpserver.HttpContext;
29 import com.sun.net.httpserver.HttpServer;
30 import com.sun.xml.internal.ws.server.ServerRtException;
31
32 import java.net.InetSocketAddress;
33 import java.net.URL;
34 import java.util.HashMap;
35 import java.util.HashSet;
36 import java.util.Map;
37 import java.util.Set;
38 import java.util.concurrent.ExecutorService;
39 import java.util.concurrent.Executors;
40 import java.util.logging.Level;
41 import java.util.logging.Logger;
42
43
44 /**
45 * Manages all the WebService HTTP servers created by JAXWS runtime.
46 *
47 * @author Jitendra Kotamraju
48 */
49 final class ServerMgr {
50
51 private static final ServerMgr serverMgr = new ServerMgr();
52 private static final Logger LOGGER =
53 Logger.getLogger(
54 com.sun.xml.internal.ws.util.Constants.LoggingDomain + ".server.http");
55 private final Map<InetSocketAddress,ServerState> servers = new HashMap<>();
56
57 private ServerMgr() {}
58
59 /**
60 * Gets the singleton instance.
61 * @return manager instance
62 */
63 static ServerMgr getInstance() {
64 return serverMgr;
65 }
66
67 /*
68 * Creates a HttpContext at the given address. If there is already a server
69 * it uses that server to create a context. Otherwise, it creates a new
70 * HTTP server. This sever is added to servers Map.
71 */
72 /*package*/ HttpContext createContext(String address) {
73 try {
74 HttpServer server;
75 ServerState state;
76 URL url = new URL(address);
77 int port = url.getPort();
78 if (port == -1) {
79 port = url.getDefaultPort();
80 }
81 InetSocketAddress inetAddress = new InetSocketAddress(url.getHost(),
82 port);
83 synchronized(servers) {
84 state = servers.get(inetAddress);
85 if (state == null) {
86 ServerState free = null;
87 for (ServerState ss : servers.values()) {
88 if (port == ss.getServer().getAddress().getPort()) {
89 free = ss;
90 break;
91 }
92 }
93 if (inetAddress.getAddress().isAnyLocalAddress() && free != null) {
94 state = free;
95 } else {
96 if (LOGGER.isLoggable(Level.FINE)) {
97 LOGGER.fine("Creating new HTTP Server at "+inetAddress);
98 }
99 // Creates server with default socket backlog
100 server = HttpServer.create(inetAddress, 0);
101 server.setExecutor(Executors.newCachedThreadPool());
102 String path = url.toURI().getPath();
103 if (LOGGER.isLoggable(Level.FINE)) {
104 LOGGER.fine("Creating HTTP Context at = "+path);
105 }
106 HttpContext context = server.createContext(path);
107 server.start();
108
109 // we have to get actual inetAddress from server, which can differ from the original in some cases.
110 // e.g. A port number of zero will let the system pick up an ephemeral port in a bind operation,
111 // or IP: 0.0.0.0 - which is used to monitor network traffic from any valid IP address
112 inetAddress = server.getAddress();
113
114 if (LOGGER.isLoggable(Level.FINE)) {
115 LOGGER.fine("HTTP server started = "+inetAddress);
116 }
117 state = new ServerState(server, path);
118 servers.put(inetAddress, state);
119 return context;
120 }
121 }
122 }
123 server = state.getServer();
124
125 if (state.getPaths().contains(url.getPath())) {
126 String err = "Context with URL path "+url.getPath()+ " already exists on the server "+server.getAddress();
127 if (LOGGER.isLoggable(Level.FINE)) {
128 LOGGER.fine(err);
129 }
130 throw new IllegalArgumentException(err);
131 }
132
133 if (LOGGER.isLoggable(Level.FINE)) {
134 LOGGER.fine("Creating HTTP Context at = "+url.getPath());
135 }
136 HttpContext context = server.createContext(url.getPath());
137 state.oneMoreContext(url.getPath());
138 return context;
139 } catch(Exception e) {
140 throw new ServerRtException("server.rt.err",e );
141 }
142 }
143
144 /*
145 * Removes a context. If the server doesn't have anymore contexts, it
146 * would stop the server and server is removed from servers Map.
147 */
148 /*package*/ void removeContext(HttpContext context) {
149 InetSocketAddress inetAddress = context.getServer().getAddress();
150 synchronized(servers) {
151 ServerState state = servers.get(inetAddress);
152 int instances = state.noOfContexts();
153 if (instances < 2) {
154 ((ExecutorService)state.getServer().getExecutor()).shutdown();
155 state.getServer().stop(0);
156 servers.remove(inetAddress);
157 } else {
158 state.getServer().removeContext(context);
159 state.oneLessContext(context.getPath());
160 }
161 }
162 }
163
164 private static final class ServerState {
165 private final HttpServer server;
166 private int instances;
167 private final Set<String> paths = new HashSet<>();
168
169 ServerState(HttpServer server, String path) {
170 this.server = server;
171 this.instances = 1;
172 paths.add(path);
173 }
174
175 public HttpServer getServer() {
176 return server;
177 }
178
179 public void oneMoreContext(String path) {
180 ++instances;
181 paths.add(path);
182 }
183
184 public void oneLessContext(String path) {
185 --instances;
186 paths.remove(path);
187 }
188
189 public int noOfContexts() {
190 return instances;
191 }
192
193 public Set<String> getPaths() {
194 return paths;
195 }
196 }
197 }