1 /*
2 * Copyright (c) 1997, 2015, 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.Logger;
41 import java.util.Optional;
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<InetSocketAddress,ServerState>();
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 final int finalPortNum = port;
87 Optional<ServerState> stateOpt =
88 servers.values()
89 .stream()
90 .filter(s -> s.getServer()
91 .getAddress()
92 .getPort() == finalPortNum)
93 .findAny();
94
95 if (inetAddress.getAddress().isAnyLocalAddress() &&
96 stateOpt.isPresent()) {
97 state = stateOpt.get();
98 } else {
99 logger.fine("Creating new HTTP Server at "+inetAddress);
100 // Creates server with default socket backlog
101 server = HttpServer.create(inetAddress, 0);
102 server.setExecutor(Executors.newCachedThreadPool());
103 String path = url.toURI().getPath();
104 logger.fine("Creating HTTP Context at = "+path);
105 HttpContext context = server.createContext(path);
106 server.start();
107
108 // we have to get actual inetAddress from server, which can differ from the original in some cases.
109 // e.g. A port number of zero will let the system pick up an ephemeral port in a bind operation,
110 // or IP: 0.0.0.0 - which is used to monitor network traffic from any valid IP address
111 inetAddress = server.getAddress();
112
113 logger.fine("HTTP server started = "+inetAddress);
114 state = new ServerState(server, path);
115 servers.put(inetAddress, state);
116 return context;
117 }
118 }
119 }
120 server = state.getServer();
121
122 if (state.getPaths().contains(url.getPath())) {
123 String err = "Context with URL path "+url.getPath()+ " already exists on the server "+server.getAddress();
124 logger.fine(err);
125 throw new IllegalArgumentException(err);
126 }
127
128 logger.fine("Creating HTTP Context at = "+url.getPath());
129 HttpContext context = server.createContext(url.getPath());
130 state.oneMoreContext(url.getPath());
131 return context;
132 } catch(Exception e) {
133 throw new ServerRtException("server.rt.err",e );
134 }
135 }
136
137 /*
138 * Removes a context. If the server doesn't have anymore contexts, it
139 * would stop the server and server is removed from servers Map.
140 */
141 /*package*/ void removeContext(HttpContext context) {
142 InetSocketAddress inetAddress = context.getServer().getAddress();
143 synchronized(servers) {
144 ServerState state = servers.get(inetAddress);
145 int instances = state.noOfContexts();
146 if (instances < 2) {
147 ((ExecutorService)state.getServer().getExecutor()).shutdown();
148 state.getServer().stop(0);
149 servers.remove(inetAddress);
150 } else {
151 state.getServer().removeContext(context);
152 state.oneLessContext(context.getPath());
153 }
154 }
155 }
156
157 private static final class ServerState {
158 private final HttpServer server;
159 private int instances;
160 private Set<String> paths = new HashSet<String>();
161
162 ServerState(HttpServer server, String path) {
163 this.server = server;
164 this.instances = 1;
165 paths.add(path);
166 }
167
168 public HttpServer getServer() {
169 return server;
170 }
171
172 public void oneMoreContext(String path) {
173 ++instances;
174 paths.add(path);
175 }
176
177 public void oneLessContext(String path) {
178 --instances;
179 paths.remove(path);
180 }
181
182 public int noOfContexts() {
183 return instances;
184 }
185
186 public Set<String> getPaths() {
187 return paths;
188 }
189 }
190 }