Shuyi Chen | d7955ce | 2013-05-22 14:51:55 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2009 Mike Cumings |
| 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 | |
| 17 | package com.kenai.jbosh; |
| 18 | |
| 19 | import java.net.URI; |
| 20 | import javax.net.ssl.SSLContext; |
| 21 | |
| 22 | /** |
| 23 | * BOSH client configuration information. Instances of this class contain |
| 24 | * all information necessary to establish connectivity with a remote |
| 25 | * connection manager. |
| 26 | * <p/> |
| 27 | * Instances of this class are immutable, thread-safe, |
| 28 | * and can be re-used to configure multiple client session instances. |
| 29 | */ |
| 30 | public final class BOSHClientConfig { |
| 31 | |
| 32 | /** |
| 33 | * Connection manager URI. |
| 34 | */ |
| 35 | private final URI uri; |
| 36 | |
| 37 | /** |
| 38 | * Target domain. |
| 39 | */ |
| 40 | private final String to; |
| 41 | |
| 42 | /** |
| 43 | * Client ID of this station. |
| 44 | */ |
| 45 | private final String from; |
| 46 | |
| 47 | /** |
| 48 | * Default XML language. |
| 49 | */ |
| 50 | private final String lang; |
| 51 | |
| 52 | /** |
| 53 | * Routing information for messages sent to CM. |
| 54 | */ |
| 55 | private final String route; |
| 56 | |
| 57 | /** |
| 58 | * Proxy host. |
| 59 | */ |
| 60 | private final String proxyHost; |
| 61 | |
| 62 | /** |
| 63 | * Proxy port. |
| 64 | */ |
| 65 | private final int proxyPort; |
| 66 | |
| 67 | /** |
| 68 | * SSL context. |
| 69 | */ |
| 70 | private final SSLContext sslContext; |
| 71 | |
| 72 | /** |
| 73 | * Flag indicating that compression should be attempted, if possible. |
| 74 | */ |
| 75 | private final boolean compressionEnabled; |
| 76 | |
| 77 | /////////////////////////////////////////////////////////////////////////// |
| 78 | // Classes: |
| 79 | |
| 80 | /** |
| 81 | * Class instance builder, after the builder pattern. This allows each |
| 82 | * {@code BOSHClientConfig} instance to be immutable while providing |
| 83 | * flexibility when building new {@code BOSHClientConfig} instances. |
| 84 | * <p/> |
| 85 | * Instances of this class are <b>not</b> thread-safe. If template-style |
| 86 | * use is desired, see the {@code create(BOSHClientConfig)} method. |
| 87 | */ |
| 88 | public static final class Builder { |
| 89 | // Required args |
| 90 | private final URI bURI; |
| 91 | private final String bDomain; |
| 92 | |
| 93 | // Optional args |
| 94 | private String bFrom; |
| 95 | private String bLang; |
| 96 | private String bRoute; |
| 97 | private String bProxyHost; |
| 98 | private int bProxyPort; |
| 99 | private SSLContext bSSLContext; |
| 100 | private Boolean bCompression; |
| 101 | |
| 102 | /** |
| 103 | * Creates a new builder instance, used to create instances of the |
| 104 | * {@code BOSHClientConfig} class. |
| 105 | * |
| 106 | * @param cmURI URI to use to contact the connection manager |
| 107 | * @param domain target domain to communicate with |
| 108 | */ |
| 109 | private Builder(final URI cmURI, final String domain) { |
| 110 | bURI = cmURI; |
| 111 | bDomain = domain; |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * Creates a new builder instance, used to create instances of the |
| 116 | * {@code BOSHClientConfig} class. |
| 117 | * |
| 118 | * @param cmURI URI to use to contact the connection manager |
| 119 | * @param domain target domain to communicate with |
| 120 | * @return builder instance |
| 121 | */ |
| 122 | public static Builder create(final URI cmURI, final String domain) { |
| 123 | if (cmURI == null) { |
| 124 | throw(new IllegalArgumentException( |
| 125 | "Connection manager URI must not be null")); |
| 126 | } |
| 127 | if (domain == null) { |
| 128 | throw(new IllegalArgumentException( |
| 129 | "Target domain must not be null")); |
| 130 | } |
| 131 | String scheme = cmURI.getScheme(); |
| 132 | if (!("http".equals(scheme) || "https".equals(scheme))) { |
| 133 | throw(new IllegalArgumentException( |
| 134 | "Only 'http' and 'https' URI are allowed")); |
| 135 | } |
| 136 | return new Builder(cmURI, domain); |
| 137 | } |
| 138 | |
| 139 | /** |
| 140 | * Creates a new builder instance using the existing configuration |
| 141 | * provided as a starting point. |
| 142 | * |
| 143 | * @param cfg configuration to copy |
| 144 | * @return builder instance |
| 145 | */ |
| 146 | public static Builder create(final BOSHClientConfig cfg) { |
| 147 | Builder result = new Builder(cfg.getURI(), cfg.getTo()); |
| 148 | result.bFrom = cfg.getFrom(); |
| 149 | result.bLang = cfg.getLang(); |
| 150 | result.bRoute = cfg.getRoute(); |
| 151 | result.bProxyHost = cfg.getProxyHost(); |
| 152 | result.bProxyPort = cfg.getProxyPort(); |
| 153 | result.bSSLContext = cfg.getSSLContext(); |
| 154 | result.bCompression = cfg.isCompressionEnabled(); |
| 155 | return result; |
| 156 | } |
| 157 | |
| 158 | /** |
| 159 | * Set the ID of the client station, to be forwarded to the connection |
| 160 | * manager when new sessions are created. |
| 161 | * |
| 162 | * @param id client ID |
| 163 | * @return builder instance |
| 164 | */ |
| 165 | public Builder setFrom(final String id) { |
| 166 | if (id == null) { |
| 167 | throw(new IllegalArgumentException( |
| 168 | "Client ID must not be null")); |
| 169 | } |
| 170 | bFrom = id; |
| 171 | return this; |
| 172 | } |
| 173 | |
| 174 | /** |
| 175 | * Set the default language of any human-readable content within the |
| 176 | * XML. |
| 177 | * |
| 178 | * @param lang XML language ID |
| 179 | * @return builder instance |
| 180 | */ |
| 181 | public Builder setXMLLang(final String lang) { |
| 182 | if (lang == null) { |
| 183 | throw(new IllegalArgumentException( |
| 184 | "Default language ID must not be null")); |
| 185 | } |
| 186 | bLang = lang; |
| 187 | return this; |
| 188 | } |
| 189 | |
| 190 | /** |
| 191 | * Sets the destination server/domain that the client should connect to. |
| 192 | * Connection managers may be configured to enable sessions with more |
| 193 | * that one server in different domains. When requesting a session with |
| 194 | * such a "proxy" connection manager, a client should use this method to |
| 195 | * specify the server with which it wants to communicate. |
| 196 | * |
| 197 | * @param protocol connection protocol (e.g, "xmpp") |
| 198 | * @param host host or domain to be served by the remote server. Note |
| 199 | * that this is not necessarily the host name or domain name of the |
| 200 | * remote server. |
| 201 | * @param port port number of the remote server |
| 202 | * @return builder instance |
| 203 | */ |
| 204 | public Builder setRoute( |
| 205 | final String protocol, |
| 206 | final String host, |
| 207 | final int port) { |
| 208 | if (protocol == null) { |
| 209 | throw(new IllegalArgumentException("Protocol cannot be null")); |
| 210 | } |
| 211 | if (protocol.contains(":")) { |
| 212 | throw(new IllegalArgumentException( |
| 213 | "Protocol cannot contain the ':' character")); |
| 214 | } |
| 215 | if (host == null) { |
| 216 | throw(new IllegalArgumentException("Host cannot be null")); |
| 217 | } |
| 218 | if (host.contains(":")) { |
| 219 | throw(new IllegalArgumentException( |
| 220 | "Host cannot contain the ':' character")); |
| 221 | } |
| 222 | if (port <= 0) { |
| 223 | throw(new IllegalArgumentException("Port number must be > 0")); |
| 224 | } |
| 225 | bRoute = protocol + ":" + host + ":" + port; |
| 226 | return this; |
| 227 | } |
| 228 | |
| 229 | /** |
| 230 | * Specify the hostname and port of an HTTP proxy to connect through. |
| 231 | * |
| 232 | * @param hostName proxy hostname |
| 233 | * @param port proxy port number |
| 234 | * @return builder instance |
| 235 | */ |
| 236 | public Builder setProxy(final String hostName, final int port) { |
| 237 | if (hostName == null || hostName.length() == 0) { |
| 238 | throw(new IllegalArgumentException( |
| 239 | "Proxy host name cannot be null or empty")); |
| 240 | } |
| 241 | if (port <= 0) { |
| 242 | throw(new IllegalArgumentException( |
| 243 | "Proxy port must be > 0")); |
| 244 | } |
| 245 | bProxyHost = hostName; |
| 246 | bProxyPort = port; |
| 247 | return this; |
| 248 | } |
| 249 | |
| 250 | /** |
| 251 | * Set the SSL context to use for this session. This can be used |
| 252 | * to configure certificate-based authentication, etc.. |
| 253 | * |
| 254 | * @param ctx SSL context |
| 255 | * @return builder instance |
| 256 | */ |
| 257 | public Builder setSSLContext(final SSLContext ctx) { |
| 258 | if (ctx == null) { |
| 259 | throw(new IllegalArgumentException( |
| 260 | "SSL context cannot be null")); |
| 261 | } |
| 262 | bSSLContext = ctx; |
| 263 | return this; |
| 264 | } |
| 265 | |
| 266 | /** |
| 267 | * Set whether or not compression of the underlying data stream |
| 268 | * should be attempted. By default, compression is disabled. |
| 269 | * |
| 270 | * @param enabled set to {@code true} if compression should be |
| 271 | * attempted when possible, {@code false} to disable compression |
| 272 | * @return builder instance |
| 273 | */ |
| 274 | public Builder setCompressionEnabled(final boolean enabled) { |
| 275 | bCompression = Boolean.valueOf(enabled); |
| 276 | return this; |
| 277 | } |
| 278 | |
| 279 | /** |
| 280 | * Build the immutable object instance with the current configuration. |
| 281 | * |
| 282 | * @return BOSHClientConfig instance |
| 283 | */ |
| 284 | public BOSHClientConfig build() { |
| 285 | // Default XML language |
| 286 | String lang; |
| 287 | if (bLang == null) { |
| 288 | lang = "en"; |
| 289 | } else { |
| 290 | lang = bLang; |
| 291 | } |
| 292 | |
| 293 | // Default proxy port |
| 294 | int port; |
| 295 | if (bProxyHost == null) { |
| 296 | port = 0; |
| 297 | } else { |
| 298 | port = bProxyPort; |
| 299 | } |
| 300 | |
| 301 | // Default compression |
| 302 | boolean compression; |
| 303 | if (bCompression == null) { |
| 304 | compression = false; |
| 305 | } else { |
| 306 | compression = bCompression.booleanValue(); |
| 307 | } |
| 308 | |
| 309 | return new BOSHClientConfig( |
| 310 | bURI, |
| 311 | bDomain, |
| 312 | bFrom, |
| 313 | lang, |
| 314 | bRoute, |
| 315 | bProxyHost, |
| 316 | port, |
| 317 | bSSLContext, |
| 318 | compression); |
| 319 | } |
| 320 | |
| 321 | } |
| 322 | |
| 323 | /////////////////////////////////////////////////////////////////////////// |
| 324 | // Constructor: |
| 325 | |
| 326 | /** |
| 327 | * Prevent direct construction. |
| 328 | * |
| 329 | * @param cURI URI of the connection manager to connect to |
| 330 | * @param cDomain the target domain of the first stream |
| 331 | * @param cFrom client ID |
| 332 | * @param cLang default XML language |
| 333 | * @param cRoute target route |
| 334 | * @param cProxyHost proxy host |
| 335 | * @param cProxyPort proxy port |
| 336 | * @param cSSLContext SSL context |
| 337 | * @param cCompression compression enabled flag |
| 338 | */ |
| 339 | private BOSHClientConfig( |
| 340 | final URI cURI, |
| 341 | final String cDomain, |
| 342 | final String cFrom, |
| 343 | final String cLang, |
| 344 | final String cRoute, |
| 345 | final String cProxyHost, |
| 346 | final int cProxyPort, |
| 347 | final SSLContext cSSLContext, |
| 348 | final boolean cCompression) { |
| 349 | uri = cURI; |
| 350 | to = cDomain; |
| 351 | from = cFrom; |
| 352 | lang = cLang; |
| 353 | route = cRoute; |
| 354 | proxyHost = cProxyHost; |
| 355 | proxyPort = cProxyPort; |
| 356 | sslContext = cSSLContext; |
| 357 | compressionEnabled = cCompression; |
| 358 | } |
| 359 | |
| 360 | /** |
| 361 | * Get the URI to use to contact the connection manager. |
| 362 | * |
| 363 | * @return connection manager URI. |
| 364 | */ |
| 365 | public URI getURI() { |
| 366 | return uri; |
| 367 | } |
| 368 | |
| 369 | /** |
| 370 | * Get the ID of the target domain. |
| 371 | * |
| 372 | * @return domain id |
| 373 | */ |
| 374 | public String getTo() { |
| 375 | return to; |
| 376 | } |
| 377 | |
| 378 | /** |
| 379 | * Get the ID of the local client. |
| 380 | * |
| 381 | * @return client id, or {@code null} |
| 382 | */ |
| 383 | public String getFrom() { |
| 384 | return from; |
| 385 | } |
| 386 | |
| 387 | /** |
| 388 | * Get the default language of any human-readable content within the |
| 389 | * XML. Defaults to "en". |
| 390 | * |
| 391 | * @return XML language ID |
| 392 | */ |
| 393 | public String getLang() { |
| 394 | return lang; |
| 395 | } |
| 396 | |
| 397 | /** |
| 398 | * Get the routing information for messages sent to the CM. |
| 399 | * |
| 400 | * @return route attribute string, or {@code null} if no routing |
| 401 | * info was provided. |
| 402 | */ |
| 403 | public String getRoute() { |
| 404 | return route; |
| 405 | } |
| 406 | |
| 407 | /** |
| 408 | * Get the HTTP proxy host to use. |
| 409 | * |
| 410 | * @return proxy host, or {@code null} if no proxy information was specified |
| 411 | */ |
| 412 | public String getProxyHost() { |
| 413 | return proxyHost; |
| 414 | } |
| 415 | |
| 416 | /** |
| 417 | * Get the HTTP proxy port to use. |
| 418 | * |
| 419 | * @return proxy port, or 0 if no proxy information was specified |
| 420 | */ |
| 421 | public int getProxyPort() { |
| 422 | return proxyPort; |
| 423 | } |
| 424 | |
| 425 | /** |
| 426 | * Get the SSL context to use for this session. |
| 427 | * |
| 428 | * @return SSL context instance to use, or {@code null} if no |
| 429 | * context instance was provided. |
| 430 | */ |
| 431 | public SSLContext getSSLContext() { |
| 432 | return sslContext; |
| 433 | } |
| 434 | |
| 435 | /** |
| 436 | * Determines whether or not compression of the underlying data stream |
| 437 | * should be attempted/allowed. Defaults to {@code false}. |
| 438 | * |
| 439 | * @return {@code true} if compression should be attempted, {@code false} |
| 440 | * if compression is disabled or was not specified |
| 441 | */ |
| 442 | boolean isCompressionEnabled() { |
| 443 | return compressionEnabled; |
| 444 | } |
| 445 | |
| 446 | } |