| 1 | /* |
| 2 | Copyright (C) 2005 MySQL AB |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of version 2 of the GNU General Public License as |
| 6 | published by the Free Software Foundation. |
| 7 | |
| 8 | There are special exceptions to the terms and conditions of the GPL |
| 9 | as it is applied to this software. View the full text of the |
| 10 | exception in file EXCEPTIONS-CONNECTOR-J in the directory of this |
| 11 | software distribution. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 21 | |
| 22 | */ |
| 23 | package com.mysql.jdbc.jdbc2.optional; |
| 24 | |
| 25 | import java.sql.Connection; |
| 26 | import java.sql.ResultSet; |
| 27 | import java.sql.SQLException; |
| 28 | import java.sql.Statement; |
| 29 | import java.util.ArrayList; |
| 30 | import java.util.Collections; |
| 31 | import java.util.HashMap; |
| 32 | import java.util.List; |
| 33 | import java.util.Map; |
| 34 | |
| 35 | import javax.sql.XAConnection; |
| 36 | import javax.transaction.xa.XAException; |
| 37 | import javax.transaction.xa.XAResource; |
| 38 | import javax.transaction.xa.Xid; |
| 39 | |
| 40 | import com.mysql.jdbc.log.Log; |
| 41 | |
| 42 | /* |
| 43 | * XA BEGIN <xid> [JOIN | RESUME] XA START TRANSACTION <xid> [JOIN | RESUME] XA |
| 44 | * COMMIT <xid> [ONE PHASE] XA END <xid> [SUSPEND [FOR MIGRATE]] XA PREPARE |
| 45 | * <xid> XA RECOVER XA ROLLBACK <xid> |
| 46 | */ |
| 47 | |
| 48 | /** |
| 49 | * An object that provides support for distributed transactions. An |
| 50 | * <code>XAConnection</code> object may be enlisted in a distributed |
| 51 | * transaction by means of an <code>XAResource</code> object. A transaction |
| 52 | * manager, usually part of a middle tier server, manages an |
| 53 | * <code>XAConnection</code> object through the <code>XAResource</code> |
| 54 | * object. |
| 55 | * <P> |
| 56 | * An application programmer does not use this interface directly; rather, it is |
| 57 | * used by a transaction manager working in the middle tier server. |
| 58 | * |
| 59 | * @since 1.4 |
| 60 | */ |
| 61 | public class MysqlXAConnection extends MysqlPooledConnection implements |
| 62 | XAConnection, XAResource { |
| 63 | |
| 64 | private com.mysql.jdbc.Connection underlyingConnection; |
| 65 | |
| 66 | private final static Map MYSQL_ERROR_CODES_TO_XA_ERROR_CODES; |
| 67 | |
| 68 | private Log log; |
| 69 | |
| 70 | static { |
| 71 | HashMap temp = new HashMap(); |
| 72 | |
| 73 | temp.put(new Integer(1397), new Integer(XAException.XAER_NOTA)); |
| 74 | temp.put(new Integer(1398), new Integer(XAException.XAER_INVAL)); |
| 75 | temp.put(new Integer(1399), new Integer(XAException.XAER_RMFAIL)); |
| 76 | temp.put(new Integer(1400), new Integer(XAException.XAER_OUTSIDE)); |
| 77 | temp.put(new Integer(1401), new Integer(XAException.XAER_RMERR)); |
| 78 | temp.put(new Integer(1402), new Integer(XAException.XA_RBROLLBACK)); |
| 79 | |
| 80 | MYSQL_ERROR_CODES_TO_XA_ERROR_CODES = Collections.unmodifiableMap(temp); |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * @param connection |
| 85 | */ |
| 86 | public MysqlXAConnection(com.mysql.jdbc.Connection connection) |
| 87 | throws SQLException { |
| 88 | super(connection); |
| 89 | this.underlyingConnection = connection; |
| 90 | this.log = connection.getLog(); |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * Retrieves an <code>XAResource</code> object that the transaction |
| 95 | * manager will use to manage this <code>XAConnection</code> object's |
| 96 | * participation in a distributed transaction. |
| 97 | * |
| 98 | * @return the <code>XAResource</code> object |
| 99 | * @exception SQLException |
| 100 | * if a database access error occurs |
| 101 | */ |
| 102 | public XAResource getXAResource() throws SQLException { |
| 103 | return this; |
| 104 | } |
| 105 | |
| 106 | /** |
| 107 | * Obtains the current transaction timeout value set for this XAResource |
| 108 | * instance. If XAResource.setTransactionTimeout was not used prior to |
| 109 | * invoking this method, the return value is the default timeout set for the |
| 110 | * resource manager; otherwise, the value used in the previous |
| 111 | * setTransactionTimeout call is returned. |
| 112 | * |
| 113 | * @return the transaction timeout value in seconds. |
| 114 | * |
| 115 | * @throws XAException |
| 116 | * An error has occurred. Possible exception values are |
| 117 | * XAER_RMERR and XAER_RMFAIL. |
| 118 | */ |
| 119 | public int getTransactionTimeout() throws XAException { |
| 120 | // TODO Auto-generated method stub |
| 121 | return 0; |
| 122 | } |
| 123 | |
| 124 | /** |
| 125 | * Sets the current transaction timeout value for this XAResource instance. |
| 126 | * Once set, this timeout value is effective until setTransactionTimeout is |
| 127 | * invoked again with a different value. |
| 128 | * |
| 129 | * To reset the timeout value to the default value used by the resource |
| 130 | * manager, set the value to zero. If the timeout operation is performed |
| 131 | * successfully, the method returns true; otherwise false. |
| 132 | * |
| 133 | * If a resource manager does not support explicitly setting the transaction |
| 134 | * timeout value, this method returns false. |
| 135 | * |
| 136 | * @parameter seconds The transaction timeout value in seconds. |
| 137 | * |
| 138 | * @return true if the transaction timeout value is set successfully; |
| 139 | * otherwise false. |
| 140 | * |
| 141 | * @throws XAException |
| 142 | * An error has occurred. Possible exception values are |
| 143 | * XAER_RMERR, XAER_RMFAIL, or XAER_INVAL. |
| 144 | */ |
| 145 | public boolean setTransactionTimeout(int arg0) throws XAException { |
| 146 | // TODO Auto-generated method stub |
| 147 | return false; |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * This method is called to determine if the resource manager instance |
| 152 | * represented by the target object is the same as the resouce manager |
| 153 | * instance represented by the parameter xares. |
| 154 | * |
| 155 | * @parameter xares An XAResource object whose resource manager instance is |
| 156 | * to be compared with the resource manager instance of the |
| 157 | * target object. |
| 158 | * |
| 159 | * @return true if it's the same RM instance; otherwise false. |
| 160 | * |
| 161 | * @throws XAException |
| 162 | * An error has occurred. Possible exception values are |
| 163 | * XAER_RMERR and XAER_RMFAIL. |
| 164 | */ |
| 165 | public boolean isSameRM(XAResource xares) throws XAException { |
| 166 | |
| 167 | if (xares instanceof MysqlXAConnection) { |
| 168 | return this.underlyingConnection |
| 169 | .isSameResource(((MysqlXAConnection) xares).underlyingConnection); |
| 170 | } |
| 171 | |
| 172 | return false; |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * This method is called to obtain a list of prepared transaction branches |
| 177 | * from a resource manager. The transaction manager calls this method during |
| 178 | * recovery to obtain the list of transaction branches that are currently in |
| 179 | * prepared or heuristically completed states. |
| 180 | * |
| 181 | * The flag parameter indicates where the recover scan should start or end, |
| 182 | * or start and end. This method may be invoked one or more times during a |
| 183 | * recovery scan. The resource manager maintains a cursor which marks the |
| 184 | * current position of the prepared or heuristically completed transaction list. |
| 185 | * Each invocation of the recover method moves the cursor passed the set of Xids |
| 186 | * that are returned. |
| 187 | * |
| 188 | * Two consecutive invocation of this method that starts from the |
| 189 | * beginning of the list must return the same list of transaction branches |
| 190 | * unless one of the following takes place: |
| 191 | * |
| 192 | * - the transaction manager invokes the commit, forget, prepare, or rollback method for that resource |
| 193 | * manager, between the two consecutive invocation of the recovery scan. |
| 194 | * |
| 195 | * - the resource manager heuristically completes some transaction branches |
| 196 | * between the two invocation of the recovery scan. |
| 197 | * |
| 198 | * @param flag |
| 199 | * One of TMSTARTRSCAN, TMENDRSCAN, TMNOFLAGS. TMNOFLAGS must be |
| 200 | * used when no other flags are set in the parameter. |
| 201 | * |
| 202 | * @returns The resource manager returns zero or more XIDs of the |
| 203 | * transaction branches that are currently in a prepared or |
| 204 | * heuristically completed state. If an error occurs during the |
| 205 | * operation, the resource manager should throw the appropriate |
| 206 | * XAException. |
| 207 | * |
| 208 | * @throws XAException |
| 209 | * An error has occurred. Possible values are XAER_RMERR, |
| 210 | * XAER_RMFAIL, XAER_INVAL, and XAER_PROTO. |
| 211 | */ |
| 212 | public Xid[] recover(int flag) throws XAException { |
| 213 | return recover(this.underlyingConnection, flag); |
| 214 | } |
| 215 | |
| 216 | protected static Xid[] recover(Connection c, int flag) throws XAException { |
| 217 | /* |
| 218 | The XA RECOVER statement returns information for those XA transactions on the MySQL server that are in the PREPARED state. (See Section 13.4.7.2, ?XA Transaction States?.) The output includes a row for each such XA transaction on the server, regardless of which client started it. |
| 219 | |
| 220 | XA RECOVER output rows look like this (for an example xid value consisting of the parts 'abc', 'def', and 7): |
| 221 | |
| 222 | mysql> XA RECOVER; |
| 223 | +----------+--------------+--------------+--------+ |
| 224 | | formatID | gtrid_length | bqual_length | data | |
| 225 | +----------+--------------+--------------+--------+ |
| 226 | | 7 | 3 | 3 | abcdef | |
| 227 | +----------+--------------+--------------+--------+ |
| 228 | |
| 229 | The output columns have the following meanings: |
| 230 | |
| 231 | formatID is the formatID part of the transaction xid |
| 232 | gtrid_length is the length in bytes of the gtrid part of the xid |
| 233 | bqual_length is the length in bytes of the bqual part of the xid |
| 234 | data is the concatenation of the gtrid and bqual parts of the xid |
| 235 | */ |
| 236 | |
| 237 | boolean startRscan = ((flag & TMSTARTRSCAN) > 0); |
| 238 | boolean endRscan = ((flag & TMENDRSCAN) > 0); |
| 239 | |
| 240 | if (!startRscan && !endRscan && flag != TMNOFLAGS) { |
| 241 | throw new MysqlXAException(XAException.XAER_INVAL, |
| 242 | "Invalid flag, must use TMNOFLAGS, or any combination of TMSTARTRSCAN and TMENDRSCAN", |
| 243 | null); |
| 244 | } |
| 245 | |
| 246 | // |
| 247 | // We return all recovered XIDs at once, so if not |
| 248 | // TMSTARTRSCAN, return no new XIDs |
| 249 | // |
| 250 | // We don't attempt to maintain state to check for TMNOFLAGS |
| 251 | // "outside" of a scan |
| 252 | // |
| 253 | |
| 254 | if (!startRscan) { |
| 255 | return new Xid[0]; |
| 256 | } |
| 257 | |
| 258 | ResultSet rs = null; |
| 259 | Statement stmt = null; |
| 260 | |
| 261 | List recoveredXidList = new ArrayList(); |
| 262 | |
| 263 | try { |
| 264 | // TODO: Cache this for lifetime of XAConnection |
| 265 | stmt = c.createStatement(); |
| 266 | |
| 267 | rs = stmt.executeQuery("XA RECOVER"); |
| 268 | |
| 269 | while (rs.next()) { |
| 270 | final int formatId = rs.getInt(1); |
| 271 | int gtridLength = rs.getInt(2); |
| 272 | int bqualLength = rs.getInt(3); |
| 273 | byte[] gtridAndBqual = rs.getBytes(4); |
| 274 | |
| 275 | final byte[] gtrid = new byte[gtridLength]; |
| 276 | final byte[] bqual = new byte[bqualLength]; |
| 277 | |
| 278 | if (gtridAndBqual.length != (gtridLength + bqualLength)) { |
| 279 | throw new MysqlXAException(XAException.XA_RBPROTO, |
| 280 | "Error while recovering XIDs from RM. GTRID and BQUAL are wrong sizes", |
| 281 | null); |
| 282 | } |
| 283 | |
| 284 | System.arraycopy(gtridAndBqual, 0, gtrid, 0, |
| 285 | gtridLength); |
| 286 | System.arraycopy(gtridAndBqual, gtridLength, bqual, 0, |
| 287 | bqualLength); |
| 288 | |
| 289 | recoveredXidList.add(new MysqlXid(gtrid, bqual, |
| 290 | formatId)); |
| 291 | } |
| 292 | } catch (SQLException sqlEx) { |
| 293 | throw mapXAExceptionFromSQLException(sqlEx); |
| 294 | } finally { |
| 295 | if (rs != null) { |
| 296 | try { |
| 297 | rs.close(); |
| 298 | } catch (SQLException sqlEx) { |
| 299 | throw mapXAExceptionFromSQLException(sqlEx); |
| 300 | } |
| 301 | } |
| 302 | |
| 303 | if (stmt != null) { |
| 304 | try { |
| 305 | stmt.close(); |
| 306 | } catch (SQLException sqlEx) { |
| 307 | throw mapXAExceptionFromSQLException(sqlEx); |
| 308 | } |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | int numXids = recoveredXidList.size(); |
| 313 | |
| 314 | Xid[] asXids = new Xid[numXids]; |
| 315 | Object[] asObjects = recoveredXidList.toArray(); |
| 316 | |
| 317 | for (int i = 0; i < numXids; i++) { |
| 318 | asXids[i] = (Xid) asObjects[i]; |
| 319 | } |
| 320 | |
| 321 | return asXids; |
| 322 | } |
| 323 | |
| 324 | /** |
| 325 | * Asks the resource manager to prepare for a transaction commit of the |
| 326 | * transaction specified in xid. |
| 327 | * |
| 328 | * @parameter xid A global transaction identifier. |
| 329 | * |
| 330 | * @returns A value indicating the resource manager's vote on the outcome of |
| 331 | * the transaction. |
| 332 | * |
| 333 | * The possible values are: XA_RDONLY or XA_OK. If the resource manager |
| 334 | * wants to roll back the transaction, it should do so by raising an |
| 335 | * appropriate XAException in the prepare method. |
| 336 | * |
| 337 | * @throws XAException |
| 338 | * An error has occurred. Possible exception values are: XA_RB*, |
| 339 | * XAER_RMERR, XAER_RMFAIL, XAER_NOTA, XAER_INVAL, or |
| 340 | * XAER_PROTO. |
| 341 | */ |
| 342 | public int prepare(Xid xid) throws XAException { |
| 343 | StringBuffer commandBuf = new StringBuffer(); |
| 344 | commandBuf.append("XA PREPARE "); |
| 345 | commandBuf.append(xidToString(xid)); |
| 346 | |
| 347 | dispatchCommand(commandBuf.toString()); |
| 348 | |
| 349 | return XA_OK; // TODO: Check for read-only |
| 350 | } |
| 351 | |
| 352 | /** |
| 353 | * Tells the resource manager to forget about a heuristically completed |
| 354 | * transaction branch. |
| 355 | * |
| 356 | * @parameter xid A global transaction identifier. |
| 357 | * |
| 358 | * @throws XAException |
| 359 | * An error has occurred. Possible exception values are |
| 360 | * XAER_RMERR, XAER_RMFAIL, XAER_NOTA, XAER_INVAL, or |
| 361 | * XAER_PROTO. |
| 362 | */ |
| 363 | public void forget(Xid xid) throws XAException { |
| 364 | // TODO Auto-generated method stub |
| 365 | } |
| 366 | |
| 367 | /** |
| 368 | * Informs the resource manager to roll back work done on behalf of a |
| 369 | * transaction branch. |
| 370 | * |
| 371 | * @parameter xid A global transaction identifier. |
| 372 | * |
| 373 | * @throws XAException |
| 374 | * An error has occurred. Possible XAExceptions are XA_HEURHAZ, |
| 375 | * XA_HEURCOM, XA_HEURRB, XA_HEURMIX, XAER_RMERR, XAER_RMFAIL, |
| 376 | * XAER_NOTA, XAER_INVAL, or XAER_PROTO. |
| 377 | * |
| 378 | * If the transaction branch is already marked rollback-only the resource |
| 379 | * manager may throw one of the XA_RB* exceptions. |
| 380 | * |
| 381 | * Upon return, the resource manager has rolled back the branch's work and |
| 382 | * has released all held resources. |
| 383 | */ |
| 384 | public void rollback(Xid xid) throws XAException { |
| 385 | StringBuffer commandBuf = new StringBuffer(); |
| 386 | commandBuf.append("XA ROLLBACK "); |
| 387 | commandBuf.append(xidToString(xid)); |
| 388 | |
| 389 | try { |
| 390 | dispatchCommand(commandBuf.toString()); |
| 391 | } finally { |
| 392 | this.underlyingConnection.setInGlobalTx(false); |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | /** |
| 397 | * Ends the work performed on behalf of a transaction branch. |
| 398 | * |
| 399 | * The resource manager disassociates the XA resource from the transaction |
| 400 | * branch specified and lets the transaction complete. |
| 401 | * |
| 402 | * If TMSUSPEND is specified in the flags, the transaction branch is |
| 403 | * temporarily suspended in an incomplete state. The transaction context is |
| 404 | * in a suspended state and must be resumed via the start method with |
| 405 | * TMRESUME specified. |
| 406 | * |
| 407 | * If TMFAIL is specified, the portion of work has failed. The resource |
| 408 | * manager may mark the transaction as rollback-only |
| 409 | * |
| 410 | * If TMSUCCESS is specified, the portion of work has completed |
| 411 | * successfully. |
| 412 | * |
| 413 | * @parameter xid A global transaction identifier that is the same as the |
| 414 | * identifier used previously in the start method. |
| 415 | * |
| 416 | * @parameter flags One of TMSUCCESS, TMFAIL, or TMSUSPEND. |
| 417 | * |
| 418 | * @throws XAException - |
| 419 | * An error has occurred. Possible XAException values are |
| 420 | * XAER_RMERR, XAER_RMFAIL, XAER_NOTA, XAER_INVAL, XAER_PROTO, |
| 421 | * or XA_RB*. |
| 422 | */ |
| 423 | public void end(Xid xid, int flags) throws XAException { |
| 424 | StringBuffer commandBuf = new StringBuffer(); |
| 425 | commandBuf.append("XA END "); |
| 426 | commandBuf.append(xidToString(xid)); |
| 427 | |
| 428 | switch (flags) { |
| 429 | case TMSUCCESS: |
| 430 | break; // no-op |
| 431 | case TMSUSPEND: |
| 432 | commandBuf.append(" SUSPEND"); |
| 433 | break; |
| 434 | case TMFAIL: |
| 435 | break; // no-op |
| 436 | default: |
| 437 | throw new XAException(XAException.XAER_INVAL); |
| 438 | } |
| 439 | |
| 440 | dispatchCommand(commandBuf.toString()); |
| 441 | } |
| 442 | |
| 443 | /** |
| 444 | * Starts work on behalf of a transaction branch specified in xid. |
| 445 | * |
| 446 | * If TMJOIN is specified, the start applies to joining a transaction |
| 447 | * previously seen by the resource manager. |
| 448 | * |
| 449 | * If TMRESUME is specified, the start applies to resuming a suspended |
| 450 | * transaction specified in the parameter xid. |
| 451 | * |
| 452 | * If neither TMJOIN nor TMRESUME is specified and the transaction specified |
| 453 | * by xid has previously been seen by the resource manager, the resource |
| 454 | * manager throws the XAException exception with XAER_DUPID error code. |
| 455 | * |
| 456 | * @parameter xid A global transaction identifier to be associated with the |
| 457 | * resource. |
| 458 | * |
| 459 | * @parameter flags One of TMNOFLAGS, TMJOIN, or TMRESUME. |
| 460 | * |
| 461 | * @throws XAException |
| 462 | * An error has occurred. Possible exceptions are XA_RB*, |
| 463 | * XAER_RMERR, XAER_RMFAIL, XAER_DUPID, XAER_OUTSIDE, XAER_NOTA, |
| 464 | * XAER_INVAL, or XAER_PROTO. |
| 465 | */ |
| 466 | public void start(Xid xid, int flags) throws XAException { |
| 467 | StringBuffer commandBuf = new StringBuffer(); |
| 468 | commandBuf.append("XA START "); |
| 469 | commandBuf.append(xidToString(xid)); |
| 470 | |
| 471 | switch (flags) { |
| 472 | case TMJOIN: |
| 473 | commandBuf.append(" JOIN"); |
| 474 | break; |
| 475 | case TMRESUME: |
| 476 | commandBuf.append(" RESUME"); |
| 477 | break; |
| 478 | case TMNOFLAGS: |
| 479 | // no-op |
| 480 | break; |
| 481 | default: |
| 482 | throw new XAException(XAException.XAER_INVAL); |
| 483 | } |
| 484 | |
| 485 | dispatchCommand(commandBuf.toString()); |
| 486 | |
| 487 | this.underlyingConnection.setInGlobalTx(true); |
| 488 | } |
| 489 | |
| 490 | /** |
| 491 | * Commits the global transaction specified by xid. |
| 492 | * |
| 493 | * @parameter xid A global transaction identifier |
| 494 | * @parameter onePhase - If true, the resource manager should use a |
| 495 | * one-phase commit protocol to commit the work done on behalf of |
| 496 | * xid. |
| 497 | * |
| 498 | * @throws XAException |
| 499 | * An error has occurred. Possible XAExceptions are XA_HEURHAZ, |
| 500 | * XA_HEURCOM, XA_HEURRB, XA_HEURMIX, XAER_RMERR, XAER_RMFAIL, |
| 501 | * XAER_NOTA, XAER_INVAL, or XAER_PROTO. |
| 502 | * |
| 503 | * If the resource manager did not commit the transaction and the parameter |
| 504 | * onePhase is set to true, the resource manager may throw one of the XA_RB* |
| 505 | * exceptions. |
| 506 | * |
| 507 | * Upon return, the resource manager has rolled back the branch's work and |
| 508 | * has released all held resources. |
| 509 | */ |
| 510 | |
| 511 | public void commit(Xid xid, boolean onePhase) throws XAException { |
| 512 | StringBuffer commandBuf = new StringBuffer(); |
| 513 | commandBuf.append("XA COMMIT "); |
| 514 | commandBuf.append(xidToString(xid)); |
| 515 | |
| 516 | if (onePhase) { |
| 517 | commandBuf.append(" ONE PHASE"); |
| 518 | } |
| 519 | |
| 520 | try { |
| 521 | dispatchCommand(commandBuf.toString()); |
| 522 | } finally { |
| 523 | this.underlyingConnection.setInGlobalTx(false); |
| 524 | } |
| 525 | } |
| 526 | |
| 527 | private ResultSet dispatchCommand(String command) throws XAException { |
| 528 | Statement stmt = null; |
| 529 | |
| 530 | try { |
| 531 | if (this.log.isDebugEnabled()) { |
| 532 | this.log.logDebug("Executing XA statement: " + command); |
| 533 | } |
| 534 | |
| 535 | // TODO: Cache this for lifetime of XAConnection |
| 536 | stmt = this.underlyingConnection.createStatement(); |
| 537 | |
| 538 | |
| 539 | stmt.execute(command); |
| 540 | |
| 541 | ResultSet rs = stmt.getResultSet(); |
| 542 | |
| 543 | return rs; |
| 544 | } catch (SQLException sqlEx) { |
| 545 | throw mapXAExceptionFromSQLException(sqlEx); |
| 546 | } finally { |
| 547 | if (stmt != null) { |
| 548 | try { |
| 549 | stmt.close(); |
| 550 | } catch (SQLException sqlEx) { |
| 551 | } |
| 552 | } |
| 553 | } |
| 554 | } |
| 555 | |
| 556 | protected static XAException mapXAExceptionFromSQLException(SQLException sqlEx) { |
| 557 | |
| 558 | Integer xaCode = (Integer) MYSQL_ERROR_CODES_TO_XA_ERROR_CODES |
| 559 | .get(new Integer(sqlEx.getErrorCode())); |
| 560 | |
| 561 | if (xaCode != null) { |
| 562 | return new MysqlXAException(xaCode.intValue(), sqlEx.getMessage(), null); |
| 563 | } |
| 564 | |
| 565 | // Punt? We don't know what the error code is here |
| 566 | return new MysqlXAException(sqlEx.getMessage(), null); |
| 567 | } |
| 568 | |
| 569 | private static String xidToString(Xid xid) { |
| 570 | byte[] gtrid = xid.getGlobalTransactionId(); |
| 571 | |
| 572 | byte[] btrid = xid.getBranchQualifier(); |
| 573 | |
| 574 | int lengthAsString = 6; // for (0x and ,) * 2 |
| 575 | |
| 576 | if (gtrid != null) { |
| 577 | lengthAsString += (2 * gtrid.length); |
| 578 | } |
| 579 | |
| 580 | if (btrid != null) { |
| 581 | lengthAsString += (2 * btrid.length); |
| 582 | } |
| 583 | |
| 584 | String formatIdInHex = Integer.toHexString(xid.getFormatId()); |
| 585 | |
| 586 | lengthAsString += formatIdInHex.length(); |
| 587 | lengthAsString += 3; // for the '.' after formatId |
| 588 | |
| 589 | StringBuffer asString = new StringBuffer(lengthAsString); |
| 590 | |
| 591 | asString.append("0x"); |
| 592 | |
| 593 | if (gtrid != null) { |
| 594 | for (int i = 0; i < gtrid.length; i++) { |
| 595 | String asHex = Integer.toHexString(gtrid[i] & 0xff); |
| 596 | |
| 597 | if (asHex.length() == 1) { |
| 598 | asString.append("0"); |
| 599 | } |
| 600 | |
| 601 | asString.append(asHex); |
| 602 | } |
| 603 | } |
| 604 | |
| 605 | asString.append(","); |
| 606 | |
| 607 | if (btrid != null) { |
| 608 | asString.append("0x"); |
| 609 | |
| 610 | for (int i = 0; i < btrid.length; i++) { |
| 611 | String asHex = Integer.toHexString(btrid[i] & 0xff); |
| 612 | |
| 613 | if (asHex.length() == 1) { |
| 614 | asString.append("0"); |
| 615 | } |
| 616 | |
| 617 | asString.append(asHex); |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | asString.append(",0x"); |
| 622 | asString.append(formatIdInHex); |
| 623 | |
| 624 | return asString.toString(); |
| 625 | } |
| 626 | |
| 627 | /* |
| 628 | * (non-Javadoc) |
| 629 | * |
| 630 | * @see javax.sql.PooledConnection#getConnection() |
| 631 | */ |
| 632 | public synchronized Connection getConnection() throws SQLException { |
| 633 | Connection connToWrap = getConnection(false, true); |
| 634 | |
| 635 | return connToWrap; |
| 636 | } |
| 637 | } |