1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<!--NewPage--> 3<HTML> 4<HEAD> 5<!-- Generated by javadoc (build 1.5.0) on Thu May 15 17:17:33 EDT 2008 --> 6<TITLE> 7TransactionRunner (Oracle - Berkeley DB Java API) 8</TITLE> 9 10<META NAME="keywords" CONTENT="com.sleepycat.collections.TransactionRunner class"> 11 12<LINK REL ="stylesheet" TYPE="text/css" HREF="../../../style.css" TITLE="Style"> 13 14<SCRIPT type="text/javascript"> 15function windowTitle() 16{ 17 parent.document.title="TransactionRunner (Oracle - Berkeley DB Java API)"; 18} 19</SCRIPT> 20<NOSCRIPT> 21</NOSCRIPT> 22 23</HEAD> 24 25<BODY BGCOLOR="white" onload="windowTitle();"> 26 27 28<!-- ========= START OF TOP NAVBAR ======= --> 29<A NAME="navbar_top"><!-- --></A> 30<A HREF="#skip-navbar_top" title="Skip navigation links"></A> 31<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> 32<TR> 33<TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> 34<A NAME="navbar_top_firstrow"><!-- --></A> 35<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> 36 <TR ALIGN="center" VALIGN="top"> 37 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> 38 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> 39 <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> 40 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/TransactionRunner.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> 41 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> 42 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> 43 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> 44 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> 45 </TR> 46</TABLE> 47</TD> 48<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> 49<b>Berkeley DB</b><br><font size="-1"> version 4.7.25</font></EM> 50</TD> 51</TR> 52 53<TR> 54<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 55 <A HREF="../../../com/sleepycat/collections/StoredValueSet.html" title="class in com.sleepycat.collections"><B>PREV CLASS</B></A> 56 <A HREF="../../../com/sleepycat/collections/TransactionWorker.html" title="interface in com.sleepycat.collections"><B>NEXT CLASS</B></A></FONT></TD> 57<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 58 <A HREF="../../../index.html?com/sleepycat/collections/TransactionRunner.html" target="_top"><B>FRAMES</B></A> 59 <A HREF="TransactionRunner.html" target="_top"><B>NO FRAMES</B></A> 60 <SCRIPT type="text/javascript"> 61 <!-- 62 if(window==top) { 63 document.writeln('<A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A>'); 64 } 65 //--> 66</SCRIPT> 67<NOSCRIPT> 68 <A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A> 69</NOSCRIPT> 70 71 72</FONT></TD> 73</TR> 74<TR> 75<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 76 SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD> 77<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 78DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD> 79</TR> 80</TABLE> 81<A NAME="skip-navbar_top"></A> 82<!-- ========= END OF TOP NAVBAR ========= --> 83 84<HR> 85<!-- ======== START OF CLASS DATA ======== --> 86<H2> 87<FONT SIZE="-1"> 88com.sleepycat.collections</FONT> 89<BR> 90Class TransactionRunner</H2> 91<PRE> 92<A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html" title="class or interface in java.lang">java.lang.Object</A> 93 <IMG SRC="../../../resources/inherit.gif" ALT="extended by "><B>com.sleepycat.collections.TransactionRunner</B> 94</PRE> 95<HR> 96<DL> 97<DT><PRE>public class <B>TransactionRunner</B><DT>extends <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></DL> 98</PRE> 99 100<P> 101Starts a transaction, calls <A HREF="../../../com/sleepycat/collections/TransactionWorker.html#doWork()"><CODE>TransactionWorker.doWork()</CODE></A>, and handles 102 transaction retry and exceptions. To perform a transaction, the user 103 implements the <A HREF="../../../com/sleepycat/collections/TransactionWorker.html" title="interface in com.sleepycat.collections"><CODE>TransactionWorker</CODE></A> interface and passes an instance of 104 that class to the <A HREF="../../../com/sleepycat/collections/TransactionRunner.html#run(com.sleepycat.collections.TransactionWorker)"><CODE>run(com.sleepycat.collections.TransactionWorker)</CODE></A> method. 105 106 <p>A single TransactionRunner instance may be used by any number of threads 107 for any number of transactions.</p> 108 109 <p>The behavior of the run() method depends on whether the environment is 110 transactional, whether nested transactions are enabled, and whether a 111 transaction is already active.</p> 112 113 <ul> 114 <li>When the run() method is called in a transactional environment and no 115 transaction is active for the current thread, a new transaction is started 116 before calling doWork(). If DeadlockException is thrown by doWork(), the 117 transaction will be aborted and the process will be repeated up to the 118 maximum number of retries. If another exception is thrown by doWork() or 119 the maximum number of retries has occurred, the transaction will be aborted 120 and the exception will be rethrown by the run() method. If no exception is 121 thrown by doWork(), the transaction will be committed. The run() method 122 will not attempt to commit or abort a transaction if it has already been 123 committed or aborted by doWork().</li> 124 125 <li>When the run() method is called and a transaction is active for the 126 current thread, and nested transactions are enabled, a nested transaction is 127 started before calling doWork(). The transaction that is active when 128 calling the run() method will become the parent of the nested transaction. 129 The nested transaction will be committed or aborted by the run() method 130 following the same rules described above. Note that nested transactions may 131 not be enabled for the JE product, since JE does not support nested 132 transactions.</li> 133 134 <li>When the run() method is called in a non-transactional environment, the 135 doWork() method is called without starting a transaction. The run() method 136 will return without committing or aborting a transaction, and any exceptions 137 thrown by the doWork() method will be thrown by the run() method.</li> 138 139 <li>When the run() method is called and a transaction is active for the 140 current thread and nested transactions are not enabled (the default) the 141 same rules as above apply. All the operations performed by the doWork() 142 method will be part of the currently active transaction.</li> 143 </ul> 144 145 <p>In a transactional environment, the rules described above support nested 146 calls to the run() method and guarantee that the outermost call will cause 147 the transaction to be committed or aborted. This is true whether or not 148 nested transactions are supported or enabled. Note that nested transactions 149 are provided as an optimization for improving concurrency but do not change 150 the meaning of the outermost transaction. Nested transactions are not 151 currently supported by the JE product.</p> 152<P> 153 154<P> 155<HR> 156 157<P> 158<!-- =========== FIELD SUMMARY =========== --> 159 160<A NAME="field_summary"><!-- --></A> 161<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 162<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 163<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> 164<B>Field Summary</B></FONT></TH> 165</TR> 166<TR BGCOLOR="white" CLASS="TableRowColor"> 167<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 168<CODE>static int</CODE></FONT></TD> 169<TD><CODE><B><A HREF="../../../com/sleepycat/collections/TransactionRunner.html#DEFAULT_MAX_RETRIES">DEFAULT_MAX_RETRIES</A></B></CODE> 170 171<BR> 172 The default maximum number of retries.</TD> 173</TR> 174</TABLE> 175 176<!-- ======== CONSTRUCTOR SUMMARY ======== --> 177 178<A NAME="constructor_summary"><!-- --></A> 179<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 180<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 181<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> 182<B>Constructor Summary</B></FONT></TH> 183</TR> 184<TR BGCOLOR="white" CLASS="TableRowColor"> 185<TD><CODE><B><A HREF="../../../com/sleepycat/collections/TransactionRunner.html#TransactionRunner(com.sleepycat.db.Environment)">TransactionRunner</A></B>(<A HREF="../../../com/sleepycat/db/Environment.html" title="class in com.sleepycat.db">Environment</A> env)</CODE> 186 187<BR> 188 Creates a transaction runner for a given Berkeley DB environment.</TD> 189</TR> 190<TR BGCOLOR="white" CLASS="TableRowColor"> 191<TD><CODE><B><A HREF="../../../com/sleepycat/collections/TransactionRunner.html#TransactionRunner(com.sleepycat.db.Environment, int, com.sleepycat.db.TransactionConfig)">TransactionRunner</A></B>(<A HREF="../../../com/sleepycat/db/Environment.html" title="class in com.sleepycat.db">Environment</A> env, 192 int maxRetries, 193 <A HREF="../../../com/sleepycat/db/TransactionConfig.html" title="class in com.sleepycat.db">TransactionConfig</A> config)</CODE> 194 195<BR> 196 Creates a transaction runner for a given Berkeley DB environment and 197 with a given number of maximum retries.</TD> 198</TR> 199</TABLE> 200 201<!-- ========== METHOD SUMMARY =========== --> 202 203<A NAME="method_summary"><!-- --></A> 204<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 205<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 206<TH ALIGN="left" COLSPAN="2"><FONT SIZE="+2"> 207<B>Method Summary</B></FONT></TH> 208</TR> 209<TR BGCOLOR="white" CLASS="TableRowColor"> 210<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 211<CODE> boolean</CODE></FONT></TD> 212<TD><CODE><B><A HREF="../../../com/sleepycat/collections/TransactionRunner.html#getAllowNestedTransactions()">getAllowNestedTransactions</A></B>()</CODE> 213 214<BR> 215 Returns whether nested transactions will be created if 216 <code>run()</code> is called when a transaction is already active for 217 the current thread.</TD> 218</TR> 219<TR BGCOLOR="white" CLASS="TableRowColor"> 220<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 221<CODE> int</CODE></FONT></TD> 222<TD><CODE><B><A HREF="../../../com/sleepycat/collections/TransactionRunner.html#getMaxRetries()">getMaxRetries</A></B>()</CODE> 223 224<BR> 225 Returns the maximum number of retries that will be performed when 226 deadlocks are detected.</TD> 227</TR> 228<TR BGCOLOR="white" CLASS="TableRowColor"> 229<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 230<CODE> <A HREF="../../../com/sleepycat/db/TransactionConfig.html" title="class in com.sleepycat.db">TransactionConfig</A></CODE></FONT></TD> 231<TD><CODE><B><A HREF="../../../com/sleepycat/collections/TransactionRunner.html#getTransactionConfig()">getTransactionConfig</A></B>()</CODE> 232 233<BR> 234 Returns the transaction configuration used for calling 235 <A HREF="../../../com/sleepycat/db/Environment.html#beginTransaction(com.sleepycat.db.Transaction, com.sleepycat.db.TransactionConfig)"><CODE>Environment.beginTransaction(com.sleepycat.db.Transaction, com.sleepycat.db.TransactionConfig)</CODE></A>.</TD> 236</TR> 237<TR BGCOLOR="white" CLASS="TableRowColor"> 238<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 239<CODE> void</CODE></FONT></TD> 240<TD><CODE><B><A HREF="../../../com/sleepycat/collections/TransactionRunner.html#run(com.sleepycat.collections.TransactionWorker)">run</A></B>(<A HREF="../../../com/sleepycat/collections/TransactionWorker.html" title="interface in com.sleepycat.collections">TransactionWorker</A> worker)</CODE> 241 242<BR> 243 Calls the <A HREF="../../../com/sleepycat/collections/TransactionWorker.html#doWork()"><CODE>TransactionWorker.doWork()</CODE></A> method and, for transactional 244 environments, may begin and end a transaction.</TD> 245</TR> 246<TR BGCOLOR="white" CLASS="TableRowColor"> 247<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 248<CODE> void</CODE></FONT></TD> 249<TD><CODE><B><A HREF="../../../com/sleepycat/collections/TransactionRunner.html#setAllowNestedTransactions(boolean)">setAllowNestedTransactions</A></B>(boolean allowNestedTxn)</CODE> 250 251<BR> 252 Changes whether nested transactions will be created if 253 <code>run()</code> is called when a transaction is already active for 254 the current thread.</TD> 255</TR> 256<TR BGCOLOR="white" CLASS="TableRowColor"> 257<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 258<CODE> void</CODE></FONT></TD> 259<TD><CODE><B><A HREF="../../../com/sleepycat/collections/TransactionRunner.html#setMaxRetries(int)">setMaxRetries</A></B>(int maxRetries)</CODE> 260 261<BR> 262 Changes the maximum number of retries that will be performed when 263 deadlocks are detected.</TD> 264</TR> 265<TR BGCOLOR="white" CLASS="TableRowColor"> 266<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"> 267<CODE> void</CODE></FONT></TD> 268<TD><CODE><B><A HREF="../../../com/sleepycat/collections/TransactionRunner.html#setTransactionConfig(com.sleepycat.db.TransactionConfig)">setTransactionConfig</A></B>(<A HREF="../../../com/sleepycat/db/TransactionConfig.html" title="class in com.sleepycat.db">TransactionConfig</A> config)</CODE> 269 270<BR> 271 Changes the transaction configuration used for calling 272 <A HREF="../../../com/sleepycat/db/Environment.html#beginTransaction(com.sleepycat.db.Transaction, com.sleepycat.db.TransactionConfig)"><CODE>Environment.beginTransaction(com.sleepycat.db.Transaction, com.sleepycat.db.TransactionConfig)</CODE></A>.</TD> 273</TR> 274</TABLE> 275 <A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A> 276<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 277<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"> 278<TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html" title="class or interface in java.lang">Object</A></B></TH> 279</TR> 280<TR BGCOLOR="white" CLASS="TableRowColor"> 281<TD><CODE><A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Object.html#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD> 282</TR> 283</TABLE> 284 285<P> 286 287<!-- ============ FIELD DETAIL =========== --> 288 289<A NAME="field_detail"><!-- --></A> 290<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 291<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 292<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> 293<B>Field Detail</B></FONT></TH> 294</TR> 295</TABLE> 296 297<A NAME="DEFAULT_MAX_RETRIES"><!-- --></A><H3> 298DEFAULT_MAX_RETRIES</H3> 299<PRE> 300public static final int <B>DEFAULT_MAX_RETRIES</B></PRE> 301<DL> 302<DD>The default maximum number of retries. 303<P> 304<DL> 305<DT><B>See Also:</B><DD><A HREF="../../../constant-values.html#com.sleepycat.collections.TransactionRunner.DEFAULT_MAX_RETRIES">Constant Field Values</A></DL> 306</DL> 307 308<!-- ========= CONSTRUCTOR DETAIL ======== --> 309 310<A NAME="constructor_detail"><!-- --></A> 311<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 312<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 313<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> 314<B>Constructor Detail</B></FONT></TH> 315</TR> 316</TABLE> 317 318<A NAME="TransactionRunner(com.sleepycat.db.Environment)"><!-- --></A><H3> 319TransactionRunner</H3> 320<PRE> 321public <B>TransactionRunner</B>(<A HREF="../../../com/sleepycat/db/Environment.html" title="class in com.sleepycat.db">Environment</A> env)</PRE> 322<DL> 323<DD>Creates a transaction runner for a given Berkeley DB environment. 324 The default maximum number of retries (<A HREF="../../../com/sleepycat/collections/TransactionRunner.html#DEFAULT_MAX_RETRIES"><CODE>DEFAULT_MAX_RETRIES</CODE></A>) and 325 a null (default) <A HREF="../../../com/sleepycat/db/TransactionConfig.html" title="class in com.sleepycat.db"><CODE>TransactionConfig</CODE></A> will be used. 326<P> 327<DL> 328<DT><B>Parameters:</B><DD><CODE>env</CODE> - is the environment for running transactions.</DL> 329</DL> 330<HR> 331 332<A NAME="TransactionRunner(com.sleepycat.db.Environment, int, com.sleepycat.db.TransactionConfig)"><!-- --></A><H3> 333TransactionRunner</H3> 334<PRE> 335public <B>TransactionRunner</B>(<A HREF="../../../com/sleepycat/db/Environment.html" title="class in com.sleepycat.db">Environment</A> env, 336 int maxRetries, 337 <A HREF="../../../com/sleepycat/db/TransactionConfig.html" title="class in com.sleepycat.db">TransactionConfig</A> config)</PRE> 338<DL> 339<DD>Creates a transaction runner for a given Berkeley DB environment and 340 with a given number of maximum retries. 341<P> 342<DL> 343<DT><B>Parameters:</B><DD><CODE>env</CODE> - is the environment for running transactions.<DD><CODE>maxRetries</CODE> - is the maximum number of retries that will be 344 performed when deadlocks are detected.<DD><CODE>config</CODE> - the transaction configuration used for calling 345 <A HREF="../../../com/sleepycat/db/Environment.html#beginTransaction(com.sleepycat.db.Transaction, com.sleepycat.db.TransactionConfig)"><CODE>Environment.beginTransaction(com.sleepycat.db.Transaction, com.sleepycat.db.TransactionConfig)</CODE></A>, or null to use the default 346 configuration. The configuration object is not cloned, and 347 any modifications to it will impact subsequent transactions.</DL> 348</DL> 349 350<!-- ============ METHOD DETAIL ========== --> 351 352<A NAME="method_detail"><!-- --></A> 353<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY=""> 354<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"> 355<TH ALIGN="left" COLSPAN="1"><FONT SIZE="+2"> 356<B>Method Detail</B></FONT></TH> 357</TR> 358</TABLE> 359 360<A NAME="getMaxRetries()"><!-- --></A><H3> 361getMaxRetries</H3> 362<PRE> 363public int <B>getMaxRetries</B>()</PRE> 364<DL> 365<DD>Returns the maximum number of retries that will be performed when 366 deadlocks are detected. 367<P> 368<DD><DL> 369</DL> 370</DD> 371</DL> 372<HR> 373 374<A NAME="setMaxRetries(int)"><!-- --></A><H3> 375setMaxRetries</H3> 376<PRE> 377public void <B>setMaxRetries</B>(int maxRetries)</PRE> 378<DL> 379<DD>Changes the maximum number of retries that will be performed when 380 deadlocks are detected. 381 Calling this method does not impact transactions already running. 382<P> 383<DD><DL> 384</DL> 385</DD> 386</DL> 387<HR> 388 389<A NAME="getAllowNestedTransactions()"><!-- --></A><H3> 390getAllowNestedTransactions</H3> 391<PRE> 392public boolean <B>getAllowNestedTransactions</B>()</PRE> 393<DL> 394<DD>Returns whether nested transactions will be created if 395 <code>run()</code> is called when a transaction is already active for 396 the current thread. 397 By default this property is false. 398 399 <p>Note that this method always returns false in the JE product, since 400 nested transactions are not supported by JE.</p> 401<P> 402<DD><DL> 403</DL> 404</DD> 405</DL> 406<HR> 407 408<A NAME="setAllowNestedTransactions(boolean)"><!-- --></A><H3> 409setAllowNestedTransactions</H3> 410<PRE> 411public void <B>setAllowNestedTransactions</B>(boolean allowNestedTxn)</PRE> 412<DL> 413<DD>Changes whether nested transactions will be created if 414 <code>run()</code> is called when a transaction is already active for 415 the current thread. 416 Calling this method does not impact transactions already running. 417 418 <p>Note that true may not be passed to this method in the JE product, 419 since nested transactions are not supported by JE.</p> 420<P> 421<DD><DL> 422</DL> 423</DD> 424</DL> 425<HR> 426 427<A NAME="getTransactionConfig()"><!-- --></A><H3> 428getTransactionConfig</H3> 429<PRE> 430public <A HREF="../../../com/sleepycat/db/TransactionConfig.html" title="class in com.sleepycat.db">TransactionConfig</A> <B>getTransactionConfig</B>()</PRE> 431<DL> 432<DD>Returns the transaction configuration used for calling 433 <A HREF="../../../com/sleepycat/db/Environment.html#beginTransaction(com.sleepycat.db.Transaction, com.sleepycat.db.TransactionConfig)"><CODE>Environment.beginTransaction(com.sleepycat.db.Transaction, com.sleepycat.db.TransactionConfig)</CODE></A>. 434 435 <p>If this property is null, the default configuration is used. The 436 configuration object is not cloned, and any modifications to it will 437 impact subsequent transactions.</p> 438<P> 439<DD><DL> 440 441<DT><B>Returns:</B><DD>the transaction configuration.</DL> 442</DD> 443</DL> 444<HR> 445 446<A NAME="setTransactionConfig(com.sleepycat.db.TransactionConfig)"><!-- --></A><H3> 447setTransactionConfig</H3> 448<PRE> 449public void <B>setTransactionConfig</B>(<A HREF="../../../com/sleepycat/db/TransactionConfig.html" title="class in com.sleepycat.db">TransactionConfig</A> config)</PRE> 450<DL> 451<DD>Changes the transaction configuration used for calling 452 <A HREF="../../../com/sleepycat/db/Environment.html#beginTransaction(com.sleepycat.db.Transaction, com.sleepycat.db.TransactionConfig)"><CODE>Environment.beginTransaction(com.sleepycat.db.Transaction, com.sleepycat.db.TransactionConfig)</CODE></A>. 453 454 <p>If this property is null, the default configuration is used. The 455 configuration object is not cloned, and any modifications to it will 456 impact subsequent transactions.</p> 457<P> 458<DD><DL> 459<DT><B>Parameters:</B><DD><CODE>config</CODE> - the transaction configuration.</DL> 460</DD> 461</DL> 462<HR> 463 464<A NAME="run(com.sleepycat.collections.TransactionWorker)"><!-- --></A><H3> 465run</H3> 466<PRE> 467public void <B>run</B>(<A HREF="../../../com/sleepycat/collections/TransactionWorker.html" title="interface in com.sleepycat.collections">TransactionWorker</A> worker) 468 throws <A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A>, 469 <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Exception.html" title="class or interface in java.lang">Exception</A></PRE> 470<DL> 471<DD>Calls the <A HREF="../../../com/sleepycat/collections/TransactionWorker.html#doWork()"><CODE>TransactionWorker.doWork()</CODE></A> method and, for transactional 472 environments, may begin and end a transaction. If the environment given 473 is non-transactional, a transaction will not be used but the doWork() 474 method will still be called. See the class description for more 475 information. 476<P> 477<DD><DL> 478 479<DT><B>Throws:</B> 480<DD><CODE><A HREF="../../../com/sleepycat/db/DeadlockException.html" title="class in com.sleepycat.db">DeadlockException</A></CODE> - when it is thrown by doWork() and the 481 maximum number of retries has occurred. The transaction will have been 482 aborted by this method. 483<DD><CODE><A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/Exception.html" title="class or interface in java.lang">Exception</A></CODE> - when any other exception is thrown by doWork(). The 484 exception will first be unwrapped by calling <A HREF="../../../com/sleepycat/util/ExceptionUnwrapper.html#unwrap(java.lang.Exception)"><CODE>ExceptionUnwrapper.unwrap(java.lang.Exception)</CODE></A>. The transaction will have been aborted by 485 this method. 486<DD><CODE><A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></CODE></DL> 487</DD> 488</DL> 489<!-- ========= END OF CLASS DATA ========= --> 490<HR> 491 492 493<!-- ======= START OF BOTTOM NAVBAR ====== --> 494<A NAME="navbar_bottom"><!-- --></A> 495<A HREF="#skip-navbar_bottom" title="Skip navigation links"></A> 496<TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0" SUMMARY=""> 497<TR> 498<TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> 499<A NAME="navbar_bottom_firstrow"><!-- --></A> 500<TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3" SUMMARY=""> 501 <TR ALIGN="center" VALIGN="top"> 502 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> 503 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> 504 <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> 505 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/TransactionRunner.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> 506 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> 507 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> 508 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> 509 <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> 510 </TR> 511</TABLE> 512</TD> 513<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM> 514<b>Berkeley DB</b><br><font size="-1"> version 4.7.25</font></EM> 515</TD> 516</TR> 517 518<TR> 519<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 520 <A HREF="../../../com/sleepycat/collections/StoredValueSet.html" title="class in com.sleepycat.collections"><B>PREV CLASS</B></A> 521 <A HREF="../../../com/sleepycat/collections/TransactionWorker.html" title="interface in com.sleepycat.collections"><B>NEXT CLASS</B></A></FONT></TD> 522<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> 523 <A HREF="../../../index.html?com/sleepycat/collections/TransactionRunner.html" target="_top"><B>FRAMES</B></A> 524 <A HREF="TransactionRunner.html" target="_top"><B>NO FRAMES</B></A> 525 <SCRIPT type="text/javascript"> 526 <!-- 527 if(window==top) { 528 document.writeln('<A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A>'); 529 } 530 //--> 531</SCRIPT> 532<NOSCRIPT> 533 <A HREF="../../../allclasses-noframe.html"><B>All Classes</B></A> 534</NOSCRIPT> 535 536 537</FONT></TD> 538</TR> 539<TR> 540<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 541 SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD> 542<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> 543DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD> 544</TR> 545</TABLE> 546<A NAME="skip-navbar_bottom"></A> 547<!-- ======== END OF BOTTOM NAVBAR ======= --> 548 549<HR> 550<font size=1>Copyright (c) 1996,2008 Oracle. 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