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CurrentTransaction (Oracle - Berkeley DB Java API)
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com.sleepycat.collections
 
Class CurrentTransaction</H2>
<PRE>
<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>
 <IMG SRC="../../../resources/inherit.gif" ALT="extended by ">com.sleepycat.collections.CurrentTransaction
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<DL>
<DT><PRE>public class CurrentTransaction<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>
</PRE>

Provides access to the current transaction for the current thread within the
 context of a Berkeley DB environment. This class provides explicit
 transaction control beyond that provided by the <A HREF="../../../com/sleepycat/collections/TransactionRunner.html" title="class in com.sleepycat.collections"><CODE>TransactionRunner</CODE></A>
 class. However, both methods of transaction control manage per-thread
 transactions.

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Method Summary</TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>&nbsp;<A HREF="../../../com/sleepycat/db/Transaction.html" title="class in com.sleepycat.db">Transaction</A></CODE></TD>
<TD><CODE><A HREF="../../../com/sleepycat/collections/CurrentTransaction.html#abortTransaction()">abortTransaction</A>()</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Aborts the transaction that is active for the current thread for this
 environment and makes the parent transaction (if any) the current
 transaction.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>&nbsp;<A HREF="../../../com/sleepycat/db/Transaction.html" title="class in com.sleepycat.db">Transaction</A></CODE></TD>
<TD><CODE><A HREF="../../../com/sleepycat/collections/CurrentTransaction.html#beginTransaction(com.sleepycat.db.TransactionConfig)">beginTransaction</A>(<A HREF="../../../com/sleepycat/db/TransactionConfig.html" title="class in com.sleepycat.db">TransactionConfig</A>&nbsp;config)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Begins a new transaction for this environment and associates it with
 the current thread.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>&nbsp;<A HREF="../../../com/sleepycat/db/Transaction.html" title="class in com.sleepycat.db">Transaction</A></CODE></TD>
<TD><CODE><A HREF="../../../com/sleepycat/collections/CurrentTransaction.html#commitTransaction()">commitTransaction</A>()</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Commits the transaction that is active for the current thread for this
 environment and makes the parent transaction (if any) the current
 transaction.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<CODE>&nbsp;<A HREF="../../../com/sleepycat/db/Environment.html" title="class in com.sleepycat.db">Environment</A></CODE></TD>
<TD><CODE><A HREF="../../../com/sleepycat/collections/CurrentTransaction.html#getEnvironment()">getEnvironment</A>()</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the underlying Berkeley DB environment.</TD>
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<CODE>static&nbsp;<A HREF="../../../com/sleepycat/collections/CurrentTransaction.html" title="class in com.sleepycat.collections">CurrentTransaction</A></CODE></TD>
<TD><CODE><A HREF="../../../com/sleepycat/collections/CurrentTransaction.html#getInstance(com.sleepycat.db.Environment)">getInstance</A>(<A HREF="../../../com/sleepycat/db/Environment.html" title="class in com.sleepycat.db">Environment</A>&nbsp;env)</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Gets the CurrentTransaction accessor for a specified Berkeley DB
 environment.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%">
<CODE>&nbsp;<A HREF="../../../com/sleepycat/db/Transaction.html" title="class in com.sleepycat.db">Transaction</A></CODE></TD>
<TD><CODE><A HREF="../../../com/sleepycat/collections/CurrentTransaction.html#getTransaction()">getTransaction</A>()</CODE>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the transaction associated with the current thread for this
 environment, or null if no transaction is active.</TD>
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<A NAME="getInstance(com.sleepycat.db.Environment)"></A><H3>
getInstance</H3>
<PRE>
public static <A HREF="../../../com/sleepycat/collections/CurrentTransaction.html" title="class in com.sleepycat.collections">CurrentTransaction</A> getInstance(<A HREF="../../../com/sleepycat/db/Environment.html" title="class in com.sleepycat.db">Environment</A>&nbsp;env)</PRE>
<DL>
<DD>Gets the CurrentTransaction accessor for a specified Berkeley DB
 environment. This method always returns the same reference when called
 more than once with the same environment parameter.

<DD><DL>
<DT>Parameters:<DD><CODE>env</CODE> - is an open Berkeley DB environment.
<DT>Returns:<DD>the CurrentTransaction accessor for the given environment, or
 null if the environment is not transactional.</DL>
</DD>
</DL>
<HR>

<A NAME="getEnvironment()"></A><H3>
getEnvironment</H3>
<PRE>
public final <A HREF="../../../com/sleepycat/db/Environment.html" title="class in com.sleepycat.db">Environment</A> getEnvironment()</PRE>
<DL>
<DD>Returns the underlying Berkeley DB environment.

<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="getTransaction()"></A><H3>
getTransaction</H3>
<PRE>
public final <A HREF="../../../com/sleepycat/db/Transaction.html" title="class in com.sleepycat.db">Transaction</A> getTransaction()</PRE>
<DL>
<DD>Returns the transaction associated with the current thread for this
 environment, or null if no transaction is active.

<DD><DL>
</DL>
</DD>
</DL>
<HR>

<A NAME="beginTransaction(com.sleepycat.db.TransactionConfig)"></A><H3>
beginTransaction</H3>
<PRE>
public final <A HREF="../../../com/sleepycat/db/Transaction.html" title="class in com.sleepycat.db">Transaction</A> beginTransaction(<A HREF="../../../com/sleepycat/db/TransactionConfig.html" title="class in com.sleepycat.db">TransactionConfig</A>&nbsp;config)
 throws <A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></PRE>
<DL>
<DD>Begins a new transaction for this environment and associates it with
 the current thread. If a transaction is already active for this
 environment and thread, a nested transaction will be created.

<DD><DL>
<DT>Parameters:<DD><CODE>config</CODE> - the transaction configuration used for calling
 <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
 configuration.
<DT>Returns:<DD>the new transaction.
<DT>Throws:
<DD><CODE><A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></CODE> - if the transaction cannot be started, in which
 case any existing transaction is not affected.
<DD><CODE><A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/IllegalStateException.html" title="class or interface in java.lang">IllegalStateException</A></CODE> - if a transaction is already active and
 nested transactions are not supported by the environment.</DL>
</DD>
</DL>
<HR>

<A NAME="commitTransaction()"></A><H3>
commitTransaction</H3>
<PRE>
public final <A HREF="../../../com/sleepycat/db/Transaction.html" title="class in com.sleepycat.db">Transaction</A> commitTransaction()
 throws <A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A>,
 <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/IllegalStateException.html" title="class or interface in java.lang">IllegalStateException</A></PRE>
<DL>
<DD>Commits the transaction that is active for the current thread for this
 environment and makes the parent transaction (if any) the current
 transaction.

<DD><DL>

<DT>Returns:<DD>the parent transaction or null if the committed transaction was
 not nested.
<DT>Throws:
<DD><CODE><A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></CODE> - if an error occurs committing the transaction.
 The transaction will still be closed and the parent transaction will
 become the current transaction.
<DD><CODE><A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/IllegalStateException.html" title="class or interface in java.lang">IllegalStateException</A></CODE> - if no transaction is active for the
 current thread for this environment.</DL>
</DD>
</DL>
<HR>

<A NAME="abortTransaction()"></A><H3>
abortTransaction</H3>
<PRE>
public final <A HREF="../../../com/sleepycat/db/Transaction.html" title="class in com.sleepycat.db">Transaction</A> abortTransaction()
 throws <A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A>,
 <A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/IllegalStateException.html" title="class or interface in java.lang">IllegalStateException</A></PRE>
<DL>
<DD>Aborts the transaction that is active for the current thread for this
 environment and makes the parent transaction (if any) the current
 transaction.

<DD><DL>

<DT>Returns:<DD>the parent transaction or null if the aborted transaction was
 not nested.
<DT>Throws:
<DD><CODE><A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></CODE> - if an error occurs aborting the transaction.
 The transaction will still be closed and the parent transaction will
 become the current transaction.
<DD><CODE><A HREF="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/IllegalStateException.html" title="class or interface in java.lang">IllegalStateException</A></CODE> - if no transaction is active for the
 current thread for this environment.</DL>
</DD>
</DL>

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