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BackupHandler (Oracle - Berkeley DB Java API)
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<b>Berkeley DB</b><br><font size="-1"> version 5.3.21</font></EM>
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com.sleepycat.db</FONT>
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Interface BackupHandler</H2>
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<DT><PRE>public interface <B>BackupHandler</B></DL>
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<P>
An interface that can optionally be used to override the default behavior
performed by the
<A HREF="../../../com/sleepycat/db/Environment.html#backup(java.lang.String, com.sleepycat.db.BackupOptions)"><CODE>Environment.backup</CODE></A>
and
<A HREF="../../../com/sleepycat/db/Environment.html#backupDatabase(java.lang.String, java.lang.String, boolean)"><CODE>Environment.backupDatabase</CODE></A>
methods. Implementation of this interface is required if the
Environment.backup or Environment.backupDatabase target parameter is null.
<p>
You configure the environment with this handler using the
<A HREF="../../../com/sleepycat/db/EnvironmentConfig.html#setBackupHandler(com.sleepycat.db.BackupHandler)"><CODE>EnvironmentConfig.setBackupHandler</CODE></A>
method.
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/BackupHandler.html#close(java.lang.String)">close</A></B>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> dbname)</CODE>
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Called when ending a backup and closing a backup target.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/BackupHandler.html#open(java.lang.String, java.lang.String)">open</A></B>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> target,
<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> dbname)</CODE>
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Called when a target location is opened during a backup.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/BackupHandler.html#write(long, byte[], int, int)">write</A></B>(long file_pos,
byte[] buf,
int off,
int len)</CODE>
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Called when writing data during a backup.</TD>
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<A NAME="close(java.lang.String)"><!-- --></A><H3>
close</H3>
<PRE>
int <B>close</B>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> dbname)</PRE>
<DL>
<DD>Called when ending a backup and closing a backup target.
<p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>dbname</CODE> - The name of the database that has been backed up.</DL>
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<A NAME="open(java.lang.String, java.lang.String)"><!-- --></A><H3>
open</H3>
<PRE>
int <B>open</B>(<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> target,
<A HREF="http://download.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> dbname)</PRE>
<DL>
<DD>Called when a target location is opened during a backup. This method
should do whatever is necessary to prepare the backup destination for
writing the data.
<p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>target</CODE> - The backup's directory destination.
<p><DD><CODE>dbname</CODE> - The name of the database being backed up.</DL>
</DD>
</DL>
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<A NAME="write(long, byte[], int, int)"><!-- --></A><H3>
write</H3>
<PRE>
int <B>write</B>(long file_pos,
byte[] buf,
int off,
int len)</PRE>
<DL>
<DD>Called when writing data during a backup.
<p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>file_pos</CODE> - Identifies the position in the target file where the bytes
from the buffer should be written.
<p><DD><CODE>buf</CODE> - Identifies the buffer which contains the data to be backed up.
<p><DD><CODE>off</CODE> - Specifies the start of the data in the buffer. This will always be
zero.
<p><DD><CODE>len</CODE> - Identifies the number of bytes to back up from the buffer.</DL>
</DD>
</DL>
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