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: Class Session
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jora</FONT>
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Class Session</H2>
<PRE>
java.lang.Object
|
+--<B>jora.Session</B>
</PRE>
<HR>
<DL>
<DT>public class <B>Session</B><DT>extends java.lang.Object</DL>
<P>
This class is reposnsible for establishing connection with database and handling database errors.
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<CODE> java.sql.Connection</CODE></FONT></TD>
<TD><CODE><B><A HREF="../jora/Session.html#connection">connection</A></B></CODE>
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<TD><CODE><B><A HREF="../jora/Session.html#Session()">Session</A></B>()</CODE>
<BR>
Session consructor for ODBC bridge driver</TD>
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<TD><CODE><B><A HREF="../jora/Session.html#Session(java.lang.String)">Session</A></B>(java.lang.String driverClass)</CODE>
<BR>
Session consructor</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../jora/Session.html#close()">close</A></B>()</CODE>
<BR>
Close database session and release all resources holded by session.</TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../jora/Session.html#commit()">commit</A></B>()</CODE>
<BR>
Commit makes all changes made since the previous commit/rollback permanent and releases any database locks currently held by the Connection. </TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../jora/Session.html#execute(java.lang.String)">execute</A></B>(java.lang.String sql)</CODE>
<BR>
Execute a SQL INSERT, UPDATE or DELETE statement. </TD>
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../jora/Session.html#handleSQLException(java.sql.SQLException)">handleSQLException</A></B>(java.sql.SQLException ex)</CODE>
<BR>
Handler of database session errors. </TD>
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<CODE> boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../jora/Session.html#open(java.lang.String, java.lang.String, java.lang.String)">open</A></B>(java.lang.String dataSource, java.lang.String user, java.lang.String password)</CODE>
<BR>
Open database session. </TD>
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<TR BGCOLOR="white" ID="TableRowColor">
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<CODE> void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../jora/Session.html#rollback()">rollback</A></B>()</CODE>
<BR>
Rollback drops all changes made since the previous commit/rollback and releases any database locks currently held by the Connection. </TD>
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<TD><CODE>equals,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait</CODE></TD>
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<A NAME="connection"><!-- --></A><H3>
connection</H3>
<PRE>
public java.sql.Connection <B>connection</B></PRE>
<DL>
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<A NAME="Session(java.lang.String)"><!-- --></A><H3>
Session</H3>
<PRE>
public <B>Session</B>(java.lang.String driverClass)</PRE>
<DL>
<DD>Session consructor<DD><DL>
<DT><B>Parameters:</B><DD><CODE>driverClass</CODE> - class of database driver</DL>
</DD>
</DL>
<HR>
<A NAME="Session()"><!-- --></A><H3>
Session</H3>
<PRE>
public <B>Session</B>()</PRE>
<DL>
<DD>Session consructor for ODBC bridge driver</DL>
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<A NAME="handleSQLException(java.sql.SQLException)"><!-- --></A><H3>
handleSQLException</H3>
<PRE>
public void <B>handleSQLException</B>(java.sql.SQLException ex)</PRE>
<DL>
<DD>Handler of database session errors. Programmer should override this method in derived class in order to provide application dependent error handling.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>ex</CODE> - exception thrown by some of JDBC methods</DL>
</DD>
</DL>
<HR>
<A NAME="open(java.lang.String, java.lang.String, java.lang.String)"><!-- --></A><H3>
open</H3>
<PRE>
public boolean <B>open</B>(java.lang.String dataSource, java.lang.String user, java.lang.String password)</PRE>
<DL>
<DD>Open database session. Attempt to establish a connection to the given database URL. The DriverManager attempts to select an appropriate driver from the set of registered JDBC drivers.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>url</CODE> - a database url of the form jdbc:<em>subprotocol</em>:<em>subname</em><DD><CODE>user</CODE> - the database user on whose behalf the Connection is being made<DD><CODE>password</CODE> - the user's password<DT><B>Returns:</B><DD>true if session is succesfully openned, false otherwise</DL>
</DD>
</DL>
<HR>
<A NAME="close()"><!-- --></A><H3>
close</H3>
<PRE>
public void <B>close</B>()</PRE>
<DL>
<DD>Close database session and release all resources holded by session.</DL>
<HR>
<A NAME="execute(java.lang.String)"><!-- --></A><H3>
execute</H3>
<PRE>
public int <B>execute</B>(java.lang.String sql)</PRE>
<DL>
<DD>Execute a SQL INSERT, UPDATE or DELETE statement. In addition, SQL statements that return nothing such as SQL DDL statements can be executed.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>sql</CODE> - a SQL INSERT, UPDATE or DELETE statement or a SQL statement that returns nothing<DT><B>Returns:</B><DD>either the row count for INSERT, UPDATE or DELETE or 0 for SQL statements that return nothing</DL>
</DD>
</DL>
<HR>
<A NAME="commit()"><!-- --></A><H3>
commit</H3>
<PRE>
public void <B>commit</B>()</PRE>
<DL>
<DD>Commit makes all changes made since the previous commit/rollback permanent and releases any database locks currently held by the Connection. This method should only be used when auto commit has been disabled.</DL>
<HR>
<A NAME="rollback()"><!-- --></A><H3>
rollback</H3>
<PRE>
public void <B>rollback</B>()</PRE>
<DL>
<DD>Rollback drops all changes made since the previous commit/rollback and releases any database locks currently held by the Connection. This method should only be used when auto commit has been disabled.</DL>
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