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jTDS API: Class SharedSocket
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net.sourceforge.jtds.jdbc</FONT>
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Class SharedSocket</H2>
<PRE>
java.lang.Object
|
+--<B>net.sourceforge.jtds.jdbc.SharedSocket</B>
</PRE>
<DL>
<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedLocalNamedPipe.html">SharedLocalNamedPipe</A>, <A HREF="../../../../net/sourceforge/jtds/jdbc/SharedNamedPipe.html">SharedNamedPipe</A></DD>
</DL>
<HR>
<DL>
<DT> class <B>SharedSocket</B><DT>extends java.lang.Object</DL>
<P>
This class mananges the physical connection to the SQL Server and
serialises its use amongst a number of virtual sockets.
This allows one physical connection to service a number of concurrent
statements.
<p>
Constraints and assumptions:
<ol>
<li>Callers will not attempt to read from the server without issuing a request first.
<li>The end of a server reply can be identified as byte 2 of the header is non zero.
</ol>
</p>
Comments:
<ol>
<li>This code will discard unread server data if a new request is issued.
Currently the higher levels of the driver attempt to do this but may be
we can just rely on this code instead.
<li>A cancel can be issued by a caller only if the server is currently sending
data for the caller otherwise the cancel is ignored.
<li>Cancel packets on their own are returned as extra records appended to the
previous packet so that the TdsCore module can process them.
</ol>
This version of the class will start to cache results to disk once a predetermined
maximum buffer memory threshold has been passed. Small result sets that will fit
within a specified limit (default 8 packets) will continue to be held in memory
(even if the memory threshold has been passed) in the interests of efficiency.
<P>
<DL>
<DT><B>Version: </B><DD>$Id: SharedSocket.java,v 1.39 2007/07/08 21:38:13 bheineman Exp $</DD>
<DT><B>Author: </B><DD>Mike Hutchinson.</DD>
</DL>
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<CODE>private static class</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.VirtualSocket.html">SharedSocket.VirtualSocket</A></B></CODE>
<BR>
This inner class contains the state information for the virtual socket.</TD>
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<CODE>private java.io.File</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#bufferDir">bufferDir</A></B></CODE>
<BR>
The directory to buffer data to.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.lang.Object</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#cancelMonitor">cancelMonitor</A></B></CODE>
<BR>
Synchronization monitor for <A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#cancelPending"><CODE>cancelPending</CODE></A> and
<A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#responseOwner"><CODE>responseOwner</CODE></A>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
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<CODE>private boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#cancelPending">cancelPending</A></B></CODE>
<BR>
A cancel packet is pending.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private <A HREF="../../../../net/sourceforge/jtds/jdbc/CharsetInfo.html">CharsetInfo</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#charsetInfo">charsetInfo</A></B></CODE>
<BR>
The character set to use for converting strings to/from bytes.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private byte[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#doneBuffer">doneBuffer</A></B></CODE>
<BR>
Buffer for TDS_DONE packets</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#globalMemUsage">globalMemUsage</A></B></CODE>
<BR>
Total memory usage in all instances of the driver
NB.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private byte[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#hdrBuf">hdrBuf</A></B></CODE>
<BR>
Buffer for packet header.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#host">host</A></B></CODE>
<BR>
The server host name.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.io.DataInputStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#in">in</A></B></CODE>
<BR>
Input stream for network socket.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#maxBufSize">maxBufSize</A></B></CODE>
<BR>
Current maxium input buffer size.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#memoryBudget">memoryBudget</A></B></CODE>
<BR>
Max memory limit to use for buffers.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#minMemPkts">minMemPkts</A></B></CODE>
<BR>
Minimum number of packets that will be cached in memory
before the driver tries to write to disk even if
memoryBudget has been exceeded.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.io.DataOutputStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#out">out</A></B></CODE>
<BR>
Output stream for network socket.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#packetCount">packetCount</A></B></CODE>
<BR>
Count of packets received.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#peakMemUsage">peakMemUsage</A></B></CODE>
<BR>
Peak memory usage for debug purposes.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#port">port</A></B></CODE>
<BR>
The server port number.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#responseOwner">responseOwner</A></B></CODE>
<BR>
The Stream ID of the object that is expecting a response from the server.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#securityViolation">securityViolation</A></B></CODE>
<BR>
Global flag to indicate that security constraints mean
that attempts to create work files will fail.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#serverType">serverType</A></B></CODE>
<BR>
The servertype one of Driver.SQLSERVER or Driver.SYBASE</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.net.Socket</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#socket">socket</A></B></CODE>
<BR>
The shared network socket.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.util.ArrayList</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#socketTable">socketTable</A></B></CODE>
<BR>
Table of stream objects sharing this socket.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.net.Socket</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#sslSocket">sslSocket</A></B></CODE>
<BR>
The shared SSL network socket;</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#TDS_DONE_LEN">TDS_DONE_LEN</A></B></CODE>
<BR>
Length of a TDS_DONE token.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#TDS_DONE_TOKEN">TDS_DONE_TOKEN</A></B></CODE>
<BR>
TDS done token.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#TDS_HDR_LEN">TDS_HDR_LEN</A></B></CODE>
<BR>
Length of TDS packet header.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#tdsVersion">tdsVersion</A></B></CODE>
<BR>
Tds protocol version</TD>
</TR>
</TABLE>
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
<A NAME="constructor_summary"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=2><FONT SIZE="+2">
<B>Constructor Summary</B></FONT></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private)</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#SharedSocket(net.sourceforge.jtds.jdbc.ConnectionJDBC2)">SharedSocket</A></B>(<A HREF="../../../../net/sourceforge/jtds/jdbc/ConnectionJDBC2.html">ConnectionJDBC2</A> connection)</CODE>
<BR>
Construct a <code>SharedSocket</code> object specifying host name and
port.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected </CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#SharedSocket(java.io.File, int, int)">SharedSocket</A></B>(java.io.File bufferDir,
int tdsVersion,
int serverType)</CODE>
<BR>
</TD>
</TR>
</TABLE>
<!-- ========== METHOD SUMMARY =========== -->
<A NAME="method_summary"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=2><FONT SIZE="+2">
<B>Method Summary</B></FONT></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#cancel(int)">cancel</A></B>(int streamId)</CODE>
<BR>
Send a TDS cancel packet to the server.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#close()">close</A></B>()</CODE>
<BR>
Close the socket and release all resources.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#closeStream(int)">closeStream</A></B>(int streamId)</CODE>
<BR>
Deallocate a stream linked to this socket.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private java.net.Socket</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#createSocketForJDBC3(net.sourceforge.jtds.jdbc.ConnectionJDBC2)">createSocketForJDBC3</A></B>(<A HREF="../../../../net/sourceforge/jtds/jdbc/ConnectionJDBC2.html">ConnectionJDBC2</A> connection)</CODE>
<BR>
Creates a <A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.VirtualSocket.html"><CODE>SharedSocket.VirtualSocket</CODE></A> through reflection when <A HREF="../../../../net/sourceforge/jtds/jdbc/Driver.html#JDBC3"><CODE>Driver.JDBC3</CODE></A>
is <code>true</code>.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private byte[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#dequeueInput(net.sourceforge.jtds.jdbc.SharedSocket.VirtualSocket)">dequeueInput</A></B>(<A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.VirtualSocket.html">SharedSocket.VirtualSocket</A> vsock)</CODE>
<BR>
Read a cached packet from the in memory queue or from a disk based queue.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#disableEncryption()">disableEncryption</A></B>()</CODE>
<BR>
Disable TLS encryption and switch back to raw TCP/IP socket.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#enableEncryption(java.lang.String)">enableEncryption</A></B>(java.lang.String ssl)</CODE>
<BR>
Enable TLS encryption by creating a TLS socket over the
existing TCP/IP network socket.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#enqueueInput(net.sourceforge.jtds.jdbc.SharedSocket.VirtualSocket, byte[])">enqueueInput</A></B>(<A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.VirtualSocket.html">SharedSocket.VirtualSocket</A> vsock,
byte[] buffer)</CODE>
<BR>
Save a packet buffer in a memory queue or to a disk queue if the global
memory limit for the driver has been exceeded.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#forceClose()">forceClose</A></B>()</CODE>
<BR>
Force close the socket causing any pending reads/writes to fail.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#getCharset()">getCharset</A></B>()</CODE>
<BR>
Retrieve the character set name used to translate byte arrays to
or from Strings.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) <A HREF="../../../../net/sourceforge/jtds/jdbc/CharsetInfo.html">CharsetInfo</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#getCharsetInfo()">getCharsetInfo</A></B>()</CODE>
<BR>
Retrieve the character set descriptor used to translate byte arrays to
or from Strings.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#getHost()">getHost</A></B>()</CODE>
<BR>
Get the server host name.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected java.io.DataInputStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#getIn()">getIn</A></B>()</CODE>
<BR>
Getter for <A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#in"><CODE>in</CODE></A> field.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#getMemoryBudget()">getMemoryBudget</A></B>()</CODE>
<BR>
Get the global buffer memory limit for all instancs of this driver.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#getMinMemPkts()">getMinMemPkts</A></B>()</CODE>
<BR>
Get the minimum number of memory cached packets.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) byte[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#getNetPacket(int, byte[])">getNetPacket</A></B>(int streamId,
byte[] buffer)</CODE>
<BR>
Get a network packet.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected java.io.DataOutputStream</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#getOut()">getOut</A></B>()</CODE>
<BR>
Getter for <A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#out"><CODE>out</CODE></A> field.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#getPktLen(byte[])">getPktLen</A></B>(byte[] buf)</CODE>
<BR>
Convert two bytes (in network byte order) in a byte array into a Java
short integer.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#getPort()">getPort</A></B>()</CODE>
<BR>
Get the server port number.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) <A HREF="../../../../net/sourceforge/jtds/jdbc/RequestStream.html">RequestStream</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#getRequestStream(int, int)">getRequestStream</A></B>(int bufferSize,
int maxPrecision)</CODE>
<BR>
Obtain an instance of a server request stream for this socket.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) <A HREF="../../../../net/sourceforge/jtds/jdbc/ResponseStream.html">ResponseStream</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#getResponseStream(net.sourceforge.jtds.jdbc.RequestStream, int)">getResponseStream</A></B>(<A HREF="../../../../net/sourceforge/jtds/jdbc/RequestStream.html">RequestStream</A> requestStream,
int bufferSize)</CODE>
<BR>
Obtain an instance of a server response stream for this socket.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#getTdsVersion()">getTdsVersion</A></B>()</CODE>
<BR>
Retrieve the TDS version that is active on the connection
supported by this socket.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#isConnected()">isConnected</A></B>()</CODE>
<BR>
Get the connected status of this socket.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private <A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.VirtualSocket.html">SharedSocket.VirtualSocket</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#lookup(int)">lookup</A></B>(int streamId)</CODE>
<BR>
Retrieves the virtual socket with the given id.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private byte[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#readPacket(byte[])">readPacket</A></B>(byte[] buffer)</CODE>
<BR>
Read a physical TDS packet from the network.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) byte[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#sendNetPacket(int, byte[])">sendNetPacket</A></B>(int streamId,
byte[] buffer)</CODE>
<BR>
Send a network packet.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#setCharsetInfo(net.sourceforge.jtds.jdbc.CharsetInfo)">setCharsetInfo</A></B>(<A HREF="../../../../net/sourceforge/jtds/jdbc/CharsetInfo.html">CharsetInfo</A> charsetInfo)</CODE>
<BR>
Set the character set descriptor to be used to translate byte arrays to
or from Strings.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#setIn(java.io.DataInputStream)">setIn</A></B>(java.io.DataInputStream in)</CODE>
<BR>
Setter for <A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#in"><CODE>in</CODE></A> field.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) static void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#setMemoryBudget(int)">setMemoryBudget</A></B>(int memoryBudget)</CODE>
<BR>
Set the global buffer memory limit for all instances of this driver.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>(package private) static void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#setMinMemPkts(int)">setMinMemPkts</A></B>(int minMemPkts)</CODE>
<BR>
Set the minimum number of packets to cache in memory before
writing to disk.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#setOut(java.io.DataOutputStream)">setOut</A></B>(java.io.DataOutputStream out)</CODE>
<BR>
Setter for <A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#out"><CODE>out</CODE></A> field.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#setTdsVersion(int)">setTdsVersion</A></B>(int tdsVersion)</CODE>
<BR>
Set the TDS version field.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>protected void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#setTimeout(int)">setTimeout</A></B>(int timeout)</CODE>
<BR>
Set the socket timeout.</TD>
</TR>
</TABLE>
<A NAME="methods_inherited_from_class_java.lang.Object"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor">
<TD><B>Methods inherited from class java.lang.Object</B></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><clinit>, clone, equals, finalize, getClass, hashCode, notify, notifyAll, registerNatives, toString, wait, wait, wait</CODE></TD>
</TR>
</TABLE>
<P>
<!-- ============ FIELD DETAIL =========== -->
<A NAME="field_detail"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Field Detail</B></FONT></TD>
</TR>
</TABLE>
<A NAME="socket"><!-- --></A><H3>
socket</H3>
<PRE>
private java.net.Socket <B>socket</B></PRE>
<DL>
<DD>The shared network socket.</DL>
<HR>
<A NAME="sslSocket"><!-- --></A><H3>
sslSocket</H3>
<PRE>
private java.net.Socket <B>sslSocket</B></PRE>
<DL>
<DD>The shared SSL network socket;</DL>
<HR>
<A NAME="out"><!-- --></A><H3>
out</H3>
<PRE>
private java.io.DataOutputStream <B>out</B></PRE>
<DL>
<DD>Output stream for network socket.</DL>
<HR>
<A NAME="in"><!-- --></A><H3>
in</H3>
<PRE>
private java.io.DataInputStream <B>in</B></PRE>
<DL>
<DD>Input stream for network socket.</DL>
<HR>
<A NAME="maxBufSize"><!-- --></A><H3>
maxBufSize</H3>
<PRE>
private int <B>maxBufSize</B></PRE>
<DL>
<DD>Current maxium input buffer size.</DL>
<HR>
<A NAME="socketTable"><!-- --></A><H3>
socketTable</H3>
<PRE>
private final java.util.ArrayList <B>socketTable</B></PRE>
<DL>
<DD>Table of stream objects sharing this socket.</DL>
<HR>
<A NAME="responseOwner"><!-- --></A><H3>
responseOwner</H3>
<PRE>
private int <B>responseOwner</B></PRE>
<DL>
<DD>The Stream ID of the object that is expecting a response from the server.</DL>
<HR>
<A NAME="hdrBuf"><!-- --></A><H3>
hdrBuf</H3>
<PRE>
private final byte[] <B>hdrBuf</B></PRE>
<DL>
<DD>Buffer for packet header.</DL>
<HR>
<A NAME="bufferDir"><!-- --></A><H3>
bufferDir</H3>
<PRE>
private final java.io.File <B>bufferDir</B></PRE>
<DL>
<DD>The directory to buffer data to.</DL>
<HR>
<A NAME="globalMemUsage"><!-- --></A><H3>
globalMemUsage</H3>
<PRE>
private static int <B>globalMemUsage</B></PRE>
<DL>
<DD>Total memory usage in all instances of the driver
NB. Access to this field should probably be synchronized
but in practice lost updates will not matter much and I think
all VMs tend to do atomic saves to integer variables.</DL>
<HR>
<A NAME="peakMemUsage"><!-- --></A><H3>
peakMemUsage</H3>
<PRE>
private static int <B>peakMemUsage</B></PRE>
<DL>
<DD>Peak memory usage for debug purposes.</DL>
<HR>
<A NAME="memoryBudget"><!-- --></A><H3>
memoryBudget</H3>
<PRE>
private static int <B>memoryBudget</B></PRE>
<DL>
<DD>Max memory limit to use for buffers.
Only when this limit is exceeded will the driver
start caching to disk.</DL>
<HR>
<A NAME="minMemPkts"><!-- --></A><H3>
minMemPkts</H3>
<PRE>
private static int <B>minMemPkts</B></PRE>
<DL>
<DD>Minimum number of packets that will be cached in memory
before the driver tries to write to disk even if
memoryBudget has been exceeded.</DL>
<HR>
<A NAME="securityViolation"><!-- --></A><H3>
securityViolation</H3>
<PRE>
private static boolean <B>securityViolation</B></PRE>
<DL>
<DD>Global flag to indicate that security constraints mean
that attempts to create work files will fail.</DL>
<HR>
<A NAME="tdsVersion"><!-- --></A><H3>
tdsVersion</H3>
<PRE>
private int <B>tdsVersion</B></PRE>
<DL>
<DD>Tds protocol version</DL>
<HR>
<A NAME="serverType"><!-- --></A><H3>
serverType</H3>
<PRE>
protected final int <B>serverType</B></PRE>
<DL>
<DD>The servertype one of Driver.SQLSERVER or Driver.SYBASE</DL>
<HR>
<A NAME="charsetInfo"><!-- --></A><H3>
charsetInfo</H3>
<PRE>
private <A HREF="../../../../net/sourceforge/jtds/jdbc/CharsetInfo.html">CharsetInfo</A> <B>charsetInfo</B></PRE>
<DL>
<DD>The character set to use for converting strings to/from bytes.</DL>
<HR>
<A NAME="packetCount"><!-- --></A><H3>
packetCount</H3>
<PRE>
private int <B>packetCount</B></PRE>
<DL>
<DD>Count of packets received.</DL>
<HR>
<A NAME="host"><!-- --></A><H3>
host</H3>
<PRE>
private java.lang.String <B>host</B></PRE>
<DL>
<DD>The server host name.</DL>
<HR>
<A NAME="port"><!-- --></A><H3>
port</H3>
<PRE>
private int <B>port</B></PRE>
<DL>
<DD>The server port number.</DL>
<HR>
<A NAME="cancelPending"><!-- --></A><H3>
cancelPending</H3>
<PRE>
private boolean <B>cancelPending</B></PRE>
<DL>
<DD>A cancel packet is pending.</DL>
<HR>
<A NAME="cancelMonitor"><!-- --></A><H3>
cancelMonitor</H3>
<PRE>
private java.lang.Object <B>cancelMonitor</B></PRE>
<DL>
<DD>Synchronization monitor for <A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#cancelPending"><CODE>cancelPending</CODE></A> and
<A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#responseOwner"><CODE>responseOwner</CODE></A>.</DL>
<HR>
<A NAME="doneBuffer"><!-- --></A><H3>
doneBuffer</H3>
<PRE>
private byte[] <B>doneBuffer</B></PRE>
<DL>
<DD>Buffer for TDS_DONE packets</DL>
<HR>
<A NAME="TDS_DONE_TOKEN"><!-- --></A><H3>
TDS_DONE_TOKEN</H3>
<PRE>
private static final int <B>TDS_DONE_TOKEN</B></PRE>
<DL>
<DD>TDS done token.</DL>
<HR>
<A NAME="TDS_DONE_LEN"><!-- --></A><H3>
TDS_DONE_LEN</H3>
<PRE>
private static final int <B>TDS_DONE_LEN</B></PRE>
<DL>
<DD>Length of a TDS_DONE token.</DL>
<HR>
<A NAME="TDS_HDR_LEN"><!-- --></A><H3>
TDS_HDR_LEN</H3>
<PRE>
private static final int <B>TDS_HDR_LEN</B></PRE>
<DL>
<DD>Length of TDS packet header.</DL>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<A NAME="constructor_detail"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Constructor Detail</B></FONT></TD>
</TR>
</TABLE>
<A NAME="SharedSocket(java.io.File, int, int)"><!-- --></A><H3>
SharedSocket</H3>
<PRE>
protected <B>SharedSocket</B>(java.io.File bufferDir,
int tdsVersion,
int serverType)</PRE>
<DL>
</DL>
<HR>
<A NAME="SharedSocket(net.sourceforge.jtds.jdbc.ConnectionJDBC2)"><!-- --></A><H3>
SharedSocket</H3>
<PRE>
<B>SharedSocket</B>(<A HREF="../../../../net/sourceforge/jtds/jdbc/ConnectionJDBC2.html">ConnectionJDBC2</A> connection)
throws java.io.IOException,
java.net.UnknownHostException</PRE>
<DL>
<DD>Construct a <code>SharedSocket</code> object specifying host name and
port.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>connection</CODE> - the connection object<DT><B>Throws:</B><DD><CODE>java.io.IOException</CODE> - if socket open fails</DL>
</DD>
</DL>
<!-- ============ METHOD DETAIL ========== -->
<A NAME="method_detail"><!-- --></A>
<TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=1><FONT SIZE="+2">
<B>Method Detail</B></FONT></TD>
</TR>
</TABLE>
<A NAME="createSocketForJDBC3(net.sourceforge.jtds.jdbc.ConnectionJDBC2)"><!-- --></A><H3>
createSocketForJDBC3</H3>
<PRE>
private java.net.Socket <B>createSocketForJDBC3</B>(<A HREF="../../../../net/sourceforge/jtds/jdbc/ConnectionJDBC2.html">ConnectionJDBC2</A> connection)
throws java.io.IOException</PRE>
<DL>
<DD>Creates a <A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.VirtualSocket.html"><CODE>SharedSocket.VirtualSocket</CODE></A> through reflection when <A HREF="../../../../net/sourceforge/jtds/jdbc/Driver.html#JDBC3"><CODE>Driver.JDBC3</CODE></A>
is <code>true</code>. Reflection must be used to stay compatible
with JDK 1.3.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>connection</CODE> - the connection object<DT><B>Returns:</B><DD>a socket open to the host and port with the given timeout<DT><B>Throws:</B><DD><CODE>java.io.IOException</CODE> - if socket open fails</DL>
</DD>
</DL>
<HR>
<A NAME="enableEncryption(java.lang.String)"><!-- --></A><H3>
enableEncryption</H3>
<PRE>
void <B>enableEncryption</B>(java.lang.String ssl)
throws java.io.IOException</PRE>
<DL>
<DD>Enable TLS encryption by creating a TLS socket over the
existing TCP/IP network socket.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>ssl</CODE> - the SSL URL property value<DT><B>Throws:</B><DD><CODE>java.io.IOException</CODE> - if an I/O error occurs</DL>
</DD>
</DL>
<HR>
<A NAME="disableEncryption()"><!-- --></A><H3>
disableEncryption</H3>
<PRE>
void <B>disableEncryption</B>()
throws java.io.IOException</PRE>
<DL>
<DD>Disable TLS encryption and switch back to raw TCP/IP socket.<DD><DL>
<DT><B>Throws:</B><DD><CODE>java.io.IOException</CODE> - if an I/O error occurs</DL>
</DD>
</DL>
<HR>
<A NAME="setCharsetInfo(net.sourceforge.jtds.jdbc.CharsetInfo)"><!-- --></A><H3>
setCharsetInfo</H3>
<PRE>
void <B>setCharsetInfo</B>(<A HREF="../../../../net/sourceforge/jtds/jdbc/CharsetInfo.html">CharsetInfo</A> charsetInfo)</PRE>
<DL>
<DD>Set the character set descriptor to be used to translate byte arrays to
or from Strings.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>charsetInfo</CODE> - the character set descriptor</DL>
</DD>
</DL>
<HR>
<A NAME="getCharsetInfo()"><!-- --></A><H3>
getCharsetInfo</H3>
<PRE>
<A HREF="../../../../net/sourceforge/jtds/jdbc/CharsetInfo.html">CharsetInfo</A> <B>getCharsetInfo</B>()</PRE>
<DL>
<DD>Retrieve the character set descriptor used to translate byte arrays to
or from Strings.</DL>
<HR>
<A NAME="getCharset()"><!-- --></A><H3>
getCharset</H3>
<PRE>
java.lang.String <B>getCharset</B>()</PRE>
<DL>
<DD>Retrieve the character set name used to translate byte arrays to
or from Strings.<DD><DL>
<DT><B>Returns:</B><DD>the character set name as a <code>String</code></DL>
</DD>
</DL>
<HR>
<A NAME="getRequestStream(int, int)"><!-- --></A><H3>
getRequestStream</H3>
<PRE>
<A HREF="../../../../net/sourceforge/jtds/jdbc/RequestStream.html">RequestStream</A> <B>getRequestStream</B>(int bufferSize,
int maxPrecision)</PRE>
<DL>
<DD>Obtain an instance of a server request stream for this socket.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>bufferSize</CODE> - the initial buffer size to be used by the
<code>RequestStream</code><DD><CODE>maxPrecision</CODE> - the maximum precision for numeric/decimal types<DT><B>Returns:</B><DD>the server request stream as a <code>RequestStream</code></DL>
</DD>
</DL>
<HR>
<A NAME="getResponseStream(net.sourceforge.jtds.jdbc.RequestStream, int)"><!-- --></A><H3>
getResponseStream</H3>
<PRE>
<A HREF="../../../../net/sourceforge/jtds/jdbc/ResponseStream.html">ResponseStream</A> <B>getResponseStream</B>(<A HREF="../../../../net/sourceforge/jtds/jdbc/RequestStream.html">RequestStream</A> requestStream,
int bufferSize)</PRE>
<DL>
<DD>Obtain an instance of a server response stream for this socket.
NB. getRequestStream() must be used first to obtain the RequestStream
needed as a parameter for this method.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>requestStream</CODE> - an existing server request stream object obtained
from this <code>SharedSocket</code><DD><CODE>bufferSize</CODE> - the initial buffer size to be used by the
<code>RequestStream</code><DT><B>Returns:</B><DD>the server response stream as a <code>ResponseStream</code></DL>
</DD>
</DL>
<HR>
<A NAME="getTdsVersion()"><!-- --></A><H3>
getTdsVersion</H3>
<PRE>
int <B>getTdsVersion</B>()</PRE>
<DL>
<DD>Retrieve the TDS version that is active on the connection
supported by this socket.<DD><DL>
<DT><B>Returns:</B><DD>the TDS version as an <code>int</code></DL>
</DD>
</DL>
<HR>
<A NAME="setTdsVersion(int)"><!-- --></A><H3>
setTdsVersion</H3>
<PRE>
protected void <B>setTdsVersion</B>(int tdsVersion)</PRE>
<DL>
<DD>Set the TDS version field.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>tdsVersion</CODE> - the TDS version as an <code>int</code></DL>
</DD>
</DL>
<HR>
<A NAME="setMemoryBudget(int)"><!-- --></A><H3>
setMemoryBudget</H3>
<PRE>
static void <B>setMemoryBudget</B>(int memoryBudget)</PRE>
<DL>
<DD>Set the global buffer memory limit for all instances of this driver.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>memoryBudget</CODE> - the global memory budget</DL>
</DD>
</DL>
<HR>
<A NAME="getMemoryBudget()"><!-- --></A><H3>
getMemoryBudget</H3>
<PRE>
static int <B>getMemoryBudget</B>()</PRE>
<DL>
<DD>Get the global buffer memory limit for all instancs of this driver.<DD><DL>
<DT><B>Returns:</B><DD>the memory limit as an <code>int</code></DL>
</DD>
</DL>
<HR>
<A NAME="setMinMemPkts(int)"><!-- --></A><H3>
setMinMemPkts</H3>
<PRE>
static void <B>setMinMemPkts</B>(int minMemPkts)</PRE>
<DL>
<DD>Set the minimum number of packets to cache in memory before
writing to disk.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>minMemPkts</CODE> - the minimum number of packets to cache</DL>
</DD>
</DL>
<HR>
<A NAME="getMinMemPkts()"><!-- --></A><H3>
getMinMemPkts</H3>
<PRE>
static int <B>getMinMemPkts</B>()</PRE>
<DL>
<DD>Get the minimum number of memory cached packets.<DD><DL>
<DT><B>Returns:</B><DD>minimum memory packets as an <code>int</code></DL>
</DD>
</DL>
<HR>
<A NAME="isConnected()"><!-- --></A><H3>
isConnected</H3>
<PRE>
boolean <B>isConnected</B>()</PRE>
<DL>
<DD>Get the connected status of this socket.<DD><DL>
<DT><B>Returns:</B><DD><code>true</code> if the underlying socket is connected</DL>
</DD>
</DL>
<HR>
<A NAME="cancel(int)"><!-- --></A><H3>
cancel</H3>
<PRE>
boolean <B>cancel</B>(int streamId)</PRE>
<DL>
<DD>Send a TDS cancel packet to the server.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>streamId</CODE> - the <code>RequestStream</code> id<DT><B>Returns:</B><DD><code>boolean</code> true if a cancel is actually
issued by this method call.</DL>
</DD>
</DL>
<HR>
<A NAME="close()"><!-- --></A><H3>
close</H3>
<PRE>
void <B>close</B>()
throws java.io.IOException</PRE>
<DL>
<DD>Close the socket and release all resources.<DD><DL>
<DT><B>Throws:</B><DD><CODE>java.io.IOException</CODE> - if the socket close fails</DL>
</DD>
</DL>
<HR>
<A NAME="forceClose()"><!-- --></A><H3>
forceClose</H3>
<PRE>
void <B>forceClose</B>()</PRE>
<DL>
<DD>Force close the socket causing any pending reads/writes to fail.
<p>
Used by the login timer to abort a login attempt.</DL>
<HR>
<A NAME="closeStream(int)"><!-- --></A><H3>
closeStream</H3>
<PRE>
void <B>closeStream</B>(int streamId)</PRE>
<DL>
<DD>Deallocate a stream linked to this socket.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>streamId</CODE> - the <code>ResponseStream</code> id</DL>
</DD>
</DL>
<HR>
<A NAME="sendNetPacket(int, byte[])"><!-- --></A><H3>
sendNetPacket</H3>
<PRE>
byte[] <B>sendNetPacket</B>(int streamId,
byte[] buffer)
throws java.io.IOException</PRE>
<DL>
<DD>Send a network packet. If output for another virtual socket is
in progress this packet will be sent later.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>streamId</CODE> - the originating <code>RequestStream</code> object<DD><CODE>buffer</CODE> - the data to send<DT><B>Returns:</B><DD>the same buffer received if emptied or another buffer w/ the
same size if the incoming buffer is cached (to avoid copying)<DT><B>Throws:</B><DD><CODE>java.io.IOException</CODE> - if an I/O error occurs</DL>
</DD>
</DL>
<HR>
<A NAME="getNetPacket(int, byte[])"><!-- --></A><H3>
getNetPacket</H3>
<PRE>
byte[] <B>getNetPacket</B>(int streamId,
byte[] buffer)
throws java.io.IOException</PRE>
<DL>
<DD>Get a network packet. This may be read from the network directly or from
previously cached buffers.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>streamId</CODE> - the originating ResponseStream object<DD><CODE>buffer</CODE> - the data buffer to receive the object (may be replaced)<DT><B>Returns:</B><DD>the data in a <code>byte[]</code> buffer<DT><B>Throws:</B><DD><CODE>java.io.IOException</CODE> - if an I/O error occurs</DL>
</DD>
</DL>
<HR>
<A NAME="enqueueInput(net.sourceforge.jtds.jdbc.SharedSocket.VirtualSocket, byte[])"><!-- --></A><H3>
enqueueInput</H3>
<PRE>
private void <B>enqueueInput</B>(<A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.VirtualSocket.html">SharedSocket.VirtualSocket</A> vsock,
byte[] buffer)
throws java.io.IOException</PRE>
<DL>
<DD>Save a packet buffer in a memory queue or to a disk queue if the global
memory limit for the driver has been exceeded.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>vsock</CODE> - the virtual socket owning this data<DD><CODE>buffer</CODE> - the data to queue</DL>
</DD>
</DL>
<HR>
<A NAME="dequeueInput(net.sourceforge.jtds.jdbc.SharedSocket.VirtualSocket)"><!-- --></A><H3>
dequeueInput</H3>
<PRE>
private byte[] <B>dequeueInput</B>(<A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.VirtualSocket.html">SharedSocket.VirtualSocket</A> vsock)
throws java.io.IOException</PRE>
<DL>
<DD>Read a cached packet from the in memory queue or from a disk based queue.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>vsock</CODE> - the virtual socket owning this data<DT><B>Returns:</B><DD>a buffer containing the packet</DL>
</DD>
</DL>
<HR>
<A NAME="readPacket(byte[])"><!-- --></A><H3>
readPacket</H3>
<PRE>
private byte[] <B>readPacket</B>(byte[] buffer)
throws java.io.IOException</PRE>
<DL>
<DD>Read a physical TDS packet from the network.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>buffer</CODE> - a buffer to read the data into (if it fits) or null<DT><B>Returns:</B><DD>either the incoming buffer if it was large enough or a newly
allocated buffer with the read packet</DL>
</DD>
</DL>
<HR>
<A NAME="lookup(int)"><!-- --></A><H3>
lookup</H3>
<PRE>
private <A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.VirtualSocket.html">SharedSocket.VirtualSocket</A> <B>lookup</B>(int streamId)</PRE>
<DL>
<DD>Retrieves the virtual socket with the given id.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>streamId</CODE> - id of the virtual socket to retrieve</DL>
</DD>
</DL>
<HR>
<A NAME="getPktLen(byte[])"><!-- --></A><H3>
getPktLen</H3>
<PRE>
static int <B>getPktLen</B>(byte[] buf)</PRE>
<DL>
<DD>Convert two bytes (in network byte order) in a byte array into a Java
short integer.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>buf</CODE> - array of data<DT><B>Returns:</B><DD>the 16 bit unsigned value as an <code>int</code></DL>
</DD>
</DL>
<HR>
<A NAME="setTimeout(int)"><!-- --></A><H3>
setTimeout</H3>
<PRE>
protected void <B>setTimeout</B>(int timeout)
throws java.net.SocketException</PRE>
<DL>
<DD>Set the socket timeout.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>timeout</CODE> - the timeout value in milliseconds</DL>
</DD>
</DL>
<HR>
<A NAME="getIn()"><!-- --></A><H3>
getIn</H3>
<PRE>
protected java.io.DataInputStream <B>getIn</B>()</PRE>
<DL>
<DD>Getter for <A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#in"><CODE>in</CODE></A> field.<DD><DL>
<DT><B>Returns:</B><DD><CODE>InputStream</CODE> used for communication</DL>
</DD>
</DL>
<HR>
<A NAME="setIn(java.io.DataInputStream)"><!-- --></A><H3>
setIn</H3>
<PRE>
protected void <B>setIn</B>(java.io.DataInputStream in)</PRE>
<DL>
<DD>Setter for <A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#in"><CODE>in</CODE></A> field.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>in</CODE> - the <CODE>InputStream</CODE> to be used for communication</DL>
</DD>
</DL>
<HR>
<A NAME="getOut()"><!-- --></A><H3>
getOut</H3>
<PRE>
protected java.io.DataOutputStream <B>getOut</B>()</PRE>
<DL>
<DD>Getter for <A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#out"><CODE>out</CODE></A> field.<DD><DL>
<DT><B>Returns:</B><DD><CODE>OutputStream</CODE> used for communication</DL>
</DD>
</DL>
<HR>
<A NAME="setOut(java.io.DataOutputStream)"><!-- --></A><H3>
setOut</H3>
<PRE>
protected void <B>setOut</B>(java.io.DataOutputStream out)</PRE>
<DL>
<DD>Setter for <A HREF="../../../../net/sourceforge/jtds/jdbc/SharedSocket.html#out"><CODE>out</CODE></A> field.<DD><DL>
<DT><B>Parameters:</B><DD><CODE>out</CODE> - the <CODE>OutputStream</CODE> to be used for communication</DL>
</DD>
</DL>
<HR>
<A NAME="getHost()"><!-- --></A><H3>
getHost</H3>
<PRE>
protected java.lang.String <B>getHost</B>()</PRE>
<DL>
<DD>Get the server host name.<DD><DL>
<DT><B>Returns:</B><DD>the host name as a <code>String</code></DL>
</DD>
</DL>
<HR>
<A NAME="getPort()"><!-- --></A><H3>
getPort</H3>
<PRE>
protected int <B>getPort</B>()</PRE>
<DL>
<DD>Get the server port number.<DD><DL>
<DT><B>Returns:</B><DD>the host port as an <code>int</code></DL>
</DD>
</DL>
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