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ReplicationTransport (Sleepycat Software, Inc. - Berkeley DB Java API)
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<b>Berkeley DB</b><br><font size="-1"> version 4.3.21</font></EM>
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com.sleepycat.db</FONT>
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Interface ReplicationTransport</H2>
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<DL>
<DT>public interface <B>ReplicationTransport</B></DL>
<P>
An interface specifying a replication transmit function, which sends
information to other members of the replication group.
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<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/ReplicationTransport.html#EID_BROADCAST">EID_BROADCAST</A></B></CODE>
<BR>
A message that should be broadcast to every environment in the
replication group.</TD>
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<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/ReplicationTransport.html#EID_INVALID">EID_INVALID</A></B></CODE>
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An invalid environment ID, and may be used to initialize environment ID
variables that are subsequently checked for validity.</TD>
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<CODE> int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../com/sleepycat/db/ReplicationTransport.html#send(com.sleepycat.db.Environment, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.LogSequenceNumber, int, boolean, boolean)">send</A></B>(<A HREF="../../../com/sleepycat/db/Environment.html" title="class in com.sleepycat.db">Environment</A> environment,
<A HREF="../../../com/sleepycat/db/DatabaseEntry.html" title="class in com.sleepycat.db">DatabaseEntry</A> control,
<A HREF="../../../com/sleepycat/db/DatabaseEntry.html" title="class in com.sleepycat.db">DatabaseEntry</A> rec,
<A HREF="../../../com/sleepycat/db/LogSequenceNumber.html" title="class in com.sleepycat.db">LogSequenceNumber</A> lsn,
int envid,
boolean noBuffer,
boolean permanent)</CODE>
<BR>
The callback used when Berkeley DB needs to transmit a replication
message.</TD>
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<A NAME="EID_BROADCAST"><!-- --></A><H3>
EID_BROADCAST</H3>
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public static final int <B>EID_BROADCAST</B></PRE>
<DL>
<DD>A message that should be broadcast to every environment in the
replication group. The application may use a true broadcast protocol or
may send the message in sequence to each machine with which it is in
communication. In both cases, the sending site should not be asked to
process the message.
<P>
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<DT><B>See Also:</B><DD><A HREF="../../../constant-values.html#com.sleepycat.db.ReplicationTransport.EID_BROADCAST">Constant Field Values</A></DL>
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<A NAME="EID_INVALID"><!-- --></A><H3>
EID_INVALID</H3>
<PRE>
public static final int <B>EID_INVALID</B></PRE>
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<DD>An invalid environment ID, and may be used to initialize environment ID
variables that are subsequently checked for validity.
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<DT><B>See Also:</B><DD><A HREF="../../../constant-values.html#com.sleepycat.db.ReplicationTransport.EID_INVALID">Constant Field Values</A></DL>
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<A NAME="send(com.sleepycat.db.Environment, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.LogSequenceNumber, int, boolean, boolean)"><!-- --></A><H3>
send</H3>
<PRE>
public int <B>send</B>(<A HREF="../../../com/sleepycat/db/Environment.html" title="class in com.sleepycat.db">Environment</A> environment,
<A HREF="../../../com/sleepycat/db/DatabaseEntry.html" title="class in com.sleepycat.db">DatabaseEntry</A> control,
<A HREF="../../../com/sleepycat/db/DatabaseEntry.html" title="class in com.sleepycat.db">DatabaseEntry</A> rec,
<A HREF="../../../com/sleepycat/db/LogSequenceNumber.html" title="class in com.sleepycat.db">LogSequenceNumber</A> lsn,
int envid,
boolean noBuffer,
boolean permanent)
throws <A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></PRE>
<DL>
<DD>The callback used when Berkeley DB needs to transmit a replication
message. This method must not call back down into Berkeley DB. It must
return 0 on success and non-zero on failure. If the transmission fails,
the message being sent is necessary to maintain database integrity, and
the local log is not configured for synchronous flushing, the local log
will be flushed; otherwise, any error from the function will be ignored.
<p>
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>environment</CODE> - The enclosing database environment handle.
<p><DD><CODE>control</CODE> - The first of the two data elements to be transmitted.
<p><DD><CODE>rec</CODE> - The second of the two data elements to be transmitted.
<p><DD><CODE>lsn</CODE> - If the type of message to be sent has an LSN associated with it,
then the lsn contains the LSN of the record being sent. This LSN
can be used to determine that certain records have been processed
successfully by clients.
<p><DD><CODE>envid</CODE> - A positive integer identifier that specifies the replication
environment to which the message should be sent.
<p>
The value DB_EID_BROADCAST indicates that a message should be
broadcast to every environment in the replication group. The
application may use a true broadcast protocol or may send the
message in sequence to each machine with which it is in
communication. In both cases, the sending site should not be asked
to process the message.
<p><DD><CODE>noBuffer</CODE> - The record being sent should be transmitted immediately and not buffered
or delayed.
<p><DD><CODE>permanent</CODE> - The record being sent is critical for maintaining database integrity
(for example, the message includes a transaction commit). The
application should take appropriate action to enforce the reliability
guarantees it has chosen, such as waiting for acknowledgement from one
or more clients.
<p>
<p>
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../com/sleepycat/db/DatabaseException.html" title="class in com.sleepycat.db">DatabaseException</A></CODE> - if a failure occurs.</DL>
</DD>
</DL>
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