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<h1>Initial Setup</h1><script>
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</script><p>When replicating objects to and from a db4o database, we
need to enable UUIDs and VersionNumbers. </p>
<p>UUIDs are object IDs that are unique across all databases
created with db4o. That is achieved by having the database creation
timestamp as part of its objects UUIDs. The db4o UUID contains two parts.
The first part contains an object ID. The second part identifies
the database that originally created this ID. More information on the UUIDs can be found in the <a href="http://developer.db4o.com/Resources/view.aspx/Reference/Implementation_Strategies/IDs_And_UUIDs/Unique_Universal_IDs">db4o
reference documentation</a>.<br>
The replication system will use the version number to invisibly tell when an
object was last replicated, and if any changes have been made to the
object since it was last replicated. An object's version number indicates
the last time an object was modified. It is the database version at the moment
of the modification. </p>
<span name="cs_wiki_filter" csw_filters="cs">
<div class="FormattedSourceCode"><div class="fscHeader"><span class="fscFileName">ReplicationExample.cs: <span class="fscMemberName">ConfigureReplication</span></span></div><div class="fscCode"><pre ID="....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplication_1061_80"><div><!--
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--><span style="color: #008080;">1</span><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/None.gif" align="top"/><span style="color: #0000FF;">public</span><span style="color: #000000;"> </span><span style="color: #0000FF;">static</span><span style="color: #000000;"> </span><span style="color: #0000FF;">void</span><span style="color: #000000;"> ConfigureReplication()
</span><span style="color: #008080;">2</span><span style="color: #000000;"><img id="....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplication_1061_80_50_216_Open_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedBlockStart.gif" align="top" onClick="this.style.display='none'; document.getElementById('....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplication_1061_80_50_216_Open_Text').style.display='none'; document.getElementById('....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplication_1061_80_50_216_Closed_Image').style.display='inline'; document.getElementById('....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplication_1061_80_50_216_Closed_Text').style.display='inline';"/><img id="....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplication_1061_80_50_216_Closed_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ContractedBlock.gif" align="top" style="display: none;" onClick="this.style.display='none'; document.getElementById('....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplication_1061_80_50_216_Closed_Text').style.display='none'; document.getElementById('....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplication_1061_80_50_216_Open_Image').style.display='inline'; document.getElementById('....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplication_1061_80_50_216_Open_Text').style.display='inline';"/> </span><span id="....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplication_1061_80_50_216_Closed_Text" style="border: solid 1px #808080; background-color: #FFFFFF; display: none;">...</span><span id="....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplication_1061_80_50_216_Open_Text"><span style="color: #000000;">{
</span><span style="color: #008080;">3</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/> Db4oFactory.Configure().GenerateUUIDs(ConfigScope.GLOBALLY);
</span><span style="color: #008080;">4</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/> Db4oFactory.Configure().GenerateVersionNumbers(ConfigScope.GLOBALLY);
</span><span style="color: #008080;">5</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedBlockEnd.gif" align="top"/> }</span></span></div></pre></div></div>
</span>
<span name="cs_wiki_filter" csw_filters="vb">
<div class="FormattedSourceCode"><div class="fscHeader"><span class="fscFileName">ReplicationExample.vb: <span class="fscMemberName">ConfigureReplication</span></span></div><div class="fscCode"><pre ID="....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplication_1205_80"><div><!--
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--><span style="color: #008080;">1</span><img id="....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplication_1205_80_14_209_Open_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedBlockStart.gif" align="top" onClick="this.style.display='none'; document.getElementById('....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplication_1205_80_14_209_Open_Text').style.display='none'; document.getElementById('....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplication_1205_80_14_209_Closed_Image').style.display='inline'; document.getElementById('....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplication_1205_80_14_209_Closed_Text').style.display='inline';"/><img id="....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplication_1205_80_14_209_Closed_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ContractedBlock.gif" align="top" style="display: none;" onClick="this.style.display='none'; document.getElementById('....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplication_1205_80_14_209_Closed_Text').style.display='none'; document.getElementById('....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplication_1205_80_14_209_Open_Image').style.display='inline'; document.getElementById('....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplication_1205_80_14_209_Open_Text').style.display='inline';"/><span style="color: #0000FF;">Public</span><span style="color: #000000;"> </span><span style="color: #0000FF;">Shared</span><span style="color: #000000;"> </span><span id="....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplication_1205_80_14_209_Closed_Text" style="border: solid 1px #808080; background-color: #FFFFFF; display: none;">Sub ConfigureReplication()</span><span id="....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplication_1205_80_14_209_Open_Text"><span style="color: #0000FF;">Sub</span><span style="color: #000000;"> ConfigureReplication()
</span><span style="color: #008080;">2</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/> Db4oFactory.Configure().GenerateUUIDs(ConfigScope.GLOBALLY)
</span><span style="color: #008080;">3</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/> Db4oFactory.Configure().GenerateVersionNumbers(ConfigScope.GLOBALLY)
</span><span style="color: #008080;">4</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedBlockEnd.gif" align="top"/> </span><span style="color: #0000FF;">End Sub</span></span></div></pre></div></div>
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<p>The above settings can also be applied to a specific class
object, which needs to be replicated. This can help to improve the performance
if only selected classes need to be replicated:</p>
<span name="cs_wiki_filter" csw_filters="cs">
<div class="FormattedSourceCode"><div class="fscHeader"><span class="fscFileName">ReplicationExample.cs: <span class="fscMemberName">ConfigureReplicationPilot</span></span></div><div class="fscCode"><pre ID="....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplicationPilot_1551_85"><div><!--
Code highlighting produced by Actipro CodeHighlighter (freeware)
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--><span style="color: #008080;">1</span><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/None.gif" align="top"/><span style="color: #0000FF;">public</span><span style="color: #000000;"> </span><span style="color: #0000FF;">static</span><span style="color: #000000;"> </span><span style="color: #0000FF;">void</span><span style="color: #000000;"> ConfigureReplicationPilot()
</span><span style="color: #008080;">2</span><span style="color: #000000;"><img id="....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplicationPilot_1551_85_55_243_Open_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedBlockStart.gif" align="top" onClick="this.style.display='none'; document.getElementById('....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplicationPilot_1551_85_55_243_Open_Text').style.display='none'; document.getElementById('....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplicationPilot_1551_85_55_243_Closed_Image').style.display='inline'; document.getElementById('....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplicationPilot_1551_85_55_243_Closed_Text').style.display='inline';"/><img id="....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplicationPilot_1551_85_55_243_Closed_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ContractedBlock.gif" align="top" style="display: none;" onClick="this.style.display='none'; document.getElementById('....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplicationPilot_1551_85_55_243_Closed_Text').style.display='none'; document.getElementById('....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplicationPilot_1551_85_55_243_Open_Image').style.display='inline'; document.getElementById('....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplicationPilot_1551_85_55_243_Open_Text').style.display='inline';"/> </span><span id="....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplicationPilot_1551_85_55_243_Closed_Text" style="border: solid 1px #808080; background-color: #FFFFFF; display: none;">...</span><span id="....ReplicationCS.ZipsReplicationExample.Cs_ReplicationExample.Cs_ConfigureReplicationPilot_1551_85_55_243_Open_Text"><span style="color: #000000;">{
</span><span style="color: #008080;">3</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/> Db4oFactory.Configure().ObjectClass(</span><span style="color: #0000FF;">typeof</span><span style="color: #000000;">(Pilot)).GenerateUUIDs(</span><span style="color: #0000FF;">true</span><span style="color: #000000;">);
</span><span style="color: #008080;">4</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/> Db4oFactory.Configure().ObjectClass(</span><span style="color: #0000FF;">typeof</span><span style="color: #000000;">(Pilot)).GenerateVersionNumbers(</span><span style="color: #0000FF;">true</span><span style="color: #000000;">);
</span><span style="color: #008080;">5</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedBlockEnd.gif" align="top"/> }</span></span></div></pre></div></div>
</span>
<span name="cs_wiki_filter" csw_filters="vb">
<div class="FormattedSourceCode"><div class="fscHeader"><span class="fscFileName">ReplicationExample.vb: <span class="fscMemberName">ConfigureReplicationPilot</span></span></div><div class="fscCode"><pre ID="....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplicationPilot_1700_85"><div><!--
Code highlighting produced by Actipro CodeHighlighter (freeware)
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--><span style="color: #008080;">1</span><img id="....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplicationPilot_1700_85_14_238_Open_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedBlockStart.gif" align="top" onClick="this.style.display='none'; document.getElementById('....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplicationPilot_1700_85_14_238_Open_Text').style.display='none'; document.getElementById('....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplicationPilot_1700_85_14_238_Closed_Image').style.display='inline'; document.getElementById('....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplicationPilot_1700_85_14_238_Closed_Text').style.display='inline';"/><img id="....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplicationPilot_1700_85_14_238_Closed_Image" src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ContractedBlock.gif" align="top" style="display: none;" onClick="this.style.display='none'; document.getElementById('....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplicationPilot_1700_85_14_238_Closed_Text').style.display='none'; document.getElementById('....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplicationPilot_1700_85_14_238_Open_Image').style.display='inline'; document.getElementById('....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplicationPilot_1700_85_14_238_Open_Text').style.display='inline';"/><span style="color: #0000FF;">Public</span><span style="color: #000000;"> </span><span style="color: #0000FF;">Shared</span><span style="color: #000000;"> </span><span id="....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplicationPilot_1700_85_14_238_Closed_Text" style="border: solid 1px #808080; background-color: #FFFFFF; display: none;">Sub ConfigureReplicationPilot()</span><span id="....ReplicationVB.ZipsReplicationExample.Vb_ReplicationExample.Vb_ConfigureReplicationPilot_1700_85_14_238_Open_Text"><span style="color: #0000FF;">Sub</span><span style="color: #000000;"> ConfigureReplicationPilot()
</span><span style="color: #008080;">2</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/> Db4oFactory.Configure().ObjectClass(</span><span style="color: #0000FF;">GetType</span><span style="color: #000000;">(Pilot)).GenerateUUIDs(</span><span style="color: #0000FF;">True</span><span style="color: #000000;">)
</span><span style="color: #008080;">3</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/InBlock.gif" align="top"/> Db4oFactory.Configure().ObjectClass(</span><span style="color: #0000FF;">GetType</span><span style="color: #000000;">(Pilot)).GenerateVersionNumbers(</span><span style="color: #0000FF;">True</span><span style="color: #000000;">)
</span><span style="color: #008080;">4</span><span style="color: #000000;"><img src="../../../Utility/ActiPro.CodeHighligher/OutliningIndicators/ExpandedBlockEnd.gif" align="top"/> </span><span style="color: #0000FF;">End Sub</span></span></div></pre></div></div>
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This revision (1) was last Modified 2007-07-08T21:16:16 by Tetyana.
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