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A local ObjectGrid can be configured by using an ObjectGrid descriptor XML file or ObjectGrid APIs.
A simple XML example follows: the companyGrid.xml
file. The file is also printed below. The first few lines of the file include the required header for each ObjectGrid XML file. The file defines the CompanyGrid ObjectGrid with Customer, Item, OrderLine, and Order BackingMaps.
<?xml version="1.0" encoding="UTF-8"?>
<objectGridConfig xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://ibm.com/ws/objectgrid/config ../objectGrid.xsd"
xmlns="http://ibm.com/ws/objectgrid/config">
<objectGrids>
<objectGrid name="CompanyGrid">
<backingMap name="Customer" />
<backingMap name="Item" />
<backingMap name="OrderLine" />
<backingMap name="Order" />
</objectGrid>
</objectGrids>
</objectGridConfig>
Pass the XML file to one of the createObjectGrid methods in the ObjectGridManager interface. The following code snippet validates the companyGrid.xml file against the XML schema, and creates the CompanyGrid ObjectGrid. The newly created ObjectGrid instance is not cached.
ObjectGridManager objectGridManager = ObjectGridManagerFactory.getObjectGridManager();
ObjectGrid companyGrid = objectGridManager.createObjectGrid("CompanyGrid", new URL("file:etc/test/companyGrid.xml"), true, false);
As an alternative to using XML, ObjectGrids can be created programmatically. The following code snippet can be used in place of the previous XML and code.
ObjectGridManager objectGridManager = ObjectGridManagerFactory.getObjectGridManager();
ObjectGrid companyGrid = objectGridManager.createObjectGrid ("CompanyGrid", false);
BackingMap customerMap= companyGrid.defineMap("Customer");
BackingMap itemMap= companyGrid.defineMap("Item");
BackingMap orderLineMap= companyGrid.defineMap("OrderLine");
BackingMap orderMap = companyGrid.defineMap("Order");
ObjectGrid has many customizable plug-ins and attributes. For a complete description of the ObjectGrid XML file, see ObjectGrid configuration reference.
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