HP Matrix Operating Environment Software - Manual (Page 61)

• package package-name
• imports
• globals
• functions
• queries
• rules
The order in which the elements are declared is not important, except for the package name. If
you declare a package name, it must be the first element in the rule file.
Example: Rule to verify server memory criteria
package com.hp.hpio.controller.policy;
import java.util.List;
import java.lang.Integer;
import com.hp._2007.ess.sw.model.infrastructureutilityschema.LogicalServer;
import com.hp._2007.ess.sw.model.infrastructureutilityschema.ComputeServer;
import com.hp.hpio.controller.wrapper.LogicalServerWrapper;
import com.hp.hpio.common.messages.HPIOBundleKey;
import com.hp.hpio.common.messages.HPIOMessage;
dialect "java" // Since we are using Java syntax with drools
/*
* INIT should be the first rule in a drl file which inserts service
* entity, resource list and result map into working memory by reading
* from PolicyExecutionVO passed to rule engine.
*
*/
/* DO NOT MODIFY */
rule "INIT"
salience 1000
when
pVO : PolicyExecutionVO();
then
insert(pVO.getAllocationEntry().getServiceEntity());
insert(pVO.getResultMap());
insert(pVO.getResourceList());
end
/*
* Rule to check memory criteria for a given service entity
* (LogicalServer) compared to list of physical resources available
* (ComputeServer)
*
*/
rule "MemorySizeCriteria"
when
$pVO : PolicyExecutionVO( );
$resLst : List();
$logicalServer : LogicalServer();
$computeServer : ComputeServer() from $resLst;
eval(memorySizeCriteria($logicalServer, $computeServer, $pVO));
then
$pVO.match($computeServer, HPIOMessage.get(HPIOBundleKey.ALLOCATION_CRITERIA_MEMORY));
end
function boolean memorySizeCriteria(
LogicalServer logicalServer,
ComputeServer computeServer,
PolicyExecutionVO pVO) {
pVO.doesNotMatch(computeServer,HPIOMessage.get(HPIOBundleKey.ALLOCATION_CRITERIA_MEMORY));
/* -------------- CUSTOM LOGIC ----------------------*/
Integer logicalMemorySizeMB = LogicalServerWrapper.getMemorySizeMi(logicalServer);
if (computeServer.getMemoryConsumedMB() == null) {
computeServer.setMemoryConsumedMB(0);
}
Integer resourceMemorySizeMB = computeServer.getMemorySizeMB() - computeServer.getMemoryConsumedMB();
if(logicalMemorySizeMB.doubleValue() <= resourceMemorySizeMB.doubleValue()){
return true;
Customizable allocation process 61