VMware GemFire Native Client C++ API Reference

Implementers of interface FixedPartitionResolver helps to achieve explicit mapping of a "user defined" partition to a data member node.

Geode uses the partition name returned by FixedPartitionResolver#getPartitionName(EntryEvent, std::shared_ptr<CacheableHashSet>) to determine on which member the data is being managed. Say, for example, you want to partition all Trades according to quarters. You can implement FixedPartitionResolver to get the name of the quarter based on the date given as part of EntryEvent.

public class QuarterPartitionResolver implements FixedPartitionResolver{
&nbsp &nbsp public const char* getPartitionName(EntryEvent event, std::shared_ptr<CacheableHashSet> allAvailablePartitions) {
&nbsp &nbsp Date date = sdf.parse((String)opDetails.getKey());
&nbsp &nbsp Calendar cal = Calendar.getInstance();
&nbsp &nbsp cal.setTime(date);
&nbsp &nbsp int month = cal.get(Calendar.MONTH);
&nbsp &nbsp if (month == 0 || month == 1 || month == 2) {
&nbsp &nbsp &nbsp return "Quarter1";
&nbsp &nbsp }
&nbsp &nbsp else if (month == 3 || month == 4 || month == 5) {
&nbsp &nbsp &nbsp return "Quarter2";
&nbsp &nbsp }
&nbsp &nbsp else if (month == 6 || month == 7 || month == 8) {
&nbsp &nbsp &nbsp return "Quarter3";
&nbsp &nbsp }
&nbsp &nbsp else if (month == 9 || month == 10 || month == 11) {
&nbsp &nbsp &nbsp return "Quarter4";
&nbsp &nbsp }
&nbsp &nbsp else {
&nbsp &nbsp &nbsp return "Invalid Quarter";
&nbsp &nbsp }
&nbsp }

See also

PartitionResolver