apache::geode::client::FixedPartitionResolver Class Reference

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

#include <FixedPartitionResolver.hpp>

Inherits apache::geode::client::PartitionResolver.

Public Member Functions
virtual const std::string &	getName ()
	Returns the name of the PartitionResolver.
virtual const std::string &	getPartitionName (const EntryEvent &opDetails)=0
	public methods
virtual std::shared_ptr< CacheableKey >	getRoutingObject (const EntryEvent &opDetails)=0

Detailed Description

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

Member Function Documentation

getName()

virtual const std::string & apache::geode::client::PartitionResolver::getName ( )

virtualinherited

Returns the name of the PartitionResolver.

Returns

String name

Reimplemented in apache::geode::client::StringPrefixPartitionResolver.

getPartitionName()

virtual const std::string & apache::geode::client::FixedPartitionResolver::getPartitionName ( const EntryEvent &  opDetails )

pure virtual

public methods

This method is used to get the name of the partition for the given entry operation.

Parameters

opDetails

the details of the entry event e.g. Region#get(Object)

Returns

partition-name associated with node which allows mapping of given data to user defined partition

getRoutingObject()

virtual std::shared_ptr< CacheableKey > apache::geode::client::PartitionResolver::getRoutingObject ( const EntryEvent &  opDetails )

pure virtualinherited

Parameters

opDetails

the detail of the entry event

Exceptions

RuntimeException

- any exception thrown will terminate the operation and the exception will be passed to the calling thread.

Returns

object associated with entry event which allows the Partitioned Region to store associated data together

Implemented in apache::geode::client::StringPrefixPartitionResolver.