SDN Controller Programming Guide

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Figure 17 Message Factory Class Diagram
The other factories that a developer might use are:
 MatchFactory—creates matches, used in FlowMods
 FieldFactory—creates match fields, used in Matches
 InstructionFactory—creates instructions for FlowMods
 ActionFactory—creates actions for instructions, (1.0 flowmods), and group buckets
 PortFactory—creates port descriptions
 Note that there are “reserved” values (special port numbers) defined on the Port class
(MAX, IN_PORT, TABLE, NORMAL, FLOOD, ALL, CONTROLLER, LOCAL, ANY)—see
com.hp.of.lib.msg.Port Javadocs
 QueueFactory—creates queue descriptions
 MeterBandFactory—creates meter bands, used in MeterMod messages
 BucketFactory—creates buckets, used in GroupMod messages
 TableFeatureFactory—creates table feature descriptions
Note that application developers should not ever need to invoke “parse” or “encode” methods on
any of the factories; those methods are reserved for use by the Core Controller.
An example: creating a FlowMod message
The following listing shows an example of how to create a flowmod message:
Flowmod Message Example:
public class SampleFlowModMessageCreation {
private static final ProtocolVersion PV = ProtocolVersion.V_1_3;
private static final long COOKIE = 0x00002468;
private static final TableId TABLE_ID = TableId.valueOf(200);