import org.projectfloodlight.openflow.util.LRULinkedHashMap; //导入依赖的package包/类
/**
 * Adds a host to the MAC/VLAN->SwitchPort mapping
 * @param sw The switch to add the mapping to
 * @param mac The MAC address of the host to add
 * @param vlan The VLAN that the host is on
 * @param portVal The switchport that the host is on
 */
protected void addToPortMap(IOFSwitch sw, MacAddress mac, VlanVid vlan, OFPort portVal) {
    Map<MacVlanPair, OFPort> swMap = macVlanToSwitchPortMap.get(sw);

    if (vlan == VlanVid.FULL_MASK) {
        // OFMatch.loadFromPacket sets VLAN ID to 0xffff if the packet contains no VLAN tag;
        // for our purposes that is equivalent to the default VLAN ID 0
        vlan = VlanVid.ofVlan(0);
    }

    if (swMap == null) {
        // May be accessed by REST API so we need to make it thread safe
        swMap = Collections.synchronizedMap(new LRULinkedHashMap<MacVlanPair, OFPort>(MAX_MACS_PER_SWITCH));
        macVlanToSwitchPortMap.put(sw, swMap);
    }
    swMap.put(new MacVlanPair(mac, vlan), portVal);
}
 

import org.projectfloodlight.openflow.util.LRULinkedHashMap; //导入依赖的package包/类
/**
 * Adds a host to the MAC/VLAN->SwitchPort mapping
 * @param sw The switch to add the mapping to
 * @param mac The MAC address of the host to add
 * @param vlan The VLAN that the host is on
 * @param portVal The switchport that the host is on
 */
protected void addToPortMap(IOFSwitch sw, MacAddress mac, VlanVid vlan, OFPort portVal) {
	Map<MacVlanPair, OFPort> swMap = macVlanToSwitchPortMap.get(sw);

	if (vlan == VlanVid.FULL_MASK || vlan == null) {
		vlan = VlanVid.ofVlan(0);
	}

	if (swMap == null) {
		// May be accessed by REST API so we need to make it thread safe
		swMap = Collections.synchronizedMap(new LRULinkedHashMap<MacVlanPair, OFPort>(MAX_MACS_PER_SWITCH));
		macVlanToSwitchPortMap.put(sw, swMap);
	}
	swMap.put(new MacVlanPair(mac, vlan), portVal);
}