Java Reference

In-Depth Information

resource :

ResourceAllocator

provider :

BasicNegotiator

mediator :

Mediator

User

new

prefs :

ResourcePreferences

startNegotiation(client,provide)

book()

preference(prefs)

Figure 20.8
Initialization scenario

resource. Each resource is described by the values of the attributes; such

values can be seen as coordinates in an
n
-dimensional space, thus the

description of a resource is implemented as a
Map
that maps the name of the

attribute (or dimension) into the value of the attribute (or coordinate). In

addition it has two counters that represent the available and the booked

items. Method
match()
matches the coordinates of the resource against a set

of values for the attributes.

package
booking;

import
java.util.*;

class
Resource {

// the description of the resource expressed as

// coordinates in an n-dimensional space, one dimension

// for each attribute.

Map coordinates;

int
available; // number of available resources

int
booked; // number of booked resources

Resource(Map coordinates,
int
available){

this
.coordinates
#
coordinates;

this
.available
#
available;

booked
#
0;

}

// compares the resource coordinates with other

// coordinates