int protoVersion; // protocol version
int port; // port to contact
java.lang.String[] groups; // groups of interest (e.g., printing)
net.jini.core.lookup.ServiceID[] heard; // os servidores já conhecidos
java.io.ByteArrayOutputStream byteStr = new java.io.ByteArrayOutputStream();
java.io.DataOutputStream objStr = new java.io.DataOutputStream(byteStr);
objStr.writeInt(protoVersion);
objStr.writeInt(port);
objStr.writeInt(heard.length);
for (int i = 0; i < heard.length; i++) {
heard[i].writeBytes(objStr);
}
objStr.writeInt(groups.length);
for (int i = 0; i < groups.length; i++) {
objStr.writeUTF(groups[i]);
}
byte[] packetBody = byteStr.toByteArray(); // the final result
public class ServiceItem implements Serializable {
public ServiceItem(ServiceID serviceID,
Object service,
Entry[] attributeSets) {...}
public ServiceID serviceID;
public Object service;
public Entry[] attributeSets;
}
public interface ServiceRegistrar {
ServiceRegistration register(ServiceItem item,
long leaseDuration)
throws RemoteException;
Object lookup(ServiceTemplate tmpl)
throws RemoteException;
ServiceMatches lookup(ServiceTemplate tmpl, int maxMatches)
throws RemoteException;
int TRANSITION_MATCH_NOMATCH = 1 << 0;
int TRANSITION_NOMATCH_MATCH = 1 << 1;
int TRANSITION_MATCH_MATCH = 1 << 2;
EventRegistration notify(ServiceTemplate tmpl,
int transitions,
RemoteEventListener listener,
MarshalledObject handback,
long leaseDuration)
throws RemoteException;
Class[] getEntryClasses(ServiceTemplate tmpl)
throws RemoteException;
Object[] getFieldValues(ServiceTemplate tmpl,
int setIndex,
String field)
throws NoSuchFieldException, RemoteException;
Class[] getServiceTypes(ServiceTemplate tmpl,
String prefix)
throws RemoteException;
ServiceID getServiceID();
LookupLocator getLocator() throws RemoteException;
String[] getGroups() throws RemoteException;
}
package net.jini.core.lease;
import java.rmi.RemoteException;
public interface Lease { long FOREVER = Long.MAX_VALUE; long ANY = -1;
int DURATION = 1; // os dois possíveis formatos da seriação
int ABSOLUTE = 2; // absolute dá problema se relógios não são sincronizados
long getExpiration(); void cancel() throws UnknownLeaseException, RemoteException; void renew(long duration) throws LeaseDeniedException, UnknownLeaseException, RemoteException; void setSerialFormat(int format);
int getSerialFormat(); LeaseMap createLeaseMap(long duration); // usado para renovações em batch
boolean canBatch(Lease lease); }
