org.jgroups.protocols.SHARED_LOOPBACK_PING Maven / Gradle / Ivy
package org.jgroups.protocols;
import org.jgroups.Address;
import org.jgroups.Event;
import org.jgroups.util.Responses;
import java.util.List;
/**
* Discovery protocol running over {@link SHARED_LOOPBACK} only. Doesn't send discovery requests and responses, but
* fetches discovery information directly from SHARED_LOOPBACK. Used mainly by unit test.
* @author Bela Ban
* @since 3.5
*/
public class SHARED_LOOPBACK_PING extends Discovery {
public void init() throws Exception {
super.init();
TP tmp=getTransport();
if(!(tmp instanceof SHARED_LOOPBACK))
throw new IllegalStateException("the transport must be " + SHARED_LOOPBACK.class.getSimpleName());
if(tmp.isSingleton())
throw new IllegalStateException("shared transports are not supported by " + SHARED_LOOPBACK_PING.class.getSimpleName());
}
public boolean isDynamic() {
return true;
}
@Override
public void findMembers(List members, boolean initial_discovery, Responses responses) {
num_discovery_requests++;
List retval=(List)down_prot.down(new Event(Event.GET_PING_DATA, cluster_name));
if(retval != null)
for(PingData data: retval) {
if(!data.getAddress().equals(local_addr))
responses.addResponse(data, false);
}
responses.done(); // so waitFor() doesn't block at all
}
}