package org.jgroups.protocols.tom;
import org.jgroups.Address;
import org.jgroups.util.Bits;
import org.jgroups.util.SizeStreamable;
import org.jgroups.util.Util;
import java.io.DataInput;
import java.io.DataOutput;
/**
* The represents an unique identifier for the messages processed by the Total Order Anycast protocol
* <p/>
* Note: it is similar to the ViewId (address + counter)
*
* @author Pedro Ruivo
* @since 3.1
*/
public class MessageID implements Comparable<MessageID>, Cloneable, SizeStreamable {
private Address address = null;
private long id = -1;
public MessageID() {}
public MessageID(Address address, long id) {
this.address = address;
this.id = id;
}
@Override
public int compareTo(MessageID other) {
if (other == null) {
throw new NullPointerException();
}
return id == other.id ? this.address.compareTo(other.address) :
id < other.id ? -1 : 1;
}
public Address getAddress() {
return address;
}
@Override
public String toString() {
return "MessageID{" + address + ":" + id + "}";
}
public Object clone() {
try {
MessageID dolly = (MessageID) super.clone();
dolly.address = address;
return dolly;
} catch (CloneNotSupportedException e) {
throw new IllegalStateException();
}
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
MessageID messageID = (MessageID) o;
return id == messageID.id &&
!(address != null ? !address.equals(messageID.address) : messageID.address != null);
}
@Override
public int hashCode() {
int result = address != null ? address.hashCode() : 0;
result = 31 * result + (int) (id ^ (id >>> 32));
return result;
}
public int serializedSize() {
return Bits.size(id) + Util.size(address);
}
@Override
public void writeTo(DataOutput out) throws Exception {
Util.writeAddress(address, out);
Bits.writeLong(id, out);
}
@Override
public void readFrom(DataInput in) throws Exception {
address = Util.readAddress(in);
id = Bits.readLong(in);
}
}