144 lines
4.0 KiB
Java
144 lines
4.0 KiB
Java
/*
|
|
* Copyright 2009 Red Hat, Inc.
|
|
*
|
|
* Red Hat licenses this file to you under the Apache License, version 2.0
|
|
* (the "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at:
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*/
|
|
package io.netty.channel.local;
|
|
|
|
import java.net.SocketAddress;
|
|
|
|
/**
|
|
* An endpoint in the local transport. Each endpoint is identified by a unique
|
|
* case-insensitive string, except for the pre-defined value called
|
|
* {@code "ephemeral"}.
|
|
*
|
|
* <h3>Ephemeral Address</h3>
|
|
*
|
|
* An ephemeral address is an anonymous address which is assigned temporarily
|
|
* and is released as soon as the connection is closed. All ephemeral addresses
|
|
* have the same ID, {@code "ephemeral"}, but they are not equal to each other.
|
|
*
|
|
* @author <a href="http://netty.io/">The Netty Project</a>
|
|
* @author Andy Taylor (andy.taylor@jboss.org)
|
|
* @author <a href="http://gleamynode.net/">Trustin Lee</a>
|
|
*
|
|
* @apiviz.landmark
|
|
*/
|
|
public final class LocalAddress extends SocketAddress implements Comparable<LocalAddress> {
|
|
|
|
private static final long serialVersionUID = -3601961747680808645L;
|
|
|
|
public static final String EPHEMERAL = "ephemeral";
|
|
|
|
private final String id;
|
|
private final boolean ephemeral;
|
|
|
|
/**
|
|
* Creates a new instance with the specified ID.
|
|
*/
|
|
public LocalAddress(int id) {
|
|
this(String.valueOf(id));
|
|
}
|
|
|
|
/**
|
|
* Creates a new instance with the specified ID.
|
|
*/
|
|
public LocalAddress(String id) {
|
|
if (id == null) {
|
|
throw new NullPointerException("id");
|
|
}
|
|
id = id.trim().toLowerCase();
|
|
if (id.length() == 0) {
|
|
throw new IllegalArgumentException("empty id");
|
|
}
|
|
this.id = id;
|
|
ephemeral = id.equals("ephemeral");
|
|
}
|
|
|
|
/**
|
|
* Returns the ID of this address.
|
|
*/
|
|
public String getId() {
|
|
return id;
|
|
}
|
|
|
|
/**
|
|
* Returns {@code true} if and only if this address is ephemeral.
|
|
*/
|
|
public boolean isEphemeral() {
|
|
return ephemeral;
|
|
}
|
|
|
|
@Override
|
|
public int hashCode() {
|
|
if (ephemeral) {
|
|
return System.identityHashCode(this);
|
|
} else {
|
|
return id.hashCode();
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public boolean equals(Object o) {
|
|
if (!(o instanceof LocalAddress)) {
|
|
return false;
|
|
}
|
|
|
|
if (ephemeral) {
|
|
return this == o;
|
|
} else {
|
|
return getId().equals(((LocalAddress) o).getId());
|
|
}
|
|
}
|
|
|
|
// FIXME: This comparison is broken! Assign distinct port numbers for
|
|
// ephemeral ports, just like O/S does for port number 0. It will
|
|
// break backward compatibility though.
|
|
|
|
@Override
|
|
public int compareTo(LocalAddress o) {
|
|
if (ephemeral) {
|
|
if (o.ephemeral) {
|
|
if (this == o){
|
|
return 0;
|
|
}
|
|
|
|
int a = System.identityHashCode(this);
|
|
int b = System.identityHashCode(o);
|
|
if (a < b) {
|
|
return -1;
|
|
} else if (a > b) {
|
|
return 1;
|
|
} else {
|
|
throw new Error(
|
|
"Two different ephemeral addresses have " +
|
|
"same identityHashCode.");
|
|
}
|
|
} else {
|
|
return 1;
|
|
}
|
|
} else {
|
|
if (o.ephemeral) {
|
|
return -1;
|
|
} else {
|
|
return getId().compareTo(o.getId());
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public String toString() {
|
|
return "local:" + getId();
|
|
}
|
|
}
|