/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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 org.apache.catalina.tribes.group.interceptors;
import org.apache.catalina.tribes.group.ChannelInterceptorBase;
import org.apache.catalina.tribes.Member;
import java.util.ArrayList;
import org.apache.catalina.tribes.group.AbsoluteOrder;
import org.apache.catalina.tribes.ChannelException;
import org.apache.catalina.tribes.Channel;
public class StaticMembershipInterceptor
extends ChannelInterceptorBase {
protected ArrayList<Member> members = new ArrayList<Member>();
protected Member localMember = null;
public StaticMembershipInterceptor() {
super();
}
public void addStaticMember(Member member) {
synchronized (members) {
if (!members.contains(member)) members.add(member);
}
}
public void removeStaticMember(Member member) {
synchronized (members) {
if (members.contains(member)) members.remove(member);
}
}
public void setLocalMember(Member member) {
this.localMember = member;
}
/**
* has members
*/
@Override
public boolean hasMembers() {
return super.hasMembers() || (members.size()>0);
}
/**
* Get all current cluster members
* @return all members or empty array
*/
@Override
public Member[] getMembers() {
if ( members.size() == 0 ) return super.getMembers();
else {
synchronized (members) {
Member[] others = super.getMembers();
Member[] result = new Member[members.size() + others.length];
for (int i = 0; i < others.length; i++) result[i] = others[i];
for (int i = 0; i < members.size(); i++) result[i + others.length] = members.get(i);
AbsoluteOrder.absoluteOrder(result);
return result;
}//sync
}//end if
}
/**
*
* @param mbr Member
* @return Member
*/
@Override
public Member getMember(Member mbr) {
if ( members.contains(mbr) ) return members.get(members.indexOf(mbr));
else return super.getMember(mbr);
}
/**
* Return the member that represents this node.
*
* @return Member
*/
@Override
public Member getLocalMember(boolean incAlive) {
if (this.localMember != null ) return localMember;
else return super.getLocalMember(incAlive);
}
/**
* Send notifications upwards
* @param svc int
* @throws ChannelException
*/
@Override
public void start(int svc) throws ChannelException {
if ( (Channel.SND_RX_SEQ&svc)==Channel.SND_RX_SEQ ) super.start(Channel.SND_RX_SEQ);
if ( (Channel.SND_TX_SEQ&svc)==Channel.SND_TX_SEQ ) super.start(Channel.SND_TX_SEQ);
final Member[] mbrs = members.toArray(new Member[members.size()]);
final ChannelInterceptorBase base = this;
Thread t = new Thread() {
@Override
public void run() {
for (int i=0; i<mbrs.length; i++ ) {
base.memberAdded(mbrs[i]);
}
}
};
t.start();
super.start(svc & (~Channel.SND_RX_SEQ) & (~Channel.SND_TX_SEQ));
}
}