modules/clustering/src/org/apache/axis2/clustering/tribes/Axis2Coordinator.java

/*
 * 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.axis2.clustering.tribes;

import org.apache.axis2.clustering.MembershipListener;
import org.apache.catalina.tribes.Member;
import org.apache.catalina.tribes.group.interceptors.NonBlockingCoordinator;

/**
 * The non-blocking coordinator interceptor
 */
public class Axis2Coordinator extends NonBlockingCoordinator {

    private final MembershipListener membershipListener;

    public Axis2Coordinator(MembershipListener membershipListener) {
        this.membershipListener = membershipListener;
    }

    public void memberAdded(Member member) {
        super.memberAdded(member);
        if (membershipListener != null &&
            TribesUtil.areInSameDomain(getLocalMember(true), member)) {
            membershipListener.memberAdded(TribesUtil.toAxis2Member(member), isCoordinator());
        }
    }

    public void memberDisappeared(Member member) {
        super.memberDisappeared(member);
        if(!TribesUtil.areInSameDomain(getLocalMember(true), member)){
            return;
        }
        if (isCoordinator()) {
            if (TribesUtil.toAxis2Member(member).isActive()) {

                // If the local member is PASSIVE, we try to activate it
                if (!TribesUtil.toAxis2Member(getLocalMember(true)).isActive()) {
                    //TODO: ACTIVATE local member

                } else {
                    Member[] members = getMembers();
                    for (Member aMember : members) {
                        if (!TribesUtil.toAxis2Member(member).isActive()) {
                            // TODO: Send ACTIVATE message to this passive member
                        }
                    }
                }
            } else {
                //TODO If a PASSIVE member disappeared, we may need to startup another
                // passive node
            }
        }
        if (membershipListener != null) {
            membershipListener.memberDisappeared(TribesUtil.toAxis2Member(member), isCoordinator());
        }
    }
}