com.hazelcast.client.util.AbstractLoadBalancer Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2015, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.client.util;
import com.hazelcast.client.LoadBalancer;
import com.hazelcast.client.config.ClientConfig;
import com.hazelcast.core.Cluster;
import com.hazelcast.core.InitialMembershipEvent;
import com.hazelcast.core.InitialMembershipListener;
import com.hazelcast.core.Member;
import com.hazelcast.core.MemberAttributeEvent;
import com.hazelcast.core.MembershipEvent;
import java.util.Set;
import java.util.concurrent.atomic.AtomicReference;
/**
* An abstract {@link com.hazelcast.client.LoadBalancer} implementation.
*/
public abstract class AbstractLoadBalancer implements LoadBalancer, InitialMembershipListener {
private final AtomicReference membersRef = new AtomicReference(new Member[]{});
private volatile Cluster clusterRef;
@Override
public final void init(Cluster cluster, ClientConfig config) {
this.clusterRef = cluster;
cluster.addMembershipListener(this);
}
private void setMembersRef() {
Set memberSet = clusterRef.getMembers();
Member[] members = memberSet.toArray(new Member[memberSet.size()]);
membersRef.set(members);
}
protected Member[] getMembers() {
return membersRef.get();
}
@Override
public final void init(InitialMembershipEvent event) {
setMembersRef();
}
@Override
public final void memberAdded(MembershipEvent membershipEvent) {
setMembersRef();
}
@Override
public final void memberRemoved(MembershipEvent membershipEvent) {
setMembersRef();
}
@Override
public final void memberAttributeChanged(MemberAttributeEvent memberAttributeEvent) {
}
}