package io.eguan.dtx.events;
/*
* #%L
* Project eguan
* %%
* Copyright (C) 2012 - 2017 Oodrive
* %%
* 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.
* #L%
*/
import io.eguan.dtx.DtxManager;
import io.eguan.dtx.DtxNode;
import java.util.Objects;
import javax.annotation.ParametersAreNonnullByDefault;
/**
* An event relating to any DTX cluster node.
*
* @author oodrive
* @author pwehrle
*
*/
public final class DtxClusterEvent extends DtxEvent<DtxManager> {
/**
* Cluster membership event types.
*
*
*/
public enum DtxClusterEventType {
/**
* Type used whenever a new registered node comes online.
*/
ADDED,
/**
* Type used when a registered node goes offline.
*/
REMOVED;
}
private final DtxClusterEventType type;
private final DtxNode node;
/**
* Constructs an event relating to any DTX cluster node.
*
* @param source
* the {@link DtxManager} triggering the event
* @param type
* the {@link DtxClusterEventType} describing the event
* @param node
* the affected {@link DtxNode}
* @param quorumOnline
* <code>true</code> if the quorum is online after the event occurred, <code>false</code> otherwise
* @throws NullPointerException
* if any argument is <code>null</code>
*/
@ParametersAreNonnullByDefault
public DtxClusterEvent(final DtxManager source, final DtxClusterEventType type, final DtxNode node,
final boolean quorumOnline) throws NullPointerException {
super(Objects.requireNonNull(source), System.currentTimeMillis());
this.type = Objects.requireNonNull(type);
this.node = Objects.requireNonNull(node);
}
/**
* Gets the type describing the event.
*
* @return a {@link DtxClusterEventType}
*/
public final DtxClusterEventType getType() {
return type;
}
/**
* Gets the node affected by the event.
*
* @return a non-<code>null</code> {@link DtxNode}
*/
public final DtxNode getNode() {
return node;
}
@Override
public final String toString() {
return toStringHelper().add("type", type).add("node", node).toString();
}
}