com.datastax.oss.driver.internal.core.loadbalancing.nodeset.SingleDcNodeSet Maven / Gradle / Ivy
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/*
* 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 com.datastax.oss.driver.internal.core.loadbalancing.nodeset;
import com.datastax.oss.driver.api.core.metadata.Node;
import com.datastax.oss.driver.shaded.guava.common.collect.ImmutableSet;
import edu.umd.cs.findbugs.annotations.NonNull;
import edu.umd.cs.findbugs.annotations.Nullable;
import java.util.Collections;
import java.util.Objects;
import java.util.Set;
import java.util.concurrent.CopyOnWriteArraySet;
import net.jcip.annotations.ThreadSafe;
@ThreadSafe
public class SingleDcNodeSet implements NodeSet {
private final Set nodes = new CopyOnWriteArraySet<>();
private final String dc;
private final Set dcs;
public SingleDcNodeSet(@NonNull String dc) {
this.dc = dc;
dcs = ImmutableSet.of(dc);
}
@Override
public boolean add(@NonNull Node node) {
if (Objects.equals(node.getDatacenter(), dc)) {
return nodes.add(node);
}
return false;
}
@Override
public boolean remove(@NonNull Node node) {
if (Objects.equals(node.getDatacenter(), dc)) {
return nodes.remove(node);
}
return false;
}
@Override
@NonNull
public Set dc(@Nullable String dc) {
if (Objects.equals(this.dc, dc)) {
return nodes;
}
return Collections.emptySet();
}
@Override
public Set dcs() {
return dcs;
}
}