org.neo4j.jdbc.Warnings Maven / Gradle / Ivy
/*
* Copyright (c) 2023-2024 "Neo4j,"
* Neo4j Sweden AB [https://neo4j.com]
*
* This file is part of Neo4j.
*
* 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
*
* https://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.neo4j.jdbc;
import java.sql.SQLWarning;
import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
import java.util.function.Consumer;
/**
* A holder for mutable {@link SQLWarning SQL warnings}.
*
* @author Michael J. Simons
*/
class Warnings implements Consumer {
private static final AtomicReferenceFieldUpdater UPDATER = AtomicReferenceFieldUpdater
.newUpdater(Warnings.class, SQLWarning.class, "value");
private volatile SQLWarning value;
@Override
public void accept(SQLWarning warning) {
if (UPDATER.compareAndSet(this, null, warning)) {
return;
}
this.value.setNextWarning(warning);
}
SQLWarning get() {
return this.value;
}
void clear() {
UPDATER.compareAndSet(this, this.value, null);
}
}