co.elastic.otel.disruptor.FreezableList Maven / Gradle / Ivy

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/*
 * Licensed to Elasticsearch B.V. under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch B.V. 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 co.elastic.otel.disruptor;

import java.util.ArrayList;
import java.util.List;

public class FreezableList {

  private List list = new ArrayList<>();
  private boolean isFrozen = false;

  public synchronized void addIfNotFrozen(T value) {
    if (isFrozen) {
      return;
    }
    list.add(value);
  }

  public synchronized List freezeAndGet() {
    isFrozen = true;
    return list;
  }
}