lucene/test-framework/src/java/org/apache/lucene/index/SuppressingConcurrentMergeScheduler.java

/*
 * 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 org.apache.lucene.index;

/** A {@link ConcurrentMergeScheduler} that ignores AlreadyClosedException. */
public abstract class SuppressingConcurrentMergeScheduler extends ConcurrentMergeScheduler {
  @Override
  protected void handleMergeException(Throwable exc) {
    while (true) {
      if (isOK(exc)) {
        return;
      }
      exc = exc.getCause();
      if (exc == null) {
        super.handleMergeException(exc);
      }
    }
  }

  protected abstract boolean isOK(Throwable t);
}