content: /*
   * 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.beam.runners.dataflow.worker;
  
  import java.util.Collection;
  import java.util.concurrent.ConcurrentLinkedDeque;
  import java.util.logging.Handler;
  import java.util.logging.LogRecord;
  import javax.annotation.concurrent.ThreadSafe;
  
  /** A JUL logging {@link Handler} that records all logging events that are passed to it. */
  @ThreadSafe
  public class LogSaver extends Handler {
    private final Collection<LogRecord> logRecords = new ConcurrentLinkedDeque<>();
  
    public Collection<LogRecord> getLogs() {
      return logRecords;
    }
  
    @Override
    public void publish(LogRecord record) {
      logRecords.add(record);
    }
  
    @Override
    public void flush() {}
  
    @Override
    public void close() throws SecurityException {}
  }
  