google-nomulus/java/google/registry/util/CapturingLogHandler.java

// Copyright 2017 The Nomulus Authors. All Rights Reserved.
//
// 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
//
//     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 google.registry.util;

import com.google.common.collect.Iterables;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Handler;
import java.util.logging.LogRecord;
import javax.annotation.Nullable;

/** A log handler that captures logs. */
public final class CapturingLogHandler extends Handler {

  private final List<LogRecord> records = new ArrayList<>();

  @Override
  public void publish(@Nullable LogRecord record) {
    if (record != null) {
      records.add(record);
    }
  }

  @Override
  public void flush() {}

  @Override
  public void close() {}

  public Iterable<LogRecord> getRecords() {
    return Iterables.unmodifiableIterable(records);
  }
}