// Copyright (C) 2015 The Android Open Source Project
//
// 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 com.googlesource.gerrit.plugins.metricsreporterjmx;

import static java.util.stream.Collectors.toList;

import com.codahale.metrics.MetricRegistry;
import com.codahale.metrics.jmx.JmxReporter;
import com.google.gerrit.extensions.annotations.Listen;
import com.google.gerrit.extensions.events.LifecycleListener;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.util.List;
import java.util.function.Predicate;
import java.util.regex.Pattern;

@Listen
@Singleton
public class GerritJmxReporter implements LifecycleListener {
  private final JmxReporter reporter;

  @Inject
  public GerritJmxReporter(MetricRegistry registry, Configuration config) {
    List<Pattern> excludes = config.getExcludes().stream().map(Pattern::compile).collect(toList());
    Predicate<String> exclusionFilter =
        s -> excludes.stream().anyMatch(e -> e.matcher(s).matches());
    this.reporter =
        JmxReporter.forRegistry(registry).filter((n, m) -> !exclusionFilter.test(n)).build();
  }

  @Override
  public void start() {
    reporter.start();
  }

  @Override
  public void stop() {
    reporter.stop();
  }
}