/*
 * 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.amoro.server.table;

import org.apache.amoro.ServerTableIdentifier;
import org.apache.amoro.metrics.Metric;
import org.apache.amoro.metrics.MetricDefine;
import org.apache.amoro.metrics.MetricKey;
import org.apache.amoro.metrics.MetricRegistry;
import org.apache.amoro.shade.guava32.com.google.common.collect.ImmutableMap;
import org.apache.amoro.shade.guava32.com.google.common.collect.Lists;

import java.util.List;

public abstract class AbstractTableMetrics {
  protected final ServerTableIdentifier identifier;
  protected final List<MetricKey> registeredMetricKeys = Lists.newArrayList();
  protected MetricRegistry globalRegistry;

  protected AbstractTableMetrics(ServerTableIdentifier identifier) {
    this.identifier = identifier;
  }

  protected void registerMetric(MetricRegistry registry, MetricDefine define, Metric metric) {
    MetricKey key =
        registry.register(
            define,
            ImmutableMap.of(
                "catalog",
                identifier.getCatalog(),
                "database",
                identifier.getDatabase(),
                "table",
                identifier.getTableName()),
            metric);
    registeredMetricKeys.add(key);
  }

  public void register(MetricRegistry registry) {
    if (globalRegistry == null) {
      registerMetrics(registry);
      globalRegistry = registry;
    }
  }

  public void unregister() {
    if (globalRegistry != null) {
      registeredMetricKeys.forEach(globalRegistry::unregister);
      registeredMetricKeys.clear();
      globalRegistry = null;
    }
  }

  protected abstract void registerMetrics(MetricRegistry registry);
}
