/*
 * 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.solr.search;

import org.apache.lucene.util.TestUtil;
import org.apache.solr.SolrTestCaseJ4;

import org.apache.solr.metrics.MetricsMap;
import org.apache.solr.metrics.SolrMetricManager;
import org.junit.BeforeClass;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.lang.invoke.MethodHandles;
import java.util.Map;
import java.util.Random;

public class TestSolrFieldCacheBean extends SolrTestCaseJ4 {

  private static final Logger log = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());

  @BeforeClass
  public static void beforeClass() throws Exception {
    initCore("solrconfig.xml","schema-minimal.xml");
  }

  @Test
  public void testEntryList() throws Exception {
    // ensure entries to FieldCache
    assertU(adoc("id", "id0"));
    assertU(commit());
    assertQ(req("q", "*:*", "sort", "id asc"), "//*[@numFound='1']");

    // Test with entry list enabled
    assertEntryListIncluded(false);

    // Test again with entry list disabled
    System.setProperty("disableSolrFieldCacheMBeanEntryList", "true");
    try {
      assertEntryListNotIncluded(false);
    } finally {
      System.clearProperty("disableSolrFieldCacheMBeanEntryList");
    }

    // Test with entry list enabled for jmx
    assertEntryListIncluded(true);

    // Test with entry list disabled for jmx
    System.setProperty("disableSolrFieldCacheMBeanEntryListJmx", "true");
    try {
      assertEntryListNotIncluded(true);
    } finally {
      System.clearProperty("disableSolrFieldCacheMBeanEntryListJmx");
    }
  }

  private void assertEntryListIncluded(boolean checkJmx) {
    SolrFieldCacheBean mbean = new SolrFieldCacheBean();
    Random r = random();
    String registryName = TestUtil.randomSimpleString(r, 1, 10);
    SolrMetricManager metricManager = h.getCoreContainer().getMetricManager();
    mbean.initializeMetrics(metricManager, registryName, null);
    MetricsMap metricsMap = (MetricsMap)metricManager.registry(registryName).getMetrics().get("CACHE.fieldCache");
    Map<String, Object> metrics = checkJmx ? metricsMap.getValue(true) : metricsMap.getValue();
    assertTrue(((Number)metrics.get("entries_count")).longValue() > 0);
    assertNotNull(metrics.get("total_size"));
    assertNotNull(metrics.get("entry#0"));
  }

  private void assertEntryListNotIncluded(boolean checkJmx) {
    SolrFieldCacheBean mbean = new SolrFieldCacheBean();
    Random r = random();
    String registryName = TestUtil.randomSimpleString(r, 1, 10);
    SolrMetricManager metricManager = h.getCoreContainer().getMetricManager();
    mbean.initializeMetrics(metricManager, registryName, null);
    MetricsMap metricsMap = (MetricsMap)metricManager.registry(registryName).getMetrics().get("CACHE.fieldCache");
    Map<String, Object> metrics = checkJmx ? metricsMap.getValue(true) : metricsMap.getValue();
    assertTrue(((Number)metrics.get("entries_count")).longValue() > 0);
    assertNull(metrics.get("total_size"));
    assertNull(metrics.get("entry#0"));
  }
}