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.activemq.artemis.tests.util;
  
  import org.apache.activemq.artemis.json.JsonArray;
  import org.apache.activemq.artemis.json.JsonObject;
  import javax.management.MBeanServerInvocationHandler;
  import javax.management.ObjectName;
  import javax.management.remote.JMXConnector;
  import javax.management.remote.JMXConnectorFactory;
  import javax.management.remote.JMXServiceURL;
  import java.io.StringReader;
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Objects;
  import java.util.Optional;
  import java.util.function.Function;
  import java.util.function.Predicate;
  import java.util.stream.Stream;
  
  import org.apache.activemq.artemis.api.core.Pair;
  import org.apache.activemq.artemis.api.core.management.ActiveMQServerControl;
  import org.apache.activemq.artemis.api.core.management.ObjectNameBuilder;
  import org.apache.activemq.artemis.utils.JsonLoader;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import java.lang.invoke.MethodHandles;
  
  
  public class Jmx {
  
     private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
  
     @FunctionalInterface
     public interface ThrowableFunction<T, R> {
  
        R apply(T t) throws Throwable;
     }
  
     private static <C, T> Optional<T> queryControl(JMXServiceURL serviceURI,
                                                    ObjectName objectName,
                                                    ThrowableFunction<C, T> queryControl,
                                                    Class<C> controlClass,
                                                    Function<Throwable, T> onThrowable) {
        try {
           try (JMXConnector jmx = JMXConnectorFactory.connect(serviceURI)) {
              final C control = MBeanServerInvocationHandler.newProxyInstance(jmx.getMBeanServerConnection(), objectName, controlClass, false);
              return Optional.ofNullable(queryControl.apply(control));
           }
        } catch (Throwable t) {
           return Optional.ofNullable(onThrowable.apply(t));
        }
     }
  
     public static Optional<Boolean> isReplicaSync(JMXServiceURL serviceURI, ObjectNameBuilder builder) throws Exception {
        return queryControl(serviceURI, builder.getActiveMQServerObjectName(), ActiveMQServerControl::isReplicaSync, ActiveMQServerControl.class, throwable -> null);
     }
  
     public static Optional<Boolean> isBackup(JMXServiceURL serviceURI, ObjectNameBuilder builder) throws Exception {
        return queryControl(serviceURI, builder.getActiveMQServerObjectName(), ActiveMQServerControl::isBackup, ActiveMQServerControl.class, throwable -> null);
     }
  
     public static Optional<String> getNodeID(JMXServiceURL serviceURI, ObjectNameBuilder builder) throws Exception {
        return queryControl(serviceURI, builder.getActiveMQServerObjectName(), ActiveMQServerControl::getNodeID, ActiveMQServerControl.class, throwable -> null);
     }
  
     public static Optional<Long> getActivationSequence(JMXServiceURL serviceURI, ObjectNameBuilder builder) throws Exception {
        return queryControl(serviceURI, builder.getActiveMQServerObjectName(), ActiveMQServerControl::getActivationSequence, ActiveMQServerControl.class, throwable -> null);
  
     }
  
     public static Optional<Boolean> isActive(JMXServiceURL serviceURI, ObjectNameBuilder builder) throws Exception {
        return queryControl(serviceURI, builder.getActiveMQServerObjectName(), ActiveMQServerControl::isActive, ActiveMQServerControl.class, throwable -> null);
  
     }
  
     public static Optional<String> listNetworkTopology(JMXServiceURL serviceURI,
                                                         ObjectNameBuilder builder) throws Exception {
        return queryControl(serviceURI, builder.getActiveMQServerObjectName(), ActiveMQServerControl::listNetworkTopology, ActiveMQServerControl.class, throwable -> null);
     }
  
     public static Map<String, Pair<String, String>> decodeNetworkTopologyJson(String networkTopologyJson) {
        if (networkTopologyJson == null || networkTopologyJson.isEmpty()) {
           return Collections.emptyMap();
        }
        final JsonArray nodeIDs = JsonLoader.readArray(new StringReader(networkTopologyJson));
        final int nodeCount = nodeIDs.size();
        Map<String, Pair<String, String>> networkTopology = new HashMap<>(nodeCount);
        for (int i = 0; i < nodeCount; i++) {
           final JsonObject nodePair = nodeIDs.getJsonObject(i);
           try {
              final String nodeID = nodePair.getString("nodeID");
              final String primary = Objects.requireNonNullElse(nodePair.getString("primary"), nodePair.getString("live"));
              final String backup = nodePair.getString("backup", null);
              networkTopology.put(nodeID, new Pair<>(primary, backup));
           } catch (Exception e) {
              logger.warn("Error on {}", nodePair, e);
           }
        }
        return networkTopology;
     }
  
     private static long countMembers(Map<String, Pair<String, String>> networkTopology) {
        final long count = networkTopology.values().stream()
           .map(Pair::getA).filter(primary -> primary != null && !primary.isEmpty())
           .count();
        return count;
     }
  
     private static long countNodes(Map<String, Pair<String, String>> networkTopology) {
        final long count =  networkTopology.values().stream()
           .flatMap(pair -> Stream.of(pair.getA(), pair.getB()))
           .filter(primaryOrBackup -> primaryOrBackup != null && !primaryOrBackup.isEmpty())
           .count();
        return count;
     }
  
     public static boolean validateNetworkTopology(String networkTopologyJson,
                                                    Predicate<Map<String, Pair<String, String>>> checkTopology) {
        final Map<String, Pair<String, String>> networkTopology = decodeNetworkTopologyJson(networkTopologyJson);
        return checkTopology.test(networkTopology);
     }
  
     public static String backupOf(String nodeID, Map<String, Pair<String, String>> networkTopology) {
        return networkTopology.get(nodeID).getB();
     }
  
     public static String primaryOf(String nodeID, Map<String, Pair<String, String>> networkTopology) {
        return networkTopology.get(nodeID).getA();
     }
  
     public static Predicate<Map<String, Pair<String, String>>> containsExactNodeIds(String... nodeID) {
        Objects.requireNonNull(nodeID);
        return topology -> topology.size() == nodeID.length && Stream.of(nodeID).allMatch(topology::containsKey);
     }
  
     public static Predicate<Map<String, Pair<String, String>>> withMembers(int count) {
        return topology -> countMembers(topology) == count;
     }
  
     public static Predicate<Map<String, Pair<String, String>>> withNodes(int count) {
        return topology -> countNodes(topology) == count;
     }
  
     public static Predicate<Map<String, Pair<String, String>>> withBackup(String nodeId, Predicate<String> compare) {
        return topology -> compare.test(backupOf(nodeId, topology));
     }
  
     public static Predicate<Map<String, Pair<String, String>>> withPrimary(String nodeId, Predicate<String> compare) {
        return topology -> compare.test(primaryOf(nodeId, topology));
     }
  }
  