pzampino commented on a change in pull request #239: KNOX-2153 - CM discovery - Monitor Cloudera Manager URL: https://github.com/apache/knox/pull/239#discussion_r369287300
########## File path: gateway-discovery-cm/src/main/java/org/apache/knox/gateway/topology/discovery/cm/ClouderaManagerClusterConfigurationMonitor.java ########## @@ -0,0 +1,940 @@ +/* + * 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.knox.gateway.topology.discovery.cm; + +import com.cloudera.api.swagger.EventsResourceApi; +import com.cloudera.api.swagger.RolesResourceApi; +import com.cloudera.api.swagger.ServicesResourceApi; +import com.cloudera.api.swagger.client.ApiClient; +import com.cloudera.api.swagger.client.ApiException; +import com.cloudera.api.swagger.model.ApiConfig; +import com.cloudera.api.swagger.model.ApiConfigList; +import com.cloudera.api.swagger.model.ApiEvent; +import com.cloudera.api.swagger.model.ApiEventAttribute; +import com.cloudera.api.swagger.model.ApiEventCategory; +import com.cloudera.api.swagger.model.ApiEventQueryResult; +import com.cloudera.api.swagger.model.ApiRole; +import com.cloudera.api.swagger.model.ApiRoleList; +import com.cloudera.api.swagger.model.ApiServiceConfig; +import org.apache.commons.io.FileUtils; +import org.apache.knox.gateway.config.GatewayConfig; +import org.apache.knox.gateway.i18n.messages.MessagesFactory; +import org.apache.knox.gateway.services.security.AliasService; +import org.apache.knox.gateway.topology.discovery.ClusterConfigurationMonitor; +import org.apache.knox.gateway.topology.discovery.ServiceDiscoveryConfig; + +import java.io.File; +import java.io.IOException; +import java.io.InputStream; +import java.io.ObjectInputStream; +import java.io.ObjectOutputStream; +import java.io.OutputStream; +import java.io.Serializable; +import java.nio.file.Files; +import java.text.DateFormat; +import java.text.SimpleDateFormat; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Date; +import java.util.HashMap; +import java.util.List; +import java.util.Locale; +import java.util.Map; +import java.util.Properties; +import java.util.Set; +import java.util.TimeZone; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.locks.ReadWriteLock; +import java.util.concurrent.locks.ReentrantReadWriteLock; + +/** + * ClusterConfigurationMonitor implementation for clusters managed by ClouderaManager. + */ +public class ClouderaManagerClusterConfigurationMonitor implements ClusterConfigurationMonitor { + + private static final String TYPE = "CM"; + + private static final String CLUSTERS_DATA_DIR_NAME = TYPE + "-clusters"; + + private static final String PERSISTED_FILE_COMMENT = "Generated File. Do Not Edit!"; + + private static final String PROP_CLUSTER_PREFIX = "cluster."; + private static final String PROP_CLUSTER_SOURCE = PROP_CLUSTER_PREFIX + "source"; + private static final String PROP_CLUSTER_NAME = PROP_CLUSTER_PREFIX + "name"; + private static final String PROP_CLUSTER_USER = PROP_CLUSTER_PREFIX + "user"; + private static final String PROP_CLUSTER_ALIAS = PROP_CLUSTER_PREFIX + "pwd.alias"; + + private static final ClouderaManagerServiceDiscoveryMessages log = + MessagesFactory.get(ClouderaManagerServiceDiscoveryMessages.class); + + + // The format of the filter employed when restart events are queried from ClouderaManager + private static final String RESTART_EVENTS_QUERY_FORMAT = "category==" + ApiEventCategory.AUDIT_EVENT.getValue() + + ";attributes.command==Restart" + + ";attributes.command_status==SUCCEEDED" + + ";attributes.cluster==\"%s\"%s"; + + // The format of the timestamp element of the restart events query filter + private static final String EVENTS_QUERY_TIMESTAMP_FORMAT = ";timeOccurred=gt=%s"; + + // The default amount of time before "now" the monitor will check for restart events the first time + private static final long DEFAULT_EVENT_QUERY_DEFAULT_TIMESTAMP_OFFSET = (60 * 60 * 1000); // one hour + + // ISO 8601 datetime format for restart event query filtering + private DateFormat eventQueryTimestampFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm'Z'", Locale.getDefault()); + + private GatewayConfig gatewayConfig; + private AliasService aliasService; + private PollingConfigAnalyzer internalMonitor; + private List<ConfigurationChangeListener> changeListeners = new ArrayList<>(); + + // Cache of ClouderaManager API clients, keyed by discovery address + private Map<String, DiscoveryApiClient> clients = new ConcurrentHashMap<>(); + + // ClouderaManager address + // clusterName -> ServiceDiscoveryConfig + // + private Map<String, Map<String, ServiceDiscoveryConfig>> clusterMonitorConfigurations = new ConcurrentHashMap<>(); + + // ClouderaManager address + // clusterName + // serviceType -> Properties + // + private Map<String, Map<String, Map<String, ServiceConfigurationProperties>>> clusterServiceConfigurations = + new ConcurrentHashMap<>(); + + private ReadWriteLock serviceConfigurationsLock = new ReentrantReadWriteLock(); + + private ReadWriteLock clusterMonitorConfigurationsLock = new ReentrantReadWriteLock(); + + // Timestamp records of the most recent restart event query per discovery address + private Map<String, String> eventQueryTimestamps = new ConcurrentHashMap<>(); + + // The amount of time before "now" the monitor will check for restart events the first time + private long eventQueryDefaultTimestampOffset = DEFAULT_EVENT_QUERY_DEFAULT_TIMESTAMP_OFFSET; + + static String getType() { + return TYPE; + } + + ClouderaManagerClusterConfigurationMonitor(final GatewayConfig config, final AliasService aliasService) { + this.gatewayConfig = config; + this.aliasService = aliasService; + this.internalMonitor = new PollingConfigAnalyzer(this); + + eventQueryTimestampFormat.setTimeZone(TimeZone.getTimeZone("UTC")); + + // Override the default polling interval if it has been configured + // (org.apache.knox.gateway.topology.discovery.cm.monitor.interval) + int interval = config.getClusterMonitorPollingInterval(getType()); + if (interval > 0) { + setPollingInterval(interval); + } + + init(); + } + + @Override + @SuppressWarnings("PMD.DoNotUseThreads") + public void start() { + log.startingClouderaManagerConfigMonitor(); + (new Thread(internalMonitor, "ClouderaManagerConfigurationMonitor")).start(); Review comment: Agreed ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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