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.camel.component.influxdb;
  
  import org.apache.camel.Category;
  import org.apache.camel.Consumer;
  import org.apache.camel.Processor;
  import org.apache.camel.Producer;
  import org.apache.camel.spi.Metadata;
  import org.apache.camel.spi.UriEndpoint;
  import org.apache.camel.spi.UriParam;
  import org.apache.camel.spi.UriPath;
  import org.apache.camel.support.DefaultEndpoint;
  import org.influxdb.InfluxDB;
  import org.influxdb.dto.Query;
  import org.influxdb.dto.QueryResult;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Interact with <a href="https://influxdata.com/time-series-platform/influxdb/">InfluxDB</a> v1, a time series
   * database.
   */
  @UriEndpoint(firstVersion = "2.18.0", scheme = "influxdb", title = "InfluxDB", syntax = "influxdb:connectionBean",
               category = { Category.DATABASE }, producerOnly = true, headersClass = InfluxDbConstants.class)
  public class InfluxDbEndpoint extends DefaultEndpoint {
  
      private static final Logger LOG = LoggerFactory.getLogger(InfluxDbEndpoint.class);
      private static final String CREATE_DATABASE = "CREATE DATABASE ";
      private static final String SHOW_DATABASES = "SHOW DATABASES";
  
      private InfluxDB influxDB;
  
      @UriPath
      @Metadata(required = true)
      private String connectionBean;
      @UriParam
      private String databaseName;
      @UriParam(defaultValue = "default")
      private String retentionPolicy = "default";
      @UriParam(defaultValue = "false")
      private boolean batch;
      @UriParam(defaultValue = InfluxDbOperations.INSERT)
      private String operation = InfluxDbOperations.INSERT;
      @UriParam
      private String query;
      @UriParam(defaultValue = "false")
      private boolean checkDatabaseExistence;
      @UriParam(defaultValue = "false")
      private boolean autoCreateDatabase;
  
      public InfluxDbEndpoint(String uri, InfluxDbComponent component) {
          super(uri, component);
      }
  
      @Override
      public Producer createProducer() throws Exception {
          return new InfluxDbProducer(this);
      }
  
      @Override
      public Consumer createConsumer(Processor processor) throws Exception {
          throw new UnsupportedOperationException("You cannot receive messages from this endpoint");
      }
  
      @Override
      protected void doInit() throws Exception {
          super.doInit();
  
          if (checkDatabaseExistence) {
              ensureDatabaseExists();
          }
  
      }
  
      public InfluxDB getInfluxDB() {
          return influxDB;
      }
  
      /**
       * The Influx DB to use
       */
      public void setInfluxDB(InfluxDB influxDB) {
          this.influxDB = influxDB;
      }
  
      public String getDatabaseName() {
          return databaseName;
      }
  
      /**
       * The name of the database where the time series will be stored
       */
      public void setDatabaseName(String databaseName) {
          this.databaseName = databaseName;
      }
  
      public String getRetentionPolicy() {
          return retentionPolicy;
      }
  
      /**
       * The string that defines the retention policy to the data created by the endpoint
       */
      public void setRetentionPolicy(String retentionPolicy) {
          this.retentionPolicy = retentionPolicy;
      }
  
      public String getConnectionBean() {
          return connectionBean;
      }
  
      /**
       * Connection to the influx database, of class InfluxDB.class
       */
      public void setConnectionBean(String connectionBean) {
          this.connectionBean = connectionBean;
      }
  
      public boolean isBatch() {
          return batch;
      }
  
      /**
       * Define if this operation is a batch operation or not
       */
      public void setBatch(boolean batch) {
          this.batch = batch;
      }
  
      public String getOperation() {
          return operation;
      }
  
      /**
       * Define if this operation is an insert or a query
       */
      public void setOperation(String operation) {
          this.operation = operation;
      }
  
      public String getQuery() {
          return query;
      }
  
      /**
       * Define the query in case of operation query
       */
      public void setQuery(String query) {
          this.query = query;
      }
  
      public boolean isCheckDatabaseExistence() {
          return checkDatabaseExistence;
      }
  
      /**
       * Define if we want to check the database existence while starting the endpoint
       */
      public void setCheckDatabaseExistence(boolean checkDatabaseExistence) {
          this.checkDatabaseExistence = checkDatabaseExistence;
      }
  
      public boolean isAutoCreateDatabase() {
          return autoCreateDatabase;
      }
  
      /**
       * Define if we want to auto create the database if it's not present
       */
      public void setAutoCreateDatabase(boolean autoCreateDatabase) {
          this.autoCreateDatabase = autoCreateDatabase;
      }
  
      private void ensureDatabaseExists() {
          QueryResult result = getInfluxDB().query(new Query(SHOW_DATABASES));
  
          //values are located in the first item in series, where list of values is the first item in the Serie's values,
          //if any object on the 'path' is null, database does not exist
          boolean exists;
          try {
              //NPE could be thrown from objects deep in the structure.
              //try catch block with NullPointerException is used on purpose
              exists = result.getResults().get(0).getSeries().get(0).getValues().get(0).contains(databaseName);
          } catch (NullPointerException e) {
              exists = false;
          }
  
          if (!exists) {
              if (autoCreateDatabase) {
                  LOG.debug("Database {} doesn't exist. Creating it...", databaseName);
                  getInfluxDB().query(new Query(CREATE_DATABASE + databaseName, ""));
              }
          }
      }
  }
  