DNodeProperties.java

package com.splout.db.dnode;

/*
 * #%L
 * Splout SQL Server
 * %%
 * Copyright (C) 2012 Datasalt Systems S.L.
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

/**
 * All the {@link com.splout.db.common.SploutConfiguration} properties related to the {@link DNode}.
 */
public class DNodeProperties {

  /**
   * The data folder that will be used for storing deployed SQL data stores.
   */
  public final static String DATA_FOLDER = "dnode.data.folder";
  /**
   * This DNode's host name
   */
  public final static String HOST = "dnode.host";
  /**
   * This DNode's port
   */
  public final static String PORT = "dnode.port";
  /**
   * How many threads will be allocated for serving requests in Thrift's ThreadPoolServer
   */
  public final static String SERVING_THREADS = "dnode.serving.threads";
  /**
   * Whether this DNode should find the next available port in case "dnode.port" is busy or fail otherwise.
   */
  public final static String PORT_AUTOINCREMENT = "dnode.port.autoincrement";
  /**
   * The amount of seconds that the DNode will cache SQL connection pools. After that time, it will close them. Remember
   * that the DNode may receive requests for different versions in the middle of a deployment, so that's why we want to
   * expire connection pools after some time (to not cache connection pools that will not be used anymore).
   */
  public final static String EH_CACHE_SECONDS = "dnode.pool.cache.seconds";
  /**
   * The amount of seconds that the DNode will wait before canceling a too-long deployment.
   */
  public final static String DEPLOY_TIMEOUT_SECONDS = "dnode.deploy.timeout.seconds";
  /**
   * The amount of parallel downloads that are allowed per each deployment
   */
  public final static String DEPLOY_PARALLELISM = "dnode.deploy.parallelism";
  /**
   * A hard limit on the number of results per each SQL query that this DNode may send back to QNodes.
   */
  public final static String MAX_RESULTS_PER_QUERY = "dnode.max.results.per.query";
  /**
   * If set, this DNode will listen for test commands. This property is used to activate responsiveness to some commands
   * that are useful for integration testing: making a DNode shutdown, etc.
   */
  public final static String HANDLE_TEST_COMMANDS = "dnode.handle.test.commands";
  /**
   * Number of SQL connection pools that will be cached. There will be one SQL connection pool for each tablespace,
   * version and partition that this DNode serves. So this number must not be smaller than the different numbers of
   * tablespace + version + partitions.
   */
  public final static String EH_CACHE_N_ELEMENTS = "dnode.pool.cache.n.elements";
  /**
   * In milliseconds, queries that are slower will be logged with a WARNING.
   */
  public final static String SLOW_QUERY_ABSOLUTE_LIMIT = "dnode.slow.query.abs.limit";
  /**
   * Queries that run for more than this time will be interrupted.
   */
  public final static String MAX_QUERY_TIME = "dnode.max.query.time";
  /**
   * The port where the DNode will listen for TCP connections to serve streaming data.
   */
  public final static String STREAMING_PORT = "dnode.streaming.port";
  /**
   * Enable to avoid opening a port for TCP streaming
   */
  public final static String STREAMING_API_DISABLE = "dnode.disable.streaming.api";
}