org.beigesoft.replicator.service.DatabaseReaderSyncStdXml Maven / Gradle / Ivy

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It replicate/persist any entity according XML settings and user's requirements with a file or network (HTTP). Right now it has implemented XML format of stored/transferred data.
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package org.beigesoft.replicator.service;

/*
 * Beigesoft ™
 *
 * Licensed under the Apache License, Version 2.0
 *
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 */

import java.util.Map;
import java.io.Reader;

import org.beigesoft.settings.IMngSettings;
import org.beigesoft.exception.ExceptionWithCode;
import org.beigesoft.service.IUtilXml;
import org.beigesoft.orm.service.ISrvOrm;
import org.beigesoft.orm.service.ISrvDatabase;
import org.beigesoft.log.ILogger;

/**
 * Service that reads entities from given stream XML
 * (file or network connection) and insert them into database.
 * It makes database synchronized copy i.e. if entity is APersistableBase
 * (itsId, databaseBirth, idBirth) then it be synchronized by
 * {idBirth and idDatabaseBirth}. Other by explicit ID (Long or String type).
 * This is transactional service!
 * This is only for entities of types:
 * APersistableBase, AHasIdLong and AHasIdString
 * 
 *
 * @param  platform dependent record set type
 * @author Yury Demidenko
 */
public class DatabaseReaderSyncStdXml implements IDatabaseReader {

  /**
   * Entity Reader.
   **/
  private ISrvEntityReader srvEntityReader;

  /**
   * Logger.
   **/
  private ILogger logger;

  /**
   * ORM service.
   **/
  private ISrvOrm srvOrm;

  /**
   * Database service.
   **/
  private ISrvDatabase srvDatabase;

  /**
   * XML service.
   **/
  private IUtilXml utilXml;

  /**
   * Manager Settings.
   **/
  private IMngSettings mngSettings;

  /**
   * Services Entity Sync map.
   **/
  private Map srvEntitySyncMap;

  /**
   * 
   * Read entities from stream (by given reader) and synchronize them
   * into DB.
   * 
   * @param pReader Reader
   * @param pAddParam additional params
   * @throws Exception - an exception
   **/
  @Override
  public final void readAndStoreEntities(final Reader pReader,
    final Map pAddParam) throws Exception {
    try {
      this.srvDatabase.setIsAutocommit(false);
      this.srvDatabase.
        setTransactionIsolation(ISrvDatabase.TRANSACTION_READ_UNCOMMITTED);
      this.srvDatabase.beginTransaction();
      while (this.utilXml.readUntilStart(pReader, "entity")) {
        Object entity = this.srvEntityReader.read(pReader, null);
        String nameEntitySync = this.mngSettings.getClassesSettings()
          .get(entity.getClass().getCanonicalName()).get("ISrvEntitySync");
        ISrvEntitySync srvEntitySync = this.srvEntitySyncMap
          .get(nameEntitySync);
        if (srvEntitySync == null) {
          throw new ExceptionWithCode(ExceptionWithCode
            .CONFIGURATION_MISTAKE, "There is no ISrvEntitySync "
              + nameEntitySync + " for " + entity.getClass());
        }
        boolean isNew = srvEntitySync.sync(entity, null);
        if (isNew) {
          this.srvOrm.insertEntity(entity);
        } else {
          this.srvOrm.updateEntity(entity);
        }
      }
      this.srvDatabase.commitTransaction();
    } catch (Exception ex) {
      this.srvDatabase.rollBackTransaction();
      throw ex;
    } finally {
      this.srvDatabase.releaseResources();
    }
  }

  //Simple getters and setters:
  /**
   * Getter for mngSettings.
   * @return IMngSettings
   **/
  public final IMngSettings getMngSettings() {
    return this.mngSettings;
  }

  /**
   * Setter for mngSettings.
   * @param pMngSettings reference
   **/
  public final void setMngSettings(final IMngSettings pMngSettings) {
    this.mngSettings = pMngSettings;
  }

  /**
   * Getter for srvEntityReader.
   * @return ISrvEntityReader
   **/
  public final ISrvEntityReader getSrvEntityReader() {
    return this.srvEntityReader;
  }

  /**
   * Setter for srvEntityReader.
   * @param pSrvEntityReader reference
   **/
  public final void setSrvEntityReader(
    final ISrvEntityReader pSrvEntityReader) {
    this.srvEntityReader = pSrvEntityReader;
  }

  /**
   * Getter for logger.
   * @return ILogger
   **/
  public final ILogger getLogger() {
    return this.logger;
  }

  /**
   * Setter for logger.
   * @param pLogger reference
   **/
  public final void setLogger(final ILogger pLogger) {
    this.logger = pLogger;
  }

  /**
   * Getter for srvOrm.
   * @return ISrvOrm
   **/
  public final ISrvOrm getSrvOrm() {
    return this.srvOrm;
  }

  /**
   * Setter for srvOrm.
   * @param pSrvOrm reference
   **/
  public final void setSrvOrm(final ISrvOrm pSrvOrm) {
    this.srvOrm = pSrvOrm;
  }

  /**
   * Getter for srvDatabase.
   * @return ISrvDatabase
   **/
  public final ISrvDatabase getSrvDatabase() {
    return this.srvDatabase;
  }

  /**
   * Setter for srvDatabase.
   * @param pSrvDatabase reference
   **/
  public final void setSrvDatabase(final ISrvDatabase pSrvDatabase) {
    this.srvDatabase = pSrvDatabase;
  }

  /**
   * Getter for utilXml.
   * @return IUtilXml
   **/
  public final IUtilXml getUtilXml() {
    return this.utilXml;
  }

  /**
   * Setter for utilXml.
   * @param pUtilXml reference
   **/
  public final void setUtilXml(final IUtilXml pUtilXml) {
    this.utilXml = pUtilXml;
  }

  /**
   * Getter for srvEntitySyncMap.
   * @return Map
   **/
  public final Map getSrvEntitySyncMap() {
    return this.srvEntitySyncMap;
  }

  /**
   * Setter for srvEntitySyncMap.
   * @param pSrvEntitySyncMap reference
   **/
  public final void setSrvEntitySyncMap(
    final Map pSrvEntitySyncMap) {
    this.srvEntitySyncMap = pSrvEntitySyncMap;
  }
}