How to use

OptimizerFactory

in

org.hibernate.id.enhanced

/**
 * Builds an optimizer
 *
 * @param type The optimizer type, either a short-hand name or the {@link Optimizer} class name.
 * @param returnClass The generated value java type
 * @param incrementSize The increment size.
 * @param explicitInitialValue The user supplied initial-value (-1 indicates the user did not specify).
 *
 * @return The built optimizer
 */
public static Optimizer buildOptimizer(String type, Class returnClass, int incrementSize, long explicitInitialValue) {
  final Optimizer optimizer = buildOptimizer( type, returnClass, incrementSize );
  if ( InitialValueAwareOptimizer.class.isInstance( optimizer ) ) {
    ( (InitialValueAwareOptimizer) optimizer ).injectInitialValue( explicitInitialValue );
  }
  return optimizer;
}

    return buildFallbackOptimizer( returnClass, incrementSize );
return buildFallbackOptimizer( returnClass, incrementSize );

  if ( !dialect.supportsPooledSequences() && OptimizerFactory.isPooledOptimizer( optimizationStrategy ) ) {
    forceTableUse = true;
    LOG.forcingTableUse();
    incrementSize
);
this.optimizer = OptimizerFactory.buildOptimizer(
    optimizationStrategy,
    identifierType.getReturnedClass(),

@Override
public void configure(Type type, Properties params, ServiceRegistry serviceRegistry) throws MappingException {
  storeLastUsedValue = serviceRegistry.getService( ConfigurationService.class )
      .getSetting( AvailableSettings.TABLE_GENERATOR_STORE_LAST_USED, StandardConverters.BOOLEAN, true );
  identifierType = type;
  final JdbcEnvironment jdbcEnvironment = serviceRegistry.getService( JdbcEnvironment.class );
  qualifiedTableName = determineGeneratorTableName( params, jdbcEnvironment, serviceRegistry );
  segmentColumnName = determineSegmentColumnName( params, jdbcEnvironment );
  valueColumnName = determineValueColumnName( params, jdbcEnvironment );
  segmentValue = determineSegmentValue( params );
  segmentValueLength = determineSegmentColumnSize( params );
  initialValue = determineInitialValue( params );
  incrementSize = determineIncrementSize( params );
  final String optimizationStrategy = ConfigurationHelper.getString(
      OPT_PARAM,
      params,
      OptimizerFactory.determineImplicitOptimizerName( incrementSize, params )
  );
  int optimizerInitialValue = ConfigurationHelper.getInt( INITIAL_PARAM, params, -1 );
  optimizer = OptimizerFactory.buildOptimizer(
      optimizationStrategy,
      identifierType.getReturnedClass(),
      incrementSize,
      optimizerInitialValue
  );
}

/**
 * Determine the optimizer to use.
 * <p/>
 * Called during {@link #configure configuration}.
 *
 * @param params The params supplied in the generator config (plus some standard useful extras).
 * @param incrementSize The {@link #determineIncrementSize determined increment size}
 * @return The optimizer strategy (name)
 */
@SuppressWarnings("WeakerAccess")
protected String determineOptimizationStrategy(Properties params, int incrementSize) {
  return ConfigurationHelper.getString(
      OPT_PARAM,
      params,
      OptimizerFactory.determineImplicitOptimizerName( incrementSize, params )
  );
}

@Override
public void configure(JavaTypeDescriptor javaTypeDescriptor, Properties params, ServiceRegistry serviceRegistry) throws MappingException {
  storeLastUsedValue = serviceRegistry.getService( ConfigurationService.class )
      .getSetting( AvailableSettings.TABLE_GENERATOR_STORE_LAST_USED, StandardConverters.BOOLEAN, true );
  identifierType = javaTypeDescriptor;
  final JdbcEnvironment jdbcEnvironment = serviceRegistry.getService( JdbcEnvironment.class );
  qualifiedTableName = determineGeneratorTableName( params, jdbcEnvironment, serviceRegistry );
  segmentColumnName = determineSegmentColumnName( params, jdbcEnvironment );
  valueColumnName = determineValueColumnName( params, jdbcEnvironment );
  segmentValue = determineSegmentValue( params );
  segmentValueLength = determineSegmentColumnSize( params );
  initialValue = determineInitialValue( params );
  incrementSize = determineIncrementSize( params );
  final String optimizationStrategy = ConfigurationHelper.getString(
      OPT_PARAM,
      params,
      OptimizerFactory.determineImplicitOptimizerName( incrementSize, params )
  );
  int optimizerInitialValue = ConfigurationHelper.getInt( INITIAL_PARAM, params, -1 );
  optimizer = OptimizerFactory.buildOptimizer(
      optimizationStrategy,
      identifierType.getJavaType(),
      incrementSize,
      optimizerInitialValue
  );
}

/**
 * Determine the optimizer to use.
 * <p/>
 * Called during {@link #configure configuration}.
 *
 * @param params The params supplied in the generator config (plus some standard useful extras).
 * @param incrementSize The {@link #determineIncrementSize determined increment size}
 * @return The optimizer strategy (name)
 */
@SuppressWarnings("WeakerAccess")
protected String determineOptimizationStrategy(Properties params, int incrementSize) {
  return ConfigurationHelper.getString(
      OPT_PARAM,
      params,
      OptimizerFactory.determineImplicitOptimizerName( incrementSize, params )
  );
}

private static Optimizer buildOptimizer(
    StandardOptimizerDescriptor descriptor,
    long initial,
    int increment) {
  return OptimizerFactory.buildOptimizer( descriptor.getExternalName(), Long.class, increment, initial );
}

  if ( !dialect.supportsPooledSequences() && OptimizerFactory.isPooledOptimizer( optimizationStrategy ) ) {
    forceTableUse = true;
    LOG.forcingTableUse();
    incrementSize
);
this.optimizer = OptimizerFactory.buildOptimizer(
    optimizationStrategy,
    identifierType.getReturnedClass(),

    return buildFallbackOptimizer( returnClass, incrementSize );
return buildFallbackOptimizer( returnClass, incrementSize );

/**
 * Builds an optimizer
 *
 * @param type The optimizer type, either a short-hand name or the {@link Optimizer} class name.
 * @param returnClass The generated value java type
 * @param incrementSize The increment size.
 * @param explicitInitialValue The user supplied initial-value (-1 indicates the user did not specify).
 *
 * @return The built optimizer
 */
@SuppressWarnings({ "UnnecessaryBoxing", "deprecation" })
public static Optimizer buildOptimizer(String type, Class returnClass, int incrementSize, long explicitInitialValue) {
  final Optimizer optimizer = buildOptimizer( type, returnClass, incrementSize );
  if ( InitialValueAwareOptimizer.class.isInstance( optimizer ) ) {
    ( (InitialValueAwareOptimizer) optimizer ).injectInitialValue( explicitInitialValue );
  }
  return optimizer;
}

  if ( !dialect.supportsPooledSequences() && OptimizerFactory.isPooledOptimizer( optimizationStrategy ) ) {
    forceTableUse = true;
    LOG.forcingTableUse();
    incrementSize
);
this.optimizer = OptimizerFactory.buildOptimizer(
    optimizationStrategy,
    identifierType.getReturnedClass(),

    return buildFallbackOptimizer( returnClass, incrementSize );
return buildFallbackOptimizer( returnClass, incrementSize );

/**
 * Builds an optimizer
 *
 * @param type The optimizer type, either a short-hand name or the {@link Optimizer} class name.
 * @param returnClass The generated value java type
 * @param incrementSize The increment size.
 * @param explicitInitialValue The user supplied initial-value (-1 indicates the user did not specify).
 *
 * @return The built optimizer
 */
@SuppressWarnings({ "UnnecessaryBoxing", "deprecation" })
public static Optimizer buildOptimizer(String type, Class returnClass, int incrementSize, long explicitInitialValue) {
  final Optimizer optimizer = buildOptimizer( type, returnClass, incrementSize );
  if ( InitialValueAwareOptimizer.class.isInstance( optimizer ) ) {
    ( (InitialValueAwareOptimizer) optimizer ).injectInitialValue( explicitInitialValue );
  }
  return optimizer;
}

  if ( !dialect.supportsPooledSequences() && OptimizerFactory.isPooledOptimizer( optimizationStrategy ) ) {
    forceTableUse = true;
    LOG.forcingTableUse();
    incrementSize
);
this.optimizer = OptimizerFactory.buildOptimizer(
    optimizationStrategy,
    identifierType.getJavaType(),

    return buildFallbackOptimizer( returnClass, incrementSize );
return buildFallbackOptimizer( returnClass, incrementSize );

/**
 * Builds an optimizer
 *
 * @param type The optimizer type, either a short-hand name or the {@link Optimizer} class name.
 * @param returnClass The generated value java type
 * @param incrementSize The increment size.
 * @param explicitInitialValue The user supplied initial-value (-1 indicates the user did not specify).
 *
 * @return The built optimizer
 */
public static Optimizer buildOptimizer(String type, Class returnClass, int incrementSize, long explicitInitialValue) {
  final Optimizer optimizer = buildOptimizer( type, returnClass, incrementSize );
  if ( InitialValueAwareOptimizer.class.isInstance( optimizer ) ) {
    ( (InitialValueAwareOptimizer) optimizer ).injectInitialValue( explicitInitialValue );
  }
  return optimizer;
}

  @Override
  public Optimizer call() throws Exception {
    Optimizer o = optimizer;
    if (o != null) {
      return o;
    }
    synchronized (this) {
      o = optimizer;
      if (o != null) {
        return o;
      }
      o =
          OptimizerFactory.buildOptimizer(
              OptimizerFactory.StandardOptimizerDescriptor.POOLED
                  .getExternalName(),
              identifierType.getReturnedClass(),
              incrementSize,
              initialValue);
      this.optimizer = o;
    }
    return o;
  }
};

  @Override
  public Optimizer call() throws Exception {
    Optimizer o = optimizer;
    if (o != null) {
      return o;
    }
    synchronized (this) {
      o = optimizer;
      if (o != null) {
        return o;
      }
      o =
          OptimizerFactory.buildOptimizer(
              OptimizerFactory.StandardOptimizerDescriptor.POOLED
                  .getExternalName(),
              identifierType.getReturnedClass(),
              incrementSize,
              initialValue);
      this.optimizer = o;
    }
    return o;
  }
};

  /**
   * jdbc 的主键生成方式
   * @param tableName
   * @return
   */
  public synchronized Serializable generate(String tableName) {
    // 如果表是一个hibernate 实体维护的
/*
    if(false){
      return generate(null);
    }*/
    Properties params = new Properties();
    String defaultPooledOptimizerStrategy = ConfigurationHelper.getBoolean( Environment.PREFER_POOLED_VALUES_LO, params, false )
        ? OptimizerFactory.StandardOptimizerDescriptor.POOLED_LO.getExternalName()
        : OptimizerFactory.StandardOptimizerDescriptor.POOLED.getExternalName();
    final String defaultOptimizerStrategy = incrementSize <= 1
        ? OptimizerFactory.StandardOptimizerDescriptor.NONE.getExternalName()
        : defaultPooledOptimizerStrategy;
    final String optimizationStrategy = ConfigurationHelper.getString( OPT_PARAM, params, defaultOptimizerStrategy );
    Optimizer optimizer = OptimizerFactory.buildOptimizer(
        optimizationStrategy,
        new IntegerType().getReturnedClass(),
        incrementSize,
        ConfigurationHelper.getInt(INITIAL_PARAM, params, -1));
    return null;
  }
}