// Create targeting.
Targeting targeting = new Targeting();
targeting.setInventoryTargeting(inventoryTargeting);
// Create a line item.
LineItem lineItem = new LineItem();
lineItem.setTargeting(targeting);
lineItem.setLineItemType(LineItemType.SPONSORSHIP);
// Set the roadblocking type.
lineItem.setRoadblockingType(RoadblockingType.ONE_OR_MORE);
// Set the creative rotation type.
lineItem.setCreativeRotationType(CreativeRotationType.OPTIMIZED);
// Create creative placeholder size.
Size size = new Size();
size.setWidth(300);
size.setHeight(250);
size.setIsAspectRatio(false);
// Create the creative placeholder.
CreativePlaceholder creativePlaceholder = new CreativePlaceholder();
creativePlaceholder.setSize(size);
// Set the size of creatives that can be associated with this line item.
lineItem.setCreativePlaceholders(new CreativePlaceholder[] {creativePlaceholder});
// Set the length of the line item to run.
lineItem.setStartDateTimeType(StartDateTimeType.IMMEDIATELY);
lineItem.setEndDateTime(
DateTimes.toDateTime(Instant.now().plus(Duration.standardDays(30L)), "America/New_York"));
// Set the cost type.
lineItem.setCostType(CostType.CPM);
// Set the line item to use 50% of the impressions.
lineItem.setUnitType(UnitType.IMPRESSIONS);
lineItem.setUnitsBought(50L);
// Get forecast for line item.
Forecast forecast = forecastService.getForecast(lineItem);
long matched = forecast.getMatchedUnits();