InventoryService.java

package camelinaction;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class InventoryService {

    private static final Logger LOG = LoggerFactory.getLogger(InventoryService.class);

    /**
     * Convert the CSV to a model object
     */
    public UpdateInventory csvToObject(String csv) {
        String[] lines = csv.split(",");
        if (lines == null || lines.length != 4) {
            throw new IllegalArgumentException("CSV line is not valid: " + csv);
        }

        String supplierId = lines[0];
        String partId = lines[1];
        String name = lines[2];
        String amount = lines[3];

        return new UpdateInventory(supplierId, partId, name, amount);
    }

    /**
     * To simulate updating the inventory by calling some external system which takes a bit of time
     */
    public void updateInventory(UpdateInventory update) throws Exception {
        // simulate updating using some CPU processing
        Thread.sleep(100);

        LOG.info("Inventory " + update.getPartId() + " updated");
    }

}