This is a simple (incomplete) example C4 model based upon the financial risk system architecture kata, which can be found at http://bit.ly/sa4d-risksystem

FinancialRiskSystem.java

package com.structurizr.example;

import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.structurizr.model.Location;
import com.structurizr.model.Model;
import com.structurizr.model.Person;
import com.structurizr.model.SoftwareSystem;
import com.structurizr.view.ContextView;

/**
 * This is a simple (incomplete) example C4 model based upon the financial risk system
 * architecture kata, which can be found at http://bit.ly/sa4d-risksystem
 */
public class FinancialRiskSystem {

    public static void main(String[] args) throws Exception {
        Model model = new Model();

        // create the basic model
        SoftwareSystem financialRiskSystem = model.addSoftwareSystem(Location.Internal, "Financial Risk System", "Calculates the bank's exposure to risk for product X");

        Person businessUser = model.addPerson(Location.Internal, "Business User", "A regular business user");
        businessUser.uses(financialRiskSystem, "Views reports");

        Person configurationUser = model.addPerson(Location.Internal, "Configuration User", "A regular business user who can also configure the parameters used in the risk calculations");
        configurationUser.uses(financialRiskSystem, "Configures parameters");

        SoftwareSystem tradeDataSystem = model.addSoftwareSystem(Location.External, "Trade Data System", "The system of record for trades of type X");
        financialRiskSystem.uses(tradeDataSystem, "Gets trade data from");

        SoftwareSystem referenceDataSystem = model.addSoftwareSystem(Location.External, "Reference Data System", "Manages reference data for all counterparties the bank interacts with");
        financialRiskSystem.uses(referenceDataSystem, "Gets counterparty data from");

        SoftwareSystem emailSystem = model.addSoftwareSystem(Location.Internal, "E-mail system", "Microsoft Exchange");
        financialRiskSystem.uses(emailSystem, "Sends a notification that a report is ready via e-mail to");
        emailSystem.sendsSomethingTo(businessUser, "Sends a notification that a report is ready via e-mail to");

        SoftwareSystem centralMonitoringService = model.addSoftwareSystem(Location.Internal, "Central Monitoring Service", "The bank-wide monitoring and alerting dashboard");
        financialRiskSystem.uses(centralMonitoringService, "Sends critical failure alerts to");

        SoftwareSystem activeDirectory = model.addSoftwareSystem(Location.Internal, "Active Directory", "Manages users and security roles across the bank");
        financialRiskSystem.uses(activeDirectory, "Uses for authentication and authorisation");

        // and create some views
        ContextView contextView = model.createContextView(financialRiskSystem);
        contextView.addAllSoftwareSystems();
        contextView.addAllPeople();

        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.enable(SerializationFeature.INDENT_OUTPUT);
        objectMapper.enable(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT);
        String modelAsJson = objectMapper.writeValueAsString(model);
        System.out.println(modelAsJson);
    }

}