The document discusses domain-driven design (DDD) principles for modeling a syndicated loan facility and transactions. It presents an application service for adjusting loan amounts and processing principal payments by updating the share pie to reflect the transactions. The domain model uses entities like Facility, Loan, and Transactions like DrawDown and PrincipalPayment that implement the business logic and rules.

1. PARTⅢ
http://www.flickr.com/photos/penguinbush/2768719983/

2. (kentaro714)
JavaEE Clojure
IT

3. Agenda
• PartⅢ
•
•
• DDD

4. PartⅢ

5. Part1
PartⅡ ParⅢ

8. 1000

9. 20% …
1000
30% 50%

10. 500×0.2=100
500
000
500
500
500×0.3=150 500×0.5=250

11. 800
300
300 500
200

13. *+
$%&'()
*+#
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14. 200
:%&'()* :+,
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12A0,:0,
-+,./
0,12 = A12
0,34 = 20% +,# = 40$
12B0,:0,
-+,./
0,12 = B12
0,34 = 30% +,# = 60$
12C0,:0,
-+,./
0,12 = C12
0,34 = 50% +,# = 100$

17. …
500 500×0.2-50=50
50
200
700
500×0.3 500×0.5+50
=150 =300

19. ,-./01 23
!"# 23#
$%&'($%(, $%), *+) 45&(6#)
78&(6#)
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20. :%&'()* :+,
!"# = 1000$ +,# = 700$
12A0,:0,
-+,./
0,12 = A12
0,34 = 20% +,# = 90$
12B0,:0,
-+,56
0,12 = B12
0,34 = 30% +,# = 150$
12C0,:0,
-+,./
0,12 = C12
0,34 = 50% +,# = 400$

21. Application Service
public class SyndicateService {
private FacilityRepository facilityRepository;
private LoanRepository loanRepository;
public void drawDownWithAdjustment(long facilityId, BigDecimal amount,
Map<String, BigDecimal> adjustment) {
Facility facility = facilityRepository.get(facilityId);
Loan loan = facility.getLoan();
for (Investment investment : facility.getInvestments()) {
if (adjustment.containsKey(investment.getInvestor().getName())) {
BigDecimal share = BigDecimal.valueOf(investment.getPercentage());
BigDecimal variance = adjustment.get(investment.getInvestor()
.getName());
LoanAdjustment loanAdjustment = new LoanAdjustment(
Money.yen(amount.multiply(share).add(variance)));
loan.addLoanInvestment(loanAdjustment);
}
}
loanRepository.save(loan);
}

22. …

24. 500×90/700=64.28..
500
500 300
800
500×210/700 500×400/700
=150 =285.714...

25. …

26. Application Service
public class SyndicateService {
private FacilityRepository facilityRepository;
private LoanRepository loanRepository;
public void processPrincipalPayment(long facilityId, BigDecimal amount) {
Facility facility = facilityRepository.get(facilityId);
Loan loan = facility.getLoan();
for (LoanInvestment investment : loan.getLoanInvestments()) {
BigDecimal share = investment.getAmount().divide(loan.getAmount());
Money newAmount = Money.yen(amount.multiply(share));
LoanAdjustment loanAdjustment = new LoanAdjustment(investment
.getAmount().minus(newAmount));
loan.addLoanInvestment(loanAdjustment);
}
loanRepository.save(loan);
}

27. 2 …

28. …

29. ,-./01 23
!"# 23#
$%&'($%(, $%), *+) 45&(6#)
78&(6#)
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34. :1000 100
20%
¥20
50%
100 ¥30
¥50
30%

35. ¥70
¥50
¥20
¥50 ¥150 ¥180
¥30 ¥300 ¥350
100 500 600

37. +,-./ +,-
*
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38. 78
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39. Application Service
public class SyndicateService {
private FacilityRepository facilityRepository;
private LoanRepository loanRepository;
public void drawDownWithAdjustment(long facilityId, BigDecimal amount,
Map<String, BigDecimal> adjustment) {
Facility facility = facilityRepository.get(facilityId);
Loan loan = facility.getLoan();
AmountPie drawDownSharePie = facility.getPie().prorate(amount);
AmountPie adjustSharePie = AmountPie.createFrom(adjustment);
loan.setPie(drawDownSharePie.plus(adjustSharePie));
loanRepository.save(loan);
}
public void processPrincipalPayment(long facilityId, BigDecimal amount) {
Facility facility = facilityRepository.get(facilityId);
Loan loan = facility.getLoan();
SharePie principalSharePie = loan.getPie().prorate(amount);
loan.setPie(loan.getPie().minus(principalSharePie));
loanRepository.save(loan);
}

42. …

43. #&'() !"#$% 12 3#&'()
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AP

44. Application Service
public void drawDownWithAdjustment(long facilityId, BigDecimal amount,
Map<String, BigDecimal> adjustment) {
Facility facility = facilityRepository.findById(facilityId);
Loan loan = facility.getLoan();
SharePie drawDownSharePie = facility.getSharePie().prorate(amount);
SharePie adjustSharePie = AmountPie.createFrom(adjustment);
Transaction drawDown = new DrawDown(loan,
drawDownSharePie.plus(adjustSharePie));
loan.apply(drawDown);
loanRepository.save(loan);
}
public void processPrincipalPayment(long facilityId, BigDecimal amount) {
Facility facility = facilityRepository.get(facilityId);
Loan loan = facility.getLoan();
SharePie principalSharePie = loan.getPie().prorate(amount);
Transaction principalPayment = new PrincipalPayment(loan,
principalSharePie);
loan.apply(principalPayment);
loanRepository.save(loan);
}

45. public class DrawDown extends Transaction {
public DrawDown(Position position, SharePie sharePie) {
super(position, sharePie);
}
@Override
public void execute() {
SharePie newSharePie = position.getPie().plus(this.sharePie);
position.setPie(newSharePie);
}
}

46. …

47. #&'() !"#$%
* 12 3#&'()
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49. http://www.flickr.com/photos/94379417@N00/4808475862/in/photostream/

50. http://www.flickr.com/photos/dmclear/5418495331/

51. http://www.flickr.com/photos/spcbrass/5451894896/

52. DDD