sorting out concurrency issues with loans -1

mifosng-provider/src/integrationTest/java/org/mifosplatform/integrationtests/ConcurrencyIntegrationTest.java

@@ -0,0 +1,142 @@
+package org.mifosplatform.integrationtests;
+
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Locale;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mifosplatform.integrationtests.common.ClientHelper;
+import org.mifosplatform.integrationtests.common.Utils;
+import org.mifosplatform.integrationtests.common.accounting.Account;
+import org.mifosplatform.integrationtests.common.loans.LoanApplicationTestBuilder;
+import org.mifosplatform.integrationtests.common.loans.LoanProductTestBuilder;
+import org.mifosplatform.integrationtests.common.loans.LoanTransactionHelper;
+
+import com.jayway.restassured.builder.RequestSpecBuilder;
+import com.jayway.restassured.builder.ResponseSpecBuilder;
+import com.jayway.restassured.http.ContentType;
+import com.jayway.restassured.specification.RequestSpecification;
+import com.jayway.restassured.specification.ResponseSpecification;
+
+public class ConcurrencyIntegrationTest {
+
+    private ResponseSpecification responseSpec;
+    private RequestSpecification requestSpec;
+    private LoanTransactionHelper loanTransactionHelper;
+
+    private static final String NO_ACCOUNTING = "1";
+
+    final int MYTHREADS = 30;
+
+    @Before
+    public void setup() {
+        Utils.initializeRESTAssured();
+        this.requestSpec = new RequestSpecBuilder().setContentType(ContentType.JSON).build();
+        this.requestSpec.header("Authorization", "Basic " + Utils.loginIntoServerAndGetBase64EncodedAuthenticationKey());
+        this.responseSpec = new ResponseSpecBuilder().expectStatusCode(200).build();
+        this.loanTransactionHelper = new LoanTransactionHelper(this.requestSpec, this.responseSpec);
+    }
+
+    @Test
+    public void verifyConcurrentLoanRepayments() {
+        this.loanTransactionHelper = new LoanTransactionHelper(this.requestSpec, this.responseSpec);
+
+        final Integer clientID = ClientHelper.createClient(this.requestSpec, this.responseSpec);
+        ClientHelper.verifyClientCreatedOnServer(this.requestSpec, this.responseSpec, clientID);
+        final Integer loanProductID = createLoanProduct(false, NO_ACCOUNTING);
+        final Integer loanID = applyForLoanApplication(clientID, loanProductID, "12,000.00");
+        this.loanTransactionHelper.approveLoan("20 September 2011", loanID);
+        this.loanTransactionHelper.disburseLoan("20 September 2011", loanID, "12,000.00");
+
+        ExecutorService executor = Executors.newFixedThreadPool(MYTHREADS);
+        Calendar date = Calendar.getInstance();
+        date.set(2011, 9, 20);
+        Float repaymentAmount = 100.0f;
+        for (int i = 0; i < 5; i++) {
+            System.out.println("Starting concurrent transaction number " + i);
+            date.add(Calendar.DAY_OF_MONTH, 1);
+            repaymentAmount = repaymentAmount + 100;
+            Runnable worker = new LoanRepaymentExecutor(loanTransactionHelper, loanID, repaymentAmount, date);
+            executor.execute(worker);
+        }
+
+        executor.shutdown();
+        // Wait until all threads are finish
+        while (!executor.isTerminated()) {
+
+        }
+        System.out.println("\nFinished all threads");
+
+    }
+
+    private Integer createLoanProduct(final boolean multiDisburseLoan, final String accountingRule, final Account... accounts) {
+        System.out.println("------------------------------CREATING NEW LOAN PRODUCT ---------------------------------------");
+        final String loanProductJSON = new LoanProductTestBuilder() //
+                .withPrincipal("12,000.00") //
+                .withNumberOfRepayments("4") //
+                .withRepaymentAfterEvery("1") //
+                .withRepaymentTypeAsMonth() //
+                .withinterestRatePerPeriod("1") //
+                .withInterestRateFrequencyTypeAsMonths() //
+                .withAmortizationTypeAsEqualInstallments() //
+                .withInterestTypeAsDecliningBalance() //
+                .withTranches(multiDisburseLoan) //
+                .withAccounting(accountingRule, accounts).build(null);
+        return this.loanTransactionHelper.getLoanProductId(loanProductJSON);
+    }
+
+    private Integer applyForLoanApplication(final Integer clientID, final Integer loanProductID, String principal) {
+        System.out.println("--------------------------------APPLYING FOR LOAN APPLICATION--------------------------------");
+        final String loanApplicationJSON = new LoanApplicationTestBuilder() //
+                .withPrincipal(principal) //
+                .withLoanTermFrequency("4") //
+                .withLoanTermFrequencyAsMonths() //
+                .withNumberOfRepayments("4") //
+                .withRepaymentEveryAfter("1") //
+                .withRepaymentFrequencyTypeAsMonths() //
+                .withInterestRatePerPeriod("2") //
+                .withAmortizationTypeAsEqualInstallments() //
+                .withInterestTypeAsDecliningBalance() //
+                .withInterestCalculationPeriodTypeSameAsRepaymentPeriod() //
+                .withExpectedDisbursementDate("20 September 2011") //
+                .withSubmittedOnDate("20 September 2011") //
+                .build(clientID.toString(), loanProductID.toString(), null);
+        return this.loanTransactionHelper.getLoanId(loanApplicationJSON);
+    }
+
+    public static class LoanRepaymentExecutor implements Runnable {
+
+        private final Integer loanId;
+        private final Float repaymentAmount;
+        private final String repaymentDate;
+        private final LoanTransactionHelper loanTransactionHelper;
+
+        DateFormat dateFormat = new SimpleDateFormat("dd MMMM yyyy", Locale.US);
+
+        LoanRepaymentExecutor(LoanTransactionHelper loanTransactionHelper, Integer loanId, Float repaymentAmount, Calendar repaymentDate) {
+            this.loanId = loanId;
+            this.repaymentAmount = repaymentAmount;
+            this.repaymentDate = dateFormat.format(repaymentDate.getTime());
+            this.loanTransactionHelper = loanTransactionHelper;
+        }
+
+        @Override
+        public void run() {
+            try {
+                this.loanTransactionHelper.makeRepayment(repaymentDate, repaymentAmount, loanId);
+            } catch (Exception e) {
+                System.out.println("Found an exception" + e.getMessage());
+                System.out.println("Details of failed concurrent transaction (date, amount, loanId) are " + repaymentDate + ","
+                        + repaymentAmount + "," + loanId);
+                throw (e);
+            }
+            System.out.println("Details of passed concurrent transaction, details (date, amount, loanId) are " + repaymentDate + ","
+                    + repaymentAmount + "," + loanId);
+        }
+    }
+
+}

mifosng-provider/src/main/java/org/mifosplatform/commands/service/PortfolioCommandSourceWritePlatformServiceImpl.java

@@ -5,6 +5,8 @@
  */
 package org.mifosplatform.commands.service;
 
+import java.util.Random;
+
 import org.joda.time.DateTime;
 import org.mifosplatform.commands.domain.CommandSource;
 import org.mifosplatform.commands.domain.CommandSourceRepository;
@@ -19,6 +21,8 @@ import org.mifosplatform.infrastructure.jobs.service.SchedulerJobRunnerReadServi
 import org.mifosplatform.infrastructure.security.service.PlatformSecurityContext;
 import org.mifosplatform.useradministration.domain.AppUser;
 import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.dao.CannotAcquireLockException;
+import org.springframework.orm.ObjectOptimisticLockingFailureException;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -64,16 +68,34 @@ public class PortfolioCommandSourceWritePlatformServiceImpl implements Portfolio
 
         final String json = wrapper.getJson();
         CommandProcessingResult result = null;
+        JsonCommand command = null;
+        Integer numberOfRetries = 1;
+        Integer maxNumberOfRetries = 10;
         try {
             final JsonElement parsedCommand = this.fromApiJsonHelper.parse(json);
-            final JsonCommand command = JsonCommand.from(json, parsedCommand, this.fromApiJsonHelper, wrapper.getEntityName(),
+            command = JsonCommand.from(json, parsedCommand, this.fromApiJsonHelper, wrapper.getEntityName(), wrapper.getEntityId(),
-                    wrapper.getEntityId(), wrapper.getSubentityId(), wrapper.getGroupId(), wrapper.getClientId(), wrapper.getLoanId(),
+                    wrapper.getSubentityId(), wrapper.getGroupId(), wrapper.getClientId(), wrapper.getLoanId(), wrapper.getSavingsId(),
-                    wrapper.getSavingsId(), wrapper.getTransactionId(), wrapper.getHref(), wrapper.getProductId());
+                    wrapper.getTransactionId(), wrapper.getHref(), wrapper.getProductId());
 
             result = this.processAndLogCommandService.processAndLogCommand(wrapper, command, isApprovedByChecker);
         } catch (final RollbackTransactionAsCommandIsNotApprovedByCheckerException e) {
 
             result = this.processAndLogCommandService.logCommand(e.getCommandSourceResult());
+        } catch (CannotAcquireLockException | ObjectOptimisticLockingFailureException exception) {
+            System.out.println("Number of times this transaction has been retried " + numberOfRetries);
+            if (numberOfRetries >= maxNumberOfRetries) {
+                System.out.println("This transaction is done for");
+                throw (exception);
+            }
+            try {
+                Random random = new Random();
+                int randomNum = random.nextInt(10) + 1;
+                Thread.sleep(1000 + (randomNum * 1000));
+                numberOfRetries = numberOfRetries + 1;
+            } catch (InterruptedException e) {
+                throw (exception);
+            }
+            this.processAndLogCommandService.processAndLogCommand(wrapper, command, isApprovedByChecker);
         }
 
         return result;

mifosng-provider/src/main/java/org/mifosplatform/commands/service/SynchronousCommandProcessingService.java

@@ -445,7 +445,7 @@ public class SynchronousCommandProcessingService implements CommandProcessingSer
             if (wrapper.isUpdateDisbursementDate()) {
                 handler = this.applicationContext.getBean("updateLoanDisbuseDateCommandHandler", NewCommandSourceHandler.class);
             }
-            if(wrapper.addAndDeleteDisbursementDetails()){
+            if (wrapper.addAndDeleteDisbursementDetails()) {
                 handler = this.applicationContext.getBean("addAndDeleteLoanDisburseDetailsCommandHandler", NewCommandSourceHandler.class);
             }
         } else if (wrapper.isGLAccountResource()) {
@@ -923,7 +923,7 @@ public class SynchronousCommandProcessingService implements CommandProcessingSer
             } else {
                 throw new UnsupportedCommandException(wrapper.commandName());
             }
-        }else {
+        } else {
 
             throw new UnsupportedCommandException(wrapper.commandName());
         }

mifosng-provider/src/main/java/org/mifosplatform/portfolio/loanaccount/domain/Loan.java

@@ -34,6 +34,7 @@ import javax.persistence.Temporal;
 import javax.persistence.TemporalType;
 import javax.persistence.Transient;
 import javax.persistence.UniqueConstraint;
+import javax.persistence.Version;
 
 import org.apache.commons.lang.ObjectUtils;
 import org.apache.commons.lang.StringUtils;
@@ -119,8 +120,8 @@ import com.google.gson.JsonPrimitive;
 public class Loan extends AbstractPersistable<Long> {
 
     /** Disable optimistic locking till batch jobs failures can be fixed **/
-    // @Version
+    @Version
-    // int version;
+    int version;
 
     @Column(name = "account_no", length = 20, unique = true, nullable = false)
     private String accountNumber;
@@ -1407,7 +1408,7 @@ public class Loan extends AbstractPersistable<Long> {
             this.disbursementDetails.clear();
         }
 
-        if (loanProduct.isMultiDisburseLoan() || loanProduct.canDefineInstallmentAmount ()) {
+        if (loanProduct.isMultiDisburseLoan() || loanProduct.canDefineInstallmentAmount()) {
             if (command.isChangeInBigDecimalParameterNamed(LoanApiConstants.emiAmountParameterName, this.fixedEmiAmount)) {
                 this.fixedEmiAmount = command.bigDecimalValueOfParameterNamed(LoanApiConstants.emiAmountParameterName);
                 actualChanges.put(LoanApiConstants.emiAmountParameterName, this.fixedEmiAmount);
@@ -1590,27 +1591,29 @@ public class Loan extends AbstractPersistable<Long> {
                             && StringUtils.isNotBlank((jsonObject.get(LoanApiConstants.disbursementIdParameterName).getAsString()))) {
                         id = jsonObject.getAsJsonPrimitive(LoanApiConstants.disbursementIdParameterName).getAsLong();
                     }
-                    if(id != null){
+                    if (id != null) {
                         LoanDisbursementDetails loanDisbursementDetail = fetchLoanDisbursementsById(id);
                         list.remove(id);
-                        if(loanDisbursementDetail.actualDisbursementDate() == null){
+                        if (loanDisbursementDetail.actualDisbursementDate() == null) {
-                        	Date actualDisbursementDate = null;
+                            Date actualDisbursementDate = null;
-                            LoanDisbursementDetails disbursementDetails = new LoanDisbursementDetails(expectedDisbursementDate, actualDisbursementDate, principal);
+                            LoanDisbursementDetails disbursementDetails = new LoanDisbursementDetails(expectedDisbursementDate,
+                                    actualDisbursementDate, principal);
                             if (!loanDisbursementDetail.equals(disbursementDetails)) {
                                 loanDisbursementDetail.copy(disbursementDetails);
                                 actualChanges.put("disbursementDetailId", id);
                                 actualChanges.put("recalculateLoanSchedule", true);
                             }
                         }
+                    } else {
+                        Date actualDisbursementDate = null;
+                        LoanDisbursementDetails disbursementDetails = new LoanDisbursementDetails(expectedDisbursementDate,
+                                actualDisbursementDate, principal);
+                        disbursementDetails.updateLoan(this);
+                        this.disbursementDetails.add(disbursementDetails);
+                        actualChanges.put(LoanApiConstants.disbursementDataParameterName, expectedDisbursementDate + "-" + principal);
+                        actualChanges.put("recalculateLoanSchedule", true);
                     }
-                    else{
+                    i++;
-                    	Date actualDisbursementDate = null;
-                        LoanDisbursementDetails disbursementDetails = new LoanDisbursementDetails(expectedDisbursementDate, actualDisbursementDate, principal);
-                            disbursementDetails.updateLoan(this);
-                            this.disbursementDetails.add(disbursementDetails);
-                            actualChanges.put(LoanApiConstants.disbursementDataParameterName, expectedDisbursementDate + "-" + principal);
-                            actualChanges.put("recalculateLoanSchedule", true);
-                    }i++;
                 } while (i < disbursementDataArray.size());
                 for (Long id : list) {
                     this.disbursementDetails.remove(fetchLoanDisbursementsById(id));
@@ -1871,8 +1874,7 @@ public class Loan extends AbstractPersistable<Long> {
     }
 
     public Map<String, Object> loanApplicationApproval(final AppUser currentUser, final JsonCommand command,
-    		final JsonArray disbursementDataArray,
+            final JsonArray disbursementDataArray, final LoanLifecycleStateMachine loanLifecycleStateMachine) {
-            final LoanLifecycleStateMachine loanLifecycleStateMachine) {
 
         validateAccountStatus(LoanEvent.LOAN_APPROVED);
 
@@ -1911,7 +1913,6 @@ public class Loan extends AbstractPersistable<Long> {
 
             BigDecimal approvedLoanAmount = command.bigDecimalValueOfParameterNamed(LoanApiConstants.approvedLoanAmountParameterName);
 
-
             if (approvedLoanAmount != null) {
 
                 // Approved amount has to be less than or equal to principal
@@ -1931,36 +1932,30 @@ public class Loan extends AbstractPersistable<Long> {
 
                     actualChanges.put(LoanApiConstants.approvedLoanAmountParameterName, approvedLoanAmount);
                     actualChanges.put(LoanApiConstants.disbursementPrincipalParameterName, approvedLoanAmount);
-                } else if(approvedLoanAmount.compareTo(this.proposedPrincipal) == 1) {
+                } else if (approvedLoanAmount.compareTo(this.proposedPrincipal) == 1) {
                     final String errorMessage = "Loan approved amount can't be greater than loan amount demanded.";
                     throw new InvalidLoanStateTransitionException("approval", "amount.can't.be.greater.than.loan.amount.demanded",
                             errorMessage, this.proposedPrincipal, approvedLoanAmount);
                 }
 
                 /* Update disbursement details */
-				if (disbursementDataArray != null) {
+                if (disbursementDataArray != null) {
-					updateDisbursementDetails(command, actualChanges);
+                    updateDisbursementDetails(command, actualChanges);
-				}
+                }
-			}
+            }
-			if (loanProduct.isMultiDisburseLoan()) {
+            if (loanProduct.isMultiDisburseLoan()) {
 
-				if (this.disbursementDetails.isEmpty()) {
+                if (this.disbursementDetails.isEmpty()) {
-					final String errorMessage = "For this loan product, disbursement details must be provided";
+                    final String errorMessage = "For this loan product, disbursement details must be provided";
-					throw new MultiDisbursementDataRequiredException(
+                    throw new MultiDisbursementDataRequiredException(LoanApiConstants.disbursementDataParameterName, errorMessage);
-							LoanApiConstants.disbursementDataParameterName,
+                }
-							errorMessage);
-				}
 
-				if (this.disbursementDetails.size() > loanProduct
+                if (this.disbursementDetails.size() > loanProduct.maxTrancheCount()) {
-						.maxTrancheCount()) {
+                    final String errorMessage = "Number of tranche shouldn't be greter than " + loanProduct.maxTrancheCount();
-					final String errorMessage = "Number of tranche shouldn't be greter than "
+                    throw new ExceedingTrancheCountException(LoanApiConstants.disbursementDataParameterName, errorMessage,
-							+ loanProduct.maxTrancheCount();
+                            loanProduct.maxTrancheCount(), disbursementDetails.size());
-					throw new ExceedingTrancheCountException(
+                }
-							LoanApiConstants.disbursementDataParameterName,
+            }
-							errorMessage, loanProduct.maxTrancheCount(),
-							disbursementDetails.size());
-				}
-			}
             this.approvedOnDate = approvedOn.toDate();
             this.approvedBy = currentUser;
             actualChanges.put("locale", command.locale());
@@ -1975,14 +1970,14 @@ public class Loan extends AbstractPersistable<Long> {
                         getApprovedOnDate(), submittalDate);
             }
 
-            if(expecteddisbursementDate != null){
+            if (expecteddisbursementDate != null) {
-            	this.expectedDisbursementDate = expecteddisbursementDate.toDate();
+                this.expectedDisbursementDate = expecteddisbursementDate.toDate();
                 actualChanges.put("expectedDisbursementDate", expectedDisbursementDate);
 
-                if(expecteddisbursementDate.isBefore(approvedOn)) {
+                if (expecteddisbursementDate.isBefore(approvedOn)) {
-                	final String errorMessage = "The expected disbursement date should be either on or after the approval date: "
+                    final String errorMessage = "The expected disbursement date should be either on or after the approval date: "
                             + approvedOn.toString();
-                	throw new InvalidLoanStateTransitionException("expecteddisbursal", "should.be.on.or.after.approval.date", errorMessage,
+                    throw new InvalidLoanStateTransitionException("expecteddisbursal", "should.be.on.or.after.approval.date", errorMessage,
                             getApprovedOnDate(), expecteddisbursementDate);
                 }
             }
@@ -2115,7 +2110,7 @@ public class Loan extends AbstractPersistable<Long> {
     public void regenerateScheduleOnDisbursement(final ScheduleGeneratorDTO scheduleGeneratorDTO, final boolean recalculateSchedule,
             final LocalDate actualDisbursementDate, BigDecimal emiAmount, final AppUser currentUser) {
         boolean isEmiAmountChanged = false;
-        if ((this.loanProduct.isMultiDisburseLoan() || this.loanProduct.canDefineInstallmentAmount ()) && emiAmount != null
+        if ((this.loanProduct.isMultiDisburseLoan() || this.loanProduct.canDefineInstallmentAmount()) && emiAmount != null
                 && emiAmount.compareTo(retriveLastEmiAmount()) != 0) {
             if (this.loanProduct.isMultiDisburseLoan()) {
                 LoanTermVariations loanVariationTerms = new LoanTermVariations(LoanTermVariationType.EMI_AMOUNT.getValue(),
@@ -2182,19 +2177,19 @@ public class Loan extends AbstractPersistable<Long> {
                     disbursementDetails.updatePrincipal(principalDisbursed);
                 }
             }
-            if(this.loanProduct().isMultiDisburseLoan()){
+            if (this.loanProduct().isMultiDisburseLoan()) {
                 Collection<LoanDisbursementDetails> loanDisburseDetails = this.getDisbursementDetails();
-            	BigDecimal setPrincipalAmount = BigDecimal.ZERO;
+                BigDecimal setPrincipalAmount = BigDecimal.ZERO;
                 for (LoanDisbursementDetails disbursementDetails : loanDisburseDetails) {
-                	setPrincipalAmount = setPrincipalAmount.add(disbursementDetails.principal());
+                    setPrincipalAmount = setPrincipalAmount.add(disbursementDetails.principal());
                 }
                 this.loanRepaymentScheduleDetail.setPrincipal(setPrincipalAmount);
-                if(setPrincipalAmount.compareTo(this.approvedPrincipal) == 1){
+                if (setPrincipalAmount.compareTo(this.approvedPrincipal) == 1) {
-                	final String errorMsg = "Loan can't be disbursed,disburse amount is exceeding approved principal ";
+                    final String errorMsg = "Loan can't be disbursed,disburse amount is exceeding approved principal ";
                     throw new LoanDisbursalException(errorMsg, "disburse.amount.must.be.less.than.approved.principal", principalDisbursed,
                             this.approvedPrincipal);
                 }
-            }else{
+            } else {
                 this.loanRepaymentScheduleDetail.setPrincipal(this.loanRepaymentScheduleDetail.getPrincipal().minus(diff).getAmount());
             }
             if (!(this.loanProduct().isMultiDisburseLoan()) && diff.compareTo(BigDecimal.ZERO) == -1) {
@@ -2437,8 +2432,8 @@ public class Loan extends AbstractPersistable<Long> {
                     getApprovedOnDate());
         }
 
-        if (getExpectedFirstRepaymentOnDate() != null && disbursedOn.isAfter(getExpectedFirstRepaymentOnDate()) &&
+        if (getExpectedFirstRepaymentOnDate() != null && disbursedOn.isAfter(getExpectedFirstRepaymentOnDate())
-        		disbursedOn.toDate().equals(this.actualDisbursementDate)) {
+                && disbursedOn.toDate().equals(this.actualDisbursementDate)) {
             final String errorMessage = "submittedOnDate cannot be after the loans  expectedFirstRepaymentOnDate: "
                     + getExpectedFirstRepaymentOnDate().toString();
             throw new InvalidLoanStateTransitionException("disbursal", "cannot.be.after.expected.first.repayment.date", errorMessage,
@@ -4130,9 +4125,10 @@ public class Loan extends AbstractPersistable<Long> {
         return AccountType.fromInt(this.loanType).isGroupAccount();
     }
 
-    public boolean isJLGLoan(){
+    public boolean isJLGLoan() {
-    	return AccountType.fromInt(this.loanType).isJLGAccount();
+        return AccountType.fromInt(this.loanType).isJLGAccount();
     }
+
     public void updateInterestRateFrequencyType() {
         this.loanRepaymentScheduleDetail.updatenterestPeriodFrequencyType(this.loanProduct.getInterestPeriodFrequencyType());
     }
@@ -4478,22 +4474,24 @@ public class Loan extends AbstractPersistable<Long> {
             final Map<String, Object> actualChanges, final ScheduleGeneratorDTO scheduleGeneratorDTO, final AppUser currentUser) {
         final Locale locale = command.extractLocale();
         validateAccountStatus(LoanEvent.LOAN_EDIT_MULTI_DISBURSE_DATE);
-        final BigDecimal principal = command.bigDecimalValueOfParameterNamed(LoanApiConstants.updatedDisbursementPrincipalParameterName, locale);
+        final BigDecimal principal = command.bigDecimalValueOfParameterNamed(LoanApiConstants.updatedDisbursementPrincipalParameterName,
-        final LocalDate expectedDisbursementDate = command.localDateValueOfParameterNamed(LoanApiConstants.updatedDisbursementDateParameterName);
+                locale);
+        final LocalDate expectedDisbursementDate = command
+                .localDateValueOfParameterNamed(LoanApiConstants.updatedDisbursementDateParameterName);
         disbursementDetails.updateExpectedDisbursementDateAndAmount(expectedDisbursementDate.toDate(), principal);
         actualChanges.put(LoanApiConstants.disbursementDateParameterName,
                 command.stringValueOfParameterNamed(LoanApiConstants.disbursementDateParameterName));
         actualChanges.put(LoanApiConstants.disbursementIdParameterName,
                 command.stringValueOfParameterNamed(LoanApiConstants.disbursementIdParameterName));
         actualChanges.put(LoanApiConstants.disbursementPrincipalParameterName,
-        		command.bigDecimalValueOfParameterNamed(LoanApiConstants.disbursementPrincipalParameterName, locale));
+                command.bigDecimalValueOfParameterNamed(LoanApiConstants.disbursementPrincipalParameterName, locale));
         existingTransactionIds.addAll(findExistingTransactionIds());
         existingReversedTransactionIds.addAll(findExistingReversedTransactionIds());
 
         Collection<LoanDisbursementDetails> loanDisburseDetails = this.getDisbursementDetails();
-    	BigDecimal setPrincipalAmount = BigDecimal.ZERO;
+        BigDecimal setPrincipalAmount = BigDecimal.ZERO;
         for (LoanDisbursementDetails details : loanDisburseDetails) {
-        	setPrincipalAmount = setPrincipalAmount.add(details.principal());
+            setPrincipalAmount = setPrincipalAmount.add(details.principal());
         }
 
         this.loanRepaymentScheduleDetail.setPrincipal(setPrincipalAmount);