Integration Test

2026-05-16 00:59:02 +00:00 · 2017-08-19 22:06:35 +03:00
parent 671230d798
commit 82d7e57e8e
21 changed files with 181 additions and 46 deletions
@@ -20,14 +20,14 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-package com.iluwatar.event.sourcing.service;
+package com.iluwatar.event.sourcing;

 import com.iluwatar.event.sourcing.api.EventProcessor;
 import com.iluwatar.event.sourcing.event.AccountCreateEvent;
 import java.util.Date;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class AccountService {

@@ -20,7 +20,7 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-package com.iluwatar.event.sourcing.service;
+package com.iluwatar.event.sourcing;

 import com.iluwatar.event.sourcing.api.EventProcessor;
 import com.iluwatar.event.sourcing.event.MoneyDepositEvent;
@@ -30,7 +30,7 @@ import java.math.BigDecimal;
 import java.util.Date;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class MoneyTransactionService {

@@ -20,10 +20,10 @@
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
-package com.iluwatar.event.sourcing.service;
+package com.iluwatar.event.sourcing;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class SequenceIdGenerator {

@@ -25,7 +25,7 @@ package com.iluwatar.event.sourcing.api;
 import java.io.Serializable;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public abstract class DomainEvent implements Serializable {

@@ -23,7 +23,7 @@
 package com.iluwatar.event.sourcing.api;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public interface EventProcessor {

@@ -23,7 +23,7 @@
 package com.iluwatar.event.sourcing.api;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public interface ProcessorJournal {

@@ -24,62 +24,82 @@ package com.iluwatar.event.sourcing.app;

 import com.iluwatar.event.sourcing.journal.JsonFileJournal;
 import com.iluwatar.event.sourcing.processor.DomainEventProcessor;
-import com.iluwatar.event.sourcing.service.AccountService;
-import com.iluwatar.event.sourcing.service.MoneyTransactionService;
+import com.iluwatar.event.sourcing.AccountService;
+import com.iluwatar.event.sourcing.MoneyTransactionService;
 import com.iluwatar.event.sourcing.state.AccountAggregate;
 import java.math.BigDecimal;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;

 /**
- * Created by serdarh on 06.08.2017.
+ * Event Sourcing : Instead of storing just the current state of the data in a domain, use an
+ * append-only store to record the full series of actions taken on that data. The store acts as the
+ * system of record and can be used to materialize the domain objects. This can simplify tasks in
+ * complex domains, by avoiding the need to synchronize the data model and the business domain,
+ * while improving performance, scalability, and responsiveness. It can also provide consistency for
+ * transactional data, and maintain full audit trails and history that can enable compensating
+ * actions.
+ *
+ * This App class is an example usage of Event Sourcing pattern. As an example, two bank account is
+ * created, then some money deposit and transfer actions are taken so a new state of accounts is
+ * created. At that point, state is cleared in order to represent a system shot down. After the shot
+ * down, system state is recovered by re-creating the past events from event journal. Then state is
+ * printed so a user can view the last state is same with the state before system shot down.
+ *
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class App {

+  private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
+  public static final int ACCOUNT_OF_DAENERYS = 1;
+  public static final int ACCOUNT_OF_JON = 2;
+
  /**
   * The entry point of application.
   *
   * @param args the input arguments
   */
  public static void main(String[] args) {
-    System.out.println("Running the system first time............");

    DomainEventProcessor domainEventProcessor = new DomainEventProcessor();
    JsonFileJournal jsonFileJournal = new JsonFileJournal();
-    jsonFileJournal.reset();
    domainEventProcessor.setPrecessorJournal(jsonFileJournal);
-
-    System.out.println("Creating th accounts............");
-
    AccountService accountService = new AccountService(domainEventProcessor);
    MoneyTransactionService moneyTransactionService = new MoneyTransactionService(
        domainEventProcessor);
-    accountService.createAccount(1, "Daenerys Targaryen");
-    accountService.createAccount(2, "Jon Snow");

-    System.out.println("Do some money operations............");
+    LOGGER.info("Running the system first time............");
+    jsonFileJournal.reset();

-    moneyTransactionService.depositMoney(1, new BigDecimal("100000"));
-    moneyTransactionService.depositMoney(2, new BigDecimal("100"));
+    LOGGER.info("Creating th accounts............");

-    moneyTransactionService.transferMoney(1, 2, new BigDecimal("10000"));
-    moneyTransactionService.withdrawalMoney(2, new BigDecimal("1000"));
+    accountService.createAccount(ACCOUNT_OF_DAENERYS, "Daenerys Targaryen");
+    accountService.createAccount(ACCOUNT_OF_JON, "Jon Snow");

-    System.out.println("...............State:............");
-    System.out.println(AccountAggregate.getAccount(1));
-    System.out.println(AccountAggregate.getAccount(2));
+    LOGGER.info("Do some money operations............");

-    System.out.println("At that point system goes down state in memory cleared............");
+    moneyTransactionService.depositMoney(ACCOUNT_OF_DAENERYS, new BigDecimal("100000"));
+    moneyTransactionService.depositMoney(ACCOUNT_OF_JON, new BigDecimal("100"));

+    moneyTransactionService.transferMoney(ACCOUNT_OF_DAENERYS, ACCOUNT_OF_JON, new BigDecimal("10000"));
+    moneyTransactionService.withdrawalMoney(ACCOUNT_OF_JON, new BigDecimal("1000"));
+
+    LOGGER.info("...............State:............");
+    LOGGER.info(AccountAggregate.getAccount(ACCOUNT_OF_DAENERYS).toString());
+    LOGGER.info(AccountAggregate.getAccount(ACCOUNT_OF_JON).toString());
+
+    LOGGER.info("At that point system had a shot down, state in memory is cleared............");
    AccountAggregate.resetState();

-    System.out.println("Recover the syste by the events in journal file............");
+    LOGGER.info("Recover the system by the events in journal file............");

    domainEventProcessor = new DomainEventProcessor();
    jsonFileJournal = new JsonFileJournal();
    domainEventProcessor.setPrecessorJournal(jsonFileJournal);
    domainEventProcessor.recover();

-    System.out.println("...............State Recovered:............");
-    System.out.println(AccountAggregate.getAccount(1));
-    System.out.println(AccountAggregate.getAccount(2));
+    LOGGER.info("...............Recovered State:............");
+    LOGGER.info(AccountAggregate.getAccount(ACCOUNT_OF_DAENERYS).toString());
+    LOGGER.info(AccountAggregate.getAccount(ACCOUNT_OF_JON).toString());
  }
 }
@@ -33,7 +33,7 @@ import java.util.ArrayList;
 import java.util.List;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class Account {

@@ -25,7 +25,7 @@ package com.iluwatar.event.sourcing.domain;
 import java.math.BigDecimal;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class Transaction {

@@ -27,7 +27,7 @@ import com.iluwatar.event.sourcing.domain.Account;
 import com.iluwatar.event.sourcing.state.AccountAggregate;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class AccountCreateEvent extends DomainEvent {

@@ -28,7 +28,7 @@ import com.iluwatar.event.sourcing.state.AccountAggregate;
 import java.math.BigDecimal;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class MoneyDepositEvent extends DomainEvent {

@@ -28,7 +28,7 @@ import com.iluwatar.event.sourcing.state.AccountAggregate;
 import java.math.BigDecimal;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class MoneyTransferEvent extends DomainEvent {

@@ -28,7 +28,7 @@ import com.iluwatar.event.sourcing.state.AccountAggregate;
 import java.math.BigDecimal;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class MoneyWithdrawalEvent extends DomainEvent {

@@ -25,7 +25,7 @@ package com.iluwatar.event.sourcing.gateway;
 import com.iluwatar.event.sourcing.domain.Account;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class AccountCreateContractSender {

@@ -23,7 +23,7 @@
 package com.iluwatar.event.sourcing.gateway;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class Gateways {

@@ -25,7 +25,7 @@ package com.iluwatar.event.sourcing.gateway;
 import com.iluwatar.event.sourcing.domain.Transaction;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class TransactionLogger {

@@ -44,7 +44,7 @@ import java.util.ArrayList;
 import java.util.List;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class JsonFileJournal implements ProcessorJournal {

@@ -27,7 +27,7 @@ import com.iluwatar.event.sourcing.api.EventProcessor;
 import com.iluwatar.event.sourcing.api.ProcessorJournal;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class DomainEventProcessor implements EventProcessor {

@@ -27,7 +27,7 @@ import java.util.HashMap;
 import java.util.Map;

 /**
- * Created by serdarh on 06.08.2017.
+ * Created by Serdar Hamzaogullari on 06.08.2017.
 */
 public class AccountAggregate {