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ankurkaushalankurkaushal
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Reformat business-delegate, callback, chain, command, composite, dao, decorator & dependency-injection patterns.
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‎business-delegate/src/main/java/com/iluwatar/business/delegate/App.java‎

Lines changed: 25 additions & 23 deletions
Original file line numberDiff line numberDiff line change
@@ -2,34 +2,36 @@
22

33
/**
44
*
5-
* The Business Delegate pattern adds an abstraction layer between the presentation and business tiers.
6-
* By using the pattern we gain loose coupling between the tiers. The Business Delegate encapsulates
7-
* knowledge about how to locate, connect to, and interact with the business objects that make up
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* the application.
5+
* The Business Delegate pattern adds an abstraction layer between the presentation and business
6+
* tiers. By using the pattern we gain loose coupling between the tiers. The Business Delegate
7+
* encapsulates knowledge about how to locate, connect to, and interact with the business objects
8+
* that make up the application.
99
* <p>
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* Some of the services the Business Delegate uses are instantiated directly, and some can be retrieved
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* through service lookups. The Business Delegate itself may contain business logic too potentially tying
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* together multiple service calls, exception handling, retrying etc.
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* Some of the services the Business Delegate uses are instantiated directly, and some can be
11+
* retrieved through service lookups. The Business Delegate itself may contain business logic too
12+
* potentially tying together multiple service calls, exception handling, retrying etc.
1313
* <p>
14-
* In this example the client ({@link Client}) utilizes a business delegate ({@link BusinessDelegate}) to execute a task.
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* The Business Delegate then selects the appropriate service and makes the service call.
14+
* In this example the client ({@link Client}) utilizes a business delegate (
15+
* {@link BusinessDelegate}) to execute a task. The Business Delegate then selects the appropriate
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* service and makes the service call.
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*
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*/
1819
public class App {
19-
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/**
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* Program entry point
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* @param args command line args
23-
*/
24-
public static void main(String[] args) {
25-
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BusinessDelegate businessDelegate = new BusinessDelegate();
27-
businessDelegate.setServiceType(ServiceType.EJB);
2820

29-
Client client = new Client(businessDelegate);
30-
client.doTask();
21+
/**
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* Program entry point
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*
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* @param args command line args
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*/
26+
public static void main(String[] args) {
3127

32-
businessDelegate.setServiceType(ServiceType.JMS);
33-
client.doTask();
34-
}
28+
BusinessDelegate businessDelegate = new BusinessDelegate();
29+
businessDelegate.setServiceType(ServiceType.EJB);
30+
31+
Client client = new Client(businessDelegate);
32+
client.doTask();
33+
34+
businessDelegate.setServiceType(ServiceType.JMS);
35+
client.doTask();
36+
}
3537
}

‎business-delegate/src/main/java/com/iluwatar/business/delegate/BusinessDelegate.java‎

Lines changed: 11 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -6,17 +6,17 @@
66
*
77
*/
88
public class BusinessDelegate {
9-
10-
private BusinessLookup lookupService = new BusinessLookup();
11-
private BusinessService businessService;
12-
private ServiceType serviceType;
139

14-
public void setServiceType(ServiceType serviceType) {
15-
this.serviceType = serviceType;
16-
}
10+
private BusinessLookup lookupService = new BusinessLookup();
11+
private BusinessService businessService;
12+
private ServiceType serviceType;
1713

18-
public void doTask() {
19-
businessService = lookupService.getBusinessService(serviceType);
20-
businessService.doProcessing();
21-
}
14+
public void setServiceType(ServiceType serviceType) {
15+
this.serviceType = serviceType;
16+
}
17+
18+
public void doTask() {
19+
businessService = lookupService.getBusinessService(serviceType);
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businessService.doProcessing();
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}
2222
}

‎business-delegate/src/main/java/com/iluwatar/business/delegate/BusinessLookup.java‎

Lines changed: 7 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -7,11 +7,11 @@
77
*/
88
public class BusinessLookup {
99

10-
public BusinessService getBusinessService(ServiceType serviceType) {
11-
if (serviceType.equals(ServiceType.EJB)) {
12-
return new EjbService();
13-
} else {
14-
return new JmsService();
15-
}
16-
}
10+
public BusinessService getBusinessService(ServiceType serviceType) {
11+
if (serviceType.equals(ServiceType.EJB)) {
12+
return new EjbService();
13+
} else {
14+
return new JmsService();
15+
}
16+
}
1717
}

‎business-delegate/src/main/java/com/iluwatar/business/delegate/BusinessService.java‎

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -7,5 +7,5 @@
77
*/
88
public interface BusinessService {
99

10-
void doProcessing();
10+
void doProcessing();
1111
}

‎business-delegate/src/main/java/com/iluwatar/business/delegate/Client.java‎

Lines changed: 7 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -7,13 +7,13 @@
77
*/
88
public class Client {
99

10-
private BusinessDelegate businessDelegate;
10+
private BusinessDelegate businessDelegate;
1111

12-
public Client(BusinessDelegate businessDelegate) {
13-
this.businessDelegate = businessDelegate;
14-
}
12+
public Client(BusinessDelegate businessDelegate) {
13+
this.businessDelegate = businessDelegate;
14+
}
1515

16-
public void doTask() {
17-
businessDelegate.doTask();
18-
}
16+
public void doTask() {
17+
businessDelegate.doTask();
18+
}
1919
}

‎business-delegate/src/main/java/com/iluwatar/business/delegate/EjbService.java‎

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -7,8 +7,8 @@
77
*/
88
public class EjbService implements BusinessService {
99

10-
@Override
11-
public void doProcessing() {
12-
System.out.println("EjbService is now processing");
13-
}
10+
@Override
11+
public void doProcessing() {
12+
System.out.println("EjbService is now processing");
13+
}
1414
}

‎business-delegate/src/main/java/com/iluwatar/business/delegate/JmsService.java‎

Lines changed: 4 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -7,8 +7,8 @@
77
*/
88
public class JmsService implements BusinessService {
99

10-
@Override
11-
public void doProcessing() {
12-
System.out.println("JmsService is now processing");
13-
}
10+
@Override
11+
public void doProcessing() {
12+
System.out.println("JmsService is now processing");
13+
}
1414
}

‎business-delegate/src/main/java/com/iluwatar/business/delegate/ServiceType.java‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -6,6 +6,6 @@
66
*
77
*/
88
public enum ServiceType {
9-
10-
EJB, JMS;
9+
10+
EJB, JMS;
1111
}

‎business-delegate/src/test/java/com/iluwatar/business/delegate/AppTest.java‎

Lines changed: 6 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -10,10 +10,10 @@
1010
*
1111
*/
1212
public class AppTest {
13-
14-
@Test
15-
public void test() {
16-
String[] args = {};
17-
App.main(args);
18-
}
13+
14+
@Test
15+
public void test() {
16+
String[] args = {};
17+
App.main(args);
18+
}
1919
}

‎callback/src/main/java/com/iluwatar/callback/App.java‎

Lines changed: 13 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -2,20 +2,21 @@
22

33
/**
44
*
5-
* Callback pattern is more native for functional languages where functions are treated as first-class citizens.
6-
* Prior to Java 8 callbacks can be simulated using simple (alike command) interfaces.
5+
* Callback pattern is more native for functional languages where functions are treated as
6+
* first-class citizens. Prior to Java 8 callbacks can be simulated using simple (alike command)
7+
* interfaces.
78
*
89
*/
910
public class App {
1011

11-
public static void main(String[] args) {
12-
Task task = new SimpleTask();
13-
Callback callback = new Callback() {
14-
@Override
15-
public void call() {
16-
System.out.println("I'm done now.");
17-
}
18-
};
19-
task.executeWith(callback);
20-
}
12+
public static void main(String[] args) {
13+
Task task = new SimpleTask();
14+
Callback callback = new Callback() {
15+
@Override
16+
public void call() {
17+
System.out.println("I'm done now.");
18+
}
19+
};
20+
task.executeWith(callback);
21+
}
2122
}

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