BAEL 717 - Singleton Session Bean (#4104)

* BAEL-717: Singleton EJB Bean

Files for BAEL-717:Singleton EJB Bean.

* BAEL-717: Singleton EJB Bean

Corrected Indentation.

* BAEL-717: Singleton EJB Bean

Corrected Indentation.

* BAEL-717: Singleton EJB Bean

Corrected Indentation.

* BAEL-717: Singleton EJB Bean

Corrected Indentation.

* BAEL-717: Singleton EJB Bean

Changed artifactId value.

* BAEL-717: Singleton EJB Bean.

Added module for Singleton EJB Bean.

* BAEL-717: Singleton EJB Bean. 

Removed Singleton EJB Bean Module.

* BAEL-717: Singleton EJB Bean

Changed the JNDI Lookup name.

* BAEL-717: Singleton EJB Bean. 

Added the "singleton-ejb-bean" module.

* BAEL-717: Singleton EJB Bean.

Corrected Indentation.

* BAEL-717: Singleton EJB Bean

Corrected Indentation.

* BAEL-717: Singleton EJB Bean.

Corrected Indentation.

* BAEL-717: Singleton EJB Bean.

Corrected Indentation.

* BAEL-717:Singleton EJB Bean.

Corrected Indentation.

* BAEL-717:Singleton EJB Bean.

Corrected Indentation.

* BAEL-717: Singleton Session Bean.

Added class for Bean-Managed concurrrency.
Changed class name from CountryStateCacheBean to CountryStateContainerManagedBean.

* BAEL-717: Singleton Session Bean.

Changing the name of the class to CountryStateContainerManagedBean.

* BAEL-717: Singleton Session Bean.

Added method to test Bean-Managed concurrency.

* Get Latest.

* deleting CountryStateBeanManagedBean for new file.

* deleting CountryStateCacheBean for new file.

* deleting CountryStateContainerManagedBean for new file.

* BAEL-717: Singleton Session Bean.

Adding file for Bean with Bean-Managed concurrency.
Changing file name for original file to CountryStateContainerManagedBean with Container-Managed concurrency.

* Deleting file for new checkin.

* BAEL-717: Singleton Session Bean.

Added test case for Bean-Manged concurrency.
Change in JNDI names.

* BAEL-717: Singleton Session Bean.

Changed the assert method parameter order and null check in test cases.

* BAEL-717:Singleton Session Bean

Removed volatile keyword for the variable countryStatesMap. Marking it as final.

* BAEL 717 - Singleton EJB Bean

Added new method setStates().

* BAEL-717: Singleton Session Bean.

Renaming directory singleton-ejb-bean to ejb-beans.

* BAEL-717: Singleton EJB Beans.

Renaming directory name from singleton-ejb-bean to ejb-beans.

* BAEL-717: Singleton Session Bean

Renaming directory singleton-ejb-bean to ejb-beans.

spring-ejb/ejb-beans/src/main/java/com/baeldung/singletonbean/CountryState.java

@@ -9,4 +9,6 @@ public interface CountryState {
 
     public List<String> getStates(String country);
     
+    public void setStates(String country, List<String> states);
+
 }

spring-ejb/ejb-beans/src/main/java/com/baeldung/singletonbean/CountryStateBeanManagedBean.java

@@ -19,7 +19,7 @@ public class CountryStateBeanManagedBean implements CountryState {
     private final Map<String, List<String>> countryStatesMap = new HashMap<String, List<String>>();
 
     @PostConstruct
-    public synchronized void initialize() {
+    public void initialize() {
 
         List<String> states = new ArrayList<String>();
         states.add("Texas");
@@ -34,4 +34,8 @@ public class CountryStateBeanManagedBean implements CountryState {
     public List<String> getStates(String country) {
         return countryStatesMap.get(country);
     }
+
+    public synchronized void setStates(String country, List<String> states) {
+        countryStatesMap.put(country, states);
+    }
 }

spring-ejb/ejb-beans/src/main/java/com/baeldung/singletonbean/CountryStateContainerManagedBean.java

@@ -38,4 +38,9 @@ public class CountryStateContainerManagedBean implements CountryState {
     public List<String> getStates(String country) {
         return countryStatesMap.get(country);
     }
+
+    @Lock(LockType.WRITE)
+    public void setStates(String country, List<String> states) {
+        countryStatesMap.put(country, states);
+    }
 }

spring-ejb/ejb-beans/src/test/java/com/baeldung/singletonbean/CountryStateCacheBeanTest.java

@@ -3,6 +3,8 @@ package com.baeldung.singletonbean;
 import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertNotNull;
 
+import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 
 import javax.ejb.embeddable.EJBContainer;
@@ -30,7 +32,7 @@ public class CountryStateCacheBeanTest {
 
         String[] expectedStates = { "Texas", "Alabama", "Alaska", "Arizona", "Arkansas" };
 
-        CountryState countryStateBean = (CountryState) context.lookup("java:global/singleton-ejb-bean/CountryStateContainerManagedBean");
+        CountryState countryStateBean = (CountryState) context.lookup("java:global/ejb-beans/CountryStateContainerManagedBean");
         List<String> actualStates = countryStateBean.getStates("UnitedStates");
         assertNotNull(actualStates);
         assertArrayEquals(expectedStates, actualStates.toArray());
@@ -41,7 +43,33 @@ public class CountryStateCacheBeanTest {
 
         String[] expectedStates = { "Texas", "Alabama", "Alaska", "Arizona", "Arkansas" };
 
-        CountryState countryStateBean = (CountryState) context.lookup("java:global/singleton-ejb-bean/CountryStateBeanManagedBean");
+        CountryState countryStateBean = (CountryState) context.lookup("java:global/ejb-beans/CountryStateBeanManagedBean");
+        List<String> actualStates = countryStateBean.getStates("UnitedStates");
+        assertNotNull(actualStates);
+        assertArrayEquals(expectedStates, actualStates.toArray());
+    }
+    
+    @Test
+    public void whenCallSetStatesFromContainerManagedBean_SetsStatesForCountry() throws Exception {
+        
+        String[] expectedStates = { "California", "Florida", "Hawaii", "Pennsylvania", "Michigan" };
+        
+        CountryState countryStateBean = (CountryState) context.lookup("java:global/ejb-beans/CountryStateContainerManagedBean");
+        countryStateBean.setStates("UnitedStates", Arrays.asList(expectedStates));
+        
+        List<String> actualStates = countryStateBean.getStates("UnitedStates");
+        assertNotNull(actualStates);
+        assertArrayEquals(expectedStates, actualStates.toArray());
+    }
+    
+    @Test
+    public void whenCallSetStatesFromBeanManagedBean_SetsStatesForCountry() throws Exception {
+        
+        String[] expectedStates = { "California", "Florida", "Hawaii", "Pennsylvania", "Michigan" };
+        
+        CountryState countryStateBean = (CountryState) context.lookup("java:global/ejb-beans/CountryStateBeanManagedBean");
+        countryStateBean.setStates("UnitedStates", Arrays.asList(expectedStates));
+        
         List<String> actualStates = countryStateBean.getStates("UnitedStates");
         assertNotNull(actualStates);
         assertArrayEquals(expectedStates, actualStates.toArray());

spring-ejb/pom.xml

@@ -73,6 +73,6 @@
     <modules>
         <module>ejb-remote-for-spring</module>
         <module>spring-ejb-client</module>
-        <module>singleton-ejb-bean</module>
+        <module>ejb-beans</module>
     </modules>
 </project>