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.
2018-05-20 03:16:46 -05:00
parent 0f960f423d
commit f1129ea16b
6 changed files with 46 additions and 7 deletions
@@ -0,0 +1,14 @@
+package com.baeldung.singletonbean;
+
+import java.util.List;
+
+import javax.ejb.Local;
+
+@Local
+public interface CountryState {
+
+    public List<String> getStates(String country);
+    
+    public void setStates(String country, List<String> states);
+
+}
@@ -0,0 +1,41 @@
+package com.baeldung.singletonbean;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.annotation.PostConstruct;
+import javax.ejb.ConcurrencyManagement;
+import javax.ejb.ConcurrencyManagementType;
+import javax.ejb.Singleton;
+import javax.ejb.Startup;
+
+@Singleton
+@Startup
+@ConcurrencyManagement(ConcurrencyManagementType.BEAN)
+public class CountryStateBeanManagedBean implements CountryState {
+
+    private final Map<String, List<String>> countryStatesMap = new HashMap<String, List<String>>();
+
+    @PostConstruct
+    public void initialize() {
+
+        List<String> states = new ArrayList<String>();
+        states.add("Texas");
+        states.add("Alabama");
+        states.add("Alaska");
+        states.add("Arizona");
+        states.add("Arkansas");
+
+        countryStatesMap.put("UnitedStates", states);
+    }
+
+    public List<String> getStates(String country) {
+        return countryStatesMap.get(country);
+    }
+
+    public synchronized void setStates(String country, List<String> states) {
+        countryStatesMap.put(country, states);
+    }
+}
@@ -0,0 +1,46 @@
+package com.baeldung.singletonbean;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.annotation.PostConstruct;
+import javax.ejb.ConcurrencyManagement;
+import javax.ejb.ConcurrencyManagementType;
+import javax.ejb.Lock;
+import javax.ejb.LockType;
+import javax.ejb.Singleton;
+import javax.ejb.Startup;
+
+@Singleton
+@Startup
+@ConcurrencyManagement(ConcurrencyManagementType.CONTAINER)
+public class CountryStateContainerManagedBean implements CountryState {
+
+    private Map<String, List<String>> countryStatesMap = new HashMap<String, List<String>>();
+
+    @Lock(LockType.WRITE)
+    @PostConstruct
+    public void initialize() {
+
+        List<String> states = new ArrayList<String>();
+        states.add("Texas");
+        states.add("Alabama");
+        states.add("Alaska");
+        states.add("Arizona");
+        states.add("Arkansas");
+
+        countryStatesMap.put("UnitedStates", states);
+    }
+
+    @Lock(LockType.READ)
+    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);
+    }
+}
@@ -0,0 +1,83 @@
+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;
+import javax.naming.Context;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+public class CountryStateCacheBeanTest {
+
+    private EJBContainer ejbContainer = null;
+
+    private Context context = null;
+
+    @Before
+    public void init() {
+
+        ejbContainer = EJBContainer.createEJBContainer();
+        context = ejbContainer.getContext();
+    }
+    
+    @Test
+    public void whenCallGetStatesFromContainerManagedBean_ReturnsStatesForCountry() throws Exception {
+
+        String[] expectedStates = { "Texas", "Alabama", "Alaska", "Arizona", "Arkansas" };
+
+        CountryState countryStateBean = (CountryState) context.lookup("java:global/ejb-beans/CountryStateContainerManagedBean");
+        List<String> actualStates = countryStateBean.getStates("UnitedStates");
+        assertNotNull(actualStates);
+        assertArrayEquals(expectedStates, actualStates.toArray());
+    }
+    
+    @Test
+    public void whenCallGetStatesFromBeanManagedBean_ReturnsStatesForCountry() throws Exception {
+
+        String[] expectedStates = { "Texas", "Alabama", "Alaska", "Arizona", "Arkansas" };
+
+        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());
+    }
+    
+    @After
+    public void close() {
+        if (ejbContainer != null)
+            ejbContainer.close();
+    }
+}