Added my files

blog-web/pom.xml

@@ -35,6 +35,16 @@
             <version>2.17</version>
             <scope>test</scope>
         </dependency>
+				<dependency>
+    <groupId>org.hibernate</groupId>
+    <artifactId>hibernate-core</artifactId>
+    <version>5.4.2.Final</version>
+</dependency>
+<dependency>
+    <groupId>com.oracle</groupId>
+    <artifactId>ojdbc6</artifactId>
+    <version>12.6</version>
+</dependency>
     </dependencies>
 
     <build>

blog-web/src/main/java/com/pierceecom/blog/JAXRSConfiguration.java

@@ -2,15 +2,29 @@
 
 import java.util.HashSet;
 import java.util.Set;
+
 import javax.ws.rs.ApplicationPath;
 import javax.ws.rs.core.Application;
 
+
+
 @ApplicationPath("/")
 public class JAXRSConfiguration  extends Application {
     @Override
     public Set<Class<?>> getClasses() {
         HashSet<Class<?>> classes = new HashSet<>();
         classes.add(HelloPierceResource.class);
+        classes.add(com.pierceecom.resource.BlogPostResource.class);
+        classes.add(com.pierceecom.exceptionmappers.IllegalArgumentExceptionMapper.class);
+        classes.add(com.pierceecom.exceptionmappers.DataNotFoundExceptionMapper.class);
+        classes.add(com.pierceecom.exceptionmappers.OptimisticLockExceptionMapper.class);
+        classes.add(com.pierceecom.exceptionmappers.NotAllowedExceptionMapper.class);
+        classes.add(com.pierceecom.exceptionmappers.GenericExceptionMapper.class);
+
+
+
+
+
         return classes;
     }
 }

blog-web/src/main/java/com/pierceecom/dao/PostDAO.java

@@ -0,0 +1,86 @@
+package com.pierceecom.dao;
+import java.util.List;
+
+
+
+import org.hibernate.Session;
+import org.hibernate.Transaction;
+import com.pierceecom.model.Post;
+
+public class PostDAO {
+
+	private Session currentSession;
+
+    private Transaction currentTransaction;
+	public PostDAO() {
+
+	}
+
+
+	   public Session openCurrentSession() {
+	        currentSession = SessionFactoryHelper.getSessionFactory().openSession();
+	        return currentSession;
+	    }
+
+	    public Session openCurrentSessionwithTransaction() {
+	        currentSession = SessionFactoryHelper.getSessionFactory().openSession();
+	        currentTransaction = currentSession.beginTransaction();
+	        return currentSession;
+	    }
+
+    public void closeCurrentSession() {
+        currentSession.close();
+    }
+
+    public void closeCurrentSessionwithTransaction() {
+        currentTransaction.commit();
+        currentSession.close();
+    }
+
+
+    public Session getCurrentSession() {
+        return currentSession;
+    }
+
+    public void setCurrentSession(Session currentSession) {
+        this.currentSession = currentSession;
+    }
+
+    public Transaction getCurrentTransaction() {
+        return currentTransaction;
+    }
+
+    public void setCurrentTransaction(Transaction currentTransaction) {
+        this.currentTransaction = currentTransaction;
+    }
+
+    public void persist(Post entity) {
+        getCurrentSession().save(entity);
+    }
+
+    public void update(Post entity) {
+        getCurrentSession().update(entity);
+    }
+
+    public Post findById(String id) {
+        Post post = (Post) getCurrentSession().get(Post.class, id);
+        return post; 
+    }
+
+    public void delete(Post entity) {
+        getCurrentSession().delete(entity);
+    }
+
+    @SuppressWarnings("unchecked")
+    public List<Post> findAll() {
+        List<Post> posts = (List<Post>) getCurrentSession().createQuery("from Post").list();
+        return posts;
+    }
+
+    public void deleteAll() {
+        List<Post> entityList = findAll();
+        for (Post entity : entityList) {
+            delete(entity);
+        }
+    }
+}

blog-web/src/main/java/com/pierceecom/dao/SessionFactoryHelper.java

@@ -0,0 +1,40 @@
+package com.pierceecom.dao;
+
+import org.hibernate.Session;
+import org.hibernate.SessionFactory;
+import org.hibernate.cfg.Configuration;
+
+public class SessionFactoryHelper {
+	private static final SessionFactory sessionFactory;
+
+	static {
+		try {
+			// Build a SessionFactory object from session-factory config
+			// defined in the hibernate.cfg.xml file. In this file we
+			// register the JDBC connection information, connection pool,
+			// the hibernate dialect that we used and the mapping to our
+			// hbm.xml file for each pojo (plain old java object).
+			Configuration config = new Configuration();
+			sessionFactory = config.configure().buildSessionFactory();
+		} catch (Throwable e) {
+			System.err.println("Error in creating SessionFactory object."
+					+ e.getMessage());
+			throw new ExceptionInInitializerError(e);
+		}
+	}
+
+	public static void main(String[] args) {
+		Session session = SessionFactoryHelper.getSessionFactory()
+				.getCurrentSession();
+
+		System.out.println("session = " + session);
+	}
+
+	/**
+	 * A static method for other application to get SessionFactory object
+	 * initialized in this helper class.
+	 */
+	public static SessionFactory getSessionFactory() {
+		return sessionFactory;
+	}
+}

blog-web/src/main/java/com/pierceecom/exceptionmappers/DataNotFoundExceptionMapper.java

@@ -0,0 +1,22 @@
+package com.pierceecom.exceptionmappers;
+
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.Status;
+import javax.ws.rs.ext.ExceptionMapper;
+import javax.ws.rs.ext.Provider;
+
+import com.pierceecom.exceptions.DataNotFoundException;
+import com.pierceecom.model.ErrorMessage;
+
+@Provider
+public class DataNotFoundExceptionMapper implements ExceptionMapper<DataNotFoundException> {
+	@Override
+	public Response toResponse(DataNotFoundException ex){
+
+		ErrorMessage errorMessage =new ErrorMessage(ex.getMessage(),204,"");
+		return Response.status(Status.NOT_FOUND).entity(errorMessage).build();
+
+	}
+
+
+}

blog-web/src/main/java/com/pierceecom/exceptionmappers/GenericExceptionMapper.java

@@ -0,0 +1,22 @@
+package com.pierceecom.exceptionmappers;
+
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.Status;
+import javax.ws.rs.ext.ExceptionMapper;
+import javax.ws.rs.ext.Provider;
+
+import com.pierceecom.model.ErrorMessage;
+
+@Provider
+public class GenericExceptionMapper implements ExceptionMapper<Throwable> {
+	@Override
+	public Response toResponse(Throwable ex){
+
+	ErrorMessage errorMessage =new ErrorMessage("Internal Server Error", 500, "#/definitions/Post");
+	return Response.status(Status.INTERNAL_SERVER_ERROR).entity(errorMessage).type(MediaType.APPLICATION_JSON).build();
+
+}
+
+}
+

blog-web/src/main/java/com/pierceecom/exceptionmappers/IllegalArgumentExceptionMapper.java

@@ -0,0 +1,27 @@
+package com.pierceecom.exceptionmappers;
+
+import java.lang.IllegalArgumentException;
+import java.lang.Override;
+
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.Status;
+import javax.ws.rs.ext.ExceptionMapper;
+import javax.ws.rs.ext.Provider;
+
+
+
+import com.pierceecom.model.ErrorMessage;
+
+
+@Provider
+public class IllegalArgumentExceptionMapper implements ExceptionMapper<IllegalArgumentException> {
+	@Override
+	public Response toResponse(IllegalArgumentException ex){
+
+		ErrorMessage errorMessage =new ErrorMessage("Post not found", 404, "");
+		return Response.status(Status.NOT_FOUND).entity(errorMessage).build();
+
+	}
+
+
+}

blog-web/src/main/java/com/pierceecom/exceptionmappers/NotAllowedExceptionMapper.java

@@ -0,0 +1,25 @@
+package com.pierceecom.exceptionmappers;
+
+
+import javax.ws.rs.NotAllowedException;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.Status;
+import javax.ws.rs.ext.ExceptionMapper;
+import javax.ws.rs.ext.Provider;
+
+import com.pierceecom.model.ErrorMessage;
+
+@Provider
+
+public class NotAllowedExceptionMapper implements ExceptionMapper<NotAllowedException> {
+	@Override
+		public Response toResponse(NotAllowedException ex){
+
+		ErrorMessage errorMessage =new ErrorMessage("Invalid input", 404, "#/definitions/Post");
+		return Response.status(Status.METHOD_NOT_ALLOWED).entity(errorMessage).type(MediaType.APPLICATION_JSON).build();
+
+	}
+
+}
+

blog-web/src/main/java/com/pierceecom/exceptionmappers/OptimisticLockExceptionMapper.java

@@ -0,0 +1,21 @@
+package com.pierceecom.exceptionmappers;
+
+import javax.persistence.OptimisticLockException;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.Status;
+import javax.ws.rs.ext.ExceptionMapper;
+import javax.ws.rs.ext.Provider;
+
+import com.pierceecom.model.ErrorMessage;
+
+@Provider
+public class OptimisticLockExceptionMapper implements ExceptionMapper<OptimisticLockException> {
+	@Override
+	public Response toResponse(OptimisticLockException ex){
+
+		ErrorMessage errorMessage =new ErrorMessage("Post not found", 404, "");
+		return Response.status(Status.NOT_FOUND).entity(errorMessage).build();
+
+	}
+
+}

blog-web/src/main/java/com/pierceecom/exceptions/DataNotFoundException.java

@@ -0,0 +1,14 @@
+package com.pierceecom.exceptions;
+
+public class DataNotFoundException extends RuntimeException {
+
+		private static final long serialVersionUID = 4645536692857767394L;
+
+
+public DataNotFoundException(String message){
+		super(message);
+
+}
+
+}
+

blog-web/src/main/java/com/pierceecom/model/ErrorMessage.java

@@ -0,0 +1,46 @@
+package com.pierceecom.model;
+
+import javax.xml.bind.annotation.XmlRootElement;
+
+@XmlRootElement
+public class ErrorMessage {
+	private String errorMessage;
+	private int errorCode;
+	private String documentation;
+
+	public ErrorMessage() {
+	}
+
+	public ErrorMessage(String errorMessage, int errorCode, String documentation) {
+		super();
+		this.errorMessage = errorMessage;
+		this.errorCode = errorCode;
+		this.documentation = documentation;
+	}
+
+	public String getErrorMessage() {
+		return errorMessage;
+	}
+
+	public void setErrorMessage(String errorMessage) {
+		this.errorMessage = errorMessage;
+	}
+
+	public int getErrorCode() {
+		return errorCode;
+	}
+
+	public void setErrorCode(int errorCode) {
+		this.errorCode = errorCode;
+	}
+
+	public String getDocumentation() {
+		return documentation;
+	}
+
+	public void setDocumentation(String documentation) {
+		this.documentation = documentation;
+	}
+
+}
+