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Initial import

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This commit is contained in:
Philippe
2019-04-08 10:23:31 -03:00
parent 881580f2fe
commit 6ac9c01d3d
25 changed files with 991 additions and 53 deletions
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39
apache-olingo/olingo2/src/main/java/org/baeldung/examples/olingo2/CarsODataJPAServiceFactory.java
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@@ -19,10 +19,13 @@ import javax.persistence.criteria.CriteriaDelete;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.CriteriaUpdate;
import javax.persistence.metamodel.Metamodel;
import javax.servlet.http.HttpServletRequest;
import org.apache.olingo.odata2.api.processor.ODataContext;
import org.apache.olingo.odata2.jpa.processor.api.ODataJPAContext;
import org.apache.olingo.odata2.jpa.processor.api.ODataJPAServiceFactory;
import org.apache.olingo.odata2.jpa.processor.api.exception.ODataJPARuntimeException;
import org.baeldung.examples.olingo2.JerseyConfig.EntityManagerFilter;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.orm.jpa.EntityManagerFactoryUtils;
@@ -36,15 +39,14 @@ import org.springframework.stereotype.Component;
*/
@Component
public class CarsODataJPAServiceFactory extends ODataJPAServiceFactory {
private static final Logger log = LoggerFactory.getLogger(CarsODataJPAServiceFactory.class);
public CarsODataJPAServiceFactory() {
// Enable detailed error messages (useful for debugging)
setDetailErrors(true);
}
/**
* This method will be called by Olingo on every request to
* initialize the ODataJPAContext that will be used.
@@ -54,37 +56,40 @@ public class CarsODataJPAServiceFactory extends ODataJPAServiceFactory {
log.info("[I32] >>> initializeODataJPAContext()");
ODataJPAContext ctx = getODataJPAContext();
ODataContext octx = ctx.getODataContext();
HttpServletRequest request = (HttpServletRequest)octx.getParameter(ODataContext.HTTP_SERVLET_REQUEST_OBJECT);
EntityManager em = (EntityManager)request.getAttribute(EntityManagerFilter.EM_REQUEST_ATTRIBUTE);
// Here we're passing the EM that was created by the EntityManagerFilter (see JerseyConfig)
ctx.setEntityManager(new EntityManagerWrapper(EntityManagerHolder.getCurrentEntityManager()));
ctx.setEntityManager(new EntityManagerWrapper(em));
ctx.setPersistenceUnitName("default");
// We're managing the EM's lifecycle, so we must inform Olingo that it should not
// try to manage transactions and/or persistence sessions
ctx.setContainerManaged(true);
ctx.setContainerManaged(true);
return ctx;
}
static class EntityManagerWrapper implements EntityManager {
private EntityManager delegate;
public void persist(Object entity) {
log.info("[I68] persist: entity.class=" + entity.getClass().getSimpleName());
log.info("[I68] persist: entity.class=" + entity.getClass()
.getSimpleName());
delegate.persist(entity);
//delegate.flush();
// delegate.flush();
}
public <T> T merge(T entity) {
log.info("[I74] merge: entity.class=" + entity.getClass().getSimpleName());
log.info("[I74] merge: entity.class=" + entity.getClass()
.getSimpleName());
return delegate.merge(entity);
}
public void remove(Object entity) {
log.info("[I78] remove: entity.class=" + entity.getClass().getSimpleName());
log.info("[I78] remove: entity.class=" + entity.getClass()
.getSimpleName());
delegate.remove(entity);
}
@@ -287,7 +292,7 @@ public class CarsODataJPAServiceFactory extends ODataJPAServiceFactory {
public EntityManagerWrapper(EntityManager delegate) {
this.delegate = delegate;
}
}
}

18
apache-olingo/olingo2/src/main/java/org/baeldung/examples/olingo2/EntityManagerHolder.java
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@@ -1,18 +0,0 @@
package org.baeldung.examples.olingo2;
import javax.persistence.EntityManager;
public class EntityManagerHolder {
private static ThreadLocal<EntityManager> currentEntityManager = new ThreadLocal<>();
public static void setCurrentEntityManager(EntityManager em) {
currentEntityManager.set(em);
}
public static EntityManager getCurrentEntityManager() {
return currentEntityManager.get();
}
}

40
apache-olingo/olingo2/src/main/java/org/baeldung/examples/olingo2/JerseyConfig.java
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@@ -1,4 +1,4 @@
package org.baeldung.examples.olingo2;
package org.baeldung.examples.olingo2;
import java.io.IOException;
@@ -6,12 +6,14 @@ import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.Path;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerRequestFilter;
import javax.ws.rs.container.ContainerResponseContext;
import javax.ws.rs.container.ContainerResponseFilter;
import javax.ws.rs.core.Context;
import javax.ws.rs.ext.Provider;
import org.apache.olingo.odata2.api.ODataServiceFactory;
@@ -57,11 +59,15 @@ public class JerseyConfig extends ResourceConfig {
*/
@Provider
public static class EntityManagerFilter implements ContainerRequestFilter, ContainerResponseFilter {
private static final Logger log = LoggerFactory.getLogger(EntityManagerFilter.class);
public static final String EM_REQUEST_ATTRIBUTE = EntityManagerFilter.class.getName() + "_ENTITY_MANAGER";
private final EntityManagerFactory emf;
@Context
private HttpServletRequest httpRequest;
public EntityManagerFilter(EntityManagerFactory emf) {
this.emf = emf;
}
@@ -70,11 +76,12 @@ public class JerseyConfig extends ResourceConfig {
public void filter(ContainerRequestContext ctx) throws IOException {
log.info("[I60] >>> filter");
EntityManager em = this.emf.createEntityManager();
EntityManagerHolder.setCurrentEntityManager(em);
httpRequest.setAttribute(EM_REQUEST_ATTRIBUTE, em);
// Start a new transaction unless we have a simple GET
if ( !"GET".equalsIgnoreCase(ctx.getMethod())) {
em.getTransaction().begin();
if (!"GET".equalsIgnoreCase(ctx.getMethod())) {
em.getTransaction()
.begin();
}
}
@@ -82,24 +89,23 @@ public class JerseyConfig extends ResourceConfig {
public void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext) throws IOException {
log.info("[I68] <<< filter");
EntityManager em = (EntityManager) httpRequest.getAttribute(EM_REQUEST_ATTRIBUTE);
EntityManager em = EntityManagerHolder.getCurrentEntityManager();
if ( em != null && !"GET".equalsIgnoreCase(requestContext.getMethod())) {
if (!"GET".equalsIgnoreCase(requestContext.getMethod())) {
EntityTransaction t = em.getTransaction();
if ( t.isActive()) {
if ( !t.getRollbackOnly()) {
if (t.isActive()) {
if (!t.getRollbackOnly()) {
t.commit();
}
}
}
em.close();
}
}
@Path("/")
public static class CarsRootLocator extends ODataRootLocator {
@@ -113,7 +119,7 @@ public class JerseyConfig extends ResourceConfig {
public ODataServiceFactory getServiceFactory() {
return this.serviceFactory;
}
}
}

4
apache-olingo/olingo2/src/main/resources/application.yml
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@@ -1,4 +1,6 @@
server:
port: 8180
spring:
jersey:
application-path: /odata