[BAEL-1219] OLingo2 code

zw1127 · Apr 4, 2019 · 881580f · 881580f
1 parent bac1443
commit 881580f
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diff --git a/apache-olingo/olingo2/src/main/java/org/baeldung/examples/olingo2/CarsODataApplication.java b/apache-olingo/olingo2/src/main/java/org/baeldung/examples/olingo2/CarsODataApplication.java
diff --git a/...lingo/olingo2/src/main/java/org/baeldung/examples/olingo2/CarsODataJPAServiceFactory.java b/...lingo/olingo2/src/main/java/org/baeldung/examples/olingo2/CarsODataJPAServiceFactory.java
@@ -1,37 +1,292 @@
 package org.baeldung.examples.olingo2;
 
+import java.util.List;
+import java.util.Map;
+
+import javax.persistence.EntityGraph;
 import javax.persistence.EntityManager;
+import javax.persistence.EntityManagerFactory;
+import javax.persistence.EntityTransaction;
+import javax.persistence.FlushModeType;
+import javax.persistence.LockModeType;
+import javax.persistence.Persistence;
+import javax.persistence.Query;
+import javax.persistence.StoredProcedureQuery;
+import javax.persistence.SynchronizationType;
+import javax.persistence.TypedQuery;
+import javax.persistence.criteria.CriteriaBuilder;
+import javax.persistence.criteria.CriteriaDelete;
+import javax.persistence.criteria.CriteriaQuery;
+import javax.persistence.criteria.CriteriaUpdate;
+import javax.persistence.metamodel.Metamodel;
 
 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.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.springframework.orm.jpa.EntityManagerFactoryUtils;
+import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
 import org.springframework.stereotype.Component;
 
 /**
- * OData ServiceFactory that 
+ * ODataJPAServiceFactory implementation for our sample domain 
  * @author Philippe
  *
  */
 @Component
 public class CarsODataJPAServiceFactory extends ODataJPAServiceFactory {
 
-    private EntityManager em;
     private static final Logger log = LoggerFactory.getLogger(CarsODataJPAServiceFactory.class);
 
-    public CarsODataJPAServiceFactory(EntityManager em) {
-        this.em = em;
+    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. 
+     */
     @Override
     public ODataJPAContext initializeODataJPAContext() throws ODataJPARuntimeException {
 
-        ODataJPAContext oDataJPAContext = getODataJPAContext();
-        oDataJPAContext.setEntityManagerFactory(em.getEntityManagerFactory());
-        oDataJPAContext.setPersistenceUnitName("default");
+        log.info("[I32] >>> initializeODataJPAContext()");
+        ODataJPAContext ctx = getODataJPAContext();
+
+        // Here we're passing the EM that was created by the EntityManagerFilter (see JerseyConfig)
+        ctx.setEntityManager(new EntityManagerWrapper(EntityManagerHolder.getCurrentEntityManager()));
+        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);
+
+
+        return ctx;
+
+    }
+
+    static class EntityManagerWrapper implements EntityManager {
 
-        return oDataJPAContext;
+        private EntityManager delegate;
+
+        public void persist(Object entity) {
+            log.info("[I68] persist: entity.class=" + entity.getClass().getSimpleName());
+            delegate.persist(entity);
+            //delegate.flush();
+        }
+
+        public <T> T merge(T entity) {
+            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());
+            delegate.remove(entity);
+        }
+
+        public <T> T find(Class<T> entityClass, Object primaryKey) {
+            return delegate.find(entityClass, primaryKey);
+        }
+
+        public <T> T find(Class<T> entityClass, Object primaryKey, Map<String, Object> properties) {
+            return delegate.find(entityClass, primaryKey, properties);
+        }
+
+        public <T> T find(Class<T> entityClass, Object primaryKey, LockModeType lockMode) {
+            return delegate.find(entityClass, primaryKey, lockMode);
+        }
+
+        public <T> T find(Class<T> entityClass, Object primaryKey, LockModeType lockMode, Map<String, Object> properties) {
+            return delegate.find(entityClass, primaryKey, lockMode, properties);
+        }
+
+        public <T> T getReference(Class<T> entityClass, Object primaryKey) {
+            return delegate.getReference(entityClass, primaryKey);
+        }
+
+        public void flush() {
+            delegate.flush();
+        }
+
+        public void setFlushMode(FlushModeType flushMode) {
+            delegate.setFlushMode(flushMode);
+        }
+
+        public FlushModeType getFlushMode() {
+            return delegate.getFlushMode();
+        }
+
+        public void lock(Object entity, LockModeType lockMode) {
+            delegate.lock(entity, lockMode);
+        }
+
+        public void lock(Object entity, LockModeType lockMode, Map<String, Object> properties) {
+            delegate.lock(entity, lockMode, properties);
+        }
+
+        public void refresh(Object entity) {
+            delegate.refresh(entity);
+        }
+
+        public void refresh(Object entity, Map<String, Object> properties) {
+            delegate.refresh(entity, properties);
+        }
+
+        public void refresh(Object entity, LockModeType lockMode) {
+            delegate.refresh(entity, lockMode);
+        }
+
+        public void refresh(Object entity, LockModeType lockMode, Map<String, Object> properties) {
+            delegate.refresh(entity, lockMode, properties);
+        }
+
+        public void clear() {
+            delegate.clear();
+        }
+
+        public void detach(Object entity) {
+            delegate.detach(entity);
+        }
+
+        public boolean contains(Object entity) {
+            return delegate.contains(entity);
+        }
+
+        public LockModeType getLockMode(Object entity) {
+            return delegate.getLockMode(entity);
+        }
+
+        public void setProperty(String propertyName, Object value) {
+            delegate.setProperty(propertyName, value);
+        }
+
+        public Map<String, Object> getProperties() {
+            return delegate.getProperties();
+        }
+
+        public Query createQuery(String qlString) {
+            return delegate.createQuery(qlString);
+        }
+
+        public <T> TypedQuery<T> createQuery(CriteriaQuery<T> criteriaQuery) {
+            return delegate.createQuery(criteriaQuery);
+        }
+
+        public Query createQuery(CriteriaUpdate updateQuery) {
+            return delegate.createQuery(updateQuery);
+        }
+
+        public Query createQuery(CriteriaDelete deleteQuery) {
+            return delegate.createQuery(deleteQuery);
+        }
+
+        public <T> TypedQuery<T> createQuery(String qlString, Class<T> resultClass) {
+            return delegate.createQuery(qlString, resultClass);
+        }
+
+        public Query createNamedQuery(String name) {
+            return delegate.createNamedQuery(name);
+        }
+
+        public <T> TypedQuery<T> createNamedQuery(String name, Class<T> resultClass) {
+            return delegate.createNamedQuery(name, resultClass);
+        }
+
+        public Query createNativeQuery(String sqlString) {
+            return delegate.createNativeQuery(sqlString);
+        }
+
+        public Query createNativeQuery(String sqlString, Class resultClass) {
+            return delegate.createNativeQuery(sqlString, resultClass);
+        }
+
+        public Query createNativeQuery(String sqlString, String resultSetMapping) {
+            return delegate.createNativeQuery(sqlString, resultSetMapping);
+        }
+
+        public StoredProcedureQuery createNamedStoredProcedureQuery(String name) {
+            return delegate.createNamedStoredProcedureQuery(name);
+        }
+
+        public StoredProcedureQuery createStoredProcedureQuery(String procedureName) {
+            return delegate.createStoredProcedureQuery(procedureName);
+        }
+
+        public StoredProcedureQuery createStoredProcedureQuery(String procedureName, Class... resultClasses) {
+            return delegate.createStoredProcedureQuery(procedureName, resultClasses);
+        }
+
+        public StoredProcedureQuery createStoredProcedureQuery(String procedureName, String... resultSetMappings) {
+            return delegate.createStoredProcedureQuery(procedureName, resultSetMappings);
+        }
+
+        public void joinTransaction() {
+            delegate.joinTransaction();
+        }
+
+        public boolean isJoinedToTransaction() {
+            return delegate.isJoinedToTransaction();
+        }
+
+        public <T> T unwrap(Class<T> cls) {
+            return delegate.unwrap(cls);
+        }
+
+        public Object getDelegate() {
+            return delegate.getDelegate();
+        }
+
+        public void close() {
+            log.info("[I229] close");
+            delegate.close();
+        }
+
+        public boolean isOpen() {
+            boolean isOpen = delegate.isOpen();
+            log.info("[I236] isOpen: " + isOpen);
+            return isOpen;
+        }
+
+        public EntityTransaction getTransaction() {
+            log.info("[I240] getTransaction()");
+            return delegate.getTransaction();
+        }
+
+        public EntityManagerFactory getEntityManagerFactory() {
+            return delegate.getEntityManagerFactory();
+        }
+
+        public CriteriaBuilder getCriteriaBuilder() {
+            return delegate.getCriteriaBuilder();
+        }
+
+        public Metamodel getMetamodel() {
+            return delegate.getMetamodel();
+        }
+
+        public <T> EntityGraph<T> createEntityGraph(Class<T> rootType) {
+            return delegate.createEntityGraph(rootType);
+        }
+
+        public EntityGraph<?> createEntityGraph(String graphName) {
+            return delegate.createEntityGraph(graphName);
+        }
+
+        public EntityGraph<?> getEntityGraph(String graphName) {
+            return delegate.getEntityGraph(graphName);
+        }
+
+        public <T> List<EntityGraph<? super T>> getEntityGraphs(Class<T> entityClass) {
+            return delegate.getEntityGraphs(entityClass);
+        }
+
+        public EntityManagerWrapper(EntityManager delegate) {
+            this.delegate = delegate;
+        }
 
     }
 

diff --git a/apache-olingo/olingo2/src/main/java/org/baeldung/examples/olingo2/EntityManagerHolder.java b/apache-olingo/olingo2/src/main/java/org/baeldung/examples/olingo2/EntityManagerHolder.java
@@ -0,0 +1,18 @@
+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();
+    }
+
+}