#311 Cache hibernate queries from JPA repositories

Author: developster

persistence/src/main/java/org/devgateway/toolkit/persistence/application.properties

@@ -27,6 +27,7 @@ spring.jpa.hibernate.jdbc.batch_versioned_data=true
 spring.jpa.hibernate.bytecode.use_reflection_optimizer=true
 spring.jpa.hibernate.bytecode.provider=javassist
 spring.jpa.hibernate.cache.use_query_cache=true
+spring.jpa.properties.hibernate.cache.use_second_level_cache=true
 spring.servlet.multipart.enabled = false
 
 #enable modified flag for envers, to track field-level modifications

persistence/src/main/java/org/devgateway/toolkit/persistence/repository/CacheHibernateQueryResult.java

@@ -0,0 +1,19 @@
+package org.devgateway.toolkit.persistence.repository;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import javax.persistence.QueryHint;
+
+import org.springframework.data.jpa.repository.QueryHints;
+
+/**
+ * @author Octavian Ciubotaru
+ */
+@Target({ ElementType.METHOD, ElementType.ANNOTATION_TYPE })
+@Retention(RetentionPolicy.RUNTIME)
+@QueryHints({@QueryHint(name = "org.hibernate.cacheable", value = "true")})
+public @interface CacheHibernateQueryResult {
+}

persistence/src/main/java/org/devgateway/toolkit/persistence/repository/norepository/BaseJpaRepository.java

@@ -1,15 +1,63 @@
 package org.devgateway.toolkit.persistence.repository.norepository;
 
+import org.devgateway.toolkit.persistence.repository.CacheHibernateQueryResult;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.domain.Sort;
+import org.springframework.data.jpa.domain.Specification;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
 import org.springframework.data.repository.NoRepositoryBean;
+import org.springframework.lang.Nullable;
 
 import java.io.Serializable;
+import java.util.List;
+import java.util.Optional;
 
 /**
  * Created by Octavian on 01.07.2016.
  */
 @NoRepositoryBean
 public interface BaseJpaRepository<T, ID extends Serializable>
         extends JpaRepository<T, ID>, JpaSpecificationExecutor<T> {
+
+    @Override
+    @CacheHibernateQueryResult
+    List<T> findAll();
+
+    @Override
+    @CacheHibernateQueryResult
+    List<T> findAll(Sort sort);
+
+    @Override
+    @CacheHibernateQueryResult
+    List<T> findAll(Specification<T> spec);
+
+    @Override
+    @CacheHibernateQueryResult
+    Page<T> findAll(Specification<T> spec, Pageable pageable);
+
+    @Override
+    @CacheHibernateQueryResult
+    Page<T> findAll(Pageable pageable);
+
+    @Override
+    @CacheHibernateQueryResult
+    List<T> findAll(Specification<T> spec, Sort sort);
+
+    @Override
+    @CacheHibernateQueryResult
+    Optional<T> findOne(@Nullable Specification<T> spec);
+
+    @Override
+    @CacheHibernateQueryResult
+    long count(Specification<T> spec);
+
+    @Override
+    @CacheHibernateQueryResult
+    long count();
+
+    @Override
+    @CacheHibernateQueryResult
+    Optional<T> findById(ID id);
 }

persistence/src/main/resources/application.properties

@@ -0,0 +1,4 @@
+
+# Uncomment for Hibernate SQL statements and parameters
+#logging.level.org.hibernate.SQL=DEBUG
+#logging.level.org.hibernate.type.descriptor.sql.BasicBinder=TRACE

persistence/src/main/resources/ehcache.xml

@@ -50,4 +50,19 @@
            maxEntriesLocalHeap="100000"
            statistics="true">
     </cache>
+
+    <cache name="default-update-timestamps-region"
+           eternal="true"
+           diskPersistent="false"
+           maxEntriesLocalHeap="10000"
+           statistics="true">
+    </cache>
+
+    <cache name="default-query-results-region"
+           eternal="true"
+           diskPersistent="false"
+           maxEntriesLocalHeap="10000"
+           statistics="true">
+    </cache>
+
 </ehcache>

persistence/src/test/java/org/devgateway/toolkit/persistence/excel/test/TestAddressRepository.java

@@ -7,6 +7,7 @@
 import org.springframework.data.domain.Sort;
 import org.springframework.data.jpa.domain.Specification;
 
+import java.io.Serializable;
 import java.util.List;
 import java.util.Optional;
 
@@ -161,4 +162,9 @@ public long count(Example example) {
     public boolean exists(Example example) {
         return false;
     }
+
+    @Override
+    public Optional findById(Serializable serializable) {
+        return Optional.empty();
+    }
 }