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authoremaclee <lee.anjella.macabuhay@est.tech>2022-03-23 11:02:03 +0000
committerLee Anjella Macabuhay <lee.anjella.macabuhay@est.tech>2022-03-25 16:13:01 +0000
commitc9275522f95f6cd94f28286f5e86f86dd451a19b (patch)
tree58c970ae97fc5d9b9baa935696aeb7ee165644ca
parent81f91b6558e9f385c646005c653937ffe819ad0d (diff)
Add Start and Stop sessions on JAVA API
Issue-ID: CPS-899 Signed-off-by: emaclee <lee.anjella.macabuhay@est.tech> Change-Id: Idbeb922790824b1ca601d6d4798df45efa57d685
-rw-r--r--cps-ri/src/main/java/org/onap/cps/spi/impl/CpsDataPersistenceServiceImpl.java13
-rw-r--r--cps-ri/src/main/java/org/onap/cps/spi/utils/SessionManager.java86
-rw-r--r--cps-ri/src/main/resources/hibernate.cfg.xml16
-rw-r--r--cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsDataPersistenceServiceSpec.groovy104
-rw-r--r--cps-ri/src/test/groovy/org/onap/cps/spi/utils/SessionManagerIntegrationSpec.groovy56
-rw-r--r--cps-ri/src/test/resources/hibernate.cfg.xml16
-rw-r--r--cps-service/src/main/java/org/onap/cps/api/CpsDataService.java15
-rwxr-xr-xcps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java11
-rw-r--r--cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java13
-rw-r--r--cps-service/src/test/groovy/org/onap/cps/api/impl/CpsDataServiceImplSpec.groovy16
10 files changed, 302 insertions, 44 deletions
diff --git a/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsDataPersistenceServiceImpl.java b/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsDataPersistenceServiceImpl.java
index 78862d7233..bb3c2d07d4 100644
--- a/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsDataPersistenceServiceImpl.java
+++ b/cps-ri/src/main/java/org/onap/cps/spi/impl/CpsDataPersistenceServiceImpl.java
@@ -56,6 +56,7 @@ import org.onap.cps.spi.model.DataNodeBuilder;
import org.onap.cps.spi.repository.AnchorRepository;
import org.onap.cps.spi.repository.DataspaceRepository;
import org.onap.cps.spi.repository.FragmentRepository;
+import org.onap.cps.spi.utils.SessionManager;
import org.onap.cps.utils.JsonObjectMapper;
import org.springframework.dao.DataIntegrityViolationException;
import org.springframework.stereotype.Service;
@@ -73,6 +74,8 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
private final JsonObjectMapper jsonObjectMapper;
+ private final SessionManager sessionManager;
+
private static final String REG_EX_FOR_OPTIONAL_LIST_INDEX = "(\\[@[\\s\\S]+?]){0,1})";
private static final Pattern REG_EX_PATTERN_FOR_LIST_ELEMENT_KEY_PREDICATE =
Pattern.compile("\\[(\\@([^\\/]{0,9999}))\\]$");
@@ -199,6 +202,16 @@ public class CpsDataPersistenceServiceImpl implements CpsDataPersistenceService
.collect(Collectors.toUnmodifiableList());
}
+ @Override
+ public String startSession() {
+ return sessionManager.startSession();
+ }
+
+ @Override
+ public void closeSession(final String sessionId) {
+ sessionManager.closeSession(sessionId);
+ }
+
private static Set<String> processAncestorXpath(final List<FragmentEntity> fragmentEntities,
final CpsPathQuery cpsPathQuery) {
final Set<String> ancestorXpath = new HashSet<>();
diff --git a/cps-ri/src/main/java/org/onap/cps/spi/utils/SessionManager.java b/cps-ri/src/main/java/org/onap/cps/spi/utils/SessionManager.java
new file mode 100644
index 0000000000..eb535ecc37
--- /dev/null
+++ b/cps-ri/src/main/java/org/onap/cps/spi/utils/SessionManager.java
@@ -0,0 +1,86 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2021-2022 Nordix Foundation
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.spi.utils;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+import org.hibernate.HibernateException;
+import org.hibernate.Session;
+import org.hibernate.SessionException;
+import org.hibernate.SessionFactory;
+import org.hibernate.cfg.Configuration;
+import org.onap.cps.spi.entities.AnchorEntity;
+import org.onap.cps.spi.entities.DataspaceEntity;
+import org.onap.cps.spi.entities.SchemaSetEntity;
+import org.onap.cps.spi.entities.YangResourceEntity;
+import org.springframework.stereotype.Component;
+
+@Component
+public class SessionManager {
+
+ private static SessionFactory sessionFactory;
+ private static Map<String, Session> sessionMap = new HashMap<>();
+
+ private synchronized void buildSessionFactory() {
+ if (sessionFactory == null) {
+ sessionFactory = new Configuration().configure("hibernate.cfg.xml")
+ .addAnnotatedClass(AnchorEntity.class)
+ .addAnnotatedClass(DataspaceEntity.class)
+ .addAnnotatedClass(SchemaSetEntity.class)
+ .addAnnotatedClass(YangResourceEntity.class)
+ .buildSessionFactory();
+ }
+ }
+
+ /**
+ * Starts a session which allows use of locks and batch interaction with the persistence service.
+ *
+ * @return Session ID string
+ */
+ public String startSession() {
+ buildSessionFactory();
+ final Session session = sessionFactory.openSession();
+ final String sessionId = UUID.randomUUID().toString();
+ sessionMap.put(sessionId, session);
+ session.beginTransaction();
+ return sessionId;
+ }
+
+ /**
+ * Close session.
+ *
+ * @param sessionId session ID
+ */
+ public void closeSession(final String sessionId) {
+ try {
+ final Session currentSession = sessionMap.get(sessionId);
+ currentSession.getTransaction().commit();
+ currentSession.close();
+ } catch (final NullPointerException e) {
+ throw new SessionException(String.format("Session with session ID %s does not exist", sessionId));
+ } catch (final HibernateException e) {
+ throw new SessionException(String.format("Unable to close session with session ID %s", sessionId));
+ }
+ sessionMap.remove(sessionId);
+ }
+
+} \ No newline at end of file
diff --git a/cps-ri/src/main/resources/hibernate.cfg.xml b/cps-ri/src/main/resources/hibernate.cfg.xml
new file mode 100644
index 0000000000..98e6cfc5b7
--- /dev/null
+++ b/cps-ri/src/main/resources/hibernate.cfg.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE hibernate-configuration PUBLIC
+ "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
+ "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
+
+<hibernate-configuration>
+ <session-factory>
+ <property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
+ <property name="hibernate.connection.url">jdbc:postgresql://${DB_HOST}:${DB_PORT:5432}/cpsdb</property>
+ <property name="hibernate.connection.username">${DB_USERNAME}</property>
+ <property name="hibernate.connection.password">${DB_PASSWORD}</property>
+ <property name="hibernate.dialect">org.hibernate.dialect.PostgreSQL82Dialect</property>
+ <property name="show_sql">true</property>
+ <property name="hibernate.hbm2ddl.auto">update</property>
+ </session-factory>
+</hibernate-configuration> \ No newline at end of file
diff --git a/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsDataPersistenceServiceSpec.groovy b/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsDataPersistenceServiceSpec.groovy
index 7166008ad3..c508762054 100644
--- a/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsDataPersistenceServiceSpec.groovy
+++ b/cps-ri/src/test/groovy/org/onap/cps/spi/impl/CpsDataPersistenceServiceSpec.groovy
@@ -28,19 +28,20 @@ import org.onap.cps.spi.model.DataNodeBuilder
import org.onap.cps.spi.repository.AnchorRepository
import org.onap.cps.spi.repository.DataspaceRepository
import org.onap.cps.spi.repository.FragmentRepository
+import org.onap.cps.spi.utils.SessionManager
import org.onap.cps.utils.JsonObjectMapper
import spock.lang.Specification
-
class CpsDataPersistenceServiceSpec extends Specification {
def mockDataspaceRepository = Mock(DataspaceRepository)
def mockAnchorRepository = Mock(AnchorRepository)
def mockFragmentRepository = Mock(FragmentRepository)
def jsonObjectMapper = new JsonObjectMapper(new ObjectMapper())
+ def mockSessionManager = Mock(SessionManager)
def objectUnderTest = new CpsDataPersistenceServiceImpl(
- mockDataspaceRepository, mockAnchorRepository, mockFragmentRepository, jsonObjectMapper)
+ mockDataspaceRepository, mockAnchorRepository, mockFragmentRepository, jsonObjectMapper,mockSessionManager)
def 'Handling of StaleStateException (caused by concurrent updates) during data node tree update.'() {
@@ -49,67 +50,82 @@ class CpsDataPersistenceServiceSpec extends Specification {
def myAnchorName = 'my-anchor'
given: 'data node object'
- def submittedDataNode = new DataNodeBuilder()
- .withXpath(parentXpath)
- .withLeaves(['leaf-name': 'leaf-value'])
- .build()
+ def submittedDataNode = new DataNodeBuilder()
+ .withXpath(parentXpath)
+ .withLeaves(['leaf-name': 'leaf-value'])
+ .build()
and: 'fragment to be updated'
- mockFragmentRepository.getByDataspaceAndAnchorAndXpath(_, _, _) >> {
- def fragmentEntity = new FragmentEntity()
- fragmentEntity.setXpath(parentXpath)
- fragmentEntity.setChildFragments(Collections.emptySet())
- return fragmentEntity
- }
+ mockFragmentRepository.getByDataspaceAndAnchorAndXpath(_, _, _) >> {
+ def fragmentEntity = new FragmentEntity()
+ fragmentEntity.setXpath(parentXpath)
+ fragmentEntity.setChildFragments(Collections.emptySet())
+ return fragmentEntity
+ }
and: 'data node is concurrently updated by another transaction'
- mockFragmentRepository.save(_) >> { throw new StaleStateException("concurrent updates") }
+ mockFragmentRepository.save(_) >> { throw new StaleStateException("concurrent updates") }
when: 'attempt to update data node'
- objectUnderTest.replaceDataNodeTree(myDataspaceName, myAnchorName, submittedDataNode)
+ objectUnderTest.replaceDataNodeTree(myDataspaceName, myAnchorName, submittedDataNode)
then: 'concurrency exception is thrown'
- def concurrencyException = thrown(ConcurrencyException)
- assert concurrencyException.getDetails().contains(myDataspaceName)
- assert concurrencyException.getDetails().contains(myAnchorName)
- assert concurrencyException.getDetails().contains(parentXpath)
+ def concurrencyException = thrown(ConcurrencyException)
+ assert concurrencyException.getDetails().contains(myDataspaceName)
+ assert concurrencyException.getDetails().contains(myAnchorName)
+ assert concurrencyException.getDetails().contains(parentXpath)
}
def 'Retrieving a data node with a property JSON value of #scenario'() {
given: 'a fragment with a property JSON value of #scenario'
- mockFragmentRepository.getByDataspaceAndAnchorAndXpath(_, _, _) >> {
- new FragmentEntity(childFragments: Collections.emptySet(),
- attributes: "{\"some attribute\": ${dataString}}")
- }
+ mockFragmentRepository.getByDataspaceAndAnchorAndXpath(_, _, _) >> {
+ new FragmentEntity(childFragments: Collections.emptySet(),
+ attributes: "{\"some attribute\": ${dataString}}")
+ }
when: 'getting the data node represented by this fragment'
- def dataNode = objectUnderTest.getDataNode('my-dataspace', 'my-anchor',
- 'parent-01', FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS)
+ def dataNode = objectUnderTest.getDataNode('my-dataspace', 'my-anchor',
+ 'parent-01', FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS)
then: 'the leaf is of the correct value and data type'
- def attributeValue = dataNode.leaves.get('some attribute')
- assert attributeValue == expectedValue
- assert attributeValue.class == expectedDataClass
+ def attributeValue = dataNode.leaves.get('some attribute')
+ assert attributeValue == expectedValue
+ assert attributeValue.class == expectedDataClass
where: 'the following Data Type is passed'
- scenario | dataString || expectedValue | expectedDataClass
- 'just numbers' | '15174' || 15174 | Integer
- 'number with dot' | '15174.32' || 15174.32 | Double
- 'number with 0 value after dot' | '15174.0' || 15174.0 | Double
- 'number with 0 value before dot' | '0.32' || 0.32 | Double
- 'number higher than max int' | '2147483648' || 2147483648 | Long
- 'just text' | '"Test"' || 'Test' | String
- 'number with exponent' | '1.2345e5' || 1.2345e5 | Double
- 'number higher than max int with dot' | '123456789101112.0' || 123456789101112.0 | Double
- 'text and numbers' | '"String = \'1234\'"' || "String = '1234'" | String
- 'number as String' | '"12345"' || '12345' | String
+ scenario | dataString || expectedValue | expectedDataClass
+ 'just numbers' | '15174' || 15174 | Integer
+ 'number with dot' | '15174.32' || 15174.32 | Double
+ 'number with 0 value after dot' | '15174.0' || 15174.0 | Double
+ 'number with 0 value before dot' | '0.32' || 0.32 | Double
+ 'number higher than max int' | '2147483648' || 2147483648 | Long
+ 'just text' | '"Test"' || 'Test' | String
+ 'number with exponent' | '1.2345e5' || 1.2345e5 | Double
+ 'number higher than max int with dot' | '123456789101112.0' || 123456789101112.0 | Double
+ 'text and numbers' | '"String = \'1234\'"' || "String = '1234'" | String
+ 'number as String' | '"12345"' || '12345' | String
}
def 'Retrieving a data node with invalid JSON'() {
given: 'a fragment with invalid JSON'
- mockFragmentRepository.getByDataspaceAndAnchorAndXpath(_, _, _) >> {
- new FragmentEntity(childFragments: Collections.emptySet(), attributes: '{invalid json')
- }
+ mockFragmentRepository.getByDataspaceAndAnchorAndXpath(_, _, _) >> {
+ new FragmentEntity(childFragments: Collections.emptySet(), attributes: '{invalid json')
+ }
when: 'getting the data node represented by this fragment'
- def dataNode = objectUnderTest.getDataNode('my-dataspace', 'my-anchor',
+ def dataNode = objectUnderTest.getDataNode('my-dataspace', 'my-anchor',
'parent-01', FetchDescendantsOption.INCLUDE_ALL_DESCENDANTS)
then: 'a data validation exception is thrown'
- thrown(DataValidationException)
+ thrown(DataValidationException)
}
-}
+ def 'start session'() {
+ when: 'start session'
+ objectUnderTest.startSession()
+ then: 'the session manager method to start session is invoked'
+ 1 * mockSessionManager.startSession()
+ }
+
+ def 'close session'() {
+ given: 'session ID'
+ def someSessionId = 'someSessionId'
+ when: 'close session method is called with session ID as parameter'
+ objectUnderTest.closeSession(someSessionId)
+ then: 'the session manager method to close session is invoked with parameter'
+ 1 * mockSessionManager.closeSession(someSessionId)
+ }
+} \ No newline at end of file
diff --git a/cps-ri/src/test/groovy/org/onap/cps/spi/utils/SessionManagerIntegrationSpec.groovy b/cps-ri/src/test/groovy/org/onap/cps/spi/utils/SessionManagerIntegrationSpec.groovy
new file mode 100644
index 0000000000..c46092f075
--- /dev/null
+++ b/cps-ri/src/test/groovy/org/onap/cps/spi/utils/SessionManagerIntegrationSpec.groovy
@@ -0,0 +1,56 @@
+/*
+ * ============LICENSE_START=======================================================
+ * Copyright (C) 2021-2022 Nordix Foundation
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.cps.spi.utils
+
+import org.hibernate.SessionException
+import org.onap.cps.spi.impl.CpsPersistenceSpecBase
+
+class SessionManagerIntegrationSpec extends CpsPersistenceSpecBase{
+
+ def objectUnderTest = new SessionManager();
+
+ def 'start session'() {
+ when: 'start session'
+ def result = objectUnderTest.startSession()
+ then: 'session ID is returned'
+ assert result instanceof String
+ objectUnderTest.closeSession(result)
+ }
+
+ def 'close session'(){
+ given: 'session Id from calling the start session method'
+ def sessionId = objectUnderTest.startSession()
+ when: 'close session method is called'
+ objectUnderTest.closeSession(sessionId)
+ then: 'no exception is thrown'
+ noExceptionThrown()
+ }
+
+ def 'close session that does not exist' (){
+ given: 'session Id that does not exist'
+ def unknownSessionId = 'unknown session id'
+ when: 'close session method is called'
+ objectUnderTest.closeSession(unknownSessionId)
+ then: 'a session exception is thrown'
+ def thrown = thrown(SessionException)
+ assert thrown.message.contains(unknownSessionId)
+ }
+}
diff --git a/cps-ri/src/test/resources/hibernate.cfg.xml b/cps-ri/src/test/resources/hibernate.cfg.xml
new file mode 100644
index 0000000000..fae9275ddc
--- /dev/null
+++ b/cps-ri/src/test/resources/hibernate.cfg.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE hibernate-configuration PUBLIC
+ "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
+ "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
+
+<hibernate-configuration>
+ <session-factory>
+ <property name="hibernate.connection.driver_class">org.postgresql.Driver</property>
+ <property name="hibernate.connection.url">${DB_URL}</property>
+ <property name="hibernate.connection.username">${DB_USERNAME}</property>
+ <property name="hibernate.connection.password">${DB_PASSWORD}</property>
+ <property name="hibernate.dialect">org.hibernate.dialect.PostgreSQL82Dialect</property>
+ <property name="show_sql">true</property>
+ <property name="hibernate.hbm2ddl.auto">none</property>
+ </session-factory>
+</hibernate-configuration> \ No newline at end of file
diff --git a/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java b/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java
index cdd417bd8d..35caf95153 100644
--- a/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java
+++ b/cps-service/src/main/java/org/onap/cps/api/CpsDataService.java
@@ -174,4 +174,19 @@ public interface CpsDataService {
*/
void updateNodeLeavesAndExistingDescendantLeaves(String dataspaceName, String anchorName, String parentNodeXpath,
String dataNodeUpdatesAsJson, OffsetDateTime observedTimestamp);
+
+ /**
+ * Starts a session which allows use of locks and batch interaction with the persistence service.
+ *
+ * @return Session ID string
+ */
+ String startSession();
+
+ /**
+ * Close session.
+ *
+ * @param sessionId session ID
+ *
+ */
+ void closeSession(String sessionId);
}
diff --git a/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java b/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java
index aae355d507..643614f4fb 100755
--- a/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java
+++ b/cps-service/src/main/java/org/onap/cps/api/impl/CpsDataServiceImpl.java
@@ -109,6 +109,17 @@ public class CpsDataServiceImpl implements CpsDataService {
}
@Override
+ public String startSession() {
+ final String sessionId = cpsDataPersistenceService.startSession();
+ return sessionId;
+ }
+
+ @Override
+ public void closeSession(final String sessionId) {
+ cpsDataPersistenceService.closeSession(sessionId);
+ }
+
+ @Override
public void replaceNodeTree(final String dataspaceName, final String anchorName, final String parentNodeXpath,
final String jsonData, final OffsetDateTime observedTimestamp) {
final var dataNode = buildDataNode(dataspaceName, anchorName, parentNodeXpath, jsonData);
diff --git a/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java b/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java
index fd658861c2..fdcf15bee6 100644
--- a/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java
+++ b/cps-service/src/main/java/org/onap/cps/spi/CpsDataPersistenceService.java
@@ -148,4 +148,17 @@ public interface CpsDataPersistenceService {
Collection<DataNode> queryDataNodes(String dataspaceName, String anchorName,
String cpsPath, FetchDescendantsOption fetchDescendantsOption);
+ /**
+ * Starts a session which allows use of locks and batch interaction with the persistence service.
+ *
+ * @return Session ID string
+ */
+ String startSession();
+
+ /**
+ * Close session.
+ *
+ * @param sessionId session ID
+ */
+ void closeSession(String sessionId);
}
diff --git a/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsDataServiceImplSpec.groovy b/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsDataServiceImplSpec.groovy
index 785788be90..eb06199d1b 100644
--- a/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsDataServiceImplSpec.groovy
+++ b/cps-service/src/test/groovy/org/onap/cps/api/impl/CpsDataServiceImplSpec.groovy
@@ -254,4 +254,20 @@ class CpsDataServiceImplSpec extends Specification {
def schemaContext = YangTextSchemaSourceSetBuilder.of(yangResourceNameToContent).getSchemaContext()
mockYangTextSchemaSourceSet.getSchemaContext() >> schemaContext
}
+
+ def 'start session'() {
+ when: 'start session method is called'
+ objectUnderTest.startSession()
+ then: 'the persistence service method to start session is invoked'
+ 1 * mockCpsDataPersistenceService.startSession()
+ }
+
+ def 'close session'(){
+ given: 'session Id from calling the start session method'
+ def sessionId = objectUnderTest.startSession()
+ when: 'close session method is called'
+ objectUnderTest.closeSession(sessionId)
+ then: 'the persistence service method to close session is invoked'
+ 1 * mockCpsDataPersistenceService.closeSession(sessionId)
+ }
}