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-rw-r--r--feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsPersistenceProperties.java24
-rw-r--r--feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsSession.java25
-rw-r--r--feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsSessionConnector.java29
-rw-r--r--feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsSessionEntity.java204
-rw-r--r--feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/EntityMgrTrans.java198
-rw-r--r--feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/JpaDroolsSessionConnector.java127
-rw-r--r--feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/PersistenceFeature.java1857
7 files changed, 1189 insertions, 1275 deletions
diff --git a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsPersistenceProperties.java b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsPersistenceProperties.java
index c3f00359..4700e8ae 100644
--- a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsPersistenceProperties.java
+++ b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsPersistenceProperties.java
@@ -21,17 +21,17 @@
package org.onap.policy.drools.persistence;
public class DroolsPersistenceProperties {
- /*
- * feature-session-persistence.properties parameter key values
- */
- public static final String DB_DRIVER = "javax.persistence.jdbc.driver";
- public static final String DB_URL = "javax.persistence.jdbc.url";
- public static final String DB_USER = "javax.persistence.jdbc.user";
- public static final String DB_PWD = "javax.persistence.jdbc.password";
- public static final String DB_SESSIONINFO_TIMEOUT = "persistence.sessioninfo.timeout";
- public static final String JTA_OBJECTSTORE_DIR = "persistence.objectstore.dir";
+ /*
+ * feature-session-persistence.properties parameter key values
+ */
+ public static final String DB_DRIVER = "javax.persistence.jdbc.driver";
+ public static final String DB_URL = "javax.persistence.jdbc.url";
+ public static final String DB_USER = "javax.persistence.jdbc.user";
+ public static final String DB_PWD = "javax.persistence.jdbc.password";
+ public static final String DB_SESSIONINFO_TIMEOUT = "persistence.sessioninfo.timeout";
+ public static final String JTA_OBJECTSTORE_DIR = "persistence.objectstore.dir";
- private DroolsPersistenceProperties() {
- super();
- }
+ private DroolsPersistenceProperties() {
+ super();
+ }
}
diff --git a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsSession.java b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsSession.java
index a012f3c2..e8b50817 100644
--- a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsSession.java
+++ b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsSession.java
@@ -2,7 +2,7 @@
* ============LICENSE_START=======================================================
* feature-session-persistence
* ================================================================================
- * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -24,12 +24,19 @@ import java.util.Date;
public interface DroolsSession {
- public String getSessionName();
- public void setSessionName(String sessionName);
- public long getSessionId();
- public void setSessionId(long sessionId);
- public Date getCreatedDate();
- public void setCreatedDate(Date createdDate);
- public Date getUpdatedDate();
- public void setUpdatedDate(Date updatedDate);
+ public String getSessionName();
+
+ public void setSessionName(String sessionName);
+
+ public long getSessionId();
+
+ public void setSessionId(long sessionId);
+
+ public Date getCreatedDate();
+
+ public void setCreatedDate(Date createdDate);
+
+ public Date getUpdatedDate();
+
+ public void setUpdatedDate(Date updatedDate);
}
diff --git a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsSessionConnector.java b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsSessionConnector.java
index e2f4ac54..3a8885f8 100644
--- a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsSessionConnector.java
+++ b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsSessionConnector.java
@@ -2,7 +2,7 @@
* ============LICENSE_START=======================================================
* feature-session-persistence
* ================================================================================
- * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -20,19 +20,18 @@
package org.onap.policy.drools.persistence;
-public interface DroolsSessionConnector
-{
- /**
- * Gets a session by PDP id and name.
- * @param sessName
- * @return a session, or {@code null} if it is not found
- */
- public DroolsSession get(String sessName);
-
- /**
- * Replaces a session, adding it if it does not exist.
- * @param sess session to be replaced
- */
- public void replace(DroolsSession sess);
+public interface DroolsSessionConnector {
+ /**
+ * Gets a session by PDP id and name.
+ * @param sessName session name
+ * @return a session, or {@code null} if it is not found
+ */
+ public DroolsSession get(String sessName);
+
+ /**
+ * Replaces a session, adding it if it does not exist.
+ * @param sess session to be replaced
+ */
+ public void replace(DroolsSession sess);
}
diff --git a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsSessionEntity.java b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsSessionEntity.java
index b3616c43..117e6410 100644
--- a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsSessionEntity.java
+++ b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/DroolsSessionEntity.java
@@ -2,14 +2,14 @@
* ============LICENSE_START=======================================================
* feature-session-persistence
* ================================================================================
- * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
@@ -34,105 +34,101 @@ import javax.persistence.TemporalType;
@Entity
public class DroolsSessionEntity implements Serializable, DroolsSession {
- private static final long serialVersionUID = -5495057038819948709L;
-
- @Id
- @Column(name = "sessionName", nullable = false)
- private String sessionName = "-1";
-
- @Column(name = "sessionId", nullable = false)
- private long sessionId = -1L;
-
- @Temporal(TemporalType.TIMESTAMP)
- @Column(name = "createdDate", nullable = false)
- private Date createdDate;
-
- @Temporal(TemporalType.TIMESTAMP)
- @Column(name = "updatedDate", nullable = false)
- private Date updatedDate;
-
- public DroolsSessionEntity() {
-
- }
-
- public DroolsSessionEntity(String sessionName, long sessionId) {
- this.sessionName = sessionName;
- this.sessionId = sessionId;
-
- }
-
- @PrePersist
- public void prePersist() {
- this.createdDate = new Date();
- this.updatedDate = new Date();
- }
-
- @PreUpdate
- public void preUpdate() {
- this.updatedDate = new Date();
- }
-
- @Override
- public String getSessionName() {
- return sessionName;
- }
-
- @Override
- public void setSessionName(String sessionName) {
- this.sessionName = sessionName;
- }
-
- @Override
- public long getSessionId() {
- return sessionId;
- }
-
- @Override
- public void setSessionId(long sessionId) {
- this.sessionId = sessionId;
- }
-
- @Override
- public Date getCreatedDate() {
- return createdDate;
- }
-
- @Override
- public void setCreatedDate(Date createdDate) {
- this.createdDate = createdDate;
- }
-
- @Override
- public Date getUpdatedDate() {
- return updatedDate;
- }
-
- @Override
- public void setUpdatedDate(Date updatedDate) {
- this.updatedDate = updatedDate;
- }
-
- @Override
- public boolean equals(Object other) {
- if (other instanceof DroolsSession) {
- DroolsSession p = (DroolsSession) other;
- return this.getSessionName().equals(p.getSessionName());
- } else {
- return false;
- }
- }
-
- @Override
- public int hashCode() {
- final int prime = 31;
- int result = 1;
- result = prime * result + getSessionName().hashCode();
- return result;
- }
-
- @Override
- public String toString() {
- return "{name=" + getSessionName() + ", id=" + getSessionId() + "}";
- }
-
+ private static final long serialVersionUID = -5495057038819948709L;
+
+ @Id
+ @Column(name = "sessionName", nullable = false)
+ private String sessionName = "-1";
+
+ @Column(name = "sessionId", nullable = false)
+ private long sessionId = -1L;
+
+ @Temporal(TemporalType.TIMESTAMP)
+ @Column(name = "createdDate", nullable = false)
+ private Date createdDate;
+
+ @Temporal(TemporalType.TIMESTAMP)
+ @Column(name = "updatedDate", nullable = false)
+ private Date updatedDate;
+
+ public DroolsSessionEntity() {}
+
+ public DroolsSessionEntity(String sessionName, long sessionId) {
+ this.sessionName = sessionName;
+ this.sessionId = sessionId;
+ }
+
+ @PrePersist
+ public void prePersist() {
+ this.createdDate = new Date();
+ this.updatedDate = new Date();
+ }
+
+ @PreUpdate
+ public void preUpdate() {
+ this.updatedDate = new Date();
+ }
+
+ @Override
+ public String getSessionName() {
+ return sessionName;
+ }
+
+ @Override
+ public void setSessionName(String sessionName) {
+ this.sessionName = sessionName;
+ }
+
+ @Override
+ public long getSessionId() {
+ return sessionId;
+ }
+
+ @Override
+ public void setSessionId(long sessionId) {
+ this.sessionId = sessionId;
+ }
+
+ @Override
+ public Date getCreatedDate() {
+ return createdDate;
+ }
+
+ @Override
+ public void setCreatedDate(Date createdDate) {
+ this.createdDate = createdDate;
+ }
+
+ @Override
+ public Date getUpdatedDate() {
+ return updatedDate;
+ }
+
+ @Override
+ public void setUpdatedDate(Date updatedDate) {
+ this.updatedDate = updatedDate;
+ }
+
+ @Override
+ public boolean equals(Object other) {
+ if (other instanceof DroolsSession) {
+ DroolsSession session = (DroolsSession) other;
+ return this.getSessionName().equals(session.getSessionName());
+ } else {
+ return false;
+ }
+ }
+
+ @Override
+ public int hashCode() {
+ final int prime = 31;
+ int result = 1;
+ result = prime * result + getSessionName().hashCode();
+ return result;
+ }
+
+ @Override
+ public String toString() {
+ return "{name=" + getSessionName() + ", id=" + getSessionId() + "}";
+ }
}
diff --git a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/EntityMgrTrans.java b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/EntityMgrTrans.java
index 47ed221e..3d276519 100644
--- a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/EntityMgrTrans.java
+++ b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/EntityMgrTrans.java
@@ -7,9 +7,9 @@
* 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.
@@ -32,109 +32,99 @@ import javax.transaction.UserTransaction;
import org.onap.policy.common.utils.jpa.EntityMgrCloser;
/**
- * Wrapper for an <i>EntityManager</i> that creates a JTA transaction that is
- * auto-rolled back when closed.
+ * Wrapper for an <i>EntityManager</i> that creates a JTA transaction that is auto-rolled back when
+ * closed.
*/
public class EntityMgrTrans extends EntityMgrCloser {
- /**
- * Transaction to be rolled back.
- */
- private static UserTransaction userTrans = com.arjuna.ats.jta.UserTransaction.userTransaction();
-
- /**
- *
- * @param em
- * entity for which a transaction is to be begun
- */
- public EntityMgrTrans(EntityManager em) {
- super(em);
-
- try {
- userTrans.begin();
- em.joinTransaction();
-
- } catch (RuntimeException |NotSupportedException | SystemException e) {
- em.close();
- throw new EntityMgrException(e);
- }
- }
-
- /**
- * Gets the user transaction. For use by junit tests.
- *
- * @return the user transaction
- */
- protected static UserTransaction getUserTrans() {
- return userTrans;
- }
-
- /**
- * Sets the user transaction. For use by junit tests.
- *
- * @param userTrans
- * the new user transaction
- */
- protected static void setUserTrans(UserTransaction userTrans) {
- EntityMgrTrans.userTrans = userTrans;
- }
-
- /**
- * Commits the transaction.
- */
- public void commit() {
- try {
- userTrans.commit();
-
- } catch (SecurityException | IllegalStateException | RollbackException | HeuristicMixedException
- | HeuristicRollbackException | SystemException e) {
-
- throw new EntityMgrException(e);
- }
- }
-
- /**
- * Rolls back the transaction.
- */
- public void rollback() {
- try {
- userTrans.rollback();
-
- } catch (IllegalStateException | SecurityException | SystemException e) {
- throw new EntityMgrException(e);
- }
- }
-
- @Override
- public void close() {
- try {
- if (userTrans.getStatus() == Status.STATUS_ACTIVE) {
- userTrans.rollback();
- }
-
- } catch (IllegalStateException | SecurityException | SystemException e) {
- throw new EntityMgrException(e);
-
- } finally {
- super.close();
- }
- }
-
- /**
- * Runtime exceptions generated by this class. Wraps exceptions generated by
- * delegated operations, particularly when they are not, themselves, Runtime
- * exceptions.
- */
- public static class EntityMgrException extends RuntimeException {
- private static final long serialVersionUID = 1L;
-
- /**
- *
- * @param e
- * exception to be wrapped
- */
- public EntityMgrException(Exception e) {
- super(e);
- }
- }
+ /** Transaction to be rolled back. */
+ private static UserTransaction userTrans = com.arjuna.ats.jta.UserTransaction.userTransaction();
+
+ /**
+ * Constructor.
+ *
+ * @param em entity for which a transaction is to be begun */
+ public EntityMgrTrans(EntityManager em) {
+ super(em);
+
+ try {
+ userTrans.begin();
+ em.joinTransaction();
+
+ } catch (RuntimeException | NotSupportedException | SystemException e) {
+ em.close();
+ throw new EntityMgrException(e);
+ }
+ }
+
+ /**
+ * Gets the user transaction. For use by junit tests.
+ *
+ * @return the user transaction
+ */
+ protected static UserTransaction getUserTrans() {
+ return userTrans;
+ }
+
+ /**
+ * Sets the user transaction. For use by junit tests.
+ *
+ * @param userTrans the new user transaction
+ */
+ protected static void setUserTrans(UserTransaction userTrans) {
+ EntityMgrTrans.userTrans = userTrans;
+ }
+
+ /** Commits the transaction. */
+ public void commit() {
+ try {
+ userTrans.commit();
+
+ } catch (SecurityException
+ | IllegalStateException
+ | RollbackException
+ | HeuristicMixedException
+ | HeuristicRollbackException
+ | SystemException e) {
+
+ throw new EntityMgrException(e);
+ }
+ }
+
+ /** Rolls back the transaction. */
+ public void rollback() {
+ try {
+ userTrans.rollback();
+
+ } catch (IllegalStateException | SecurityException | SystemException e) {
+ throw new EntityMgrException(e);
+ }
+ }
+
+ @Override
+ public void close() {
+ try {
+ if (userTrans.getStatus() == Status.STATUS_ACTIVE) {
+ userTrans.rollback();
+ }
+
+ } catch (IllegalStateException | SecurityException | SystemException e) {
+ throw new EntityMgrException(e);
+
+ } finally {
+ super.close();
+ }
+ }
+
+ /**
+ * Runtime exceptions generated by this class. Wraps exceptions generated by delegated operations,
+ * particularly when they are not, themselves, Runtime exceptions.
+ */
+ public static class EntityMgrException extends RuntimeException {
+ private static final long serialVersionUID = 1L;
+
+ public EntityMgrException(Exception ex) {
+ super(ex);
+ }
+ }
}
diff --git a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/JpaDroolsSessionConnector.java b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/JpaDroolsSessionConnector.java
index cd76ae8d..381a896e 100644
--- a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/JpaDroolsSessionConnector.java
+++ b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/JpaDroolsSessionConnector.java
@@ -2,14 +2,14 @@
* ============LICENSE_START=======================================================
* feature-session-persistence
* ================================================================================
- * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
+ * Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
@@ -28,89 +28,84 @@ import org.slf4j.LoggerFactory;
public class JpaDroolsSessionConnector implements DroolsSessionConnector {
- private static Logger logger = LoggerFactory.getLogger(JpaDroolsSessionConnector.class);
+ private static Logger logger = LoggerFactory.getLogger(JpaDroolsSessionConnector.class);
- private final EntityManagerFactory emf;
+ private final EntityManagerFactory emf;
- public JpaDroolsSessionConnector(EntityManagerFactory emf) {
- this.emf = emf;
- }
+ public JpaDroolsSessionConnector(EntityManagerFactory emf) {
+ this.emf = emf;
+ }
- @Override
- public DroolsSession get(String sessName) {
+ @Override
+ public DroolsSession get(String sessName) {
- EntityManager em = emf.createEntityManager();
- DroolsSessionEntity s = null;
+ EntityManager em = emf.createEntityManager();
+ DroolsSessionEntity entity = null;
- try (EntityMgrTrans trans = new EntityMgrTrans(em)) {
+ try (EntityMgrTrans trans = new EntityMgrTrans(em)) {
- s = em.find(DroolsSessionEntity.class, sessName);
- if (s != null) {
- em.refresh(s);
- }
+ entity = em.find(DroolsSessionEntity.class, sessName);
+ if (entity != null) {
+ em.refresh(entity);
+ }
- trans.commit();
- }
+ trans.commit();
+ }
- return s;
- }
+ return entity;
+ }
- @Override
- public void replace(DroolsSession sess) {
- String sessName = sess.getSessionName();
+ @Override
+ public void replace(DroolsSession sess) {
+ String sessName = sess.getSessionName();
- logger.info("replace: Entering and manually updating session name= {}", sessName);
+ logger.info("replace: Entering and manually updating session name= {}", sessName);
- EntityManager em = emf.createEntityManager();
+ EntityManager em = emf.createEntityManager();
- try (EntityMgrTrans trans = new EntityMgrTrans(em)) {
+ try (EntityMgrTrans trans = new EntityMgrTrans(em)) {
- if (!update(em, sess)) {
- add(em, sess);
- }
+ if (!update(em, sess)) {
+ add(em, sess);
+ }
- trans.commit();
- }
+ trans.commit();
+ }
- logger.info("replace: Exiting");
- }
+ logger.info("replace: Exiting");
+ }
- /**
- * Adds a session to the persistent store.
- *
- * @param em
- * entity manager
- * @param sess
- * session to be added
- */
- private void add(EntityManager em, DroolsSession sess) {
- logger.info("add: Inserting session id={}", sess.getSessionId());
+ /**
+ * Adds a session to the persistent store.
+ *
+ * @param em entity manager
+ * @param sess session to be added
+ */
+ private void add(EntityManager em, DroolsSession sess) {
+ logger.info("add: Inserting session id={}", sess.getSessionId());
- DroolsSessionEntity ent = new DroolsSessionEntity(sess.getSessionName(), sess.getSessionId());
+ DroolsSessionEntity ent = new DroolsSessionEntity(sess.getSessionName(), sess.getSessionId());
- em.persist(ent);
- }
+ em.persist(ent);
+ }
- /**
- * Updates a session, if it exists within the persistent store.
- *
- * @param em
- * entity manager
- * @param sess
- * session data to be persisted
- * @return {@code true} if a record was updated, {@code false} if it was not
- * found
- */
- private boolean update(EntityManager em, DroolsSession sess) {
+ /**
+ * Updates a session, if it exists within the persistent store.
+ *
+ * @param em entity manager
+ * @param sess session data to be persisted
+ * @return {@code true} if a record was updated, {@code false} if it was not found
+ */
+ private boolean update(EntityManager em, DroolsSession sess) {
- DroolsSessionEntity s = em.find(DroolsSessionEntity.class, sess.getSessionName());
- if (s == null) {
- return false;
- }
+ DroolsSessionEntity s = em.find(DroolsSessionEntity.class, sess.getSessionName());
+ if (s == null) {
+ return false;
+ }
- logger.info("update: Updating session id to {}", sess.getSessionId());
- s.setSessionId(sess.getSessionId());
+ logger.info("update: Updating session id to {}", sess.getSessionId());
+ s.setSessionId(sess.getSessionId());
- return true;
- }
+ return true;
+ }
}
diff --git a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/PersistenceFeature.java b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/PersistenceFeature.java
index 129be8a7..7b17de6c 100644
--- a/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/PersistenceFeature.java
+++ b/feature-session-persistence/src/main/java/org/onap/policy/drools/persistence/PersistenceFeature.java
@@ -7,9 +7,9 @@
* 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.
@@ -54,971 +54,898 @@ import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
- * If this feature is supported, there is a single instance of it. It adds
- * persistence to Drools sessions. In addition, if an active-standby feature
- * exists, then that is used to determine the active and last-active PDP. If it
- * does not exist, then the current host name is used as the PDP id.
+ * If this feature is supported, there is a single instance of it. It adds persistence to Drools
+ * sessions. In addition, if an active-standby feature exists, then that is used to determine the
+ * active and last-active PDP. If it does not exist, then the current host name is used as the PDP
+ * id.
*
- * The bulk of the code here was once in other classes, such as
- * 'PolicyContainer' and 'Main'. It was moved here as part of making this a
- * separate optional feature.
+ * <p>The bulk of the code here was once in other classes, such as 'PolicyContainer' and 'Main'. It
+ * was moved here as part of making this a separate optional feature.
*/
public class PersistenceFeature implements PolicySessionFeatureAPI, PolicyEngineFeatureAPI {
- private static final Logger logger = LoggerFactory.getLogger(PersistenceFeature.class);
-
- /**
- * Standard factory used to get various items.
- */
- private static Factory stdFactory = new Factory();
-
- /**
- * Factory used to get various items.
- */
- private Factory fact = stdFactory;
-
- /**
- * KieService factory.
- */
- private KieServices kieSvcFact;
-
- /**
- * Persistence properties.
- */
- private Properties persistProps;
-
- /**
- * Whether or not the SessionInfo records should be cleaned out.
- */
- private boolean sessInfoCleaned;
-
- /**
- * SessionInfo timeout, in milli-seconds, as read from
- * {@link #persistProps}.
- */
- private long sessionInfoTimeoutMs;
-
- /**
- * Object used to serialize cleanup of sessioninfo table.
- */
- private Object cleanupLock = new Object();
-
- /**
- * Sets the factory to be used during junit testing.
- *
- * @param fact
- * factory to be used
- */
- protected void setFactory(Factory fact) {
- this.fact = fact;
- }
-
- /**
- * Lookup the adjunct for this feature that is associated with the specified
- * PolicyContainer. If not found, create one.
- *
- * @param policyContainer
- * the container whose adjunct we are looking up, and possibly
- * creating
- * @return the associated 'ContainerAdjunct' instance, which may be new
- */
- private ContainerAdjunct getContainerAdjunct(PolicyContainer policyContainer) {
-
- Object rval = policyContainer.getAdjunct(this);
-
- if (rval == null || !(rval instanceof ContainerAdjunct)) {
- // adjunct does not exist, or has the wrong type (should never
- // happen)
- rval = new ContainerAdjunct(policyContainer);
- policyContainer.setAdjunct(this, rval);
- }
-
- return (ContainerAdjunct) rval;
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public int getSequenceNumber() {
- return 1;
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public void globalInit(String[] args, String configDir) {
-
- kieSvcFact = fact.getKieServices();
-
- try {
- persistProps = fact.loadProperties(configDir + "/feature-session-persistence.properties");
-
- } catch (IOException e1) {
- logger.error("initializePersistence: ", e1);
- }
-
- sessionInfoTimeoutMs = getPersistenceTimeout();
- }
-
- /**
- * Creates a persistent KieSession, loading it from the persistent store, or
- * creating one, if it does not exist yet.
- */
- @Override
- public KieSession activatePolicySession(PolicyContainer policyContainer, String name, String kieBaseName) {
-
- if (isPersistenceEnabled(policyContainer, name)) {
- cleanUpSessionInfo();
-
- return getContainerAdjunct(policyContainer).newPersistentKieSession(name, kieBaseName);
- }
-
- return null;
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public PolicySession.ThreadModel selectThreadModel(PolicySession session) {
-
- PolicyContainer policyContainer = session.getPolicyContainer();
- if (isPersistenceEnabled(policyContainer, session.getName())) {
- return new PersistentThreadModel(session, getProperties(policyContainer));
- }
- return null;
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public void disposeKieSession(PolicySession policySession) {
-
- ContainerAdjunct contAdj = (ContainerAdjunct) policySession.getPolicyContainer().getAdjunct(this);
- if (contAdj != null) {
- contAdj.disposeKieSession(policySession.getName());
- }
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public void destroyKieSession(PolicySession policySession) {
-
- ContainerAdjunct contAdj = (ContainerAdjunct) policySession.getPolicyContainer().getAdjunct(this);
- if (contAdj != null) {
- contAdj.destroyKieSession(policySession.getName());
- }
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public boolean afterStart(PolicyEngine engine) {
- return false;
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public boolean beforeStart(PolicyEngine engine) {
- synchronized (cleanupLock) {
- sessInfoCleaned = false;
- }
-
- return false;
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public boolean beforeActivate(PolicyEngine engine) {
- synchronized (cleanupLock) {
- sessInfoCleaned = false;
- }
-
- return false;
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public boolean afterActivate(PolicyEngine engine) {
- return false;
- }
-
- /* ============================================================ */
-
- /**
- * Gets the persistence timeout value for sessioninfo records.
- *
- * @return the timeout value, in milli-seconds, or {@code -1} if it is
- * unspecified or invalid
- */
- private long getPersistenceTimeout() {
- String timeoutString = null;
-
- try {
- timeoutString = persistProps.getProperty(DroolsPersistenceProperties.DB_SESSIONINFO_TIMEOUT);
-
- if (timeoutString != null) {
- // timeout parameter is specified
- return Long.valueOf(timeoutString) * 1000;
- }
-
- } catch (NumberFormatException e) {
- logger.error("Invalid value for Drools persistence property persistence.sessioninfo.timeout: {}",
- timeoutString, e);
- }
-
- return -1;
- }
-
- /* ============================================================ */
-
- /**
- * Each instance of this class is a logical extension of a 'PolicyContainer'
- * instance. Its reference is stored in the 'adjuncts' table within the
- * 'PolicyContainer', and will be garbage-collected with the container.
- */
- protected class ContainerAdjunct {
- /**
- * 'PolicyContainer' instance that this adjunct is extending.
- */
- private PolicyContainer policyContainer;
-
- /**
- * Maps a KIE session name to its data source.
- */
- private Map<String, DsEmf> name2ds = new HashMap<>();
-
- /**
- * Constructor - initialize a new 'ContainerAdjunct'
- *
- * @param policyContainer
- * the 'PolicyContainer' instance this adjunct is extending
- */
- private ContainerAdjunct(PolicyContainer policyContainer) {
- this.policyContainer = policyContainer;
- }
-
- /**
- * Create a new persistent KieSession. If there is already a
- * corresponding entry in the database, it is used to initialize the
- * KieSession. If not, a completely new session is created.
- *
- * @param name
- * the name of the KieSession (which is also the name of the
- * associated PolicySession)
- * @param kieBaseName
- * the name of the 'KieBase' instance containing this session
- * @return a new KieSession with persistence enabled
- */
- private KieSession newPersistentKieSession(String name, String kieBaseName) {
-
- configureSysProps();
-
- BasicDataSource ds = fact.makeDataSource(getDataSourceProperties());
- DsEmf dsemf = new DsEmf(ds);
-
- try {
- EntityManagerFactory emf = dsemf.emf;
- DroolsSessionConnector conn = fact.makeJpaConnector(emf);
-
- long desiredSessionId = getSessionId(conn, name);
-
- logger.info("\n\nThis controller is primary... coming up with session {} \n\n", desiredSessionId);
-
- // session does not exist -- attempt to create one
- logger.info("getPolicySession:session does not exist -- attempt to create one with name {}", name);
-
- Environment env = kieSvcFact.newEnvironment();
-
- configureKieEnv(env, emf);
-
- KieSessionConfiguration kConf = kieSvcFact.newKieSessionConfiguration();
-
- KieSession kieSession = (desiredSessionId >= 0
- ? loadKieSession(kieBaseName, desiredSessionId, env, kConf) : null);
-
- if (kieSession == null) {
- // loadKieSession() returned null or desiredSessionId < 0
- logger.info("LOADING We cannot load session {}. Going to create a new one", desiredSessionId);
-
- kieSession = newKieSession(kieBaseName, env);
- }
-
- replaceSession(conn, name, kieSession);
-
- name2ds.put(name, dsemf);
-
- return kieSession;
-
- } catch (RuntimeException e) {
- dsemf.close();
- throw e;
- }
- }
-
- /**
- * Loads an existing KieSession from the persistent store.
- *
- * @param kieBaseName
- * the name of the 'KieBase' instance containing this session
- * @param desiredSessionId
- * id of the desired KieSession
- * @param env
- * Kie Environment for the session
- * @param kConf
- * Kie Configuration for the session
- * @return the persistent session, or {@code null} if it could not be
- * loaded
- */
- private KieSession loadKieSession(String kieBaseName, long desiredSessionId, Environment env,
- KieSessionConfiguration kConf) {
- try {
- KieSession kieSession = kieSvcFact.getStoreServices().loadKieSession(desiredSessionId,
- policyContainer.getKieContainer().getKieBase(kieBaseName), kConf, env);
-
- logger.info("LOADING Loaded session {}", desiredSessionId);
-
- return kieSession;
-
- } catch (Exception e) {
- logger.error("loadKieSession error: ", e);
- return null;
- }
- }
-
- /**
- * Creates a new, persistent KieSession.
- *
- * @param kieBaseName
- * the name of the 'KieBase' instance containing this session
- * @param env
- * Kie Environment for the session
- * @return a new, persistent session
- */
- private KieSession newKieSession(String kieBaseName, Environment env) {
- KieSession kieSession = kieSvcFact.getStoreServices()
- .newKieSession(policyContainer.getKieContainer().getKieBase(kieBaseName), null, env);
-
- logger.info("LOADING CREATED {}", kieSession.getIdentifier());
-
- return kieSession;
- }
-
- /**
- * Closes the data source associated with a session.
- *
- * @param name
- * name of the session being destroyed
- */
- private void destroyKieSession(String name) {
- closeDataSource(name);
- }
-
- /**
- * Closes the data source associated with a session.
- *
- * @param name
- * name of the session being disposed of
- */
- private void disposeKieSession(String name) {
- closeDataSource(name);
- }
-
- /**
- * Closes the data source associated with a session.
- *
- * @param name
- * name of the session whose data source is to be closed
- */
- private void closeDataSource(String name) {
- DsEmf ds = name2ds.remove(name);
- if (ds != null) {
- ds.close();
- }
- }
-
- /**
- * Configures java system properties for JPA/JTA.
- */
- private void configureSysProps() {
- System.setProperty("com.arjuna.ats.arjuna.coordinator.defaultTimeout", "60");
- System.setProperty("com.arjuna.ats.arjuna.objectstore.objectStoreDir",
- persistProps.getProperty(DroolsPersistenceProperties.JTA_OBJECTSTORE_DIR));
- System.setProperty("ObjectStoreEnvironmentBean.objectStoreDir",
- persistProps.getProperty(DroolsPersistenceProperties.JTA_OBJECTSTORE_DIR));
- }
-
- /**
- * Configures a Kie Environment
- *
- * @param env
- * environment to be configured
- * @param emf
- * entity manager factory
- */
- private void configureKieEnv(Environment env, EntityManagerFactory emf) {
- env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);
- env.set(EnvironmentName.TRANSACTION, fact.getUserTrans());
- env.set(EnvironmentName.TRANSACTION_SYNCHRONIZATION_REGISTRY, fact.getTransSyncReg());
- env.set(EnvironmentName.TRANSACTION_MANAGER, fact.getTransMgr());
- }
-
- /**
- * Gets a session's ID from the persistent store.
- *
- * @param conn
- * persistence connector
- * @param sessnm
- * name of the session
- * @return the session's id, or {@code -1} if the session is not found
- */
- private long getSessionId(DroolsSessionConnector conn, String sessnm) {
- DroolsSession sess = conn.get(sessnm);
- return sess != null ? sess.getSessionId() : -1;
- }
-
- /**
- * Replaces a session within the persistent store, if it exists. Adds it
- * otherwise.
- *
- * @param conn
- * persistence connector
- * @param sessnm
- * name of session to be updated
- * @param kieSession
- * new session information
- */
- private void replaceSession(DroolsSessionConnector conn, String sessnm, KieSession kieSession) {
-
- DroolsSessionEntity sess = new DroolsSessionEntity();
-
- sess.setSessionName(sessnm);
- sess.setSessionId(kieSession.getIdentifier());
-
- conn.replace(sess);
- }
- }
-
- /* ============================================================ */
-
- /**
- * Gets the data source properties.
- *
- * @return the data source properties
- */
- private Properties getDataSourceProperties() {
- Properties props = new Properties();
- props.put("driverClassName", persistProps.getProperty(DroolsPersistenceProperties.DB_DRIVER));
- props.put("url", persistProps.getProperty(DroolsPersistenceProperties.DB_URL));
- props.put("username", persistProps.getProperty(DroolsPersistenceProperties.DB_USER));
- props.put("password", persistProps.getProperty(DroolsPersistenceProperties.DB_PWD));
- props.put("maxActive", "3");
- props.put("maxIdle", "1");
- props.put("maxWait", "120000");
- props.put("whenExhaustedAction", "2");
- props.put("testOnBorrow", "false");
- props.put("poolPreparedStatements", "true");
-
- return props;
- }
-
- /**
- * Removes "old" Drools 'sessioninfo' records, so they aren't used to
- * restore data to Drools sessions. This also has the useful side-effect of
- * removing abandoned records as well.
- */
- private void cleanUpSessionInfo() {
-
- synchronized (cleanupLock) {
-
- if (sessInfoCleaned) {
- logger.info("Clean up of sessioninfo table: already done");
- return;
- }
-
- if (sessionInfoTimeoutMs < 0) {
- logger.info("Clean up of sessioninfo table: no timeout specified");
- return;
- }
-
- // now do the record deletion
- try (BasicDataSource ds = fact.makeDataSource(getDataSourceProperties());
- Connection connection = ds.getConnection();
- PreparedStatement statement = connection.prepareStatement(
- "DELETE FROM sessioninfo WHERE timestampdiff(second,lastmodificationdate,now()) > ?")) {
-
- connection.setAutoCommit(true);
-
- statement.setLong(1, sessionInfoTimeoutMs / 1000);
-
- int count = statement.executeUpdate();
- logger.info("Cleaning up sessioninfo table -- {} records removed", count);
-
- } catch (SQLException e) {
- logger.error("Clean up of sessioninfo table failed", e);
- }
-
- // TODO: delete DroolsSessionEntity where sessionId not in
- // (sessinfo.xxx)
-
- sessInfoCleaned = true;
- }
- }
-
- /**
- * Determine whether persistence is enabled for a specific container
- *
- * @param container
- * container to be checked
- * @param sessionName
- * name of the session to be checked
- * @return {@code true} if persistence is enabled for this container, and
- * {@code false} if not
- */
- private boolean isPersistenceEnabled(PolicyContainer container, String sessionName) {
- Properties properties = getProperties(container);
- boolean rval = false;
-
- if (properties != null) {
- // fetch the 'type' property
- String type = getProperty(properties, sessionName, "type");
- rval = "auto".equals(type) || "native".equals(type);
- }
-
- return rval;
- }
-
- /**
- * Determine the controller properties associated with the policy container.
- *
- * @param container
- * container whose properties are to be retrieved
- * @return the container's properties, or {@code null} if not found
- */
- private Properties getProperties(PolicyContainer container) {
- try {
- return fact.getPolicyController(container).getProperties();
- } catch (IllegalArgumentException e) {
- logger.error("getProperties exception: ", e);
- return null;
- }
- }
-
- /**
- * Fetch the persistence property associated with a session. The name may
- * have the form:
- * <ul>
- * <li>persistence.SESSION-NAME.PROPERTY</li>
- * <li>persistence.PROPERTY</li>
- * </ul>
- *
- * @param properties
- * properties from which the value is to be retrieved
- * @param sessionName
- * session name of interest
- * @param property
- * property name of interest
- * @return the property value, or {@code null} if not found
- */
- private String getProperty(Properties properties, String sessionName, String property) {
- String value = properties.getProperty("persistence." + sessionName + "." + property);
- if (value == null) {
- value = properties.getProperty("persistence." + property);
- }
-
- return value;
- }
-
- /* ============================================================ */
-
- /**
- * This 'ThreadModel' variant periodically calls
- * 'KieSession.fireAllRules()', because the 'fireUntilHalt' method isn't
- * compatible with persistence.
- */
- public class PersistentThreadModel implements Runnable, PolicySession.ThreadModel {
-
- /**
- * Session associated with this persistent thread.
- */
- private final PolicySession session;
-
- /**
- * The session thread.
- */
- private final Thread thread;
-
- /**
- * Used to indicate that processing should stop.
- */
- private final CountDownLatch stopped = new CountDownLatch(1);
-
- /**
- * Minimum time, in milli-seconds, that the thread should sleep before
- * firing rules again.
- */
- long minSleepTime = 100;
-
- /**
- * Maximum time, in milli-seconds, that the thread should sleep before
- * firing rules again. This is a "half" time, so that we can multiply it
- * by two without overflowing the word size.
- */
- long halfMaxSleepTime = 5000L / 2L;
-
- /**
- * Constructor - initialize variables and create thread
- *
- * @param session
- * the 'PolicySession' instance
- * @param properties
- * may contain additional session properties
- */
- public PersistentThreadModel(PolicySession session, Properties properties) {
- this.session = session;
- this.thread = new Thread(this, getThreadName());
-
- if (properties == null) {
- return;
- }
-
- // extract 'minSleepTime' and/or 'maxSleepTime'
- String name = session.getName();
-
- // fetch 'minSleepTime' value, and update if defined
- String sleepTimeString = getProperty(properties, name, "minSleepTime");
- if (sleepTimeString != null) {
- try {
- minSleepTime = Math.max(1, Integer.valueOf(sleepTimeString));
- } catch (Exception e) {
- logger.error(sleepTimeString + ": Illegal value for 'minSleepTime'", e);
- }
- }
-
- // fetch 'maxSleepTime' value, and update if defined
- long maxSleepTime = 2 * halfMaxSleepTime;
- sleepTimeString = getProperty(properties, name, "maxSleepTime");
- if (sleepTimeString != null) {
- try {
- maxSleepTime = Math.max(1, Integer.valueOf(sleepTimeString));
- } catch (Exception e) {
- logger.error(sleepTimeString + ": Illegal value for 'maxSleepTime'", e);
- }
- }
-
- // swap values if needed
- if (minSleepTime > maxSleepTime) {
- logger.error("minSleepTime(" + minSleepTime + ") is greater than maxSleepTime(" + maxSleepTime
- + ") -- swapping");
- long tmp = minSleepTime;
- minSleepTime = maxSleepTime;
- maxSleepTime = tmp;
- }
-
- halfMaxSleepTime = Math.max(1, maxSleepTime / 2);
- }
-
- /**
- * @return the String to use as the thread name
- */
- private String getThreadName() {
- return "Session " + session.getFullName() + " (persistent)";
- }
-
- /***************************/
- /* 'ThreadModel' interface */
- /***************************/
-
- /**
- * {@inheritDoc}
- */
- @Override
- public void start() {
- thread.start();
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public void stop() {
- // tell the thread to stop
- stopped.countDown();
-
- // wait up to 10 seconds for the thread to stop
- try {
- thread.join(10000);
-
- } catch (InterruptedException e) {
- logger.error("stopThread exception: ", e);
- Thread.currentThread().interrupt();
- }
-
- // verify that it's done
- if (thread.isAlive()) {
- logger.error("stopThread: still running");
- }
- }
-
- /**
- * {@inheritDoc}
- */
- @Override
- public void updated() {
- // the container artifact has been updated -- adjust the thread name
- thread.setName(getThreadName());
- }
-
- /************************/
- /* 'Runnable' interface */
- /************************/
-
- /**
- * {@inheritDoc}
- */
- @Override
- public void run() {
- logger.info("PersistentThreadModel running");
-
- // set thread local variable
- session.setPolicySession();
-
- KieSession kieSession = session.getKieSession();
- long sleepTime = 2 * halfMaxSleepTime;
-
- // We want to continue, despite any exceptions that occur
- // while rules are fired.
-
- boolean cont = true;
- while(cont) {
-
- try {
- if (kieSession.fireAllRules() > 0) {
- // some rules fired -- reduce poll delay
- sleepTime = Math.max(minSleepTime, sleepTime / 2);
- } else {
- // no rules fired -- increase poll delay
- sleepTime = 2 * Math.min(halfMaxSleepTime, sleepTime);
- }
-
- } catch (Exception | LinkageError e) {
- logger.error("Exception during kieSession.fireAllRules", e);
- }
-
-
- try {
- if (stopped.await(sleepTime, TimeUnit.MILLISECONDS)) {
- cont = false;
- }
-
- } catch (InterruptedException e) {
- logger.error("startThread exception: ", e);
- Thread.currentThread().interrupt();
- cont = false;
- }
- }
-
- logger.info("PersistentThreadModel completed");
- }
- }
-
- /* ============================================================ */
-
- /**
- * DataSource-EntityManagerFactory pair.
- */
- private class DsEmf {
- private BasicDataSource bds;
- private EntityManagerFactory emf;
-
- /**
- * Makes an entity manager factory for the given data source.
- *
- * @param bds
- * pooled data source
- */
- public DsEmf(BasicDataSource bds) {
- try {
- Map<String, Object> props = new HashMap<>();
- props.put(org.hibernate.cfg.Environment.JPA_JTA_DATASOURCE, bds);
-
- this.bds = bds;
- this.emf = fact.makeEntMgrFact(props);
-
- } catch (RuntimeException e) {
- closeDataSource();
- throw e;
- }
- }
-
- /**
- * Closes the entity manager factory and the data source.
- */
- public void close() {
- try {
- emf.close();
-
- } catch (RuntimeException e) {
- closeDataSource();
- throw e;
- }
-
- closeDataSource();
- }
-
- /**
- * Closes the data source only.
- */
- private void closeDataSource() {
- try {
- bds.close();
-
- } catch (SQLException e) {
- throw new PersistenceFeatureException(e);
- }
-
- }
- }
-
- private static class SingletonRegistry {
- private static final TransactionSynchronizationRegistry transreg = new com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionSynchronizationRegistryImple();
-
- private SingletonRegistry() {
- super();
- }
- }
-
- /**
- * Factory for various items. Methods can be overridden for junit testing.
- */
- protected static class Factory {
-
- /**
- * Gets the transaction manager.
- *
- * @return the transaction manager
- */
- public TransactionManager getTransMgr() {
- return com.arjuna.ats.jta.TransactionManager.transactionManager();
- }
-
- /**
- * Gets the user transaction.
- *
- * @return the user transaction
- */
- public UserTransaction getUserTrans() {
- return com.arjuna.ats.jta.UserTransaction.userTransaction();
- }
-
- /**
- * Gets the transaction synchronization registry.
- *
- * @return the transaction synchronization registry
- */
- public TransactionSynchronizationRegistry getTransSyncReg() {
- return SingletonRegistry.transreg;
- }
-
- /**
- * Gets the KIE services.
- *
- * @return the KIE services
- */
- public KieServices getKieServices() {
- return KieServices.Factory.get();
- }
-
- /**
- * Loads properties from a file.
- *
- * @param filenm
- * name of the file to load
- * @return properties, as loaded from the file
- * @throws IOException
- * if an error occurs reading from the file
- */
- public Properties loadProperties(String filenm) throws IOException {
- return PropertyUtil.getProperties(filenm);
- }
-
- /**
- * Makes a Data Source.
- *
- * @param dsProps
- * data source properties
- * @return a new data source
- */
- public BasicDataSource makeDataSource(Properties dsProps) {
- try {
- return BasicDataSourceFactory.createDataSource(dsProps);
-
- } catch (Exception e) {
- throw new PersistenceFeatureException(e);
- }
- }
-
- /**
- * Makes a new JPA connector for drools sessions.
- *
- * @param emf
- * entity manager factory
- * @return a new JPA connector for drools sessions
- */
- public DroolsSessionConnector makeJpaConnector(EntityManagerFactory emf) {
- return new JpaDroolsSessionConnector(emf);
- }
-
- /**
- * Makes a new entity manager factory.
- *
- * @param props
- * properties with which the factory should be configured
- * @return a new entity manager factory
- */
- public EntityManagerFactory makeEntMgrFact(Map<String, Object> props) {
- return Persistence.createEntityManagerFactory("onapsessionsPU", props);
- }
-
- /**
- * Gets the policy controller associated with a given policy container.
- *
- * @param container
- * container whose controller is to be retrieved
- * @return the container's controller
- */
- public PolicyController getPolicyController(PolicyContainer container) {
- return PolicyController.factory.get(container.getGroupId(), container.getArtifactId());
- }
- }
-
- /**
- * Runtime exceptions generated by this class. Wraps exceptions generated by
- * delegated operations, particularly when they are not, themselves, Runtime
- * exceptions.
- */
- public static class PersistenceFeatureException extends RuntimeException {
- private static final long serialVersionUID = 1L;
-
- /**
- *
- * @param e
- * exception to be wrapped
- */
- public PersistenceFeatureException(Exception e) {
- super(e);
- }
- }
+ private static final Logger logger = LoggerFactory.getLogger(PersistenceFeature.class);
+
+ /** Standard factory used to get various items. */
+ private static Factory stdFactory = new Factory();
+
+ /** Factory used to get various items. */
+ private Factory fact = stdFactory;
+
+ /** KieService factory. */
+ private KieServices kieSvcFact;
+
+ /** Persistence properties. */
+ private Properties persistProps;
+
+ /** Whether or not the SessionInfo records should be cleaned out. */
+ private boolean sessInfoCleaned;
+
+ /** SessionInfo timeout, in milli-seconds, as read from
+ * {@link #persistProps}. */
+ private long sessionInfoTimeoutMs;
+
+ /** Object used to serialize cleanup of sessioninfo table. */
+ private Object cleanupLock = new Object();
+
+ /**
+ * Sets the factory to be used during junit testing.
+ *
+ * @param fact factory to be used
+ */
+ protected void setFactory(Factory fact) {
+ this.fact = fact;
+ }
+
+ /**
+ * Lookup the adjunct for this feature that is associated with the specified PolicyContainer. If
+ * not found, create one.
+ *
+ * @param policyContainer the container whose adjunct we are looking up, and possibly creating
+ * @return the associated 'ContainerAdjunct' instance, which may be new
+ */
+ private ContainerAdjunct getContainerAdjunct(PolicyContainer policyContainer) {
+
+ Object rval = policyContainer.getAdjunct(this);
+
+ if (rval == null || !(rval instanceof ContainerAdjunct)) {
+ // adjunct does not exist, or has the wrong type (should never
+ // happen)
+ rval = new ContainerAdjunct(policyContainer);
+ policyContainer.setAdjunct(this, rval);
+ }
+
+ return (ContainerAdjunct) rval;
+ }
+
+ /**
+ * {@inheritDoc} */
+ @Override
+ public int getSequenceNumber() {
+ return 1;
+ }
+
+ /**
+ * {@inheritDoc} */
+ @Override
+ public void globalInit(String[] args, String configDir) {
+
+ kieSvcFact = fact.getKieServices();
+
+ try {
+ persistProps = fact.loadProperties(configDir + "/feature-session-persistence.properties");
+
+ } catch (IOException e1) {
+ logger.error("initializePersistence: ", e1);
+ }
+
+ sessionInfoTimeoutMs = getPersistenceTimeout();
+ }
+
+ /**
+ * Creates a persistent KieSession, loading it from the persistent store, or creating one, if it
+ * does not exist yet.
+ */
+ @Override
+ public KieSession activatePolicySession(
+ PolicyContainer policyContainer, String name, String kieBaseName) {
+
+ if (isPersistenceEnabled(policyContainer, name)) {
+ cleanUpSessionInfo();
+
+ return getContainerAdjunct(policyContainer).newPersistentKieSession(name, kieBaseName);
+ }
+
+ return null;
+ }
+
+ /**
+ * {@inheritDoc} */
+ @Override
+ public PolicySession.ThreadModel selectThreadModel(PolicySession session) {
+
+ PolicyContainer policyContainer = session.getPolicyContainer();
+ if (isPersistenceEnabled(policyContainer, session.getName())) {
+ return new PersistentThreadModel(session, getProperties(policyContainer));
+ }
+ return null;
+ }
+
+ /**
+ * {@inheritDoc} */
+ @Override
+ public void disposeKieSession(PolicySession policySession) {
+
+ ContainerAdjunct contAdj =
+ (ContainerAdjunct) policySession.getPolicyContainer().getAdjunct(this);
+ if (contAdj != null) {
+ contAdj.disposeKieSession(policySession.getName());
+ }
+ }
+
+ /**
+ * {@inheritDoc} */
+ @Override
+ public void destroyKieSession(PolicySession policySession) {
+
+ ContainerAdjunct contAdj =
+ (ContainerAdjunct) policySession.getPolicyContainer().getAdjunct(this);
+ if (contAdj != null) {
+ contAdj.destroyKieSession(policySession.getName());
+ }
+ }
+
+ /**
+ * {@inheritDoc} */
+ @Override
+ public boolean afterStart(PolicyEngine engine) {
+ return false;
+ }
+
+ /**
+ * {@inheritDoc} */
+ @Override
+ public boolean beforeStart(PolicyEngine engine) {
+ synchronized (cleanupLock) {
+ sessInfoCleaned = false;
+ }
+
+ return false;
+ }
+
+ /**
+ * {@inheritDoc} */
+ @Override
+ public boolean beforeActivate(PolicyEngine engine) {
+ synchronized (cleanupLock) {
+ sessInfoCleaned = false;
+ }
+
+ return false;
+ }
+
+ /**
+ * {@inheritDoc} */
+ @Override
+ public boolean afterActivate(PolicyEngine engine) {
+ return false;
+ }
+
+ /* ============================================================ */
+
+ /**
+ * Gets the persistence timeout value for sessioninfo records.
+ *
+ * @return the timeout value, in milli-seconds, or {@code -1} if it is unspecified or invalid
+ */
+ private long getPersistenceTimeout() {
+ String timeoutString = null;
+
+ try {
+ timeoutString = persistProps.getProperty(DroolsPersistenceProperties.DB_SESSIONINFO_TIMEOUT);
+
+ if (timeoutString != null) {
+ // timeout parameter is specified
+ return Long.valueOf(timeoutString) * 1000;
+ }
+
+ } catch (NumberFormatException e) {
+ logger.error(
+ "Invalid value for Drools persistence property persistence.sessioninfo.timeout: {}",
+ timeoutString,
+ e);
+ }
+
+ return -1;
+ }
+
+ /* ============================================================ */
+
+ /**
+ * Each instance of this class is a logical extension of a 'PolicyContainer' instance. Its
+ * reference is stored in the 'adjuncts' table within the 'PolicyContainer', and will be
+ * garbage-collected with the container.
+ */
+ protected class ContainerAdjunct {
+ /** 'PolicyContainer' instance that this adjunct is extending. */
+ private PolicyContainer policyContainer;
+
+ /** Maps a KIE session name to its data source. */
+ private Map<String, DsEmf> name2ds = new HashMap<>();
+
+ /**
+ * Constructor - initialize a new 'ContainerAdjunct'.
+ *
+ * @param policyContainer the 'PolicyContainer' instance this adjunct is extending
+ */
+ private ContainerAdjunct(PolicyContainer policyContainer) {
+ this.policyContainer = policyContainer;
+ }
+
+ /**
+ * Create a new persistent KieSession. If there is already a corresponding entry in the
+ * database, it is used to initialize the KieSession. If not, a completely new session is
+ * created.
+ *
+ * @param name the name of the KieSession (which is also the name of the associated
+ * PolicySession)
+ * @param kieBaseName the name of the 'KieBase' instance containing this session
+ * @return a new KieSession with persistence enabled
+ */
+ private KieSession newPersistentKieSession(String name, String kieBaseName) {
+
+ configureSysProps();
+
+ BasicDataSource ds = fact.makeDataSource(getDataSourceProperties());
+ DsEmf dsemf = new DsEmf(ds);
+
+ try {
+ EntityManagerFactory emf = dsemf.emf;
+ DroolsSessionConnector conn = fact.makeJpaConnector(emf);
+
+ long desiredSessionId = getSessionId(conn, name);
+
+ logger.info(
+ "\n\nThis controller is primary... coming up with session {} \n\n", desiredSessionId);
+
+ // session does not exist -- attempt to create one
+ logger.info(
+ "getPolicySession:session does not exist -- attempt to create one with name {}", name);
+
+ Environment env = kieSvcFact.newEnvironment();
+
+ configureKieEnv(env, emf);
+
+ KieSessionConfiguration kieConf = kieSvcFact.newKieSessionConfiguration();
+
+ KieSession kieSession =
+ (desiredSessionId >= 0
+ ? loadKieSession(kieBaseName, desiredSessionId, env, kieConf)
+ : null);
+
+ if (kieSession == null) {
+ // loadKieSession() returned null or desiredSessionId < 0
+ logger.info(
+ "LOADING We cannot load session {}. Going to create a new one", desiredSessionId);
+
+ kieSession = newKieSession(kieBaseName, env);
+ }
+
+ replaceSession(conn, name, kieSession);
+
+ name2ds.put(name, dsemf);
+
+ return kieSession;
+
+ } catch (RuntimeException e) {
+ dsemf.close();
+ throw e;
+ }
+ }
+
+ /**
+ * Loads an existing KieSession from the persistent store.
+ *
+ * @param kieBaseName the name of the 'KieBase' instance containing this session
+ * @param desiredSessionId id of the desired KieSession
+ * @param env Kie Environment for the session
+ * @param kConf Kie Configuration for the session
+ * @return the persistent session, or {@code null} if it could not be loaded
+ */
+ private KieSession loadKieSession(
+ String kieBaseName, long desiredSessionId, Environment env, KieSessionConfiguration kieConf) {
+ try {
+ KieSession kieSession =
+ kieSvcFact
+ .getStoreServices()
+ .loadKieSession(
+ desiredSessionId,
+ policyContainer.getKieContainer().getKieBase(kieBaseName),
+ kieConf,
+ env);
+
+ logger.info("LOADING Loaded session {}", desiredSessionId);
+
+ return kieSession;
+
+ } catch (Exception e) {
+ logger.error("loadKieSession error: ", e);
+ return null;
+ }
+ }
+
+ /**
+ * Creates a new, persistent KieSession.
+ *
+ * @param kieBaseName the name of the 'KieBase' instance containing this session
+ * @param env Kie Environment for the session
+ * @return a new, persistent session
+ */
+ private KieSession newKieSession(String kieBaseName, Environment env) {
+ KieSession kieSession =
+ kieSvcFact
+ .getStoreServices()
+ .newKieSession(policyContainer.getKieContainer().getKieBase(kieBaseName), null, env);
+
+ logger.info("LOADING CREATED {}", kieSession.getIdentifier());
+
+ return kieSession;
+ }
+
+ /**
+ * Closes the data source associated with a session.
+ *
+ * @param name name of the session being destroyed
+ */
+ private void destroyKieSession(String name) {
+ closeDataSource(name);
+ }
+
+ /**
+ * Closes the data source associated with a session.
+ *
+ * @param name name of the session being disposed of
+ */
+ private void disposeKieSession(String name) {
+ closeDataSource(name);
+ }
+
+ /**
+ * Closes the data source associated with a session.
+ *
+ * @param name name of the session whose data source is to be closed
+ */
+ private void closeDataSource(String name) {
+ DsEmf ds = name2ds.remove(name);
+ if (ds != null) {
+ ds.close();
+ }
+ }
+
+ /** Configures java system properties for JPA/JTA. */
+ private void configureSysProps() {
+ System.setProperty("com.arjuna.ats.arjuna.coordinator.defaultTimeout", "60");
+ System.setProperty(
+ "com.arjuna.ats.arjuna.objectstore.objectStoreDir",
+ persistProps.getProperty(DroolsPersistenceProperties.JTA_OBJECTSTORE_DIR));
+ System.setProperty(
+ "ObjectStoreEnvironmentBean.objectStoreDir",
+ persistProps.getProperty(DroolsPersistenceProperties.JTA_OBJECTSTORE_DIR));
+ }
+
+ /**
+ * Configures a Kie Environment.
+ *
+ * @param env environment to be configured
+ * @param emf entity manager factory
+ */
+ private void configureKieEnv(Environment env, EntityManagerFactory emf) {
+ env.set(EnvironmentName.ENTITY_MANAGER_FACTORY, emf);
+ env.set(EnvironmentName.TRANSACTION, fact.getUserTrans());
+ env.set(EnvironmentName.TRANSACTION_SYNCHRONIZATION_REGISTRY, fact.getTransSyncReg());
+ env.set(EnvironmentName.TRANSACTION_MANAGER, fact.getTransMgr());
+ }
+
+ /**
+ * Gets a session's ID from the persistent store.
+ *
+ * @param conn persistence connector
+ * @param sessnm name of the session
+ * @return the session's id, or {@code -1} if the session is not found
+ */
+ private long getSessionId(DroolsSessionConnector conn, String sessnm) {
+ DroolsSession sess = conn.get(sessnm);
+ return sess != null ? sess.getSessionId() : -1;
+ }
+
+ /**
+ * Replaces a session within the persistent store, if it exists. Adds it otherwise.
+ *
+ * @param conn persistence connector
+ * @param sessnm name of session to be updated
+ * @param kieSession new session information
+ */
+ private void replaceSession(DroolsSessionConnector conn, String sessnm, KieSession kieSession) {
+
+ DroolsSessionEntity sess = new DroolsSessionEntity();
+
+ sess.setSessionName(sessnm);
+ sess.setSessionId(kieSession.getIdentifier());
+
+ conn.replace(sess);
+ }
+ }
+
+ /* ============================================================ */
+
+ /**
+ * Gets the data source properties.
+ *
+ * @return the data source properties
+ */
+ private Properties getDataSourceProperties() {
+ Properties props = new Properties();
+ props.put("driverClassName", persistProps.getProperty(DroolsPersistenceProperties.DB_DRIVER));
+ props.put("url", persistProps.getProperty(DroolsPersistenceProperties.DB_URL));
+ props.put("username", persistProps.getProperty(DroolsPersistenceProperties.DB_USER));
+ props.put("password", persistProps.getProperty(DroolsPersistenceProperties.DB_PWD));
+ props.put("maxActive", "3");
+ props.put("maxIdle", "1");
+ props.put("maxWait", "120000");
+ props.put("whenExhaustedAction", "2");
+ props.put("testOnBorrow", "false");
+ props.put("poolPreparedStatements", "true");
+
+ return props;
+ }
+
+ /**
+ * Removes "old" Drools 'sessioninfo' records, so they aren't used to restore data to Drools
+ * sessions. This also has the useful side-effect of removing abandoned records as well.
+ */
+ private void cleanUpSessionInfo() {
+
+ synchronized (cleanupLock) {
+ if (sessInfoCleaned) {
+ logger.info("Clean up of sessioninfo table: already done");
+ return;
+ }
+
+ if (sessionInfoTimeoutMs < 0) {
+ logger.info("Clean up of sessioninfo table: no timeout specified");
+ return;
+ }
+
+ // now do the record deletion
+ try (BasicDataSource ds = fact.makeDataSource(getDataSourceProperties());
+ Connection connection = ds.getConnection();
+ PreparedStatement statement =
+ connection.prepareStatement(
+ "DELETE FROM sessioninfo WHERE timestampdiff(second,lastmodificationdate,now()) > ?")) {
+
+ connection.setAutoCommit(true);
+
+ statement.setLong(1, sessionInfoTimeoutMs / 1000);
+
+ int count = statement.executeUpdate();
+ logger.info("Cleaning up sessioninfo table -- {} records removed", count);
+
+ } catch (SQLException e) {
+ logger.error("Clean up of sessioninfo table failed", e);
+ }
+
+ // TODO: delete DroolsSessionEntity where sessionId not in
+ // (sessinfo.xxx)
+
+ sessInfoCleaned = true;
+ }
+ }
+
+ /**
+ * Determine whether persistence is enabled for a specific container.
+ *
+ * @param container container to be checked
+ * @param sessionName name of the session to be checked
+ * @return {@code true} if persistence is enabled for this container, and {@code false} if not
+ */
+ private boolean isPersistenceEnabled(PolicyContainer container, String sessionName) {
+ Properties properties = getProperties(container);
+ boolean rval = false;
+
+ if (properties != null) {
+ // fetch the 'type' property
+ String type = getProperty(properties, sessionName, "type");
+ rval = "auto".equals(type) || "native".equals(type);
+ }
+
+ return rval;
+ }
+
+ /**
+ * Determine the controller properties associated with the policy container.
+ *
+ * @param container container whose properties are to be retrieved
+ * @return the container's properties, or {@code null} if not found
+ */
+ private Properties getProperties(PolicyContainer container) {
+ try {
+ return fact.getPolicyController(container).getProperties();
+ } catch (IllegalArgumentException e) {
+ logger.error("getProperties exception: ", e);
+ return null;
+ }
+ }
+
+ /**
+ * Fetch the persistence property associated with a session. The name may have the form:
+ *
+ * <ul>
+ * <li>persistence.SESSION-NAME.PROPERTY
+ * <li>persistence.PROPERTY
+ * </ul>
+ *
+ * @param properties properties from which the value is to be retrieved
+ * @param sessionName session name of interest
+ * @param property property name of interest
+ * @return the property value, or {@code null} if not found
+ */
+ private String getProperty(Properties properties, String sessionName, String property) {
+ String value = properties.getProperty("persistence." + sessionName + "." + property);
+ if (value == null) {
+ value = properties.getProperty("persistence." + property);
+ }
+
+ return value;
+ }
+
+ /* ============================================================ */
+
+ /**
+ * This 'ThreadModel' variant periodically calls 'KieSession.fireAllRules()', because the
+ * 'fireUntilHalt' method isn't compatible with persistence.
+ */
+ public class PersistentThreadModel implements Runnable, PolicySession.ThreadModel {
+
+ /** Session associated with this persistent thread. */
+ private final PolicySession session;
+
+ /** The session thread. */
+ private final Thread thread;
+
+ /** Used to indicate that processing should stop. */
+ private final CountDownLatch stopped = new CountDownLatch(1);
+
+ /** Minimum time, in milli-seconds, that the thread should sleep before firing rules again. */
+ long minSleepTime = 100;
+
+ /**
+ * Maximum time, in milli-seconds, that the thread should sleep before firing rules again. This
+ * is a "half" time, so that we can multiply it by two without overflowing the word size.
+ */
+ long halfMaxSleepTime = 5000L / 2L;
+
+ /**
+ * Constructor - initialize variables and create thread.
+ *
+ * @param session the 'PolicySession' instance
+ * @param properties may contain additional session properties
+ */
+ public PersistentThreadModel(PolicySession session, Properties properties) {
+ this.session = session;
+ this.thread = new Thread(this, getThreadName());
+
+ if (properties == null) {
+ return;
+ }
+
+ // extract 'minSleepTime' and/or 'maxSleepTime'
+ String name = session.getName();
+
+ // fetch 'minSleepTime' value, and update if defined
+ String sleepTimeString = getProperty(properties, name, "minSleepTime");
+ if (sleepTimeString != null) {
+ try {
+ minSleepTime = Math.max(1, Integer.valueOf(sleepTimeString));
+ } catch (Exception e) {
+ logger.error(sleepTimeString + ": Illegal value for 'minSleepTime'", e);
+ }
+ }
+
+ // fetch 'maxSleepTime' value, and update if defined
+ long maxSleepTime = 2 * halfMaxSleepTime;
+ sleepTimeString = getProperty(properties, name, "maxSleepTime");
+ if (sleepTimeString != null) {
+ try {
+ maxSleepTime = Math.max(1, Integer.valueOf(sleepTimeString));
+ } catch (Exception e) {
+ logger.error(sleepTimeString + ": Illegal value for 'maxSleepTime'", e);
+ }
+ }
+
+ // swap values if needed
+ if (minSleepTime > maxSleepTime) {
+ logger.error(
+ "minSleepTime("
+ + minSleepTime
+ + ") is greater than maxSleepTime("
+ + maxSleepTime
+ + ") -- swapping");
+ long tmp = minSleepTime;
+ minSleepTime = maxSleepTime;
+ maxSleepTime = tmp;
+ }
+
+ halfMaxSleepTime = Math.max(1, maxSleepTime / 2);
+ }
+
+ /**
+ * Get thread name.
+ *
+ * @return the String to use as the thread name */
+ private String getThreadName() {
+ return "Session " + session.getFullName() + " (persistent)";
+ }
+
+ /** ************************ */
+ /* 'ThreadModel' interface */
+ /** ************************ */
+
+ /**
+ * {@inheritDoc} */
+ @Override
+ public void start() {
+ thread.start();
+ }
+
+ /**
+ * {@inheritDoc} */
+ @Override
+ public void stop() {
+ // tell the thread to stop
+ stopped.countDown();
+
+ // wait up to 10 seconds for the thread to stop
+ try {
+ thread.join(10000);
+
+ } catch (InterruptedException e) {
+ logger.error("stopThread exception: ", e);
+ Thread.currentThread().interrupt();
+ }
+
+ // verify that it's done
+ if (thread.isAlive()) {
+ logger.error("stopThread: still running");
+ }
+ }
+
+ /**
+ * {@inheritDoc} */
+ @Override
+ public void updated() {
+ // the container artifact has been updated -- adjust the thread name
+ thread.setName(getThreadName());
+ }
+
+ /** ********************* */
+ /* 'Runnable' interface */
+ /** ********************* */
+
+ /**
+ * {@inheritDoc} */
+ @Override
+ public void run() {
+ logger.info("PersistentThreadModel running");
+
+ // set thread local variable
+ session.setPolicySession();
+
+ KieSession kieSession = session.getKieSession();
+ long sleepTime = 2 * halfMaxSleepTime;
+
+ // We want to continue, despite any exceptions that occur
+ // while rules are fired.
+
+ boolean cont = true;
+ while (cont) {
+
+ try {
+ if (kieSession.fireAllRules() > 0) {
+ // some rules fired -- reduce poll delay
+ sleepTime = Math.max(minSleepTime, sleepTime / 2);
+ } else {
+ // no rules fired -- increase poll delay
+ sleepTime = 2 * Math.min(halfMaxSleepTime, sleepTime);
+ }
+
+ } catch (Exception | LinkageError e) {
+ logger.error("Exception during kieSession.fireAllRules", e);
+ }
+
+ try {
+ if (stopped.await(sleepTime, TimeUnit.MILLISECONDS)) {
+ cont = false;
+ }
+
+ } catch (InterruptedException e) {
+ logger.error("startThread exception: ", e);
+ Thread.currentThread().interrupt();
+ cont = false;
+ }
+ }
+
+ logger.info("PersistentThreadModel completed");
+ }
+ }
+
+ /* ============================================================ */
+
+ /** DataSource-EntityManagerFactory pair. */
+ private class DsEmf {
+ private BasicDataSource bds;
+ private EntityManagerFactory emf;
+
+ /**
+ * Makes an entity manager factory for the given data source.
+ *
+ * @param bds pooled data source
+ */
+ public DsEmf(BasicDataSource bds) {
+ try {
+ Map<String, Object> props = new HashMap<>();
+ props.put(org.hibernate.cfg.Environment.JPA_JTA_DATASOURCE, bds);
+
+ this.bds = bds;
+ this.emf = fact.makeEntMgrFact(props);
+
+ } catch (RuntimeException e) {
+ closeDataSource();
+ throw e;
+ }
+ }
+
+ /** Closes the entity manager factory and the data source. */
+ public void close() {
+ try {
+ emf.close();
+
+ } catch (RuntimeException e) {
+ closeDataSource();
+ throw e;
+ }
+
+ closeDataSource();
+ }
+
+ /** Closes the data source only. */
+ private void closeDataSource() {
+ try {
+ bds.close();
+
+ } catch (SQLException e) {
+ throw new PersistenceFeatureException(e);
+ }
+ }
+ }
+
+ private static class SingletonRegistry {
+ private static final TransactionSynchronizationRegistry transreg =
+ new com.arjuna.ats.internal.jta.transaction.arjunacore
+ .TransactionSynchronizationRegistryImple();
+
+ private SingletonRegistry() {
+ super();
+ }
+ }
+
+ /** Factory for various items. Methods can be overridden for junit testing. */
+ protected static class Factory {
+
+ /**
+ * Gets the transaction manager.
+ *
+ * @return the transaction manager
+ */
+ public TransactionManager getTransMgr() {
+ return com.arjuna.ats.jta.TransactionManager.transactionManager();
+ }
+
+ /**
+ * Gets the user transaction.
+ *
+ * @return the user transaction
+ */
+ public UserTransaction getUserTrans() {
+ return com.arjuna.ats.jta.UserTransaction.userTransaction();
+ }
+
+ /**
+ * Gets the transaction synchronization registry.
+ *
+ * @return the transaction synchronization registry
+ */
+ public TransactionSynchronizationRegistry getTransSyncReg() {
+ return SingletonRegistry.transreg;
+ }
+
+ /**
+ * Gets the KIE services.
+ *
+ * @return the KIE services
+ */
+ public KieServices getKieServices() {
+ return KieServices.Factory.get();
+ }
+
+ /**
+ * Loads properties from a file.
+ *
+ * @param filenm name of the file to load
+ * @return properties, as loaded from the file
+ * @throws IOException if an error occurs reading from the file
+ */
+ public Properties loadProperties(String filenm) throws IOException {
+ return PropertyUtil.getProperties(filenm);
+ }
+
+ /**
+ * Makes a Data Source.
+ *
+ * @param dsProps data source properties
+ * @return a new data source
+ */
+ public BasicDataSource makeDataSource(Properties dsProps) {
+ try {
+ return BasicDataSourceFactory.createDataSource(dsProps);
+
+ } catch (Exception e) {
+ throw new PersistenceFeatureException(e);
+ }
+ }
+
+ /**
+ * Makes a new JPA connector for drools sessions.
+ *
+ * @param emf entity manager factory
+ * @return a new JPA connector for drools sessions
+ */
+ public DroolsSessionConnector makeJpaConnector(EntityManagerFactory emf) {
+ return new JpaDroolsSessionConnector(emf);
+ }
+
+ /**
+ * Makes a new entity manager factory.
+ *
+ * @param props properties with which the factory should be configured
+ * @return a new entity manager factory
+ */
+ public EntityManagerFactory makeEntMgrFact(Map<String, Object> props) {
+ return Persistence.createEntityManagerFactory("onapsessionsPU", props);
+ }
+
+ /**
+ * Gets the policy controller associated with a given policy container.
+ *
+ * @param container container whose controller is to be retrieved
+ * @return the container's controller
+ */
+ public PolicyController getPolicyController(PolicyContainer container) {
+ return PolicyController.factory.get(container.getGroupId(), container.getArtifactId());
+ }
+ }
+
+ /**
+ * Runtime exceptions generated by this class. Wraps exceptions generated by delegated operations,
+ * particularly when they are not, themselves, Runtime exceptions.
+ */
+ public static class PersistenceFeatureException extends RuntimeException {
+ private static final long serialVersionUID = 1L;
+
+ /**
+ * Constructor.
+ * */
+ public PersistenceFeatureException(Exception ex) {
+ super(ex);
+ }
+ }
}