Fix checkstyle for features submodules.

These are the remaining submodules that have checkstyle. Pretty
clean compile after this. There were a couple of sonar fixes
in there also.

Issue-ID: POLICY-882
Change-Id: I8191ea1aa261f4a7b9d3d21c108572fd31db1b8c
Signed-off-by: Pamela Dragosh <pdragosh@research.att.com>

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);
+        }
+    }
 }