package org.wso2.carbon.business.messaging.hl7.store.jpa;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.synapse.MessageContext;
import org.apache.synapse.config.SynapseConfiguration;
import org.apache.synapse.core.SynapseEnvironment;
import org.apache.synapse.core.axis2.Axis2MessageContext;
import org.apache.synapse.core.axis2.Axis2SynapseEnvironment;
import org.apache.synapse.message.MessageConsumer;
import org.apache.synapse.message.MessageProducer;
import org.apache.synapse.message.store.Constants;
import org.apache.synapse.message.store.MessageStore;
import org.wso2.carbon.business.messaging.hl7.store.entity.PersistentHL7Message;
import org.wso2.carbon.business.messaging.hl7.store.util.SerializableMessageContext;
import org.wso2.carbon.business.messaging.hl7.store.util.SerializerUtils;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.Query;
import java.io.IOException;
import java.util.*;
import java.util.concurrent.atomic.AtomicInteger;
public class JPAStore implements MessageStore {
private static final Log logger = LogFactory.getLog(JPAStore.class.getName());
/**
* synapse environment reference
*/
protected SynapseEnvironment synapseEnvironment;
private boolean isInitialized = false;
private String name;
private String description;
private Map<String, Object> parameters;
private String fileName;
private int maxProducerId = Integer.MAX_VALUE;
/** Message producer id */
private AtomicInteger producerId = new AtomicInteger(0);
/** Message consumer id */
private AtomicInteger consumerId = new AtomicInteger(0);
private EntityManagerFactory entityManagerFactory;
private ThreadLocal<EntityManager> localEntityManager = new ThreadLocal();
private Properties jpaProperties = new Properties();
private void parseParameters() {
for(String key : parameters.keySet()) {
this.jpaProperties.put(key, parameters.get(key));
}
if(!this.jpaProperties.containsKey("openjpa.FetchBatchSize")) {
this.jpaProperties.put("openjpa.FetchBatchSize", "1000");
}
if(!this.jpaProperties.containsKey("openjpa.jdbc.ResultSetType")) {
this.jpaProperties.put("openjpa.jdbc.ResultSetType", "scroll-insensitive");
}
if(!this.jpaProperties.containsKey("openjpa.jdbc.FetchDirection")) {
this.jpaProperties.put("openjpa.jdbc.FetchDirection", "forward");
}
if(!this.jpaProperties.containsKey("openjpa.jdbc.LRSSize")) {
this.jpaProperties.put("openjpa.jdbc.LRSSize", "last");
}
if(!this.jpaProperties.containsKey("openjpa.Multithreaded")) {
this.jpaProperties.put("openjpa.Multithreaded", "true");
}
if(!this.jpaProperties.containsKey("openjpa.MetaDataFactory")) {
this.jpaProperties.put("openjpa.MetaDataFactory","jpa(Types=" + PersistentHL7Message.class.getName() + ")");
}
if(!this.jpaProperties.containsKey("openjpa.jdbc.SynchronizeMappings")) {
this.jpaProperties.put("openjpa.jdbc.SynchronizeMappings", "buildSchema(ForeignKeys=true)");
}
if(!this.jpaProperties.contains("openjpa.Log")) {
this.jpaProperties.put("openjpa.Log", "none");
}
}
@Override
public void init(SynapseEnvironment synapseEnvironment) {
if(synapseEnvironment == null) {
logger.error("Cannot initialize HL7 JPA Store");
return;
}
this.synapseEnvironment = synapseEnvironment;
parseParameters();
this.isInitialized = initJPAStore();
if(this.isInitialized) {
logger.info(toString() + ". Initialized... ");
} else {
logger.warn(toString() + ". Initialization Failed... ");
}
}
public EntityManager getEntityManager() {
EntityManager em = localEntityManager.get();
if(em == null) {
em = entityManagerFactory.createEntityManager();
localEntityManager.set(em);
}
return em;
}
public void closeEntityManager() {
EntityManager em = localEntityManager.get();
if(em != null) {
em.close();
localEntityManager.set(null);
}
}
// TODO: add exception handling and logging
private boolean initJPAStore() {
// Create a new EntityManagerFactory using the System properties.
Properties prop = new Properties();
entityManagerFactory = Persistence.createEntityManagerFactory("hl7store", this.jpaProperties);
getEntityManager();
return true;
}
@Override
public void destroy() {
closeEntityManager();
if (this.entityManagerFactory != null && this.entityManagerFactory.isOpen()) {
this.entityManagerFactory.close();
}
}
@Override
public String getName() {
return this.name;
}
@Override
public void setName(String name) {
this.name = name;
}
@Override
public void setDescription(String description) {
this.description = description;
}
@Override
public String getDescription() {
return this.description;
}
@Override
public MessageProducer getProducer() {
JPAProducer producer = new JPAProducer(this);
producer.setId(nextProducerId());
return producer;
}
@Override
public MessageConsumer getConsumer() {
return null;
}
@Override
public void setParameters(Map<String, Object> parameters) {
this.parameters = parameters;
}
@Override
public Map<String, Object> getParameters() {
return this.parameters;
}
@Override
public int getType() {
return Constants.JDBC_MS;
}
@Override
public int size() {
EntityManager manager = getEntityManager();
Query q = manager.createQuery(
"SELECT x FROM " + getTableName() + " x WHERE x.storeName='" + getName() + "'");
int size = q.getResultList().size();
return size;
}
public PersistentHL7Message getMessage(String messageId) {
EntityManager manager = getEntityManager();
Query q = manager.createQuery(
"SELECT x FROM " + getTableName() + " x WHERE x.messageId='" + messageId + "' AND x.storeName='" + getName() + "'");
PersistentHL7Message result = (PersistentHL7Message) q.getSingleResult();
return result;
}
public List<PersistentHL7Message> getMessages() {
EntityManager manager = getEntityManager();
Query q = manager.createQuery(
"SELECT x FROM " + getTableName() + " x WHERE x.storeName='" + getName() + "' ORDER BY x.date DESC");
List<PersistentHL7Message> result = q.getResultList();
return result;
}
public List<PersistentHL7Message> search(String query) {
EntityManager manager = getEntityManager();
Query q = manager.createQuery("SELECT x FROM " + getTableName() + " x WHERE x.storeName='" + getName() + "' " +
"AND (x.controlId LIKE '" + query + "' OR x.messageId LIKE '" + query + "') ORDER BY x.date DESC");
List<PersistentHL7Message> result = q.getResultList();
return result;
}
public SynapseEnvironment getSynapseEnvironment() {
return synapseEnvironment;
}
public List<PersistentHL7Message> getMessages(int pageNumber, int rowsPerPage) {
pageNumber = pageNumber - 1; // offset
int itemsPerPageInt = rowsPerPage;
int numberOfPages = (int) Math.ceil((double) this.size() / itemsPerPageInt);
if(numberOfPages == 0) {
numberOfPages = 1;
}
if (pageNumber > numberOfPages - 1) {
pageNumber = numberOfPages - 1;
}
int startIndex = (pageNumber * itemsPerPageInt);
EntityManager manager = getEntityManager();
Query q = manager.createQuery(
"SELECT x FROM " + getTableName() + " x WHERE x.storeName='" + getName() + "' ORDER BY x.date DESC");
q.setFirstResult(startIndex);
q.setMaxResults(itemsPerPageInt);
List<PersistentHL7Message> result = q.getResultList();
return result;
}
public int flushMessages() {
EntityManager manager = getEntityManager();
manager.getTransaction().begin();
Query q = manager.createQuery(
"DELETE FROM " + getTableName() + " x WHERE x.storeName='" + getName() +"'");
int deleted = q.executeUpdate();
manager.getTransaction().commit();
return deleted;
}
@Override
public MessageContext remove() throws NoSuchElementException {
throw new UnsupportedOperationException("HL7 store does not support this operation.");
}
@Override
public void clear() {
throw new UnsupportedOperationException("HL7 store does not support this operation.");
}
@Override
public MessageContext remove(String s) {
throw new UnsupportedOperationException("HL7 store does not support this operation.");
}
@Override
public MessageContext get(int i) {
EntityManager manager = getEntityManager();
try {
Query q = manager.createQuery(
"SELECT x FROM " + getTableName() + " x WHERE x.storeName='" + getName() + "'");
List<PersistentHL7Message> messages = q.getResultList();
SerializableMessageContext serializableMessageContext = (SerializableMessageContext) SerializerUtils.deserialize(messages.get(i).getMessage());
return retrieveMessageContext(serializableMessageContext);
} catch (IOException e) {
logger.error("Error while deserializing message context object. " + e.getMessage());
} catch (ClassNotFoundException e) {
logger.error("Error while deserializing message context object. " + e.getMessage());
}
return null;
}
public org.apache.axis2.context.MessageContext newAxis2Mc() {
return ((Axis2SynapseEnvironment) synapseEnvironment)
.getAxis2ConfigurationContext().createMessageContext();
}
public org.apache.synapse.MessageContext newSynapseMc(
org.apache.axis2.context.MessageContext msgCtx) {
SynapseConfiguration configuration = synapseEnvironment.getSynapseConfiguration();
return new Axis2MessageContext(msgCtx, configuration, synapseEnvironment);
}
@Override
public List<MessageContext> getAll() {
EntityManager manager = getEntityManager();
Query q = manager.createQuery(
"SELECT x FROM " + getTableName() + " x WHERE x.storeName='" + getName() + "'");
List<PersistentHL7Message> messages = q.getResultList();
return retrieveMessageContextList(messages);
}
private List<MessageContext> retrieveMessageContextList(List<PersistentHL7Message> persistentHL7Messages) {
List<MessageContext> messageContexts = new ArrayList<MessageContext>();
for(PersistentHL7Message message: persistentHL7Messages) {
try {
SerializableMessageContext serializableMessageContext = (SerializableMessageContext) SerializerUtils.deserialize(message.getMessage());
messageContexts.add(retrieveMessageContext(serializableMessageContext));
} catch (ClassNotFoundException e) {
logger.error("Error while deserializing message context object. " + e.getMessage());
} catch (IOException e) {
logger.error("Error while deserializing message context object. " + e.getMessage());
}
}
return messageContexts;
}
private MessageContext retrieveMessageContext(SerializableMessageContext message) {
org.apache.axis2.context.MessageContext axis2Mc = this.newAxis2Mc();
MessageContext synapseMc = this.newSynapseMc(axis2Mc);
return SerializerUtils.toMessageContext(message, axis2Mc, synapseMc);
}
@Override
public MessageContext get(String s) {
EntityManager manager = getEntityManager();
try {
Query q = manager.createQuery(
"SELECT x FROM " + getTableName() + " x WHERE x.storeName='" + getName() + "' AND x.messageId='" + s +"'");
PersistentHL7Message message = (PersistentHL7Message) q.getSingleResult();
SerializableMessageContext serializableMessageContext = (SerializableMessageContext) SerializerUtils.deserialize(message.getMessage());
return retrieveMessageContext(serializableMessageContext);
} catch (IOException e) {
logger.error("Error while deserializing message context object. " + e.getMessage());
} catch (ClassNotFoundException e) {
logger.error("Error while deserializing message context object. " + e.getMessage());
}
return null;
}
@Override
public boolean isEdited() {
return false;
}
@Override
public void setIsEdited(boolean b) {
}
@Override
public String getArtifactContainerName() {
return null;
}
@Override
public void setArtifactContainerName(String s) {
}
private String getTableName() {
return PersistentHL7Message.class.getSimpleName();
}
@Override
public String toString() {
return "HL7 Store [" + getName() + "]";
}
@Override
public void setFileName(String fileName) {
this.fileName = fileName;
}
@Override
public String getFileName() {
return this.fileName;
}
private int nextConsumerId() {
int id = consumerId.incrementAndGet();
return id;
}
private int nextProducerId() {
int id = producerId.incrementAndGet();
if (id == maxProducerId) {
logger.info("Setting producer ID generator to 0...");
producerId.set(0);
id = producerId.incrementAndGet();
}
return id;
}
}