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PORandom errors with Threads and Hibernate sessions
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  1. PORandom errors with Threads and Hibernate sessions
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    copied!<p>Im using hibernate3 and spring.</p> <p>Java code:</p> <p>Class CommunicationServiceImpl, method sendAllMessages:</p> <pre><code>Collection&lt;MessageToSend&gt; messagesToSend = this.repositoriesLocator.getMessageToSendRepository().getMessagesToSend(); Iterator&lt;MessageToSend&gt; iteratorMesToSe = messagesToSend.iterator(); while (iteratorMesToSe.hasNext()) { MessageToSend mts = iteratorMesToSe.next(); MessageSender sender = new SmsSender(mts, this.repositoriesLocator); sender.start(); //run thread } </code></pre> <p>SmsSender:</p> <pre><code>public class SmsSender extends MessageSender { public SmsSender(MessageToSend messageToSend, RepositoriesLocator repositoriesLocator) { super(messageToSend, repositoriesLocator); } public void sendMessages() { try { MessageToSendSms messageToSendSms = (MessageToSendSms) this.messageToSend; Iterator&lt;CustomerByMessage&gt; itCbmsgs = messageToSendSms.getCustomerByMessage().iterator(); while (itCbmsgs.hasNext()) { CustomerByMessage cbm = (CustomerByMessage) itCbmsgs.next(); //sms sending String sResult = this.sendSMS(cb.getBody(), cbm.getCellPhone()); cbm.setStatus(CustomerByMessageStatus.SENT_OK); cbm.setSendingDate(Calendar.getInstance().getTime()); } messageToSendSms.setStatus(messageToSendStats.PROCESSED) this.log.info("saving messageToSend..."); //this line dont work! this.repositoriesLocator.getMessageToSendRepository().update(messageToSendSms); this.log.info("messageToSend saved!"); } catch (Exception e) { this.log.error("Error sms sender " + e.getMessage()); } } </code></pre> <p>This is a part of my appContext.xml:</p> <pre><code>&lt;bean id="serviceCommunication" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"&gt; &lt;property name="transactionManager"&gt; &lt;ref local="transactionManager" /&gt; &lt;/property&gt; &lt;property name="target"&gt; &lt;ref local="communicationServiceImpl" /&gt; &lt;/property&gt; &lt;property name="transactionAttributes"&gt; &lt;props&gt; &lt;prop key="*"&gt;PROPAGATION_REQUIRED&lt;/prop&gt; &lt;/props&gt; &lt;/property&gt; &lt;/bean&gt; &lt;bean id="communicationServiceImpl" class="com.ninatec.fnet3.services.communication.impl.CommunicationServiceImpl" parent="serviceParent"&gt; &lt;/bean&gt; </code></pre> <p>HibernateRepository<br> repositoriesLocator.getMessageToSendRepository().update CODE:</p> <pre><code>public void update(MessageToSend messageToSend) { try { this.getSession().update(messageToSend); } catch (HibernateException e) { this.log.error(e.getMessage(), e); throw e; } } </code></pre> <p>The entity MessageToSend, has never been updated.</p> <p>When I invoke CommunicationServiceImpl.sendAllMessages() I have in a collection all messagesToSend. For each MessageToSend I make a Thread to send the message. The Thread smsSender works good, but not the persistence in the data base. Changes in the object MessageToSend has not been updated in my database.</p> <p>Randoms errors are:</p> <p>session closed,</p> <p>could not initialize proxy - no Session,</p> <p>could not initialize proxy - the owning Session was closed,</p> <p>Illegal attempt to associate a collection with two open sessions in hibernate and</p> <p>failed to lazily initialize a collection of role: no session or session was closed</p> <hr> <ul> <li><ul> <li>about the thread. I want to use one thread for x sms. Every smsSender, send a group of sms.</li> </ul></li> </ul> <p>I dont understand how detach the objects from session explicitly in my architecture.</p>
 

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