Examples of org.springframework.transaction.support.TransactionTemplate

Package org.springframework.transaction.support

Examples of org.springframework.transaction.support.TransactionTemplate

org.springframework.transaction.support.TransactionTemplate
Template class that simplifies programmatic transaction demarcation and transaction exception handling.
The central method is {@link #execute}, supporting transactional code that implements the {@link TransactionCallback} interface. This template handlesthe transaction lifecycle and possible exceptions such that neither the TransactionCallback implementation nor the calling code needs to explicitly handle transactions.
Typical usage: Allows for writing low-level data access objects that use resources such as JDBC DataSources but are not transaction-aware themselves. Instead, they can implicitly participate in transactions handled by higher-level application services utilizing this class, making calls to the low-level services via an inner-class callback object.
Can be used within a service implementation via direct instantiation with a transaction manager reference, or get prepared in an application context and passed to services as bean reference. Note: The transaction manager should always be configured as bean in the application context: in the first case given to the service directly, in the second case given to the prepared template.
Supports setting the propagation behavior and the isolation level by name, for convenient configuration in context definitions. @author Juergen Hoeller @since 17.03.2003 @see #execute @see #setTransactionManager @see org.springframework.transaction.PlatformTransactionManager


    protected void cleanupRepository() {
        // must type cast with Spring 2.x
        jpaTemplate = applicationContext.getBean("jpaTemplate", JpaTemplate.class);


        TransactionTemplate transactionTemplate = new TransactionTemplate();
        transactionTemplate.setTransactionManager(new JpaTransactionManager(jpaTemplate.getEntityManagerFactory()));
        transactionTemplate.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);


        transactionTemplate.execute(new TransactionCallback<Boolean>() {
            public Boolean doInTransaction(TransactionStatus arg0) {
                @SuppressWarnings("rawtypes")
                List list = jpaTemplate.find(SELECT_ALL_STRING);
                for (Object item : list) {
                    jpaTemplate.remove(item);

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    protected EntityManager createEntityManager() {
        return getEntityManagerFactory().createEntityManager();
    }


    protected TransactionTemplate createTransactionTemplate() {
        TransactionTemplate transactionTemplate = new TransactionTemplate(getTransactionManager());
        transactionTemplate.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);
        transactionTemplate.afterPropertiesSet();
        return transactionTemplate;
    }

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                                                                    new SerializablePlaceholderResolverStrategy( ClassObjectMarshallingStrategyAcceptor.DEFAULT )} );


        final KnowledgeStoreService kstore = (KnowledgeStoreService) ctx.getBean( "kstore1" );
        final KnowledgeBase kbRollback = (KnowledgeBase) ctx.getBean( "kbRollback" );


        TransactionTemplate txTemplate = new TransactionTemplate( txManager );
        final StatefulKnowledgeSession ksession = (StatefulKnowledgeSession) txTemplate.execute( new TransactionCallback() {


            public Object doInTransaction(TransactionStatus status) {
                StatefulKnowledgeSession kNewSession = kstore.newStatefulKnowledgeSession( kbRollback,
                                                                                           null,
                                                                                           env );
                kNewSession.setGlobal( "list",
                                       list );
                kNewSession.insert( 1 );
                kNewSession.insert( 2 );
                return kNewSession;
            }
        } );


        final int sessionId = ksession.getId();


        txTemplate = new TransactionTemplate( txManager );
        txTemplate.execute( new TransactionCallback() {


            public Object doInTransaction(TransactionStatus status) {
                ksession.insert( 3 );
                status.setRollbackOnly();
                return null;
            }
        } );


        txTemplate = new TransactionTemplate( txManager );
        txTemplate.execute( new TransactionCallback() {


            public Object doInTransaction(TransactionStatus status) {
                ksession.fireAllRules();
                return null;
            }
        } );


        assertEquals( 2,
                      list.size() );


        txTemplate = new TransactionTemplate( txManager );
        txTemplate.execute( new TransactionCallback() {


            public Object doInTransaction(TransactionStatus status) {
                ksession.insert( 3 );
                ksession.insert( 4 );
                return null;
            }
        } );


        txTemplate = new TransactionTemplate( txManager );
        txTemplate.execute( new TransactionCallback() {


            public Object doInTransaction(TransactionStatus status) {
                ksession.insert( 5 );
                ksession.insert( 6 );
                status.setRollbackOnly();
                return null;
            }
        } );


        txTemplate = new TransactionTemplate( txManager );
        txTemplate.execute( new TransactionCallback() {


            public Object doInTransaction(TransactionStatus status) {
                ksession.fireAllRules();
                return null;
            }
        } );


        assertEquals( 4,
                      list.size() );


        ksession.dispose();


        // now load the ksession
        final StatefulKnowledgeSession ksession2 = JPAKnowledgeService.loadStatefulKnowledgeSession( sessionId,
                                                                                                     kbRollback,
                                                                                                     null,
                                                                                                     env );


        txTemplate = new TransactionTemplate( txManager );
        txTemplate.execute( new TransactionCallback() {


            public Object doInTransaction(TransactionStatus status) {
                ksession2.setGlobal( "list",
                                     list );
                ksession2.insert( 7 );
                ksession2.insert( 8 );
                return null;
            }
        } );


        txTemplate.execute( new TransactionCallback() {
            public Object doInTransaction(TransactionStatus status) {
                ksession2.fireAllRules();
                return null;
            }
        } );

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    public SpringTransactionPolicy(TransactionTemplate template) {
        this.template = template;
    }


    public Processor wrap(Processor processor) {
        final TransactionTemplate transactionTemplate = getTemplate();
        if (transactionTemplate == null) {
            LOG.warn("No TransactionTemplate available so transactions will not be enabled!");
            return processor;
        }

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        return answer;
    }


    public TransactionTemplate getTemplate() {
        if (template == null) {
            template = new TransactionTemplate(transactionManager);
            if (propagationBehaviorName != null) {
                template.setPropagationBehaviorName(propagationBehaviorName);
            }
        }
        return template;

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        overdueEndpoint.assertIsSatisfied();
    }


    protected void sendAMessages() {
        TransactionTemplate transaction = getMandatoryBean(TransactionTemplate.class, "transactionTemplate");
        transaction.execute(new TransactionCallbackWithoutResult() {
            protected void doInTransactionWithoutResult(TransactionStatus status) {
                template.sendBody("seda:a", "<hello id='123'>A</hello>");
                template.sendBody("seda:a", "<hello id='124'>B</hello>");
                template.sendBody("seda:a", "<hello id='125'>C</hello>");
            }

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            }
        });
    }


    protected void sendBMessages() {
        TransactionTemplate transaction = getMandatoryBean(TransactionTemplate.class, "transactionTemplate");
        transaction.execute(new TransactionCallbackWithoutResult() {
            protected void doInTransactionWithoutResult(TransactionStatus status) {
                template.sendBody("seda:b", "<hello id='123'>A</hello>");
                template.sendBody("seda:b", "<hello id='125'>C</hello>");
            }
        });

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    public static JpaTemplateTransactionStrategy newInstance(EntityManagerFactory emf, JpaTemplate template) {
        JpaTransactionManager transactionManager = new JpaTransactionManager(emf);
        transactionManager.afterPropertiesSet();


        TransactionTemplate tranasctionTemplate = new TransactionTemplate(transactionManager);
        tranasctionTemplate.afterPropertiesSet();


        return new JpaTemplateTransactionStrategy(template, tranasctionTemplate);
    }

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    public static JpaMessageIdRepository jpaMessageIdRepository(JpaTemplate jpaTemplate, String processorName) {
        return new JpaMessageIdRepository(jpaTemplate, processorName);
    }


    private static TransactionTemplate createTransactionTemplate(JpaTemplate jpaTemplate) {
        TransactionTemplate transactionTemplate = new TransactionTemplate();
        transactionTemplate.setTransactionManager(new JpaTransactionManager(jpaTemplate.getEntityManagerFactory()));
        transactionTemplate.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);
        return transactionTemplate;
    }

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    }


    protected void cleanupRepository() {
        jpaTemplate = (JpaTemplate)applicationContext.getBean("jpaTemplate", JpaTemplate.class);


        TransactionTemplate transactionTemplate = new TransactionTemplate();
        transactionTemplate.setTransactionManager(new JpaTransactionManager(jpaTemplate.getEntityManagerFactory()));
        transactionTemplate.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);


        transactionTemplate.execute(new TransactionCallback() {
            public Object doInTransaction(TransactionStatus arg0) {
                List list = jpaTemplate.find(SELECT_ALL_STRING, PROCESSOR_NAME);
                for (Object item : list) {
                    jpaTemplate.remove(item);
                }

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