Examples with Transaction javax.jdo.Transaction used on opensource projects

Example 1 with Transaction

use of javax.jdo.Transaction in project OpenRefine by OpenRefine.

the class AppEngineRefineBrokerImpl method expireLocks.

protected void expireLocks(HttpServletResponse response) throws Exception {
    PersistenceManager pm = pmfInstance.getPersistenceManager();
    try {
        Extent<Lock> extent = pm.getExtent(Lock.class, false);
        try {
            for (Lock lock : extent) {
                if (lock.timestamp + LOCK_DURATION < System.currentTimeMillis()) {
                    Transaction tx = pm.currentTransaction();
                    try {
                        tx.begin();
                        pm.deletePersistent(lock);
                        tx.commit();
                    } finally {
                        if (tx.isActive()) {
                            tx.rollback();
                        }
                    }
                }
            }
        } finally {
            extent.closeAll();
        }
        respond(response, OK);
    } finally {
        pm.close();
    }
}

Example 2 with Transaction

use of javax.jdo.Transaction in project OpenRefine by OpenRefine.

the class AppEngineRefineBrokerImpl method obtainLock.

protected void obtainLock(HttpServletResponse response, String pid, String uid, int locktype, String lockvalue) throws Exception {
    PersistenceManager pm = pmfInstance.getPersistenceManager();
    try {
        Lock lock = getLock(pm, pid);
        if (lock == null) {
            Transaction tx = pm.currentTransaction();
            try {
                tx.begin();
                lock = new Lock(Long.toHexString(tx.hashCode()), pid, uid);
                pm.makePersistent(lock);
                tx.commit();
            } finally {
                if (tx.isActive()) {
                    tx.rollback();
                }
            }
        }
        respond(response, lockToJSON(lock));
    } finally {
        pm.close();
    }
}

Example 3 with Transaction

use of javax.jdo.Transaction in project OpenRefine by OpenRefine.

the class AppEngineRefineBrokerImpl method startProject.

// ----------------------------------------------------------------------------------------------------
protected void startProject(HttpServletResponse response, String pid, String uid, String lid, String data) throws Exception {
    PersistenceManager pm = pmfInstance.getPersistenceManager();
    try {
        checkLock(pm, pid, uid, lid);
        Project project = getProject(pm, pid);
        if (project != null) {
            throw new RuntimeException("Project '" + pid + "' already exists");
        }
        Transaction tx = pm.currentTransaction();
        try {
            tx.begin();
            project = new Project(pid, data);
            pm.makePersistent(project);
            tx.commit();
        } finally {
            if (tx.isActive()) {
                tx.rollback();
            }
        }
        respond(response, OK);
    } finally {
        pm.close();
    }
}

Example 4 with Transaction

use of javax.jdo.Transaction in project tutorials by eugenp.

the class GuideToJDO method QueryJPQL.

@SuppressWarnings({ "rawtypes", "unchecked" })
public void QueryJPQL() {
    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();
        // JPQL :
        LOGGER.log(Level.INFO, "JPQL --------------------------------------------------------------");
        Query q = pm.newQuery("JPQL", "SELECT p FROM " + Product.class.getName() + " p WHERE p.name = 'Laptop'");
        List results = (List) q.execute();
        Iterator<Product> iter = results.iterator();
        while (iter.hasNext()) {
            Product p = iter.next();
            LOGGER.log(Level.WARNING, "Product name: {0} - Price: {1}", new Object[] { p.name, p.price });
        }
        LOGGER.log(Level.INFO, "--------------------------------------------------------------");
        tx.commit();
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }
        pm.close();
    }
}

Example 5 with Transaction

use of javax.jdo.Transaction in project tutorials by eugenp.

the class GuideToJDO method UpdateProducts.

@SuppressWarnings("rawtypes")
public void UpdateProducts() {
    PersistenceManagerFactory pmf = new JDOPersistenceManagerFactory(pumd, null);
    PersistenceManager pm = pmf.getPersistenceManager();
    Transaction tx = pm.currentTransaction();
    try {
        tx.begin();
        Query query = pm.newQuery(Product.class, "name == \"Phone\"");
        Collection result = (Collection) query.execute();
        Product product = (Product) result.iterator().next();
        product.setName("Android Phone");
        tx.commit();
    } finally {
        if (tx.isActive()) {
            tx.rollback();
        }
        pm.close();
    }
}