Examples of org.exist.storage.txn.TransactionManager

org.exist.storage.txn.TransactionManager
This is the central entry point to the transaction management service. There's only one TransactionManager per database instance that can be retrieved via {@link BrokerPool#getTransactionManager()}. TransactionManager provides methods to create, commit and rollback a transaction. @author wolf

    }


    @BeforeClass
    public static void startDB() {
        DBBroker broker = null;
        TransactionManager transact = null;
        Txn transaction = null;
        try {
            File confFile = ConfigurationHelper.lookup("conf.xml");
            Configuration config = new Configuration(confFile.getAbsolutePath());
            BrokerPool.configure(1, 5, config);
            pool = BrokerPool.getInstance();
            assertNotNull(pool);
            broker = pool.get(pool.getSecurityManager().getSystemSubject());
            assertNotNull(broker);
            transact = pool.getTransactionManager();
            assertNotNull(transact);
            transaction = transact.beginTransaction();
            assertNotNull(transaction);
            System.out.println("Transaction started ...");


            Collection root = broker.getOrCreateCollection(transaction, TestConstants.TEST_COLLECTION_URI);
            assertNotNull(root);
            broker.saveCollection(transaction, root);


            transact.commit(transaction);
        } catch (Exception e) {
          transact.abort(transaction);
            e.printStackTrace();
            fail(e.getMessage());
        } finally {
            if (pool != null)
                pool.release(broker);

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public class TestUtils {
  
    public static void cleanupDB() {
        BrokerPool pool = null;
        DBBroker broker = null;
        TransactionManager transact = null;
        Txn transaction = null;
        try {
            pool = BrokerPool.getInstance();
            assertNotNull(pool);
            broker = pool.get(pool.getSecurityManager().getSystemSubject());
            assertNotNull(broker);
            transact = pool.getTransactionManager();
            assertNotNull(transact);
            transaction = transact.beginTransaction();
            assertNotNull(transaction);


            // Remove all collections below the /db root, except /db/system
            Collection root = broker.getOrCreateCollection(transaction, XmldbURI.ROOT_COLLECTION_URI);
            assertNotNull(root);
            for (Iterator<DocumentImpl> i = root.iterator(broker); i.hasNext(); ) {
                DocumentImpl doc = i.next();
                root.removeXMLResource(transaction, broker, doc.getURI().lastSegment());
            }
            broker.saveCollection(transaction, root);
            for (Iterator<XmldbURI> i = root.collectionIterator(broker); i.hasNext(); ) {
                XmldbURI childName = i.next();
                if (childName.equals("system"))
                    continue;
                Collection childColl = broker.getOrCreateCollection(transaction, XmldbURI.ROOT_COLLECTION_URI.append(childName));
                assertNotNull(childColl);
                broker.removeCollection(transaction, childColl);
            }


            // Remove /db/system/config/db and all collection configurations with it
            Collection config = broker.getOrCreateCollection(transaction,
                XmldbURI.create(XmldbURI.CONFIG_COLLECTION + "/db"));
            assertNotNull(config);
            broker.removeCollection(transaction, config);


            transact.commit(transaction);
        } catch (Exception e) {
          transact.abort(transaction);
            e.printStackTrace();
            fail(e.getMessage());
        } finally {
            if (pool != null) pool.release(broker);
        }

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    @AfterClass
    public static void closeDB() {
        BrokerPool pool = null;
        DBBroker broker = null;
        TransactionManager transact = null;
        Txn transaction = null;
        try {
            pool = BrokerPool.getInstance();
            assertNotNull(pool);
            broker = pool.get(pool.getSecurityManager().getSystemSubject());
            assertNotNull(broker);
            transact = pool.getTransactionManager();
            assertNotNull(transact);
            transaction = transact.beginTransaction();
            assertNotNull(transaction);
            System.out.println("Transaction started ...");


            Collection root = broker.getOrCreateCollection(transaction, TestConstants.TEST_COLLECTION_URI);
            assertNotNull(root);
            broker.removeCollection(transaction, root);


            Collection config = broker.getOrCreateCollection(transaction,
                XmldbURI.create(CollectionConfigurationManager.CONFIG_COLLECTION + "/db"));
            assertNotNull(config);
            broker.removeCollection(transaction, config);


            transact.commit(transaction);
        } catch (Exception e) {
          transact.abort(transaction);
            e.printStackTrace();
            fail(e.getMessage());
        } finally {
            if (pool != null) pool.release(broker);
        }

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        BrokerPool.stopAll(false);
    }


    private void configureAndStore(String config, String xml) {
        DBBroker broker = null;
        TransactionManager transact = null;
        Txn transaction = null;
        try {
            broker = pool.get(pool.getSecurityManager().getSystemSubject());
            assertNotNull(broker);
            transact = pool.getTransactionManager();
            assertNotNull(transact);
            transaction = transact.beginTransaction();
            assertNotNull(transaction);


            Collection root = broker.getOrCreateCollection(transaction, TestConstants.TEST_COLLECTION_URI);
            assertNotNull(root);
            CollectionConfigurationManager mgr = pool.getConfigurationManager();
            mgr.addConfiguration(transaction, broker, root, config);


            IndexInfo info = root.validateXMLResource(transaction, broker, XmldbURI.create("test_matches.xml"), xml);
            assertNotNull(info);
            root.store(transaction, broker, info, xml, false);
            
            transact.commit(transaction);
        } catch (Exception e) {
          transact.abort(transaction);
          e.printStackTrace();
          fail(e.getMessage());
        } finally {
            pool.release(broker);
        }

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    private static void createTestCollections() throws Exception {


        BrokerPool pool = BrokerPool.getInstance();
        DBBroker broker = null;
        TransactionManager transact = null;
        Txn txn = null;
        try {
            Subject admin = pool.getSecurityManager().authenticate(ADMIN_UID, ADMIN_PWD);


            broker = pool.get(admin);


            transact = pool.getTransactionManager();
            txn = transact.beginTransaction();


            /** create nessecary collections if they dont exist */
            Collection testCollection = broker.getOrCreateCollection(txn, XmldbURI.create(VALIDATION_HOME_COLLECTION_URI));
            testCollection.getPermissions().setOwner(GUEST_UID);
            broker.saveCollection(txn, testCollection);


            Collection col = broker.getOrCreateCollection(txn, XmldbURI.create(VALIDATION_HOME_COLLECTION_URI + "/" + TestTools.VALIDATION_DTD_COLLECTION));
            col.getPermissions().setOwner(GUEST_UID);
            broker.saveCollection(txn, col);


            col = broker.getOrCreateCollection(txn, XmldbURI.create(VALIDATION_HOME_COLLECTION_URI + "/" + TestTools.VALIDATION_XSD_COLLECTION));
            col.getPermissions().setOwner(GUEST_UID);
            broker.saveCollection(txn, col);


            col = broker.getOrCreateCollection(txn, XmldbURI.create(VALIDATION_HOME_COLLECTION_URI + "/" + TestTools.VALIDATION_TMP_COLLECTION));
            col.getPermissions().setOwner(GUEST_UID);
            broker.saveCollection(txn, col);


            transact.commit(txn);


        } catch (Exception e) {
            if(transact != null && txn != null) {
                transact.abort(txn);
            }
            throw e;
        } finally {
            if(broker != null) {
                pool.release(broker);

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    private static void removeTestCollections() throws Exception {


        BrokerPool pool = BrokerPool.getInstance();
        DBBroker broker = null;
        TransactionManager transact = null;
        Txn txn = null;
        try {
            Subject admin = pool.getSecurityManager().authenticate(ADMIN_UID, ADMIN_PWD);


            broker = pool.get(admin);


            transact = pool.getTransactionManager();
            txn = transact.beginTransaction();


            /** create nessecary collections if they dont exist */
            Collection testCollection = broker.getOrCreateCollection(txn, XmldbURI.create(VALIDATION_HOME_COLLECTION_URI));
            broker.removeCollection(txn, testCollection);


            transact.commit(txn);


        } catch (Exception e) {
            if(transact != null && txn != null) {
                transact.abort(txn);
            }
            throw e;
        } finally {
            if(broker != null) {
                pool.release(broker);

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        try {
            Configuration config = new Configuration();
            BrokerPool.configure(1, 5, config);
            pool = BrokerPool.getInstance();


            TransactionManager transact = pool.getTransactionManager();
            Txn transaction = transact.beginTransaction();
            broker = pool.get(pool.getSecurityManager().getSystemSubject());


            Collection root = broker.getOrCreateCollection(transaction, TEST_COLLECTION_URI);
            broker.saveCollection(transaction, root);


            IndexInfo info = root.validateXMLResource(transaction, broker, XmldbURI.create("test.xml"), TEST_DOC);
            root.store(transaction, broker, info, TEST_DOC, false);


            transact.commit(transaction);
        } catch (Exception e) {
            fail(e.getMessage());
        } finally {
            if (pool != null)
                pool.release(broker);

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    @AfterClass
    public static void shutdown() {
        DBBroker broker = null;
        try {
            TransactionManager transact = pool.getTransactionManager();
            Txn transaction = transact.beginTransaction();
            broker = pool.get(pool.getSecurityManager().getSystemSubject());


            Collection root = broker.getOrCreateCollection(transaction, TEST_COLLECTION_URI);
            broker.removeCollection(transaction, root);
            transact.commit(transaction);
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        } finally {
            pool.release(broker);

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    @Test
    public void xupdateUpdate() {
        DocumentSet docs = configureAndStore(COLLECTION_CONFIG2, XML2, "xupdate.xml");
        DBBroker broker = null;
        TransactionManager transact = null;
        Txn transaction = null;
        try {
            broker = pool.get(pool.getSecurityManager().getSystemSubject());
            transact = pool.getTransactionManager();
            transaction = transact.beginTransaction();


            Occurrences occur[] = checkIndex(docs, broker, new QName[] { new QName("description", "") }, "chair", 1);
            assertEquals("chair", occur[0].getTerm());
            checkIndex(docs, broker, new QName[] { new QName("item", "") }, null, 5);


            XQuery xquery = broker.getXQueryService();
            assertNotNull(xquery);
            Sequence seq = xquery.execute("//item[ft:query(description, 'chair')]", null, AccessContext.TEST);
            assertNotNull(seq);
            assertEquals(1, seq.getItemCount());


            // Update element content
            XUpdateProcessor proc = new XUpdateProcessor(broker, docs, AccessContext.TEST);
            assertNotNull(proc);
            proc.setBroker(broker);
            proc.setDocumentSet(docs);
            String xupdate =
                    XUPDATE_START +
                    "   <xu:update select=\"//item[@id = '1']/description\">wardrobe</xu:update>" +
                    XUPDATE_END;
            Modification[] modifications = proc.parse(new InputSource(new StringReader(xupdate)));
            assertNotNull(modifications);
            modifications[0].process(transaction);
            proc.reset();


            checkIndex(docs, broker, new QName[] { new QName("description", "") }, null, 3);
            checkIndex(docs, broker, new QName[] { new QName("item", "") }, null, 5);
            checkIndex(docs, broker, new QName[] { new QName("description", "") }, "chair", 0);
            checkIndex(docs, broker, new QName[] { new QName("item", "") }, "chair", 0);
            Occurrences o[] = checkIndex(docs, broker, new QName[] { new QName("description", "") }, "wardrobe", 1);
            assertEquals("wardrobe", o[0].getTerm());


            // Update text node
            proc.setBroker(broker);
            proc.setDocumentSet(docs);
            xupdate =
                    XUPDATE_START +
                    "   <xu:update select=\"//item[@id = '1']/description/text()\">Wheelchair</xu:update>" +
                    XUPDATE_END;
            modifications = proc.parse(new InputSource(new StringReader(xupdate)));
            assertNotNull(modifications);
            modifications[0].process(transaction);
            proc.reset();


            checkIndex(docs, broker, new QName[] { new QName("description", "") }, null, 3);
            checkIndex(docs, broker, new QName[] { new QName("item", "") }, null, 5);
            checkIndex(docs, broker, new QName[] { new QName("description", "") }, "wardrobe", 0);
            checkIndex(docs, broker, new QName[] { new QName("item", "") }, "wardrobe", 0);
            o = checkIndex(docs, broker, new QName[] { new QName("description", "") }, "wheelchair", 1);
            assertEquals("wheelchair", o[0].getTerm());


            // Update attribute value
            proc.setBroker(broker);
            proc.setDocumentSet(docs);
            xupdate =
                    XUPDATE_START +
                    "   <xu:update select=\"//item[@id = '1']/@attr\">abc</xu:update>" +
                    XUPDATE_END;
            modifications = proc.parse(new InputSource(new StringReader(xupdate)));
            assertNotNull(modifications);
            modifications[0].process(transaction);
            proc.reset();


            QName qnattr[] = { new QName("attr", "", "") };
            qnattr[0].setNameType(ElementValue.ATTRIBUTE);
            o = checkIndex(docs, broker, qnattr, null, 1);
            assertEquals("abc", o[0].getTerm());
            checkIndex(docs, broker, qnattr, "attribute", 0);


            transact.commit(transaction);
        } catch (Exception e) {
            if (transact != null)
                transact.abort(transaction);
            e.printStackTrace();
            fail(e.getMessage());
        } finally {
            if (pool != null) {
                pool.release(broker);

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    @Test
    public void xupdateReplace() {
        DocumentSet docs = configureAndStore(COLLECTION_CONFIG2, XML2, "xupdate.xml");
        DBBroker broker = null;
        TransactionManager transact = null;
        Txn transaction = null;
        try {
            broker = pool.get(pool.getSecurityManager().getSystemSubject());
            transact = pool.getTransactionManager();
            transaction = transact.beginTransaction();


            Occurrences occur[] = checkIndex(docs, broker, new QName[] { new QName("description", "") }, "chair", 1);
            assertEquals("chair", occur[0].getTerm());
            checkIndex(docs, broker, new QName[] { new QName("item", "") }, null, 5);


            XQuery xquery = broker.getXQueryService();
            assertNotNull(xquery);
            Sequence seq = xquery.execute("//item[ft:query(description, 'chair')]", null, AccessContext.TEST);
            assertNotNull(seq);
            assertEquals(1, seq.getItemCount());


            XUpdateProcessor proc = new XUpdateProcessor(broker, docs, AccessContext.TEST);
            assertNotNull(proc);
            proc.setBroker(broker);
            proc.setDocumentSet(docs);
            String xupdate =
                    XUPDATE_START +
                    "<xu:replace select=\"//item[@id = '1']\">" +
                    "<item id='4'><description>Wheelchair</description> <condition>poor</condition></item>" +
                    "</xu:replace>" +
                    XUPDATE_END;
            Modification[] modifications = proc.parse(new InputSource(new StringReader(xupdate)));
            assertNotNull(modifications);
            modifications[0].process(transaction);
            proc.reset();


            checkIndex(docs, broker, new QName[] { new QName("description", "") }, null, 3);
            checkIndex(docs, broker, new QName[] { new QName("condition", "") }, null, 3);
            checkIndex(docs, broker, new QName[] { new QName("item", "") }, null, 6);
            checkIndex(docs, broker, new QName[] { new QName("description", "") }, "chair", 0);
            checkIndex(docs, broker, new QName[] { new QName("item", "") }, "chair", 0);
            Occurrences o[] = checkIndex(docs, broker, new QName[] { new QName("description", "") }, "wheelchair", 1);
            assertEquals("wheelchair", o[0].getTerm());
            o = checkIndex(docs, broker, new QName[] { new QName("condition", "") }, "poor", 1);
            assertEquals("poor", o[0].getTerm());
            o = checkIndex(docs, broker, new QName[] { new QName("item", "") }, "wheelchair", 1);
            assertEquals("wheelchair", o[0].getTerm());
            o = checkIndex(docs, broker, new QName[] { new QName("item", "") }, "poor", 1);
            assertEquals("poor", o[0].getTerm());


            proc.setBroker(broker);
            proc.setDocumentSet(docs);
            xupdate =
                    XUPDATE_START +
                    "<xu:replace select=\"//item[@id = '4']/description\">" +
                    "<description>Armchair</description>" +
                    "</xu:replace>" +
                    XUPDATE_END;
            modifications = proc.parse(new InputSource(new StringReader(xupdate)));
            assertNotNull(modifications);
            modifications[0].process(transaction);
            proc.reset();


            checkIndex(docs, broker, new QName[] { new QName("description", "") }, null, 3);
            checkIndex(docs, broker, new QName[] { new QName("item", "") }, null, 6);
            checkIndex(docs, broker, new QName[] { new QName("description", "") }, "wheelchair", 0);
            checkIndex(docs, broker, new QName[] { new QName("item", "") }, "wheelchair", 0);
            o = checkIndex(docs, broker, new QName[] { new QName("description", "") }, "armchair", 1);
            assertEquals("armchair", o[0].getTerm());
            o = checkIndex(docs, broker, new QName[] { new QName("item", "") }, "armchair", 1);
            assertEquals("armchair", o[0].getTerm());


            transact.commit(transaction);
         } catch (Exception e) {
             if (transact != null)
                 transact.abort(transaction);
            e.printStackTrace();
            fail(e.getMessage());
        } finally {
            if (pool != null) {
                pool.release(broker);

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