Examples with Transaction com.jimmysun.algorithms.chapter2_1.Transaction used on opensource projects

Example 6 with Transaction

use of com.jimmysun.algorithms.chapter2_1.Transaction in project wildfly-swarm by wildfly-swarm.

the class StatefulTestBean method transactionEnlistmentReadAfterCallingTransactionClose.

public String transactionEnlistmentReadAfterCallingTransactionClose() {
    // JTA transaction is started by CMT, the following obtains a Session that is enlisted into the JTA transaction.
    Session session = injectedDriver.session();
    // Calls to Session.beginTransaction() in a JTA transaction are expected to throw a RuntimeException
    try {
        Transaction transaction = session.beginTransaction();
        fail("Calling Session.beginTransaction in a JTA transaction should throw a RuntimeException.");
    } catch (RuntimeException expectedException) {
    // success
    }
    try {
        session.run("CREATE (a:Person {name:'TRANSACTION', title:'King'})");
        return nestedBean.getPerson("TRANSACTION");
    } finally {
        if (session.isOpen()) {
            // this will be true
            session.run("MATCH (a:Person) delete a");
            // ignored, session is auto closed when the transaction ends.
            session.close();
        }
    }
}

Example 7 with Transaction

use of com.jimmysun.algorithms.chapter2_1.Transaction in project AlgorithmsSolutions by Allenskoo856.

the class TopM method main.

public static void main(String[] args) {
    int M = Integer.parseInt(args[0]);
    MinPQ<Transaction> pq = new MinPQ<Transaction>(M + 1);
    while (StdIn.hasNextLine()) {
        pq.insert(new Transaction(StdIn.readLine()));
        if (pq.size() > M) {
            pq.delMin();
        }
    }
    Stack<Transaction> stack = new Stack<Transaction>();
    while (!pq.isEmpty()) {
        stack.push(pq.delMin());
    }
    for (Transaction t : stack) {
        StdOut.println(t);
    }
}

Example 8 with Transaction

use of com.jimmysun.algorithms.chapter2_1.Transaction in project neo4j by neo4j.

the class BoltCausalClusteringIT method bookmarksShouldWorkWithDriverPinnedToSingleServer.

// Ensure that Bookmarks work with single instances using a driver created using a bolt[not+routing] URI.
@Test
public void bookmarksShouldWorkWithDriverPinnedToSingleServer() throws Exception {
    // given
    cluster = clusterRule.withNumberOfReadReplicas(1).startCluster();
    CoreClusterMember leader = cluster.awaitLeader();
    try (Driver driver = GraphDatabase.driver(leader.directURI(), AuthTokens.basic("neo4j", "neo4j"))) {
        String bookmark = inExpirableSession(driver, Driver::session, (session) -> {
            try (Transaction tx = session.beginTransaction()) {
                tx.run("CREATE (p:Person {name: {name} })", Values.parameters("name", "Alistair"));
                tx.success();
            }
            return session.lastBookmark();
        });
        assertNotNull(bookmark);
        try (Session session = driver.session();
            Transaction tx = session.beginTransaction(bookmark)) {
            Record record = tx.run("MATCH (n:Person) RETURN COUNT(*) AS count").next();
            assertEquals(1, record.get("count").asInt());
            tx.success();
        }
    }
}

Example 9 with Transaction

use of com.jimmysun.algorithms.chapter2_1.Transaction in project neo4j by neo4j.

the class BoltCausalClusteringIT method shouldUseBookmarkFromAReadSessionInAWriteSession.

@Test
public void shouldUseBookmarkFromAReadSessionInAWriteSession() throws Exception {
    // given
    cluster = clusterRule.withNumberOfReadReplicas(1).startCluster();
    CoreClusterMember leader = cluster.awaitLeader();
    try (Driver driver = GraphDatabase.driver(leader.directURI(), AuthTokens.basic("neo4j", "neo4j"))) {
        inExpirableSession(driver, (d) -> d.session(AccessMode.WRITE), (session) -> {
            session.run("CREATE (p:Person {name: {name} })", Values.parameters("name", "Jim"));
            return null;
        });
        String bookmark;
        try (Session session = driver.session(AccessMode.READ)) {
            try (Transaction tx = session.beginTransaction()) {
                tx.run("MATCH (n:Person) RETURN COUNT(*) AS count").next();
                tx.success();
            }
            bookmark = session.lastBookmark();
        }
        assertNotNull(bookmark);
        inExpirableSession(driver, (d) -> d.session(AccessMode.WRITE), (session) -> {
            try (Transaction tx = session.beginTransaction(bookmark)) {
                tx.run("CREATE (p:Person {name: {name} })", Values.parameters("name", "Alistair"));
                tx.success();
            }
            return null;
        });
        try (Session session = driver.session()) {
            Record record = session.run("MATCH (n:Person) RETURN COUNT(*) AS count").next();
            assertEquals(2, record.get("count").asInt());
        }
    }
}

Example 10 with Transaction

use of com.jimmysun.algorithms.chapter2_1.Transaction in project neo4j by neo4j.

the class BoltCausalClusteringIT method executeReadQuery.

private void executeReadQuery(String bookmark, Session session) {
    try (Transaction tx = session.beginTransaction(bookmark)) {
        Record record = tx.run("MATCH (n:Person) RETURN COUNT(*) AS count").next();
        assertEquals(1, record.get("count").asInt());
    }
}