Examples with KeyValueView org.apache.ignite.table.KeyValueView used on opensource projects

Example 1 with KeyValueView

use of org.apache.ignite.table.KeyValueView in project ignite-3 by apache.

the class TransactionsExample method main.

/**
 * Main method of the example.
 *
 * @param args The command line arguments.
 * @throws Exception If failed.
 */
public static void main(String[] args) throws Exception {
    try (Connection conn = DriverManager.getConnection("jdbc:ignite:thin://127.0.0.1:10800/");
        Statement stmt = conn.createStatement()) {
        stmt.executeUpdate("CREATE TABLE accounts (" + "accountNumber INT PRIMARY KEY," + "firstName     VARCHAR," + "lastName      VARCHAR," + "balance       DOUBLE)");
    }
    // --------------------------------------------------------------------------------------
    // 
    // Creating a client to connect to the cluster.
    // 
    // --------------------------------------------------------------------------------------
    System.out.println("\nConnecting to server...");
    try (IgniteClient client = IgniteClient.builder().addresses("127.0.0.1:10800").build()) {
        // --------------------------------------------------------------------------------------
        // 
        // Creating an account.
        // 
        // --------------------------------------------------------------------------------------
        KeyValueView<AccountKey, Account> accounts = client.tables().table("PUBLIC.accounts").keyValueView(AccountKey.class, Account.class);
        final AccountKey key = new AccountKey(123);
        accounts.put(null, key, new Account("John", "Doe", 1000.0d));
        System.out.println("\nInitial balance: " + accounts.get(null, key).balance);
        // --------------------------------------------------------------------------------------
        // 
        // Using synchronous transactional API to update the balance.
        // 
        // --------------------------------------------------------------------------------------
        client.transactions().runInTransaction(tx -> {
            Account account = accounts.get(tx, key);
            account.balance += 200.0d;
            accounts.put(tx, key, account);
        });
        System.out.println("\nBalance after the sync transaction: " + accounts.get(null, key).balance);
        // --------------------------------------------------------------------------------------
        // 
        // Using asynchronous transactional API to update the balance.
        // 
        // --------------------------------------------------------------------------------------
        CompletableFuture<Void> fut = client.transactions().beginAsync().thenCompose(tx -> accounts.getAsync(tx, key).thenCompose(account -> {
            account.balance += 300.0d;
            return accounts.putAsync(tx, key, account);
        }).thenCompose(ignored -> tx.commitAsync()));
        // Wait for completion.
        fut.join();
        System.out.println("\nBalance after the async transaction: " + accounts.get(null, key).balance);
    } finally {
        System.out.println("\nDropping the table...");
        try (Connection conn = DriverManager.getConnection("jdbc:ignite:thin://127.0.0.1:10800/");
            Statement stmt = conn.createStatement()) {
            stmt.executeUpdate("DROP TABLE accounts");
        }
    }
}