10.7.3. トランザクションの開始

UserTransaction のインスタンスを取得します。

• JNDI

  new InitialContext().lookup("java:comp/UserTransaction")

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• インジェクション

  @Resource UserTransaction userTransaction;

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• EjbContext

  EjbContext.getUserTransaction()

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データソースに接続後、UserTransaction.begin() を呼び出します。

...
try {
    System.out.println("\nCreating connection to database: "+url);
    stmt = conn.createStatement();  // non-tx statement
    try {
        System.out.println("Starting top-level transaction.");
        userTransaction.begin();
        stmtx = conn.createStatement(); // will be a tx-statement
        ...
    }
}

...
try {
    System.out.println("\nCreating connection to database: "+url);
    stmt = conn.createStatement();  // non-tx statement
    try {
        System.out.println("Starting top-level transaction.");
        userTransaction.begin();
        stmtx = conn.createStatement(); // will be a tx-statement
        ...
    }
}