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EntityManager.refresh takes a long time

(Level.INFO, "begin select for person " + new Date().toString());                TypedQuery<Person ... .INFO, "begin refresh for person = " +             person + "  "+ new Date().toString());         em ... + "  "+ new Date().toString());     } INFO: begin select for person Thu Aug 08 19:39:45 GMT+04:00
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Step 3: Add a Main Class

: em.getTransaction().begin(); for (int i = 0; i < 1000; i++) { Point p
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Step 4: Add a Servlet Class

.getTransaction().begin(); em.persist(new Guest(name)); em
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Step 3: Define a Spring DAO Component

every operation that modifies the database (such as persist) by transaction begin and commit. The next step is adding a Controller Class.
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Step 4: Add a Servlet Class

"); if (name != null) { em.getTransaction().begin(); em.persist(new
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Step 3: Define an EJB Session Bean

transaction begin and commit. The next step is adding a Servlet Class that will serve as the application controller.
1

Step 3: Define a Spring DAO Component

that modifies the database (such as persist) by transaction begin and commit. The next step is adding a Controller Class.
0

[ODB1] Chapter 9 - ObjectDB Explorer

. After "File | Save" and "File | Discard Changes", the Explorer automatically begins a new
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[ODB1] Chapter 4 - JDO Metadata

to its value at the beginning of the transaction. default-fetch-group (true | false) The default-fetch
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javax.jdo.Transaction

may only be used with bean-managed transaction semantics. Since: JDO 1.0 void begin() Begin a transaction. Begin a transaction. The type of transaction is determined by the setting of the Optimistic ... to their values as of the beginning of the transaction, and the instances revert to transient

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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