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59

Database Replication and Clustering

, the same database is managed on multiple machines (nodes), possibly in different geographic locations ... master-slave replication, the master node manages the main (master) database, which supports Read / Write operations. The other (slave) nodes in the cluster manage identical copies of the same database
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Database Doctor

database file Checks a given ObjectDB database file, verifies that it is healthy and valid ... of a corrupted ObjectDB database file Repairs a corrupted ObjectDB database file by creating a new fresh database file and then copying all the recoverable data in the corrupted database file
56

Database Transaction Replayer

can apply recorded database operations on a matching database backup (if available). This ability is useful for two different purposes: It enables recovery from a database failure by replaying ... & Recording Files When recording is enabled, ObjectDB maintains for every database file a recording
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Database Server

ObjectDB Server is a tool that manages ObjectDB databases in a separate dedicated process, making these databases accessible to client applications in other processes including ones on other remote ... are: The ability to access and use databases from different processes simultaneously. The ability to access
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Chapter 5 - Database Tools and Utilities

Describes the ObjectDB object database tools - the Explorer, the Server, the Enhancer, the Doctor and the Replayer.
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[ODB1] Chapter 9 - ObjectDB Explorer

database objects visually, navigate among them and execute queries is very valuable during development ... information about the database and the bottom sub window displays a list of root objects that the database ... visual database tools. Every row in the table represents a single object, every column represents
4

[ODB1] Chapter 5 - JDO Connections

storing, retrieving, updating and deleting database objects, are provided in the next chapter (Chapter ... Lock Management ObjectDB manages an automatic lock mechanism in order to prevent a database object ... the database a READ lock on that object is obtained by the PersistenceManager. On every attempt to modify
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[ODB1] Chapter 2 - A Quick Tour

instances. ObjectDB, as a pure object database, can simply store a memory data structure in the database ... method (line 25). An object bound to the database during an active transaction, is expected to be stored physically in the database when the transaction is committed (line 37). Note: Memory objects
2

[ODB1] Chapter 1 - About ObjectDB

ObjectDB for Java/JDO is a powerful Object Database Management System (ODBMS) written entirely in ... of them. ObjectDB is an Object Database Developing object oriented applications with ObjectDB is easier and much more effective because the content of the database is application objects. Whereas, working
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[ODB1] Chapter 3 - Persistent Classes

. Instances of these classes that represent objects in the database are called persistent objects or persistent instances. Objects that do not represent anything in the database (including instances ... Fields and Types Storing a persistent object in the database does not store methods and code

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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