ObjectDB Database Search

Hi, I am using JDO access to the database with the persistence defined in package.jdo XML metadata files. In those metadata files I have few persistence-capable classes which had extents in ObjectDB ... and own OID) in those few peristence-capable ones. Example of JDO metadata:        

is with Criteria Language. This code: In inExpression = cb. in (root.get(Computer_.employeeEntity ... by ObjectDB. They are listed in the issue tracking system , and unfortunately subqueries ... Support Hi, I am seeing the same issue of " IN (:bindVar)" generates a syntax error in version 2.5.3

Hello, I am learning ObjectDB and i noticed that the queries that are executed in   ObjectDB Explorer are faster (about 5 ms) than queries in my project (~400 ms). Here is my JPQL ... are executed in the Explorer in a special lazy mode, which is faster in returning the results

on Linux. Here is the structure (JDO metadata) of 3 classes which I am storing as values in a HashMap of another entity in the DB.                   ... you can see the classes are not embedded, so they have their own extent and IDs in the DB

. There are three entities in two OSGi-Bundles and we execute importRequirements() in RequirementServiceImpl ... .RequirementImportServiceImpl.addReq(RequirementImportServiceImpl.java:146) btc_es BTC EmbeddedSystems In another use case ... may indicate an attempt to access a new entity object that was persisted in one transaction from

I'm trying to switch an application that worked fine in Hibernate to ObjectDB and am having issues ... Type {     A,B,C } that is stored in an @Enumerated member variable private Type type ... in the following JPA Named Query @NamedQuery(name = "TestQuery",       

at some point in the past, but may have been a victim of an objectDB upgrade. dhosek Don Hosek A possible reason could be a partial enhancement. ObjectDB can populate fields in both enhancement mode and reflection mode but mixing modes is not supported and if some classes in the hierarchy

plz can u give or help me how to create in memory database in objectdb   with example yadavanil anil yadav See answer in this forum thread  (also use that other thread for further discussion). support Support

Error in reading Enum in JPA - Failed to read using reflection

(); These methods can be invoked in a single expression with getResultList since the setter methods in Query and TypedQuery support method chaining (by returning the query object ... of other EntityManager instances). JPA implementations can easily make uncommitted changes visible in simple JPA

. Having an SQL-like syntax in JPA queries is an important advantage because SQL is a very powerful query ... and easier to use in Java. JPQL Query Structure As with SQL, a JPQL SELECT query also consists of up to 6 clauses in the following format: SELECT ... FROM ... [WHERE ...] [GROUP BY ... [HAVING

. the broader scope of this cache makes it useful in applications that use many short term  EntityManager instances.  In addition to the EntityManager 's L1 cache and the EntityManagerFactory 's L2 ... client machines. Setting the Shared Cache The shared (L2) cache is configured in three scopes: Globally

The WHERE clause adds filtering capabilities to the FROM-SELECT structure. It is essential in any ... over all the Country objects in the database using the c range variable. Before passing these Country ... to function as a filter. The boolean expression in the WHERE clause, which is also known as

connections during their lifetime. For instance, in a web application it is common to establish a separate ... a persistence unit name. To use ObjectDB embedded directly in your application (embedded mode ... ; "objectdb:my-db.tmp" ). To use client server mode, a URL in the format objectdb://host:port/path

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 machines. The main benefits in running an ObjectDB server and using the client-server mode

, the same database is managed on multiple machines (nodes), possibly in different geographic locations. This could help in achieving high availability, fault tolerance and prompt disaster recovery. In ... / Write operations. The other (slave) nodes in the cluster manage identical copies of the same database

is optional when using ObjectDB, but required by JPA. persistence.xml Persistence units are defined in a persistence.xml file, which has to be located in the META-INF directory in the classpath ... to instantiate an EntityManagerFactory in JPA (as explained in the JPA Overview section) requires

for entity objects with no primary key fields defined (as explained in the previous section ). The same ... , as explained in the previous section . The Identity Strategy The IDENTITY strategy is very similar ... in one or more fields in one or more classes. The @SequenceGenerator annotation is used to define

The configuration element supports renaming packages, classes and fields in ObjectDB databases as a complementary operation to renaming or moving these elements in the IDE during source code refactoring. Only these schema changes are specified in the configuration file. As explained in chapter 2

types  (which are referred to as managed types)  in the persistent object model ... classes: Set allEmbeddableTypes = metamodel. getEmbeddables (); If managed classes are not listed in ... . This includes all the types whose instances are already stored in the database. Three additional

: ... ... ... ... ... ... ... Each one of these seven configuration elements is explained in a separate section: This page explains how ObjectDB configuration works in general. The Configuration Path By default ... ) is derived from the location of the objectdb.jar file. It is defined as the path to the directory in

while the database is offline (i.e. when it is not open in an ObjectDB server and not in use by any application), since an ObjectDB database is stored as an ordinary file in the file system.  ObjectDB supports also online backup, for backing up an ObjectDB database while it is in use. This is useful

Detached entity objects are objects in a special state in which they are not managed by any EntityManager but still represent objects in the database. Compared to managed entity objects, detached objects are limited in functionality: Many JPA methods do not accept detached objects (e.g. lock

organization in one building, and in addition also covers installation of ObjectDB on: Home computers and laptops of employees in that workplace. Servers that are leased or rented from third party web ... applications that use ObjectDB are developed and managed only by employees in that workplace. Purchase

Modifying existing entity objects that are stored in the database is based on transparent ... Once an entity object is retrieved from the database (no matter which way) it can simply be modified in memory ... (); The entity object is physically updated in the database when the transaction is committed

include an ORDER BY clause produces results in an undefined and non-deterministic order. ORDER BY ... expressions in the SELECT clause are allowed in the ORDER BY clause. The following query, for example ... expressions can be used in the ORDER BY clause. Some JPA implementations are more restrictive. Path

In JPA a database connection is represented by the EntityManager interface. Therefore, in order ... to get an EntityManager instance. JPA requires the definition of a persistence unit in an XML file in order ... persistence unit in an XML file or you can simply provide the file path of the ObjectDB database

method or implicitly as a result of a cascade operation. Explicit Remove In order to delete an object from the database it has to first be retrieved (no matter which way) and then in an active ... that are contained in the entity object are also deleted. If the transaction is rolled back and not

- for use when exactly one result object is expected. Query.getResultList - for general use in any ... - for general use in any other case. In addition, the Query interface defines a method for running ... Query Execution (with getResultList) The following query retrieves all the Country objects in

Client-Server mode (TCP/IP). Secure Client-Server mode ( SSL over TCP/IP ). In process embedded database ... Database with built in support for  JPA 2 . Java Persistence API (JPA) Most features of JPA 2 are supported. Support for remaining features is in progress - see issue tracking (requires login

: The path attribute specifies a directory in which the temporary files are generated. The $temp prefix ... in seconds, where 0 indicates never (no inactivity timeout). The inactivity timeout (when 0 ... in embedded mode. Specifying an inactivity timeout may solve firewall related issues. In general

is affected also by other elements in the configuration file, particularly the and the configuration elements ... . If another port is specified it also has to be specified by clients in the URL connection string when connecting to the database (as explained in the JPA Overview section in chapter 3). The max attribute

rather than embedding literals dynamically into the query string and results in more efficient queries. @NamedQuery ... whose name is  "Country.findAll" that retrieves all the  Country objects in the database ... to the same entity class requires wrapping them in a @NamedQueries annotation, as follows: @Entity

To be able to store Point objects in the database using JPA we need to define an entity class ... that is marked (annotated) as having the ability to represent objects in the database. Conceptually ... Entity Class The following Point class, which represents points in the plane, is marked as an entity

The JPA Criteria API interfaces in this group are used for setting the SELECT and ORDER BY clauses ... clause in a criteria query is represented by Selection : Because Selection  is a super interface ... of Selection : See the SELECT in Criteria Queries section for more details and examples. ORDER BY

The interfaces in this group are in use for setting a criteria query FROM clause. Criteria Query Variables The FROM clause   in JPA queries (as in SQL) defines the query variables. Query variables are represented in criteria queries by descendant interfaces of the From interface: Range

There seems to be a bug in the JDOQL processor in recent versions of ObjectDB. I've uploaded a "laptop" example to demonstrate the problem. The query in Test1.main should return "ThinkMachine MAX SX 20", but it returns incorrect "Media Central Media 555". Earlier versions (at least up to 2.5.4

ObjectDB can record its internal engine operations in special binary recording (journal) files. Recording is enabled by default and can be disabled in the configuration . The ObjectDB Replayer tool ... default, the recording directory is generated in the directory that contains the database file

fresh database file and then copying all the recoverable data in the corrupted database file ... of the Operating System, Java or ObjectDB). Copying a database file while it is open and in use ... over FTP in ASCII mode (BINARY mode should be used). Deleting an ObjectDB database recovery file or

redirection to the controller path: Assuming that Tomcat 6.0 is installed as a server in your NetBeans ... F6 ): You can select the server in the Run category of the project properties window (right click ... ; jetty:run in the Goals field and click  OK . Open your browser at http://localhost:8080

tutorial demonstrates how to use ObjectDB and JPA in a console application: Quick Start with JPA Tutorial Only basic Java experience is required in order to follow this tutorial. Web Application Tutorials The web application tutorials demonstrate how to use JPA in web applications. Understanding

To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New Entity Class] dialog box, e.g. by right clicking the project node ( in the [Projects] window ... - use exactly that case sensitive package name. Click Next to create the new entity class. In

To store objects in an ObjectDB database using JPA we need to define an entity class: Right click the project node ( in the [Package Explorer] window), select  New Source Folder ... right clicking the new source directory node ( in the [Package Explorer] window) and selecting 

To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New Entity Class] dialog box, e.g. by right clicking the project node ( in the [Projects] window ... entity class. In the [Provider and Database] step click Finish to generate a default persistence.xml

To store objects in an ObjectDB database using JPA we need to define an entity class: Open the [New Java Class] dialog box, e.g. by right clicking the project node ( in the [Package Explorer] window ... objects in the database was created in the project (under Java Resources: src guest). Use copy

another xml configuration file. Open the  web.xml file (under src/main/webapp/WEB-INF) in a text ... and then moving to the Source tab in the editor window). Use copy and paste to replace the default content ... to the Spring dispatcher servlet. Additional spring configuration is set in another XML file

another xml configuration file. Open the web.xml file (under Web Pages WEB-INF) in a text editor (by right clicking and selecting Edit or by double click and then moving to the XML tab in the editor window ... configuration is set in another XML file (whose name is derived from the name of the Spring dispatcher

redirection to the  controller path: If Tomcat 6.0 is installed as a server in your Eclipse - you can run the application now by right clicking the project node ( in the [Project Explorer] window ... ; jetty:run in the Goals field and click Run . Open your browser at http://localhost:8080/Guestbook

Queries against the database are represented in BIRT as data sets. To create the data set: Open the [New Data Set] dialog box by right clicking the Data Sets node in the [Data Explorer] window and selecting New Data Set . Select the data source that was created in the previous step (e.g. ObjectDB

In this step we will add a servlet to manage guestbook web requests: Open the [Create Servlet] dialog box by right clicking the guest package node ( in the [Package Explorer] window), selecting ... connection) is constructed. If a new guest has registered (using a JSP form that is shown in