Harnessing Hibernate: Step-by-step Guide to Java Persistence
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It defines when database cleanup should be triggered and which cleanup strategy to apply. As always, you can use this annotation globally on a class level or on a method level. The latter takes precedence.
If automatic cleanup as described in Strategy based Cleanup does not suit your needs, CleanupUsingScripts might be your friend. You can use it to execute custom scripts to clean your database before or after the test. Just put this annotation either on the test itself or on the test class. As always the definition applied on the test method level takes precedence.
The JPA L2 cache can be a two-edged sword if configured or used improperly. Therefore it is crucial to test the corresponding behavior as early as possible. JPA Unit enables this by the usage of the CleanupCache annotation either on a test class, to apply the same behavior for all tests, or on a single test level to define whether and when the JPA L2 cache should be evicted.
Please note: The behavior of the second level can be configured in the persistence. If CleanupCache is used and the defined phase see below is not NONE , the second level cache will be evicted regardless the settings defined in the persistence. Example which evicts the JPA L2 cache before the execution of each test method implemented by a given class:.
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Bootstrapping of the data base schema, as well as the handling of its evolution over a period of time is a crucial topic. JPA Unit enables this by the usage of the Bootstrapping annotation. JPA Unit will execute this method very early in its bootstrapping process.
Java persistence with JPA and Hibernate, Part 1: Entities and relationships | JavaWorld
For tests, which use this feature, the JPA provider should be configured not to drop and create the data base schema on start, rather to verify it. For e. Hibernate this can be achieved by setting the hibernate. Depending on the used database, you will have to add a dependency for a database specific JPA-Unit plugin. Here an example of a persistence. All DBUnit specific settings can be configured by just making a dbunit.
Long and short property names are supported. For MongoDB , the jpa-unit-mongodb dependency needs to be added:. This is done using mongo-java-driver. Usage of an in-process, in-memory MongoDB implementations, like Fongo is not possible. To overcome this limitation, or made it at least less painful, one can use e.
These properties are also the only dependencies to a specific JPA provider implementation. In a simple case it must comply with the following example structure:. If indexes for more information on MongoDB indexes and types see MongoDB Indexes need to be included as well, the following structure applies:. Please note, that in this case the collection document consists of two subdocuments.
The first one - indexes is where the indexes are defined. Basically this is which fields of the collection are going to be indexed. The second one - data , where all documents, which belong to the collection under test, are defined. In both cases all the types defined by MongoDB are supported.
For Neo4j , the jpa-unit-neo4j dependency needs to be added:. JPA Unit needs to connect to a running Neo4j instance. This can be achieved by the use of e. A special note on Kundera: It still depends on a pretty old Neo4j 1. With other words, as long as Kundera is not updated to use a more recent version of Neo4j, the usage of this JPA provider will most probably be not possible.
Thanks to jgrapht , which is used internally for graph handling, following data set formats are supported:. APOC generated file does not include key elements definitions for label and labels data elements for edge , respectively node elements.
It also adds additional attributes label and labels to node and edge elements which are not defined by GraphML. The second one can be ignored - schema compliance is not enforced by JPA-Unit's neo4j extension. In all other cases it just uses the proxied producer. Cucumber is a BDD test framework. To be able to use JPA Unit with it, all you need in addition to cucumber dependencies is to add the following dependency to your Maven project :.
This dependency implements a Cucumber extension ObjectFactory which intercepts all cucumber feature glue methods to enable the usage of JPA Unit annotations.
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To avoid stale data between the executions of different scenarios or more general different tests, you should take care of the cleanup by yourself. This is the only difference to the regular behavior.
This cleanup can be achieved, e. The EntityManagerFactory lives for the duration of the scenario execution. Latter configuration might be a better choice for cucumber glue. However, since the usage of multiple runners is not possible, you'll have to start the CDI container manually. Here an example with Deltaspike:. Concordion is a BDD test framework. To be able to use JPA Unit with it, all you need in addition to concordion dependencies is to add the following dependency to your Maven project :.
This runner hooks into concordion implementation and intercepts all fixture methods referenced from corresponding specifications, thus enables the usage of JPA Unit annotations on fixture methods. Latter configuration might be a better choice for concordion fixtures. Here's an excerpt demonstrating CDI usage:. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together.
Sign up. JUnit extension to test javax. Java Other. Java Branch: master New pull request. Find file. Download ZIP. Sign in Sign up. Launching GitHub Desktop Go back. So your implementation would consider them different. In fact, your test harness only works, because you first persist the entity, providing it with an id, an then you detach and merge it later on. At that time, id generation will no longer be a issue and your implementation will consider them equal.
There is no such thing as a direct merge. You can find all the tests in my High-Performance Java Persistence GitHub repository, so feel free to provide a test case that proves this implementation does not work. What do you think of the default implementation provided by Spring Data Jaa in org. Can you please explain how will this break consistency?
When it is persisted, hashcode will update.