03832c36a4
Reorder constructor filtering with the goal to delay/avoid potentially expensive PersistenceConstructor creation with parameter lookup as much as possible.
The lookup is (in a default setup) only done once per domain type, but depending on the number of entities to inspect the change can help save some cycles for larger domains.
Before:
Benchmark Mode Cnt Score Error Units
EntityMetadataBenchmark.alwaysNew thrpt 10 224318,163 ± 42542,453 ops/s
After:
Benchmark Mode Cnt Score Error Units
EtityMetadataBenchmark.alwaysNew thrpt 10 420053,505 ± 9288,093 ops/s
public class DomainType {
private String id;
private @Id String theId;
private String firstname, lastname;
private Integer age;
public DomainType(String id, String theId, String firstname, String lastname, Integer age) {
this.id = id;
this.theId = theId;
this.firstname = firstname;
this.lastname = lastname;
this.age = age;
}
@PersistenceConstructor
public DomainType(String firstname, String lastname) {
this.firstname = firstname;
this.lastname = lastname;
}
}
Original pull request: #440.
= Spring Data Commons image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-commons%2Fmaster&subject=Build[link=https://jenkins.spring.io/view/SpringData/job/spring-data-commons/] https://gitter.im/spring-projects/spring-data[image:https://badges.gitter.im/spring-projects/spring-data.svg[Gitter]]
https://projects.spring.io/spring-data/[Spring Data Commons] is part of the umbrella Spring Data project that provides shared infrastructure across the Spring Data projects. It contains technology neutral repository interfaces as well as a metadata model for persisting Java classes.
Our primary goals are:
* Powerful Repository and custom object-mapping abstractions
* Support for cross-store persistence
* Dynamic query generation from query method names
* Implementation domain base classes providing basic properties
* Support for transparent auditing (created, last changed)
* Possibility to integrate custom repository code
* Easy Spring integration with custom namespace
== Code of Conduct
This project is governed by the link:CODE_OF_CONDUCT.adoc[Spring Code of Conduct]. By participating, you are expected to uphold this code of conduct. Please report unacceptable behavior to spring-code-of-conduct@pivotal.io.
== Getting Started
=== Maven configuration
Add the Maven dependency:
[source,xml]
----
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-commons</artifactId>
<version>${version}.RELEASE</version>
</dependency>
----
If you'd rather like the latest snapshots of the upcoming major version, use our Maven snapshot repository and declare the appropriate dependency version.
[source,xml]
----
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-commons</artifactId>
<version>${version}.BUILD-SNAPSHOT</version>
</dependency>
<repository>
<id>spring-libs-snapshot</id>
<name>Spring Snapshot Repository</name>
<url>https://repo.spring.io/libs-snapshot</url>
</repository>
----
== Getting Help
Having trouble with Spring Data? We’d love to help!
* Check the
https://docs.spring.io/spring-data/commons/docs/current/reference/html/[reference documentation], and https://docs.spring.io/spring-data/commons/docs/current/api/[Javadocs].
* Learn the Spring basics – Spring Data builds on Spring Framework, check the https://spring.io[spring.io] web-site for a wealth of reference documentation.
If you are just starting out with Spring, try one of the https://spring.io/guides[guides].
* If you are upgrading, check out the https://docs.spring.io/spring-data/commons/docs/current/changelog.txt[changelog] for "`new and noteworthy`" features.
* Ask a question - we monitor https://stackoverflow.com[stackoverflow.com] for questions tagged with https://stackoverflow.com/tags/spring-data[`spring-data`].
You can also chat with the community on https://gitter.im/spring-projects/spring-data[Gitter].
* Report bugs with Spring Data Commons at https://jira.spring.io/browse/DATACMNS[jira.spring.io/browse/DATACMNS].
== Reporting Issues
Spring Data uses JIRA as issue tracking system to record bugs and
feature requests. If you want to raise an issue, please follow the
recommendations below:
* Before you log a bug, please search the
https://jira.spring.io/browse/DATACMNS[issue tracker] to see if someone has already reported the problem.
* If the issue doesn’t already exist, https://jira.spring.io/browse/DATACMNS[create a new issue].
* Please provide as much information as possible with the issue report, we like to know the version of Spring Data that you are using and JVM
version.
* If you need to paste code, or include a stack trace use JIRA `{code}…{code}` escapes before and after your text.
* If possible try to create a test-case or project that replicates the issue. Attach a link to your code or a compressed file containing your code.
== Building from Source
You don’t need to build from source to use Spring Data (binaries in https://repo.spring.io[repo.spring.io]), but if you want to try out the latest and greatest, Spring Data can be easily built with the https://github.com/takari/maven-wrapper[maven wrapper].
You also need JDK 1.8.
[source,bash]
----
$ ./mvnw clean install
----
If you want to build with the regular `mvn` command, you will need https://maven.apache.org/run-maven/index.html[Maven v3.5.0 or above].
_Also see link:CONTRIBUTING.adoc[CONTRIBUTING.adoc] if you wish to submit pull requests, and in particular please sign the https://cla.pivotal.io/sign/spring[Contributor’s Agreement] before your first non-trivial change._
=== Building reference documentation
Building the documentation builds also the project without running tests.
[source,bash]
----
$ ./mvnw clean install -Pdistribute
----
The generated documentation is available from `target/site/reference/html/index.html`.
== License
Spring Data Commons is Open Source software released under the https://www.apache.org/licenses/LICENSE-2.0.html[Apache 2.0 license].