We now allow partial update of domain types via PartialUpdate. The according expiration times and secondary index structures are updated accordingly.
In some cases it is not necessary to load and rewrite the entire entity just to set a new value within it. A session timestamp for last active time might be such a scenario where you just want to alter one property.
`PartialUpdate` allows to define `set`, `delete` actions on existing objects while taking care of updating potential expiration times of the entity itself as well as index structures.
.Sample Partial Update
====
[source,java]
----
PartialUpdate<Person> update = new PartialUpdate<Person>("e2c7dcee", Person.class)
.set("firstname", "mat") <1>
.set("address.city", "emond's field") <2>
.del("age"); <3>
template.update(update);
update = new PartialUpdate<Person>("e2c7dcee", Person.class)
.set("address", new Address("caemlyn", "andor")) <4>
.set("attributes", singletonMap("eye-color", "grey")); <5>
template.update(update);
update = new PartialUpdate<Person>("e2c7dcee", Person.class)
.refreshTtl(true); <6>
.set("expiration", 1000);
template.update(update);
----
<1> Set the simple property _firstname_ to _mat_
<2> Set the simple property _address.city_ to _emond's field_ without having to pass in the entire object. This does not work when a custom conversion is registered.
<3> Remove the property _age_.
<4> Set complex property _address_.
<5> Set a map/collection of values removes the previously existing map/collection and replaces the values with the given ones.
<6> Automatically update the server expiration time when altering time to live.
====
NOTE: Updating complex objects as well as map/collection structures requires further interaction with Redis to determine existing values which means that it might turn out that rewriting the entire entity might be faster.
Original pull request: #191.
Spring Data Redis
The primary goal of the Spring Data project is to make it easier to build Spring-powered applications that use new data access technologies such as non-relational databases, map-reduce frameworks, and cloud based data services. This modules provides integration with the [Redis] (http://redis.io/) store.
Docs
You can find out more details from the user documentation or by browsing the javadocs.
Examples
For examples on using the Spring Data Key Value, see the dedicated project, also available on GitHub
Artifacts
- Maven:
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-redis</artifactId>
<version>${version}</version>
</dependency>
<!-- used for nightly builds -->
<repository>
<id>spring-maven-snapshot</id>
<snapshots><enabled>true</enabled></snapshots>
<name>Springframework Maven SNAPSHOT Repository</name>
<url>http://repo.spring.io/libs-release</url>
</repository>
<!-- used for milestone/rc releases -->
<repository>
<id>spring-maven-milestone</id>
<name>Springframework Maven Milestone Repository</name>
<url>http://repo.spring.io/libs-milestone</url>
</repository>
- Gradle:
repositories {
maven { url "http://repo.spring.io/libs-milestone" }
maven { url "http://repo.spring.io/libs-snapshot" }
}
// used for nightly builds
dependencies {
compile "org.springframework.data:spring-data-redis:${version}"
}
Usage (for the impatient)
- Configure the Redis connector to use (here jedis):
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
<bean id="jedisFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory"/>
<bean id="redisTemplate" class="org.springframework.data.redis.core.RedisTemplate"
p:connection-factory="jedisFactory"/>
</beans>
- Use
RedisTemplateto interact with the Redis store:
String random = template.randomKey();
template.set(random, new Person("John", "Smith"));
- Use Redis 'views' to execute specific operations based on the underlying Redis type:
ListOperations<String, Person> listOps = template.listOps();
listOps.rightPush(random, new Person("Jane", "Smith"));
List<Person> peopleOnSecondFloor = listOps.range("users:floor:2", 0, -1);
Building
Spring Data Redis uses Maven as its build system.
Running the tests requires you to have a RedisServer running at its default port. Using the -D runLongTests=true option executes additional Pub/Sub test.
mvn clean install
You can alternatively use the provided Makefile which runs the build plus downloads and spins up the following environment:
- 1 Single Node
- HA Redis (1 Master, 2 Slaves, 3 Sentinels).
- Redis Cluster (3 Masters, 1 Slave)
make test
Contributing
Here are some ways for you to get involved in the community:
- Get involved with the Spring community on the Stackoverflow. Please help out on the spring-data-redis tag by responding to questions and joining the debate.
- Create JIRA tickets for bugs and new features and comment and vote on the ones that you are interested in.
- Watch for upcoming articles on Spring by subscribing to spring.io.
Github is for social coding: if you want to write code, we encourage contributions through pull requests from forks of this repository. If you want to contribute code this way, read the Spring Framework [contributor guidelines] (https://github.com/spring-projects/spring-framework/blob/master/CONTRIBUTING.md).
Staying in touch
Follow the project team (@SpringData) on Twitter. In-depth articles can be found at the Spring team blog, and releases are announced via our news feed.