Spring Boot 2.7.5 and Elasticsearch

It has been a long time since I did anything with Elasticsearch and I wanted to give it a go again. So I spun up a Spring Boot application through the Spring Initializr and downloaded the latest and greatest Elasticsearch, version 8.x.x.

I then could not get it to work and found that Spring Data Elasticsearch 4.4.5 only supports Elasticsearch 7.17.6. So I downloaded that and did the following.

I added the following to $ES_HOME/config/elasticsearch.yml:

xpack.security.enabled: true
discovery.type: single-node

We are running Elasticsearch as a single node. That is why I set the discovery.type.

Then I started Elasticsearch and setup passwords. If you don’t enable security, Elasticsearch logs a message every time you send a request to it, stating you’re doing unsafe things.

I set the passwords by executing:

$ES_HOME/bin/elasticsearch-setup-passwords auto

Elasticsearch then spits out the passwords for the various accounts. As I am only playing around with Elasticsearch and this is no a production setting, I am using the elastic account in Spring Boot.

What I did next was configure Elasticsearch in Spring Boot:

@Configuration
public class ElasticConfiguration extends AbstractElasticsearchConfiguration {

    @Override
    public RestHighLevelClient elasticsearchClient() {
        final ClientConfiguration clientConfiguration = 
            ClientConfiguration.builder()
                .connectedTo("localhost:9200")
                .withBasicAuth("elastic","<password>")
                .build();

        return RestClients.create(clientConfiguration).rest();
    }
}

Of course you would want put the username and password in a configuration file and not code, but we are just horsing around here.

Then it is just a matter of making a repository and a storage object and you are good to go:

public interface UserRepository extends ElasticsearchRepository<User, String> {
}

The User object looks like this:

import org.springframework.data.annotation.Id;
import org.springframework.data.elasticsearch.annotations.Document;

@Document(indexName = "user")
public class User {
    @Id
    private String Id;
    private String username;
    private String department;
}

The dreadful missing JDK dialog on macOS

I’m not a fan of Eclipse or products derived from Eclipse. I think they’re slow, not very intuitive and the program state never seems to be up to date, but sometimes unfortunately there’s no alternative.

Sometimes I use Apache Directory Studio to edit my LDAP data. Today I installed Directory studio, but it wouldn’t start because it couldn’t find the JDK. I have unwrapped several JDK tar balls in my /opt directory, but Directory Studio doesn’t know that.

Of course I immediately started googling and a lot of people mentioned to put -vm <path to java> in the Contents/Eclipse/ApacheDirectoryStudio.ini inside the application’s folder in /Applications. This unfortunately didn’t work for me.

I started checking other files in the application folder and found Contents/Info.plist. Inside the array tag in that file at the bottom there’s a comment about using a particular Java version. Adding this to that array tag did the trick: <string>-vm</string><string>/somepath/java</string>

Just now I have installed Eclipse to see if it suffers from the same problem out of the box and it does. The solution is the same for Eclipse. Just add the vm information in the Info.plist in the Contents folder in the Eclipse application folder.