io.scalecube.config.examples.DemoConfig Maven / Gradle / Ivy

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package io.scalecube.config.examples;

import io.scalecube.config.ConfigRegistry;
import io.scalecube.config.ConfigRegistrySettings;
import io.scalecube.config.StringConfigProperty;
import io.scalecube.config.audit.Slf4JConfigEventListener;
import io.scalecube.config.http.server.ConfigRegistryHttpServer;
import io.scalecube.config.mongo.MongoConfigConnector;
import io.scalecube.config.mongo.MongoConfigEventListener;
import io.scalecube.config.mongo.MongoConfigSource;
import io.scalecube.config.source.DirectoryConfigSource;

import java.nio.file.Path;
import java.util.function.Predicate;

public class DemoConfig {

  public static void main(String[] args) throws InterruptedException {

    // Mongo property source init
    String databaseName = "MongoConfigExample";
    String uri = "mongodb://localhost:27017/" + databaseName;
    String configSourceCollectionName = "MongoConfigSource";
    String auditLogCollectionName = "TestConfigurationAuditLog";
    MongoConfigConnector connector = MongoConfigConnector.builder().forUri(uri).build();
    MongoConfigSource mongoConfigSource = MongoConfigSource
        .withConnector(connector)
        .collectionName(configSourceCollectionName)
        .groups("group2", "group1", "root")
        .build();


    // Local resource cfg source init
    Predicate propsPredicate = path -> path.toString().endsWith(".props");
    String basePath = "config-examples/config";

    // Config registry init
    ConfigRegistry configRegistry = ConfigRegistry.create(
        ConfigRegistrySettings.builder()
            .addLastSource("ConfigDirectory", new DirectoryConfigSource(basePath, propsPredicate))
            .addLastSource("MongoConfig", mongoConfigSource)
            .addListener(new Slf4JConfigEventListener())
            .addListener(new MongoConfigEventListener(connector, auditLogCollectionName))
            .keepRecentConfigEvents(10)
            .reloadIntervalSec(3)
            .jmxEnabled(true)
            .jmxMBeanName("config.exporter:name=ConfigRegistry")
            .build());

    // Inject cfgReg into target component
    SomeComponent component = new SomeComponent(configRegistry);

    // Start REST HTTP Server
    ConfigRegistryHttpServer.create(configRegistry, 5050);
  }

  static class SomeComponent {

    private StringConfigProperty host;

    SomeComponent(ConfigRegistry cfgReg) {
      host = cfgReg.stringProperty("host");
      host.addCallback((oldVal, newVal) -> System.out.println("###Property changed: " + oldVal + "->" + newVal));
    }
  }
}