Apache Commons Exec

Giriş

Bir shell script veya başar bir uygulamayı çalıştırıp çıktısını okumak için kullanılır

DefaultExecutor harici uygulamayı çalıştırır

PumpStreamHandler çıktıyı toparlar

Gradle

Şu satırı dahil ederiz

implementation group: 'org.apache.commons', name: 'commons-exec', version: '1.3'

HttpComponents HttpClientBuilder Sınıfı

Giriş
Şu satırı dahil ederiz.

import org.apache.http.impl.client.HttpClientBuilder;

setDefaultRequestConfig metodu

Tüm client için timeout ayarları yapılabilir.

Örnek

Şöyle yaparız

import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;

HttpGet request = new HttpGet("https://httpbin.org/get");

// 5 seconds timeout
RequestConfig requestConfig = RequestConfig.custom()
  .setConnectionRequestTimeout(5_000)
  .setConnectTimeout(5_000)
  .setSocketTimeout(5_000)
  .build();

try (CloseableHttpClient httpClient = HttpClientBuilder.create()
  .setDefaultRequestConfig(requestConfig)
  .build();
   CloseableHttpResponse response = httpClient.execute(request)) {
  ...
}

setUserAgent metodu

Şöyle yaparız.

CloseableHttpClient httpClient = HttpClients.custom()
  .setUserAgent(HTTP_USER_AGENT).
  .build();
HttpGet request = new HttpGet(url);
HttpResponse response = httpClient.execute(request);

setSSLSocketFactory metodu

Örnek

Şöyle yaparız

HttpClientBuilder builder = HttpClients.custom();
javax.net.ssl.SSLContext sslContext = SSLContext.getInstance("TLSv1.1");
javax.net.ssl.KeyManager[] clientKeyManagers = ...;
javax.net.ssl.TrustManager[] clientTrustManagers = ...;
sslContext.init(clientKeyManagers, clientTrustManagers, new SecureRandom());

builder.setSSLSocketFactory(
  new org.apache.http.conn.ssl.SSLConnectionSocketFactory(sslContext,
    SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER)
);
CloseableHttpClient client = builder.build();




Failable Sınıfı - Lambda İçinde Exception İçindir

Giriş

Şu satırı dahil ederiz

import org.apache.commons.lang3.function.Failable;

Örnek

Şöyle yaparız

Stream<String> stream = Stream.of("...", "...", "...");
Failable.stream(stream)
  //throws a ClassNotFoundException wrapped in an UndeclaredThrowableException at runtime. 
  .map(Class::forName)  
  .forEach(System.out::println);

Camel Choice ve When - Content Based Routing İçindir

Giriş

Açıklaması şöyle

Apache Camel contains a powerful feature called content-based routers. This allows you to process the message differently relying on the content.

They are quite similar to the if/else statement in Java. Regardless, in Camel, the equivalent words are when and otherwise.

Örnek

Şöyle yaparız

import org.apache.camel.builder.RouteBuilder;
import org.springframework.stereotype.Component;

@Component
public class ChoiceWhenRoute extends RouteBuilder {
  @Override
  public void configure() throws Exception {

    from("direct:startWhenChoiceRoute")
      .routeId("direct:startWhenChoiceRoute")
      .log( "${body}")
      .choice()
      .when(body().isNull())
      .log("Message body is empty.")
      .log("${body}")
      .end();
  }
}

Test için şöyle yaparız

import org.apache.camel.CamelContext;
import org.apache.camel.Exchange;
import org.apache.camel.ProducerTemplate;
import org.apache.camel.builder.ExchangeBuilder;

@RestController
public class Controler {

  @Autowired
  private ProducerTemplate producerTemplate;

  @Autowired
  private CamelContext camelContext;

  @GetMapping
  public void function() {
    Exchange requestExchange = ExchangeBuilder
      .anExchange(camelContext)
      .build();

    producerTemplate
      .send("direct:startWhenChoiceRoute",requestExchange);

  }
}

Jena - Semantic Web

Gradle

Şu satırı dahil ederiz

implementation "org.apache.jena:apache-jena-libs:4.0.0"

Örnek

Şöyle yaparız

OntModel model = ModelFactory.createOntologyModel("http://www.w3.org/2000/01/rdf-schema#");
RDFParser.source("https://schema.org/version/latest/schemaorg-current-https.jsonld")
  .parse(model);