Spring-boot gets an error when creating custom RestTemplate

Question

I have a sendGetREST method to send some URL endpoint and get the response:

@Component
public class HttpURLCommand {
    private static Logger logger = Logger.getLogger(HttpURLCommand.class);

public String sendGetREST(String soapUrl, Object[] parameters) throws IOException{
        final String SOAP_URL = MessageFormat.format(soapUrl, parameters);
        RestTemplate restTemplate = new RestTemplate();
        ResponseEntity<String> response = restTemplate.getForEntity(SOAP_URL, String.class);

    logger.info("status code is: "+response.getStatusCode());
    if(response.getStatusCode().equals(HttpStatus.OK)){
        logger.info("send success");
        return response.getBody();
    }
    else {
        logger.info("send failed");
        return null;
    }

  }
}

Which is working well. However, in order to make the timeout time customizable, I have this HTTPConfiguration from this tutorial:

@Configuration
public class HTTPConfiguration {

@Bean
public RestTemplate restTemplate() {
    return new RestTemplate(clientHttpRequestFactory());
}

private ClientHttpRequestFactory clientHttpRequestFactory() {
    HttpComponentsClientHttpRequestFactory factory = new HttpComponentsClientHttpRequestFactory();
    factory.setReadTimeout(60000);
    factory.setConnectTimeout(60000);
    return factory;
   }
}

So the class will be calling restTemplate like this:

@Component
 public class HttpURLCommand {
    private static Logger logger = Logger.getLogger(HttpURLCommand.class);
    @Autowired
    RestTemplate restTemplate;

public String sendGetREST(String soapUrl, Object[] parameters) throws IOException{
        final String SOAP_URL = MessageFormat.format(soapUrl, parameters);
        ResponseEntity<String> response = restTemplate.getForEntity(SOAP_URL, String.class);

    logger.info("status code is: "+response.getStatusCode());
    if(response.getStatusCode().equals(HttpStatus.OK)){
        logger.info("send success");
        return response.getBody();
    }
    else {
        logger.info("send failed");
        return null;
    }

  }
}

But unfortunately return this following error when builds the spring-boot app:

Caused by: java.lang.NoClassDefFoundError: org/apache/http/protocol/HttpContext
at com.xl.MbbI.config.HTTPConfiguration.clientHttpRequestFactory(HTTPConfiguration.java:25) ~[classes/:na]
at com.xl.MbbI.config.HTTPConfiguration.restTemplate(HTTPConfiguration.java:21) ~[classes/:na]
at com.xl.MbbI.config.HTTPConfiguration$$EnhancerBySpringCGLIB$$191f99f.CGLIB$restTemplate$0(<generated>) ~[na:na]
at com.xl.MbbI.config.HTTPConfiguration$$EnhancerBySpringCGLIB$$191f99f$$FastClassBySpringCGLIB$$8330ce57.invoke(<generated>) ~[na:na]
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-4.3.0.RC2.jar:4.3.0.RC2]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:356) ~[spring-context-4.3.0.RC2.jar:4.3.0.RC2]
at com.xl.MbbI.config.HTTPConfiguration$$EnhancerBySpringCGLIB$$191f99f.restTemplate(<generated>) ~[na:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_60]
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[na:1.7.0_60]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[na:1.7.0_60]
at java.lang.reflect.Method.invoke(Unknown Source) ~[na:1.7.0_60]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) ~[spring-beans-4.3.0.RC2.jar:4.3.0.RC2]
... 24 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.apache.http.protocol.HttpContext
at java.net.URLClassLoader$1.run(Unknown Source) ~[na:1.7.0_60]
at java.net.URLClassLoader$1.run(Unknown Source) ~[na:1.7.0_60]
at java.security.AccessController.doPrivileged(Native Method) ~[na:1.7.0_60]
at java.net.URLClassLoader.findClass(Unknown Source) ~[na:1.7.0_60]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.7.0_60]
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) ~[na:1.7.0_60]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[na:1.7.0_60]
... 36 common frames omitted

FYI the error is much more than displayed above.

The first line is something like:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'restTemplate' defined in class path resource .....

score 31 · Accepted Answer · answered Aug 05 '16 at 00:25

31

Caused by: java.lang.NoClassDefFoundError: org/apache/http/protocol/HttpContext

The error shows that there was a problem with your classpath, it could be because there is no class or.apache.http.protocol.HttpContext in your classpath. This class is often used by Spring RestTemplate. Normally we can find this class in the Apache httpclient library. You should check again your dependencies. If you can not find it, you can consider to add below dependency (if you use Maven)

 <dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.2</version>
</dependency>

answered Aug 05 '16 at 00:25

NangSaigon

1,253
12
14

1

It worked! I don't get it why it runs well on the first place (without custom timeout)? – Shofwan Aug 05 '16 at 13:33
umm .. . . can someone explain it to me please? – Shofwan Aug 06 '16 at 04:18
By default, the RestTemplate relies on standard JDK facilities to establish HTTP connections. So, the first place worked well. However, in the second, you did "tell" the RestTemplate to use ApacheHttpComponent to communicate with the web service. Therefore, it threw exception because some classes not found. Here is your declaration in the second: @Bean public RestTemplate restTemplate() { return new RestTemplate(clientHttpRequestFactory()); }. In the first, you use default httpcl – NangSaigon Aug 06 '16 at 05:03
Here is the reference from the Spring website, it also mentions about the default http client. http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/web/client/RestTemplate.html – NangSaigon Aug 06 '16 at 05:04
Reference to mvn repo for latest version https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient/4.5.4. – DaddyMoe Jan 11 '18 at 17:18
1

After an hour searching for a solution, this is the only thing that worked. Thanks! – AjCodez Sep 10 '18 at 18:22

Spring-boot gets an error when creating custom RestTemplate

1 Answers1