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#BAEL-1025 (#2445)

This commit is contained in:
Tian Baoqiang 2017-08-21 15:58:37 -05:00 committed by Grzegorz Piwowarek
parent 706b3d6c67
commit 802c0b09e0
7 changed files with 305 additions and 0 deletions
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22
ratpack/pom.xml
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@ -40,16 +40,38 @@
<artifactId>ratpack-hikari</artifactId>
<version>${ratpack.version}</version>
</dependency>
<dependency>
<groupId>io.ratpack</groupId>
<artifactId>ratpack-hystrix</artifactId>
<version>${ratpack.version}</version>
</dependency>
<dependency>
<groupId>io.ratpack</groupId>
<artifactId>ratpack-rx</artifactId>
<version>${ratpack.version}</version>
</dependency>
<dependency>
<groupId>io.ratpack</groupId>
<artifactId>ratpack-test</artifactId>
<version>${ratpack.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<version>1.4.193</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.3</version>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpcore</artifactId>
<version>4.4.6</version>
</dependency>
</dependencies>
<build>

54
ratpack/src/main/java/com/baeldung/hystrix/HystrixAsyncHttpCommand.java Normal file
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@ -0,0 +1,54 @@
package com.baeldung.hystrix;
import com.netflix.hystrix.HystrixCommand;
import com.netflix.hystrix.HystrixCommandGroupKey;
import com.netflix.hystrix.HystrixCommandProperties;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicHeader;
import org.apache.http.util.EntityUtils;
import java.net.URI;
import java.util.Collections;
/**
* @author aiet
*/
public class HystrixAsyncHttpCommand extends HystrixCommand<String> {
private URI uri;
private RequestConfig requestConfig;
HystrixAsyncHttpCommand(URI uri, int timeoutMillis) {
super(Setter
.withGroupKey(HystrixCommandGroupKey.Factory.asKey("hystrix-ratpack-async"))
.andCommandPropertiesDefaults(HystrixCommandProperties
.Setter()
.withExecutionTimeoutInMilliseconds(timeoutMillis)));
requestConfig = RequestConfig
.custom()
.setSocketTimeout(timeoutMillis)
.setConnectTimeout(timeoutMillis)
.setConnectionRequestTimeout(timeoutMillis)
.build();
this.uri = uri;
}
@Override
protected String run() throws Exception {
return EntityUtils.toString(HttpClientBuilder
.create()
.setDefaultRequestConfig(requestConfig)
.setDefaultHeaders(Collections.singleton(new BasicHeader("User-Agent", "Baeldung Blocking HttpClient")))
.build()
.execute(new HttpGet(uri))
.getEntity());
}
@Override
protected String getFallback() {
return "eugenp's async fallback profile";
}
}

44
ratpack/src/main/java/com/baeldung/hystrix/HystrixReactiveHttpCommand.java Normal file
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@ -0,0 +1,44 @@
package com.baeldung.hystrix;
import com.netflix.hystrix.HystrixCommandGroupKey;
import com.netflix.hystrix.HystrixCommandProperties;
import com.netflix.hystrix.HystrixObservableCommand;
import ratpack.http.client.HttpClient;
import ratpack.rx.RxRatpack;
import rx.Observable;
import java.net.URI;
/**
* @author aiet
*/
public class HystrixReactiveHttpCommand extends HystrixObservableCommand<String> {
private HttpClient httpClient;
private URI uri;
HystrixReactiveHttpCommand(HttpClient httpClient, URI uri, int timeoutMillis) {
super(Setter
.withGroupKey(HystrixCommandGroupKey.Factory.asKey("hystrix-ratpack-reactive"))
.andCommandPropertiesDefaults(HystrixCommandProperties
.Setter()
.withExecutionTimeoutInMilliseconds(timeoutMillis)));
this.httpClient = httpClient;
this.uri = uri;
}
@Override
protected Observable<String> construct() {
return RxRatpack.observe(httpClient
.get(uri, requestSpec -> requestSpec.headers(mutableHeaders -> mutableHeaders.add("User-Agent", "Baeldung HttpClient")))
.map(receivedResponse -> receivedResponse
.getBody()
.getText()));
}
@Override
protected Observable<String> resumeWithFallback() {
return Observable.just("eugenp's reactive fallback profile");
}
}

55
ratpack/src/main/java/com/baeldung/hystrix/HystrixSyncHttpCommand.java Normal file
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@ -0,0 +1,55 @@
package com.baeldung.hystrix;
import com.netflix.hystrix.HystrixCommand;
import com.netflix.hystrix.HystrixCommandGroupKey;
import com.netflix.hystrix.HystrixCommandProperties;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicHeader;
import org.apache.http.util.EntityUtils;
import java.net.URI;
import java.util.Collections;
/**
* @author aiet
*/
public class HystrixSyncHttpCommand extends HystrixCommand<String> {
private URI uri;
private RequestConfig requestConfig;
HystrixSyncHttpCommand(URI uri, int timeoutMillis) {
super(Setter
.withGroupKey(HystrixCommandGroupKey.Factory.asKey("hystrix-ratpack-sync"))
.andCommandPropertiesDefaults(HystrixCommandProperties
.Setter()
.withExecutionTimeoutInMilliseconds(timeoutMillis)));
requestConfig = RequestConfig
.custom()
.setSocketTimeout(timeoutMillis)
.setConnectTimeout(timeoutMillis)
.setConnectionRequestTimeout(timeoutMillis)
.build();
this.uri = uri;
}
@Override
protected String run() throws Exception {
HttpGet request = new HttpGet(uri);
return EntityUtils.toString(HttpClientBuilder
.create()
.setDefaultRequestConfig(requestConfig)
.setDefaultHeaders(Collections.singleton(new BasicHeader("User-Agent", "Baeldung Blocking HttpClient")))
.build()
.execute(request)
.getEntity());
}
@Override
protected String getFallback() {
return "eugenp's sync fallback profile";
}
}

30
ratpack/src/main/java/com/baeldung/hystrix/RatpackHystrixApp.java Normal file
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@ -0,0 +1,30 @@
package com.baeldung.hystrix;
import ratpack.guice.Guice;
import ratpack.http.client.HttpClient;
import ratpack.hystrix.HystrixMetricsEventStreamHandler;
import ratpack.hystrix.HystrixModule;
import ratpack.server.RatpackServer;
import java.net.URI;
public class RatpackHystrixApp {
public static void main(String[] args) throws Exception {
final int timeout = Integer.valueOf(System.getProperty("ratpack.hystrix.timeout"));
final URI eugenGithubProfileUri = new URI("https://api.github.com/users/eugenp");
RatpackServer.start(server -> server
.registry(Guice.registry(bindingsSpec -> bindingsSpec.module(new HystrixModule().sse())))
.handlers(chain -> chain
.get("rx", ctx -> new HystrixReactiveHttpCommand(ctx.get(HttpClient.class), eugenGithubProfileUri, timeout)
.toObservable()
.subscribe(ctx::render))
.get("async", ctx -> ctx.render(new HystrixAsyncHttpCommand(eugenGithubProfileUri, timeout)
.queue()
.get()))
.get("sync", ctx -> ctx.render(new HystrixSyncHttpCommand(eugenGithubProfileUri, timeout).execute()))
.get("hystrix", new HystrixMetricsEventStreamHandler())));
}
}

50
ratpack/src/test/java/com/baeldung/hystrix/RatpackHystrixAppFallbackLiveTest.java Normal file
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@ -0,0 +1,50 @@
package com.baeldung.hystrix;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import ratpack.test.MainClassApplicationUnderTest;
import static org.hamcrest.CoreMatchers.containsString;
import static org.junit.Assert.assertThat;
/**
* @author aiet
*/
public class RatpackHystrixAppFallbackLiveTest {
static MainClassApplicationUnderTest appUnderTest;
@BeforeClass
public static void setup() {
System.setProperty("ratpack.hystrix.timeout", "10");
appUnderTest = new MainClassApplicationUnderTest(RatpackHystrixApp.class);
}
@Test
public void whenFetchReactive_thenGotFallbackProfile() {
assertThat(appUnderTest
.getHttpClient()
.getText("rx"), containsString("reactive fallback profile"));
}
@Test
public void whenFetchAsync_thenGotFallbackProfile() {
assertThat(appUnderTest
.getHttpClient()
.getText("async"), containsString("async fallback profile"));
}
@Test
public void whenFetchSync_thenGotFallbackProfile() {
assertThat(appUnderTest
.getHttpClient()
.getText("sync"), containsString("sync fallback profile"));
}
@AfterClass
public static void clean() {
appUnderTest.close();
}
}

50
ratpack/src/test/java/com/baeldung/hystrix/RatpackHystrixAppLiveTest.java Normal file
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@ -0,0 +1,50 @@
package com.baeldung.hystrix;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import ratpack.test.MainClassApplicationUnderTest;
import static org.hamcrest.CoreMatchers.containsString;
import static org.junit.Assert.assertThat;
/**
* @author aiet
*/
public class RatpackHystrixAppLiveTest {
static MainClassApplicationUnderTest appUnderTest;
@BeforeClass
public static void setup() {
System.setProperty("ratpack.hystrix.timeout", "5000");
appUnderTest = new MainClassApplicationUnderTest(RatpackHystrixApp.class);
}
@Test
public void whenFetchReactive_thenGotEugenProfile() {
assertThat(appUnderTest
.getHttpClient()
.getText("rx"), containsString("www.baeldung.com"));
}
@Test
public void whenFetchAsync_thenGotEugenProfile() {
assertThat(appUnderTest
.getHttpClient()
.getText("async"), containsString("www.baeldung.com"));
}
@Test
public void whenFetchSync_thenGotEugenProfile() {
assertThat(appUnderTest
.getHttpClient()
.getText("sync"), containsString("www.baeldung.com"));
}
@AfterClass
public static void clean() {
appUnderTest.close();
}
}