Add hello world examples
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Alex Theedom
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.baeldung</groupId>
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<artifactId>hystrix</artifactId>
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<version>1.0</version>
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<name>hystrix</name>
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<properties>
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<!-- General -->
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<java.version>1.8</java.version>
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<!-- Hystrix -->
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<hystrix-core.version>1.4.10</hystrix-core.version>
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<rxjava-core.version>0.20.7</rxjava-core.version>
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<!-- Testing -->
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<hamcrest-all.version>1.3</hamcrest-all.version>
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<junit.version>4.12</junit.version>
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<!-- maven plugins -->
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<maven-compiler-plugin.version>3.5.1</maven-compiler-plugin.version>
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<maven-war-plugin.version>2.6</maven-war-plugin.version>
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<maven-surefire-plugin.version>2.19.1</maven-surefire-plugin.version>
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<maven-resources-plugin.version>2.7</maven-resources-plugin.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>com.netflix.hystrix</groupId>
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<artifactId>hystrix-core</artifactId>
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<version>${hystrix-core.version}</version>
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</dependency>
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<dependency>
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<groupId>com.netflix.rxjava</groupId>
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<artifactId>rxjava-core</artifactId>
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<version>${rxjava-core.version}</version>
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</dependency>
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<dependency>
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<groupId>org.hamcrest</groupId>
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<artifactId>hamcrest-all</artifactId>
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<version>${hamcrest-all.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>${junit.version}</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>${maven-compiler-plugin.version}</version>
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<configuration>
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<source>1.8</source>
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<target>1.8</target>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>
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package com.baeldung.hystrix;
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import com.netflix.hystrix.*;
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import com.netflix.hystrix.exception.HystrixRuntimeException;
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import org.junit.After;
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import org.junit.Before;
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import org.junit.Rule;
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import org.junit.Test;
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import org.junit.rules.ExpectedException;
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import static org.hamcrest.MatcherAssert.assertThat;
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import static org.hamcrest.Matchers.equalTo;
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public class HystrixTimeoutTest {
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private static HystrixCommand.Setter config;
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private static HystrixCommandProperties.Setter commandProperties = HystrixCommandProperties.Setter();
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@Rule
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public final ExpectedException exception = ExpectedException.none();
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@Before
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public void setup() {
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config = HystrixCommand
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.Setter
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.withGroupKey(HystrixCommandGroupKey.Factory.asKey("RemoteServiceGroup1"));
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}
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@Test
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public void givenTimeoutEqualTo100_andDefaultSettings_thenReturnSuccess() throws InterruptedException {
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assertThat(new RemoteServiceTestCommand(config, new RemoteServiceTestSimulator(100)).execute(), equalTo("Success"));
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}
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@Test
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public void givenTimeoutEqualTo10000_andDefaultSettings_thenExpectHystrixRuntimeException() throws InterruptedException {
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exception.expect(HystrixRuntimeException.class);
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new RemoteServiceTestCommand(config, new RemoteServiceTestSimulator(10_000)).execute();
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}
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@Test
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public void givenTimeoutEqualTo5000_andExecutionTimeoutEqualTo10000_thenReturnSuccess() throws InterruptedException {
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commandProperties.withExecutionTimeoutInMilliseconds(10_000);
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config.andCommandPropertiesDefaults(commandProperties);
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assertThat(new RemoteServiceTestCommand(config, new RemoteServiceTestSimulator(5_000)).execute(), equalTo("Success"));
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}
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@Test
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public void givenTimeoutEqualTo15000_andExecutionTimeoutEqualTo10000_thenExpectHystrixRuntimeException() throws InterruptedException {
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exception.expect(HystrixRuntimeException.class);
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commandProperties.withExecutionTimeoutInMilliseconds(10_000);
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config.andCommandPropertiesDefaults(commandProperties);
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new RemoteServiceTestCommand(config, new RemoteServiceTestSimulator(15_000)).execute();
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}
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}
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@ -0,0 +1,20 @@
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package com.baeldung.hystrix;
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import com.netflix.hystrix.HystrixCommand;
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import com.netflix.hystrix.HystrixCommandGroupKey;
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class RemoteServiceTestCommand extends HystrixCommand<String> {
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private final RemoteServiceTestSimulator remoteService;
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RemoteServiceTestCommand(Setter config, RemoteServiceTestSimulator remoteService) {
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super(config);
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this.remoteService = remoteService;
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}
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@Override
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protected String run() throws Exception {
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return remoteService.execute();
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}
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}
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@ -0,0 +1,16 @@
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package com.baeldung.hystrix;
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class RemoteServiceTestSimulator {
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private long wait;
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RemoteServiceTestSimulator(long wait) throws InterruptedException {
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this.wait = wait;
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}
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String execute() throws InterruptedException {
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Thread.sleep(wait);
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return "Success";
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}
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}
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