Regression fix for hystrix stream without eureka registration

spring-cloud-netflix-hystrix-stream/src/main/java/org/springframework/cloud/netflix/hystrix/stream/HystrixStreamAutoConfiguration.java

@@ -22,7 +22,10 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.cloud.client.ServiceInstance;
 import org.springframework.cloud.client.actuator.HasFeatures;
+import org.springframework.cloud.client.discovery.DiscoveryClient;
+import org.springframework.cloud.client.discovery.simple.SimpleDiscoveryClient;
 import org.springframework.cloud.client.serviceregistry.Registration;
 import org.springframework.cloud.stream.annotation.EnableBinding;
 import org.springframework.cloud.stream.annotation.Output;
@@ -97,8 +100,12 @@ public class HystrixStreamAutoConfiguration {
 	}
 
 	@Bean
-	public HystrixStreamTask hystrixStreamTask() {
-		return new HystrixStreamTask(this.outboundChannel, this.registration,
+	public HystrixStreamTask hystrixStreamTask(SimpleDiscoveryClient simpleDiscoveryClient) {
+		ServiceInstance serviceInstance = this.registration;
+		if (serviceInstance == null) {
+			serviceInstance = simpleDiscoveryClient.getLocalServiceInstance();
+		}
+		return new HystrixStreamTask(this.outboundChannel, serviceInstance,
 				this.properties);
 	}
 

spring-cloud-netflix-hystrix-stream/src/main/java/org/springframework/cloud/netflix/hystrix/stream/HystrixStreamTask.java

@@ -22,28 +22,27 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.concurrent.LinkedBlockingQueue;
 
-import com.fasterxml.jackson.core.JsonFactory;
-import com.fasterxml.jackson.core.JsonGenerator;
-import com.netflix.hystrix.HystrixCircuitBreaker;
-import com.netflix.hystrix.HystrixCommandKey;
-import com.netflix.hystrix.HystrixCommandMetrics;
-import com.netflix.hystrix.HystrixCommandProperties;
-import com.netflix.hystrix.HystrixThreadPoolKey;
-import com.netflix.hystrix.HystrixThreadPoolMetrics;
-import com.netflix.hystrix.util.HystrixRollingNumberEvent;
-
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
-
 import org.springframework.beans.BeansException;
 import org.springframework.cloud.client.ServiceInstance;
-import org.springframework.cloud.client.serviceregistry.Registration;
 import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
 import org.springframework.messaging.MessageChannel;
 import org.springframework.messaging.MessageHeaders;
 import org.springframework.messaging.support.MessageBuilder;
 import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.util.Assert;
+
+import com.fasterxml.jackson.core.JsonFactory;
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.netflix.hystrix.HystrixCircuitBreaker;
+import com.netflix.hystrix.HystrixCommandKey;
+import com.netflix.hystrix.HystrixCommandMetrics;
+import com.netflix.hystrix.HystrixCommandProperties;
+import com.netflix.hystrix.HystrixThreadPoolKey;
+import com.netflix.hystrix.HystrixThreadPoolMetrics;
+import com.netflix.hystrix.util.HystrixRollingNumberEvent;
 
 /**
  * @author Spencer Gibb
@@ -57,7 +56,7 @@ public class HystrixStreamTask implements ApplicationContextAware {
 
 	private MessageChannel outboundChannel;
 
-	private Registration registration;
+	private ServiceInstance registration;
 
 	private HystrixStreamProperties properties;
 
@@ -69,13 +68,20 @@ public class HystrixStreamTask implements ApplicationContextAware {
 	private final JsonFactory jsonFactory = new JsonFactory();
 
 	public HystrixStreamTask(MessageChannel outboundChannel,
-							 Registration registration, HystrixStreamProperties properties) {
+							 ServiceInstance registration, HystrixStreamProperties properties) {
+		Assert.notNull(outboundChannel, "outboundChannel may not be null");
+		Assert.notNull(registration, "registration may not be null");
+		Assert.notNull(properties, "properties may not be null");
 		this.outboundChannel = outboundChannel;
 		this.registration = registration;
 		this.properties = properties;
 		this.jsonMetrics = new LinkedBlockingQueue<>(properties.getSize());
 	}
 
+	/* for testing */ ServiceInstance getRegistration() {
+		return registration;
+	}
+
 	@Override
 	public void setApplicationContext(ApplicationContext applicationContext)
 			throws BeansException {

spring-cloud-netflix-hystrix-stream/src/test/java/org/springframework/cloud/netflix/hystrix/stream/HystrixStreamAutoConfigurationNoRegistrationTests.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright 2013-2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.netflix.hystrix.stream;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringBootConfiguration;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.cloud.client.discovery.simple.SimpleDiscoveryClient;
+import org.springframework.cloud.client.serviceregistry.Registration;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Spencer Gibb
+ */
+@RunWith(SpringRunner.class)
+@SpringBootTest("eureka.client.enabled=false")
+@DirtiesContext
+public class HystrixStreamAutoConfigurationNoRegistrationTests {
+
+	@Autowired
+	HystrixStreamTask task;
+
+	@Autowired(required = false)
+	Registration registration;
+
+	@Autowired
+	SimpleDiscoveryClient simpleDiscoveryClient;
+
+	@Test
+	public void withoutRegistrationWorks() throws Exception {
+		assertThat(this.registration).isNull();
+		assertThat(this.simpleDiscoveryClient).isNotNull();
+		assertThat(task.getRegistration()).isEqualTo(this.simpleDiscoveryClient.getLocalServiceInstance());
+	}
+
+	@EnableAutoConfiguration
+	@SpringBootConfiguration
+	protected static class Config {
+	}
+
+}

spring-cloud-netflix-hystrix-stream/src/test/java/org/springframework/cloud/netflix/hystrix/stream/HystrixStreamAutoConfigurationTests.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2013-2017 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.netflix.hystrix.stream;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.SpringBootConfiguration;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.cloud.client.serviceregistry.Registration;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author Spencer Gibb
+ */
+@RunWith(SpringRunner.class)
+@DirtiesContext
+public class HystrixStreamAutoConfigurationTests {
+
+	@Autowired
+	HystrixStreamTask task;
+
+	@Autowired
+	Registration registration;
+
+	@Test
+	public void withRegistrationWorks() throws Exception {
+		assertThat(task.getRegistration()).isEqualTo(this.registration);
+	}
+
+	@EnableAutoConfiguration
+	@SpringBootConfiguration
+	protected static class Config {
+	}
+
+}