Sidecar reports true non-jvm app status to eureka.

Added a LocalApplicationHealthCheckHandler that checks the local app and sends the appropriate status to eureka.

fixes gh-251

spring-cloud-netflix-sidecar/src/main/java/org/springframework/cloud/netflix/sidecar/LocalApplicationHealthCheckHandler.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2013-2015 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.sidecar;
+
+import static com.netflix.appinfo.InstanceInfo.InstanceStatus.DOWN;
+import static com.netflix.appinfo.InstanceInfo.InstanceStatus.OUT_OF_SERVICE;
+import static com.netflix.appinfo.InstanceInfo.InstanceStatus.UNKNOWN;
+import static com.netflix.appinfo.InstanceInfo.InstanceStatus.UP;
+
+import com.netflix.appinfo.HealthCheckHandler;
+import com.netflix.appinfo.InstanceInfo.InstanceStatus;
+import org.springframework.boot.actuate.health.HealthIndicator;
+import org.springframework.boot.actuate.health.Status;
+
+/**
+ * Eureka HealthCheckHandler that translates boot health status to
+ * InstanceStatus so the proper status of the non-JVM app is sent to Eureka.
+* @author Spencer Gibb
+*/
+class LocalApplicationHealthCheckHandler implements HealthCheckHandler {
+
+    private final HealthIndicator healthIndicator;
+
+    public LocalApplicationHealthCheckHandler(HealthIndicator healthIndicator) {
+        this.healthIndicator = healthIndicator;
+    }
+
+    @Override
+    public InstanceStatus getStatus(InstanceStatus currentStatus) {
+        Status status = healthIndicator.health().getStatus();
+        if (status.equals(Status.UP)) {
+            return UP;
+        } else if (status.equals(Status.OUT_OF_SERVICE)) {
+            return OUT_OF_SERVICE;
+        } else if (status.equals(Status.DOWN)) {
+            return DOWN;
+        }
+        return UNKNOWN;
+    }
+}

spring-cloud-netflix-sidecar/src/main/java/org/springframework/cloud/netflix/sidecar/SidecarConfiguration.java

@@ -25,6 +25,7 @@ import org.springframework.cloud.netflix.eureka.EurekaInstanceConfigBean;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 
+import com.netflix.appinfo.HealthCheckHandler;
 import com.netflix.discovery.EurekaClientConfig;
 
 /**
@@ -63,6 +64,13 @@ public class SidecarConfiguration {
 					+ config.getHomePageUrlPath());
 			return config;
 		}
+
+		@Bean
+		public HealthCheckHandler healthCheckHandler(
+				final LocalApplicationHealthIndicator healthIndicator) {
+			return new LocalApplicationHealthCheckHandler(healthIndicator);
+		}
+
 	}
 
 	@Bean

spring-cloud-netflix-sidecar/src/test/java/org/springframework/cloud/netflix/sidecar/LocalApplicationHealthCheckHandlerTests.java

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2013-2015 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.sidecar;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.MockitoAnnotations.initMocks;
+import static org.mockito.BDDMockito.*;
+
+import com.netflix.appinfo.InstanceInfo.InstanceStatus;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.springframework.boot.actuate.health.Health;
+import org.springframework.boot.actuate.health.HealthIndicator;
+
+/**
+ * @author Spencer Gibb
+ */
+public class LocalApplicationHealthCheckHandlerTests {
+
+    @Mock
+    private HealthIndicator healthIndicator;
+
+    @Before
+    public void setup() {
+        initMocks(this);
+    }
+
+    @Test
+    public void upMappingWorks() {
+        assertStatus(InstanceStatus.UP, Health.up());
+    }
+
+    @Test
+    public void downMappingWorks() {
+        assertStatus(InstanceStatus.DOWN, Health.down());
+    }
+
+    @Test
+    public void outOfServiceMappingWorks() {
+        assertStatus(InstanceStatus.OUT_OF_SERVICE, Health.outOfService());
+    }
+
+    @Test
+    public void unkownMappingWorks() {
+        assertStatus(InstanceStatus.UNKNOWN, Health.unknown());
+    }
+
+    private void assertStatus(InstanceStatus expected, Health.Builder builder) {
+        given(healthIndicator.health()).willReturn(builder.build());
+
+        LocalApplicationHealthCheckHandler handler = new LocalApplicationHealthCheckHandler(healthIndicator);
+        InstanceStatus status = handler.getStatus(InstanceStatus.UP);
+        assertEquals(expected, status);
+    }
+}