Allow s.c.c.d.register=false to disable registering.

fixes gh-155

spring-cloud-consul-discovery/src/main/java/org/springframework/cloud/consul/discovery/ConsulDiscoveryProperties.java

@@ -120,6 +120,11 @@ public class ConsulDiscoveryProperties {
 	 */
 	private boolean queryPassing = false;
 
+	/**
+	 * Register as a service in consul.
+	 */
+	private boolean register = true;
+
 	@SuppressWarnings("unused")
 	private ConsulDiscoveryProperties() {}
 

spring-cloud-consul-discovery/src/main/java/org/springframework/cloud/consul/discovery/ConsulLifecycle.java

@@ -78,6 +78,10 @@ public class ConsulLifecycle extends AbstractDiscoveryLifecycle {
 
 	@Override
 	protected void register() {
+		if (!this.properties.isRegister()) {
+			log.debug("Registration disabled.");
+			return;
+		}
 		Assert.notNull(service.getPort(), "service.port has not been set");
 		String appName = getAppName();
 		service.setId(getServiceId());
@@ -132,6 +136,9 @@ public class ConsulLifecycle extends AbstractDiscoveryLifecycle {
 
 	@Override
 	protected void registerManagement() {
+		if (!this.properties.isRegister()) {
+			return;
+		}
 		NewService management = new NewService();
 		management.setId(getManagementServiceId());
 		management.setAddress(properties.getHostname());
@@ -177,6 +184,9 @@ public class ConsulLifecycle extends AbstractDiscoveryLifecycle {
 	}
 
 	private void deregister(String serviceId) {
+		if (!this.properties.isRegister()) {
+			return;
+		}
 		if (ttlScheduler != null) {
 			ttlScheduler.remove(serviceId);
 		}

spring-cloud-consul-discovery/src/test/java/org/springframework/cloud/consul/discovery/ConsulLifecycleRegistrationDisabledTests.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2013-2016 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.consul.discovery;
+
+import java.util.Map;
+
+import org.junit.FixMethodOrder;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.MethodSorters;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.boot.test.WebIntegrationTest;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+import com.ecwid.consul.v1.ConsulClient;
+import com.ecwid.consul.v1.Response;
+import com.ecwid.consul.v1.agent.model.Service;
+
+import static org.junit.Assert.assertNull;
+
+/**
+ * @author Spencer Gibb
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@FixMethodOrder(MethodSorters.NAME_ASCENDING)
+@SpringApplicationConfiguration(classes = TestPropsConfig.class)
+@WebIntegrationTest(value = { "spring.application.name=myTestNotRegisteredService",
+		"spring.cloud.consul.discovery.register=false"}, randomPort = true)
+public class ConsulLifecycleRegistrationDisabledTests {
+	@Autowired
+	private ConsulClient consul;
+
+	@Test
+	public void contextLoads() {
+		Response<Map<String, Service>> response = consul.getAgentServices();
+		Map<String, Service> services = response.getValue();
+		Service service = services.get("myTestNotRegisteredService");
+		assertNull("service was registered", service);
+	}
+}