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<title>Cloud Native Applications</title><link rel="stylesheet" type="text/css" href="css/manual-singlepage.css"><meta name="generator" content="DocBook XSL Stylesheets V1.79.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div lang="en" class="book"><div class="titlepage"><div><div><h1 class="title"><a name="d0e3"></a>Cloud Native Applications</h1></div></div><hr></div><div class="toc"><p><b>Table of Contents</b></p><dl class="toc"><dt><span class="preface"><a href="#d0e9"></a></span></dt><dt><span class="chapter"><a href="#_spring_cloud_context_application_context_services">1. Spring Cloud Context: Application Context Services</a></span></dt><dd><dl><dt><span class="section"><a href="#_the_bootstrap_application_context">1.1. The Bootstrap Application Context</a></span></dt><dt><span class="section"><a href="#_application_context_hierarchies">1.2. Application Context Hierarchies</a></span></dt><dt><span class="section"><a href="#customizing-bootstrap-properties">1.3. Changing the Location of Bootstrap Properties</a></span></dt><dt><span class="section"><a href="#overriding-bootstrap-properties">1.4. Overriding the Values of Remote Properties</a></span></dt><dt><span class="section"><a href="#_customizing_the_bootstrap_configuration">1.5. Customizing the Bootstrap Configuration</a></span></dt><dt><span class="section"><a href="#customizing-bootstrap-property-sources">1.6. Customizing the Bootstrap Property Sources</a></span></dt><dt><span class="section"><a href="#_logging_configuration">1.7. Logging Configuration</a></span></dt><dt><span class="section"><a href="#_environment_changes">1.8. Environment Changes</a></span></dt><dt><span class="section"><a href="#refresh-scope">1.9. Refresh Scope</a></span></dt><dt><span class="section"><a href="#_encryption_and_decryption">1.10. Encryption and Decryption</a></span></dt><dt><span class="section"><a href="#_endpoints">1.11. Endpoints</a></span></dt></dl></dd><dt><span class="chapter"><a href="#_spring_cloud_commons_common_abstractions">2. Spring Cloud Commons: Common Abstractions</a></span></dt><dd><dl><dt><span class="section"><a href="#_enablediscoveryclient">2.1. @EnableDiscoveryClient</a></span></dt><dd><dl><dt><span class="section"><a href="#_health_indicator">2.1.1. Health Indicator</a></span></dt><dt><span class="section"><a href="#_ordering_discoveryclient_instances">2.1.2. Ordering <code class="literal">DiscoveryClient</code> instances</a></span></dt></dl></dd><dt><span class="section"><a href="#_serviceregistry">2.2. ServiceRegistry</a></span></dt><dd><dl><dt><span class="section"><a href="#_serviceregistry_auto_registration">2.2.1. ServiceRegistry Auto-Registration</a></span></dt><dd><dl><dt><span class="section"><a href="#_serviceregistry_auto_registration_events">ServiceRegistry Auto-Registration Events</a></span></dt></dl></dd><dt><span class="section"><a href="#_service_registry_actuator_endpoint">2.2.2. Service Registry Actuator Endpoint</a></span></dt></dl></dd><dt><span class="section"><a href="#_spring_resttemplate_as_a_load_balancer_client">2.3. Spring RestTemplate as a Load Balancer Client</a></span></dt><dt><span class="section"><a href="#_spring_webclient_as_a_load_balancer_client">2.4. Spring WebClient as a Load Balancer Client</a></span></dt><dd><dl><dt><span class="section"><a href="#_retrying_failed_requests">2.4.1. Retrying Failed Requests</a></span></dt></dl></dd><dt><span class="section"><a href="#_multiple_resttemplate_objects">2.5. Multiple RestTemplate objects</a></span></dt><dt><span class="section"><a href="#loadbalanced-webclient">2.6. Spring WebFlux WebClient as a Load Balancer Client</a></span></dt><dt><span class="section"><a href="#ignore-network-interfaces">2.7. Ignore Network Interfaces</a></span></dt><dt><span class="section"><a href="#http-clients">2.8. HTTP Client Factories</a></span></dt><dt><span class="section"><a href="#enabled-features">2.9. Enabled Features</a></span></dt><dd><dl><dt><span class="section"><a href="#_feature_types">2.9.1. Feature types</a></span></dt><dt><span class="section"><a href="#_declaring_features">2.9.2. Declaring features</a></span></dt></dl></dd></dl></dd></dl></div><div class="preface"><div class="titlepage"><div><div><h1 class="title"><a name="d0e9" href="#d0e9"></a></h1></div></div></div><p><a class="link" href="http://pivotal.io/platform-as-a-service/migrating-to-cloud-native-application-architectures-ebook" target="_top">Cloud Native</a> is a style of application development that encourages easy adoption of best practices in the areas of continuous delivery and value-driven development.
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<title>Cloud Native Applications</title><link rel="stylesheet" type="text/css" href="css/manual-singlepage.css"><meta name="generator" content="DocBook XSL Stylesheets V1.79.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div lang="en" class="book"><div class="titlepage"><div><div><h1 class="title"><a name="d0e3"></a>Cloud Native Applications</h1></div></div><hr></div><div class="toc"><p><b>Table of Contents</b></p><dl class="toc"><dt><span class="preface"><a href="#d0e9"></a></span></dt><dt><span class="chapter"><a href="#_spring_cloud_context_application_context_services">1. Spring Cloud Context: Application Context Services</a></span></dt><dd><dl><dt><span class="section"><a href="#_the_bootstrap_application_context">1.1. The Bootstrap Application Context</a></span></dt><dt><span class="section"><a href="#_application_context_hierarchies">1.2. Application Context Hierarchies</a></span></dt><dt><span class="section"><a href="#customizing-bootstrap-properties">1.3. Changing the Location of Bootstrap Properties</a></span></dt><dt><span class="section"><a href="#overriding-bootstrap-properties">1.4. Overriding the Values of Remote Properties</a></span></dt><dt><span class="section"><a href="#_customizing_the_bootstrap_configuration">1.5. Customizing the Bootstrap Configuration</a></span></dt><dt><span class="section"><a href="#customizing-bootstrap-property-sources">1.6. Customizing the Bootstrap Property Sources</a></span></dt><dt><span class="section"><a href="#_logging_configuration">1.7. Logging Configuration</a></span></dt><dt><span class="section"><a href="#_environment_changes">1.8. Environment Changes</a></span></dt><dt><span class="section"><a href="#refresh-scope">1.9. Refresh Scope</a></span></dt><dt><span class="section"><a href="#_encryption_and_decryption">1.10. Encryption and Decryption</a></span></dt><dt><span class="section"><a href="#_endpoints">1.11. Endpoints</a></span></dt></dl></dd><dt><span class="chapter"><a href="#_spring_cloud_commons_common_abstractions">2. Spring Cloud Commons: Common Abstractions</a></span></dt><dd><dl><dt><span class="section"><a href="#_enablediscoveryclient">2.1. @EnableDiscoveryClient</a></span></dt><dd><dl><dt><span class="section"><a href="#_health_indicator">2.1.1. Health Indicator</a></span></dt><dt><span class="section"><a href="#_ordering_discoveryclient_instances">2.1.2. Ordering <code class="literal">DiscoveryClient</code> instances</a></span></dt></dl></dd><dt><span class="section"><a href="#_serviceregistry">2.2. ServiceRegistry</a></span></dt><dd><dl><dt><span class="section"><a href="#_serviceregistry_auto_registration">2.2.1. ServiceRegistry Auto-Registration</a></span></dt><dd><dl><dt><span class="section"><a href="#_serviceregistry_auto_registration_events">ServiceRegistry Auto-Registration Events</a></span></dt></dl></dd><dt><span class="section"><a href="#_service_registry_actuator_endpoint">2.2.2. Service Registry Actuator Endpoint</a></span></dt></dl></dd><dt><span class="section"><a href="#_spring_resttemplate_as_a_load_balancer_client">2.3. Spring RestTemplate as a Load Balancer Client</a></span></dt><dt><span class="section"><a href="#_spring_webclient_as_a_load_balancer_client">2.4. Spring WebClient as a Load Balancer Client</a></span></dt><dd><dl><dt><span class="section"><a href="#_retrying_failed_requests">2.4.1. Retrying Failed Requests</a></span></dt></dl></dd><dt><span class="section"><a href="#_multiple_resttemplate_objects">2.5. Multiple RestTemplate objects</a></span></dt><dt><span class="section"><a href="#loadbalanced-webclient">2.6. Spring WebFlux WebClient as a Load Balancer Client</a></span></dt><dt><span class="section"><a href="#ignore-network-interfaces">2.7. Ignore Network Interfaces</a></span></dt><dt><span class="section"><a href="#http-clients">2.8. HTTP Client Factories</a></span></dt><dt><span class="section"><a href="#enabled-features">2.9. Enabled Features</a></span></dt><dd><dl><dt><span class="section"><a href="#_feature_types">2.9.1. Feature types</a></span></dt><dt><span class="section"><a href="#_declaring_features">2.9.2. Declaring features</a></span></dt></dl></dd><dt><span class="section"><a href="#_spring_cloud_compatibility_verification">2.10. Spring Cloud Compatibility Verification</a></span></dt></dl></dd></dl></div><div class="preface"><div class="titlepage"><div><div><h1 class="title"><a name="d0e9" href="#d0e9"></a></h1></div></div></div><p><a class="link" href="http://pivotal.io/platform-as-a-service/migrating-to-cloud-native-application-architectures-ebook" target="_top">Cloud Native</a> is a style of application development that encourages easy adoption of best practices in the areas of continuous delivery and value-driven development.
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A related discipline is that of building <a class="link" href="http://12factor.net/" target="_top">12-factor Applications</a>, in which development practices are aligned with delivery and operations goals — for instance, by using declarative programming and management and monitoring.
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Spring Cloud facilitates these styles of development in a number of specific ways.
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The starting point is a set of features to which all components in a distributed system need easy access.</p><p>Many of those features are covered by <a class="link" href="http://projects.spring.io/spring-boot" target="_top">Spring Boot</a>, on which Spring Cloud builds. Some more features are delivered by Spring Cloud as two libraries: Spring Cloud Context and Spring Cloud Commons.
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@@ -326,4 +326,26 @@ HasFeatures localFeatures() {
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.namedFeature(<span xmlns:d="http://docbook.org/ns/docbook" class="hl-keyword">new</span> NamedFeature(<span xmlns:d="http://docbook.org/ns/docbook" class="hl-string">"Bar Feature"</span>, Bar.<span xmlns:d="http://docbook.org/ns/docbook" class="hl-keyword">class</span>))
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.abstractFeature(Baz.<span xmlns:d="http://docbook.org/ns/docbook" class="hl-keyword">class</span>)
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.build();
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}</pre><p>Each of these beans should go in an appropriately guarded <code class="literal">@Configuration</code>.</p></div></div></div></div></body></html>
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}</pre><p>Each of these beans should go in an appropriately guarded <code class="literal">@Configuration</code>.</p></div></div><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="_spring_cloud_compatibility_verification" href="#_spring_cloud_compatibility_verification"></a>2.10 Spring Cloud Compatibility Verification</h2></div></div></div><p>Due to the fact that some users have problem with setting up Spring Cloud application, we’ve decided
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to add a compatibility verification mechanism. It will break if your current setup is not compatible
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with Spring Cloud requirements, together with a report, showing what exactly went wrong.</p><p>At the moment we verify which version of Spring Boot is added to your classpath.</p><p>Example of a report</p><pre class="screen">***************************
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APPLICATION FAILED TO START
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***************************
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Description:
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Your project setup is incompatible with our requirements due to following reasons:
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- Spring Boot [2.1.0.RELEASE] is not compatible with this Spring Cloud release train
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Action:
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Consider applying the following actions:
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- Change Spring Boot version to one of the following versions [1.2.x, 1.3.x] .
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You can find the latest Spring Boot versions here [https://spring.io/projects/spring-boot#learn].
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If you want to learn more about the Spring Cloud Release train compatibility, you can visit this page [https://spring.io/projects/spring-cloud#overview] and check the [Release Trains] section.</pre><p>In order to disable this feature, set <code class="literal">spring.cloud.compatibility-verifier.enabled</code> to <code class="literal">false</code>.
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If you want to override the compatible Spring Boot versions, just set the
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<code class="literal">spring.cloud.compatibility-verifier.compatible-boot-versions</code> property with a comma separated list
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of compatible Spring Boot versions.</p></div></div></div></body></html>
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