Going back to snapshots

This commit is contained in:
buildmaster
2018-04-20 18:53:06 +00:00
parent 142f90dee9
commit 62174be70f
8 changed files with 16 additions and 33 deletions

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= Spring Cloud Bus
Spring Cloud Bus links the nodes of a distributed system with a lightweight message
broker. This broker can then be used to broadcast state changes (such as configuration
changes) or other management instructions. A key idea is that the bus is like a
distributed actuator for a Spring Boot application that is scaled out. However, it can
also be used as a communication channel between apps. This project provides starters for
either an AMQP broker or Kafka as the transport.
Spring Cloud Bus links nodes of a distributed system with a lightweight message broker. This can then be used to broadcast state changes (e.g. configuration changes) or other management instructions. A key idea is that the Bus is like a distributed Actuator for a Spring Boot application that is scaled out, but it can also be used as a communication channel between apps. Starters are provided for an AMQP broker as the transport or for Kafka, but the same basic feature set (and some more depending on the transport) is on the roadmap for other transports.
== Quick Start
Spring Cloud Bus works by adding Spring Boot autconfiguration if it detects itself on the
classpath. To enable the bus, add `spring-cloud-starter-bus-amqp` or
`spring-cloud-starter-bus-kafka` to your dependency management. Spring Cloud takes care of
the rest. Make sure the broker (RabbitMQ or Kafka) is available and configured. When
running on localhost, you need not do anything. If you run remotely, use Spring Cloud
Connectors or Spring Boot conventions to define the broker credentials, as shown in the
following example for Rabbit:
Spring Cloud Bus works by adding Spring Boot autconfiguration if it detects itself on the classpath. All you need to do to enable the bus is to add `spring-cloud-starter-bus-amqp` or `spring-cloud-starter-bus-kafka` to your dependency management and Spring Cloud takes care of the rest. Make sure the broker (RabbitMQ or Kafka) is available and configured: running on localhost you shouldn't have to do anything, but if you are running remotely use Spring Cloud Connectors, or Spring Boot conventions to define the broker credentials, e.g. for Rabbit
.application.yml
----
@@ -29,16 +19,9 @@ spring:
password: secret
----
The bus currently supports sending messages to all nodes listening or all nodes for a
particular service (as defined by Eureka). The `/bus/*` actuator namespace has some HTTP
endpoints. Currently, two are implemented. The first, `/bus/env`, sends key/value pairs to
update each node's Spring Environment. The second, `/bus/refresh`, reloads each
application's configuration, as though they had all been pinged on their `/refresh`
endpoint.
The bus currently supports sending messages to all nodes listening or all nodes for a particular service (as defined by Eureka). More selector criteria may be added in the future (ie. only service X nodes in data center Y, etc...). There are also some http endpoints under the `/bus/*` actuator namespace. There are currently two implemented. The first, `/bus/env`, sends key/value pairs to update each node's Spring Environment. The second, `/bus/refresh`, will reload each application's configuration, just as if they had all been pinged on their `/refresh` endpoint.
NOTE: The Spring Cloud Bus starters cover Rabbit and Kafka, because those are the two most
common implementations. However, Spring Cloud Stream is quite flexible, and the binder
works with `spring-cloud-bus`.
NOTE: The Bus starters cover Rabbit and Kafka, because those are the two most common implementations, but Spring Cloud Stream is quite flexible and binder will work combined with `spring-cloud-bus`.
== Building

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<parent>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-bus-parent</artifactId>
<version>2.0.0.RC1</version>
<version>2.0.0.BUILD-SNAPSHOT</version>
</parent>
<packaging>pom</packaging>
<name>Spring Cloud Bus Docs</name>

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@@ -4,7 +4,7 @@
<modelVersion>4.0.0</modelVersion>
<artifactId>spring-cloud-bus-parent</artifactId>
<version>2.0.0.RC1</version>
<version>2.0.0.BUILD-SNAPSHOT</version>
<packaging>pom</packaging>
<name>spring-cloud-bus-parent</name>
@@ -13,7 +13,7 @@
<parent>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-build</artifactId>
<version>2.0.0.RELEASE</version>
<version>2.0.0.BUILD-SNAPSHOT</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
@@ -27,8 +27,8 @@
</modules>
<properties>
<spring-cloud-commons.version>2.0.0.RC1</spring-cloud-commons.version>
<spring-cloud-stream.version>Elmhurst.RELEASE</spring-cloud-stream.version>
<spring-cloud-commons.version>2.0.0.BUILD-SNAPSHOT</spring-cloud-commons.version>
<spring-cloud-stream.version>Elmhurst.BUILD-SNAPSHOT</spring-cloud-stream.version>
<bintray.package>bus</bintray.package>
</properties>

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<parent>
<artifactId>spring-cloud-dependencies-parent</artifactId>
<groupId>org.springframework.cloud</groupId>
<version>2.0.0.RELEASE</version>
<version>2.0.0.BUILD-SNAPSHOT</version>
<relativePath/>
</parent>
<artifactId>spring-cloud-bus-dependencies</artifactId>
<version>2.0.0.RC1</version>
<version>2.0.0.BUILD-SNAPSHOT</version>
<packaging>pom</packaging>
<name>spring-cloud-bus-dependencies</name>
<description>Spring Cloud Bus Dependencies</description>

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<parent>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-bus-parent</artifactId>
<version>2.0.0.RC1</version>
<version>2.0.0.BUILD-SNAPSHOT</version>
<relativePath>..</relativePath> <!-- lookup parent from repository -->
</parent>

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@@ -12,7 +12,7 @@
<parent>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-bus-parent</artifactId>
<version>2.0.0.RC1</version>
<version>2.0.0.BUILD-SNAPSHOT</version>
<relativePath>..</relativePath> <!-- lookup parent from repository -->
</parent>

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@@ -5,7 +5,7 @@
<parent>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-bus-parent</artifactId>
<version>2.0.0.RC1</version>
<version>2.0.0.BUILD-SNAPSHOT</version>
<relativePath>..</relativePath>
</parent>
<artifactId>spring-cloud-starter-bus-amqp</artifactId>

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@@ -5,7 +5,7 @@
<parent>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-bus-parent</artifactId>
<version>2.0.0.RC1</version>
<version>2.0.0.BUILD-SNAPSHOT</version>
<relativePath>..</relativePath>
</parent>
<artifactId>spring-cloud-starter-bus-kafka</artifactId>