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12 changes: 12 additions & 0 deletions .gitignore
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node_modules
package-lock.json
npm-debug.log
.DS_Store
coverage
.nyc_output
api-docs
**/*.tgz
packages/*/dist*
examples/*/dist*
**/package
.sandbox
23 changes: 23 additions & 0 deletions .travis.yml
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language: node_js
cache:
directories:
- ~/.npm
notifications:
email: false
node_js:
- '8'
- '6'
- '10'

before_install:
- npm install -g npm

script:
- npm test

after_script:
- npm install coveralls && npm run coveralls

branches:
except:
- /^v\d+\.\d+\.\d+$/
17 changes: 17 additions & 0 deletions .vscode/launch.json
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{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"type": "node",
"request": "launch",
"name": "Launch Program",
"program": "${workspaceFolder}/lib/index.js",
"outFiles": [
"${workspaceFolder}/**/*.js"
]
}
]
}
4 changes: 4 additions & 0 deletions .vscode/settings.json
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{
"mocha.options": {},
"mocha.files.glob": "./test/*/*.test.js",
}
177 changes: 177 additions & 0 deletions LICENSE
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72 changes: 72 additions & 0 deletions README.md
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# Cloud Health Connect
<p align=center>
<a href='http://CloudNativeJS.io/'><img src='https://img.shields.io/badge/homepage-CloudNativeJS-blue.svg'></a>
<a href="http://travis-ci.org/CloudNativeJS/cloud-health-connect"><img src="https://secure.travis-ci.org/CloudNativeJS/cloud-health-connect.svg?branch=master" alt="Build status"></a>
<a href='https://coveralls.io/github/CloudNaitveJS/cloud-health-connect?branch=master'><img src='https://coveralls.io/repos/github/CloudNativeJS/cloud-health-connect/badge.svg?branch=master' alt='Coverage Status' /></a>
<a href='http://github.com/CloudNativeJS/ModuleLTS'><img src='https://img.shields.io/badge/Module%20LTS-Adopted-brightgreen.svg?style=flat' alt='Module LTS Adopted' /></a>
<a href='http://ibm.biz/node-support'><img src='https://img.shields.io/badge/IBM%20Support-Frameworks-brightgreen.svg?style=flat' alt='IBM Support' /></a>
</p>

Cloud Health Connect provides a Connect Middleware for use in Express.js, Loopback and other frameworks that uses [Cloud Health](http://github.com/CloudNativeJS/cloud-health) to provide:

* Readiness checks
* Liveness checks
* Shutdown handling

to enable applications for use with Kubernetes and Cloud Foundry based clouds.

## Using Cloud Health Connect

Cloud Health Connect takes the status reported by [Cloud Health](http://github.com/CloudNativeJS/cloud-health) and makes it available on the liveness and/or readiness URL endpoints that the middleware is configured to use.

The middleware writes the data returned by the Cloud Health module as JSON, and sets the HTTP Status Code as follows:

| Cloud Health Status | Readiness Status Code | Liveness Status Code |
|---------------------|-----------------------|----------------------|
| STARTING | 503 UNAVAILABLE | 200 OK |
| UP | 200 OK | 200 OK |
| DOWN | 503 UNAVAILABLE | 503 UNAVAILABLE |
| STOPPING | 503 UNAVAILABLE | 503 UNAVAILABLE |
| STOPPED | 503 UNAVAILABLE | 503 UNAVAILABLE |
| - | 500 SERVER ERROR | 500 SERVER ERROR |


### Using Cloud Health with Node.js
1. Set up a HealthChecker:

```js
const health = require('@cloudnative/health-connect');
let healthcheck = new health.HealthChecker();
```

2. Register a Liveness endpoint:

```js
app.use('/health', health.LivenessEndpoint(healthcheck))
```
If no livessness checks are registered, this will report `200 OK` and `UP`.

3. Register a readiness endpoint:

```js
app.use('/ready', health.ReadinessEndpoint(healthcheck))
```
If no readiness checks are registered, this will report `200 OK` and `UP`.

For information on how to register startup, liveness and shutdown checks, see the [Cloud Health documentation](https://github.com/CloudNativeJS/cloud-health/blob/master/README.md).

### Using Cloud Health Connect with Typescript
The Cloud Health Connect module is created in TypeScript and as such provides out of the box TypeScript support.

## Module Long Term Support Policy

This module adopts the [Module Long Term Support (LTS)](http://github.com/CloudNativeJS/ModuleLTS) policy, with the following End Of Life (EOL) dates:

| Module Version | Release Date | Minimum EOL | EOL With | Status |
|------------------|--------------|-------------|--------------|---------|
| 1.x.x | July 2018 | Dec 2019 | | Current |


## License

[Apache-2.0](LICENSE)
1 change: 1 addition & 0 deletions index.d.ts
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export * from "./src/connect-cloud-health/ConnectHealth";
22 changes: 22 additions & 0 deletions index.js

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17 changes: 17 additions & 0 deletions index.ts
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/*
* Copyright IBM Corporation 2018
*
* 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.
*/

export * from "./src/connect-cloud-health/ConnectHealth";
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