Support methods as async function for hapi
npm install hapi-async-methodsThis plugin is used to solve 2 problems.
1. Use async function as method instead of thunk. Therefore, you can use await/ yield inside and outside your method call.
2. server.method by scanning directory.
Note: Bluebird is required, the Promise return from the method is instance of Bluebird.
npm install --save bluebird
npm install --save hapi-async-methods
The traditional way of method config used by Hapi
The method config
javascript
{
name: 'hello',
method: function (name, next) {
return next(null, 'Hello, ' + name);
}
}
`
With this plugin, you can write like this (with babel-register and preset es2015 or es2015-node5).
`javascript
{
name: 'hello',
method: async function (name) {
return 'Hello, ' + name;
}
}
`
or
`javascript
{
name: 'hello',
method: Promise.coroutine(function *(name) {
return 'Hello, ' + name;
})
}
`Options
name (Optional): This is the output name for the async method package. (i.e server.decorate(name, methodsAsync). The default value is 'methodsAsync'.
Example
`javascript
server.method({
name: 'hello',
method: async function (name) {
return 'Hello, ' + name;
}
})
`
Then you can access the async method by server.methodsAsync
`javascript
function(request, reply) {
request.server.methodsAsync.hello('Raymond').then((result) => {
.....
});
// you can also access the thunk instead of async function
request.server.methods.hello('Raymond', (err, result) => {
.....
});
}
`
You may interested in hapi-async-route to make handler also act as async function.
methods (Optional): This is the array of dir path you want to scan the method config with method as async function, it is much convenient if you don't want to server.method or write thunk function manually.
The thunk method can be accessed by server.methods[methodName]. The async method can be accessed by server.methodsAsync[methodName].
The file inside the directory should module.exports or export default the following
1. A method config instance
2. An array of method config instance
Example:
`javascript
module.exports = [
{
name: 'sayHello',
method: async function (name, gender) {
return 'Hello World, ' + name + ', you are ' + gender;
},
options: {
cache: {
expiresIn: 7 24 60 * 1000,
generateTimeout: 100
},
generateKey: function (name) {
return name;
}
}
},
{
name: 'sayBye',
method: async function (name) {
return 'Bye, ' + name;
}
}
];
`
Note: all method registered before this plugin will also be considered and expose to servername, therefore this is an optional option
If this option is not specified, you need to create method as thunk before register this plugin
`javascript
server.method({
name: 'hello',
method: function (name, next) {
return next(null, 'Hello, ' + name);
}
})
`
Then you can access the async method by server.methodsAsync
`javascript
function(request, reply) {
request.server.methodsAsync.hello('Raymond').then((result) => {
.....
});
}
`Drop Cache
You can drop cache with cache.dropAsync instead of cache.drop
`javascript
function(request, reply) {
request.server.methodsAsync.hello.cache.dropAsync('Raymond').then(() => {
......
});
}
``Please visit the test case for example reference.
Copyright (c) 2016 Sze Ka Wai Raymond
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