I've probelem with wait function finish in my code:
function myfucntion1()
{
....
// call sql adapter to get data from database
onSuccess:callfunctionsucc,
onFailure:calfunctionfail
....
}
function callfunctionsucc(data)
{
//foreach in data
// call myfunction3(item)
}
function myfunction3(item)
{
....
// call sql adapter to get data from database
onSuccess:callfunctionsucc2,
onFailure:calfunctionfail2
....
}
function callfunctionsucc2(data)
{
//foreach in data
//and set data to myarr is my global variable
}
function myfunction2()
{
// access to myarr and process it
}
when i call:
var myarr = [];
myfucntion1();
myfunction2();
My problem is in myfunction2(), myarr = 0, because when i run myfunction1 it call callfunctionsucc, but when out of
myfunction1, myfunction2 being call during callfunctionsucc not yet finish.
How i can wait to callfunctionsucc finish then call myfunction2 ? Thanks for any help
A multiple backend request logic like that should be implemented in adapter. Your application should make a single request to adapter. Adapter, in its turn, should make as many requests as required, create a response and send it back to application.
Check out Advanced adapter usage and mashup training and sample at http://www.ibm.com/developerworks/mobile/worklight/getting-started/
Related
UPD. Sorry, guys.
I have an application that acts as a SOAP server, how do I write a PHPUnit test to test it?
SOAP extension is reading data from PHP input stream. You just provide your own data there and create some integration/unit tests for your API.
Take a look at the signature of SoapServer::handle() method. It takes as an argument a string which is a request itself. This parameter is optional and if you don't pass anything in, PHP will just read the data itself. But you can simply override it.
I used streams to do it. First you wrap the SoapServer with your own class like this:
class MyServer
{
/** \SoapServer */
private $soapServer;
public function __construct(\SoapServer $soapServer)
{
$this->soapServer = $soapServer;
}
public function handle(Psr\Http\Message\StreamInterface $inputStream): void
{
$this->soapServer->handle($inputStream->getContent());
}
}
Now you are ready to mock the request.
In your test you can do:
class MyTest extends TestCase
{
public function testMyRequest(): void
{
$mySoapServer = $this->createMySoapServer();
$request = $this->createRequest();
$mySoapServer->handle($request);
}
private function createRequest(): StreamInterface
{
$requestString = '<soap:Envelope></soap:Envelope>';
$fh = fopen('php://temp', 'rw');
fwrite($fh, $requestString);
fseek($fh, SEEK_SET);
return new Psr\Http\Message\StreamInterface\Stream($fh);
}
private function createMySoapServer(): MyServer
{
return new MyServer(new \SoapServer());
}
}
One thing to keep in mind - this test will generate output. You may want to test this output or ignore it. Depends on your use case.
Another side note. What you are asking for has really nothing to do with PHPUnit. It just a matter of designing your SOAP server correctly.
If you are wondering how to set up the stream when you have a live request, this is really simple:
$server->handle(new Psr\Http\Message\StreamInterface\Stream(fopen('php://input', 'r+')));
I want to use Fetch API but i don' t really understand it's mecanism.
I have an in my HTML and i want to assign the result of my fetch with this code :
const weather = "http://api.apixu.com/v1/current.json?key=cba287f271e44f88a60143926172803&q=Paris";
const array = [];
fetch(weather)
.then(blob => blob.json())
.then(data => {
array.push(data.current.humidity)
console.log(array[0])
}
);
document.querySelector('h1').innerHTML = array[0];
i have the result with the console.log but the returns "undefined". can you explain why ?
thanks a lot
This is because the call to the API is asynchronous, meaning that the code is not executed just line by line as you write it. The callback only runs as soon as the call to the API has finished, basically meaning that
data => {
array.push(data.current.humidity)
console.log(array[0])
}
runs after
document.querySelector('h1').innerHTML = array[0];
So when you try to set your h1, array is still empty. If you want to set it as soon the data is available, you have to do it within the callback function:
data => {
array.push(data.current.humidity)
document.querySelector('h1').innerHTML = array[0];
}
This might seem weird at first, but keep in mind that you're only registering an anonymous function but not running it yet. You just define the function that you want to trigger as soon as something happens, in this case: when your API call has finished.
Here is a question on the Caching Proxy design pattern.
Is it possible to create with PHP a dynamic Proxy Caching implementation for automatically adding cache behaviour to any object?
Here is an example
class User
{
public function load($login)
{
// Load user from db
}
public function getBillingRecords()
{
// a very heavy request
}
public function computeStatistics()
{
// a very heavy computing
}
}
class Report
{
protected $_user = null;
public function __construct(User $user)
{
$this->_user = $user;
}
public function generate()
{
$billing = $this->_user->getBillingRecords();
$stats = $this->_user->computeStatistics();
/*
...
Some rendering, and additionnal processing code
...
*/
}
}
you will notice that report will use some heavy loaded methods from User.
Now I want to add a cache system.
Instead of designing a classic caching system, I just wonder if it is possible to implement a caching system in a proxy design pattern with this kind of usage:
<?php
$cache = new Cache(new Memcache(...));
// This line will create an object User (or from a child class of User ex: UserProxy)
// each call to a method specified in 3rd argument will use the configured cache system in 2
$user = ProxyCache::create("User", $cache, array('getBillingRecords', 'computeStatistics'));
$user->load('johndoe');
// user is an instance of User (or a child class) so the contract is respected
$report = new report($user)
$report->generate(); // long execution time
$report->generate(); // quick execution time (using cache)
$report->generate(); // quick execution time (using cache)
each call to a proxyfied method will run something like:
<?php
$key = $this->_getCacheKey();
if ($this->_cache->exists($key) == false)
{
$records = $this->_originalObject->getBillingRecords();
$this->_cache->save($key, $records);
}
return $this->_cache->get($key);
Do you think it is something we could do with PHP? do you know if it is a standard pattern? How would you implement it?
It would require to
implement dynamically a new child class of the original object
replace the specified original methods with the cached one
instanciate a new kind of this object
I think PHPUnit does something like this with the Mock system...
You can use the decorator pattern with delegation and create a cache decorator that accepts any object then delegates all calls after it runs it through the cache.
Does that make sense?
I am new to Zend and very keen to learn, so I would really appreciate some help and guidance.
I am trying to create a 'method in a class' that will save the session variables of product pages visited by members to a site i.e
i,e examplesite com/product/?producttype= 6
I want to save the number 6 in a session variable. I also do not want to have a global session for the entire site; I just want it for selected pages. So, I guess I have to have Zend_Session::start() on the selected page; but I am not clear how this should be done.
Should I instantiate it in the page view page. i.e products page or do this in the indexAction() method for the products page. I have attempted to instantiate it below but it did not work.
public function rememberLastProductSearched()
{ //my attempt to start a session start for this particular page.
Zend_Session::start();
}
$session->productSearchCategory = $this->_request->getParam('product-search-category');
return" $session->productSearchCategory ";
}
else
{
//echo " nothing there
return " $session->productSearchCategory";
//";
}
}
With the rememberLastProductSearched() method I was trying to get the method to first check whether the user had searched for a new product or just arrived at the page by default. i.e whether he had used the get() action to search for a new product. If the answer is no, then I wanted the system to check whether their had been a previous saved session variable. so in procedural syntax it would have gone like this:
if(isset($_Get['producttype']))
{
//$dbc database connection
$producttype = mysqli_real_escape_string($dbc,trim($_GET['producttype']));
}
else
if(isset($_SESSION['producttype'])){
$producttype = mysqli_real_escape_string($dbc,trim($_SESSION['producttype']));
}
Can you please help me with the Zend/oop syntax. I am totally confused how it should be?
you're asking about simple work flow in an action, it should begin something like:
//in any controller
public function anyAction()
{
//open seesion, start will be called if needed
$session = new Zend_Session_Namespace('products');
//get value
$productCategory = $this->getRequest()->getParam('producttype');
//save value to namespace
$session->productType = $productCategory;
//...
}
now to move this off to a separate method you have to pass the data to the method...
protected function rememberLastProductSearched($productType)
{
//open seesion, start will be called if needed
$session = new Zend_Session_Namespace('products');
$session->productType = $productType;
}
So now if you want to test for presence of a value...
//in any controller
public function anyAction()
{
//open seesion, call the namespace whenever you need to access it
$session = new Zend_Session_Namespace('products');
if (!isset($session->productType)) {
$productCategory = $this->getRequest()->getParam('producttype');
//save value to session
$this->rememberLastProductSearched($productCategory)
} else {
$productCategory = $session->productType;
}
}
That's the idea.
Be mindful of your work flow as it can sometimes be very simple to inadvertently overwrite your session values.
$session = new Zend_Session_Namespace("productSearch");
if ($this->getRequest()->getParam('producttype')) { //isset GET param ?
$session->productType = $this->getRequest()->getParam('producttype');
$searchedProductType = $session->productType;
} else { //take the session saved value
if ($session->productType) {
$searchedProductType = $session->productType;
}
}
//now use $searchedProductType for your query
I want to save the results from a query using itemFileReadStore into an array called boxes, but the return value is empty (presumably because fetch is run asynchronously).
The gotItems function builds the array as I want it to, but I can't return that back to myself for any use! I could build the rest of my functionality into the gotItems part, but that would make my code unpretty.
How do I return an array for general use in my JavaScript from the gotItems function?
function getContentFile() {
contentStore = new dojo.data.ItemFileReadStore({
url: '../config/content.json',
preventCache : true
});
var boxes = new Array();
contentStore.fetch({query: {partner : 'enabled'}, onItem: gotItems });
return boxes;
}
function gotItems(item ) {
boxes.push( contentStore.getValue(item,'title') );
console.log( boxes );
return boxes;
}
dojo.addOnLoad( function() {
boxes = getContentFile();
console.log(boxes);
fadeIn('header', 500, 0);
});
Welcome to the world of asynchronous operations.
You'll need to do it with the "continuation-style" programming. ItemFileReadStore's fetch operations is asynchronous -- as you already know by passing the gotItems continuation to it.
contentStore.fetch({query: {partner : 'enabled'}, onItem: gotItems }) will return immediately. Your boxes will be empty at that point (because JavaScript is single-threaded). gotItems is executed after data arrived and subsequent to the function passed to dojo.addOnLoad returning.
You have to put your handling code:
console.log(boxes);
fadeIn('header', 500, 0);
inside the continuation gotItems itself. For example, something like:
function gotItems(item ) {
var boxes = [];
dojo.forEach(item, function(box) {
boxes.push( contentStore.getValue(box,'title') );
});
console.log(boxes); // You probably need to store "boxes" somewhere instead of just logging it
fadeIn('header', 500, 0);
}
Also, the data passed to onItems is an array, so you need to iterate it.
You don't have access to the results when the function returns because as you guessed, the fetch operation executes asynchronously.
You can either put the code that uses the results in your gotItems() function (as answered by Stephen), or you can use Deferreds and Promises. IMHO, that's a better alternative since it lets you organize your code better (once you get used to the idioms of dealing with promises, the code reads more naturally) and it allows you to transparently execute both synchronous and asynchronous operations.
See these two Dojo tutorials on the subject.
In your case, a possible solution involving deferreds would read like:
function getContentFile() {
contentStore = new dojo.data.ItemFileReadStore({
url: '../config/content.json',
preventCache: true
});
var dfd = new dojo.Deferred();
var boxes = new Array();
contentStore.fetch({
query: { partner : 'enabled' },
onItem: function(item) {
boxes.push( contentStore.getValue(item,'title') );
},
onComplete: function() {
// resolve the promise and execute the function in then()
dfd.callback(boxes);
}
});
return dfd;
}
dojo.addOnLoad( function() {
getContentFile().then(function(boxes) {
console.log(boxes);
fadeIn('header', 500, 0);
});
});