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File: example.php

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  Classes of Yasir Siddiqui  >  PHP Circuit Breaker class  >  example.php  >  Download  
File: example.php
Role: Example script
Content type: text/plain
Description: Example script
Class: PHP Circuit Breaker class
Test if a service is ready checking status first
Author: By
Last change:
Date: 2 years ago
Size: 2,607 bytes
 

Contents

Class file image Download
<?php
/**
 * PHP implementation of Circuit breaker design pattern
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

include_once 'CircuitBreakerClass.php';

echo
"Mysql Circuit Breaker";
try {
   
$cb = new CircutBreaker("mysql");
   
   
// Check circuit is closed?
   
if($cb->isCircuitClose()) {
       
        echo
"<br>Mysql Circuit is close so we can continue our operation";
       
       
$mysqli = @ new mysqli("localhost", "username", "password", "databasename");
       
        if (
$mysqli->connect_errno) {
           
            echo
"<br>Mysql Connection to server failed. Please try again later";
           
//Tell circuit breaker about failure
           
$cb->serviceFailed();
        }
        else {
           
           
//Tell circuit breaker about success
           
$cb->serviceSuccess();
        }
    }
    else {
       
        echo
"We are having problems please try again later";
    }
}
catch (
Exception $e) {
   
    echo
"Exception: ".$e->getMessage();
}

echo
"<br>===============================================================";
echo
"<br> Twitter Circuit Breaker";

try {
   
   
$twcb = new CircutBreaker("twittersearch");
   
   
// check circut is closed?
   
if($twcb->isCircuitClose()) {
   
        echo
"<br>Twitter Circuit is close so we can continue our operation";
       
       
$twitterurl = 'http://search.twitter.com/search.json?q=birthday';
       
$response = file_get_contents($twitterurl);
        if(
$response == false) {
           
            echo
"<br>No response from Twitter. Please try agian later!";
           
//Tell circuit breaker about failure
           
$twcb->serviceFailed();
        }
        else {
           
           
// decode response from twitter
           
$jsondata = @json_decode($response);

            if(
$jsondata == false) {
               
                echo
"<br>Parsing error. Twitter search failed Please try agian later!";
               
//Tell circuit breaker about failure
               
$twcb->serviceFailed();
            }
            else {
               
                echo
"<br>Got response from twitter Hurrayyyyyy";
               
//Tell circuit breaker about success
               
$twcb->serviceSuccess();
            }
           
        }
       
    }
    else {
   
        echo
"We are having problems please try again later";
    }
   
}
catch (
Exception $e) {
   
    echo
"Exception: ".$e->getMessage();
}