<?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();
}
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