Archive: Namaste PHP AMQP framework v1.0 (2017-2020)
952 days continuous production uptime, 40k+ tp/s single node. Original corpo Bitbucket history not included — clean archive commit.
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449
brokers/whBroker.php
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449
brokers/whBroker.php
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<?php
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/**
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* whBroker.php
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*
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* This is the Namaste Warehouse broker which, by design, should be running on segundo, separately from both the
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* Appserver (namaste) and the admin services.
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*
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* Warehousing accepts requests from Namaste because we want writes to happen "locally" to this service.
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*
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* Warehousing is intended to support the following data transitions:
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*
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* COOL --> data is moved from HOT storage to COOL storage meaning that the original format of the data is preserved.
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* COLD --> data is moved from HOT or COOL storage to COLD storage -- which is TBD and is expected to be a CSV type
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* format using on of the AWS Storage-as-a-Service options.
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* WARM --> data is moved COLD to COOL storage. (so that it can be queried)
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* HOT --> data is moved COOL or COLD to HOT storage. (data de-archiving/recovery)
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*
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* For design notes, please refer to Jira case INF-188.
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*
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* This is a non-blocking RPC broker. Once a request is received from Namaste, we validate the request. If the
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* request passed validation and verification, then we'll immediately return a tracking GUID back to Namaste while
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* starting the migration process. The client has the responsibility to monitor the wareHousing record (created in
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* the ADMIN service database) progress and completion status. The GUID returned back to Namaste is the data
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* wareHousing record GUID.
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*
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*
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* @author mike@givingassistant.org
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* @version 1.0.0
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*
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* HISTORY:
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* ========
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* 04-10-18 mks INF-201: Original coding (begins)
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* 05-31-18 mks CORE-1011: update for new XML broker services configuration
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* 06-07-18 mks CORE-1013: remote-fetch event added
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* 07-09-18 mks CORE-1017: pedigree fetch event added
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* 07-28-20 mks DB-156: broker self-registration installed
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*
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*/
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use PhpAmqpLib\Connection\AMQPStreamConnection;
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use PhpAmqpLib\Channel\AMQPChannel;
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use /** @noinspection PhpUnusedAliasInspection */ PhpAmqpLib\Message\AMQPMessage;
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use /** @noinspection PhpUnusedAliasInspection */ PhpAmqpLib\Exception\AMQPTimeoutException;
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pcntl_async_signals(true); // enable asynchronous signal handling (PHP 7.1)
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$myPid = getmypid();
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$_REDIRECT = true;
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$topDir = dirname(__DIR__);
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$thisWatcher = basename(__FILE__);
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$thisWatcher = rtrim($thisWatcher, ".php");
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// load the framework
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@require_once($topDir . '/config/sneakerstrap.inc'); // can't be constants b/c this loads the constants
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$res = 'DATW: '; // dat warehouse
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$childrenPidList = null;
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$pidDir = $topDir . DIR_PIDS;
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$eos = (isset($_SERVER['HTTP_USER_AGENT'])) ? '<br />' : PHP_EOL;
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// event management for children
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$whServiceSettings = gasConfig::$settings[CONFIG_BROKER_SERVICES][CONFIG_BROKER_WH];
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$numberChildren = $whServiceSettings[CONFIG_BROKER_INSTANCES][CONFIG_BROKER_WH_BROKER];
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$requestsPerInstance = (empty($whServiceSettings[CONFIG_BROKER_REQUEST_LIMIT])) ? NUMBER_C : $whServiceSettings[CONFIG_BROKER_REQUEST_LIMIT];
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$numberChildren = ($numberChildren < 1) ? 1 : $numberChildren; // todo -- should this be = 2??
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$runningBrokers = $numberChildren;
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$requestCounter = 0;
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$myRequestsPerInstance = 0;
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$startingMemory = 0;
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// create the root guid
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$groot = rtrim($res, COLON) . UDASH . guid(); // root guid
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consoleLog($res, CON_SUCCESS, sprintf(INFO_BROKER_STARTUP, substr(basename(__FILE__), 0, -4), $groot));
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consoleLog($res, CON_SUCCESS, sprintf(INFO_BROKER_NUM_CHILD, substr(basename(__FILE__), 0, -4), $numberChildren));
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/** @var gacErrorLogger $parentLog */
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$parentLog = new gacErrorLogger();
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// todo - validate the broker environment as declared in the XML config
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// get the location of the broker is supposed to be run
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$brokerLocation = ENV_SEGUNDO;
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if (!empty($argv) and !empty($argv[1])) {
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$brokerLocation = $argv[1];
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}
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$errors = null;
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$file = rtrim(basename(__FILE__), DOT . FILE_TYPE_PHP);
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$service = ENV_SEGUNDO;
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if (!validateService($service, $errors)) {
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$hdr = sprintf(INFO_LOC, $file, __LINE__);
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$msg = sprintf(ERROR_SERVICE_REG, $file, $service);
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$parentLog->fatal($hdr . $msg);
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$parentLog->__destruct();
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unset($parentLog);
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exit(1);
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}
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//////////////////////////////////////////////////////////////////////////////////
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// set-up the replacement signal handler that will be called on a child's death //
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//////////////////////////////////////////////////////////////////////////////////
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function sigHandler($_sig) {
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global $numberChildren;
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switch ($_sig) {
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case SIGCHLD :
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$numberChildren--;
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while (($pid = pcntl_wait($_sig, WNOHANG)) > 0) {
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@pcntl_wexitstatus($_sig);
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}
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break;
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}
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}
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pcntl_signal(SIGCLD, 'sigHandler');
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/////////////////////////////////////////////////////////////////////////////////////////
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// set-up the forking function so that it can be called initially or on a SIGCLD event //
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/////////////////////////////////////////////////////////////////////////////////////////
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function forkMe()
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{
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global $thisWatcher, $eos, $res, $parentLog, $requestsPerInstance, $startingMemory, $myRequestsPerInstance, $groot, $file;
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$startingMemory = memory_get_usage(true);
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$myRequestsPerInstance = $requestsPerInstance + (mt_rand(0, 2) * 10) + mt_rand(1, 9);
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$thisPid = pcntl_fork();
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switch ($thisPid) {
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case -1 : // error
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$cmsg = ERROR_FORK_FAILED . $thisWatcher;
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$parentLog->fatal($cmsg);
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die(getDateTime() . CON_ERROR . $res . $cmsg . $eos);
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break;
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case 0 : // child (broker daemon)
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try {
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// replace the sigcld signal handler
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pcntl_signal(SIGCLD, SIG_DFL);
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$thisPid = getmypid();
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// create the child logger object
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/** @var gacErrorLogger $childLog */
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$childLog = new gacErrorLogger();
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// generate a child guid for the forked child...
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$childGUID = rtrim($res, COLON) . UDASH . guid();
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// toss the childGUID unto cache because it does not propagate down to the callback method
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gasCache::sysAdd(($groot . UDASH . $thisPid), $childGUID);
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$queue = gasConfig::$settings[CONFIG_BROKER_SERVICES][CONFIG_BROKER_QUEUE_TAG] . BROKER_QUEUE_WH;
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/** @var AMQPStreamConnection $brokerConnection */
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$brokerConnection = gasResourceManager::fetchResource(RESOURCE_SEGUNDO);
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if (is_null($brokerConnection)) {
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$childLog->fatal(ERROR_RESOURCE_404 . RESOURCE_SEGUNDO . COLON . BROKER_QUEUE_WH);
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consoleLog($res, CON_ERROR . ERROR_RESOURCE_404 . RESOURCE_SEGUNDO . COLON . BROKER_QUEUE_WH);
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exit(1); // shell-script exit value for fail
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}
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$brokerChannel = $brokerConnection->channel();
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// params: queue name, passive, durable, exclusive, auto-delete
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$brokerChannel->queue_declare($queue, BROKER_QUEUE_DECLARE_PASSIVE, false, false, true);
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} catch (PhpAmqpLib\Exception\AMQPRuntimeException | Throwable $t) {
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$hdr = sprintf(INFO_LOC, $file, __LINE__);
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@handleExceptionMessaging($hdr, $t->getMessage(), $foo, true);
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exit(1);
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}
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// register the child-spawn event
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$data = [
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SYSTEM_EVENT_NAME => SYSEV_NAME_CHILD_REG,
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SYSTEM_EVENT_TYPE => SYSEV_TYPE_BROKER,
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SYSTEM_EVENT_BROKER_ROOT_GUID => $groot,
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SYSTEM_EVENT_BROKER_GUID => $childGUID,
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SYSTEM_EVENT_KEY => SYSEV_CHILD_RPI,
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SYSTEM_EVENT_VAL => $myRequestsPerInstance,
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SYSTEM_EVENT_CODE_LOC => basename(__FILE__) . COLON . __LINE__
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];
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@postSystemEvent($data, $childGUID, $childLog);
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register_shutdown_function(BROKER_SHUTDOWN_FUNCTION, $brokerChannel, $brokerConnection, $res);
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$callback = function($_request)
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{
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$startTime = gasStatic::doingTime();
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$postNormalResponse = true;
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/** @var AMQPChannel $brokerChannel */
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global $brokerChannel;
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/** @var AMQPStreamConnection $brokerConnection */
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global $brokerConnection;
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global $requestCounter, $res, $eos, $myRequestsPerInstance, $startingMemory, $groot, $service, $file;
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$event = BROKER_QUEUE_M . '(';
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$requestCounter++;
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$aryRetData = null;
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$retData = null;
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$errorStack = [];
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$request = null;
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$eos = (isset($_SERVER['HTTP_USER_AGENT'])) ? '<br />' : PHP_EOL;
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$eventSuccess = false;
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$conMsg = '';
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$eventGUID = guid();
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$thisPid = getmypid();
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$eventTimer = false; // certain events will toggle to true to log timer recording for the broker event
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$childGUID = gasCache::sysGet(($groot . UDASH . getmypid()));
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// set-up the call-back logger
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/** @var gacErrorLogger $callBackLog */
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$callBackLog = new gacErrorLogger($eventGUID);
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try {
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if (!firstPassPayloadValidation($_request, $service, $msg, $request, $eventGUID)) {
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$conMsg = $msg;
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$callBackLog->info($msg);
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$aryRetData = buildReturnPayload([false, STATE_FAIL, null, $msg, null]);
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$event .= ERROR_DATA_VALIDATION_FIRST_PASS . ')';
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} elseif (!validateMetaData($request, $errorStack)) {
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for ($index = 0, $last = count($errorStack); $index < $last; $index++) {
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$conMsg .= $errorStack[$index] . $eos;
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$callBackLog->error($errorStack[$index]);
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}
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$conMsg = rtrim($conMsg, $eos);
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$aryRetData = buildReturnPayload([false, STATE_META_ERROR, $errorStack, null, null]);
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$event .= ERROR_META_VALIDATION_SECOND_PASS . ')';
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} else {
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$event .= $request[BROKER_REQUEST] . ')';
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if (is_null($request)) {
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consoleLog($res, CON_ERROR, ERROR_REQUEST_404);
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}
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switch ($request[BROKER_REQUEST]) {
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case BROKER_REQUEST_SHUTDOWN :
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$_request->delivery_info[BROKER_CHANNEL]->basic_cancel($_request->delivery_info[BROKER_DELIVERY_TAG]);
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$conMsg = SUCCESS_SHUTDOWN;
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$aryRetData = buildReturnPayload([true, STATE_SUCCESS, null, BROKER_REQUEST_SHUTDOWN, null]);
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$eventSuccess = true;
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break;
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// test broker responsiveness
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case BROKER_REQUEST_PING :
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$conMsg = SUCCESS_PING . BROKER_QUEUE_WH;
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$aryRetData = buildReturnPayload([true, STATE_SUCCESS, null, (SUCCESS_PING . BROKER_QUEUE_WH), null]);
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$eventSuccess = true;
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break;
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case BROKER_REQUEST_PEDIGREE :
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$conMsg = SUCCESS_EVENT . BROKER_REQUEST_PEDIGREE;
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$aryRetData = buildReturnPayload([true, STATE_SUCCESS, null, gasConfig::getPedigree()]);
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$eventSuccess = true;
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break;
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case BROKER_REQUEST_WAREHOUSE :
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$eventSuccess = false;
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$eventTimer = false;
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$objMigrate = new gacMigrations($request[BROKER_DATA], $request[BROKER_META_DATA], EVENT_WAREHOUSE);
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if (!$objMigrate->status) {
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$conMsg = FAIL_EVENT . BROKER_REQUEST_WAREHOUSE;
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$aryRetData = buildReturnPayload([false, $objMigrate->state, $objMigrate->errorStack, null]);
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} else {
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$guid = $objMigrate->objWarehouseMeta->getColumn(DB_TOKEN);
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// validate return guid
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if (!validateGUID($guid)) {
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$conMsg = ERROR_EVENT . BROKER_REQUEST_WAREHOUSE;
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$aryRetData = buildReturnPayload([ false, FAIL_EVENT, $objMigrate->errorStack, ERROR_BROKER_REQUEST_FAILED]);
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} else {
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$conMsg = SUCCESS_EVENT . BROKER_REQUEST_WAREHOUSE;
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$aryRetData = buildReturnPayload([true, SUCCESS_EVENT, $objMigrate->errorStack, $guid]);
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$eventSuccess = true;
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}
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// send the guid back to the calling client now so we can resume the warehousing...
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postResponse($aryRetData, $_request, $callBackLog, $res);
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$postNormalResponse = false;
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// dive back into the objMigration class and perform the warehouse request
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if (!$objMigrate->whData()) {
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$conMsg = FAIL_EVENT . BROKER_REQUEST_WAREHOUSE;
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} else {
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$conMsg = SUCCESS_EVENT . BROKER_REQUEST_WAREHOUSE;
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$eventSuccess = true;
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}
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}
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break;
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case BROKER_REQUEST_REMOTE_FETCH :
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$eventTimer = true;
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$errors = [];
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/** @var gacMongoDB $tmpObj */
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if (is_null($tmpObj = grabWidget($request[BROKER_META_DATA], '', $errors))) {
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foreach ($errors as $error)
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$callBackLog->error($error);
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} else {
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$tmpObj->_fetchRecords($request[BROKER_DATA]);
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if ($tmpObj->status) {
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$eventSuccess = true;
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$tmpObj->eventMessages[] = STRING_REC_COUNT_RET . $tmpObj->recordsReturned;
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$conMsg = SUCCESS_EVENT . BROKER_REQUEST_FETCH;
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$queryMeta = [
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STRING_REC_COUNT_RET => $tmpObj->recordsReturned,
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STRING_REC_COUNT_TOT => $tmpObj->recordsInCollection
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];
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// recordsInQuery is a PDO thing so let's see if it exists in the class object
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if (isset($tmpObj->recordsInQuery) and $tmpObj->recordsInQuery) {
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$queryMeta[STRING_REC_COUNT_QUERY] = $tmpObj->recordsInQuery;
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}
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if (isset($request[BROKER_META_DATA][META_DONUT_FILTER]) and $request[BROKER_META_DATA][META_DONUT_FILTER] == 1) {
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$queryResults = $tmpObj->getData();
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} elseif ($tmpObj->useCache or (isset($request[BROKER_META_DATA][META_DO_CACHE]) and $request[BROKER_META_DATA][META_DO_CACHE])) {
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// todo - this is supposed to return the list of cache keys, or the single reference cache key - fix!
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$queryResults = $tmpObj->cacheMap;
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} else {
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$queryResults = $tmpObj->getData();
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}
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$retData = [STRING_QUERY_RESULTS => $queryResults, STRING_QUERY_DATA => $queryMeta];
|
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$aryRetData = buildReturnPayload([true, STATE_SUCCESS, $tmpObj->eventMessages, $retData]);
|
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} else {
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$conMsg = FAIL_EVENT . BROKER_REQUEST_FETCH;
|
||||
$aryRetData = buildReturnPayload([false, $tmpObj->state, $tmpObj->eventMessages, null]);
|
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}
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if (is_object($tmpObj)) $tmpObj->__destruct();
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||||
unset($tmpObj);
|
||||
}
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||||
break;
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default :
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$msg = ERROR_EVENT_404 . $request[BROKER_REQUEST];
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$conMsg = $msg;
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||||
$aryRetData = buildReturnPayload([false, STATE_DOES_NOT_EXIST, $msg, null]);
|
||||
break;
|
||||
}
|
||||
}
|
||||
} catch (Throwable $t) {
|
||||
$hdr = sprintf(INFO_LOC, $file, __LINE__);
|
||||
@handleExceptionMessaging($hdr, $t->getMessage(), $foo, true);
|
||||
$aryRetData = buildReturnPayload([false, STATE_FRAMEWORK_FAIL, $t->getMessage(), $errorStack]);
|
||||
}
|
||||
|
||||
// ensure we have a return-payload and a console message
|
||||
if (empty($aryRetData) and $postNormalResponse) {
|
||||
$msg = ERROR_NO_RET_DATA . '-' . __FILE__ . '-' . $request[BROKER_REQUEST];
|
||||
$conMsg = BROKER_QUEUE_M . ' - ' . $msg;
|
||||
$aryRetData = buildReturnPayload([false, STATE_FRAMEWORK_FAIL, null, $msg, null]);
|
||||
} elseif ($eventSuccess and empty($conMsg)) {
|
||||
$callBackLog->warn(ERROR_NO_CON_MSG);
|
||||
$conMsg = $request[BROKER_REQUEST] . ' - ' . STATE_SUCCESS;
|
||||
}
|
||||
|
||||
// prepare and send the return payload if we've not already sent it...
|
||||
if ($postNormalResponse)
|
||||
postResponse($aryRetData, $_request, $callBackLog, $res);
|
||||
|
||||
// if the event processing failed, reject the message, otherwise ack removing it from the queue
|
||||
// todo: core-452: publish the event payload to the sysEvent broker to capture the failed event
|
||||
|
||||
consoleLog($res, (($eventSuccess) ? CON_SUCCESS : CON_ERROR), $conMsg . sprintf(ERROR_EVENT_COUNT,$requestCounter, $myRequestsPerInstance));
|
||||
unset($msg);
|
||||
|
||||
// publish event metrics if we've toggled the switch on
|
||||
if ($eventTimer) {
|
||||
// get the broker-event processing time
|
||||
$eventTime = gasStatic::doingTime($startTime);
|
||||
$data = [
|
||||
SYSTEM_EVENT_NAME => SYSEV_NAME_EVENT_TIMER,
|
||||
SYSTEM_EVENT_TYPE => SYSEV_TYPE_BROKER,
|
||||
SYSTEM_EVENT_BROKER_ROOT_GUID => $groot,
|
||||
SYSTEM_EVENT_BROKER_GUID => $childGUID,
|
||||
DB_EVENT_GUID => $eventGUID,
|
||||
SYSTEM_EVENT_COUNT => $requestCounter,
|
||||
SYSTEM_EVENT_COUNT_TOTAL => $myRequestsPerInstance,
|
||||
SYSTEM_EVENT_TIMER => $eventTime,
|
||||
SYSTEM_EVENT_BROKER_EVENT => $event,
|
||||
SYSTEM_EVENT_META_DATA => $request[BROKER_META_DATA],
|
||||
SYSTEM_EVENT_CODE_LOC => basename(__FILE__) . COLON . __LINE__
|
||||
];
|
||||
if (!empty($childGUID)) $data[SYSTEM_EVENT_OGUID] = $childGUID;
|
||||
@postSystemEvent($data, $childGUID, $callBackLog);
|
||||
}
|
||||
|
||||
// exit the child if we've reached the request limit
|
||||
if ($requestCounter >= $myRequestsPerInstance) {
|
||||
if (getmypid() == $thisPid) {
|
||||
$meta = [
|
||||
META_SESSION_IP => STRING_SESSION_HOME,
|
||||
META_SESSION_DAEMON => 1,
|
||||
META_SESSION_MISC => INFO_BROKER_RECYCLE,
|
||||
META_EVENT_GUID => $eventGUID
|
||||
];
|
||||
$data = [
|
||||
SYSTEM_EVENT_NAME => SYSEV_NAME_BROKER_RECYCLE,
|
||||
SYSTEM_EVENT_TYPE => SYSEV_TYPE_BROKER,
|
||||
SYSTEM_EVENT_BROKER_ROOT_GUID => $groot,
|
||||
SYSTEM_EVENT_BROKER_GUID => $childGUID,
|
||||
DB_EVENT_GUID => $eventGUID,
|
||||
SYSTEM_EVENT_START => $startingMemory,
|
||||
SYSTEM_EVENT_PEAK => memory_get_peak_usage(true),
|
||||
SYSTEM_EVENT_END => memory_get_usage(true),
|
||||
SYSTEM_EVENT_BROKER_EVENT => $event,
|
||||
SYSTEM_EVENT_COUNT => $requestCounter,
|
||||
SYSTEM_EVENT_COUNT_TOTAL => $myRequestsPerInstance,
|
||||
SYSTEM_EVENT_META_DATA => $meta,
|
||||
SYSTEM_EVENT_CODE_LOC => basename(__FILE__) . COLON . __LINE__
|
||||
];
|
||||
@postSystemEvent($data, $eventGUID, $callBackLog);
|
||||
}
|
||||
consoleLog($res, CON_SYSTEM, INFO_BROKER_REQ_COUNT);
|
||||
if (is_object($brokerChannel)) $brokerChannel->close();
|
||||
if (is_object($brokerConnection)) $brokerConnection->close();
|
||||
exit(0);
|
||||
}
|
||||
};
|
||||
consoleLog($res, CON_SYSTEM, sprintf(INFO_BROKER_QUEUE_ESTABLISHED, BROKER_QUEUE_WH, $thisPid, $myRequestsPerInstance));
|
||||
$brokerChannel->basic_qos(null, 1, null);
|
||||
$brokerChannel->basic_consume($queue, '', false, false, false, false, $callback);
|
||||
while (count($brokerChannel->callbacks)) {
|
||||
try {
|
||||
$brokerChannel->wait();
|
||||
} catch (Throwable $t) {
|
||||
$hdr = sprintf(INFO_LOC, $file, __LINE__);
|
||||
@handleExceptionMessaging($hdr, $t->getMessage(), $foo, true);
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
||||
case 1 : // parent
|
||||
// does nothing
|
||||
break;
|
||||
}
|
||||
return($thisPid);
|
||||
}
|
||||
|
||||
for ($numBrokers = 0; $numBrokers < $runningBrokers; $numBrokers++) {
|
||||
$childrenPidList[] = forkMe();
|
||||
}
|
||||
consoleLog($res, CON_SUCCESS, sprintf(INFO_BROKER_PARENT_STARTED, count($childrenPidList), BROKER_QUEUE_WH));
|
||||
|
||||
// "register" the broker instantiation event
|
||||
$data = [
|
||||
SYSTEM_EVENT_NAME => SYSEV_NAME_GROOT_REG,
|
||||
SYSTEM_EVENT_TYPE => SYSEV_TYPE_BROKER,
|
||||
SYSTEM_EVENT_BROKER_ROOT_GUID => $groot,
|
||||
SYSTEM_EVENT_KEY => STRING_NUMBER_CHILDREN,
|
||||
SYSTEM_EVENT_VAL => $numberChildren,
|
||||
SYSTEM_EVENT_CODE_LOC => basename(__FILE__) . COLON . __LINE__,
|
||||
SYSTEM_EVENT_NOTES => BROKER_SYSEV_REG . rtrim($res, ": ")
|
||||
];
|
||||
@postSystemEvent($data, $groot, $parentLog);
|
||||
|
||||
// the parent process continues to run, waking-up every second to monitor it's children...
|
||||
// when a child dies, it's death-rattle is caught and the child is replaced with a new process.
|
||||
while (count($childrenPidList)) {
|
||||
$lastPid = 0;
|
||||
$newPidList = null;
|
||||
$result = pcntl_waitpid(0, $status); // detect any sigchld from the parent-group
|
||||
if (in_array($result, $childrenPidList)) {
|
||||
$key = array_search($result, $childrenPidList);
|
||||
array_splice($childrenPidList, $key, 1);
|
||||
// process has already exited -- restart it
|
||||
$childrenPidList[] = forkMe();
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user