PHP code example of swoole / etcd-client

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

    

swoole / etcd-client example snippets

$greeterClient = new GreeterClient('127.0.0.1:50051');
$request = new HelloRequest();
$request->setName('Swoole');
list($reply, $status) = $greeterClient->SayHello($request);
$message = $reply->getMessage();
echo "{$message}\n"; // Output: Hello Swoole

use Swoole\Coroutine;

Coroutine::create(function () {
    $kvClient = new Etcdserverpb\KVClient(GRPC_SERVER_DEFAULT_URI);
    $request = new Etcdserverpb\PutRequest();
    $request->setPrevKv(true);
    $request->setKey('Hello');
    $request->setValue('Swoole');
    [$reply, $status] = $kvClient->Put($request);
    if ($status === 0) {
        echo "{$reply->getPrevKv()->getKey()}\n";
        echo "{$reply->getPrevKv()->getValue()}\n";
    } else {
        echo "Error#{$status}: {$reply}\n";
    }
    $kvClient->close();
});

use Etcdserverpb\WatchCreateRequest;
use Etcdserverpb\WatchCreateRequest\FilterType;
use Etcdserverpb\WatchRequest;
use Swoole\Coroutine;

// The Watcher
Coroutine::create(function () {
    $watchClient = new Etcdserverpb\WatchClient(GRPC_SERVER_DEFAULT_URI);

    $watchCall = $watchClient->Watch();
    $request = new WatchRequest();
    $createRequest = new WatchCreateRequest();
    $createRequest->setKey('Hello');
    $request->setCreateRequest($createRequest);

    _retry:
    $watchCall->push($request);
    /**@var $reply Etcdserverpb\WatchResponse */
    while (true) {
        [$reply, $status] = $watchCall->recv();
        if ($status === 0) { // success
            if ($reply->getCreated() || $reply->getCanceled()) {
                continue;
            }
            foreach ($reply->getEvents() as $event) {
                /**@var $event Mvccpb\Event */
                $type = $event->getType();
                $kv = $event->getKv();
                if (FilterType::NOPUT === $type) {
                    echo "Put key {$kv->getKey()} => {$kv->getValue()}\n";
                    break;
                } elseif (FilterType::NODELETE === $type) {
                    echo "Delete key {$kv->getKey()}\n";
                    break;
                }
            }
        } else { // failed
            static $retry_time = 0;
            if ($watchClient->isConnected()) {
                $retry_time++;
                echo "Retry#{$retry_time}\n";
                goto _retry;
            } else {
                echo "Error#{$status}: {$reply}\n";
                break;
            }
        }
    }
    $watchClient->close();
});

// The Writer Put and Delete
Coroutine::create(function () {
    $kvClient = new Etcdserverpb\KVClient(GRPC_SERVER_DEFAULT_URI);
    Coroutine::create(function () use ($kvClient) {
        $request = new Etcdserverpb\PutRequest();
        $request->setKey('Hello');
        $request->setPrevKv(true);
        while (true) {
            static $count = 0;
            Coroutine::sleep(.5);
            $request->setValue('Swoole#' . (++$count));
            [$reply, $status] = $kvClient->Put($request);
            if ($status !== 0) {
                echo "Error#{$status}: {$reply}\n";
                break;
            }
        }
        $kvClient->close();
    });
    Coroutine::create(function () use ($kvClient) {
        $request = new Etcdserverpb\DeleteRangeRequest();
        $request->setKey('Hello');
        $request->setPrevKv(true);
        while (true) {
            Coroutine::sleep(1);
            [$reply, $status] = $kvClient->DeleteRange($request);
            if ($status !== 0) {
                echo "Error#{$status}: {$reply}\n";
                break;
            }
        }
        $kvClient->close();
    });
});

use Swoole\Coroutine;

Coroutine::create(function () {
    $grpcClient = new Grpc\Client(GRPC_SERVER_DEFAULT_URI);
    // use in different type clients

    Coroutine::create(function () use ($grpcClient) {
        $kvClient = new Etcdserverpb\KVClient(GRPC_SERVER_DEFAULT_URI, ['use' => $grpcClient]);
        $request = new Etcdserverpb\PutRequest();
        $request->setPrevKv(true);
        $request->setKey('Hello');
        $request->setValue('Swoole');
        [$reply, $status] = $kvClient->Put($request);
        if ($status === 0) {
            echo "\n=== PUT KV OK ===\n";
        } else {
            echo "Error#{$status}: {$reply}\n";
        }
    });

    Coroutine::create(function () use ($grpcClient) {
        $authClient = new Etcdserverpb\AuthClient(GRPC_SERVER_DEFAULT_URI, ['use' => $grpcClient]);

        $userRequest = new Etcdserverpb\AuthUserAddRequest();
        $userNames = ['ranCoroutine::create', 'twosee', 'gxh', 'stone', 'sjl'];
        foreach ($userNames as $username) {
            $userRequest->setName($username);
            [$reply, $status] = $authClient->UserAdd($userRequest);
            if ($status !== 0) {
                goto _error;
            }
        }

        $useListRequest = new Etcdserverpb\AuthUserListRequest();
        [$reply, $status] = $authClient->UserList($useListRequest);
        if ($status !== 0) {
            goto _error;
        }
        echo "\n=== SHOW USER LIST ===\n";
        foreach ($reply->getUsers() as $user) {
            /**@var \Authpb\User */
            echo "* {$user}\n";
        }
        echo "=== SHOW USER LIST OK ===\n";

        $userRequest = new Etcdserverpb\AuthUserDeleteRequest();
        foreach ($userNames as $username) {
            $userRequest->setName($username);
            [$reply, $status] = $authClient->UserDelete($userRequest);
            if ($status !== 0) {
                goto _error;
            }
        }

        if (false) {
            _error:
            echo "Error#{$status}: {$reply}\n";
        }

        echo "\n=== SHOW ALL CLIENT STATS ===\n";
        var_dump(grpc_client_num_stats());
        $grpcClient->close();
    });

});