2024 年 PHP 日本研討會

    Gearman 基本客戶端和工作端，提交任務

    範例 #1 Gearman 基本客戶端和工作端，提交任務

    在此範例中，基本的反轉客戶端擴充為平行執行兩個任務。反轉工作端保持不變，除了在處理過程中新增資料回傳之外。

    <?php

    # create the gearman client
    $gmc= new GearmanClient();

    # add the default server (localhost)
    $gmc->addServer();

    # register some callbacks
    $gmc->setCreatedCallback("reverse_created");
    $gmc->setDataCallback("reverse_data");
    $gmc->setStatusCallback("reverse_status");
    $gmc->setCompleteCallback("reverse_complete");
    $gmc->setFailCallback("reverse_fail");

    # set some arbitrary application data
    $data['foo'] = 'bar';

    # add two tasks
    $task= $gmc->addTask("reverse", "foo", $data);
    $task2= $gmc->addTaskLow("reverse", "bar", NULL);

    # run the tasks in parallel (assuming multiple workers)
    if (! $gmc->runTasks())
    {
    echo     "ERROR " . $gmc->error() . "\n";
    exit;
    }

    echo     "DONE\n";

    function     reverse_created($task)
    {
    echo     "CREATED: " . $task->jobHandle() . "\n";
    }

    function     reverse_status($task)
    {
    echo     "STATUS: " . $task->jobHandle() . " - " . $task->taskNumerator() .
    "/" . $task->taskDenominator() . "\n";
    }

    function     reverse_complete($task)
    {
    echo     "COMPLETE: " . $task->jobHandle() . ", " . $task->data() . "\n";
    }

    function     reverse_fail($task)
    {
    echo     "FAILED: " . $task->jobHandle() . "\n";
    }

    function     reverse_data($task)
    {
    echo     "DATA: " . $task->data() . "\n";
    }

    ?>
    <?php

    echo "Starting\n";

    # Create our worker object.
    $gmworker= new GearmanWorker();

    # Add default server (localhost).
    $gmworker->addServer();

    # Register function "reverse" with the server. Change the worker function to
    # "reverse_fn_fast" for a faster worker with no output.
    $gmworker->addFunction("reverse", "reverse_fn");

    print     "Waiting for job...\n";
    while(    $gmworker->work())
    {
    if (    $gmworker->returnCode() != GEARMAN_SUCCESS)
    {
    echo     "return_code: " . $gmworker->returnCode() . "\n";
    break;
    }
    }

    function     reverse_fn($job)
    {
    echo     "Received job: " . $job->handle() . "\n";

    $workload = $job->workload();
    $workload_size = $job->workloadSize();

    echo     "Workload: $workload ($workload_size)\n";

    # This status loop is not needed, just showing how it works
    for ($x= 0; $x < $workload_size; $x++)
    {
    echo     "Sending status: " . ($x + 1) . "/$workload_size complete\n";
    $job->sendStatus($x+1, $workload_size);
    $job->sendData(substr($workload, $x, 1));
    sleep(1);
    }

    $result= strrev($workload);
    echo     "Result: $result\n";

    # Return what we want to send back to the client.
    return $result;
    }

    # A much simpler and less verbose version of the above function would be:
    function reverse_fn_fast($job)
    {
    return     strrev($job->workload());
    }

    ?>

    以上範例將輸出類似以下的內容

    % php reverse_worker.php
Starting
Waiting for job...
Received job: H:foo.local:45
Workload: foo (3)
1/3 complete
2/3 complete
3/3 complete
Result: oof
Received job: H:foo.local:44
Workload: bar (3)
1/3 complete
2/3 complete
3/3 complete
Result: rab

    % php reverse_client_task.php
CREATED: H:foo.local:44
CREATED: H:foo.local:45
STATUS: H:foo.local:45 - 1/3
DATA: f
STATUS: H:foo.local:45 - 2/3
DATA: o
STATUS: H:foo.local:45 - 3/3
DATA: o
COMPLETE: H:foo.local:45, oof
STATUS: H:foo.local:44 - 1/3
DATA: b
STATUS: H:foo.local:44 - 2/3
DATA: a
STATUS: H:foo.local:44 - 3/3
DATA: r
COMPLETE: H:foo.local:44, rab
DONE

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    ＋新增註記

    使用者貢獻的註記 1 則註記

    1
    septerrianin at mail dot ru
    6 年前
    注意事項。
    註冊回呼函式需要在新增任務**之前**完成。

    以下範例**無法正常運作**
    <?php
    # 新增任務
    $task= $gmc->addTask("reverse", "foo", $data);

    # 註冊一些回呼函式
    $gmc->setCreatedCallback("reverse_created");
    $gmc->setDataCallback("reverse_data");
    $gmc->setStatusCallback("reverse_status");
    $gmc->setCompleteCallback("reverse_complete");
    $gmc->setFailCallback("reverse_fail");

    # 執行任務
    $gmc->runTasks();
    ?>
    ＋新增註記
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