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javascript - Nashorn 多线程编程

转载 作者:行者123 更新时间:2023-12-02 07:24:03 27 4
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如果下面的代码可以在多线程应用程序中运行,你能帮帮我吗?

这是我的 Java 脚本,将由 Nashorn 评估

var Thread = Java.type("java.lang.Thread");
var referenceNumberValid = "0000";
var referenceNumberInvalid = "0001";

function validate (parameters) {
var isValid = false;
var statusCode;
var referenceNumber = parameters.referenceNumber;
var validateNumber = referenceNumber.substr(0, 7);
var sum = 0;

for (ctr = 0; ctr < validateNumber.length; ctr++) {
sum += parseInt(validateNumber.substr(ctr, 1));
}

var checkDigit = sum % 10;
isValid = parseInt(referenceNumber.substr(7, 1)) == checkDigit;
statusCode = isValid ? referenceNumberValid : referenceNumberInvalid;

print("Thread: " + Thread.currentThread().getId() + ", isValid: " + isValid + ", referenceNumber: " + referenceNumber + ", validateNumber: " + validateNumber + ", sum: " + sum + ", checkDigit: " + checkDigit + ", statusCode" + statusCode);

return statusCode;
}

这就是我创建脚本引擎的方式

ScriptEngine engine = new ScriptEngineManager().getEngineByName("nashorn");
engine.eval(myScript);

使用 Testng 进行测试时没有任何错误

@Test(dataProvider = "validReferenceNumbers", timeOut = 3000)
public final void testValidReferenceNumber(String referenceNumber) throws NoSuchMethodException, ScriptException {
Map<String, String> parameters = new HashMap<>();
parameters.put("referenceNumber", referenceNumber);
Invocable invocable = (Invocable) engine;
Object result = invocable.invokeFunction("validate", parameters);
Assert.assertEquals(statusCode, "000");
}

@DataProvider(name = "validReferenceNumbers")
private Iterator<Object[]> validReferenceNumbers() throws FileNotFoundException {
Iterator<Object[]> testData = null;
// please assume that will be initilized correctly
return testData;
}

测试结果1 - 注意有些数据是重复的

Thread: 10, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 11, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 12, isValid: true, referenceNumber: 17028884, validateNumber: 1702888, sum: 34, checkDigit: 4, statusCode0000
Thread: 13, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 14, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 15, isValid: true, referenceNumber: 17098881, validateNumber: 1709888, sum: 41, checkDigit: 1, statusCode0000
Thread: 16, isValid: true, referenceNumber: 17098881, validateNumber: 1709888, sum: 41, checkDigit: 1, statusCode0000
Thread: 17, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 18, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 19, isValid: true, referenceNumber: 17058887, validateNumber: 1705888, sum: 37, checkDigit: 7, statusCode0000
Thread: 20, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 21, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 22, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 23, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 24, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 25, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 26, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 27, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 28, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 29, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 30, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 31, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 32, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 33, isValid: true, referenceNumber: 17058887, validateNumber: 1705888, sum: 37, checkDigit: 7, statusCode0000
Thread: 34, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 35, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 36, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 37, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 38, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 39, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 40, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 41, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 42, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 43, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 44, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 45, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 46, isValid: true, referenceNumber: 07034880, validateNumber: 0703488, sum: 30, checkDigit: 0, statusCode0000
Thread: 47, isValid: true, referenceNumber: 07034880, validateNumber: 0703488, sum: 30, checkDigit: 0, statusCode0000
Thread: 48, isValid: true, referenceNumber: 07009882, validateNumber: 0700988, sum: 32, checkDigit: 2, statusCode0000

但是如果我将“parallel=true”添加到@DataProvider,我的脚本就会开始失败

@Test(dataProvider = "validReferenceNumbers", timeOut = 3000)
public final void testValidReferenceNumber(String referenceNumber) throws NoSuchMethodException, ScriptException {
Map<String, String> parameters = new HashMap<>();
parameters.put("referenceNumber", referenceNumber);
Invocable invocable = (Invocable) engine;
Object result = invocable.invokeFunction("validate", parameters);
Assert.assertEquals(statusCode, "000");
}

@DataProvider(name = "validReferenceNumbers", parallel=true)
private Iterator<Object[]> validReferenceNumbers() throws FileNotFoundException {
Iterator<Object[]> testData = null;
// please assume that will be initilized correctly
return testData;
}

测试结果2 - 请注意,一些数据被重复以表明相同的引用编号可能在测试期间随机失败

Thread: 29, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 22, isValid: false, referenceNumber: 18058888, validateNumber: 1805888, sum: 1, checkDigit: 1, statusCode0001
Thread: 25, isValid: false, referenceNumber: 18058888, validateNumber: 1805888, sum: 1, checkDigit: 1, statusCode0001
Thread: 21, isValid: true, referenceNumber: 17098881, validateNumber: 1709888, sum: 41, checkDigit: 1, statusCode0000
Thread: 27, isValid: false, referenceNumber: 18028885, validateNumber: 1802888, sum: 1, checkDigit: 1, statusCode0001
Thread: 20, isValid: true, referenceNumber: 17098881, validateNumber: 1709888, sum: 41, checkDigit: 1, statusCode0000
Thread: 26, isValid: true, referenceNumber: 17058887, validateNumber: 1705888, sum: 37, checkDigit: 7, statusCode0000
Thread: 24, isValid: true, referenceNumber: 17028884, validateNumber: 1702888, sum: 34, checkDigit: 4, statusCode0000
Thread: 23, isValid: false, referenceNumber: 18028885, validateNumber: 1802888, sum: 1, checkDigit: 1, statusCode0001
Thread: 28, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 30, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 32, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 34, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 31, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 36, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 38, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 40, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 42, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 44, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 33, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 46, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 48, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 35, isValid: false, referenceNumber: 18058888, validateNumber: 1805888, sum: 30, checkDigit: 0, statusCode0001
Thread: 50, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 37, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 39, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 41, isValid: true, referenceNumber: 17058887, validateNumber: 1705888, sum: 37, checkDigit: 7, statusCode0000
Thread: 52, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 54, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 43, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 45, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 56, isValid: true, referenceNumber: 07009882, validateNumber: 0700988, sum: 32, checkDigit: 2, statusCode0000
Thread: 58, isValid: true, referenceNumber: 07034880, validateNumber: 0703488, sum: 30, checkDigit: 0, statusCode0000
Thread: 47, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 49, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 51, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 53, isValid: true, referenceNumber: 18028885, validateNumber: 1802888, sum: 35, checkDigit: 5, statusCode0000
Thread: 55, isValid: true, referenceNumber: 18058888, validateNumber: 1805888, sum: 38, checkDigit: 8, statusCode0000
Thread: 57, isValid: true, referenceNumber: 07034880, validateNumber: 0703488, sum: 30, checkDigit: 0, statusCode0000

任何人都可以确认我是否可以初始化 ScriptEngine 并允许它在多线程应用程序中使用。如您所见,我使用了全局脚本变量,但这些变量在执行期间不会被修改。由于我们的设计围绕在内部调用此脚本的 Web 服务展开。

P.S. 以我的理解@DataProvider(parallel=true) 是测试多线程的正确方法,所以如果我错了请指出。

Edit Can anyone tell me how I can modify my code/script so that I can initialize the ScriptEngine and allow it to be used in a multi-threaded application. As I do not want to parse the script files over and over again.

As I previously thought that if the script does not use global variables to keep state it would be OK, but apparently that is not enough.

谢谢

最佳答案

您可以初始化一个 ScriptEngine 并在多线程应用程序中使用它。

您需要创建一个 CompiledScript 实例,而不是 engine.eval(myScript);,稍后您可以将其计算为 Bindings 实例:

Compilable compilable = (Compilable) engine;
CompiledScript script = compilable.compile(myScript);

而不是将您的引擎用作Invocable,您需要为每个线程/测试创建一个Bindings实例,评估编译脚本进去,得到script object mirror包装函数,然后是 call函数:

@Test(dataProvider = "validReferenceNumbers", timeOut = 3000)
public final void testValidReferenceNumber(String referenceNumber) throws ScriptException {
Map<String, String> parameters = new HashMap<>();
parameters.put("referenceNumber", referenceNumber);
Bindings bindings = engine.createBindings();
script.eval(bindings);
ScriptObjectMirror scriptObjectMirror = (ScriptObjectMirror) bindings.get("validate");
Object result = scriptObjectMirror.call(null, parameters);
/* insert result assertions here */
}

来源:

关于javascript - Nashorn 多线程编程,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/36011981/

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