Question

我希望在一个地方实现广义未捕获的异常处理代码。我通过使用v8::TryCatch来实现这一目标。我注意到的一个问题是，当v8::TryCatch::ReThrow下发生异常时，消息监听器永远不会触发。调用v8::TryCatch似乎没有什么区别。

我的问题是，是否有可能以某种方式将异常发送到消息监听器？我希望在这个特定位置有hello-world.cc，以便检查自己发生的错误，并将它们发送到单独的内部日志记录，同时，我想使用消息监听器发送错误到另一个位置（这个是面向客户的）。

我的最小repro示例如下（通过修改void MessageHandler(v8::Local<v8::Message> message, v8::Local<v8::Value> data) { printf("%s\n", __PRETTY_FUNCTION__); } int main(int argc, char** argv) { // Initialize V8. v8::V8::InitializeICUDefaultLocation(argv[0]); v8::V8::InitializeExternalStartupData(argv[0]); std::unique_ptr<v8::Platform> platform = v8::platform::NewDefaultPlatform(); v8::V8::InitializePlatform(platform.get()); v8::V8::Initialize(); // Create a new Isolate and make it the current one. v8::Isolate::CreateParams create_params; create_params.array_buffer_allocator = v8::ArrayBuffer::Allocator::NewDefaultAllocator(); v8::Isolate* isolate = v8::Isolate::New(create_params); isolate->AddMessageListenerWithErrorLevel( MessageHandler, v8::Isolate::kMessageError | v8::Isolate::kMessageWarning | v8::Isolate::kMessageInfo | v8::Isolate::kMessageDebug | v8::Isolate::kMessageLog); { v8::Isolate::Scope isolate_scope(isolate); // Create a stack-allocated handle scope. v8::HandleScope handle_scope(isolate); // Create a new context. v8::Local<v8::Context> context = v8::Context::New(isolate); // Enter the context for compiling and running the hello world script. v8::Context::Scope context_scope(context); // The message listener will fire if this is removed. v8::TryCatch try_catch(isolate); // Create a string containing the JavaScript source code. v8::Local<v8::String> source = v8::String::NewFromUtf8(isolate, "throw new Error()", v8::NewStringType::kNormal) .ToLocalChecked(); // Compile the source code. v8::Local<v8::Script> script = v8::Script::Compile(context, source).ToLocalChecked(); // Run the script to get the result. v8::Local<v8::Value> result; if (script->Run(context).ToLocal(&result)) { // Convert the result to an UTF8 string and print it. v8::String::Utf8Value utf8(isolate, result); printf("Success: %s\n", *utf8); } else { printf("Error\n"); // Calling this doesn't seem to make a difference. try_catch.ReThrow(); } } // Dispose the isolate and tear down V8. isolate->Dispose(); v8::V8::Dispose(); v8::V8::ShutdownPlatform(); delete create_params.array_buffer_allocator; return 0; }示例文件创建）。

@Entity
public class PasswordResetCode {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;
    @ManyToOne
    private User user;
    @Column(unique = true)
    private String code;

    public PasswordResetCode(User user, String code) {
        this.user = user;
        user.addPasswordResetCode(this);
        this.code = code;
    }

    // ...

}

@Entity
@Table(name = "\"user\"")
public class User {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private long id;
    @OneToMany(cascade = CascadeType.ALL, mappedBy = "user", orphanRemoval = true)
    private Set<PasswordResetCode> passwordResetCodes = new HashSet<>();

    public void addPasswordResetCode(PasswordResetCode passwordResetCode) {
        this.passwordResetCodes.add(passwordResetCode);
    }

    // ...    
}

只有在删除try catch后才会调用消息侦听器。

Answer 1

您需要将

设置为true

try_catch.SetVerbose(true)

如何在v8 :: TryCatch块下引发异常时触发MessageListener

1 个答案: