Hello I am trying to implement a Synchronous message pact in Pact Foundation #pact-jvm

Hello, I am trying to implement a Synchronous mes...

Ruud Welling

03/14/2025, 11:10 AM

Hello, I am trying to implement a Synchronous message pact interaction. Where the consumer uses messaging to send a request message (command) and expects a response message back. The request body uses a field that is a value from the provider state. However when processing the message in the provider, then we do not receive the provider state variable in the message, but the example from the Consumer pact.

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@PactVerifyProvider("A command message")
    public MessageAndMetadata processCommand(MessageContents messageContents) {
        var jsonMessage = messageContents.getContents().valueAsString();
        // this json message does not have the provider state applied
        // instead it contains the example value provided by the consumer...

    }

I tried to look for examples in the pact SDK, but could not really find any. Am I doing this in the right way? Is provider state supported in message pacts?

Ruud Welling

03/14/2025, 11:11 AM

One workaround that I now use is to generate a providerState map copy in my test, and use the following to regenerate the message contents:

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var generated = DefaultResponseGenerator.INSTANCE
                .generateContents(messageContents,
                        Map.of("providerState", providerState),
                        GeneratorTestMode.Provider,
                        List.of(), Map.of(), true);

Ruud Welling

03/14/2025, 11:12 AM

I would have expected the Pact SDK to have already applied this before calling the

@PactVerifyProvider

method

Ruud Welling

03/16/2025, 5:50 PM

I created https://github.com/pact-foundation/pact-jvm/pull/1858 to fix this issue

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