Examples with Invoker io.gravitee.gateway.api.Invoker used on opensource projects

Example 1 with Invoker

use of io.gravitee.gateway.api.Invoker in project gravitee-gateway by gravitee-io.

the class ApiReactorHandler method handleClientRequest.

private void handleClientRequest(Request serverRequest, Response serverResponse, ExecutionContext executionContext, Handler<Response> handler) {
    serverRequest.pause();
    // Apply request policies
    RequestPolicyChainProcessor requestPolicyChain = new RequestPolicyChainProcessor(policyResolvers);
    requestPolicyChain.setResultHandler(requestPolicyChainResult -> {
        if (requestPolicyChainResult.isFailure()) {
            sendPolicyFailure(requestPolicyChainResult.getPolicyResult(), serverResponse);
            handler.handle(serverResponse);
        } else {
            // Call an invoker to get a proxy connection (connection to an underlying backend, mainly HTTP)
            Invoker upstreamInvoker = (Invoker) executionContext.getAttribute(ExecutionContext.ATTR_INVOKER);
            long serviceInvocationStart = System.currentTimeMillis();
            AtomicReference<ProxyConnection> proxyConnection = new AtomicReference<>();
            Request invokeRequest = upstreamInvoker.invoke(executionContext, serverRequest, requestPolicyChainResult.getPolicyChain(), connection -> {
                proxyConnection.set(connection);
                connection.responseHandler(proxyResponse -> handleProxyResponse(serverRequest, serverResponse, executionContext, proxyResponse, serviceInvocationStart, handler));
                requestPolicyChain.setStreamErrorHandler(result -> {
                    connection.cancel();
                    sendPolicyFailure(result.getPolicyResult(), serverResponse);
                    handler.handle(serverResponse);
                });
            });
            // Plug server request stream to request policy chain stream
            invokeRequest.bodyHandler(chunk -> requestPolicyChainResult.getPolicyChain().write(chunk)).endHandler(aVoid -> requestPolicyChainResult.getPolicyChain().end());
        }
    });
    requestPolicyChain.execute(serverRequest, serverResponse, executionContext);
}