Examples with RpcClient org.opennms.core.rpc.api.RpcClient used on opensource projects

Example 1 with RpcClient

use of org.opennms.core.rpc.api.RpcClient in project opennms by OpenNMS.

the class CamelRpcClientFactory method getClient.

@Override
public <S extends RpcRequest, T extends RpcResponse> RpcClient<S, T> getClient(RpcModule<S, T> module) {
    return new RpcClient<S, T>() {

        @Override
        public CompletableFuture<T> execute(S request) {
            if (request.getLocation() == null || request.getLocation().equals(location)) {
                // The request is for the current location, invoke it directly
                return module.execute(request);
            }
            // Save the context map and restore it on callback
            final Map<String, String> clientContextMap = Logging.getCopyOfContextMap();
            // Wrap the request in a CamelRpcRequest and forward it to the Camel route
            final CompletableFuture<T> future = new CompletableFuture<>();
            try {
                template.asyncCallbackSendBody(endpoint, new CamelRpcRequest<>(module, request), new Synchronization() {

                    @Override
                    public void onComplete(Exchange exchange) {
                        try (MDCCloseable mdc = Logging.withContextMapCloseable(clientContextMap)) {
                            final T response = module.unmarshalResponse(exchange.getOut().getBody(String.class));
                            if (response.getErrorMessage() != null) {
                                future.completeExceptionally(new RemoteExecutionException(response.getErrorMessage()));
                            } else {
                                future.complete(response);
                            }
                        } catch (Throwable ex) {
                            LOG.error("Unmarshalling a response in RPC module {} failed.", module, ex);
                            future.completeExceptionally(ex);
                        }
                        // Ensure that future log statements on this thread are routed properly
                        Logging.putPrefix(RpcClientFactory.LOG_PREFIX);
                    }

                    @Override
                    public void onFailure(Exchange exchange) {
                        try (MDCCloseable mdc = Logging.withContextMapCloseable(clientContextMap)) {
                            final ExchangeTimedOutException timeoutException = exchange.getException(ExchangeTimedOutException.class);
                            final DirectConsumerNotAvailableException directConsumerNotAvailableException = exchange.getException(DirectConsumerNotAvailableException.class);
                            if (timeoutException != null) {
                                // Wrap timeout exceptions within a RequestTimedOutException
                                future.completeExceptionally(new RequestTimedOutException(exchange.getException()));
                            } else if (directConsumerNotAvailableException != null) {
                                // Wrap consumer not available exceptions with a RequestRejectedException
                                future.completeExceptionally(new RequestRejectedException(exchange.getException()));
                            } else {
                                future.completeExceptionally(exchange.getException());
                            }
                        }
                        // Ensure that future log statements on this thread are routed properly
                        Logging.putPrefix(RpcClientFactory.LOG_PREFIX);
                    }
                });
            } catch (IllegalStateException e) {
                try (MDCCloseable mdc = Logging.withContextMapCloseable(clientContextMap)) {
                    // Wrap ProducerTemplate exceptions with a RequestRejectedException
                    future.completeExceptionally(new RequestRejectedException(e));
                }
                // Ensure that future log statements on this thread are routed properly
                Logging.putPrefix(RpcClientFactory.LOG_PREFIX);
            }
            return future;
        }
    };
}