/**
* The class handles incoming requests from DMAAP.
* <p>
- * That means: invoke a REST call towards this services and to send back a
- * response though DMAAP
+ * That means: invoke a REST call towards this services and to send back a response though DMAAP
*/
public class DmaapMessageHandler {
private static final Logger logger = LoggerFactory.getLogger(DmaapMessageHandler.class);
private static Gson gson = new GsonBuilder() //
- .create(); //
+ .create(); //
private final AsyncRestClient dmaapClient;
private final AsyncRestClient agentClient;
try {
DmaapRequestMessage dmaapRequestMessage = gson.fromJson(msg, ImmutableDmaapRequestMessage.class);
return this.invokePolicyAgent(dmaapRequestMessage) //
- .onErrorResume(t -> handleAgentCallError(t, msg, dmaapRequestMessage)) //
- .flatMap(
- response -> sendDmaapResponse(response.getBody(), dmaapRequestMessage, response.getStatusCode()));
+ .onErrorResume(t -> handleAgentCallError(t, dmaapRequestMessage)) //
+ .flatMap(response -> sendDmaapResponse(response.getBody(), dmaapRequestMessage,
+ response.getStatusCode()));
} catch (Exception e) {
String errorMsg = "Received unparsable message from DMAAP: \"" + msg + "\", reason: " + e.getMessage();
return Mono.error(new ServiceException(errorMsg)); // Cannot make any response
}
}
- private Mono<ResponseEntity<String>> handleAgentCallError(Throwable t, String originalMessage,
- DmaapRequestMessage dmaapRequestMessage) {
- logger.debug("Agent call failed: {}", t.getMessage());
+ private Mono<ResponseEntity<String>> handleAgentCallError(Throwable error,
+ DmaapRequestMessage dmaapRequestMessage) {
+ logger.debug("Agent call failed: {}", error.getMessage());
HttpStatus status = HttpStatus.INTERNAL_SERVER_ERROR;
- String errorMessage = t.getMessage();
- if (t instanceof WebClientResponseException) {
- WebClientResponseException exception = (WebClientResponseException) t;
+ String errorMessage = error.getMessage();
+ if (error instanceof WebClientResponseException) {
+ WebClientResponseException exception = (WebClientResponseException) error;
status = exception.getStatusCode();
errorMessage = exception.getResponseBodyAsString();
- } else if (t instanceof ServiceException) {
+ } else if (error instanceof ServiceException) {
status = HttpStatus.BAD_REQUEST;
- errorMessage = prepareBadOperationErrorMessage(t, originalMessage);
- } else if (!(t instanceof WebClientException)) {
- logger.warn("Unexpected exception ", t);
+ errorMessage = error.getMessage();
+ } else if (!(error instanceof WebClientException)) {
+ logger.warn("Unexpected exception ", error);
}
return sendDmaapResponse(errorMessage, dmaapRequestMessage, status) //
- .flatMap(notUsed -> Mono.empty());
- }
-
- private String prepareBadOperationErrorMessage(Throwable t, String originalMessage) {
- return t.getMessage();
+ .flatMap(notUsed -> Mono.empty());
}
private Mono<ResponseEntity<String>> invokePolicyAgent(DmaapRequestMessage dmaapRequestMessage) {
}
private Mono<String> sendDmaapResponse(String response, DmaapRequestMessage dmaapRequestMessage,
- HttpStatus status) {
+ HttpStatus status) {
return createDmaapResponseMessage(dmaapRequestMessage, response, status) //
- .flatMap(this::sendToDmaap) //
- .onErrorResume(this::handleResponseCallError);
+ .flatMap(this::sendToDmaap) //
+ .onErrorResume(this::handleResponseCallError);
}
private Mono<String> sendToDmaap(String body) {
}
private Mono<String> createDmaapResponseMessage(DmaapRequestMessage dmaapRequestMessage, String response,
- HttpStatus status) {
+ HttpStatus status) {
DmaapResponseMessage dmaapResponseMessage = ImmutableDmaapResponseMessage.builder() //
- .status(status.toString()) //
- .message(response == null ? "" : response) //
- .type("response") //
- .correlationId(dmaapRequestMessage.correlationId() == null ? "" : dmaapRequestMessage.correlationId()) //
- .originatorId(dmaapRequestMessage.originatorId() == null ? "" : dmaapRequestMessage.originatorId()) //
- .requestId(dmaapRequestMessage.requestId() == null ? "" : dmaapRequestMessage.requestId()) //
- .timestamp(dmaapRequestMessage.timestamp() == null ? "" : dmaapRequestMessage.timestamp()) //
- .build();
+ .status(status.toString()) //
+ .message(response == null ? "" : response) //
+ .type("response") //
+ .correlationId(dmaapRequestMessage.correlationId() == null ? "" : dmaapRequestMessage.correlationId()) //
+ .originatorId(dmaapRequestMessage.originatorId() == null ? "" : dmaapRequestMessage.originatorId()) //
+ .requestId(dmaapRequestMessage.requestId() == null ? "" : dmaapRequestMessage.requestId()) //
+ .timestamp(dmaapRequestMessage.timestamp() == null ? "" : dmaapRequestMessage.timestamp()) //
+ .build();
String str = gson.toJson(dmaapResponseMessage);
return Mono.just(str);