X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?a=blobdiff_plain;f=policy-agent%2Fsrc%2Fmain%2Fjava%2Forg%2Foransc%2Fpolicyagent%2Fdmaap%2FDmaapMessageHandler.java;h=3c44f08575afb844f77b40a47856d305a9b7ee9c;hb=6f609c727d66ad20b5b31eae472fcde5e4acd569;hp=9b0c809c2b8426f74e92dd72b21ae238f98beb68;hpb=a538ca7e0b840e8dc20e85c1864697823ad96ae0;p=nonrtric.git
diff --git a/policy-agent/src/main/java/org/oransc/policyagent/dmaap/DmaapMessageHandler.java b/policy-agent/src/main/java/org/oransc/policyagent/dmaap/DmaapMessageHandler.java
index 9b0c809c..3c44f085 100644
--- a/policy-agent/src/main/java/org/oransc/policyagent/dmaap/DmaapMessageHandler.java
+++ b/policy-agent/src/main/java/org/oransc/policyagent/dmaap/DmaapMessageHandler.java
@@ -2,7 +2,7 @@
* ========================LICENSE_START=================================
* O-RAN-SC
* %%
- * Copyright (C) 2019 Nordix Foundation
+ * Copyright (C) 2020 Nordix Foundation
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
@@ -17,90 +17,123 @@
* limitations under the License.
* ========================LICENSE_END===================================
*/
-
package org.oransc.policyagent.dmaap;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
+import com.google.gson.JsonObject;
import java.io.IOException;
+import java.util.Optional;
import org.onap.dmaap.mr.client.MRBatchingPublisher;
import org.oransc.policyagent.clients.AsyncRestClient;
-import org.oransc.policyagent.configuration.ApplicationConfig;
import org.oransc.policyagent.dmaap.DmaapRequestMessage.Operation;
+import org.oransc.policyagent.exceptions.ServiceException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.reactive.function.client.WebClientResponseException;
import reactor.core.publisher.Mono;
+/**
+ * The class handles incoming requests from 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() //
- .serializeNulls() //
.create(); //
-
private final MRBatchingPublisher dmaapClient;
private final AsyncRestClient agentClient;
- public DmaapMessageHandler(MRBatchingPublisher dmaapClient, ApplicationConfig applicationConfig,
- AsyncRestClient agentClient) {
+ public DmaapMessageHandler(MRBatchingPublisher dmaapClient, AsyncRestClient agentClient) {
this.agentClient = agentClient;
this.dmaapClient = dmaapClient;
}
public void handleDmaapMsg(String msg) {
this.createTask(msg) //
- .subscribe(x -> logger.debug("handleDmaapMsg: " + x), //
- throwable -> logger.warn("handleDmaapMsg failure ", throwable), //
+ .subscribe(message -> logger.debug("handleDmaapMsg: {}", message), //
+ throwable -> logger.warn("handleDmaapMsg failure {}", throwable.getMessage()), //
() -> logger.debug("handleDmaapMsg complete"));
}
Mono createTask(String msg) {
try {
DmaapRequestMessage dmaapRequestMessage = gson.fromJson(msg, ImmutableDmaapRequestMessage.class);
-
return this.invokePolicyAgent(dmaapRequestMessage) //
- .onErrorResume(t -> handleAgentCallError(t, dmaapRequestMessage)) //
- .flatMap(response -> sendDmaapResponse(response, dmaapRequestMessage, HttpStatus.OK));
-
+ .onErrorResume(t -> handleAgentCallError(t, msg, dmaapRequestMessage)) //
+ .flatMap(
+ response -> sendDmaapResponse(response.getBody(), dmaapRequestMessage, response.getStatusCode()));
} catch (Exception e) {
logger.warn("Received unparsable message from DMAAP: {}", msg);
- return Mono.error(e);
+ return Mono.error(e); // Cannot make any response
+ }
+ }
+
+ private Mono> handleAgentCallError(Throwable t, String originalMessage,
+ DmaapRequestMessage dmaapRequestMessage) {
+ logger.debug("Agent call failed: {}", t.getMessage());
+ HttpStatus status = HttpStatus.NOT_FOUND;
+ String errorMessage = t.getMessage();
+ if (t instanceof WebClientResponseException) {
+ WebClientResponseException exception = (WebClientResponseException) t;
+ status = exception.getStatusCode();
+ errorMessage = exception.getResponseBodyAsString();
+ } else if (t instanceof ServiceException) {
+ status = HttpStatus.BAD_REQUEST;
+ errorMessage = prepareBadOperationErrorMessage(t, originalMessage);
+
}
+ return sendDmaapResponse(errorMessage, dmaapRequestMessage, status) //
+ .flatMap(notUsed -> Mono.empty());
}
- private Mono handleAgentCallError(Throwable t, DmaapRequestMessage dmaapRequestMessage) {
- logger.debug("Agent call failed: " + t.getMessage());
- return sendDmaapResponse(t.toString(), dmaapRequestMessage, HttpStatus.NOT_FOUND) //
- .flatMap(s -> Mono.empty());
+ private String prepareBadOperationErrorMessage(Throwable t, String originalMessage) {
+ String operationParameterStart = "operation\":\"";
+ int indexOfOperationStart = originalMessage.indexOf(operationParameterStart) + operationParameterStart.length();
+ int indexOfOperationEnd = originalMessage.indexOf("\",\"", indexOfOperationStart);
+ String badOperation = originalMessage.substring(indexOfOperationStart, indexOfOperationEnd);
+ return t.getMessage().replace("null", badOperation);
}
- private Mono invokePolicyAgent(DmaapRequestMessage dmaapRequestMessage) {
+ private Mono> invokePolicyAgent(DmaapRequestMessage dmaapRequestMessage) {
DmaapRequestMessage.Operation operation = dmaapRequestMessage.operation();
- Mono result = null;
String uri = dmaapRequestMessage.url();
+
if (operation == Operation.DELETE) {
- result = agentClient.delete(uri);
+ return agentClient.deleteForEntity(uri);
} else if (operation == Operation.GET) {
- result = agentClient.get(uri);
+ return agentClient.getForEntity(uri);
} else if (operation == Operation.PUT) {
- result = agentClient.put(uri, dmaapRequestMessage.payload());
+ return agentClient.putForEntity(uri, payload(dmaapRequestMessage));
} else if (operation == Operation.POST) {
- result = agentClient.post(uri, dmaapRequestMessage.payload());
+ return agentClient.postForEntity(uri, payload(dmaapRequestMessage));
+ } else {
+ return Mono.error(new ServiceException("Not implemented operation: " + operation));
+ }
+
+ }
+
+ private String payload(DmaapRequestMessage message) {
+ Optional payload = message.payload();
+ if (payload.isPresent()) {
+ return gson.toJson(payload.get());
} else {
- return Mono.error(new Exception("Not implemented operation: " + operation));
+ logger.warn("Expected payload in message from DMAAP: {}", message);
+ return "";
}
- return result;
}
private Mono sendDmaapResponse(String response, DmaapRequestMessage dmaapRequestMessage,
HttpStatus status) {
- return getDmaapResponseMessage(dmaapRequestMessage, response, status) //
- .flatMap(body -> sendToDmaap(body)) //
- .onErrorResume(t -> handleResponseCallError(t, dmaapRequestMessage));
+ return createDmaapResponseMessage(dmaapRequestMessage, response, status) //
+ .flatMap(this::sendToDmaap) //
+ .onErrorResume(this::handleResponseCallError);
}
private Mono sendToDmaap(String body) {
@@ -114,26 +147,24 @@ public class DmaapMessageHandler {
}
}
- private Mono handleResponseCallError(Throwable t, DmaapRequestMessage dmaapRequestMessage) {
- logger.debug("Failed to respond: " + t.getMessage());
+ private Mono handleResponseCallError(Throwable t) {
+ logger.debug("Failed to send response to DMaaP: {}", t.getMessage());
return Mono.empty();
}
- private Mono getDmaapResponseMessage(DmaapRequestMessage dmaapRequestMessage, String response,
+ private Mono createDmaapResponseMessage(DmaapRequestMessage dmaapRequestMessage, String response,
HttpStatus status) {
DmaapResponseMessage dmaapResponseMessage = ImmutableDmaapResponseMessage.builder() //
.status(status.toString()) //
- .message(response) //
+ .message(response == null ? "" : response) //
.type("response") //
- .correlationId(dmaapRequestMessage.correlationId()) //
- .originatorId(dmaapRequestMessage.originatorId()) //
- .requestId(dmaapRequestMessage.requestId()) //
- .timestamp(dmaapRequestMessage.timestamp()) //
+ .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);
}
-
}