Add trace to web socket JSON/RPC responses (hyperledger#6285)

* Add trace to web socket JSON/RPC responses Signed-off-by: Matthew Whitehead <[email protected]> * Don't throw runtime exception if we can't parse JSON for trace Signed-off-by: Matthew Whitehead <[email protected]> --------- Signed-off-by: Matthew Whitehead <[email protected]> Signed-off-by: jflo <[email protected]>
jflo · Dec 18, 2023 · 2623bfe · 2623bfe
1 parent 5c3987b
commit 2623bfe
Showing 1 changed file with 14 additions and 0 deletions.
diff --git a/...ain/java/org/hyperledger/besu/ethereum/api/jsonrpc/websocket/WebSocketMessageHandler.java b/...ain/java/org/hyperledger/besu/ethereum/api/jsonrpc/websocket/WebSocketMessageHandler.java
@@ -31,6 +31,7 @@
 import java.util.Optional;
 
 import com.fasterxml.jackson.core.JsonGenerator.Feature;
+import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.ObjectWriter;
 import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
@@ -46,6 +47,10 @@
 
 public class WebSocketMessageHandler {
 
+  private static final ObjectMapper jsonObjectMapper =
+      new ObjectMapper()
+          .registerModule(new Jdk8Module()); // Handle JDK8 Optionals (de)serialization
+
   private static final Logger LOG = LoggerFactory.getLogger(WebSocketMessageHandler.class);
   private static final ObjectWriter JSON_OBJECT_WRITER =
       new ObjectMapper()
@@ -161,6 +166,7 @@ public void handle(
   }
 
   private void replyToClient(final ServerWebSocket websocket, final Object result) {
+    traceResponse(result);
     try {
       // underlying output stream lifecycle is managed by the json object writer
       JSON_OBJECT_WRITER.writeValue(new JsonResponseStreamer(websocket), result);
@@ -172,4 +178,12 @@ private void replyToClient(final ServerWebSocket websocket, final Object result)
   private JsonRpcResponse errorResponse(final Object id, final RpcErrorType error) {
     return new JsonRpcErrorResponse(id, error);
   }
+
+  private void traceResponse(final Object response) {
+    try {
+      LOG.trace(jsonObjectMapper.writeValueAsString(response));
+    } catch (JsonProcessingException e) {
+      LOG.error("Error tracing JSON-RPC response", e);
+    }
+  }
 }