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Merged
kabir merged 2 commits into from
Jul 29, 2025
Merged

Add ServerCallContext #14

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8cc3a28
Add ServerCallContext
kabir Jul 29, 2025
98da0ae
USe SecurityContext to get auth info
kabir Jul 29, 2025
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5 changes: 5 additions & 0 deletions impl/pom.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,11 @@
<artifactId>a2a-java-sdk-tests-server-common</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jakarta.servlet</groupId>
<artifactId>jakarta.servlet-api</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>io.github.a2asdk</groupId>
<artifactId>a2a-java-sdk-tests-server-common</artifactId>
Expand Down
110 changes: 86 additions & 24 deletions impl/src/main/java/org/wildfly/extras/a2a/server/apps/jakarta/A2AServerResource.java
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Original file line number Diff line number Diff line change
@@ -1,10 +1,14 @@
package org.wildfly.extras.a2a.server.apps.jakarta;

import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.Executor;
import java.util.concurrent.Flow;

import jakarta.enterprise.inject.Instance;
import jakarta.inject.Inject;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.ws.rs.Consumes;
import jakarta.ws.rs.GET;
import jakarta.ws.rs.POST;
Expand All @@ -13,6 +17,7 @@
import jakarta.ws.rs.core.Context;
import jakarta.ws.rs.core.MediaType;
import jakarta.ws.rs.core.Response;
import jakarta.ws.rs.core.SecurityContext;
import jakarta.ws.rs.ext.ExceptionMapper;
import jakarta.ws.rs.ext.Provider;
import jakarta.ws.rs.sse.Sse;
Expand All @@ -21,6 +26,9 @@
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import io.a2a.server.ExtendedAgentCard;
import io.a2a.server.ServerCallContext;
import io.a2a.server.auth.UnauthenticatedUser;
import io.a2a.server.auth.User;
import io.a2a.server.requesthandlers.JSONRPCHandler;
import io.a2a.server.util.async.Internal;
import io.a2a.spec.AgentCard;
Expand Down Expand Up @@ -70,6 +78,10 @@ public class A2AServerResource {
@Internal
Executor executor;


@Inject
Instance<CallContextFactory> callContextFactory;

/**
* Handles incoming POST requests to the main A2A endpoint. Dispatches the
* request to the appropriate JSON-RPC handler method and returns the response.
Expand All @@ -80,10 +92,14 @@ public class A2AServerResource {
@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public JSONRPCResponse<?> handleNonStreamingRequests(NonStreamingJSONRPCRequest<?> request) {
public JSONRPCResponse<?> handleNonStreamingRequests(
NonStreamingJSONRPCRequest<?> request, @Context HttpServletRequest httpRequest,
@Context SecurityContext securityContext) {

ServerCallContext context = createCallContext(httpRequest, securityContext);
LOGGER.debug("Handling non-streaming request");
try {
return processNonStreamingRequest(request);
return processNonStreamingRequest(request, context);
} finally {
LOGGER.debug("Completed non-streaming request");
}
Expand All @@ -96,9 +112,13 @@ public JSONRPCResponse<?> handleNonStreamingRequests(NonStreamingJSONRPCRequest<
@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.SERVER_SENT_EVENTS)
public void handleStreamingRequests(StreamingJSONRPCRequest<?> request, @Context SseEventSink sseEventSink, @Context Sse sse) {
public void handleStreamingRequests(
StreamingJSONRPCRequest<?> request, @Context SseEventSink sseEventSink,
@Context Sse sse, @Context HttpServletRequest httpRequest,
@Context SecurityContext securityContext) {
ServerCallContext context = createCallContext(httpRequest, securityContext);
LOGGER.debug("Handling streaming request");
executor.execute(() -> processStreamingRequest(request, sseEventSink, sse));
executor.execute(() -> processStreamingRequest(request, sseEventSink, sse, context));
LOGGER.debug("Submitted streaming request for async processing");
}

Expand Down Expand Up @@ -142,33 +162,35 @@ public Response getAuthenticatedExtendedAgentCard() {
.build();
}

private JSONRPCResponse<?> processNonStreamingRequest(NonStreamingJSONRPCRequest<?> request) {
if (request instanceof GetTaskRequest) {
return jsonRpcHandler.onGetTask((GetTaskRequest) request);
} else if (request instanceof CancelTaskRequest) {
return jsonRpcHandler.onCancelTask((CancelTaskRequest) request);
} else if (request instanceof SetTaskPushNotificationConfigRequest) {
return jsonRpcHandler.setPushNotificationConfig((SetTaskPushNotificationConfigRequest) request);
} else if (request instanceof GetTaskPushNotificationConfigRequest) {
return jsonRpcHandler.getPushNotificationConfig((GetTaskPushNotificationConfigRequest) request);
} else if (request instanceof SendMessageRequest) {
return jsonRpcHandler.onMessageSend((SendMessageRequest) request);
} else if (request instanceof ListTaskPushNotificationConfigRequest) {
return jsonRpcHandler.listPushNotificationConfig((ListTaskPushNotificationConfigRequest) request);
} else if (request instanceof DeleteTaskPushNotificationConfigRequest) {
return jsonRpcHandler.deletePushNotificationConfig((DeleteTaskPushNotificationConfigRequest) request);
private JSONRPCResponse<?> processNonStreamingRequest(NonStreamingJSONRPCRequest<?> request,
ServerCallContext context) {
if (request instanceof GetTaskRequest req) {
return jsonRpcHandler.onGetTask(req, context);
} else if (request instanceof CancelTaskRequest req) {
return jsonRpcHandler.onCancelTask(req, context);
} else if (request instanceof SetTaskPushNotificationConfigRequest req) {
return jsonRpcHandler.setPushNotificationConfig(req, context);
} else if (request instanceof GetTaskPushNotificationConfigRequest req) {
return jsonRpcHandler.getPushNotificationConfig(req, context);
} else if (request instanceof SendMessageRequest req) {
return jsonRpcHandler.onMessageSend(req, context);
} else if (request instanceof ListTaskPushNotificationConfigRequest req) {
return jsonRpcHandler.listPushNotificationConfig(req, context);
} else if (request instanceof DeleteTaskPushNotificationConfigRequest req) {
return jsonRpcHandler.deletePushNotificationConfig(req, context);
} else {
return generateErrorResponse(request, new UnsupportedOperationError());
}
}

private void processStreamingRequest(StreamingJSONRPCRequest<?> request, SseEventSink sseEventSink, Sse sse) {
private void processStreamingRequest(StreamingJSONRPCRequest<?> request, SseEventSink sseEventSink, Sse sse,
ServerCallContext context) {
Flow.Publisher<? extends JSONRPCResponse<?>> publisher;
if (request instanceof SendStreamingMessageRequest) {
publisher = jsonRpcHandler.onMessageSendStream((SendStreamingMessageRequest) request);
if (request instanceof SendStreamingMessageRequest req) {
publisher = jsonRpcHandler.onMessageSendStream(req, context);
handleStreamingResponse(publisher, sseEventSink, sse);
} else if (request instanceof TaskResubscriptionRequest) {
publisher = jsonRpcHandler.onResubscribeToTask((TaskResubscriptionRequest) request);
} else if (request instanceof TaskResubscriptionRequest req) {
publisher = jsonRpcHandler.onResubscribeToTask(req, context);
handleStreamingResponse(publisher, sseEventSink, sse);
}
}
Expand Down Expand Up @@ -218,6 +240,46 @@ public static void setStreamingIsSubscribedRunnable(Runnable streamingIsSubscrib
A2AServerResource.streamingIsSubscribedRunnable = streamingIsSubscribedRunnable;
}

private ServerCallContext createCallContext(HttpServletRequest request, SecurityContext securityContext) {

if (callContextFactory.isUnsatisfied()) {
User user;

if (securityContext.getUserPrincipal() == null) {
user = UnauthenticatedUser.INSTANCE;
} else {
user = new User() {
@Override
public boolean isAuthenticated() {
return true;
}

@Override
public String getUsername() {
return securityContext.getUserPrincipal().getName();
}
};
}
Map<String, Object> state = new HashMap<>();
// TODO Python's impl has
// state['auth'] = request.auth
// in jsonrpc_app.py. Figure out what this maps to in what we have here

Map<String, String> headers = new HashMap<>();
for (Enumeration<String> headerNames = request.getHeaderNames(); headerNames.hasMoreElements() ; ) {
String name = headerNames.nextElement();
headers.put(name, headers.get(name));
}

state.put("headers", headers);

return new ServerCallContext(user, state);
} else {
CallContextFactory builder = callContextFactory.get();
return builder.build(request);
}
}

@Provider
public static class JsonParseExceptionMapper implements ExceptionMapper<JsonParseException> {

Expand Down
10 changes: 10 additions & 0 deletions impl/src/main/java/org/wildfly/extras/a2a/server/apps/jakarta/CallContextFactory.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,10 @@
package org.wildfly.extras.a2a.server.apps.jakarta;


import jakarta.servlet.http.HttpServletRequest;

import io.a2a.server.ServerCallContext;

public interface CallContextFactory {
ServerCallContext build(HttpServletRequest request);
}