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Merged
merged 1 commit into from
Feb 15, 2022
Merged

custom response handling #81

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8 changes: 8 additions & 0 deletions graphql-router/src/main/java/com/networknt/graphql/router/GraphqlCustomHandler.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,8 @@
package com.networknt.graphql.router;

import graphql.ExecutionResult;
import io.undertow.server.HttpServerExchange;

public interface GraphqlCustomHandler {
void handleResponse(HttpServerExchange exchange, ExecutionResult result);
}
27 changes: 18 additions & 9 deletions graphql-router/src/main/java/com/networknt/graphql/router/handlers/GraphqlPostHandler.java
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Expand Up @@ -4,7 +4,7 @@
import com.networknt.graphql.common.GraphqlUtil;
import com.networknt.graphql.router.ExecutionStrategyProvider;
import com.networknt.graphql.common.InstrumentationLoader;
import com.networknt.graphql.common.InstrumentationProvider;
import com.networknt.graphql.router.GraphqlCustomHandler;
import com.networknt.graphql.router.SchemaProvider;
import com.networknt.service.SingletonServiceFactory;
import com.networknt.status.Status;
Expand Down Expand Up @@ -42,6 +42,7 @@ public class GraphqlPostHandler implements HttpHandler {
static ExecutionStrategy queryExecutionStrategy = null;
static ExecutionStrategy mutationExecutionStrategy = null;
static ExecutionStrategy subscriptionExecutionStrategy = null;
static GraphqlCustomHandler customHandler = null;

static {
// load GraphQL Schema with service loader. It should be defined in service.yml
Expand All @@ -53,6 +54,10 @@ public class GraphqlPostHandler implements HttpHandler {
logger.error("Unable to load GraphQL schema - no SchemaProvider implementation in service.yml");
throw new RuntimeException("Unable to load GraphQL schema - no SchemaProvider implementation in service.yml");
}
GraphqlCustomHandler handler = SingletonServiceFactory.getBean(GraphqlCustomHandler.class);
if(handler != null ){
customHandler = handler;
}

// Replace default execution strategies if so configured.
ExecutionStrategyProvider executionStrategyProvider = SingletonServiceFactory.getBean(ExecutionStrategyProvider.class);
Expand Down Expand Up @@ -88,16 +93,20 @@ public void handleRequest(HttpServerExchange exchange) throws Exception {
String operationName = (String)requestParameters.get(GRAPHQL_REQUEST_OP_NAME_KEY);
ExecutionInput executionInput = ExecutionInput.newExecutionInput().query(query).operationName(operationName).context(exchange).root(exchange).variables(variables).build();
ExecutionResult executionResult = graphQL.execute(executionInput);
Map<String, Object> result = new HashMap<>();
if (executionResult.getErrors().size() > 0) {
result.put(GRAPHQL_RESPONSE_ERROR_KEY, executionResult.getErrors());
logger.error("Errors: {}", executionResult.getErrors());
if (customHandler != null) {
customHandler.handleResponse(exchange, executionResult);
} else {
result.put(GRAPHQL_RESPONSE_DATA_KEY, executionResult.getData());
Map<String, Object> result = new HashMap<>();
if (executionResult.getErrors().size() > 0) {
result.put(GRAPHQL_RESPONSE_ERROR_KEY, executionResult.getErrors());
logger.error("Errors: {}", executionResult.getErrors());
} else {
result.put(GRAPHQL_RESPONSE_DATA_KEY, executionResult.getData());
}
exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "application/json");
exchange.setStatusCode(StatusCodes.OK);
exchange.getResponseSender().send(Config.getInstance().getMapper().writeValueAsString(result));
}
exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "application/json");
exchange.setStatusCode(StatusCodes.OK);
exchange.getResponseSender().send(Config.getInstance().getMapper().writeValueAsString(result));
}

private GraphQL getGraphql() {
Expand Down