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181 changes: 181 additions & 0 deletions
181
...rvices/accelerator/gateway/executor/impl/error/handling/DefaultErrorHandlingExecutor.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,181 @@ | ||
| /** | ||
| * Copyright (c) 2024, WSO2 LLC. (https://www.wso2.com). | ||
| * <p> | ||
| * WSO2 LLC. licenses this file to you under the Apache License, | ||
| * Version 2.0 (the "License"); you may not use this file except | ||
| * in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * <p> | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * <p> | ||
| * Unless required by applicable law or agreed to in writing, | ||
| * software distributed under the License is distributed on an | ||
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
| * KIND, either express or implied. See the License for the | ||
| * specific language governing permissions and limitations | ||
| * under the License. | ||
| */ | ||
|
|
||
| package org.wso2.financial.services.accelerator.gateway.executor.impl.error.handling; | ||
|
|
||
| import org.apache.http.HttpStatus; | ||
| import org.json.JSONArray; | ||
| import org.json.JSONObject; | ||
| import org.wso2.financial.services.accelerator.gateway.executor.core.FinancialServicesGatewayExecutor; | ||
| import org.wso2.financial.services.accelerator.gateway.executor.model.FSAPIRequestContext; | ||
| import org.wso2.financial.services.accelerator.gateway.executor.model.FSAPIResponseContext; | ||
| import org.wso2.financial.services.accelerator.gateway.executor.model.FSExecutorError; | ||
| import org.wso2.financial.services.accelerator.gateway.util.GatewayConstants; | ||
|
|
||
| import java.util.ArrayList; | ||
| import java.util.HashSet; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
|
|
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| /** | ||
| * Default Executor to handle gateway errors. | ||
| */ | ||
| public class DefaultErrorHandlingExecutor implements FinancialServicesGatewayExecutor { | ||
|
|
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| private static final String ERRORS_TAG = "errors"; | ||
|
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| /** | ||
| * Method to handle pre request. | ||
| * | ||
| * @param fsapiRequestContext FS request context object | ||
| */ | ||
| @Override | ||
| public void preProcessRequest(FSAPIRequestContext fsapiRequestContext) { | ||
|
|
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| handleRequestError(fsapiRequestContext); | ||
|
|
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| } | ||
|
|
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| /** | ||
| * Method to handle post request. | ||
| * | ||
| * @param fsapiRequestContext FS request context object | ||
| */ | ||
| @Override | ||
| public void postProcessRequest(FSAPIRequestContext fsapiRequestContext) { | ||
|
|
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| handleRequestError(fsapiRequestContext); | ||
| } | ||
|
|
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| /** | ||
| * Method to handle pre response. | ||
| * | ||
| * @param fsapiResponseContext FS response context object | ||
| */ | ||
| @Override | ||
| public void preProcessResponse(FSAPIResponseContext fsapiResponseContext) { | ||
|
|
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| handleResponseError(fsapiResponseContext); | ||
| } | ||
|
|
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| /** | ||
| * Method to handle post response. | ||
| * | ||
| * @param fsapiResponseContext FS response context object | ||
| */ | ||
| @Override | ||
| public void postProcessResponse(FSAPIResponseContext fsapiResponseContext) { | ||
|
|
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| handleResponseError(fsapiResponseContext); | ||
| } | ||
|
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| private void handleRequestError(FSAPIRequestContext fsapiRequestContext) { | ||
|
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| if (!fsapiRequestContext.isError()) { | ||
| return; | ||
| } | ||
| JSONObject payload = new JSONObject(); | ||
| ArrayList<FSExecutorError> errors = fsapiRequestContext.getErrors(); | ||
| JSONArray errorList = getErrorJSON(errors); | ||
| HashSet<String> statusCodes = new HashSet<>(); | ||
|
|
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| for (FSExecutorError error : errors) { | ||
| statusCodes.add(error.getHttpStatusCode()); | ||
| } | ||
|
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| payload.put(ERRORS_TAG, errorList); | ||
| if (errorList.length() != 0) { | ||
| fsapiRequestContext.setModifiedPayload(payload.toString()); | ||
| Map<String, String> addedHeaders = fsapiRequestContext.getAddedHeaders(); | ||
| addedHeaders.put(GatewayConstants.CONTENT_TYPE_TAG, GatewayConstants.JSON_CONTENT_TYPE); | ||
| fsapiRequestContext.setAddedHeaders(addedHeaders); | ||
| } | ||
| int statusCode; | ||
| if (fsapiRequestContext.getContextProps().containsKey(GatewayConstants.ERROR_STATUS_PROP)) { | ||
| statusCode = Integer.parseInt(fsapiRequestContext | ||
| .getContextProperty(GatewayConstants.ERROR_STATUS_PROP).toString()); | ||
| } else if (isAnyClientErrors(statusCodes)) { | ||
| statusCode = HttpStatus.SC_BAD_REQUEST; | ||
| } else { | ||
| statusCode = HttpStatus.SC_INTERNAL_SERVER_ERROR; | ||
| } | ||
| fsapiRequestContext.addContextProperty(GatewayConstants.ERROR_STATUS_PROP, | ||
| String.valueOf(statusCode)); | ||
| } | ||
|
|
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| private void handleResponseError(FSAPIResponseContext fsapiResponseContext) { | ||
|
|
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| if (!fsapiResponseContext.isError()) { | ||
| return; | ||
| } | ||
| JSONObject payload = new JSONObject(); | ||
| ArrayList<FSExecutorError> errors = fsapiResponseContext.getErrors(); | ||
| JSONArray errorList = getErrorJSON(errors); | ||
| HashSet<String> statusCodes = new HashSet<>(); | ||
|
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| for (FSExecutorError error : errors) { | ||
| statusCodes.add(error.getHttpStatusCode()); | ||
| } | ||
|
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| payload.put(ERRORS_TAG, errorList); | ||
| fsapiResponseContext.setModifiedPayload(payload.toString()); | ||
| Map<String, String> addedHeaders = fsapiResponseContext.getAddedHeaders(); | ||
| addedHeaders.put(GatewayConstants.CONTENT_TYPE_TAG, GatewayConstants.JSON_CONTENT_TYPE); | ||
| fsapiResponseContext.setAddedHeaders(addedHeaders); | ||
| int statusCode; | ||
| if (fsapiResponseContext.getContextProps().containsKey(GatewayConstants.ERROR_STATUS_PROP)) { | ||
| statusCode = Integer.parseInt(fsapiResponseContext | ||
| .getContextProperty(GatewayConstants.ERROR_STATUS_PROP).toString()); | ||
| } else if (isAnyClientErrors(statusCodes)) { | ||
| statusCode = HttpStatus.SC_BAD_REQUEST; | ||
| } else { | ||
| statusCode = HttpStatus.SC_INTERNAL_SERVER_ERROR; | ||
| } | ||
| fsapiResponseContext.addContextProperty(GatewayConstants.ERROR_STATUS_PROP, | ||
| String.valueOf(statusCode)); | ||
| } | ||
|
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| private JSONArray getErrorJSON(List<FSExecutorError> errors) { | ||
|
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| JSONArray errorList = new JSONArray(); | ||
| for (FSExecutorError error : errors) { | ||
| JSONObject errorObj = new JSONObject(); | ||
| errorObj.put("code", error.getCode()); | ||
| errorObj.put("message", error.getTitle()); | ||
| errorObj.put("description", error.getMessage()); | ||
| Map<String, String> links = error.getLinks(); | ||
| if (links != null && links.size() > 0) { | ||
| JSONObject linksObj = new JSONObject(); | ||
| links.forEach(linksObj::put); | ||
| errorObj.put("Links", linksObj); | ||
| } | ||
| errorList.put(errorObj); | ||
| } | ||
| return errorList; | ||
| } | ||
|
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| private boolean isAnyClientErrors(HashSet<String> statusCodes) { | ||
|
|
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| for (String statusCode : statusCodes) { | ||
| if (statusCode.startsWith("4")) { | ||
| return true; | ||
| } | ||
| } | ||
| return false; | ||
| } | ||
| } |
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