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/*
* ============LICENSE_START=======================================================
* PROJECT
* ================================================================================
* Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
* Copyright (C) 2018 Nokia. All rights reserved.s
* ================================================================================
* Licensed 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.dcae.restapi;
import static java.util.stream.StreamSupport.stream;
import static org.springframework.http.ResponseEntity.accepted;
import com.att.nsa.clock.SaClock;
import com.att.nsa.logging.LoggingContext;
import com.att.nsa.logging.log4j.EcompFields;
import com.github.fge.jackson.JsonLoader;
import com.github.fge.jsonschema.core.report.ProcessingReport;
import com.github.fge.jsonschema.main.JsonSchema;
import java.util.UUID;
import java.util.concurrent.LinkedBlockingQueue;
import javax.servlet.http.HttpServletRequest;
import org.json.JSONArray;
import org.json.JSONObject;
import org.onap.dcae.ApplicationException;
import org.onap.dcae.ApplicationSettings;
import org.onap.dcae.common.VESLogger;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class VesRestController {
private static final Logger log = LoggerFactory.getLogger(VesRestController.class);
private static final String INVALID_JSON = ApiException.INVALID_JSON_INPUT.toJSON().toString();
private final ApplicationSettings applicationSettings;
private final LinkedBlockingQueue<JSONObject> inputQueue;
private final Logger metricsLog;
private final Logger errorLog;
private final Logger incomingRequestsLogger;
@Autowired
VesRestController(ApplicationSettings applicationSettings,
@Qualifier("metricsLog") Logger metricsLog,
@Qualifier("errorLog") Logger errorLog,
@Qualifier("incomingRequestsLogger") Logger incomingRequestsLogger,
@Qualifier("inputQueue") LinkedBlockingQueue<JSONObject> inputQueue) {
this.applicationSettings = applicationSettings;
this.metricsLog = metricsLog;
this.errorLog = errorLog;
this.incomingRequestsLogger = incomingRequestsLogger;
this.inputQueue = inputQueue;
}
@GetMapping("/")
String mainPage() {
return "Welcome to VESCollector";
}
//refactor in next iteration
@PostMapping(value = {"/eventListener/v1",
"/eventListener/v1/eventBatch",
"/eventListener/v2",
"/eventListener/v2/eventBatch",
"/eventListener/v3",
"/eventListener/v3/eventBatch",
"/eventListener/v4",
"/eventListener/v4/eventBatch",
"/eventListener/v5",
"/eventListener/v5/eventBatch",
"/eventListener/v7",
"/eventListener/v7/eventBatch"}, consumes = "application/json")
ResponseEntity<String> receiveEvent(@RequestBody String jsonPayload, HttpServletRequest httpServletRequest) {
String request = httpServletRequest.getRequestURI();
String version = extractVersion(request);
JSONObject jsonObject;
try {
jsonObject = new JSONObject(jsonPayload);
} catch (Exception e) {
log.error(INVALID_JSON);
return ResponseEntity.badRequest().body(INVALID_JSON);
}
String uuid = setUpECOMPLoggingForRequest();
incomingRequestsLogger.info(String.format(
"Received a VESEvent '%s', marked with unique identifier '%s', on api version '%s', from host: '%s'",
jsonObject, uuid, version, httpServletRequest.getRemoteHost()));
if (applicationSettings.jsonSchemaValidationEnabled()) {
if (isBatchRequest(request) && (jsonObject.has("eventList") && (!jsonObject.has("event")))) {
if (!conformsToSchema(jsonObject, version)) {
return errorResponse(ApiException.SCHEMA_VALIDATION_FAILED);
}
} else if (!isBatchRequest(request) && (!jsonObject.has("eventList") && (jsonObject.has("event")))) {
if (!conformsToSchema(jsonObject, version)) {
return errorResponse(ApiException.SCHEMA_VALIDATION_FAILED);
}
} else {
return errorResponse(ApiException.INVALID_JSON_INPUT);
}
}
JSONArray commonlyFormatted = convertToJSONArrayCommonFormat(jsonObject, request, uuid, version);
if (!putEventsOnProcessingQueue(commonlyFormatted)) {
errorLog.error("EVENT_RECEIPT_FAILURE: QueueFull " + ApiException.NO_SERVER_RESOURCES);
return errorResponse(ApiException.NO_SERVER_RESOURCES);
}
return accepted()
.contentType(MediaType.APPLICATION_JSON)
.body("Accepted");
}
private String extractVersion(String httpServletRequest) {
return httpServletRequest.split("/")[2];
}
private ResponseEntity<String> errorResponse(ApiException noServerResources) {
return ResponseEntity.status(noServerResources.httpStatusCode)
.body(noServerResources.toJSON().toString());
}
private boolean putEventsOnProcessingQueue(JSONArray arrayOfEvents) {
for (int i = 0; i < arrayOfEvents.length(); i++) {
metricsLog.info("EVENT_PUBLISH_START");
if (!inputQueue.offer((JSONObject) arrayOfEvents.get(i))) {
return false;
}
}
log.debug("CommonStartup.handleEvents:EVENTS has been published successfully!");
metricsLog.info("EVENT_PUBLISH_END");
return true;
}
private boolean conformsToSchema(JSONObject payload, String version) {
try {
JsonSchema schema = applicationSettings.jsonSchema(version);
ProcessingReport report = schema.validate(JsonLoader.fromString(payload.toString()));
if (!report.isSuccess()) {
log.warn("Schema validation failed for event: " + payload);
stream(report.spliterator(), false).forEach(e -> log.warn(e.getMessage()));
return false;
}
return report.isSuccess();
} catch (Exception e) {
throw new ApplicationException("Unable to validate against schema", e);
}
}
private static JSONArray convertToJSONArrayCommonFormat(JSONObject jsonObject, String request,
String uuid, String version) {
JSONArray asArrayEvents = new JSONArray();
String vesUniqueIdKey = "VESuniqueId";
String vesVersionKey = "VESversion";
if (isBatchRequest(request)) {
JSONArray events = jsonObject.getJSONArray("eventList");
for (int i = 0; i < events.length(); i++) {
JSONObject event = new JSONObject().put("event", events.getJSONObject(i));
event.put(vesUniqueIdKey, uuid + "-" + i);
event.put(vesVersionKey, version);
asArrayEvents.put(event);
}
} else {
jsonObject.put(vesUniqueIdKey, uuid);
jsonObject.put(vesVersionKey, version);
asArrayEvents = new JSONArray().put(jsonObject);
}
return asArrayEvents;
}
private static String setUpECOMPLoggingForRequest() {
final UUID uuid = UUID.randomUUID();
LoggingContext localLC = VESLogger.getLoggingContextForThread(uuid);
localLC.put(EcompFields.kBeginTimestampMs, SaClock.now());
return uuid.toString();
}
private static boolean isBatchRequest(String request) {
return request.contains("eventBatch");
}
}
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