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/**
* ============LICENSE_START=======================================================
* org.onap.aai
* ================================================================================
* Copyright © 2017-2018 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.aai.rest;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map.Entry;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.Consumes;
import javax.ws.rs.PUT;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;
import javax.ws.rs.core.UriBuilder;
import javax.ws.rs.core.UriInfo;
import org.javatuples.Pair;
import org.onap.aai.config.SpringContextAware;
import org.onap.aai.dbmap.DBConnectionType;
import org.onap.aai.exceptions.AAIException;
import org.onap.aai.introspection.Introspector;
import org.onap.aai.introspection.Loader;
import org.onap.aai.introspection.ModelType;
import org.onap.aai.setup.SchemaVersion;
import org.onap.aai.introspection.exceptions.AAIUnmarshallingException;
import org.onap.aai.logging.ErrorObjectNotFoundException;
import org.onap.aai.logging.LoggingContext;
import org.onap.aai.parsers.query.QueryParser;
import org.onap.aai.rest.bulk.BulkOperation;
import org.onap.aai.rest.bulk.BulkOperationResponse;
import org.onap.aai.rest.db.DBRequest;
import org.onap.aai.rest.db.HttpEntry;
import org.onap.aai.rest.util.ValidateEncoding;
import org.onap.aai.restcore.HttpMethod;
import org.onap.aai.restcore.RESTAPI;
import org.onap.aai.serialization.engines.QueryStyle;
import org.onap.aai.serialization.engines.TransactionalGraphEngine;
import org.onap.aai.util.AAIConfig;
import org.onap.aai.util.AAIConstants;
import org.springframework.web.util.UriComponents;
import org.springframework.web.util.UriComponentsBuilder;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.google.gson.JsonSyntaxException;
/**
* The Class BulkAddConsumer.
*/
/*
* The purpose of this endpoint is to allow a client to add
* multiple objects with one request. It may take
* one or more transaction objects containing one or more
* objects to add.
* The transactions are independent of each other -
* if one fails, its effects are rolled back, but the others' aren't.
* Within a single transaction, if adding one object fails, all the others'
* changes are rolled back.
*/
public abstract class BulkConsumer extends RESTAPI {
private static final String BULK_PATCH_METHOD = "patch";
private static final String BULK_DELETE_METHOD = "delete";
private static final String BULK_PUT_METHOD = "put";
private static final String TARGET_ENTITY = "aai-resources";
/** The introspector factory type. */
private ModelType introspectorFactoryType = ModelType.MOXY;
/** The query style. */
private QueryStyle queryStyle = QueryStyle.TRAVERSAL_URI;
/**
* Bulk add.
*
* @param content the content
* @param versionParam the version param
* @param uri the uri
* @param headers the headers
* @param info the info
* @param req the req
* @return the response
*/
@PUT
@Consumes({ MediaType.APPLICATION_JSON})
@Produces({ MediaType.APPLICATION_JSON})
public Response bulkProcessor(String content, @PathParam("version")String versionParam, @Context HttpHeaders headers, @Context UriInfo info, @Context HttpServletRequest req){
String transId = headers.getRequestHeaders().getFirst("X-TransactionId");
String sourceOfTruth = headers.getRequestHeaders().getFirst("X-FromAppId");
String realTime = headers.getRequestHeaders().getFirst("Real-Time");
String outputMediaType = getMediaType(headers.getAcceptableMediaTypes());
SchemaVersion version = new SchemaVersion(versionParam);
Response response = null;
try {
DBConnectionType type = this.determineConnectionType(sourceOfTruth, realTime);
String serviceName = req.getMethod() + " " + req.getRequestURI().toString();
LoggingContext.requestId(transId);
LoggingContext.partnerName(sourceOfTruth);
LoggingContext.serviceName(serviceName);
LoggingContext.targetEntity(TARGET_ENTITY);
LoggingContext.targetServiceName(serviceName);
/* A Response will be generated for each object in each transaction.
* To keep track of what came from where to give organized feedback to the client,
* we keep responses from a given transaction together in one list (hence all being a list of lists)
* and BulkOperationResponse each response with its matching URI (which will be null if there wasn't one).
*/
List<List<BulkOperationResponse>> allResponses = new ArrayList<>();
JsonArray transactions = getTransactions(content, headers);
for (int i = 0; i < transactions.size(); i++){
HttpEntry resourceHttpEntry = SpringContextAware.getBean("traversalUriHttpEntry", HttpEntry.class);
resourceHttpEntry.setHttpEntryProperties(version, type);
Loader loader = resourceHttpEntry.getLoader();
TransactionalGraphEngine dbEngine = resourceHttpEntry.getDbEngine();
URI thisUri = null;
List<BulkOperation> bulkOperations = new ArrayList<>();
HttpMethod method = null;
JsonElement transObj = new JsonObject();
try {
transObj = transactions.get(i);
if (!transObj.isJsonObject()) {
throw new AAIException("AAI_6111", "input payload does not follow bulk interface");
}
fillBulkOperationsObjectFromTransaction(bulkOperations, transObj.getAsJsonObject(), loader, dbEngine, outputMediaType);
if (bulkOperations.isEmpty()) {
//case where user sends a validly formatted transactions object but
//which has no actual things in it for A&AI to do anything with
//assuming we should count this as a user error
throw new AAIException("AAI_6118", "payload had no objects to operate on");
}
List<DBRequest> requests = new ArrayList<>();
for (BulkOperation bulkOperation : bulkOperations){
thisUri = bulkOperation.getUri();
method = bulkOperation.getHttpMethod();
QueryParser uriQuery = dbEngine.getQueryBuilder().createQueryFromURI(thisUri);
DBRequest request = new DBRequest.Builder(method, thisUri, uriQuery, bulkOperation.getIntrospector(), headers, bulkOperation.getUriInfo(), transId).rawRequestContent(bulkOperation.getRawReq()).build();
requests.add(request);
}
Pair<Boolean, List<Pair<URI, Response>>> results = resourceHttpEntry.process(requests, sourceOfTruth, this.enableResourceVersion());
List<BulkOperationResponse> responses = BulkOperationResponse.processPairList(method, results.getValue1());
allResponses.add(responses);
if (results.getValue0()) { //everything was processed without error
dbEngine.commit();
} else { //something failed
dbEngine.rollback();
}
} catch (Exception e) {
/* While httpEntry.process handles its exceptions, exceptions thrown in earlier helpers
* bubbles up to here. As we want to tie error messages to the URI of the object that caused
* them, we catch here, generate a Response, bundle it with that URI, and move on.
*/
if (!bulkOperations.isEmpty()) { //failed somewhere in the middle of bulkOperation-filling
BulkOperation lastBulkOperation = bulkOperations.get(bulkOperations.size()-1); //last one in there was the problem
if (lastBulkOperation.getIntrospector() == null){
//failed out before thisUri could be set but after bulkOperations started being filled
thisUri = lastBulkOperation.getUri();
method = lastBulkOperation.getHttpMethod();
}
} //else failed out on empty payload so bulkOperations never filled (or failed out even earlier than bulkOperations-filling)
if (method == null) {
List<String> methods = transObj.getAsJsonObject().entrySet().stream().map(Entry::getKey).collect(Collectors.toCollection(ArrayList::new));
if (methods.contains(BULK_PUT_METHOD)) {
method = HttpMethod.PUT;
} else if (methods.contains(BULK_DELETE_METHOD)) {
method = HttpMethod.DELETE;
} else if (methods.contains(BULK_PATCH_METHOD)) {
method = HttpMethod.MERGE_PATCH;
} else {
method = HttpMethod.PUT;
}
}
addExceptionCaseFailureResponse(allResponses, e, i, thisUri, headers, info, method);
dbEngine.rollback();
continue; /* if an exception gets thrown within a transaction we want to keep going to
the next transaction, not break out of the whole request */
}
}
String returnPayload = generateResponsePayload(allResponses);
//unless a top level error gets thrown, we want to 201 bc the client wanted a "fire and forget" kind of setup
response = Response
.status(Status.CREATED)
.entity(returnPayload)
.build();
} catch (AAIException e) { //these catches needed for handling top level errors in payload parsing where the whole request must fail out
response = consumerExceptionResponseGenerator(headers, info, HttpMethod.PUT, e);
} catch(JsonSyntaxException e) {
AAIException ex = new AAIException("AAI_6111");
response = consumerExceptionResponseGenerator(headers, info, HttpMethod.PUT, ex);
} catch (Exception e ) {
AAIException ex = new AAIException("AAI_4000", e);
response = consumerExceptionResponseGenerator(headers, info, HttpMethod.PUT, ex);
}
return response;
}
/**
* Gets the transactions.
*
* @param content - input JSON payload string
* @return JsonArray - the array of transactions
* @throws AAIException the AAI exception
* @throws JsonSyntaxException Parses and breaks the single payload into an array of individual transaction
* bodies to be processed.
*/
private JsonArray getTransactions(String content, HttpHeaders headers) throws AAIException, JsonSyntaxException {
JsonParser parser = new JsonParser();
JsonObject input = parser.parse(content).getAsJsonObject();
String module = getModule();
if (!(input.has("transactions"))) {
throw new AAIException("AAI_6118", String.format("input payload does not follow %s interface - missing \"transactions\"", module));
}
JsonElement transactionsObj = input.get("transactions");
if (!(transactionsObj.isJsonArray())){
throw new AAIException("AAI_6111", String.format("input payload does not follow %s interface", module));
}
JsonArray transactions = transactionsObj.getAsJsonArray();
validateRequest(transactions, headers);
return transactions;
}
/**
* Fill object bulkOperations from transaction.
*
* @param bulkOperations the bulkOperations
* @param transaction - JSON body containing the objects to be added
* each object must have a URI and an object body
* @param loader the loader
* @param dbEngine the db engine
* @param inputMediaType the input media type
* @return list of bulkOperations containing each introspector-wrapped object and its given URI
* @throws AAIException the AAI exception
* @throws JsonSyntaxException the json syntax exception
* @throws UnsupportedEncodingException Walks through the given transaction and unmarshals each object in it, then bundles each
* with its URI.
*/
private void fillBulkOperationsObjectFromTransaction(List<BulkOperation> bulkOperations,
JsonObject transaction, Loader loader, TransactionalGraphEngine dbEngine, String inputMediaType)
throws AAIException, JsonSyntaxException, UnsupportedEncodingException {
if (transaction.has(BULK_PUT_METHOD) && this.functionAllowed(HttpMethod.PUT)) {
populateBulkOperations(bulkOperations, transaction, loader, dbEngine, inputMediaType, HttpMethod.PUT);
} else if (transaction.has(BULK_DELETE_METHOD) && this.functionAllowed(HttpMethod.DELETE)) {
populateBulkOperations(bulkOperations, transaction, loader, dbEngine, inputMediaType, HttpMethod.DELETE);
} else if (transaction.has(BULK_PATCH_METHOD) && this.functionAllowed(HttpMethod.MERGE_PATCH)) {
populateBulkOperations(bulkOperations, transaction, loader, dbEngine, inputMediaType, HttpMethod.MERGE_PATCH);
} else {
String msg = "input payload does not follow bulk %s interface - missing %s";
String type = "process";
String operations = "put delete or patch";
if (this instanceof BulkAddConsumer) {
type = "add";
operations = BULK_PUT_METHOD;
}
throw new AAIException("AAI_6118", String.format(msg, type, operations));
}
}
private void populateBulkOperations(List<BulkOperation> bulkOperations, JsonObject item, Loader loader, TransactionalGraphEngine dbEngine, String inputMediaType, HttpMethod method) throws AAIException, JsonSyntaxException, UnsupportedEncodingException{
String module = getModule();
for (int i=0; i<item.size(); i++) {
BulkOperation bulkOperation = new BulkOperation();
try {
if (!(item.isJsonObject())) {
throw new AAIException("AAI_6111", String.format("input payload does not follow %s interface", module));
}
JsonElement actionElement = null;
if(item.has(BULK_PUT_METHOD)){
actionElement = item.get(BULK_PUT_METHOD);
} else if(item.has(BULK_PATCH_METHOD)){
actionElement = item.get(BULK_PATCH_METHOD);
} else if(item.has(BULK_DELETE_METHOD)){
actionElement = item.get(BULK_DELETE_METHOD);
}
if ((actionElement == null) || !actionElement.isJsonArray()) {
throw new AAIException("AAI_6111", String.format("input payload does not follow %s interface", module));
}
JsonArray httpArray = actionElement.getAsJsonArray();
for (int j = 0; j < httpArray.size(); ++j) {
bulkOperation = new BulkOperation();
bulkOperation.setHttpMethod(method);
JsonObject it = httpArray.get(j).getAsJsonObject();
JsonElement itemURIfield = it.get("uri");
if (itemURIfield == null) {
throw new AAIException("AAI_6118", "must include object uri");
}
UriComponents uriComponents = UriComponentsBuilder.fromUriString(itemURIfield.getAsString()).build();
if (uriComponents.getPath().endsWith("/relationship-list/relationship")) {
if (method.equals(HttpMethod.PUT)) {
bulkOperation.setHttpMethod(HttpMethod.PUT_EDGE);
} else if (method.equals(HttpMethod.DELETE)) {
bulkOperation.setHttpMethod(HttpMethod.DELETE_EDGE);
}
} else {
bulkOperation.setHttpMethod(method);
}
URI uri = UriBuilder.fromPath(uriComponents.getPath()).build();
/* adding the uri as soon as we have one (valid or not) lets us
* keep any errors with their corresponding uris for client feedback
*/
bulkOperation.setUri(uri);
bulkOperation.addUriInfoQueryParams(uriComponents.getQueryParams());
if (!ValidateEncoding.getInstance().validate(uri)) {
throw new AAIException("AAI_3008", "uri=" + uri.getPath());
}
JsonElement bodyObj = new JsonObject();
if (!bulkOperation.getHttpMethod().equals(HttpMethod.DELETE)) {
if (!(it.has("body"))){
throw new AAIException("AAI_6118", String.format("input payload does not follow %s interface - missing \"body\"", module));
}
bodyObj = it.get("body");
if (!(bodyObj.isJsonObject())) {
throw new AAIException("AAI_6111", String.format("input payload does not follow %s interface", module));
}
}
Gson gson = new Gson();
String bodyStr = gson.toJson(bodyObj);
bulkOperation.setRawReq(bodyStr);
if (bulkOperation.getHttpMethod().equals(HttpMethod.PUT_EDGE) || bulkOperation.getHttpMethod().equals(HttpMethod.DELETE_EDGE)) {
Introspector obj;
try {
obj = loader.unmarshal("relationship", bodyStr, org.onap.aai.restcore.MediaType.getEnum(inputMediaType));
} catch (AAIUnmarshallingException e) {
throw new AAIException("AAI_3000", "object could not be unmarshalled:" + bodyStr);
}
bulkOperation.setIntrospector(obj);
} else {
QueryParser uriQuery = dbEngine.getQueryBuilder().createQueryFromURI(uri);
String objName = uriQuery.getResultType();
Introspector obj;
if (bulkOperation.getHttpMethod().equals(HttpMethod.DELETE)) {
obj = loader.introspectorFromName(objName);
} else {
try {
obj = loader.unmarshal(objName, bodyStr, org.onap.aai.restcore.MediaType.getEnum(inputMediaType));
} catch (AAIUnmarshallingException e) {
throw new AAIException("AAI_3000", "object could not be unmarshalled:" + bodyStr);
}
this.validateIntrospector(obj, loader, uri, bulkOperation.getHttpMethod());
}
bulkOperation.setIntrospector(obj);
}
bulkOperations.add(bulkOperation);
}
} catch (AAIException e) {
// even if bulkOperation doesn't have a uri or body, this way we keep all information associated with this error together
// even if both are null, that indicates how the input was messed up, so still useful to carry around like this
bulkOperations.add(bulkOperation);
throw e; //rethrow so the right response is generated on the level above
}
}
}
/**
* Generate response payload.
*
* @param allResponses - the list of the lists of responses from every action in every transaction requested
* @return A json string of similar format to the bulk add interface which for each response includes
* the original URI and a body with the status code of the response and the error message.
*
* Creates the payload for a single unified response from all responses generated
*/
private String generateResponsePayload(List<List<BulkOperationResponse>> allResponses){
JsonObject ret = new JsonObject();
JsonArray retArr = new JsonArray();
for(List<BulkOperationResponse> responses : allResponses){
JsonObject tResp = new JsonObject();
JsonArray tArrResp = new JsonArray();
HttpMethod method = HttpMethod.PUT;
for (BulkOperationResponse r : responses) {
JsonObject indPayload = new JsonObject();
method = r.getHttpMethod();
URI origURI = r.getUri();
if (origURI != null) {
indPayload.addProperty("uri", origURI.getPath());
} else {
indPayload.addProperty("uri", (String)null);
}
JsonObject body = new JsonObject();
int rStatus = r.getResponse().getStatus();
String rContents = null;
rContents = (String)r.getResponse().getEntity();
body.addProperty(Integer.toString(rStatus), rContents);
indPayload.add("body", body);
tArrResp.add(indPayload);
}
tResp.add(this.mapHttpMethodToBulkMethod(method), tArrResp);
retArr.add(tResp);
}
ret.add("transaction", retArr);
Gson gson = new GsonBuilder().serializeNulls().create();
return gson.toJson(ret);
}
private String mapHttpMethodToBulkMethod(HttpMethod method) {
if (HttpMethod.PUT.equals(method) || HttpMethod.PUT_EDGE.equals(method)) {
return BULK_PUT_METHOD;
} else if (HttpMethod.DELETE.equals(method) || HttpMethod.DELETE_EDGE.equals(method)) {
return BULK_DELETE_METHOD;
} else if (HttpMethod.MERGE_PATCH.equals(method)) {
return BULK_PATCH_METHOD;
} else {
return "";
}
}
/**
* Adds the exception case failure response.
*
* @param allResponses the all responses
* @param e the e
* @param index - index of which transaction was being processed when the exception was thrown
* @param thisUri the this uri
* @param headers the headers
* @param info the info
* @param templateAction the template action
* @param logline Generates a Response based on the given exception and adds it to the collection of responses for this request.
* @throws ErrorObjectNotFoundException
*/
private void addExceptionCaseFailureResponse(List<List<BulkOperationResponse>> allResponses, Exception e, int index, URI thisUri, HttpHeaders headers, UriInfo info, HttpMethod templateAction) {
AAIException ex = null;
if (!(e instanceof AAIException)){
ex = new AAIException("AAI_4000", e);
} else {
ex = (AAIException)e;
}
if (allResponses.size() != (index+1)) {
//index+1 bc if all transactions thus far have had a response list added
//the size will be one more than the current index (since those are offset by 1)
//this transaction doesn't have a response list yet, so create one
Response failResp = consumerExceptionResponseGenerator(headers, info, templateAction, ex);
BulkOperationResponse uriResp = new BulkOperationResponse(templateAction, thisUri, failResp);
List<BulkOperationResponse> transRespList = new ArrayList<>();
transRespList.add(uriResp);
allResponses.add(transRespList);
} else {
//this transaction already has a response list, so add this failure response to it
Response failResp = consumerExceptionResponseGenerator(headers, info, templateAction, ex);
BulkOperationResponse uriResp = new BulkOperationResponse(templateAction, thisUri, failResp);
List<BulkOperationResponse> tResps = allResponses.get(index);
tResps.add(uriResp);
}
}
/**
* Pulls the config value for the limit of operations allowed in a bulk add/process request
*
* @throws AAIException
*/
private int getPayLoadLimit() throws AAIException{
return Integer.parseInt(AAIConfig.get(AAIConstants.AAI_BULKCONSUMER_LIMIT));
}
/**
* Validates the amount of operations in a request payload is allowed
*
* @param transactions - a JsonArray of all the transactions in the request payload
* @throws AAIException
*/
private void validateRequest(JsonArray transactions, HttpHeaders headers) throws AAIException{
String overrideLimit = headers.getRequestHeaders().getFirst("X-OverrideLimit");
boolean isOverride = overrideLimit != null && !AAIConfig.get(AAIConstants.AAI_BULKCONSUMER_OVERRIDE_LIMIT).equals("false")
&& overrideLimit.equals(AAIConfig.get(AAIConstants.AAI_BULKCONSUMER_OVERRIDE_LIMIT));
if (transactions.size() == 0) {
//case where user sends a validly formatted transactions object but
//which has no actual things in it for A&AI to do anything with
//assuming we should count this as a user error
throw new AAIException("AAI_6118", "payload had no objects to operate on");
}else if(!isOverride && transactions.size() > getPayLoadLimit()) {
throw new AAIException("AAI_6147", String.format("Payload limit of %s reached, please reduce payload.", getPayLoadLimit()));
}
if(!isOverride) {
int operationCount = 0;
int payLoadLimit = getPayLoadLimit();
for (int i = 0; i < transactions.size(); i++) {
Set<Entry<String, JsonElement>> entrySet = transactions.get(i).getAsJsonObject().entrySet();
Iterator<Entry<String, JsonElement>> it = entrySet.iterator();
while (it.hasNext()) {
Map.Entry<String, JsonElement> element = it.next();
if (element.getValue() instanceof JsonArray) {
operationCount += ((JsonArray) element.getValue()).size();
} else {
operationCount++;
}
}
if (operationCount > payLoadLimit) {
throw new AAIException("AAI_6147", String.format("Payload limit of %s reached, please reduce payload.", payLoadLimit));
}
}
}
}
protected abstract String getModule();
protected abstract boolean functionAllowed(HttpMethod method);
protected abstract boolean enableResourceVersion();
}
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