| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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 |
| * |
| * 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. |
| */ |
| package org.apache.olingo.server.core.requests; |
| |
| import java.io.InputStream; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.UUID; |
| |
| import org.apache.olingo.commons.api.format.ContentType; |
| import org.apache.olingo.commons.api.http.HttpHeader; |
| import org.apache.olingo.commons.api.http.HttpMethod; |
| import org.apache.olingo.commons.api.http.HttpStatusCode; |
| import org.apache.olingo.server.api.OData; |
| import org.apache.olingo.server.api.ODataApplicationException; |
| import org.apache.olingo.server.api.ODataLibraryException; |
| import org.apache.olingo.server.api.ODataRequest; |
| import org.apache.olingo.server.api.ODataResponse; |
| import org.apache.olingo.server.api.ServiceMetadata; |
| import org.apache.olingo.server.api.deserializer.batch.BatchDeserializerException; |
| import org.apache.olingo.server.api.deserializer.batch.BatchOptions; |
| import org.apache.olingo.server.api.deserializer.batch.BatchRequestPart; |
| import org.apache.olingo.server.api.deserializer.batch.ODataResponsePart; |
| import org.apache.olingo.server.core.ContentNegotiatorException; |
| import org.apache.olingo.server.core.ServiceDispatcher; |
| import org.apache.olingo.server.core.ServiceHandler; |
| import org.apache.olingo.server.core.ServiceRequest; |
| import org.apache.olingo.server.core.batchhandler.referenceRewriting.BatchReferenceRewriter; |
| import org.apache.olingo.server.core.deserializer.batch.BatchParserCommon; |
| |
| public class BatchRequest extends ServiceRequest { |
| private static final String PREFERENCE_CONTINUE_ON_ERROR = "odata.continue-on-error"; |
| private final BatchReferenceRewriter rewriter; |
| |
| public BatchRequest(OData odata, ServiceMetadata serviceMetadata) { |
| super(odata, serviceMetadata); |
| this.rewriter = new BatchReferenceRewriter(); |
| } |
| |
| @Override |
| public void execute(ServiceHandler handler, ODataResponse response) |
| throws ODataLibraryException, ODataApplicationException { |
| |
| // check for valid HTTP Verb |
| assertHttpMethod(response); |
| |
| validateContentType(); |
| boolean continueOnError = isContinueOnError(); |
| final String boundary = extractBoundary(getRequestContentType()); |
| |
| final BatchOptions options = BatchOptions.with().rawBaseUri(request.getRawBaseUri()) |
| .rawServiceResolutionUri(this.request.getRawServiceResolutionUri()).build(); |
| |
| final List<BatchRequestPart> parts = this.odata.createFixedFormatDeserializer() |
| .parseBatchRequest(request.getBody(), boundary, options); |
| |
| ODataResponsePart partResponse = null; |
| final List<ODataResponsePart> responseParts = new ArrayList<ODataResponsePart>(); |
| |
| for (BatchRequestPart part : parts) { |
| if (part.isChangeSet()) { |
| String txnId = null; |
| try { |
| txnId = handler.startTransaction(); |
| partResponse = processChangeSet(part, handler); |
| if (partResponse.getResponses().get(0).getStatusCode() >= 400) { |
| handler.rollback(txnId); |
| } else { |
| handler.commit(txnId); |
| } |
| } catch(ODataLibraryException e) { |
| if (txnId != null) { |
| handler.rollback(txnId); |
| } |
| throw e; |
| } catch (ODataApplicationException e) { |
| if (txnId != null) { |
| handler.rollback(txnId); |
| } |
| throw e; |
| } |
| } else { |
| // single request, a static request |
| ODataRequest partRequest = part.getRequests().get(0); |
| partResponse = process(partRequest, handler); |
| } |
| responseParts.add(partResponse); |
| |
| // on error, should we continue? |
| final int statusCode = partResponse.getResponses().get(0).getStatusCode(); |
| if ((statusCode >= 400 && statusCode <= 600) && !continueOnError) { |
| break; |
| } |
| } |
| |
| // send response |
| final String responseBoundary = "batch_" + UUID.randomUUID().toString(); |
| ; |
| final InputStream responseContent = odata.createFixedFormatSerializer().batchResponse( |
| responseParts, responseBoundary); |
| response.setHeader(HttpHeader.CONTENT_TYPE, ContentType.MULTIPART_MIXED + ";boundary=" |
| + responseBoundary); |
| response.setContent(responseContent); |
| response.setStatusCode(HttpStatusCode.ACCEPTED.getStatusCode()); |
| } |
| |
| ODataResponsePart process(ODataRequest partRequest, ServiceHandler serviceHandler) { |
| ODataResponse partResponse = executeSingleRequest(partRequest, serviceHandler); |
| addContentID(partRequest, partResponse); |
| return new ODataResponsePart(partResponse, false); |
| } |
| |
| ODataResponsePart processChangeSet(BatchRequestPart partRequest, ServiceHandler serviceHandler) |
| throws BatchDeserializerException { |
| List<ODataResponse> changeSetResponses = new ArrayList<ODataResponse>(); |
| // change set need to be a in a atomic operation |
| for (ODataRequest changeSetPartRequest : partRequest.getRequests()) { |
| |
| this.rewriter.replaceReference(changeSetPartRequest); |
| |
| ODataResponse partResponse = executeSingleRequest(changeSetPartRequest, serviceHandler); |
| |
| this.rewriter.addMapping(changeSetPartRequest, partResponse); |
| addContentID(changeSetPartRequest, partResponse); |
| |
| if (partResponse.getStatusCode() < 400) { |
| changeSetResponses.add(partResponse); |
| } else { |
| // 11.7.4 Responding to a Batch Request |
| return new ODataResponsePart(partResponse, false); |
| } |
| } |
| return new ODataResponsePart(changeSetResponses, true); |
| } |
| |
| ODataResponse executeSingleRequest(ODataRequest singleRequest, ServiceHandler handler) { |
| ServiceDispatcher dispatcher = new ServiceDispatcher(this.odata, this.serviceMetadata, handler, |
| this.customContentType); |
| ODataResponse res = new ODataResponse(); |
| dispatcher.execute(singleRequest, res); |
| return res; |
| } |
| |
| private void addContentID(ODataRequest batchPartRequest, ODataResponse batchPartResponse) { |
| final String contentId = batchPartRequest.getHeader(HttpHeader.CONTENT_ID); |
| if (contentId != null) { |
| batchPartResponse.setHeader(HttpHeader.CONTENT_ID, contentId); |
| } |
| } |
| |
| @Override |
| public HttpMethod[] allowedMethods() { |
| return new HttpMethod[] {HttpMethod.POST}; |
| } |
| |
| private void validateContentType() throws ODataApplicationException { |
| final ContentType contentType = getRequestContentType(); |
| if (contentType == null || !contentType.isCompatible(ContentType.MULTIPART_MIXED)) { |
| throw new ODataApplicationException("Invalid content type", |
| HttpStatusCode.BAD_REQUEST.getStatusCode(), Locale.getDefault()); |
| } |
| } |
| |
| @Override |
| public ContentType getResponseContentType() throws ContentNegotiatorException { |
| return null; |
| } |
| |
| private boolean isContinueOnError() { |
| final List<String> preferValues = this.request.getHeaders(HttpHeader.PREFER); |
| |
| if (preferValues != null) { |
| for (final String preference : preferValues) { |
| if (PREFERENCE_CONTINUE_ON_ERROR.equals(preference)) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| private String extractBoundary(ContentType contentType) throws BatchDeserializerException { |
| return BatchParserCommon.getBoundary(contentType.toContentTypeString(), 0); |
| } |
| } |