forked from apache/olingo-odata4
-
Notifications
You must be signed in to change notification settings - Fork 0
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
3 changed files
with
139 additions
and
9 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
122 changes: 122 additions & 0 deletions
122
samples/server/src/main/java/org/apache/olingo/server/sample/CustomDefaultProcessor.java
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,122 @@ | ||
| package org.apache.olingo.server.sample; | ||
|
|
||
| import java.io.ByteArrayInputStream; | ||
| import java.nio.charset.Charset; | ||
|
|
||
| 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.ODataServerError; | ||
| import org.apache.olingo.server.api.ServiceMetadata; | ||
| import org.apache.olingo.server.api.etag.ETagHelper; | ||
| import org.apache.olingo.server.api.etag.ServiceMetadataETagSupport; | ||
| import org.apache.olingo.server.api.processor.ErrorProcessor; | ||
| import org.apache.olingo.server.api.processor.MetadataProcessor; | ||
| import org.apache.olingo.server.api.processor.ServiceDocumentProcessor; | ||
| import org.apache.olingo.server.api.serializer.ODataSerializer; | ||
| import org.apache.olingo.server.api.uri.UriInfo; | ||
|
|
||
| /** | ||
| * <p>Processor implementation for handling default cases: | ||
| * <ul><li>request for the metadata document</li> | ||
| * <li>request for the service document</li> | ||
| * <li>error handling</li></ul></p> | ||
| * <p>This implementation is registered in the ODataHandler by default. | ||
| * The default can be replaced by re-registering a custom implementation.</p> | ||
| */ | ||
| public class CustomDefaultProcessor implements MetadataProcessor, ServiceDocumentProcessor, ErrorProcessor { | ||
| private OData odata; | ||
| private ServiceMetadata serviceMetadata; | ||
|
|
||
| @Override | ||
| public void init(final OData odata, final ServiceMetadata serviceMetadata) { | ||
| this.odata = odata; | ||
| this.serviceMetadata = serviceMetadata; | ||
| } | ||
|
|
||
| @Override | ||
| public void readServiceDocument(final ODataRequest request, final ODataResponse response, final UriInfo uriInfo, | ||
| final ContentType requestedContentType) throws ODataApplicationException, ODataLibraryException { | ||
| boolean isNotModified = false; | ||
| ServiceMetadataETagSupport eTagSupport = serviceMetadata.getServiceMetadataETagSupport(); | ||
| if (eTagSupport != null && eTagSupport.getServiceDocumentETag() != null) { | ||
| // Set application etag at response | ||
| response.setHeader(HttpHeader.ETAG, eTagSupport.getServiceDocumentETag()); | ||
| // Check if service document has been modified | ||
| ETagHelper eTagHelper = odata.createETagHelper(); | ||
| isNotModified = eTagHelper.checkReadPreconditions(eTagSupport.getServiceDocumentETag(), request | ||
| .getHeaders(HttpHeader.IF_MATCH), request.getHeaders(HttpHeader.IF_NONE_MATCH)); | ||
| } | ||
|
|
||
| // Send the correct response | ||
| if (isNotModified) { | ||
| response.setStatusCode(HttpStatusCode.NOT_MODIFIED.getStatusCode()); | ||
| } else { | ||
| // HTTP HEAD requires no payload but a 200 OK response | ||
| if (HttpMethod.HEAD == request.getMethod()) { | ||
| response.setStatusCode(HttpStatusCode.OK.getStatusCode()); | ||
| } else { | ||
| ODataSerializer serializer = odata.createSerializer(requestedContentType); | ||
| //response.setContent(serializer.serviceDocument(serviceMetadata, null); | ||
| response.setContent(serializer.serviceDocument(serviceMetadata, request.getRawBaseUri()).getContent()); | ||
| response.setStatusCode(HttpStatusCode.OK.getStatusCode()); | ||
| response.setHeader(HttpHeader.CONTENT_TYPE, requestedContentType.toContentTypeString()); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public void readMetadata(final ODataRequest request, final ODataResponse response, final UriInfo uriInfo, | ||
| final ContentType requestedContentType) throws ODataApplicationException, ODataLibraryException { | ||
| boolean isNotModified = false; | ||
| ServiceMetadataETagSupport eTagSupport = serviceMetadata.getServiceMetadataETagSupport(); | ||
| if (eTagSupport != null && eTagSupport.getMetadataETag() != null) { | ||
| // Set application etag at response | ||
| response.setHeader(HttpHeader.ETAG, eTagSupport.getMetadataETag()); | ||
| // Check if metadata document has been modified | ||
| ETagHelper eTagHelper = odata.createETagHelper(); | ||
| isNotModified = eTagHelper.checkReadPreconditions(eTagSupport.getMetadataETag(), request | ||
| .getHeaders(HttpHeader.IF_MATCH), request.getHeaders(HttpHeader.IF_NONE_MATCH)); | ||
| } | ||
|
|
||
| // Send the correct response | ||
| if (isNotModified) { | ||
| response.setStatusCode(HttpStatusCode.NOT_MODIFIED.getStatusCode()); | ||
| } else { | ||
| // HTTP HEAD requires no payload but a 200 OK response | ||
| if (HttpMethod.HEAD == request.getMethod()) { | ||
| response.setStatusCode(HttpStatusCode.OK.getStatusCode()); | ||
| } else { | ||
| ODataSerializer serializer = odata.createSerializer(requestedContentType); | ||
| response.setContent(serializer.metadataDocument(serviceMetadata).getContent()); | ||
| response.setStatusCode(HttpStatusCode.OK.getStatusCode()); | ||
| response.setHeader(HttpHeader.CONTENT_TYPE, requestedContentType.toContentTypeString()); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| @Override | ||
| public void processError(final ODataRequest request, final ODataResponse response, | ||
| final ODataServerError serverError, | ||
| final ContentType requestedContentType) { | ||
| try { | ||
| ODataSerializer serializer = odata.createSerializer(requestedContentType); | ||
| response.setContent(serializer.error(serverError).getContent()); | ||
| response.setStatusCode(serverError.getStatusCode()); | ||
| response.setHeader(HttpHeader.CONTENT_TYPE, requestedContentType.toContentTypeString()); | ||
| } catch (Exception e) { | ||
| // This should never happen but to be sure we have this catch here to prevent sending a stacktrace to a client. | ||
| String responseContent = | ||
| "{\"error\":{\"code\":null,\"message\":\"An unexpected exception occurred during error processing\"}}"; | ||
| response.setContent(new ByteArrayInputStream(responseContent.getBytes(Charset.forName("utf-8")))); | ||
| response.setStatusCode(HttpStatusCode.INTERNAL_SERVER_ERROR.getStatusCode()); | ||
| response.setHeader(HttpHeader.CONTENT_TYPE, ContentType.APPLICATION_JSON.toContentTypeString()); | ||
| } | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters