Revision 5332
Added by Matt Jones almost 14 years ago
| src/edu/ucsb/nceas/metacat/restservice/ResourceHandler.java | ||
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*/ |
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package edu.ucsb.nceas.metacat.restservice; |
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import java.io.ByteArrayOutputStream; |
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import java.io.IOException; |
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import java.io.InputStream; |
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import java.io.OutputStream; |
| ... | ... | |
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import org.dataone.service.types.SystemMetadata; |
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import org.jibx.runtime.BindingDirectory; |
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import org.jibx.runtime.IBindingFactory; |
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import org.jibx.runtime.IMarshallingContext; |
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import org.jibx.runtime.IUnmarshallingContext; |
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import org.jibx.runtime.JiBXException; |
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|
| ... | ... | |
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* API Resources |
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*/ |
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private static final String RESOURCE_OBJECTS = "object"; |
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private static final String RESOURCE_META = "/meta"; |
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private static final String RESOURCE_SESSION = "session"; |
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private static final String RESOURCE_IDENTIFIER = "identifier"; |
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|
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logMetacat.debug("D1 Rest: Starting resource processing...");
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loadSessionData(); |
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boolean isSysmetaRequest = false; |
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String objectId = request.getPathInfo(); |
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if (objectId != null && objectId.length() > 1) |
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if (objectId != null && objectId.length() > 1) {
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objectId = request.getPathInfo().substring(1); //trim the slash |
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// Check if this is a request for SystemMetadata |
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// TODO: Note that this REST uri means that GUIDs can not contain the RESOURCE_META string |
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int start = objectId.indexOf(RESOURCE_META); |
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if (start >= 0) {
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logMetacat.debug("Pruning meta at start value: " + start);
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objectId = objectId.substring(0, start); |
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logMetacat.debug("New objectId for meta is: " + objectId);
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isSysmetaRequest = true; |
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} |
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} |
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logMetacat.debug("Processing objectId: " + objectId);
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logMetacat.debug("verb:" + httpVerb);
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logMetacat.debug("objectId:" + objectId);
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if (httpVerb == GET) {
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getObject(objectId); |
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if (isSysmetaRequest) {
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getSystemMetadataObject(objectId); |
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} else {
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getObject(objectId); |
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} |
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status = true; |
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} else if (httpVerb == POST) {
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putObject(objectId, FUNCTION_NAME_INSERT); |
| ... | ... | |
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} |
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/** |
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* Implements REST version of DataONE CRUD API --> getSystemMetadata |
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* @param guid ID of data object to be read |
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*/ |
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private void getSystemMetadataObject(String guid) {
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CrudService cs = new CrudService(servletContext, request, response); |
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AuthToken token = null; |
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OutputStream out = null; |
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try {
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out = response.getOutputStream(); |
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Identifier id = new Identifier(); |
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id.setValue(guid); |
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SystemMetadata sysmeta = cs.getSystemMetadata(token, id); |
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logMetacat.debug("Got sysmeta for: " + sysmeta.getIdentifier().getValue());
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// Serialize and write it to the output stream |
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try {
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IBindingFactory bfact = BindingDirectory.getFactory(SystemMetadata.class); |
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IMarshallingContext mctx = bfact.createMarshallingContext(); |
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mctx.marshalDocument(sysmeta, "UTF-8", null, out); |
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} catch (JiBXException e) {
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throw new ServiceFailure(1190, "Failed to serialize SystemMetadata: " + e.getMessage()); |
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} |
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} catch (BaseException e) {
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serializeException(e, out); |
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} catch (IOException e) {
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ServiceFailure sf = new ServiceFailure(1030, e.getMessage()); |
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serializeException(sf, out); |
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} finally {
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IOUtils.closeQuietly(out); |
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} |
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} |
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/** |
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* Earthgrid API > Query Service > Query Function : translates ecogrid query document to metacat query |
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* then calls DBQuery > createResultDocument function and then again translate resultset to ecogrid resultset |
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* |
| src/edu/ucsb/nceas/metacat/dataone/CrudService.java | ||
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import org.jibx.runtime.BindingDirectory; |
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import org.jibx.runtime.IBindingFactory; |
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import org.jibx.runtime.IMarshallingContext; |
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import org.jibx.runtime.IUnmarshallingContext; |
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import org.jibx.runtime.JiBXException; |
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import com.gc.iotools.stream.is.InputStreamFromOutputStream; |
| ... | ... | |
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throws InvalidToken, ServiceFailure, NotAuthorized, NotFound, |
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InvalidRequest, NotImplemented {
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// TODO: Look up ID of system metadata based on guid |
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logMetacat.debug("CrudService.getSystemMetadata - for guid: " + guid.getValue());
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// Retrieve the session information from the AuthToken |
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// If the session is expired, then the user is 'public' |
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final SessionData sessionData = getSessionData(token); |
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// TODO: Check access control rules |
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try {
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IdentifierManager im = IdentifierManager.getInstance(); |
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// This is a test id of an existing sysmeta document -- for temporary testing |
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String testGuid = "autogen.20101192441566.1"; |
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// TODO: Look up ID of system metadata based on guid |
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// TODO: Initially from document, later from entry in table? |
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// TODO: Read system metadata from disk and create SystemMetadata object |
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// TODO: Follows same implementation plan as get() |
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// TODO: return it |
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throw new NotImplemented(1000, "This method not yet implemented."); |
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// String localId = im.getLocalId(guid.getValue()); |
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final String localId = im.getLocalId(testGuid); |
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// Read system metadata from metacat's db |
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final InputStreamFromOutputStream<String> objectStream = |
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new InputStreamFromOutputStream<String>() {
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@Override |
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public String produce(final OutputStream dataSink) throws Exception {
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try {
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handler.readFromMetacat(request.getRemoteAddr(), null, |
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dataSink, localId, "xml", |
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sessionData.getUserName(), |
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sessionData.getGroupNames(), true, params); |
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} catch (PropertyNotFoundException e) {
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throw new ServiceFailure(1030, e.getMessage()); |
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} catch (ClassNotFoundException e) {
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throw new ServiceFailure(1030, e.getMessage()); |
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} catch (IOException e) {
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throw new ServiceFailure(1030, e.getMessage()); |
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} catch (SQLException e) {
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throw new ServiceFailure(1030, e.getMessage()); |
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} catch (McdbException e) {
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throw new ServiceFailure(1030, e.getMessage()); |
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} catch (ParseLSIDException e) {
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throw new NotFound(1020, e.getMessage()); |
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} catch (InsufficientKarmaException e) {
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throw new NotAuthorized(1000, "Not authorized for get()."); |
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} |
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return "Completed"; |
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} |
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}; |
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// Deserialize the xml to create a SystemMetadata object |
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SystemMetadata sysmeta = deserializeSystemMetadata(objectStream); |
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return sysmeta; |
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} catch (McdbDocNotFoundException e) {
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throw new NotFound(1000, e.getMessage()); |
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} |
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} |
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public Identifier update(AuthToken token, Identifier guid, |
| ... | ... | |
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handler.handleInsertOrUpdateAction(request.getRemoteAddr(), response, |
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pw, params, sessionData.getUserName(), |
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sessionData.getGroupNames()); |
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logMetacat.debug(new String(output.toByteArray())); |
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String outputS = new String(output.toByteArray()); |
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logMetacat.debug("CrudService.insertDocument - Metacat returned: " + outputS);
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// if (!(outputS.indexOf("<success>") > 0 && outputS.indexOf(localId) > 0)) {
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// throw new ServiceFailure(1190, outputS); |
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// } |
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logMetacat.debug("Finsished inserting xml document.");
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} |
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private ByteArrayOutputStream serializeSystemMetadata(SystemMetadata sysmeta)
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public static ByteArrayOutputStream serializeSystemMetadata(SystemMetadata sysmeta)
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throws ServiceFailure {
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IBindingFactory bfact; |
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ByteArrayOutputStream sysmetaOut = null; |
| ... | ... | |
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return sysmetaOut; |
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} |
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public static SystemMetadata deserializeSystemMetadata(InputStream xml) |
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throws ServiceFailure {
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try {
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IBindingFactory bfact = BindingDirectory.getFactory(SystemMetadata.class); |
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IUnmarshallingContext uctx = bfact.createUnmarshallingContext(); |
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SystemMetadata sysmeta = (SystemMetadata) uctx.unmarshalDocument(xml, null); |
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return sysmeta; |
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} catch (JiBXException e) {
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throw new ServiceFailure(1190, "Failed to serialize and insert SystemMetadata: " + e.getMessage()); |
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} |
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} |
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} |
Also available in: Unified diff
Added initial implementation of getSystemMetadata and its associated REST service. Current implementation is returning a hardcoded system metadata document -- need to look up the real document for each guid and return that.