Java tutorial
/******************************************************************************* * Copyright (c) 2009, 2010 Tasktop Technologies and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Tasktop Technologies - initial API and implementation *******************************************************************************/ package org.eclipse.mylyn.internal.oslc.core.client; import java.io.IOException; import java.io.InputStream; import java.io.UnsupportedEncodingException; import java.net.URLEncoder; import java.util.ArrayList; import java.util.Collection; import java.util.Iterator; import java.util.List; import java.util.Set; import org.apache.commons.httpclient.Credentials; import org.apache.commons.httpclient.Header; import org.apache.commons.httpclient.HostConfiguration; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.HttpMethodBase; import org.apache.commons.httpclient.URIException; import org.apache.commons.httpclient.auth.AuthScope; import org.apache.commons.httpclient.cookie.CookiePolicy; import org.apache.commons.httpclient.methods.GetMethod; import org.apache.commons.httpclient.methods.PostMethod; import org.apache.commons.httpclient.methods.PutMethod; import org.apache.commons.httpclient.methods.StringRequestEntity; import org.eclipse.core.runtime.CoreException; import org.eclipse.core.runtime.IProgressMonitor; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.core.runtime.SubProgressMonitor; import org.eclipse.mylyn.commons.net.AbstractWebLocation; import org.eclipse.mylyn.commons.net.AuthenticationCredentials; import org.eclipse.mylyn.commons.net.AuthenticationType; import org.eclipse.mylyn.commons.net.Policy; import org.eclipse.mylyn.commons.net.WebUtil; import org.eclipse.mylyn.internal.oslc.core.IOslcCoreConstants; import org.eclipse.mylyn.internal.oslc.core.OslcCreationDialogDescriptor; import org.eclipse.mylyn.internal.oslc.core.OslcSelectionDialogDescriptor; import org.eclipse.mylyn.internal.oslc.core.OslcServiceDescriptor; import org.eclipse.mylyn.internal.oslc.core.OslcServiceFactory; import org.eclipse.mylyn.internal.oslc.core.OslcServiceProvider; import org.eclipse.mylyn.internal.oslc.core.OslcServiceProviderCatalog; import org.eclipse.mylyn.internal.oslc.core.ServiceHome; import org.eclipse.mylyn.internal.oslc.core.cm.AbstractChangeRequest; import org.eclipse.mylyn.tasks.core.RepositoryResponse; import org.eclipse.mylyn.tasks.core.RepositoryResponse.ResponseKind; import org.eclipse.mylyn.tasks.core.data.TaskAttribute; import org.eclipse.mylyn.tasks.core.data.TaskAttributeMapper; import org.eclipse.mylyn.tasks.core.data.TaskData; import org.jdom.Attribute; import org.jdom.Document; import org.jdom.Element; import org.jdom.JDOMException; import org.jdom.filter.ElementFilter; import org.jdom.input.SAXBuilder; import org.jdom.output.Format; import org.jdom.output.XMLOutputter; /** * Base class from which to implement an OSLC client * * @author Robert Elves */ public abstract class AbstractOslcClient { private static final String UTF_8 = "UTF-8"; //$NON-NLS-1$ protected final AbstractWebLocation location; protected final HttpClient httpClient; protected final OslcServiceDescriptor configuration; public AbstractOslcClient(AbstractWebLocation location, OslcServiceDescriptor data) { this.location = location; this.httpClient = createHttpClient(); this.configuration = data; configureHttpCredentials(location); } protected void configureHttpCredentials(AbstractWebLocation location) { AuthScope authScope = new AuthScope(WebUtil.getHost(location.getUrl()), WebUtil.getPort(location.getUrl()), null, AuthScope.ANY_SCHEME); AuthenticationCredentials credentials = location.getCredentials(AuthenticationType.REPOSITORY); if (credentialsValid(credentials)) { Credentials creds = WebUtil.getHttpClientCredentials(credentials, WebUtil.getHost(location.getUrl())); httpClient.getState().setCredentials(authScope, creds); this.httpClient.getParams().setAuthenticationPreemptive(true); } else { httpClient.getState().clearCredentials(); } } protected boolean credentialsValid(AuthenticationCredentials credentials) { return credentials != null && credentials.getUserName().length() > 0; } protected HttpClient createHttpClient() { HttpClient httpClient = new HttpClient(); httpClient.setHttpConnectionManager(WebUtil.getConnectionManager()); httpClient.getParams().setCookiePolicy(CookiePolicy.RFC_2109); // See: https://jazz.net/jazz/web/projects/Rational%20Team%20Concert#action=com.ibm.team.workitem.viewWorkItem&id=85127\ // Added to support fix session cookie issue when talking to tomcat httpClient.getParams().setParameter("http.protocol.single-cookie-header", true); //$NON-NLS-1$ WebUtil.configureHttpClient(httpClient, getUserAgent()); return httpClient; } /** * Return your unique connector identifier i.e. com.mycompany.myconnector */ public abstract String getUserAgent(); /** * Exposed at connector level via IOslcCoreConnector.getAvailableServices() */ public List<OslcServiceProvider> getAvailableServices(String url, IProgressMonitor monitor) throws CoreException { RequestHandler<List<OslcServiceProvider>> handler = new RequestHandler<List<OslcServiceProvider>>( "Requesting Available Services") { //$NON-NLS-1$ @Override public List<OslcServiceProvider> run(HttpMethodBase method, IProgressMonitor monitor) throws CoreException { try { final List<OslcServiceProvider> result = new ArrayList<OslcServiceProvider>(); parseServices(method.getResponseBodyAsStream(), result, monitor); return result; } catch (IOException e) { throw new CoreException(new Status(IStatus.ERROR, IOslcCoreConstants.ID_PLUGIN, "Network error occurred retrieving available services: " + e.getMessage(), e)); //$NON-NLS-1$ } } }; return executeMethod(createGetMethod(url), handler, monitor); } protected Document getDocumentFromMethod(HttpMethodBase method) throws CoreException { try { return getDocumentFromStream(method.getResponseBodyAsStream()); } catch (IOException e) { throw new CoreException(new Status(IStatus.ERROR, IOslcCoreConstants.ID_PLUGIN, "Network error obtaining response from server: " + e.getMessage(), e)); //$NON-NLS-1$ } } protected Document getDocumentFromStream(InputStream inStream) throws CoreException { SAXBuilder builder = new SAXBuilder(); builder.setExpandEntities(false); try { return builder.build(inStream); } catch (JDOMException e) { throw new CoreException(new Status(IStatus.ERROR, IOslcCoreConstants.ID_PLUGIN, "Error parsing response: " + e.getMessage(), e)); //$NON-NLS-1$ } catch (IOException e) { throw new CoreException(new Status(IStatus.ERROR, IOslcCoreConstants.ID_PLUGIN, "Network error parsing response: " + e.getMessage(), e)); //$NON-NLS-1$ } } /** * public for testing */ public void parseServices(InputStream inStream, Collection<OslcServiceProvider> providers, IProgressMonitor monitor) throws CoreException { Document doc = getDocumentFromStream(inStream); Iterator<?> itr = doc .getDescendants(new ElementFilter(IOslcCoreConstants.ELEMENT_SERVICE_PROVIDER_CATALOG)); while (itr.hasNext()) { Element element = (Element) itr.next(); if (element != doc.getRootElement()) { Attribute attrAbout = element.getAttribute(IOslcCoreConstants.ATTRIBUTE_ABOUT, IOslcCoreConstants.NAMESPACE_RDF); String title = element.getChild(IOslcCoreConstants.ELEMENT_TITLE, IOslcCoreConstants.NAMESPACE_DC) .getText(); if (attrAbout != null && attrAbout.getValue().length() > 0) { providers.add(new OslcServiceProviderCatalog(title, attrAbout.getValue())); } } } itr = doc.getDescendants(new ElementFilter(IOslcCoreConstants.ELEMENT_SERVICE_PROVIDER)); while (itr.hasNext()) { Element element = (Element) itr.next(); String title = element.getChild(IOslcCoreConstants.ELEMENT_TITLE, IOslcCoreConstants.NAMESPACE_DC) .getText(); Element service = element.getChild(IOslcCoreConstants.ELEMENT_SERVICES, IOslcCoreConstants.NAMESPACE_OSLC_DISCOVERY_1_0); if (service != null) { String resource = service.getAttributeValue(IOslcCoreConstants.ATTRIBUTE_RESOURCE, IOslcCoreConstants.NAMESPACE_RDF); providers.add(new OslcServiceProvider(title, resource)); } } } /** * Retrieve a service descriptor for the given service provider. Exposed at connector level by * IOslcConnector.getServiceDescriptor() * * @throws CoreException */ public OslcServiceDescriptor getServiceDescriptor(OslcServiceProvider provider, IProgressMonitor monitor) throws CoreException { OslcServiceDescriptor configuration = new OslcServiceDescriptor(provider.getUrl()); downloadServiceDescriptor(configuration, monitor); return configuration; } /** * Populate the provided configuration with new data from the remote repository. */ protected void downloadServiceDescriptor(final OslcServiceDescriptor config, IProgressMonitor monitor) throws CoreException { RequestHandler<OslcServiceDescriptor> handler = new RequestHandler<OslcServiceDescriptor>( "Retrieving Service Descriptor") { //$NON-NLS-1$ @Override public OslcServiceDescriptor run(HttpMethodBase method, IProgressMonitor monitor) throws CoreException, IOException { config.clear(); parseServiceDescriptor(method.getResponseBodyAsStream(), config, monitor); return config; } }; executeMethod(createGetMethod(config.getAboutUrl()), handler, monitor); } /** * public for testing */ public void parseServiceDescriptor(InputStream inStream, OslcServiceDescriptor config, IProgressMonitor monitor) throws CoreException { Document doc = getDocumentFromStream(inStream); Iterator<?> itr = doc.getDescendants( new ElementFilter(IOslcCoreConstants.ELEMENT_TITLE, IOslcCoreConstants.NAMESPACE_DC)); if (itr.hasNext()) { Element element = (Element) itr.next(); config.setTitle(element.getText()); } itr = doc.getDescendants( new ElementFilter(IOslcCoreConstants.ELEMENT_DESCRIPTION, IOslcCoreConstants.NAMESPACE_DC)); if (itr.hasNext()) { Element element = (Element) itr.next(); config.setDescription(element.getText()); } itr = doc.getDescendants(new ElementFilter(IOslcCoreConstants.ELEMENT_CREATIONDIALOG, IOslcCoreConstants.NAMESPACE_OSLC_CM_1_0)); while (itr.hasNext()) { boolean isDefault = false; Element element = (Element) itr.next(); String label = element.getChild(IOslcCoreConstants.ELEMENT_TITLE, IOslcCoreConstants.NAMESPACE_DC) .getText(); String url = element.getChild(IOslcCoreConstants.ELEMENT_URL, IOslcCoreConstants.NAMESPACE_OSLC_CM_1_0) .getText(); Attribute attrDefault = element.getAttribute(IOslcCoreConstants.ATTRIBUTE_DEFAULT, IOslcCoreConstants.NAMESPACE_OSLC_CM_1_0); if (attrDefault != null && attrDefault.getValue().equals("true")) { //$NON-NLS-1$ isDefault = true; } OslcCreationDialogDescriptor recordType = new OslcCreationDialogDescriptor(label, url); config.addCreationDialog(recordType); if (isDefault) { config.setDefaultCreationDialog(recordType); } } itr = doc.getDescendants(new ElementFilter(IOslcCoreConstants.ELEMENT_SIMPLEQUERY)); if (itr.hasNext()) { Element element = (Element) itr.next(); String url = element.getChild(IOslcCoreConstants.ELEMENT_URL, IOslcCoreConstants.NAMESPACE_OSLC_CM_1_0) .getText(); if (url != null) { config.setSimpleQueryUrl(url); } } itr = doc.getDescendants(new ElementFilter(IOslcCoreConstants.ELEMENT_FACTORY)); while (itr.hasNext()) { boolean isDefault = false; Element element = (Element) itr.next(); String title = element.getChild(IOslcCoreConstants.ELEMENT_TITLE, IOslcCoreConstants.NAMESPACE_DC) .getText(); String url = element.getChild(IOslcCoreConstants.ELEMENT_URL, IOslcCoreConstants.NAMESPACE_OSLC_CM_1_0) .getText(); Attribute attrDefault = element.getAttribute(IOslcCoreConstants.ATTRIBUTE_DEFAULT, IOslcCoreConstants.NAMESPACE_OSLC_CM_1_0); if (attrDefault != null && attrDefault.getValue().equals("true")) { //$NON-NLS-1$ isDefault = true; } OslcServiceFactory factory = new OslcServiceFactory(title, url); if (isDefault) { config.setDefaultFactory(factory); } config.addServiceFactory(factory); } itr = doc.getDescendants(new ElementFilter(IOslcCoreConstants.ELEMENT_HOME)); if (itr.hasNext()) { Element element = (Element) itr.next(); Element childTitle = element.getChild(IOslcCoreConstants.ELEMENT_TITLE, IOslcCoreConstants.NAMESPACE_DC); Element childUrl = element.getChild(IOslcCoreConstants.ELEMENT_URL, IOslcCoreConstants.NAMESPACE_OSLC_CM_1_0); if (childTitle != null && childTitle.getText().length() > 0 && childUrl != null && childUrl.getText().length() > 0) { ServiceHome home = new ServiceHome(childTitle.getText(), childUrl.getText()); config.setHome(home); } } itr = doc.getDescendants(new ElementFilter(IOslcCoreConstants.ELEMENT_SELECTIONDIALOG)); if (itr.hasNext()) { Element element = (Element) itr.next(); Element childTitle = element.getChild(IOslcCoreConstants.ELEMENT_TITLE, IOslcCoreConstants.NAMESPACE_DC); Element childUrl = element.getChild(IOslcCoreConstants.ELEMENT_URL, IOslcCoreConstants.NAMESPACE_OSLC_CM_1_0); if (childTitle != null && childTitle.getText().length() > 0 && childUrl != null && childUrl.getText().length() > 0) { OslcSelectionDialogDescriptor selection = new OslcSelectionDialogDescriptor(childTitle.getText(), childUrl.getText()); String isDefault = element.getAttributeValue(IOslcCoreConstants.ATTRIBUTE_DEFAULT, IOslcCoreConstants.NAMESPACE_OSLC_CM_1_0); if (isDefault != null) { selection.setDefault(isDefault.equals("true")); //$NON-NLS-1$ } String hintHeight = element.getAttributeValue(IOslcCoreConstants.ATTRIBUTE_HINTHEIGHT, IOslcCoreConstants.NAMESPACE_OSLC_CM_1_0); if (hintHeight != null) { selection.setHintHeight(hintHeight); } String hintWidth = element.getAttributeValue(IOslcCoreConstants.ATTRIBUTE_HINTWIDTH, IOslcCoreConstants.NAMESPACE_OSLC_CM_1_0); if (hintWidth != null) { selection.setHintWidth(hintWidth); } String label = element.getChildText(IOslcCoreConstants.ELEMENT_LABEL, IOslcCoreConstants.NAMESPACE_OSLC_CM_1_0); if (label != null) { selection.setLabel(label); } config.addSelectionDialog(selection); } } } protected OslcServiceDescriptor getConfiguration(IProgressMonitor monitor) throws CoreException { monitor = Policy.monitorFor(monitor); if (configuration.getFactories().isEmpty()) { updateRepositoryConfiguration(new SubProgressMonitor(monitor, 1)); } return configuration; } public Collection<AbstractChangeRequest> performQuery(String query, IProgressMonitor monitor) throws CoreException { try { query = URLEncoder.encode(query, "UTF-8"); //$NON-NLS-1$ } catch (UnsupportedEncodingException e) { query = URLEncoder.encode(query); } final String requestUrl = getConfiguration(monitor).getSimpleQueryUrl() + "?oslc_cm.query=" + query; //$NON-NLS-1$ RequestHandler<Collection<AbstractChangeRequest>> handler = new RequestHandler<Collection<AbstractChangeRequest>>( "Performing Query") { //$NON-NLS-1$ @Override public Collection<AbstractChangeRequest> run(HttpMethodBase method, IProgressMonitor monitor) throws CoreException, IOException { Collection<AbstractChangeRequest> result = new ArrayList<AbstractChangeRequest>(); parseQueryResponse(method.getResponseBodyAsStream(), result, monitor); return result; } }; return executeMethod(createGetMethod(requestUrl), handler, monitor); } // TODO: Handle pagination public void parseQueryResponse(InputStream inStream, Collection<AbstractChangeRequest> requests, IProgressMonitor monitor) throws CoreException { Document doc = getDocumentFromStream(inStream); Iterator<?> itr = doc.getDescendants(new ElementFilter(IOslcCoreConstants.ELEMENT_CHANGEREQUEST, IOslcCoreConstants.NAMESPACE_OSLC_CM_1_0)); while (itr.hasNext()) { Element element = (Element) itr.next(); String title = element.getChildText(IOslcCoreConstants.ELEMENT_TITLE, IOslcCoreConstants.NAMESPACE_DC); String id = element.getChildText(IOslcCoreConstants.ELEMENT_IDENTIFIER, IOslcCoreConstants.NAMESPACE_DC); if (title != null && id != null) { AbstractChangeRequest request = createChangeRequest(id, title); request.setType( element.getChildText(IOslcCoreConstants.ELEMENT_TYPE, IOslcCoreConstants.NAMESPACE_DC)); request.setDescription(element.getChildText(IOslcCoreConstants.ELEMENT_DESCRIPTION, IOslcCoreConstants.NAMESPACE_DC)); request.setSubject( element.getChildText(IOslcCoreConstants.ELEMENT_SUBJECT, IOslcCoreConstants.NAMESPACE_DC)); request.setCreator( element.getChildText(IOslcCoreConstants.ELEMENT_CREATOR, IOslcCoreConstants.NAMESPACE_DC)); request.setModified( element.getChildText(IOslcCoreConstants.ELEMENT_MODIFIED, IOslcCoreConstants.NAMESPACE_DC)); requests.add(request); } } } protected abstract AbstractChangeRequest createChangeRequest(String id, String title); /** * Updates this clients 'repository configuration'. If old types were in use (locally cached) and still exist they * are re-read from repository. */ public void updateRepositoryConfiguration(IProgressMonitor monitor) throws CoreException { configuration.clear(); downloadServiceDescriptor(configuration, monitor); } public abstract TaskData getTaskData(final String encodedTaskId, TaskAttributeMapper mapper, IProgressMonitor monitor) throws CoreException; public abstract RepositoryResponse putTaskData(TaskData taskData, Set<TaskAttribute> oldValues, IProgressMonitor monitor) throws CoreException; public RepositoryResponse postTaskData(TaskData taskData, IProgressMonitor monitor) throws CoreException { Element root = new Element(IOslcCoreConstants.ELEMENT_CHANGEREQUEST, IOslcCoreConstants.NAMESPACE_OSLC_CM_1_0); final Document doc = new Document(root); TaskAttribute attribute = taskData.getRoot().getMappedAttribute(IOslcCoreConstants.ELEMENT_TITLE); if (attribute != null) { // TODO: Store namespace on attribute Element e = new Element(attribute.getId(), IOslcCoreConstants.NAMESPACE_DC); e.setText(attribute.getValue()); root.addContent(e); } attribute = taskData.getRoot().getMappedAttribute(IOslcCoreConstants.ELEMENT_DESCRIPTION); if (attribute != null) { Element e = new Element(attribute.getId(), IOslcCoreConstants.NAMESPACE_DC); e.setText(attribute.getValue()); root.addContent(e); } attribute = taskData.getRoot().getMappedAttribute(IOslcCoreConstants.ELEMENT_TYPE); if (attribute != null) { Element e = new Element(attribute.getId(), IOslcCoreConstants.NAMESPACE_DC); e.setText(attribute.getValue()); root.addContent(e); } attribute = taskData.getRoot().getMappedAttribute(IOslcCoreConstants.ELEMENT_SUBJECT); if (attribute != null) { Element e = new Element(attribute.getId(), IOslcCoreConstants.NAMESPACE_DC); e.setText(attribute.getValue()); root.addContent(e); } // For RTC Tests attribute = taskData.getRoot().getMappedAttribute("filedAgainst"); //$NON-NLS-1$ if (attribute != null) { Element e = new Element(attribute.getId(), IOslcCoreConstants.NAMESPACE_RTC_CM_1_0); e.setText(attribute.getValue()); root.addContent(e); } PostMethod method = createPostMethod(getConfiguration(monitor).getDefaultFactory().getUrl()); method.setRequestHeader("Accept", "application/x-oslc-cm-change-request+xml"); //$NON-NLS-1$ //$NON-NLS-2$ method.setRequestHeader("Content-Type", "application/x-oslc-cm-change-request+xml"); //$NON-NLS-1$ //$NON-NLS-2$ XMLOutputter out = new XMLOutputter(Format.getCompactFormat()); try { method.setRequestEntity(new StringRequestEntity(out.outputString(doc), IOslcCoreConstants.CONTENT_TYPE_CHANGE_REQUEST, UTF_8)); } catch (UnsupportedEncodingException e1) { throw new CoreException(new Status(IStatus.ERROR, IOslcCoreConstants.ID_PLUGIN, "Error creating new change request: " + e1.getMessage(), e1)); //$NON-NLS-1$ } RequestHandler<RepositoryResponse> handler = new RequestHandler<RepositoryResponse>("Creating") { //$NON-NLS-1$ @Override public RepositoryResponse run(HttpMethodBase method, IProgressMonitor monitor) throws CoreException { Header header = method.getResponseHeader("Location"); //$NON-NLS-1$ if (header != null && header.getValue() != null) { String location = header.getValue(); // TODO: delegate extraction of 'task id' to protected method and add to repository response return new RepositoryResponse(ResponseKind.TASK_CREATED, location); } return null; } }; return executeMethod(method, handler, monitor); } protected GetMethod createGetMethod(String requestPath) { GetMethod method = new GetMethod(getRequestPath(requestPath)); method.setFollowRedirects(true); method.setDoAuthentication(true); // application/xml is returned by oslc servers by default (but some may not play nice) method.setRequestHeader("Accept", "application/xml"); //$NON-NLS-1$ //$NON-NLS-2$ return method; } protected PostMethod createPostMethod(String requestPath) { PostMethod method = new PostMethod(getRequestPath(requestPath)); method.setFollowRedirects(false); method.setDoAuthentication(true); // this.entity = getRequestEntity(method); // if (pairs != null) { // method.setRequestBody(pairs); // } else if (entity != null) { // method.setRequestEntity(entity); // } else { // StatusHandler.log(new Status(IStatus.WARNING, IOslcCoreConstants.ID_PLUGIN, // "Request body or entity missing upon post.")); // } return method; } protected PutMethod createPutMethod(String requestPath) { PutMethod method = new PutMethod(getRequestPath(requestPath)); method.setFollowRedirects(false); method.setDoAuthentication(true); return method; } protected <T> T executeMethod(HttpMethodBase method, RequestHandler<T> handler, IProgressMonitor monitor) throws CoreException { monitor = Policy.monitorFor(monitor); try { monitor.beginTask(handler.getRequestName(), IProgressMonitor.UNKNOWN); HostConfiguration hostConfiguration = WebUtil.createHostConfiguration(httpClient, location, monitor); int code = WebUtil.execute(httpClient, hostConfiguration, method, monitor); handleReturnCode(code, method); return handler.run(method, monitor); } catch (IOException e) { throw new CoreException(new Status(IStatus.WARNING, IOslcCoreConstants.ID_PLUGIN, "An unexpected network error has occurred: " + e.getMessage(), e)); //$NON-NLS-1$ } finally { if (method != null) { WebUtil.releaseConnection(method, monitor); } monitor.done(); } } public String getRequestPath(String repositoryUrl) { if (repositoryUrl.startsWith("./")) { //$NON-NLS-1$ return WebUtil.getRequestPath(location.getUrl()) + repositoryUrl.substring(1); } else if (repositoryUrl.startsWith("/")) { //$NON-NLS-1$ return WebUtil.getRequestPath(location.getUrl()) + repositoryUrl; } return WebUtil.getRequestPath(repositoryUrl); } protected void handleReturnCode(int code, HttpMethodBase method) throws CoreException { try { if (code == java.net.HttpURLConnection.HTTP_OK) { return;// Status.OK_STATUS; } else if (code == java.net.HttpURLConnection.HTTP_MOVED_TEMP || code == java.net.HttpURLConnection.HTTP_CREATED) { // A new resource created... return;// Status.OK_STATUS; } else if (code == java.net.HttpURLConnection.HTTP_UNAUTHORIZED || code == java.net.HttpURLConnection.HTTP_FORBIDDEN) { throw new CoreException(new Status(IStatus.ERROR, IOslcCoreConstants.ID_PLUGIN, "Unable to log into server, ensure repository credentials are correct.")); //$NON-NLS-1$ } else if (code == java.net.HttpURLConnection.HTTP_PRECON_FAILED) { // Mid-air collision throw new CoreException( new Status(IStatus.ERROR, IOslcCoreConstants.ID_PLUGIN, "Mid-air collision occurred.")); //$NON-NLS-1$ } else if (code == java.net.HttpURLConnection.HTTP_CONFLICT) { throw new CoreException( new Status(IStatus.ERROR, IOslcCoreConstants.ID_PLUGIN, "A conflict occurred.")); //$NON-NLS-1$ } else { throw new CoreException(new Status(IStatus.ERROR, IOslcCoreConstants.ID_PLUGIN, "Unknown error occurred. Http Code: " + code + " Request: " + method.getURI() //$NON-NLS-1$//$NON-NLS-2$ + " Response: " //$NON-NLS-1$ + method.getResponseBodyAsString())); } } catch (URIException e) { throw new CoreException(new Status(IStatus.ERROR, IOslcCoreConstants.ID_PLUGIN, "Network Error: " //$NON-NLS-1$ + e.getMessage())); } catch (IOException e) { throw new CoreException(new Status(IStatus.ERROR, IOslcCoreConstants.ID_PLUGIN, "Network Error: " //$NON-NLS-1$ + e.getMessage())); } } public abstract class RequestHandler<T> { private final String requestName; public RequestHandler(String requestName) { this.requestName = requestName; } public abstract T run(HttpMethodBase method, IProgressMonitor monitor) throws CoreException, IOException; public String getRequestName() { return requestName; } } }