Java tutorial
/* * Copyright 2012 JBoss Inc * * 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. */ package org.overlord.dtgov.ui.server.servlets; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.inject.Inject; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileItemFactory; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.commons.io.FileUtils; import org.apache.commons.io.FilenameUtils; import org.apache.commons.io.IOUtils; import org.codehaus.jackson.JsonEncoding; import org.codehaus.jackson.JsonFactory; import org.codehaus.jackson.JsonGenerator; import org.oasis_open.docs.s_ramp.ns.s_ramp_v1.BaseArtifactType; import org.overlord.dtgov.ui.server.i18n.Messages; import org.overlord.dtgov.ui.server.services.sramp.SrampApiClientAccessor; import org.overlord.dtgov.ui.server.util.ExceptionUtils; import org.overlord.sramp.atom.archive.SrampArchive; import org.overlord.sramp.atom.archive.expand.DefaultMetaDataFactory; import org.overlord.sramp.atom.archive.expand.ZipToSrampArchive; import org.overlord.sramp.atom.archive.expand.registry.ZipToSrampArchiveRegistry; import org.overlord.sramp.atom.err.SrampAtomException; import org.overlord.sramp.common.ArtifactType; /** * A standard servlet that artifact content is POSTed to in order to add new artifacts * to the s-ramp repository. * * @author eric.wittmann@redhat.com */ public class DeploymentUploadServlet extends HttpServlet { private static final long serialVersionUID = DeploymentUploadServlet.class.hashCode(); @Inject private SrampApiClientAccessor clientAccessor; /** * Constructor. */ public DeploymentUploadServlet() { } /** * @see javax.servlet.http.HttpServlet#doPost(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse) */ @SuppressWarnings("unchecked") @Override protected void doPost(HttpServletRequest req, HttpServletResponse response) throws ServletException, IOException { // Extract the relevant content from the POST'd form if (ServletFileUpload.isMultipartContent(req)) { Map<String, String> responseMap; FileItemFactory factory = new DiskFileItemFactory(); ServletFileUpload upload = new ServletFileUpload(factory); // Parse the request String deploymentType = null; String version = null; String fileName = null; InputStream artifactContent = null; try { List<FileItem> items = upload.parseRequest(req); for (FileItem item : items) { if (item.isFormField()) { if (item.getFieldName().equals("deploymentType")) { //$NON-NLS-1$ deploymentType = item.getString(); } else if (item.getFieldName().equals("version")) { //$NON-NLS-1$ version = item.getString(); } } else { fileName = item.getName(); if (fileName != null) fileName = FilenameUtils.getName(fileName); artifactContent = item.getInputStream(); } } // Default version is 1.0 if (version == null || version.trim().length() == 0) { version = "1.0"; //$NON-NLS-1$ } // Now that the content has been extracted, process it (upload the artifact to the s-ramp repo). responseMap = uploadArtifact(deploymentType, fileName, version, artifactContent); } catch (SrampAtomException e) { responseMap = new HashMap<String, String>(); responseMap.put("exception", "true"); //$NON-NLS-1$ //$NON-NLS-2$ responseMap.put("exception-message", e.getMessage()); //$NON-NLS-1$ responseMap.put("exception-stack", ExceptionUtils.getRootStackTrace(e)); //$NON-NLS-1$ } catch (Throwable e) { responseMap = new HashMap<String, String>(); responseMap.put("exception", "true"); //$NON-NLS-1$ //$NON-NLS-2$ responseMap.put("exception-message", e.getMessage()); //$NON-NLS-1$ responseMap.put("exception-stack", ExceptionUtils.getRootStackTrace(e)); //$NON-NLS-1$ } finally { IOUtils.closeQuietly(artifactContent); } writeToResponse(responseMap, response); } else { response.sendError(HttpServletResponse.SC_UNSUPPORTED_MEDIA_TYPE, Messages.i18n.format("DeploymentUploadServlet.ContentTypeInvalid")); //$NON-NLS-1$ } } /** * Upload the artifact to the S-RAMP repository. * @param deploymentType the type of the deployment (from the UI form) * @param fileName the file name of the deployment being uploaded * @param version the artifact version * @param deploymentContent the content of the deployment * @throws Exception */ private Map<String, String> uploadArtifact(String deploymentType, String fileName, String version, InputStream deploymentContent) throws Exception { if (deploymentContent == null) throw new Exception(Messages.i18n.format("DeploymentUploadServlet.NoDeploymentFile")); //$NON-NLS-1$ File tempFile = stashResourceContent(deploymentContent); Map<String, String> responseParams = new HashMap<String, String>(); if (deploymentType.indexOf('/') != -1) { deploymentType = deploymentType.substring(deploymentType.indexOf('/') + 1); } try { if ("DeploymentBundle".equals(deploymentType)) { //$NON-NLS-1$ uploadBundle(tempFile, responseParams); } else { uploadSingleDeployment(deploymentType, fileName, tempFile, responseParams, version); } } finally { FileUtils.deleteQuietly(tempFile); } return responseParams; } /** * Uploads an S-RAMP package to the repository. * @param tempFile * @param responseParams */ private void uploadBundle(File tempFile, Map<String, String> responseParams) throws Exception { // TODO the bundle should probably be just a .zip containing a bunch of artifacts? or should it be an actual s-ramp archive? SrampArchive archive = null; try { archive = new SrampArchive(tempFile); Map<String, ?> batch = clientAccessor.getClient().uploadBatch(archive); int numSuccess = 0; int numFailed = 0; for (String key : batch.keySet()) { Object object = batch.get(key); if (object instanceof BaseArtifactType) { numSuccess++; } else { numFailed++; } } // TODO turn these things into constants responseParams.put("batch", "true"); //$NON-NLS-1$ //$NON-NLS-2$ responseParams.put("batchTotal", String.valueOf(numSuccess + numFailed)); //$NON-NLS-1$ responseParams.put("batchNumSuccess", String.valueOf(numSuccess)); //$NON-NLS-1$ responseParams.put("batchNumFailed", String.valueOf(numFailed)); //$NON-NLS-1$ } finally { SrampArchive.closeQuietly(archive); } } /** * Uploads a single deployment to S-RAMP. * @param deploymentType * @param fileName * @param client * @param tempFile * @param responseParams * @param version * @throws Exception */ private void uploadSingleDeployment(String deploymentType, String fileName, File tempFile, Map<String, String> responseParams, String version) throws Exception { ArtifactType at = ArtifactType.valueOf(deploymentType); String uuid = null; // First, upload the deployment InputStream contentStream = null; try { contentStream = FileUtils.openInputStream(tempFile); BaseArtifactType artifact = at.newArtifactInstance(); artifact.setName(fileName); artifact.setVersion(version); artifact = clientAccessor.getClient().uploadArtifact(artifact, contentStream); responseParams.put("model", at.getArtifactType().getModel()); //$NON-NLS-1$ responseParams.put("type", at.getArtifactType().getType()); //$NON-NLS-1$ responseParams.put("uuid", artifact.getUuid()); //$NON-NLS-1$ uuid = artifact.getUuid(); } finally { IOUtils.closeQuietly(contentStream); } // Try to expand the artifact (works if an expander is available for the given artifact type). ZipToSrampArchive j2sramp = null; SrampArchive archive = null; try { j2sramp = ZipToSrampArchiveRegistry.createExpander(at, tempFile); if (j2sramp != null) { j2sramp.setContextParam(DefaultMetaDataFactory.PARENT_UUID, uuid); archive = j2sramp.createSrampArchive(); clientAccessor.getClient().uploadBatch(archive); } } finally { SrampArchive.closeQuietly(archive); ZipToSrampArchive.closeQuietly(j2sramp); } } /** * Make a temporary copy of the resource by saving the content to a temp file. * @param resourceInputStream * @throws IOException */ private File stashResourceContent(InputStream resourceInputStream) throws IOException { File resourceTempFile = null; OutputStream oStream = null; try { resourceTempFile = File.createTempFile("dtgov-ui-upload", ".tmp"); //$NON-NLS-1$ //$NON-NLS-2$ oStream = FileUtils.openOutputStream(resourceTempFile); IOUtils.copy(resourceInputStream, oStream); return resourceTempFile; } catch (IOException e) { FileUtils.deleteQuietly(resourceTempFile); throw e; } finally { IOUtils.closeQuietly(resourceInputStream); IOUtils.closeQuietly(oStream); } } /** * Writes the response values back to the http response. This allows the calling code to * parse the response values for display to the user. * * @param responseMap the response params to write to the http response * @param response the http response * @throws IOException */ private void writeToResponse(Map<String, String> responseMap, HttpServletResponse response) throws IOException { // Note: setting the content-type to text/html because otherwise IE prompt the user to download // the result rather than handing it off to the GWT form response handler. // See JIRA issue https://issues.jboss.org/browse/SRAMPUI-103 response.setContentType("text/html; charset=UTF8"); //$NON-NLS-1$ JsonFactory f = new JsonFactory(); JsonGenerator g = f.createJsonGenerator(response.getOutputStream(), JsonEncoding.UTF8); g.useDefaultPrettyPrinter(); g.writeStartObject(); for (java.util.Map.Entry<String, String> entry : responseMap.entrySet()) { String key = entry.getKey(); String val = entry.getValue(); g.writeStringField(key, val); } g.writeEndObject(); g.flush(); g.close(); } }