Java tutorial
/* * Copyright (c) 2011, 2012, 2015 Eike Stepper (Berlin, Germany) 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: * Eike Stepper - initial API and implementation */ package org.eclipse.emf.cdo.server.internal.mongodb; import org.eclipse.emf.cdo.server.CDOServerBrowser; import org.eclipse.emf.cdo.server.CDOServerBrowser.AbstractPage; import org.eclipse.emf.cdo.server.mongodb.IMongoDBStore; import org.eclipse.emf.cdo.spi.server.InternalRepository; import org.eclipse.net4j.util.factory.ProductCreationException; import com.mongodb.BasicDBObject; import com.mongodb.DB; import com.mongodb.DBCollection; import com.mongodb.DBCursor; import com.mongodb.DBObject; import java.io.PrintStream; import java.util.Set; /** * @author Eike Stepper * @since 4.0 */ public class MongoDBBrowserPage extends AbstractPage { private static final boolean SHOW_INDEXES = true; private static final boolean SHOW_DOCUMENTS = true; private static final boolean SHOW_INITIAL_COMMIT = true; public MongoDBBrowserPage() { super("collections", "MongoDB Collections"); } public boolean canDisplay(InternalRepository repository) { return repository.getStore() instanceof IMongoDBStore; } public void display(CDOServerBrowser browser, InternalRepository repository, PrintStream out) { IMongoDBStore store = (IMongoDBStore) repository.getStore(); DB db = (DB) store.getDB(); out.print("<table border=\"0\">\r\n"); out.print("<tr>\r\n"); out.print("<td valign=\"top\">\r\n"); String collection = showCollections(browser, out, db, repository.getName()); out.print("</td>\r\n"); out.print("<td> </td>\r\n"); if (collection != null) { out.print("<td valign=\"top\">\r\n"); showCollection(browser, out, db, collection); out.print("</td>\r\n"); } out.print("</tr>\r\n"); out.print("</table>\r\n"); } protected String showCollections(CDOServerBrowser browser, PrintStream pout, DB db, String repo) { String collection = browser.getParam("collection"); Set<String> allCollectionNames = db.getCollectionNames(); for (String collectionName : allCollectionNames) { if (collection == null) { collection = collectionName; } String label = browser.escape(collectionName)/* .toLowerCase() */; if (collectionName.equals(collection)) { pout.print("<b>" + label + "</b><br>\r\n"); } else { pout.print(browser.href(label, getName(), "collection", collectionName) + "<br>\r\n"); } } return collection; } protected void showCollection(CDOServerBrowser browser, PrintStream pout, DB db, String collection) { DBCollection coll = db.getCollection(collection); pout.print("<table border=\"1\" cellpadding=\"4\">\r\n"); pout.print("<tr><td colspan=\"2\" align=\"center\"><h2>" + collection + "</h2></td></tr>\r\n"); if (SHOW_INDEXES) { showIndexes(browser, pout, coll); } if (SHOW_DOCUMENTS) { showDocuments(browser, pout, coll); } } protected void showIndexes(CDOServerBrowser browser, PrintStream pout, DBCollection coll) { pout.print("<tr><td colspan=\"2\" align=\"center\" bgcolor=\"EEEEEE\"><h4>Indexes</h4></td></tr>\r\n"); int i = 0; for (DBObject index : coll.getIndexInfo()) { ++i; String bg = (i & 1) == 1 ? "bgcolor=\"DDDDDD\"" : "bgcolor=\"EEEEEE\""; pout.print("<tr><td valign=\"top\" " + bg + "><b>" + i + " </b></td><td valign=\"top\">"); showObject(browser, pout, index, ""); pout.print("</td></tr>\r\n"); } } protected void showDocuments(CDOServerBrowser browser, PrintStream pout, DBCollection coll) { DBCursor cursor = null; try { pout.print( "<tr><td colspan=\"2\" align=\"center\" bgcolor=\"EEEEEE\"><h4>Documents</h4></td></tr>\r\n"); int i = 0; cursor = coll.find(); try { cursor = cursor.sort(new BasicDBObject("_id", 1)); } catch (Exception ex) { // Ignore } while (cursor.hasNext()) { DBObject doc = cursor.next(); ++i; if (i == 1 && showFirstCommit(coll)) { continue; } String bg = (i & 1) == 1 ? "bgcolor=\"DDDDDD\"" : "bgcolor=\"EEEEEE\""; pout.print("<tr><td valign=\"top\" " + bg + "><b>" + i + " </b></td><td valign=\"top\">"); showObject(browser, pout, doc, ""); pout.print("</td></tr>\r\n"); } pout.print("</table>\r\n"); } finally { if (cursor != null) { cursor.close(); } } } protected void showObject(CDOServerBrowser browser, PrintStream pout, DBObject doc, String level) { Set<String> keySet = doc.keySet(); boolean highlight = false; try { String paramKey = browser.getParam("key"); if (paramKey != null) { String paramValue = browser.getParam("value"); Object value = doc.get(paramKey); if (String.valueOf(value).equals(paramValue)) { highlight = true; } } } catch (Exception ex) { // Ignore } if (highlight) { pout.print("<table border=\"0\" bgcolor=\"#FFFFA8\"><tr><td>"); } for (String key : keySet) { pout.print(level); pout.print("<b>"); pout.print(key); pout.print("</b> = "); Object value = doc.get(key); if (value instanceof DBObject) { DBObject child = (DBObject) value; pout.print("<br>"); showObject(browser, pout, child, level + " "); } else { pout.print("<font color=\"#0000FF\">"); if (value instanceof String) { pout.print("\""); pout.print(browser.escape((String) value)); pout.print("\""); } else { String string = String.valueOf(value); pout.print(browser.href(string, "collections", "key", key, "value", string)); } pout.print("</font><br>"); } } if (highlight) { pout.print("</td></tr></table>"); } } protected boolean showFirstCommit(DBCollection coll) { return coll.getName().equals(Commits.COMMITS) && !SHOW_INITIAL_COMMIT; } /** * @author Eike Stepper */ public static class Factory extends org.eclipse.net4j.util.factory.Factory { public static final String TYPE = "mongodb"; public Factory() { super(PRODUCT_GROUP, TYPE); } public MongoDBBrowserPage create(String description) throws ProductCreationException { return new MongoDBBrowserPage(); } } }