Java tutorial
/******************************************************************************* * Copyright (c) 2012 IBM Corporation 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: * IBM Corporation - initial API and implementation *******************************************************************************/ package org.eclipse.orion.server.git.jobs; import java.io.File; import java.io.IOException; import java.net.URI; import java.util.Set; import javax.servlet.http.HttpServletResponse; import org.eclipse.core.runtime.*; import org.eclipse.jgit.api.Git; import org.eclipse.jgit.api.LogCommand; import org.eclipse.jgit.errors.IncorrectObjectTypeException; import org.eclipse.jgit.errors.MissingObjectException; import org.eclipse.jgit.lib.*; import org.eclipse.jgit.revwalk.RevCommit; import org.eclipse.jgit.revwalk.RevWalk; import org.eclipse.jgit.storage.file.FileRepository; import org.eclipse.orion.internal.server.servlets.ProtocolConstants; import org.eclipse.orion.server.core.ServerStatus; import org.eclipse.orion.server.git.GitActivator; import org.eclipse.orion.server.git.GitConstants; import org.eclipse.orion.server.git.objects.Log; import org.eclipse.orion.server.git.objects.Remote; import org.eclipse.orion.server.git.servlets.GitUtils; import org.eclipse.osgi.util.NLS; import org.json.JSONArray; import org.json.JSONObject; public class RemoteDetailsJob extends GitJob { private IPath path; private URI cloneLocation; private int commitsSize; private int pageNo; private int pageSize; private String baseLocation; private String configName; /** * Creates job with given page range and adding <code>commitsSize</code> commits to every branch. * @param userRunningTask * @param repositoryPath * @param cloneLocation * @param commitsSize user 0 to omit adding any log, only CommitLocation will be attached * @param pageNo * @param pageSize use negative to indicate that all commits need to be returned * @param baseLocation URI used as a base for generating next and previous page links. Should not contain any parameters. */ public RemoteDetailsJob(String userRunningTask, String configName, IPath repositoryPath, URI cloneLocation, int commitsSize, int pageNo, int pageSize, String baseLocation) { super(userRunningTask, false); this.path = repositoryPath; this.cloneLocation = cloneLocation; this.commitsSize = commitsSize; this.pageNo = pageNo; this.pageSize = pageSize; this.baseLocation = baseLocation; this.configName = configName; } /** * Creates job returning list of all branches. * @param userRunningTask * @param repositoryPath * @param cloneLocation */ public RemoteDetailsJob(String userRunningTask, String configName, IPath repositoryPath, URI cloneLocation) { this(userRunningTask, configName, repositoryPath, cloneLocation, 0, 0, -1, null); } /** * Creates job returning list of all branches adding <code>commitsSize</code> commits to every branch. * @param userRunningTask * @param repositoryPath * @param cloneLocation * @param commitsSize */ public RemoteDetailsJob(String userRunningTask, String configName, IPath repositoryPath, URI cloneLocation, int commitsSize) { this(userRunningTask, configName, repositoryPath, cloneLocation, commitsSize, 0, -1, null); } private ObjectId getCommitObjectId(Repository db, ObjectId oid) throws MissingObjectException, IncorrectObjectTypeException, IOException { RevWalk walk = new RevWalk(db); try { return walk.parseCommit(oid); } finally { walk.release(); } } @Override protected IStatus performJob() { try { File gitDir = GitUtils.getGitDir(path); Repository db = new FileRepository(gitDir); Git git = new Git(db); Set<String> configNames = db.getConfig().getSubsections(ConfigConstants.CONFIG_REMOTE_SECTION); for (String configN : configNames) { if (configN.equals(configName)) { Remote remote = new Remote(cloneLocation, db, configN); JSONObject result = remote.toJSON(); if (!result.has(ProtocolConstants.KEY_CHILDREN)) { return new ServerStatus(Status.OK_STATUS, HttpServletResponse.SC_OK, result); } JSONArray children = result.getJSONArray(ProtocolConstants.KEY_CHILDREN); if (children.length() == 0 || (commitsSize == 0 && pageSize < 0)) { return new ServerStatus(Status.OK_STATUS, HttpServletResponse.SC_OK, result); } int firstChild = pageSize > 0 ? pageSize * (pageNo - 1) : 0; int lastChild = pageSize > 0 ? firstChild + pageSize - 1 : children.length() - 1; lastChild = lastChild > children.length() - 1 ? children.length() - 1 : lastChild; if (pageNo > 1 && baseLocation != null) { String prev = baseLocation + "?page=" + (pageNo - 1) + "&pageSize=" + pageSize; if (commitsSize > 0) { prev += "&" + GitConstants.KEY_TAG_COMMITS + "=" + commitsSize; } result.put(ProtocolConstants.KEY_PREVIOUS_LOCATION, prev); } if (lastChild < children.length() - 1) { String next = baseLocation + "?page=" + (pageNo + 1) + "&pageSize=" + pageSize; if (commitsSize > 0) { next += "&" + GitConstants.KEY_TAG_COMMITS + "=" + commitsSize; } result.put(ProtocolConstants.KEY_NEXT_LOCATION, next); } JSONArray newChildren = new JSONArray(); for (int i = firstChild; i <= lastChild; i++) { JSONObject branch = children.getJSONObject(i); if (commitsSize == 0) { newChildren.put(branch); } else { LogCommand lc = git.log(); String branchName = branch.getString(ProtocolConstants.KEY_ID); ObjectId toObjectId = db.resolve(branchName); Ref toRefId = db.getRef(branchName); if (toObjectId == null) { String msg = NLS.bind("No ref or commit found: {0}", branchName); return new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_NOT_FOUND, msg, null); } toObjectId = getCommitObjectId(db, toObjectId); // set the commit range lc.add(toObjectId); lc.setMaxCount(this.commitsSize); Iterable<RevCommit> commits = lc.call(); Log log = new Log(cloneLocation, db, commits, null, null, toRefId); log.setPaging(1, commitsSize); branch.put(GitConstants.KEY_TAG_COMMIT, log.toJSON()); newChildren.put(branch); } } result.put(ProtocolConstants.KEY_CHILDREN, newChildren); return new ServerStatus(Status.OK_STATUS, HttpServletResponse.SC_OK, result); } } String msg = NLS.bind("Couldn't find remote : {0}", configName); return new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_NOT_FOUND, msg, null); } catch (Exception e) { String msg = NLS.bind("Couldn't get remote details : {0}", configName); return new Status(IStatus.ERROR, GitActivator.PI_GIT, msg, e); } } }