org.eclipse.orion.server.git.jobs.StatusJob.java Source code

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Here is the source code for org.eclipse.orion.server.git.jobs.StatusJob.java

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/*******************************************************************************
 * Copyright (c) 2015 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.net.URI;
import java.util.Map.Entry;
import java.util.Set;

import javax.servlet.http.HttpServletResponse;

import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Status;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.storage.file.FileRepositoryBuilder;
import org.eclipse.orion.server.core.ServerStatus;
import org.eclipse.orion.server.git.GitActivator;
import org.eclipse.orion.server.git.servlets.GitUtils;
import org.eclipse.orion.server.git.servlets.GitUtils.Traverse;
import org.eclipse.osgi.util.NLS;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * A job to perform a git status in the background.
 */
public class StatusJob extends GitJob {

    private static final int GIT_PERF_THRESHOLD = 10000;// 10 seconds
    private IPath filePath;
    private URI baseLocation;

    /**
     * Creates job with given the file path within a git repository.
     * 
     * @param userRunningTask
     * @param filePath
     * @param baseLocation
     */
    public StatusJob(String userRunningTask, Path filePath, URI baseLocation) {
        super(userRunningTask, false);
        this.filePath = filePath;
        this.baseLocation = baseLocation;
    }

    @Override
    protected IStatus performJob() {
        Logger logger = LoggerFactory.getLogger("org.eclipse.orion.server.git");
        Repository db = null;
        try {
            long t0 = System.currentTimeMillis();
            Set<Entry<IPath, File>> set = GitUtils.getGitDirs(this.filePath, Traverse.GO_UP).entrySet();
            File gitDir = set.iterator().next().getValue();
            if (gitDir == null) {
                logger.error("***** Git status failed to find Git directory for request: " + this.filePath);
                String msg = NLS.bind("Could not find repository for {0}", filePath);
                return new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_BAD_REQUEST, msg, null);
            }
            long t1 = System.currentTimeMillis();
            db = FileRepositoryBuilder.create(gitDir);
            Git git = new Git(db);
            org.eclipse.jgit.api.Status gitStatus = git.status().call();
            long t2 = System.currentTimeMillis();

            String relativePath = GitUtils.getRelativePath(this.filePath, set.iterator().next().getKey());
            IPath basePath = new Path(relativePath);
            org.eclipse.orion.server.git.objects.Status status = new org.eclipse.orion.server.git.objects.Status(
                    this.baseLocation, db, gitStatus, basePath);
            ServerStatus result = new ServerStatus(Status.OK_STATUS, HttpServletResponse.SC_OK, status.toJSON());
            if (logger.isDebugEnabled() && (t2 - t0) > GIT_PERF_THRESHOLD) {
                logger.debug("Slow git status. Finding git dir: " + (t1 - t0) + "ms. JGit status call: " + (t2 - t1)
                        + "ms");
            }
            return result;
        } catch (Exception e) {
            String msg = NLS.bind("An error occured when generating status for ref {0}", this.filePath);
            return new Status(IStatus.ERROR, GitActivator.PI_GIT, msg, e);
        } finally {
            if (db != null) {
                // close the git repository
                db.close();
            }
        }
    }
}