com.google.gerrit.server.schema.Schema_108.java Source code

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Here is the source code for com.google.gerrit.server.schema.Schema_108.java

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// Copyright (C) 2015 The Android Open Source Project
//
// 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 com.google.gerrit.server.schema;

import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.HashMultimap;
import com.google.common.collect.Multimap;
import com.google.common.collect.SetMultimap;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.reviewdb.client.PatchSet;
import com.google.gerrit.reviewdb.client.Project;
import com.google.gerrit.reviewdb.client.RefNames;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.git.GroupCollector;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Provider;

import org.eclipse.jgit.lib.Constants;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.RefDatabase;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevObject;
import org.eclipse.jgit.revwalk.RevSort;
import org.eclipse.jgit.revwalk.RevWalk;

import java.io.IOException;
import java.util.Collection;
import java.util.Map;
import java.util.Set;

public class Schema_108 extends SchemaVersion {
    private final GitRepositoryManager repoManager;

    @Inject
    Schema_108(Provider<Schema_107> prior, GitRepositoryManager repoManager) {
        super(prior);
        this.repoManager = repoManager;
    }

    @Override
    protected void migrateData(ReviewDb db, UpdateUI ui) throws OrmException {
        ui.message("Listing all changes ...");
        SetMultimap<Project.NameKey, Change.Id> openByProject = getOpenChangesByProject(db);
        ui.message("done");

        ui.message("Updating groups for open changes ...");
        int i = 0;
        for (Map.Entry<Project.NameKey, Collection<Change.Id>> e : openByProject.asMap().entrySet()) {
            try (Repository repo = repoManager.openRepository(e.getKey()); RevWalk rw = new RevWalk(repo)) {
                updateProjectGroups(db, repo, rw, (Set<Change.Id>) e.getValue());
            } catch (IOException err) {
                throw new OrmException(err);
            }
            if (++i % 100 == 0) {
                ui.message("  done " + i + " projects ...");
            }
        }
        ui.message("done");
    }

    private static void updateProjectGroups(ReviewDb db, Repository repo, RevWalk rw, Set<Change.Id> changes)
            throws OrmException, IOException {
        // Match sorting in ReceiveCommits.
        rw.reset();
        rw.sort(RevSort.TOPO);
        rw.sort(RevSort.REVERSE, true);

        RefDatabase refdb = repo.getRefDatabase();
        for (Ref ref : refdb.getRefs(Constants.R_HEADS).values()) {
            RevCommit c = maybeParseCommit(rw, ref.getObjectId());
            if (c != null) {
                rw.markUninteresting(c);
            }
        }

        Multimap<ObjectId, Ref> changeRefsBySha = ArrayListMultimap.create();
        Multimap<ObjectId, PatchSet.Id> patchSetsBySha = ArrayListMultimap.create();
        for (Ref ref : refdb.getRefs(RefNames.REFS_CHANGES).values()) {
            ObjectId id = ref.getObjectId();
            if (ref.getObjectId() == null) {
                continue;
            }
            id = id.copy();
            changeRefsBySha.put(id, ref);
            PatchSet.Id psId = PatchSet.Id.fromRef(ref.getName());
            if (psId != null && changes.contains(psId.getParentKey())) {
                patchSetsBySha.put(id, psId);
                RevCommit c = maybeParseCommit(rw, id);
                if (c != null) {
                    rw.markStart(c);
                }
            }
        }

        GroupCollector collector = new GroupCollector(changeRefsBySha, db);
        RevCommit c;
        while ((c = rw.next()) != null) {
            collector.visit(c);
        }

        updateGroups(db, collector, patchSetsBySha);
    }

    private static void updateGroups(ReviewDb db, GroupCollector collector,
            Multimap<ObjectId, PatchSet.Id> patchSetsBySha) throws OrmException {
        Map<PatchSet.Id, PatchSet> patchSets = db.patchSets().toMap(db.patchSets().get(patchSetsBySha.values()));
        for (Map.Entry<ObjectId, Collection<String>> e : collector.getGroups().asMap().entrySet()) {
            for (PatchSet.Id psId : patchSetsBySha.get(e.getKey())) {
                PatchSet ps = patchSets.get(psId);
                if (ps != null) {
                    ps.setGroups(e.getValue());
                }
            }
        }

        db.patchSets().update(patchSets.values());
    }

    private SetMultimap<Project.NameKey, Change.Id> getOpenChangesByProject(ReviewDb db) throws OrmException {
        SetMultimap<Project.NameKey, Change.Id> openByProject = HashMultimap.create();
        for (Change c : db.changes().all()) {
            if (c.getStatus().isOpen()) {
                openByProject.put(c.getProject(), c.getId());
            }
        }
        return openByProject;
    }

    private static RevCommit maybeParseCommit(RevWalk rw, ObjectId id) throws IOException {
        if (id == null) {
            return null;
        }
        RevObject obj = rw.parseAny(id);
        return (obj instanceof RevCommit) ? (RevCommit) obj : null;
    }
}