com.googlesource.gerrit.plugins.wip.BaseAction.java Source code

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Here is the source code for com.googlesource.gerrit.plugins.wip.BaseAction.java

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// Copyright (C) 2013 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.googlesource.gerrit.plugins.wip;

import java.util.Collections;

import com.google.common.base.Strings;
import com.google.gerrit.extensions.restapi.ResourceConflictException;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.reviewdb.client.ChangeMessage;
import com.google.gerrit.reviewdb.client.Change.Id;
import com.google.gerrit.reviewdb.client.Change.Status;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.ApprovalsUtil;
import com.google.gerrit.server.ChangeUtil;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gwtorm.server.AtomicUpdate;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Provider;

abstract class BaseAction {
    static class Input {
        String message;
    }

    private final Provider<ReviewDb> dbProvider;
    private final Provider<CurrentUser> userProvider;

    @Inject
    BaseAction(Provider<ReviewDb> dbProvider, Provider<CurrentUser> userProvider) {
        this.dbProvider = dbProvider;
        this.userProvider = userProvider;
    }

    protected void changeStatus(Change change, Input input, final Status from, final Status to)
            throws OrmException, ResourceConflictException {
        ReviewDb db = dbProvider.get();
        Id changeId = change.getId();
        db.changes().beginTransaction(changeId);
        try {
            change = db.changes().atomicUpdate(changeId, new AtomicUpdate<Change>() {
                @Override
                public Change update(Change change) {
                    if (change.getStatus() == from) {
                        change.setStatus(to);
                        ChangeUtil.updated(change);
                        return change;
                    }
                    return null;
                }
            });

            if (change == null) {
                throw new ResourceConflictException("change is " + status(db.changes().get(changeId)));
            }

            db.changeMessages().insert(Collections.singleton(newMessage(input, change)));
            new ApprovalsUtil(db).syncChangeStatus(change);
            db.commit();
        } finally {
            db.rollback();
        }
    }

    private ChangeMessage newMessage(Input input, Change change) throws OrmException {
        StringBuilder msg = new StringBuilder("Change " + change.getId().get() + ": "
                + ((change.getStatus() == Status.WORKINPROGRESS) ? "Work In Progress" : "Ready For Review"));
        if (!Strings.nullToEmpty(input.message).trim().isEmpty()) {
            msg.append("\n\n");
            msg.append(input.message.trim());
        }

        ChangeMessage message = new ChangeMessage(
                new ChangeMessage.Key(change.getId(), ChangeUtil.messageUUID(dbProvider.get())),
                ((IdentifiedUser) userProvider.get()).getAccountId(), change.getLastUpdatedOn(),
                change.currentPatchSetId());
        message.setMessage(msg.toString());
        return message;
    }

    protected static String status(Change change) {
        return change != null ? change.getStatus().name().toLowerCase() : "deleted";
    }
}