InMemorySourceRegistry.java

/*
 * Copyright 2016 Red Hat, Inc. and/or its affiliates.
 *
 * 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 org.guvnor.ala.registry.local;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import javax.enterprise.context.ApplicationScoped;

import org.uberfire.java.nio.file.Path;
import org.guvnor.ala.build.Project;
import org.guvnor.ala.registry.SourceRegistry;
import org.guvnor.ala.source.Repository;
import org.guvnor.ala.source.Source;

/**
 * @TODO: This is an implementation for local testing. A more robust and
 * distributed implementation should be provided for real use cases. All the
 * lookups mechanisms and structures needs to be improved for performance.
 */
@ApplicationScoped
public class InMemorySourceRegistry implements SourceRegistry {

    private final Map<Path, Repository> repositorySourcesPath;
    //Store the repository id and path for reverse lookup
    private final Map<String, Path> pathByRepositoryId;
    private final Map<Repository, List<Project>> projectsByRepo;
    private final Map<Repository, List<Source>> sourceByRepo;
    private final Map<Source, Project> projectBySource;

    public InMemorySourceRegistry() {
        repositorySourcesPath = new ConcurrentHashMap<>();
        pathByRepositoryId = new ConcurrentHashMap<>();
        projectsByRepo = new ConcurrentHashMap<>();
        sourceByRepo = new ConcurrentHashMap<>();
        projectBySource = new ConcurrentHashMap<>();
    }

    @Override
    public void registerRepositorySources(final Path path,
            final Repository repo) {
        repositorySourcesPath.put(path, repo);
        pathByRepositoryId.put(repo.getId(), path);
    }

    @Override
    public Path getRepositoryPath(Repository repo) {
        return pathByRepositoryId.get(repo.getId());
    }

    @Override
    public Path getRepositoryPathById(String repoId) {
        return pathByRepositoryId.get(repoId);
    }

    @Override
    public Repository getRepositoryByPath(Path path) {
        return repositorySourcesPath.get(path);
    }

    @Override
    public List<Repository> getAllRepositories() {
        return new ArrayList<>(repositorySourcesPath.values());
    }

    @Override
    public void registerProject(Repository repo,
            Project project) {
        projectsByRepo.putIfAbsent(repo, new ArrayList<>());
        projectsByRepo.get(repo).add(project);

    }

    @Override
    public List<Project> getAllProjects(Repository repository) {
        Path repoPath = pathByRepositoryId.get(repository.getId());
        List<Project> allProjects = new ArrayList<>();
        for (Source s : projectBySource.keySet()) {
            if (projectBySource.get(s).getRootPath().equals(repoPath)) {
                allProjects.add(projectBySource.get(s));
            }
        }
        return allProjects;
    }

    @Override
    public Project getProjectByName(String projectName) {
        for (Source s : projectBySource.keySet()) {
            if (projectBySource.get(s).getName().equals(projectName)) {
                return projectBySource.get(s);
            }
        }
        return null;
    }

    @Override
    public Repository getRepositoryById(String repositoryId) {
        return repositorySourcesPath.get(pathByRepositoryId.get(repositoryId));
    }

    @Override
    public void registerSource(final Repository repo,
            final Source source) {
        sourceByRepo.putIfAbsent(repo, new ArrayList<>());
        sourceByRepo.get(repo).add(source);
    }

    @Override
    public void registerProject(final Source source,
            final Project project) {
        projectBySource.put(source, project);
    }

}