BuildInfoService.java

/*
 * Copyright 2017 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.kie.workbench.common.services.backend.builder.service;

import javax.enterprise.context.ApplicationScoped;
import javax.inject.Inject;

import org.guvnor.common.services.project.builder.service.BuildService;
import org.guvnor.common.services.project.model.Project;
import org.kie.workbench.common.services.backend.builder.core.Builder;
import org.kie.workbench.common.services.backend.builder.core.LRUBuilderCache;

/**
 * Service for providing access to the build information for a given project.
 * In general workbench modules and services should avoid direct access to the LRUBuilderCache, instead they should
 * use the BuildInfoService.
 */
@ApplicationScoped
public class BuildInfoService {

    private BuildService buildService;

    private LRUBuilderCache builderCache;

    public BuildInfoService( ) {
        //Empty constructor for Weld proxying
    }

    @Inject
    public BuildInfoService( BuildService buildService, LRUBuilderCache builderCache ) {
        this.buildService = buildService;
        this.builderCache = builderCache;
    }

    /**
     * Gets the BuildInfo for a given project. The BuildInfoService decides internally whenever the project should be
     * built prior to construct the BuildInfo.
     *
     * @param project The project for getting the BuildInfo.
     *
     * @return the BuildInfo for the given project.
     */
    public BuildInfo getBuildInfo( Project project ) {
        final Builder[] result = { builderCache.getBuilder( project ) };
        if ( result[ 0 ] == null || !result[ 0 ].isBuilt() ) {
            ( (BuildServiceImpl ) buildService ).build( project, builder -> result[ 0 ] = builder );
        }
        return new BuildInfoImpl( result[ 0 ] );
    }
}