org.bndtools.templating.jgit.PlainGitWorkspaceTemplateLoader Maven / Gradle / Ivy

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package org.bndtools.templating.jgit;

import java.net.URL;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.stream.Collectors;

import org.bndtools.templating.Template;
import org.bndtools.templating.TemplateLoader;
import org.osgi.framework.BundleContext;
import org.osgi.framework.Constants;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Deactivate;
import org.osgi.service.component.annotations.Reference;
import org.osgi.service.component.annotations.ReferenceCardinality;
import org.osgi.service.component.annotations.ReferencePolicyOption;
import org.osgi.util.promise.Promise;
import org.osgi.util.promise.PromiseFactory;

import aQute.bnd.header.Attrs;
import aQute.bnd.header.Parameters;
import aQute.service.reporter.Reporter;

@Component(name = "org.bndtools.core.templating.workspace.git", property = {
	Constants.SERVICE_DESCRIPTION + "=Load workspace templates from Git clone URLs"
})
public class PlainGitWorkspaceTemplateLoader implements TemplateLoader {

	private static final String	TEMPLATE_TYPE	= "workspace";

	private URL					iconUrl;

	private PromiseFactory		promiseFactory;
	private ExecutorService		localExecutor	= null;

	@Reference(cardinality = ReferenceCardinality.OPTIONAL, policyOption = ReferencePolicyOption.GREEDY)
	void setExecutorService(ExecutorService executor) {
		this.promiseFactory = new PromiseFactory(Objects.requireNonNull(executor));
	}

	@Activate
	void activate(BundleContext context) {
		iconUrl = context.getBundle()
			.getEntry("icons/git-16px.png");
		if (promiseFactory == null) {
			localExecutor = Executors.newCachedThreadPool();
			promiseFactory = new PromiseFactory(localExecutor);
		}
	}

	@Deactivate
	void dectivate() {
		if (localExecutor != null) {
			localExecutor.shutdown();
		}
	}

	@Override
	public Promise> findTemplates(String type, Reporter reporter) {
		if (!TEMPLATE_TYPE.equals(type)) {
			return promiseFactory.resolved(Collections.emptyList());
		}

		Parameters gitRepos = new GitRepoPreferences().getGitRepos();
		List