nl.knaw.huygens.alexandria.endpoint.about.AboutEndpoint.java Source code

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Here is the source code for nl.knaw.huygens.alexandria.endpoint.about.AboutEndpoint.java

Source

package nl.knaw.huygens.alexandria.endpoint.about;

/*
 * #%L
 * alexandria-main
 * =======
 * Copyright (C) 2015 Huygens ING (KNAW)
 * =======
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import java.io.IOException;
import java.net.URI;
import java.time.Instant;
import java.time.temporal.TemporalAmount;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.PropertyResourceBundle;

import javax.inject.Inject;
import javax.inject.Singleton;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.core.Response;

import com.google.common.collect.Maps;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import nl.knaw.huygens.Log;
import nl.knaw.huygens.alexandria.config.AlexandriaConfiguration;
import nl.knaw.huygens.alexandria.endpoint.JSONEndpoint;
import nl.knaw.huygens.alexandria.service.AlexandriaService;

@Singleton
@Path("about")
@Api("about")
public class AboutEndpoint extends JSONEndpoint {
    private static final Instant startedAt = Instant.now();

    private static PropertyResourceBundle propertyResourceBundle;

    private final TemporalAmount tentativesTTL;
    private final URI baseURI;
    private final AlexandriaService service;

    @Inject
    public AboutEndpoint(AlexandriaConfiguration config, AlexandriaService service) {
        this.service = service;
        this.baseURI = config.getBaseURI();
        this.tentativesTTL = service.getTentativesTimeToLive();
    }

    private static synchronized String getProperty(String key) {
        if (propertyResourceBundle == null) {
            try {
                propertyResourceBundle = new PropertyResourceBundle(//
                        Thread.currentThread().getContextClassLoader().getResourceAsStream("about.properties"));
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        try {
            return propertyResourceBundle.getString(key);
        } catch (MissingResourceException e) {
            Log.warn("Missing expected resource: [{}] -- winging it", key);
            return "missing";
        } catch (ClassCastException e) {
            Log.warn("Property value for key [{}] cannot be transformed to String -- winging it", key);
            return "malformed";
        }
    }

    /**
     * Show information about the back-end
     *
     * @return about-data map
     */
    @GET
    @ApiOperation("get information about the server (version,buildDate,commitId,startedAt)")
    public Response getMetadata() {
        final Map<String, String> data = Maps.newLinkedHashMap();
        data.put("baseURI", baseURI.toString());
        data.put("buildDate", getProperty("buildDate"));
        data.put("commitId", getProperty("commitId"));
        data.put("scmBranch", getProperty("scmBranch"));
        data.put("startedAt", startedAt.toString());
        data.put("tentativesTTL", tentativesTTL.toString());
        data.put("version", getProperty("version"));
        return Response.ok(data).build();
    }

    /**
     * Show information about the back-end
     *
     * @return about-data map
     */
    @GET
    @Path("service")
    @ApiOperation("get information about the service")
    public Response getGraphMetadata() {
        return Response.ok(service.getMetadata()).build();
    }

}