001/*
002 * SonarQube
003 * Copyright (C) 2009-2016 SonarSource SA
004 * mailto:contact AT sonarsource DOT com
005 *
006 * This program is free software; you can redistribute it and/or
007 * modify it under the terms of the GNU Lesser General Public
008 * License as published by the Free Software Foundation; either
009 * version 3 of the License, or (at your option) any later version.
010 *
011 * This program is distributed in the hope that it will be useful,
012 * but WITHOUT ANY WARRANTY; without even the implied warranty of
013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014 * Lesser General Public License for more details.
015 *
016 * You should have received a copy of the GNU Lesser General Public License
017 * along with this program; if not, write to the Free Software Foundation,
018 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
019 */
020package org.sonarqube.ws.client;
021
022import com.google.common.base.Joiner;
023import com.google.protobuf.Message;
024import com.google.protobuf.Parser;
025import java.io.InputStream;
026import java.util.List;
027import javax.annotation.CheckForNull;
028import javax.annotation.Nullable;
029import org.apache.commons.io.IOUtils;
030import org.sonarqube.ws.MediaTypes;
031
032import static com.google.common.base.Preconditions.checkArgument;
033import static com.google.common.base.Strings.isNullOrEmpty;
034
035public abstract class BaseService {
036
037  private static final Joiner MULTI_VALUES_JOINER = Joiner.on(",");
038
039  private final WsConnector wsConnector;
040  protected final String controller;
041
042  public BaseService(WsConnector wsConnector, String controllerPath) {
043    checkArgument(!isNullOrEmpty(controllerPath));
044    this.wsConnector = wsConnector;
045    this.controller = controllerPath;
046  }
047
048  protected <T extends Message> T call(BaseRequest request, Parser<T> parser) {
049    request.setMediaType(MediaTypes.PROTOBUF);
050    WsResponse response = call(request);
051    return convert(response, parser);
052  }
053
054  protected WsResponse call(WsRequest request) {
055    return wsConnector.call(request).failIfNotSuccessful();
056  }
057
058  public <T extends Message> T convert(WsResponse response, Parser<T> parser) {
059    try (InputStream byteStream = response.contentStream()) {
060      byte[] bytes = IOUtils.toByteArray(byteStream);
061      // HTTP header "Content-Type" is not verified. It may be different than protobuf.
062      return parser.parseFrom(bytes);
063    } catch (Exception e) {
064      throw new IllegalStateException("Fail to parse protobuf response of " + response.requestUrl(), e);
065    }
066  }
067
068  protected String path(String action) {
069    return String.format("%s/%s", controller, action);
070  }
071
072  @CheckForNull
073  protected static String inlineMultipleParamValue(@Nullable List<String> values) {
074    return values == null ? null : MULTI_VALUES_JOINER.join(values);
075  }
076}