CommonSdkUtil.java

/*
 * Copyright 2014-2016 CyberVision, Inc.
 *
 * 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.kaaproject.kaa.server.control.service.sdk;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.compress.archivers.tar.TarArchiveEntry;
import org.kaaproject.kaa.server.common.zk.ServerNameUtil;
import org.kaaproject.kaa.server.common.zk.gen.BootstrapNodeInfo;
import org.kaaproject.kaa.server.common.zk.gen.TransportMetaData;
import org.kaaproject.kaa.server.common.zk.gen.VersionConnectionInfoPair;
import org.kaaproject.kaa.server.control.service.sdk.compress.TarEntryData;

import java.util.List;

public class CommonSdkUtil {

  private static final String SEPARATOR = ":";

  private CommonSdkUtil() {
  }

  /**
   * Create new zip entry data for the input source.
   *
   * @param source  the input source
   * @param name the entry name
   * @return the new zip entry data
   */
  public static TarEntryData tarEntryForSources(String source, String name) {
    TarArchiveEntry tarEntry = new TarArchiveEntry(name);
    tarEntry.setSize(source.getBytes().length);
    return new TarEntryData(tarEntry, source.getBytes());
  }

  /**
   * Convert list of {@link BootstrapNodeInfo} to the string format.
   *
   * @param bootstrapNodes the list of Bootstrap nodes info
   * @return Bootstrap nodes information in the string format
   */
  public static String bootstrapNodesToString(List<BootstrapNodeInfo> bootstrapNodes) {
    String bootstrapServers = "";
    if (bootstrapNodes != null && !bootstrapNodes.isEmpty()) {
      for (BootstrapNodeInfo node : bootstrapNodes) {
        List<TransportMetaData> supportedChannels = node.getTransports();

        int accessPointId = ServerNameUtil.crc32(node.getConnectionInfo());

        for (TransportMetaData transport : supportedChannels) {
          for (VersionConnectionInfoPair pair : transport.getConnectionInfo()) {
            bootstrapServers += accessPointId;
            bootstrapServers += SEPARATOR;
            bootstrapServers += transport.getId();
            bootstrapServers += SEPARATOR;
            bootstrapServers += pair.getVersion();
            bootstrapServers += SEPARATOR;
            bootstrapServers += Base64.encodeBase64String(pair.getConenctionInfo().array());
            bootstrapServers += ";";
          }
        }
      }
    }
    return bootstrapServers;
  }
}