content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.apache.ambari.server.bootstrap;
  
  import static org.apache.ambari.server.utils.VersionUtils.DEV_VERSION;
  
  import java.io.File;
  import java.io.IOException;
  import java.net.InetAddress;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.ambari.server.api.services.AmbariMetaInfo;
  import org.apache.ambari.server.bootstrap.BSResponse.BSRunStat;
  import org.apache.ambari.server.configuration.Configuration;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import com.google.inject.Inject;
  import com.google.inject.Singleton;
  
  @Singleton
  public class BootStrapImpl {
    private File bootStrapDir;
    private String bootScript;
    private String bootSetupAgentScript;
    private String bootSetupAgentPassword;
    private BSRunner bsRunner;
    private String masterHostname;
    long timeout;
  
    private static final Logger LOG = LoggerFactory.getLogger(BootStrapImpl.class);
  
    /* Monotonically increasing requestid for the bootstrap api to query on */
    int requestId = 0;
    private FifoLinkedHashMap<Long, BootStrapStatus> bsStatus;
    private final String clusterOsType;
    private final String clusterOsFamily;
    private String projectVersion;
    private int serverPort;
  
    @Inject
    public BootStrapImpl(Configuration conf, AmbariMetaInfo ambariMetaInfo) throws IOException {
      bootStrapDir = conf.getBootStrapDir();
      bootScript = conf.getBootStrapScript();
      bootSetupAgentScript = conf.getBootSetupAgentScript();
      bootSetupAgentPassword = conf.getBootSetupAgentPassword();
      bsStatus = new FifoLinkedHashMap<>();
      masterHostname = conf.getMasterHostname(
          InetAddress.getLocalHost().getCanonicalHostName());
      clusterOsType = conf.getServerOsType();
      clusterOsFamily = conf.getServerOsFamily();
      projectVersion = ambariMetaInfo.getServerVersion();
      projectVersion = (projectVersion.equals(DEV_VERSION)) ? DEV_VERSION.replace("$", "") : projectVersion;
      serverPort = (conf.getApiSSLAuthentication())? conf.getClientSSLApiPort() : conf.getClientApiPort();
    }
  
    /**
     * Return {@link BootStrapStatus} for a given responseId.
     * @param requestId the responseId for which the status needs to be returned.
     * @return status for a specific response id. A response Id of -1 means the
     * latest responseId.
     */
    public synchronized BootStrapStatus getStatus(long requestId) {
      if (! bsStatus.containsKey(Long.valueOf(requestId))) {
        return null;
      }
      return bsStatus.get(Long.valueOf(requestId));
    }
  
    /**
     * update status of a request. Mostly called by the status collector thread.
     * @param requestId the request id.
     * @param status the status of the update.
     */
    synchronized void updateStatus(long requestId, BootStrapStatus status) {
      bsStatus.put(Long.valueOf(requestId), status);
    }
  
  
    public synchronized void init() throws IOException {
      if (!bootStrapDir.exists()) {
        boolean mkdirs = bootStrapDir.mkdirs();
        if (!mkdirs) {
          throw new IOException("Unable to make directory for " +
              "bootstrap " + bootStrapDir);
        }
      }
    }
  
    public  synchronized BSResponse runBootStrap(SshHostInfo info) {
      BSResponse response = new BSResponse();
      /* Run some checks for ssh host */
      LOG.info("BootStrapping hosts " + info.hostListAsString());
      if (bsRunner != null) {
        response.setLog("BootStrap in Progress: Cannot Run more than one.");
        response.setStatus(BSRunStat.ERROR);
  
        return response;
      }
      requestId++;
  
      if (info.getHosts() == null || info.getHosts().isEmpty()) {
        BootStrapStatus status = new BootStrapStatus();
        status.setLog("Host list is empty.");
        status.setHostsStatus(new ArrayList<>());
        status.setStatus(BootStrapStatus.BSStat.ERROR);
        updateStatus(requestId, status);
  
        response.setStatus(BSRunStat.OK);
        response.setLog("Host list is empty.");
        response.setRequestId(requestId);
        return response;
      } else {
        bsRunner = new BSRunner(this, info, bootStrapDir.toString(),
            bootScript, bootSetupAgentScript, bootSetupAgentPassword, requestId, 0L,
            masterHostname, info.isVerbose(), clusterOsFamily, projectVersion, serverPort);
        bsRunner.start();
        response.setStatus(BSRunStat.OK);
        response.setLog("Running Bootstrap now.");
        response.setRequestId(requestId);
        return response;
      }
    }
  
    /**
     * @param hosts
     * @return
     */
    public synchronized List<BSHostStatus> getHostInfo(List<String> hosts) {
      List<BSHostStatus> statuses = new ArrayList<>();
  
      if (null == hosts || 0 == hosts.size() || (hosts.size() == 1 && hosts.get(0).equals("*"))) {
        for (BootStrapStatus status : bsStatus.values()) {
          if (null != status.getHostsStatus()) {
            statuses.addAll(status.getHostsStatus());
          }
        }
      } else {
        // TODO make bootstrapping a bit more robust then stop looping
        for (BootStrapStatus status : bsStatus.values()) {
          for (BSHostStatus hostStatus : status.getHostsStatus()) {
            if (-1 != hosts.indexOf(hostStatus.getHostName())) {
              statuses.add(hostStatus);
            }
          }
        }
      }
  
      return statuses;
    }
  
    /**
     *
     */
    public synchronized void reset() {
      bsRunner = null;
    }
  
  }
  