Java Configuration.getTrimmedStringCollection方法代碼示例

import org.apache.hadoop.conf.Configuration; //導入方法依賴的package包/類
/**
 * Verify configuration that there are at least two RM-ids
 * and RPC addresses are specified for each RM-id.
 * Then set the RM-ids.
 */
private static void verifyAndSetRMHAIdsList(Configuration conf) {
  Collection<String> ids =
    conf.getTrimmedStringCollection(YarnConfiguration.RM_HA_IDS);
  if (ids.size() < 2) {
    throwBadConfigurationException(
      getInvalidValueMessage(YarnConfiguration.RM_HA_IDS,
        conf.get(YarnConfiguration.RM_HA_IDS) +
        "\nHA mode requires atleast two RMs"));
  }

  StringBuilder setValue = new StringBuilder();
  for (String id: ids) {
    // verify the RM service addresses configurations for every RMIds
    for (String prefix : YarnConfiguration.getServiceAddressConfKeys(conf)) {
      checkAndSetRMRPCAddress(prefix, id, conf);
    }
    setValue.append(id);
    setValue.append(",");
  }
  conf.set(YarnConfiguration.RM_HA_IDS,
    setValue.substring(0, setValue.length() - 1));
}
 

import org.apache.hadoop.conf.Configuration; //導入方法依賴的package包/類
private static void verifyAndSetCurrentRMHAId(Configuration conf) {
  String rmId = getRMHAId(conf);
  if (rmId == null) {
    StringBuilder msg = new StringBuilder();
    msg.append("Can not find valid RM_HA_ID. None of ");
    for (String id : conf
        .getTrimmedStringCollection(YarnConfiguration.RM_HA_IDS)) {
      msg.append(addSuffix(YarnConfiguration.RM_ADDRESS, id) + " ");
    }
    msg.append(" are matching" +
        " the local address OR " + YarnConfiguration.RM_HA_ID + " is not" +
        " specified in HA Configuration");
    throwBadConfigurationException(msg.toString());
  } else {
    Collection<String> ids = getRMHAIds(conf);
    if (!ids.contains(rmId)) {
      throwBadConfigurationException(
        getRMHAIdNeedToBeIncludedMessage(ids.toString(), rmId));
    }
  }
  conf.set(YarnConfiguration.RM_HA_ID, rmId);
}
 

import org.apache.hadoop.conf.Configuration; //導入方法依賴的package包/類
/**
 * Returns list of InetSocketAddresses corresponding to the namenode
 * that manages this cluster. Note this is to be used by datanodes to get
 * the list of namenode addresses to talk to.
 *
 * Returns namenode address specifically configured for datanodes (using
 * service ports), if found. If not, regular RPC address configured for other
 * clients is returned.
 *
 * @param conf configuration
 * @return list of InetSocketAddress
 * @throws IOException on error
 */
public static Map<String, Map<String, InetSocketAddress>>
  getNNServiceRpcAddressesForCluster(Configuration conf) throws IOException {
  // Use default address as fall back
  String defaultAddress;
  try {
    defaultAddress = NetUtils.getHostPortString(NameNode.getAddress(conf));
  } catch (IllegalArgumentException e) {
    defaultAddress = null;
  }

  Collection<String> parentNameServices = conf.getTrimmedStringCollection
          (DFSConfigKeys.DFS_INTERNAL_NAMESERVICES_KEY);

  if (parentNameServices.isEmpty()) {
    parentNameServices = conf.getTrimmedStringCollection
            (DFSConfigKeys.DFS_NAMESERVICES);
  } else {
    // Ensure that the internal service is ineed in the list of all available
    // nameservices.
    Set<String> availableNameServices = Sets.newHashSet(conf
            .getTrimmedStringCollection(DFSConfigKeys.DFS_NAMESERVICES));
    for (String nsId : parentNameServices) {
      if (!availableNameServices.contains(nsId)) {
        throw new IOException("Unknown nameservice: " + nsId);
      }
    }
  }

  Map<String, Map<String, InetSocketAddress>> addressList =
          getAddressesForNsIds(conf, parentNameServices, defaultAddress,
                  DFS_NAMENODE_SERVICE_RPC_ADDRESS_KEY, DFS_NAMENODE_RPC_ADDRESS_KEY);
  if (addressList.isEmpty()) {
    throw new IOException("Incorrect configuration: namenode address "
            + DFS_NAMENODE_SERVICE_RPC_ADDRESS_KEY + " or "
            + DFS_NAMENODE_RPC_ADDRESS_KEY
            + " is not configured.");
  }
  return addressList;
}
 

import org.apache.hadoop.conf.Configuration; //導入方法依賴的package包/類
private static Collection<URI> getStorageDirs(Configuration conf,
                                              String propertyName) {
  Collection<String> dirNames = conf.getTrimmedStringCollection(propertyName);
  StartupOption startOpt = NameNode.getStartupOption(conf);
  if(startOpt == StartupOption.IMPORT) {
    // In case of IMPORT this will get rid of default directories 
    // but will retain directories specified in hdfs-site.xml
    // When importing image from a checkpoint, the name-node can
    // start with empty set of storage directories.
    Configuration cE = new HdfsConfiguration(false);
    cE.addResource("core-default.xml");
    cE.addResource("core-site.xml");
    cE.addResource("hdfs-default.xml");
    Collection<String> dirNames2 = cE.getTrimmedStringCollection(propertyName);
    dirNames.removeAll(dirNames2);
    if(dirNames.isEmpty())
      LOG.warn("!!! WARNING !!!" +
        "\n\tThe NameNode currently runs without persistent storage." +
        "\n\tAny changes to the file system meta-data may be lost." +
        "\n\tRecommended actions:" +
        "\n\t\t- shutdown and restart NameNode with configured \"" 
        + propertyName + "\" in hdfs-site.xml;" +
        "\n\t\t- use Backup Node as a persistent and up-to-date storage " +
        "of the file system meta-data.");
  } else if (dirNames.isEmpty()) {
    dirNames = Collections.singletonList(
        DFSConfigKeys.DFS_NAMENODE_EDITS_DIR_DEFAULT);
  }
  return Util.stringCollectionAsURIs(dirNames);
}
 

import org.apache.hadoop.conf.Configuration; //導入方法依賴的package包/類
/**
 * Returns edit directories that are shared between primary and secondary.
 * @param conf configuration
 * @return collection of edit directories from {@code conf}
 */
public static List<URI> getSharedEditsDirs(Configuration conf) {
  // don't use getStorageDirs here, because we want an empty default
  // rather than the dir in /tmp
  Collection<String> dirNames = conf.getTrimmedStringCollection(
      DFS_NAMENODE_SHARED_EDITS_DIR_KEY);
  return Util.stringCollectionAsURIs(dirNames);
}
 

import org.apache.hadoop.conf.Configuration; //導入方法依賴的package包/類
/**
 * Retrieve checkpoint dirs from configuration.
 *
 * @param conf the Configuration
 * @param defaultValue a default value for the attribute, if null
 * @return a Collection of URIs representing the values in 
 * dfs.namenode.checkpoint.dir configuration property
 */
static Collection<URI> getCheckpointDirs(Configuration conf,
    String defaultValue) {
  Collection<String> dirNames = conf.getTrimmedStringCollection(
      DFSConfigKeys.DFS_NAMENODE_CHECKPOINT_DIR_KEY);
  if (dirNames.size() == 0 && defaultValue != null) {
    dirNames.add(defaultValue);
  }
  return Util.stringCollectionAsURIs(dirNames);
}
 

import org.apache.hadoop.conf.Configuration; //導入方法依賴的package包/類
static List<URI> getCheckpointEditsDirs(Configuration conf,
    String defaultName) {
  Collection<String> dirNames = conf.getTrimmedStringCollection(
      DFSConfigKeys.DFS_NAMENODE_CHECKPOINT_EDITS_DIR_KEY);
  if (dirNames.size() == 0 && defaultName != null) {
    dirNames.add(defaultName);
  }
  return Util.stringCollectionAsURIs(dirNames);
}
 

import org.apache.hadoop.conf.Configuration; //導入方法依賴的package包/類
public static List<StorageLocation> getStorageLocations(Configuration conf) {
  Collection<String> rawLocations =
      conf.getTrimmedStringCollection(DFS_DATANODE_DATA_DIR_KEY);
  List<StorageLocation> locations =
      new ArrayList<StorageLocation>(rawLocations.size());

  for(String locationString : rawLocations) {
    final StorageLocation location;
    try {
      location = StorageLocation.parse(locationString);
    } catch (IOException ioe) {
      LOG.error("Failed to initialize storage directory " + locationString
          + ". Exception details: " + ioe);
      // Ignore the exception.
      continue;
    } catch (SecurityException se) {
      LOG.error("Failed to initialize storage directory " + locationString
                   + ". Exception details: " + se);
      // Ignore the exception.
      continue;
    }

    locations.add(location);
  }

  return locations;
}
 

import org.apache.hadoop.conf.Configuration; //導入方法依賴的package包/類
/**
 * @param conf the Configuration of HBase
 * @param srcFs
 * @param desFs
 * @return Whether srcFs and desFs are on same hdfs or not
 */
public static boolean isSameHdfs(Configuration conf, FileSystem srcFs, FileSystem desFs) {
  // By getCanonicalServiceName, we could make sure both srcFs and desFs
  // show a unified format which contains scheme, host and port.
  String srcServiceName = srcFs.getCanonicalServiceName();
  String desServiceName = desFs.getCanonicalServiceName();

  if (srcServiceName == null || desServiceName == null) {
    return false;
  }
  if (srcServiceName.equals(desServiceName)) {
    return true;
  }
  if (srcServiceName.startsWith("ha-hdfs") && desServiceName.startsWith("ha-hdfs")) {
    Collection<String> internalNameServices =
        conf.getTrimmedStringCollection("dfs.internal.nameservices");
    if (!internalNameServices.isEmpty()) {
      if (internalNameServices.contains(srcServiceName.split(":")[1])) {
        return true;
      } else {
        return false;
      }
    }
  }
  if (srcFs instanceof DistributedFileSystem && desFs instanceof DistributedFileSystem) {
    //If one serviceName is an HA format while the other is a non-HA format,
    // maybe they refer to the same FileSystem.
    //For example, srcFs is "ha-hdfs://nameservices" and desFs is "hdfs://activeNamenode:port"
    Set<InetSocketAddress> srcAddrs = getNNAddresses((DistributedFileSystem) srcFs, conf);
    Set<InetSocketAddress> desAddrs = getNNAddresses((DistributedFileSystem) desFs, conf);
    if (Sets.intersection(srcAddrs, desAddrs).size() > 0) {
      return true;
    }
  }

  return false;
}
 

import org.apache.hadoop.conf.Configuration; //導入方法依賴的package包/類
/**
 * Returns collection of nameservice Ids from the configuration.
 * @param conf configuration
 * @return collection of nameservice Ids, or null if not specified
 */
public static Collection<String> getNameServiceIds(Configuration conf) {
  return conf.getTrimmedStringCollection(DFS_NAMESERVICES);
}
 

import org.apache.hadoop.conf.Configuration; //導入方法依賴的package包/類
/**
 * Namenode HighAvailability related configuration.
 * Returns collection of namenode Ids from the configuration. One logical id
 * for each namenode in the in the HA setup.
 *
 * @param conf configuration
 * @param nsId the nameservice ID to look at, or null for non-federated
 * @return collection of namenode Ids
 */
public static Collection<String> getNameNodeIds(Configuration conf, String nsId) {
  String key = addSuffix(DFS_HA_NAMENODES_KEY_PREFIX, nsId);
  return conf.getTrimmedStringCollection(key);
}
 

import org.apache.hadoop.conf.Configuration; //導入方法依賴的package包/類
/**
 * Namenode HighAvailability related configuration.
 * Returns collection of namenode Ids from the configuration. One logical id
 * for each namenode in the in the HA setup.
 * 
 * @param conf configuration
 * @param nsId the nameservice ID to look at, or null for non-federated 
 * @return collection of namenode Ids
 */
public static Collection<String> getNameNodeIds(Configuration conf, String nsId) {
  String key = addSuffix(DFS_HA_NAMENODES_KEY_PREFIX, nsId);
  return conf.getTrimmedStringCollection(key);
}