Examples of org.apache.hadoop.hdfs.security.AccessTokenHandler

org.apache.hadoop.hdfs.security.AccessTokenHandler
AccessTokenHandler can be instantiated in 2 modes, master mode and slave mode. Master can generate new access keys and export access keys to slaves, while slaves can only import and use access keys received from master. Both master and slave can generate and verify access tokens. Typically, master mode is used by NN and slave mode is used by DN.

    }
    this.safeMode = new SafeModeInfo(conf);
    this.hostsReader = new HostsFileReader(conf.get("dfs.hosts",""),
                        conf.get("dfs.hosts.exclude",""));
    if (isAccessTokenEnabled) {
      accessTokenHandler = new AccessTokenHandler(true,
          accessKeyUpdateInterval, accessTokenLifetime);
    }
  }

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        long accessKeyUpdateInterval = keys.getKeyUpdateInterval();
        long accessTokenLifetime = keys.getTokenLifetime();
        LOG.info("Access token params received from NN: keyUpdateInterval="
            + accessKeyUpdateInterval / (60 * 1000) + " min(s), tokenLifetime="
            + accessTokenLifetime / (60 * 1000) + " min(s)");
        this.accessTokenHandler = new AccessTokenHandler(false,
            accessKeyUpdateInterval, accessTokenLifetime);
      }
      isAccessTokenInitialized = true;
    }

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      long accessKeyUpdateInterval = keys.getKeyUpdateInterval();
      long accessTokenLifetime = keys.getTokenLifetime();
      LOG.info("Access token params received from NN: keyUpdateInterval="
          + accessKeyUpdateInterval / (60 * 1000) + " min(s), tokenLifetime="
          + accessTokenLifetime / (60 * 1000) + " min(s)");
      this.accessTokenHandler = new AccessTokenHandler(false,
          accessKeyUpdateInterval, accessTokenLifetime);
      this.accessTokenHandler.setKeys(keys);
      /*
       * Balancer should sync its access keys with NN more frequently than NN
       * updates its access keys

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