Examples of HTableTokenBucket

org.apache.hadoop.hbase.stargate.util.HTableTokenBucket
A HTable-backed token bucket.
Can be configured with rate, the number of tokens to add to the bucket each second, and size, the maximum number of tokens allowed to burst. Configuration is stored in the HTable adjacent to the token count and is periodically refreshed.
Expected columns:
- user:
  - user:tokens
  - user:tokens.rate
  - user:tokens.size

Examples of org.apache.hadoop.hbase.stargate.util.HTableTokenBucket

      table.flushCommits();
    }
  }


  public void testTokenBucketConfig() throws Exception {
    HTableTokenBucket tb = new HTableTokenBucket(conf, TABLE, 
      Bytes.toBytes(USER_TOKEN));
    assertEquals(tb.getRate(), RATE);
    assertEquals(tb.getSize(), SIZE);
  }

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Examples of org.apache.hadoop.hbase.stargate.util.HTableTokenBucket

   */
  public boolean userRequestLimit(final User user, int want) 
      throws IOException {
    if (multiuser) {
      UserData ud = SoftUserData.get(user);
      HTableTokenBucket tb = (HTableTokenBucket) ud.get(UserData.TOKENBUCKET);
      if (tb == null) {
        tb = new HTableTokenBucket(conf, Bytes.toBytes(user.getToken()));
        ud.put(UserData.TOKENBUCKET, tb);
      }
      if (tb.available() < want) {
        return false;
      }
      tb.remove(want);
    }
    return true;
  }

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Examples of org.apache.hadoop.hbase.stargate.util.HTableTokenBucket

    assertEquals(tb.getRate(), RATE);
    assertEquals(tb.getSize(), SIZE);
  }


  public void testTokenBucket() throws Exception {
    HTableTokenBucket tb = new HTableTokenBucket(conf, TABLE, 
      Bytes.toBytes(USER_TOKEN));
    int last = 0;
    for (int i = 0; i <= 5 && last < 10; i++) {
      int avail = tb.available();
      assertTrue("bucket did not increment", avail > last);
      assertTrue("bucket updated too quickly", avail - last < 3);
      last = avail;
      Thread.sleep(2000);
    }

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