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From joshelser <...@git.apache.org>
Subject [GitHub] accumulo pull request #224: ACCUMULO-4500 ACCUMULO-96 Added summarization
Date Wed, 01 Mar 2017 16:49:58 GMT
Github user joshelser commented on a diff in the pull request:

    https://github.com/apache/accumulo/pull/224#discussion_r103723297
  
    --- Diff: core/src/main/java/org/apache/accumulo/core/client/admin/SummaryRetriever.java
---
    @@ -0,0 +1,107 @@
    +/*
    + * 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.accumulo.core.client.admin;
    +
    +import java.util.Collection;
    +import java.util.List;
    +
    +import org.apache.accumulo.core.client.AccumuloException;
    +import org.apache.accumulo.core.client.AccumuloSecurityException;
    +import org.apache.accumulo.core.client.TableNotFoundException;
    +import org.apache.accumulo.core.client.summary.SummarizerConfiguration;
    +import org.apache.accumulo.core.client.summary.Summary;
    +import org.apache.hadoop.io.Text;
    +
    +/**
    + * This interface allows configuring where and which summary data to retrieve before
retrieving it.
    + *
    + * @since 2.0.0
    + */
    +public interface SummaryRetriever {
    +
    +  /**
    +   * Summary data is only retrieved from data that has been written to files. Data recently
written to Accumulo may be in memory and there will not show up in
    +   * summary data. Setting this option to true force tablets in the range to minor compact
before summary data is retrieved. By default the table will not be
    +   * flushed before retrieving summary data.
    +   *
    +   * @return this
    +   */
    +  SummaryRetriever flush(boolean shouldFlush);
    +
    +  /**
    +   * Allows optionally setting start row before retrieving data. The start row is not
inclusive.
    +   */
    +  SummaryRetriever startRow(Text startRow);
    +
    +  /**
    +   * Allows optionally setting start row before retrieving data. The start row is not
inclusive.
    +   */
    +  SummaryRetriever startRow(CharSequence startRow);
    +
    +  /**
    +   * Allows optionally setting end row before retrieving data. The end row is inclusive.
    +   */
    +  SummaryRetriever endRow(Text endRow);
    +
    +  /**
    +   * Allows optionally setting end row before retrieving data. The end row is inclusive.
    +   */
    +  SummaryRetriever endRow(CharSequence endRow);
    +
    +  /**
    +   * Gets summaries generated with a configuration that matches the given regex. For
a given SummarizationConfiguration it is matched in exactly the following
    +   * way. This allows the regex to match on classname and options.
    --- End diff --
    
    It's not obvious to me what this method is doing under the hood and I don't think the
code snippet helps.


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