HBASE-2495 Allow record filtering with selected row key values in HBase Export
git-svn-id: https://svn.apache.org/repos/asf/hbase/trunk@1081889 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael Stack
parent
b56b88e984
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b408cc1217
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@ -109,6 +109,8 @@ Release 0.91.0 - Unreleased
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HBASE-3618 Add to HBase book, 'schema' chapter - pre-creating regions and
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key types (Doug Meil via Stack)
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HBASE-3610 Improve RegionSplitter performance
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HBASE-2495 Allow record filtering with selected row key values in HBase
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Export (Subbu M Iyer via Stack)
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TASK
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HBASE-3559 Move report of split to master OFF the heartbeat channel
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@ -1,22 +1,22 @@
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/**
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* Copyright 2009 The Apache Software Foundation
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*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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* Copyright 2009 The Apache Software Foundation
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*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.hadoop.hbase.mapreduce;
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import java.io.IOException;
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@ -26,6 +26,11 @@ import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.hbase.HBaseConfiguration;
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import org.apache.hadoop.hbase.client.Result;
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import org.apache.hadoop.hbase.client.Scan;
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import org.apache.hadoop.hbase.filter.PrefixFilter;
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import org.apache.hadoop.hbase.filter.RowFilter;
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import org.apache.hadoop.hbase.filter.RegexStringComparator;
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import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;
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import org.apache.hadoop.hbase.filter.Filter;
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import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
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import org.apache.hadoop.hbase.util.Bytes;
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import org.apache.hadoop.mapreduce.Job;
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@ -36,10 +41,10 @@ import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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/**
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* Export an HBase table.
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* Writes content to sequence files up in HDFS. Use {@link Import} to read it
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* back in again.
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*/
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* Export an HBase table.
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* Writes content to sequence files up in HDFS. Use {@link Import} to read it
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* back in again.
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*/
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public class Export {
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private static final Log LOG = LogFactory.getLog(Export.class);
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final static String NAME = "export";
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@ -84,20 +89,8 @@ public class Export {
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Job job = new Job(conf, NAME + "_" + tableName);
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job.setJobName(NAME + "_" + tableName);
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job.setJarByClass(Exporter.class);
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// TODO: Allow passing filter and subset of rows/columns.
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Scan s = new Scan();
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// Optional arguments.
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int versions = args.length > 2? Integer.parseInt(args[2]): 1;
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s.setMaxVersions(versions);
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long startTime = args.length > 3? Long.parseLong(args[3]): 0L;
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long endTime = args.length > 4? Long.parseLong(args[4]): Long.MAX_VALUE;
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s.setTimeRange(startTime, endTime);
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s.setCacheBlocks(false);
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if (conf.get(TableInputFormat.SCAN_COLUMN_FAMILY) != null) {
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s.addFamily(Bytes.toBytes(conf.get(TableInputFormat.SCAN_COLUMN_FAMILY)));
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}
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LOG.info("verisons=" + versions + ", starttime=" + startTime +
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", endtime=" + endTime);
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// Set optional scan parameters
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Scan s = getConfiguredScanForJob(conf, args);
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TableMapReduceUtil.initTableMapperJob(tableName, s, Exporter.class, null,
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null, job);
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// No reducers. Just write straight to output files.
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@ -109,6 +102,46 @@ public class Export {
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return job;
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}
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private static Scan getConfiguredScanForJob(Configuration conf, String[] args) throws IOException {
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Scan s = new Scan();
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// Optional arguments.
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// Set Scan Versions
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int versions = args.length > 2? Integer.parseInt(args[2]): 1;
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s.setMaxVersions(versions);
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// Set Scan Range
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long startTime = args.length > 3? Long.parseLong(args[3]): 0L;
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long endTime = args.length > 4? Long.parseLong(args[4]): Long.MAX_VALUE;
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s.setTimeRange(startTime, endTime);
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// Set cache blocks
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s.setCacheBlocks(false);
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// Set Scan Column Family
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if (conf.get(TableInputFormat.SCAN_COLUMN_FAMILY) != null) {
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s.addFamily(Bytes.toBytes(conf.get(TableInputFormat.SCAN_COLUMN_FAMILY)));
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}
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// Set RowFilter or Prefix Filter if applicable.
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Filter exportFilter = getExportFilter(args);
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if (exportFilter!= null) {
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LOG.info("Setting Scan Filter for Export.");
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s.setFilter(exportFilter);
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}
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LOG.info("verisons=" + versions + ", starttime=" + startTime +
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", endtime=" + endTime);
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return s;
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}
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private static Filter getExportFilter(String[] args) {
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Filter exportFilter = null;
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String filterCriteria = (args.length > 5) ? args[5]: null;
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if (filterCriteria == null) return null;
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if (filterCriteria.startsWith("^")) {
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String regexPattern = filterCriteria.substring(1, filterCriteria.length());
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exportFilter = new RowFilter(CompareOp.EQUAL, new RegexStringComparator(regexPattern));
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} else {
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exportFilter = new PrefixFilter(Bytes.toBytes(filterCriteria));
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}
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return exportFilter;
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}
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/*
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* @param errorMsg Error message. Can be null.
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*/
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@ -117,7 +150,7 @@ public class Export {
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System.err.println("ERROR: " + errorMsg);
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}
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System.err.println("Usage: Export [-D <property=value>]* <tablename> <outputdir> [<versions> " +
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"[<starttime> [<endtime>]]]\n");
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"[<starttime> [<endtime>]] [^[regex pattern] or [Prefix] to filter]]\n");
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System.err.println(" Note: -D properties will be applied to the conf used. ");
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System.err.println(" For example: ");
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System.err.println(" -D mapred.output.compress=true");
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@ -144,4 +177,4 @@ public class Export {
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Job job = createSubmittableJob(conf, otherArgs);
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System.exit(job.waitForCompletion(true)? 0 : 1);
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}
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}
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}
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