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https://issues.apache.org/jira/browse/HBASE-16183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15364147#comment-15364147
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li xiang commented on HBASE-16183:
----------------------------------
Hi Yu, I updated the description. Sorry...
> Correct errors in example program of coprocessor in Ref Guide
> -------------------------------------------------------------
>
> Key: HBASE-16183
> URL: https://issues.apache.org/jira/browse/HBASE-16183
> Project: HBase
> Issue Type: Bug
> Components: documentation
> Reporter: li xiang
> Assignee: li xiang
> Priority: Minor
>
> 1. In Section 89.3.3
> change
> String path = "hdfs://<namenode>:<port>/user/<hadoop-user>/coprocessor.jar";
> into
> Path path = new
> Path("hdfs://bdavm1506.svl.ibm.com:8020/user/hbase/coprocessor.jar");
> reason
> The second parameter of HTableDescriptor.addCoprocessor() is
> org.apache.hadoop.fs.Path, not String.
> See
> http://hbase.apache.org/devapidocs/org/apache/hadoop/hbase/HTableDescriptor.html
> 2. In Section 89.3.3
> change
> HBaseAdmin admin = new HBaseAdmin(conf);
> into
> Connection connection = ConnectionFactory.createConnection(conf);
> Admin admin = connection.getAdmin();
> reason
> HBASE-12083 makes new HBaseAdmin() deprecated and the instance of Admin is
> supposed to get from Connection.getAdmin()
> Also see
> http://hbase.apache.org/devapidocs/org/apache/hadoop/hbase/client/HBaseAdmin.html
> 3. In section 90.1
> change
> public void preGetOp(final ObserverContext e, final Get get, final List
> results)
> into
> public void preGetOp(final ObserverContext<RegionCoprocessorEnvironment> e,
> final Get get, final List<Cell> results)
> change
> List kvs = new ArrayList(results.size());
> into
> List<Cell> kvs = new ArrayList<Cell>(results.size());
> change
> public RegionScanner preScannerOpen(final ObserverContext e, final Scan
> scan,
> into
> preScannerOpen(final ObserverContext<RegionCoprocessorEnvironment> e, final
> Scan scan，
> change
> public boolean postScannerNext(final ObserverContext e, final
> InternalScanner s,
> final List results, final int limit, final boolean hasMore) throws
> IOException {
> into
> public boolean postScannerNext(final
> ObserverContext<RegionCoprocessorEnvironment> e, final InternalScanner s,
> inal List<Result> results, final int limit, final boolean hasMore) throws
> IOException {
> change
> Iterator iterator = results.iterator();
> into
> Iterator<Result> iterator = results.iterator();
> reason
> Generic
> 4. In section 90.1
> change
> preGet(e, get, kvs);
> into
> super.preGetOp(e, get, kvs);
> reason
> There is not a function called preGet() provided by BaseRegionObserver or
> its super class/interface. I believe we need to call preGetOp() of the super
> class of RegionObserverExample here.
> 5. In section 90.1
> change
> kvs.add(KeyValueUtil.ensureKeyValue(c));
> into
> kvs.add(c);
> reason
> KeyValueUtil.ensureKeyValue() is deprecated.
> See
> http://hbase.apache.org/devapidocs/org/apache/hadoop/hbase/KeyValueUtil.html
> and https://issues.apache.org/jira/browse/HBASE-12079
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