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HADOOP-1543 [base] Add HClient.tableExists 

M    src/java/org/apache/hadoop/hbase/HClient.java
    (tableExists): Added
M    CHANGES.txt
M    src/java/org/apache/hadoop/hbase/package.html
    Fix javadoc.


git-svn-id: https://svn.apache.org/repos/asf/lucene/hadoop/trunk/src/contrib/hbase@551725 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Michael Stack 2007-06-28 22:29:07 +00:00
parent 2fa16d4fdf
commit 96c64712e6
3 changed files with 19 additions and 2 deletions
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2
CHANGES.txt
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@ -42,4 +42,4 @@ Trunk (unreleased changes)
24. HADOOP-1534. [hbase] Memcache scanner fails if start key not present 24. HADOOP-1534. [hbase] Memcache scanner fails if start key not present
25. HADOOP-1537. Catch exceptions in testCleanRegionServerExit so we can see 25. HADOOP-1537. Catch exceptions in testCleanRegionServerExit so we can see
what is failing. what is failing.
26. HADOOP-1543 [hbase] Add HClient.tableExists

17
src/java/org/apache/hadoop/hbase/HClient.java
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@ -126,6 +126,23 @@ public class HClient implements HConstants {
this.rand = new Random(); this.rand = new Random();
} }
/**
* @param tableName Table to check.
* @return True if table exists already.
* @throws IOException
*/
public boolean tableExists(final Text tableName) throws IOException {
HTableDescriptor [] tables = listTables();
boolean result = false;
for (int i = 0; i < tables.length; i++) {
if (tables[i].getName().equals(tableName)) {
result = true;
break;
}
}
return result;
}
protected void handleRemoteException(RemoteException e) throws IOException { protected void handleRemoteException(RemoteException e) throws IOException {
String msg = e.getMessage(); String msg = e.getMessage();
if(e.getClassName().equals("org.apache.hadoop.hbase.InvalidColumnNameException")) { if(e.getClassName().equals("org.apache.hadoop.hbase.InvalidColumnNameException")) {

2
src/java/org/apache/hadoop/hbase/package.html
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@ -18,7 +18,7 @@ Set <code>JAVA_HOME</code> to the root of your Java installation</li>
<p>First, you need a working instance of Hadoop. Download a recent release from <p>First, you need a working instance of Hadoop. Download a recent release from
<a href="http://www.apache.org/dyn/closer.cgi/lucene/hadoop/">Hadoop downloads</a>. <a href="http://www.apache.org/dyn/closer.cgi/lucene/hadoop/">Hadoop downloads</a>.
Unpack the release and connect to its top-level directory. Let this be Unpack the release and connect to its top-level directory. Let this be
<code>${HADOOP_HOME}. Edit the file <code>${HADOOP_HOME}/conf/hadoop-env.sh</code> <code>${HADOOP_HOME}</code>. Edit the file <code>${HADOOP_HOME}/conf/hadoop-env.sh</code>
to define at least <code>JAVA_HOME</code>. Also, add site-particular to define at least <code>JAVA_HOME</code>. Also, add site-particular
customizations to the file <code>${HADOOP_HOME}/conf/hadoop-site.xml</code>. customizations to the file <code>${HADOOP_HOME}/conf/hadoop-site.xml</code>.
Try the following command: <pre>bin/hadoop Try the following command: <pre>bin/hadoop