/**
* Copyright 2007 The Apache Software Foundation
*
* 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.hadoop.hbase;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.Iterator;
import java.util.TreeMap;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.dfs.MiniDFSCluster;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.hbase.util.Writables;
/** Test case for get */
public class TestGet extends HBaseTestCase {
private static final Log LOG = LogFactory.getLog(TestGet.class.getName());
private static final Text CONTENTS = new Text("contents:");
private static final Text ROW_KEY =
new Text(HGlobals.rootRegionInfo.regionName);
private static final String SERVER_ADDRESS = "foo.bar.com:1234";
private void verifyGet(final HRegion r, final String expectedServer)
throws IOException {
// This should return a value because there is only one family member
byte [] value = r.get(ROW_KEY, CONTENTS);
assertNotNull(value);
// This should not return a value because there are multiple family members
value = r.get(ROW_KEY, HConstants.COLUMN_FAMILY);
assertNull(value);
// Find out what getFull returns
TreeMap<Text, byte []> values = r.getFull(ROW_KEY);
// assertEquals(4, values.keySet().size());
for(Iterator<Text> i = values.keySet().iterator(); i.hasNext(); ) {
Text column = i.next();
if (column.equals(HConstants.COL_SERVER)) {
String server = Writables.bytesToString(values.get(column));
assertEquals(expectedServer, server);
LOG.info(server);
}
}
}
/**
* the test
* @throws IOException
*/
public void testGet() throws IOException {
MiniDFSCluster cluster = null;
try {
// Initialization
cluster = new MiniDFSCluster(conf, 2, true, (String[])null);
FileSystem fs = cluster.getFileSystem();
Path dir = new Path("/hbase");
fs.mkdirs(dir);
HTableDescriptor desc = new HTableDescriptor("test");
desc.addFamily(new HColumnDescriptor(CONTENTS.toString()));
desc.addFamily(new HColumnDescriptor(HConstants.COLUMN_FAMILY.toString()));
HRegionInfo info = new HRegionInfo(0L, desc, null, null);
Path regionDir = HRegion.getRegionDir(dir, info.regionName);
fs.mkdirs(regionDir);
HLog log = new HLog(fs, new Path(regionDir, "log"), conf);
HRegion r = new HRegion(dir, log, fs, conf, info, null);
// Write information to the table
long lockid = r.startUpdate(ROW_KEY);
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
DataOutputStream s = new DataOutputStream(bytes);
CONTENTS.write(s);
r.put(lockid, CONTENTS, bytes.toByteArray());
bytes.reset();
HGlobals.rootRegionInfo.write(s);
r.put(lockid, HConstants.COL_REGIONINFO,
Writables.getBytes(HGlobals.rootRegionInfo));
r.commit(lockid, System.currentTimeMillis());
lockid = r.startUpdate(ROW_KEY);
r.put(lockid, HConstants.COL_SERVER,
Writables.stringToBytes(new HServerAddress(SERVER_ADDRESS).toString()));
r.put(lockid, HConstants.COL_STARTCODE, Writables.longToBytes(lockid));
r.put(lockid, new Text(HConstants.COLUMN_FAMILY + "region"),
"region".getBytes(HConstants.UTF8_ENCODING));
r.commit(lockid, System.currentTimeMillis());
// Verify that get works the same from memcache as when reading from disk
// NOTE dumpRegion won't work here because it only reads from disk.
verifyGet(r, SERVER_ADDRESS);
// Close and re-open region, forcing updates to disk
r.close();
log.rollWriter();
r = new HRegion(dir, log, fs, conf, info, null);
// Read it back
verifyGet(r, SERVER_ADDRESS);
// Update one family member and add a new one
lockid = r.startUpdate(ROW_KEY);
r.put(lockid, new Text(HConstants.COLUMN_FAMILY + "region"),
"region2".getBytes(HConstants.UTF8_ENCODING));
String otherServerName = "bar.foo.com:4321";
r.put(lockid, HConstants.COL_SERVER,
Writables.stringToBytes(new HServerAddress(otherServerName).toString()));
r.put(lockid, new Text(HConstants.COLUMN_FAMILY + "junk"),
"junk".getBytes(HConstants.UTF8_ENCODING));
r.commit(lockid, System.currentTimeMillis());
verifyGet(r, otherServerName);
// Close region and re-open it
r.close();
log.rollWriter();
r = new HRegion(dir, log, fs, conf, info, null);
// Read it back
verifyGet(r, otherServerName);
// Close region once and for all
r.close();
log.closeAndDelete();
} finally {
if(cluster != null) {
cluster.shutdown();
}
}
}
}