/**
* 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.hdfs;
import java.io.IOException;
import java.util.Collection;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.test.system.DNClient;
import org.apache.hadoop.hdfs.test.system.HDFSCluster;
import org.apache.hadoop.hdfs.test.system.NNClient;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.mortbay.util.ajax.JSON;
public class TestHL040 {
private HDFSCluster cluster = null;
private static final Log LOG = LogFactory.getLog(TestHL040.class);
public TestHL040() throws Exception {
}
@Before
public void setupUp() throws Exception {
cluster = HDFSCluster.createCluster(new Configuration());
cluster.setUp();
}
@After
public void tearDown() throws Exception {
cluster.tearDown();
}
@Test
public void testConnect() throws IOException {
LOG.info("Staring TestHL040: connecting to the HDFSCluster ");
LOG.info("================ Getting namenode info ================");
NNClient dfsMaster = cluster.getNNClient();
LOG.info("Process info of namenode " + dfsMaster.getHostName() + " is: " +
dfsMaster.getProcessInfo());
LOG.info("================ Getting datanode info ================");
Collection<DNClient> clients = cluster.getDNClients();
for (DNClient dnC : clients) {
LOG.info("Process info of datanode " + dnC.getHostName() + " is: " +
dnC.getProcessInfo());
Assert.assertNotNull("Datanode process info isn't suppose to be null",
dnC.getProcessInfo());
LOG.info("Free space " + readAttr(dnC));
}
}
private long readAttr(DNClient dnC) throws IOException {
Object volObj = dnC.getDaemonAttribute("VolumeInfo");
Assert.assertNotNull("Attribute value is expected to be not null", volObj);
LOG.debug("Got object: " + volObj);
Map volInfoMap = (Map) JSON.parse(volObj.toString());
long totalFreeSpace = 0L;
for (Object key : volInfoMap.keySet()) {
Map attrMap = (Map) volInfoMap.get(key);
long freeSpace = (Long) attrMap.get("freeSpace");
totalFreeSpace += freeSpace;
}
return totalFreeSpace;
}
}