TestViewFSOverloadSchemeCentralMountTableConfig.java
/**
* 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,
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* See the License for the specific language governing permissions and
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*/
package org.apache.hadoop.fs.viewfs;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.net.URISyntaxException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.junit.Before;
/**
* Test the TestViewFSOverloadSchemeCentralMountTableConfig with mount-table
* configuration files in configured fs location.
*/
public class TestViewFSOverloadSchemeCentralMountTableConfig
extends TestViewFileSystemOverloadSchemeLocalFileSystem {
private Path oldMountTablePath;
private Path latestMountTablepath;
@Before
public void setUp() throws Exception {
super.setUp();
// Mount table name format: mount-table.<versionNumber>.xml
String mountTableFileName1 = "mount-table.1.xml";
String mountTableFileName2 = "mount-table.2.xml";
oldMountTablePath =
new Path(getTestRoot() + File.separator + mountTableFileName1);
latestMountTablepath =
new Path(getTestRoot() + File.separator + mountTableFileName2);
getConf().set(Constants.CONFIG_VIEWFS_MOUNTTABLE_PATH,
getTestRoot().toString());
File f = new File(oldMountTablePath.toUri());
f.createNewFile(); // Just creating empty mount-table file.
File f2 = new File(latestMountTablepath.toUri());
latestMountTablepath = new Path(f2.toURI());
f2.createNewFile();
}
/**
* This method saves the mount links in a local files.
*/
@Override
void addMountLinks(String mountTable, String[] sources, String[] targets,
Configuration conf) throws IOException, URISyntaxException {
// we don't use conf here, instead we use config paths to store links.
// Mount-table old version file mount-table-<version>.xml
try (BufferedWriter out = new BufferedWriter(
new FileWriter(new File(oldMountTablePath.toUri())))) {
out.write("<configuration>\n");
// Invalid tag. This file should not be read.
out.write("</\\\name//\\>");
out.write("</configuration>\n");
out.flush();
}
ViewFsTestSetup.addMountLinksToFile(mountTable, sources, targets,
latestMountTablepath, conf);
}
}