TestLease.java
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上传日期:2018-01-08
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- /**
- * 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.*;
- import org.apache.hadoop.conf.Configuration;
- import org.apache.hadoop.fs.FileSystem;
- import org.apache.hadoop.fs.Path;
- public class TestLease extends junit.framework.TestCase {
- static boolean hasLease(MiniDFSCluster cluster, Path src) {
- return cluster.getNameNode().namesystem.leaseManager.getLeaseByPath(src.toString()) != null;
- }
-
- final Path dir = new Path("/test/lease/");
- public void testLease() throws Exception {
- Configuration conf = new Configuration();
- MiniDFSCluster cluster = new MiniDFSCluster(conf, 2, true, null);
- try {
- FileSystem fs = cluster.getFileSystem();
- assertTrue(fs.mkdirs(dir));
-
- Path a = new Path(dir, "a");
- Path b = new Path(dir, "b");
- DataOutputStream a_out = fs.create(a);
- a_out.writeBytes("something");
- assertTrue(hasLease(cluster, a));
- assertTrue(!hasLease(cluster, b));
-
- DataOutputStream b_out = fs.create(b);
- b_out.writeBytes("something");
- assertTrue(hasLease(cluster, a));
- assertTrue(hasLease(cluster, b));
- a_out.close();
- b_out.close();
- assertTrue(!hasLease(cluster, a));
- assertTrue(!hasLease(cluster, b));
-
- fs.delete(dir, true);
- } finally {
- if (cluster != null) {cluster.shutdown();}
- }
- }
- }