Examples of org.apache.hadoop.fs.viewfs.ChRootedFileSystem

org.apache.hadoop.fs.viewfs.ChRootedFileSystem
with chRoot at /usr/foo, the members will be setup as shown below.
- myFs is the base file system and points to hdfs at nn1
- myURI is hdfs://nn1/user/foo
- chRootPathPart is /user/foo
- workingDir is a directory related to chRoot
The paths are resolved as follows by ChRootedFileSystem:
- Absolute path /a/b/c is resolved to /user/foo/a/b/c at myFs
- Relative path x/y is resolved to /user/foo//x/y

  public void testURIEmptyPath() throws IOException {
    Configuration conf = new Configuration();
    conf.setClass("fs.mockfs.impl", MockFileSystem.class, FileSystem.class);


    URI chrootUri = URI.create("mockfs://foo");
    new ChRootedFileSystem(chrootUri, conf);
  }

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  public void testAclMethodsPathTranslation() throws IOException {
    Configuration conf = new Configuration();
    conf.setClass("fs.mockfs.impl", MockFileSystem.class, FileSystem.class);


    URI chrootUri = URI.create("mockfs://foo/a/b");
    ChRootedFileSystem chrootFs = new ChRootedFileSystem(chrootUri, conf);
    FileSystem mockFs = ((FilterFileSystem)chrootFs.getRawFileSystem())
        .getRawFileSystem();


    Path chrootPath = new Path("/c");
    Path rawPath = new Path("/a/b/c");
    List<AclEntry> entries = Collections.emptyList();


    chrootFs.modifyAclEntries(chrootPath, entries);
    verify(mockFs).modifyAclEntries(rawPath, entries);


    chrootFs.removeAclEntries(chrootPath, entries);
    verify(mockFs).removeAclEntries(rawPath, entries);


    chrootFs.removeDefaultAcl(chrootPath);
    verify(mockFs).removeDefaultAcl(rawPath);


    chrootFs.removeAcl(chrootPath);
    verify(mockFs).removeAcl(rawPath);


    chrootFs.setAcl(chrootPath, entries);
    verify(mockFs).setAcl(rawPath, entries);


    chrootFs.getAclStatus(chrootPath);
    verify(mockFs).getAclStatus(rawPath);
  }

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    fSysTarget.mkdirs(chrootedTo);




    // ChRoot to the root of the testDirectory
    fSys = new ChRootedFileSystem(chrootedTo.toUri(), conf);
  }

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  public void testDeleteOnExitPathHandling() throws IOException {
    Configuration conf = new Configuration();
    conf.setClass("fs.mockfs.impl", MockFileSystem.class, FileSystem.class);
        
    URI chrootUri = URI.create("mockfs://foo/a/b");
    ChRootedFileSystem chrootFs = new ChRootedFileSystem(chrootUri, conf);
    FileSystem mockFs = ((FilterFileSystem)chrootFs.getRawFileSystem())
        .getRawFileSystem();
    
    // ensure delete propagates the correct path
    Path chrootPath = new Path("/c");
    Path rawPath = new Path("/a/b/c");
    chrootFs.delete(chrootPath, false);
    verify(mockFs).delete(eq(rawPath), eq(false));
    reset(mockFs);
 
    // fake that the path exists for deleteOnExit
    FileStatus stat = mock(FileStatus.class);
    when(mockFs.getFileStatus(eq(rawPath))).thenReturn(stat);
    // ensure deleteOnExit propagates the correct path
    chrootFs.deleteOnExit(chrootPath);
    chrootFs.close();
    verify(mockFs).delete(eq(rawPath), eq(true));
  }

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    fSysTarget.mkdirs(chrootedTo);




    // ChRoot to the root of the testDirectory
    fSys = new ChRootedFileSystem(chrootedTo.toUri(), conf);
  }

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  public void testDeleteOnExitPathHandling() throws IOException {
    Configuration conf = new Configuration();
    conf.setClass("fs.mockfs.impl", MockFileSystem.class, FileSystem.class);
        
    URI chrootUri = URI.create("mockfs://foo/a/b");
    ChRootedFileSystem chrootFs = new ChRootedFileSystem(chrootUri, conf);
    FileSystem mockFs = ((FilterFileSystem)chrootFs.getRawFileSystem())
        .getRawFileSystem();
    
    // ensure delete propagates the correct path
    Path chrootPath = new Path("/c");
    Path rawPath = new Path("/a/b/c");
    chrootFs.delete(chrootPath, false);
    verify(mockFs).delete(eq(rawPath), eq(false));
    reset(mockFs);
 
    // fake that the path exists for deleteOnExit
    FileStatus stat = mock(FileStatus.class);
    when(mockFs.getFileStatus(eq(rawPath))).thenReturn(stat);
    // ensure deleteOnExit propagates the correct path
    chrootFs.deleteOnExit(chrootPath);
    chrootFs.close();
    verify(mockFs).delete(eq(rawPath), eq(true));
  }

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  public void testURIEmptyPath() throws IOException {
    Configuration conf = new Configuration();
    conf.setClass("fs.mockfs.impl", MockFileSystem.class, FileSystem.class);


    URI chrootUri = URI.create("mockfs://foo");
    new ChRootedFileSystem(chrootUri, conf);
  }

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org.apache.hadoop.fs.Path

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