Examples of org.apache.hadoop.fs.FileSystem.concat()

org.apache.hadoop.fs.FileSystem.concat()
Concat existing files together. @param trg the path to the target destination. @param psrcs the paths to the sources to use for the concatenation. @throws IOException

      DFSTestUtil.createFile(fs, path1, 1024, (short) 3, 0);
      DFSTestUtil.createFile(fs, path2, 1024, (short) 3, 0);
      DFSTestUtil.createFile(fs, path3, 1024, (short) 3, 0);
      fs.close();
      fs = getHttpFSFileSystem();
      fs.concat(path1, new Path[]{path2, path3});
      fs.close();
      fs = FileSystem.get(config);
      Assert.assertTrue(fs.exists(path1));
      Assert.assertFalse(fs.exists(path2));
      Assert.assertFalse(fs.exists(path3));

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      DFSTestUtil.createFile(fs, path1, 1024, (short) 3, 0);
      DFSTestUtil.createFile(fs, path2, 1024, (short) 3, 0);
      DFSTestUtil.createFile(fs, path3, 1024, (short) 3, 0);
      fs.close();
      fs = getHttpFSFileSystem();
      fs.concat(path1, new Path[]{path2, path3});
      fs.close();
      fs = FileSystem.get(config);
      Assert.assertTrue(fs.exists(path1));
      Assert.assertFalse(fs.exists(path2));
      Assert.assertFalse(fs.exists(path3));

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      DFSTestUtil.createFile(fs, path1, 1024, (short) 3, 0);
      DFSTestUtil.createFile(fs, path2, 1024, (short) 3, 0);
      DFSTestUtil.createFile(fs, path3, 1024, (short) 3, 0);
      fs.close();
      fs = getHttpFSFileSystem();
      fs.concat(path1, new Path[]{path2, path3});
      fs.close();
      fs = FileSystem.get(config);
      Assert.assertTrue(fs.exists(path1));
      Assert.assertFalse(fs.exists(path2));
      Assert.assertFalse(fs.exists(path3));

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      DFSTestUtil.createFile(fs, path1, 1024, (short) 3, 0);
      DFSTestUtil.createFile(fs, path2, 1024, (short) 3, 0);
      DFSTestUtil.createFile(fs, path3, 1024, (short) 3, 0);
      fs.close();
      fs = getHttpFSFileSystem();
      fs.concat(path1, new Path[]{path2, path3});
      fs.close();
      fs = FileSystem.get(config);
      Assert.assertTrue(fs.exists(path1));
      Assert.assertFalse(fs.exists(path2));
      Assert.assertFalse(fs.exists(path3));

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