Example usage for org.apache.hadoop.security UserGroupInformation createUserForTesting

Introduction

In this page you can find the example usage for org.apache.hadoop.security UserGroupInformation createUserForTesting.

Prototype

@InterfaceAudience.Public
@InterfaceStability.Evolving
public static UserGroupInformation createUserForTesting(String user, String[] userGroups) 

Source Link

Document

Create a UGI for testing HDFS and MapReduce

Usage

From source file:org.apache.coheigea.bigdata.hbase.ranger.HBaseRangerAuthorizationTest.java

License:Apache License

@org.junit.Test
public void testWriteRowAsGroupPublic() throws Exception {
    final Configuration conf = HBaseConfiguration.create();
    conf.set("hbase.zookeeper.quorum", "localhost");
    conf.set("hbase.zookeeper.property.clientPort", "" + port);
    conf.set("zookeeper.znode.parent", "/hbase-unsecure");

    String user = "bob";
    if ("bob".equals(System.getProperty("user.name"))) {
        user = "alice";
    }//from w w  w  .ja  v  a 2  s  .  co  m
    UserGroupInformation ugi = UserGroupInformation.createUserForTesting(user, new String[] { "public" });
    ugi.doAs(new PrivilegedExceptionAction<Void>() {
        public Void run() throws Exception {
            Connection conn = ConnectionFactory.createConnection(conf);
            Table table = conn.getTable(TableName.valueOf("temp"));

            // Add a new row
            try {
                Put put = new Put(Bytes.toBytes("row3"));
                put.addColumn(Bytes.toBytes("colfam1"), Bytes.toBytes("col1"), Bytes.toBytes("val2"));
                table.put(put);
                Assert.fail("Failure expected on an unauthorized user");
            } catch (IOException ex) {
                // expected
            }

            conn.close();
            return null;
        }
    });
}

---

From source file:org.apache.coheigea.bigdata.hbase.ranger.HBaseRangerAuthorizationTest.java

License:Apache License

@org.junit.Test
public void testWriteRowInColFam2AsGroupIT() throws Exception {
    final Configuration conf = HBaseConfiguration.create();
    conf.set("hbase.zookeeper.quorum", "localhost");
    conf.set("hbase.zookeeper.property.clientPort", "" + port);
    conf.set("zookeeper.znode.parent", "/hbase-unsecure");

    String user = "bob";
    if ("bob".equals(System.getProperty("user.name"))) {
        user = "alice";
    }//from w w  w . ja v a  2s  .  c  om
    UserGroupInformation ugi = UserGroupInformation.createUserForTesting(user, new String[] { "IT" });
    ugi.doAs(new PrivilegedExceptionAction<Void>() {
        public Void run() throws Exception {
            Connection conn = ConnectionFactory.createConnection(conf);
            Table table = conn.getTable(TableName.valueOf("temp"));

            // Add a new row
            try {
                Put put = new Put(Bytes.toBytes("row3"));
                put.addColumn(Bytes.toBytes("colfam2"), Bytes.toBytes("col1"), Bytes.toBytes("val2"));
                table.put(put);
                Assert.fail("Failure expected on an unauthorized user");
            } catch (IOException ex) {
                // expected
            }

            conn.close();
            return null;
        }
    });
}

---

From source file:org.apache.coheigea.bigdata.hbase.ranger.HBaseRangerAuthorizationTest.java

License:Apache License

@org.junit.Test
public void testReadRowInAnotherTable() throws Exception {
    final Configuration conf = HBaseConfiguration.create();
    conf.set("hbase.zookeeper.quorum", "localhost");
    conf.set("hbase.zookeeper.property.clientPort", "" + port);
    conf.set("zookeeper.znode.parent", "/hbase-unsecure");

    Connection conn = ConnectionFactory.createConnection(conf);
    Admin admin = conn.getAdmin();/* www .  j  a v  a 2s  . co  m*/

    // Create a new table as process owner
    HTableDescriptor tableDescriptor = new HTableDescriptor(TableName.valueOf("temp4"));

    // Adding column families to table descriptor
    tableDescriptor.addFamily(new HColumnDescriptor("colfam1"));
    tableDescriptor.addFamily(new HColumnDescriptor("colfam2"));

    admin.createTable(tableDescriptor);

    // Write a value
    Put put = new Put(Bytes.toBytes("row1"));
    put.addColumn(Bytes.toBytes("colfam1"), Bytes.toBytes("col1"), Bytes.toBytes("val1"));
    Table table = conn.getTable(TableName.valueOf("temp4"));
    table.put(put);

    // Read a row
    Get get = new Get(Bytes.toBytes("row1"));
    Result result = table.get(get);
    byte[] valResult = result.getValue(Bytes.toBytes("colfam2"), Bytes.toBytes("col1"));
    Assert.assertNull(valResult);

    conn.close();

    // Now try to read the row as group "IT" - it should fail as "IT" can only read from table "temp"
    String user = "bob";
    if ("bob".equals(System.getProperty("user.name"))) {
        user = "alice";
    }
    UserGroupInformation ugi = UserGroupInformation.createUserForTesting(user, new String[] { "IT" });
    ugi.doAs(new PrivilegedExceptionAction<Void>() {
        public Void run() throws Exception {
            Connection conn = ConnectionFactory.createConnection(conf);
            Table table = conn.getTable(TableName.valueOf("temp4"));

            // Read a row
            try {
                Get get = new Get(Bytes.toBytes("row1"));
                table.get(get);
                Assert.fail("Failure expected on an unauthorized user");
            } catch (IOException ex) {
                // expected
            }

            conn.close();
            return null;
        }
    });

    // Now disable and delete as process owner
    conn = ConnectionFactory.createConnection(conf);
    admin = conn.getAdmin();
    admin.disableTable(TableName.valueOf("temp4"));
    admin.deleteTable(TableName.valueOf("temp4"));

    conn.close();
}

---

From source file:org.apache.coheigea.bigdata.hbase.ranger.HBaseRangerAuthorizationTest.java

License:Apache License

@org.junit.Test
public void testDeleteRowAsGroupIT() throws Exception {
    final Configuration conf = HBaseConfiguration.create();
    conf.set("hbase.zookeeper.quorum", "localhost");
    conf.set("hbase.zookeeper.property.clientPort", "" + port);
    conf.set("zookeeper.znode.parent", "/hbase-unsecure");

    Connection conn = ConnectionFactory.createConnection(conf);
    Table table = conn.getTable(TableName.valueOf("temp"));

    // Add a new row (as process owner)
    Put put = new Put(Bytes.toBytes("row5"));
    put.addColumn(Bytes.toBytes("colfam1"), Bytes.toBytes("col1"), Bytes.toBytes("val2"));
    table.put(put);//from   w ww  .j av  a  2s  .c om

    String user = "bob";
    if ("bob".equals(System.getProperty("user.name"))) {
        user = "alice";
    }
    UserGroupInformation ugi = UserGroupInformation.createUserForTesting(user, new String[] { "IT" });
    ugi.doAs(new PrivilegedExceptionAction<Void>() {
        public Void run() throws Exception {
            Connection conn = ConnectionFactory.createConnection(conf);
            Table table = conn.getTable(TableName.valueOf("temp"));

            try {
                // Delete the new row
                Delete delete = new Delete(Bytes.toBytes("row5"));
                table.delete(delete);
                Assert.fail("Failure expected on an unauthorized user");
            } catch (IOException ex) {
                // expected
            }

            conn.close();
            return null;
        }
    });

    // Delete the new row (as process owner)
    Delete delete = new Delete(Bytes.toBytes("row5"));
    table.delete(delete);

    conn.close();
}

---

From source file:org.apache.coheigea.bigdata.hbase.ranger.HBaseRangerAuthorizationTest.java

License:Apache License

@org.junit.Test
public void testTagBasedTablePolicy() throws Exception {
    final Configuration conf = HBaseConfiguration.create();
    conf.set("hbase.zookeeper.quorum", "localhost");
    conf.set("hbase.zookeeper.property.clientPort", "" + port);
    conf.set("zookeeper.znode.parent", "/hbase-unsecure");

    final HTableDescriptor tableDescriptor = new HTableDescriptor(TableName.valueOf("temp3"));

    // Adding column families to table descriptor
    tableDescriptor.addFamily(new HColumnDescriptor("colfam1"));
    tableDescriptor.addFamily(new HColumnDescriptor("colfam2"));

    // Try to create a "temp3" table as the "IT" group - this should fail
    String user = "bob";
    if ("bob".equals(System.getProperty("user.name"))) {
        user = "alice";
    }/*from  ww  w.  ja  v a2s  .  co m*/

    // Try to create the table as the "IT" group - this should fail
    UserGroupInformation ugi = UserGroupInformation.createUserForTesting(user, new String[] { "IT" });
    ugi.doAs(new PrivilegedExceptionAction<Void>() {
        public Void run() throws Exception {
            Connection conn = ConnectionFactory.createConnection(conf);
            Admin admin = conn.getAdmin();

            try {
                admin.createTable(tableDescriptor);
                Assert.fail("Failure expected on an unauthorized user");
            } catch (IOException ex) {
                // expected
            }

            conn.close();
            return null;
        }
    });

    // Now try to create the table as the "dev" group - this should work
    ugi = UserGroupInformation.createUserForTesting(user, new String[] { "dev" });
    ugi.doAs(new PrivilegedExceptionAction<Void>() {
        public Void run() throws Exception {
            Connection conn = ConnectionFactory.createConnection(conf);
            Admin admin = conn.getAdmin();

            admin.createTable(tableDescriptor);

            conn.close();
            return null;
        }
    });

    // Drop the table
    Connection conn = ConnectionFactory.createConnection(conf);
    Admin admin = conn.getAdmin();

    admin.disableTable(TableName.valueOf("temp3"));
    admin.deleteTable(TableName.valueOf("temp3"));

    conn.close();
}

---

From source file:org.apache.coheigea.bigdata.hbase.ranger.HBaseRangerAuthorizationTest.java

License:Apache License

@org.junit.Test
public void testTagBasedColumnFamilyPolicy() throws Exception {
    final Configuration conf = HBaseConfiguration.create();
    conf.set("hbase.zookeeper.quorum", "localhost");
    conf.set("hbase.zookeeper.property.clientPort", "" + port);
    conf.set("zookeeper.znode.parent", "/hbase-unsecure");

    // Create a new table as process owner
    final HTableDescriptor tableDescriptor = new HTableDescriptor(TableName.valueOf("temp3"));

    // Adding column families to table descriptor
    tableDescriptor.addFamily(new HColumnDescriptor("colfam1"));
    tableDescriptor.addFamily(new HColumnDescriptor("colfam2"));

    Connection conn = ConnectionFactory.createConnection(conf);
    Admin admin = conn.getAdmin();// ww w . j  av a 2  s  . c  o m

    admin.createTable(tableDescriptor);

    // Add a new row
    Put put = new Put(Bytes.toBytes("row1"));
    put.addColumn(Bytes.toBytes("colfam1"), Bytes.toBytes("col1"), Bytes.toBytes("val1"));
    Table table = conn.getTable(TableName.valueOf("temp3"));
    table.put(put);

    put = new Put(Bytes.toBytes("row1"));
    put.addColumn(Bytes.toBytes("colfam2"), Bytes.toBytes("col1"), Bytes.toBytes("val2"));
    table.put(put);

    conn.close();

    String user = "bob";
    if ("bob".equals(System.getProperty("user.name"))) {
        user = "alice";
    }
    UserGroupInformation ugi = UserGroupInformation.createUserForTesting(user, new String[] { "dev" });
    ugi.doAs(new PrivilegedExceptionAction<Void>() {
        public Void run() throws Exception {
            Connection conn = ConnectionFactory.createConnection(conf);
            Table table = conn.getTable(TableName.valueOf("temp3"));

            // Try to read the "colfam1" of the "temp3" table as the "dev" group - this should work
            Get get = new Get(Bytes.toBytes("row1"));
            Result result = table.get(get);
            byte[] valResult = result.getValue(Bytes.toBytes("colfam1"), Bytes.toBytes("col1"));
            Assert.assertTrue(Arrays.equals(valResult, Bytes.toBytes("val1")));

            // Now try to read the "colfam2" column family of the temp3 table - this should fail
            get = new Get(Bytes.toBytes("row1"));
            result = table.get(get);
            valResult = result.getValue(Bytes.toBytes("colfam2"), Bytes.toBytes("col1"));
            Assert.assertNull(valResult);

            conn.close();
            return null;
        }
    });

    // Now try to read colfam1 as the "IT" group - this should fail
    ugi = UserGroupInformation.createUserForTesting(user, new String[] { "IT" });
    ugi.doAs(new PrivilegedExceptionAction<Void>() {
        public Void run() throws Exception {
            Connection conn = ConnectionFactory.createConnection(conf);
            Table table = conn.getTable(TableName.valueOf("temp3"));

            Get get = new Get(Bytes.toBytes("row1"));
            try {
                table.get(get);
                Assert.fail("Failure expected on an unauthorized user");
            } catch (IOException ex) {
                // expected
            }

            return null;
        }
    });

    // Drop the table
    conn = ConnectionFactory.createConnection(conf);
    admin = conn.getAdmin();

    admin.disableTable(TableName.valueOf("temp3"));
    admin.deleteTable(TableName.valueOf("temp3"));

    conn.close();
}

---

From source file:org.apache.coheigea.bigdata.hbase.ranger.HBaseRangerAuthorizationTest.java

License:Apache License

@org.junit.Test
public void testTagBasedColumnPolicy() throws Exception {
    final Configuration conf = HBaseConfiguration.create();
    conf.set("hbase.zookeeper.quorum", "localhost");
    conf.set("hbase.zookeeper.property.clientPort", "" + port);
    conf.set("zookeeper.znode.parent", "/hbase-unsecure");

    // Create a new table as process owner
    final HTableDescriptor tableDescriptor = new HTableDescriptor(TableName.valueOf("temp3"));

    // Adding column families to table descriptor
    tableDescriptor.addFamily(new HColumnDescriptor("colfam1"));
    tableDescriptor.addFamily(new HColumnDescriptor("colfam2"));

    Connection conn = ConnectionFactory.createConnection(conf);
    Admin admin = conn.getAdmin();/*from   w w w .j  a va 2  s .c o m*/

    admin.createTable(tableDescriptor);

    // Add a new row
    Put put = new Put(Bytes.toBytes("row1"));
    put.addColumn(Bytes.toBytes("colfam1"), Bytes.toBytes("col1"), Bytes.toBytes("val1"));
    Table table = conn.getTable(TableName.valueOf("temp3"));
    table.put(put);

    put = new Put(Bytes.toBytes("row1"));
    put.addColumn(Bytes.toBytes("colfam2"), Bytes.toBytes("col1"), Bytes.toBytes("val2"));
    table.put(put);

    conn.close();

    String user = "bob";
    if ("bob".equals(System.getProperty("user.name"))) {
        user = "alice";
    }
    UserGroupInformation ugi = UserGroupInformation.createUserForTesting(user, new String[] { "dev" });
    ugi.doAs(new PrivilegedExceptionAction<Void>() {
        public Void run() throws Exception {
            Connection conn = ConnectionFactory.createConnection(conf);
            Table table = conn.getTable(TableName.valueOf("temp3"));

            // Try to write something to the "col1" column of the "colfam1" of the "temp3" table as the "dev" group 
            // - this should work
            Put put = new Put(Bytes.toBytes("row3"));
            put.addColumn(Bytes.toBytes("colfam1"), Bytes.toBytes("col1"), Bytes.toBytes("val2"));
            table.put(put);

            // Try to write something to the "col2" column of the "colfam1" of the "temp3" table as the "dev" group 
            // - this should fail
            put = new Put(Bytes.toBytes("row3"));
            put.addColumn(Bytes.toBytes("colfam1"), Bytes.toBytes("col2"), Bytes.toBytes("val2"));
            try {
                table.put(put);
                Assert.fail("Failure expected on an unauthorized user");
            } catch (IOException ex) {
                // expected
            }

            conn.close();
            return null;
        }
    });

    ugi = UserGroupInformation.createUserForTesting(user, new String[] { "IT" });
    ugi.doAs(new PrivilegedExceptionAction<Void>() {
        public Void run() throws Exception {
            Connection conn = ConnectionFactory.createConnection(conf);
            Table table = conn.getTable(TableName.valueOf("temp3"));

            // Try to write something to the "col1" column of the "colfam1" of the "temp3" table as the "IT" group 
            // - this should fail
            Put put = new Put(Bytes.toBytes("row3"));
            put.addColumn(Bytes.toBytes("colfam1"), Bytes.toBytes("col1"), Bytes.toBytes("val2"));
            try {
                table.put(put);
                Assert.fail("Failure expected on an unauthorized user");
            } catch (IOException ex) {
                // expected
            }

            conn.close();
            return null;
        }
    });

    // Drop the table
    conn = ConnectionFactory.createConnection(conf);
    admin = conn.getAdmin();

    admin.disableTable(TableName.valueOf("temp3"));
    admin.deleteTable(TableName.valueOf("temp3"));

    conn.close();
}

---

From source file:org.apache.coheigea.bigdata.hdfs.ranger.HDFSRangerTest.java

License:Apache License

@org.junit.Test
public void readTest() throws Exception {
    FileSystem fileSystem = hdfsCluster.getFileSystem();

    // Write a file - the AccessControlEnforcer won't be invoked as we are the "superuser"
    final Path file = new Path("/tmp/tmpdir/data-file2");
    FSDataOutputStream out = fileSystem.create(file);
    for (int i = 0; i < 1024; ++i) {
        out.write(("data" + i + "\n").getBytes("UTF-8"));
        out.flush();//www. ja va2 s. c o m
    }
    out.close();

    // Change permissions to read-only
    fileSystem.setPermission(file, new FsPermission(FsAction.READ, FsAction.NONE, FsAction.NONE));

    // Now try to read the file as "bob" - this should be allowed (by the policy - user)
    UserGroupInformation ugi = UserGroupInformation.createUserForTesting("bob", new String[] {});
    ugi.doAs(new PrivilegedExceptionAction<Void>() {

        public Void run() throws Exception {
            Configuration conf = new Configuration();
            conf.set("fs.defaultFS", defaultFs);

            FileSystem fs = FileSystem.get(conf);

            // Read the file
            FSDataInputStream in = fs.open(file);
            ByteArrayOutputStream output = new ByteArrayOutputStream();
            IOUtils.copy(in, output);
            String content = new String(output.toByteArray());
            Assert.assertTrue(content.startsWith("data0"));

            fs.close();
            return null;
        }
    });

    // Now try to read the file as "alice" - this should be allowed (by the policy - group)
    ugi = UserGroupInformation.createUserForTesting("alice", new String[] { "IT" });
    ugi.doAs(new PrivilegedExceptionAction<Void>() {

        public Void run() throws Exception {
            Configuration conf = new Configuration();
            conf.set("fs.defaultFS", defaultFs);

            FileSystem fs = FileSystem.get(conf);

            // Read the file
            FSDataInputStream in = fs.open(file);
            ByteArrayOutputStream output = new ByteArrayOutputStream();
            IOUtils.copy(in, output);
            String content = new String(output.toByteArray());
            Assert.assertTrue(content.startsWith("data0"));

            fs.close();
            return null;
        }
    });

    // Now try to read the file as unknown user "eve" - this should not be allowed
    ugi = UserGroupInformation.createUserForTesting("eve", new String[] {});
    ugi.doAs(new PrivilegedExceptionAction<Void>() {

        public Void run() throws Exception {
            Configuration conf = new Configuration();
            conf.set("fs.defaultFS", defaultFs);

            FileSystem fs = FileSystem.get(conf);

            // Read the file
            try {
                fs.open(file);
                Assert.fail("Failure expected on an incorrect permission");
            } catch (RemoteException ex) {
                // expected
                Assert.assertTrue(RangerAccessControlException.class.getName().equals(ex.getClassName()));
            }

            fs.close();
            return null;
        }
    });

    // Now try to read the file as known user "dave" - this should not be allowed, as he doesn't have the correct permissions
    ugi = UserGroupInformation.createUserForTesting("dave", new String[] {});
    ugi.doAs(new PrivilegedExceptionAction<Void>() {

        public Void run() throws Exception {
            Configuration conf = new Configuration();
            conf.set("fs.defaultFS", defaultFs);

            FileSystem fs = FileSystem.get(conf);

            // Read the file
            try {
                fs.open(file);
                Assert.fail("Failure expected on an incorrect permission");
            } catch (RemoteException ex) {
                // expected
                Assert.assertTrue(RangerAccessControlException.class.getName().equals(ex.getClassName()));
            }

            fs.close();
            return null;
        }
    });
}

---

From source file:org.apache.coheigea.bigdata.hdfs.ranger.HDFSRangerTest.java

License:Apache License

@org.junit.Test
public void writeTest() throws Exception {

    FileSystem fileSystem = hdfsCluster.getFileSystem();

    // Write a file - the AccessControlEnforcer won't be invoked as we are the "superuser"
    final Path file = new Path("/tmp/tmpdir2/data-file3");
    FSDataOutputStream out = fileSystem.create(file);
    for (int i = 0; i < 1024; ++i) {
        out.write(("data" + i + "\n").getBytes("UTF-8"));
        out.flush();/*from   w  w w  .j  a v  a  2s . co  m*/
    }
    out.close();

    // Now try to write to the file as "bob" - this should be allowed (by the policy - user)
    UserGroupInformation ugi = UserGroupInformation.createUserForTesting("bob", new String[] {});
    ugi.doAs(new PrivilegedExceptionAction<Void>() {

        public Void run() throws Exception {
            Configuration conf = new Configuration();
            conf.set("fs.defaultFS", defaultFs);

            FileSystem fs = FileSystem.get(conf);

            // Write to the file
            fs.append(file);

            fs.close();
            return null;
        }
    });

    // Now try to write to the file as "alice" - this should be allowed (by the policy - group)
    ugi = UserGroupInformation.createUserForTesting("alice", new String[] { "IT" });
    ugi.doAs(new PrivilegedExceptionAction<Void>() {

        public Void run() throws Exception {
            Configuration conf = new Configuration();
            conf.set("fs.defaultFS", defaultFs);

            FileSystem fs = FileSystem.get(conf);

            // Write to the file
            fs.append(file);

            fs.close();
            return null;
        }
    });

    // Now try to read the file as unknown user "eve" - this should not be allowed
    ugi = UserGroupInformation.createUserForTesting("eve", new String[] {});
    ugi.doAs(new PrivilegedExceptionAction<Void>() {

        public Void run() throws Exception {
            Configuration conf = new Configuration();
            conf.set("fs.defaultFS", defaultFs);

            FileSystem fs = FileSystem.get(conf);

            // Write to the file
            try {
                fs.append(file);
                Assert.fail("Failure expected on an incorrect permission");
            } catch (RemoteException ex) {
                // expected
                Assert.assertTrue(RangerAccessControlException.class.getName().equals(ex.getClassName()));
            }

            fs.close();
            return null;
        }
    });

    // Now try to read the file as known user "dave" - this should not be allowed, as he doesn't have the correct permissions
    ugi = UserGroupInformation.createUserForTesting("dave", new String[] {});
    ugi.doAs(new PrivilegedExceptionAction<Void>() {

        public Void run() throws Exception {
            Configuration conf = new Configuration();
            conf.set("fs.defaultFS", defaultFs);

            FileSystem fs = FileSystem.get(conf);

            // Write to the file
            try {
                fs.append(file);
                Assert.fail("Failure expected on an incorrect permission");
            } catch (RemoteException ex) {
                // expected
                Assert.assertTrue(RangerAccessControlException.class.getName().equals(ex.getClassName()));
            }

            fs.close();
            return null;
        }
    });
}

---

From source file:org.apache.coheigea.bigdata.hdfs.ranger.HDFSRangerTest.java

License:Apache License

@org.junit.Test
public void executeTest() throws Exception {
    FileSystem fileSystem = hdfsCluster.getFileSystem();

    // Write a file - the AccessControlEnforcer won't be invoked as we are the "superuser"
    final Path file = new Path("/tmp/tmpdir3/data-file2");
    FSDataOutputStream out = fileSystem.create(file);
    for (int i = 0; i < 1024; ++i) {
        out.write(("data" + i + "\n").getBytes("UTF-8"));
        out.flush();// w  w w  .  ja  va  2 s  .co  m
    }
    out.close();

    // Change permissions to read-only
    fileSystem.setPermission(file, new FsPermission(FsAction.READ, FsAction.NONE, FsAction.NONE));

    // Change the parent directory permissions to be execute only for the owner
    Path parentDir = new Path("/tmp/tmpdir3");
    fileSystem.setPermission(parentDir, new FsPermission(FsAction.EXECUTE, FsAction.NONE, FsAction.NONE));

    // Try to read the directory as "bob" - this should be allowed (by the policy - user)
    UserGroupInformation ugi = UserGroupInformation.createUserForTesting("bob", new String[] {});
    ugi.doAs(new PrivilegedExceptionAction<Void>() {

        public Void run() throws Exception {
            Configuration conf = new Configuration();
            conf.set("fs.defaultFS", defaultFs);

            FileSystem fs = FileSystem.get(conf);

            RemoteIterator<LocatedFileStatus> iter = fs.listFiles(file.getParent(), false);
            Assert.assertTrue(iter.hasNext());

            fs.close();
            return null;
        }
    });

    // Try to read the directory as "alice" - this should be allowed (by the policy - group)
    ugi = UserGroupInformation.createUserForTesting("alice", new String[] { "IT" });
    ugi.doAs(new PrivilegedExceptionAction<Void>() {

        public Void run() throws Exception {
            Configuration conf = new Configuration();
            conf.set("fs.defaultFS", defaultFs);

            FileSystem fs = FileSystem.get(conf);

            RemoteIterator<LocatedFileStatus> iter = fs.listFiles(file.getParent(), false);
            Assert.assertTrue(iter.hasNext());

            fs.close();
            return null;
        }
    });

    // Now try to read the directory as unknown user "eve" - this should not be allowed
    ugi = UserGroupInformation.createUserForTesting("eve", new String[] {});
    ugi.doAs(new PrivilegedExceptionAction<Void>() {

        public Void run() throws Exception {
            Configuration conf = new Configuration();
            conf.set("fs.defaultFS", defaultFs);

            FileSystem fs = FileSystem.get(conf);

            // Write to the file
            try {
                RemoteIterator<LocatedFileStatus> iter = fs.listFiles(file.getParent(), false);
                Assert.assertTrue(iter.hasNext());
                Assert.fail("Failure expected on an incorrect permission");
            } catch (RemoteException ex) {
                // expected
                Assert.assertTrue(RangerAccessControlException.class.getName().equals(ex.getClassName()));
            }

            fs.close();
            return null;
        }
    });

    // Now try to read the directory as known user "dave" - this should not be allowed, as he doesn't have the correct permissions
    ugi = UserGroupInformation.createUserForTesting("dave", new String[] {});
    ugi.doAs(new PrivilegedExceptionAction<Void>() {

        public Void run() throws Exception {
            Configuration conf = new Configuration();
            conf.set("fs.defaultFS", defaultFs);

            FileSystem fs = FileSystem.get(conf);

            // Write to the file
            try {
                RemoteIterator<LocatedFileStatus> iter = fs.listFiles(file.getParent(), false);
                Assert.assertTrue(iter.hasNext());
                Assert.fail("Failure expected on an incorrect permission");
            } catch (RemoteException ex) {
                // expected
                Assert.assertTrue(RangerAccessControlException.class.getName().equals(ex.getClassName()));
            }

            fs.close();
            return null;
        }
    });
}

---

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