Package org.apache.hadoop.hdfs

Examples of org.apache.hadoop.hdfs.DistributedFileSystem.create()

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      runCommand(admin, new String[]{"-clrQuota", childDir0.toString()}, false);
      c = dfs.getContentSummary(childDir0);
      assertEquals(c.getQuota(), -1);
     
      // 10: create a file /test/datafile1
      fout = dfs.create(childFile1, replication);
     
      // 10.s: but writing fileLen bytes should result in an quota exception
      hasException = false;
      try {
        fout.write(new byte[fileLen]);
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  doAnswer(delayAnswer).when(spyBytesWritten).inc(anyInt());
  metrics.bytesWritten = spyBytesWritten;

  try {
      // create a new file.
      FSDataOutputStream stm = fs.create(p);
      stm.write(1);
      stm.sync();
      stm.write(2);
      stm.close();
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    // no check, if it's not it throws an exception which is what we want
    DistributedFileSystem dfs =
      (DistributedFileSystem)cluster.getFileSystem();
    // OP_ADD 0, OP_SET_GENSTAMP 10
    Path pathFileCreate = new Path("/file_create");
    FSDataOutputStream s = dfs.create(pathFileCreate);
    // OP_CLOSE 9
    s.close();
    // OP_RENAME 1
    Path pathFileMoved = new Path("/file_moved");
    dfs.rename(pathFileCreate, pathFileMoved);
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    dfs.delete(pathFileMoved, false);
    // OP_MKDIR 3
    Path pathDirectoryMkdir = new Path("/directory_mkdir");
    dfs.mkdirs(pathDirectoryMkdir);
    // OP_SET_REPLICATION 4
    s = dfs.create(pathFileCreate);
    s.close();
    dfs.setReplication(pathFileCreate, (short)1);
    // OP_SET_PERMISSIONS 7
    Short permission = 0777;
    dfs.setPermission(pathFileCreate, new FsPermission(permission));
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    try {
      cluster.waitActive();
      DistributedFileSystem fs = (DistributedFileSystem) cluster.getFileSystem();

      Path testFile = new Path("/testFlushNanosMetric.txt");
      FSDataOutputStream fout = fs.create(testFile);
      fout.write(new byte[1]);
      fout.hsync();
      fout.close();
      List<DataNode> datanodes = cluster.getDataNodes();
      DataNode datanode = datanodes.get(0);
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      //create a file, write some data and leave it open.
      final Path p = new Path("/foo");
      final int size = (1 << 16) + RAN.nextInt(1 << 16);
      LOG.info("size = " + size);
      final FSDataOutputStream out = fs.create(p, REPLICATION);
      final byte[] bytes = new byte[1024];
      for(int remaining = size; remaining > 0; ) {
        RAN.nextBytes(bytes);
        final int len = bytes.length < remaining? bytes.length: remaining;
        out.write(bytes, 0, len);
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        }
      }
 
      //create a file with one replica.
      final Path p = new Path(f);
      final FSDataOutputStream out = dfs.create(p, (short)1);
      out.write(1);
      out.close();
 
      //get replica location.
      final LocatedBlocks locatedblocks = NameNodeAdapter.getBlockLocations(
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    cluster.waitActive();
    DistributedFileSystem fs = (DistributedFileSystem) cluster.getFileSystem();
    OutputStream out = null;
    try {
      fs.mkdirs(new Path("/test-target"));
      out = fs.create(new Path("/test-source/foo")); // don't close
      fs.rename(new Path("/test-source/"), new Path("/test-target/"));

      fs.setSafeMode(SafeModeAction.SAFEMODE_ENTER);
      cluster.getNameNodeRpc().saveNamespace();
      fs.setSafeMode(SafeModeAction.SAFEMODE_LEAVE);
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  }

  private void testAcl(boolean persistNamespace) throws IOException {
    Path p = new Path("/p");
    DistributedFileSystem fs = cluster.getFileSystem();
    fs.create(p).close();
    fs.mkdirs(new Path("/23"));

    AclEntry e = new AclEntry.Builder().setName("foo")
        .setPermission(READ_EXECUTE).setScope(ACCESS).setType(USER).build();
    fs.modifyAclEntries(p, Lists.newArrayList(e));
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    fs.mkdirs(dirPath);
    List<AclEntry> aclSpec = Lists.newArrayList(
      aclEntry(DEFAULT, USER, "foo", ALL));
    fs.setAcl(dirPath, aclSpec);

    fs.create(filePath).close();
    fs.mkdirs(subdirPath);

    AclEntry[] fileExpected = new AclEntry[] {
      aclEntry(ACCESS, USER, "foo", ALL),
      aclEntry(ACCESS, GROUP, READ_EXECUTE) };
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