Java JsonUtil.toJsonString方法代码示例

import org.apache.hadoop.hdfs.web.JsonUtil; //导入方法依赖的package包/类
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause)
        throws Exception {
  Exception e = cause instanceof Exception ? (Exception) cause : new
    Exception(cause);
  final String output = JsonUtil.toJsonString(e);
  ByteBuf content = Unpooled.wrappedBuffer(output.getBytes(Charsets.UTF_8));
  final DefaultFullHttpResponse resp = new DefaultFullHttpResponse(
          HTTP_1_1, INTERNAL_SERVER_ERROR, content);

  resp.headers().set(CONTENT_TYPE, APPLICATION_JSON_UTF8);
  if (e instanceof IllegalArgumentException) {
    resp.setStatus(BAD_REQUEST);
  } else if (e instanceof FileNotFoundException) {
    resp.setStatus(NOT_FOUND);
  } else if (e instanceof IOException) {
    resp.setStatus(FORBIDDEN);
  }
  resp.headers().set(CONTENT_LENGTH, resp.content().readableBytes());
  resp.headers().set(CONNECTION, CLOSE);
  ctx.write(resp).addListener(ChannelFutureListener.CLOSE);
}
 

import org.apache.hadoop.hdfs.web.JsonUtil; //导入方法依赖的package包/类
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause)
        throws Exception {
  Exception e = cause instanceof Exception ? (Exception) cause : new
    Exception(cause);
  final String output = JsonUtil.toJsonString(e);
  ByteBuf content = Unpooled.wrappedBuffer(output.getBytes(Charsets.UTF_8));
  final DefaultFullHttpResponse resp = new DefaultFullHttpResponse(
          HTTP_1_1, INTERNAL_SERVER_ERROR, content);

  resp.headers().set(CONTENT_TYPE, APPLICATION_JSON_UTF8);
  if (e instanceof IllegalArgumentException) {
    resp.setStatus(BAD_REQUEST);
  } else if (e instanceof FileNotFoundException) {
    resp.setStatus(NOT_FOUND);
  }

  resp.headers().set(CONTENT_LENGTH, resp.content().readableBytes());
  resp.headers().set(CONNECTION, CLOSE);
  ctx.write(resp).addListener(ChannelFutureListener.CLOSE);
}
 

import org.apache.hadoop.hdfs.web.JsonUtil; //导入方法依赖的package包/类
private Response delete(
    final UserGroupInformation ugi,
    final DelegationParam delegation,
    final UserParam username,
    final DoAsParam doAsUser,
    final String fullpath,
    final DeleteOpParam op,
    final RecursiveParam recursive
    ) throws IOException {
  final NameNode namenode = (NameNode)context.getAttribute("name.node");

  switch(op.getValue()) {
  case DELETE:
  {
    final boolean b = namenode.getRpcServer().delete(fullpath, recursive.getValue());
    final String js = JsonUtil.toJsonString("boolean", b);
    return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
  }
  default:
    throw new UnsupportedOperationException(op + " is not supported");
  }
}
 

import org.apache.hadoop.hdfs.web.JsonUtil; //导入方法依赖的package包/类
private Response delete(final UserGroupInformation ugi,
    final DelegationParam delegation, final UserParam username,
    final DoAsParam doAsUser, final String fullpath, final DeleteOpParam op,
    final RecursiveParam recursive) throws IOException {
  final NameNode namenode = (NameNode) context.getAttribute("name.node");

  switch (op.getValue()) {
    case DELETE: {
      final boolean b =
          namenode.getRpcServer().delete(fullpath, recursive.getValue());
      final String js = JsonUtil.toJsonString("boolean", b);
      return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
    }
    default:
      throw new UnsupportedOperationException(op + " is not supported");
  }
}
 

import org.apache.hadoop.hdfs.web.JsonUtil; //导入方法依赖的package包/类
private Response delete(
    final UserGroupInformation ugi,
    final DelegationParam delegation,
    final UserParam username,
    final DoAsParam doAsUser,
    final String fullpath,
    final DeleteOpParam op,
    final RecursiveParam recursive
    ) throws IOException {
  final NameNode namenode = (NameNode)context.getAttribute("name.node");

  switch(op.getValue()) {
  case DELETE:
  {
    final boolean b = getRPCServer(namenode).delete(fullpath, recursive.getValue());
    final String js = JsonUtil.toJsonString("boolean", b);
    return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
  }
  default:
    throw new UnsupportedOperationException(op + " is not supported");
  }
}
 

import org.apache.hadoop.hdfs.web.JsonUtil; //导入方法依赖的package包/类
private Response post(
    final UserGroupInformation ugi,
    final DelegationParam delegation,
    final UserParam username,
    final DoAsParam doAsUser,
    final String fullpath,
    final PostOpParam op,
    final ConcatSourcesParam concatSrcs,
    final BufferSizeParam bufferSize,
    final ExcludeDatanodesParam excludeDatanodes,
    final NewLengthParam newLength
    ) throws IOException, URISyntaxException {
  final NameNode namenode = (NameNode)context.getAttribute("name.node");
  final NamenodeProtocols np = getRPCServer(namenode);

  switch(op.getValue()) {
  case APPEND:
  {
    final URI uri = redirectURI(namenode, ugi, delegation, username,
        doAsUser, fullpath, op.getValue(), -1L, -1L,
        excludeDatanodes.getValue(), bufferSize);
    return Response.temporaryRedirect(uri).type(MediaType.APPLICATION_OCTET_STREAM).build();
  }
  case CONCAT:
  {
    np.concat(fullpath, concatSrcs.getAbsolutePaths());
    return Response.ok().build();
  }
  case TRUNCATE:
  {
    // We treat each rest request as a separate client.
    final boolean b = np.truncate(fullpath, newLength.getValue(), 
        "DFSClient_" + DFSUtil.getSecureRandom().nextLong());
    final String js = JsonUtil.toJsonString("boolean", b);
    return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
  }
  default:
    throw new UnsupportedOperationException(op + " is not supported");
  }
}
 

import org.apache.hadoop.hdfs.web.JsonUtil; //导入方法依赖的package包/类
private Response delete(
    final UserGroupInformation ugi,
    final DelegationParam delegation,
    final UserParam username,
    final DoAsParam doAsUser,
    final String fullpath,
    final DeleteOpParam op,
    final RecursiveParam recursive,
    final SnapshotNameParam snapshotName
    ) throws IOException {
  final NameNode namenode = (NameNode)context.getAttribute("name.node");
  final NamenodeProtocols np = getRPCServer(namenode);

  switch(op.getValue()) {
  case DELETE: {
    final boolean b = np.delete(fullpath, recursive.getValue());
    final String js = JsonUtil.toJsonString("boolean", b);
    return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
  }
  case DELETESNAPSHOT: {
    np.deleteSnapshot(fullpath, snapshotName.getValue());
    return Response.ok().type(MediaType.APPLICATION_OCTET_STREAM).build();
  }
  default:
    throw new UnsupportedOperationException(op + " is not supported");
  }
}
 

import org.apache.hadoop.hdfs.web.JsonUtil; //导入方法依赖的package包/类
/**
 * Return the JSON formatted XAttrs of the specified file.
 *
 * @param path
 *          a path specifies a file
 * @return JSON formatted XAttrs
 * @throws IOException
 *           if failed to serialize fileStatus to JSON.
 */
String getXAttrs(String path, List<String> names, String encoder)
        throws IOException {

  List<XAttr> xAttrs = getXAttrList(path);
  List<XAttr> filtered;
  if (names == null || names.size() == 0) {
    filtered = xAttrs;
  } else {
    filtered = Lists.newArrayListWithCapacity(names.size());
    for (String name : names) {
      XAttr search = XAttrHelper.buildXAttr(name);

      boolean found = false;
      for (XAttr aXAttr : xAttrs) {
        if (aXAttr.getNameSpace() == search.getNameSpace()
                && aXAttr.getName().equals(search.getName())) {

          filtered.add(aXAttr);
          found = true;
          break;
        }
      }

      if (!found) {
        throw new IOException(
                "At least one of the attributes provided was not found.");
      }
    }

  }
  return JsonUtil.toJsonString(filtered,
          new XAttrEncodingParam(encoder).getEncoding());
}
 

import org.apache.hadoop.hdfs.web.JsonUtil; //导入方法依赖的package包/类
/**
 * Return the JSON formatted ACL status of the specified file.
 * @param path a path specifies a file
 * @return JSON formatted AclStatus
 * @throws IOException if failed to serialize fileStatus to JSON.
 */
String getAclStatus(String path) throws IOException {
  PermissionStatus p = getPermissionStatus(path);
  List<AclEntry> aclEntryList = getAclEntryList(path);
  FsPermission permission = p.getPermission();
  AclStatus.Builder builder = new AclStatus.Builder();
  builder.owner(p.getUserName()).group(p.getGroupName())
      .addEntries(aclEntryList).setPermission(permission)
      .stickyBit(permission.getStickyBit());
  AclStatus aclStatus = builder.build();
  return JsonUtil.toJsonString(aclStatus);
}
 

import org.apache.hadoop.hdfs.web.JsonUtil; //导入方法依赖的package包/类
/**
 * Return the JSON formatted XAttrs of the specified file.
 *
 * @param path
 *          a path specifies a file
 * @return JSON formatted XAttrs
 * @throws IOException
 *           if failed to serialize fileStatus to JSON.
 */
String getXAttrs(String path, List<String> names, String encoder)
    throws IOException {

  List<XAttr> xAttrs = getXAttrList(path);
  List<XAttr> filtered;
  if (names == null || names.size() == 0) {
    filtered = xAttrs;
  } else {
    filtered = Lists.newArrayListWithCapacity(names.size());
    for (String name : names) {
      XAttr search = XAttrHelper.buildXAttr(name);

      boolean found = false;
      for (XAttr aXAttr : xAttrs) {
        if (aXAttr.getNameSpace() == search.getNameSpace()
            && aXAttr.getName().equals(search.getName())) {

          filtered.add(aXAttr);
          found = true;
          break;
        }
      }

      if (!found) {
        throw new IOException(
            "At least one of the attributes provided was not found.");
      }
    }

  }
  return JsonUtil.toJsonString(filtered,
      new XAttrEncodingParam(encoder).getEncoding());
}
 

import org.apache.hadoop.hdfs.web.JsonUtil; //导入方法依赖的package包/类
/**
 * Create a populated namespace for later testing. Save its contents to a data
 * structure and store its fsimage location. We only want to generate the
 * fsimage file once and use it for multiple tests.
 */
@BeforeClass
public static void createOriginalFSImage() throws IOException {
  MiniDFSCluster cluster = null;
  Configuration conf = new Configuration();

  try {
    cluster = new MiniDFSCluster.Builder(conf).build();
    cluster.waitActive();
    DistributedFileSystem hdfs = cluster.getFileSystem();
    // Create a name space with XAttributes
    Path dir = new Path("/dir1");
    hdfs.mkdirs(dir);
    hdfs.setXAttr(dir, "user.attr1", "value1".getBytes());
    hdfs.setXAttr(dir, "user.attr2", "value2".getBytes());
    // Write results to the fsimage file
    hdfs.setSafeMode(HdfsConstants.SafeModeAction.SAFEMODE_ENTER, false);
    hdfs.saveNamespace();

    List<XAttr> attributes = new ArrayList<XAttr>();
    attributes.add(XAttrHelper.buildXAttr("user.attr1", "value1".getBytes()));

    attr1JSon = JsonUtil.toJsonString(attributes, null);

    attributes.add(XAttrHelper.buildXAttr("user.attr2", "value2".getBytes()));

    // Determine the location of the fsimage file
    originalFsimage = FSImageTestUtil.findLatestImageFile(FSImageTestUtil
        .getFSImage(cluster.getNameNode()).getStorage().getStorageDir(0));
    if (originalFsimage == null) {
      throw new RuntimeException("Didn't generate or can't find fsimage");
    }
    LOG.debug("original FS image file is " + originalFsimage);
  } finally {
    if (cluster != null)
      cluster.shutdown();
  }
}
 

import org.apache.hadoop.hdfs.web.JsonUtil; //导入方法依赖的package包/类
@Override
public Response toResponse(Exception e) {
  if (LOG.isTraceEnabled()) {
    LOG.trace("GOT EXCEPITION", e);
  }

  //clear content type
  response.setContentType(null);

  //Convert exception
  if (e instanceof ParamException) {
    final ParamException paramexception = (ParamException)e;
    e = new IllegalArgumentException("Invalid value for webhdfs parameter \""
        + paramexception.getParameterName() + "\": "
        + e.getCause().getMessage(), e);
  }
  if (e instanceof ContainerException) {
    e = toCause(e);
  }
  if (e instanceof RemoteException) {
    e = ((RemoteException)e).unwrapRemoteException();
  }

  if (e instanceof SecurityException) {
    e = toCause(e);
  }
  
  //Map response status
  final Response.Status s;
  if (e instanceof SecurityException) {
    s = Response.Status.FORBIDDEN;
  } else if (e instanceof AuthorizationException) {
    s = Response.Status.FORBIDDEN;
  } else if (e instanceof FileNotFoundException) {
    s = Response.Status.NOT_FOUND;
  } else if (e instanceof IOException) {
    s = Response.Status.FORBIDDEN;
  } else if (e instanceof UnsupportedOperationException) {
    s = Response.Status.BAD_REQUEST;
  } else if (e instanceof IllegalArgumentException) {
    s = Response.Status.BAD_REQUEST;
  } else {
    LOG.warn("INTERNAL_SERVER_ERROR", e);
    s = Response.Status.INTERNAL_SERVER_ERROR;
  }
 
  final String js = JsonUtil.toJsonString(e);
  return Response.status(s).type(MediaType.APPLICATION_JSON).entity(js).build();
}
 

import org.apache.hadoop.hdfs.web.JsonUtil; //导入方法依赖的package包/类
private Response post(
    final UserGroupInformation ugi,
    final DelegationParam delegation,
    final UserParam username,
    final DoAsParam doAsUser,
    final String fullpath,
    final PostOpParam op,
    final ConcatSourcesParam concatSrcs,
    final BufferSizeParam bufferSize,
    final ExcludeDatanodesParam excludeDatanodes,
    final NewLengthParam newLength
    ) throws IOException, URISyntaxException {
  final NameNode namenode = (NameNode)context.getAttribute("name.node");
  final NamenodeProtocols np = getRPCServer(namenode);

  switch(op.getValue()) {
  case APPEND:
  {
    final URI uri = redirectURI(namenode, ugi, delegation, username,
        doAsUser, fullpath, op.getValue(), -1L, -1L,
        excludeDatanodes.getValue(), bufferSize);
    return Response.temporaryRedirect(uri).type(MediaType.APPLICATION_OCTET_STREAM).build();
  }
  case CONCAT:
  {
    np.concat(fullpath, concatSrcs.getAbsolutePaths());
    return Response.ok().build();
  }
  case TRUNCATE:
  {
    if (newLength.getValue() == null) {
      throw new IllegalArgumentException(
          "newLength parameter is Missing");
    }
    // We treat each rest request as a separate client.
    final boolean b = np.truncate(fullpath, newLength.getValue(), 
        "DFSClient_" + DFSUtil.getSecureRandom().nextLong());
    final String js = JsonUtil.toJsonString("boolean", b);
    return Response.ok(js).type(MediaType.APPLICATION_JSON).build();
  }
  default:
    throw new UnsupportedOperationException(op + " is not supported");
  }
}
 

import org.apache.hadoop.hdfs.web.JsonUtil; //导入方法依赖的package包/类
@Override
public Response toResponse(Exception e) {
  if (LOG.isTraceEnabled()) {
    LOG.trace("GOT EXCEPITION", e);
  }

  //clear content type
  response.setContentType(null);

  //Convert exception
  if (e instanceof ParamException) {
    final ParamException paramexception = (ParamException)e;
    e = new IllegalArgumentException("Invalid value for webhdfs parameter \""
        + paramexception.getParameterName() + "\": "
        + e.getCause().getMessage(), e);
  }
  if (e instanceof ContainerException) {
    e = toCause(e);
  }
  if (e instanceof RemoteException) {
    e = ((RemoteException)e).unwrapRemoteException();
  }

  //Map response status
  final Response.Status s;
  if (e instanceof SecurityException) {
    s = Response.Status.UNAUTHORIZED;
  } else if (e instanceof AuthorizationException) {
    s = Response.Status.UNAUTHORIZED;
  } else if (e instanceof FileNotFoundException) {
    s = Response.Status.NOT_FOUND;
  } else if (e instanceof IOException) {
    s = Response.Status.FORBIDDEN;
  } else if (e instanceof UnsupportedOperationException) {
    s = Response.Status.BAD_REQUEST;
  } else if (e instanceof IllegalArgumentException) {
    s = Response.Status.BAD_REQUEST;
  } else {
    LOG.warn("INTERNAL_SERVER_ERROR", e);
    s = Response.Status.INTERNAL_SERVER_ERROR;
  }
 
  final String js = JsonUtil.toJsonString(e);
  return Response.status(s).type(MediaType.APPLICATION_JSON).entity(js).build();
}
 

import org.apache.hadoop.hdfs.web.JsonUtil; //导入方法依赖的package包/类
@Override
public Response toResponse(Exception e) {
  if (LOG.isTraceEnabled()) {
    LOG.trace("GOT EXCEPITION", e);
  }

  //clear content type
  response.setContentType(null);

  //Convert exception
  if (e instanceof ParamException) {
    final ParamException paramexception = (ParamException) e;
    e = new IllegalArgumentException(
        "Invalid value for webhdfs parameter \"" +
            paramexception.getParameterName() + "\": " +
            e.getCause().getMessage(), e);
  }
  if (e instanceof ContainerException) {
    e = toCause(e);
  }
  if (e instanceof RemoteException) {
    e = ((RemoteException) e).unwrapRemoteException();
  }

  //Map response status
  final Response.Status s;
  if (e instanceof SecurityException) {
    s = Response.Status.UNAUTHORIZED;
  } else if (e instanceof AuthorizationException) {
    s = Response.Status.UNAUTHORIZED;
  } else if (e instanceof FileNotFoundException) {
    s = Response.Status.NOT_FOUND;
  } else if (e instanceof IOException) {
    s = Response.Status.FORBIDDEN;
  } else if (e instanceof UnsupportedOperationException) {
    s = Response.Status.BAD_REQUEST;
  } else if (e instanceof IllegalArgumentException) {
    s = Response.Status.BAD_REQUEST;
  } else {
    LOG.warn("INTERNAL_SERVER_ERROR", e);
    s = Response.Status.INTERNAL_SERVER_ERROR;
  }

  final String js = JsonUtil.toJsonString(e);
  return Response.status(s).type(MediaType.APPLICATION_JSON).entity(js)
      .build();
}