/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.rest;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.HttpHeaders;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriInfo;
import javax.ws.rs.core.Response.ResponseBuilder;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.hbase.HConstants;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.exceptions.TableNotFoundException;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.HTableInterface;
import org.apache.hadoop.hbase.client.HTablePool;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.rest.model.CellModel;
import org.apache.hadoop.hbase.rest.model.CellSetModel;
import org.apache.hadoop.hbase.rest.model.RowModel;
import org.apache.hadoop.hbase.util.Bytes;
@InterfaceAudience.Private
public class RowResource extends ResourceBase {
private static final Log LOG = LogFactory.getLog(RowResource.class);
static final String CHECK_PUT = "put";
static final String CHECK_DELETE = "delete";
TableResource tableResource;
RowSpec rowspec;
private String check = null;
/**
* Constructor
* @param tableResource
* @param rowspec
* @param versions
* @throws IOException
*/
public RowResource(TableResource tableResource, String rowspec,
String versions, String check) throws IOException {
super();
this.tableResource = tableResource;
this.rowspec = new RowSpec(rowspec);
if (versions != null) {
this.rowspec.setMaxVersions(Integer.valueOf(versions));
}
this.check = check;
}
@GET
@Produces({MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF,
MIMETYPE_PROTOBUF_IETF})
public Response get(final @Context UriInfo uriInfo) {
if (LOG.isDebugEnabled()) {
LOG.debug("GET " + uriInfo.getAbsolutePath());
}
servlet.getMetrics().incrementRequests(1);
try {
ResultGenerator generator =
ResultGenerator.fromRowSpec(tableResource.getName(), rowspec, null);
if (!generator.hasNext()) {
return Response.status(Response.Status.NOT_FOUND)
.type(MIMETYPE_TEXT).entity("Not found" + CRLF)
.build();
}
int count = 0;
CellSetModel model = new CellSetModel();
KeyValue value = generator.next();
byte[] rowKey = value.getRow();
RowModel rowModel = new RowModel(rowKey);
do {
if (!Bytes.equals(value.getRow(), rowKey)) {
model.addRow(rowModel);
rowKey = value.getRow();
rowModel = new RowModel(rowKey);
}
rowModel.addCell(new CellModel(value.getFamily(), value.getQualifier(),
value.getTimestamp(), value.getValue()));
if (++count > rowspec.getMaxValues()) {
break;
}
value = generator.next();
} while (value != null);
model.addRow(rowModel);
servlet.getMetrics().incrementSucessfulGetRequests(1);
return Response.ok(model).build();
} catch (RuntimeException e) {
servlet.getMetrics().incrementFailedPutRequests(1);
if (e.getCause() instanceof TableNotFoundException) {
return Response.status(Response.Status.NOT_FOUND)
.type(MIMETYPE_TEXT).entity("Not found" + CRLF)
.build();
}
return Response.status(Response.Status.BAD_REQUEST)
.type(MIMETYPE_TEXT).entity("Bad request" + CRLF)
.build();
} catch (Exception e) {
servlet.getMetrics().incrementFailedPutRequests(1);
return Response.status(Response.Status.SERVICE_UNAVAILABLE)
.type(MIMETYPE_TEXT).entity("Unavailable" + CRLF)
.build();
}
}
@GET
@Produces(MIMETYPE_BINARY)
public Response getBinary(final @Context UriInfo uriInfo) {
if (LOG.isDebugEnabled()) {
LOG.debug("GET " + uriInfo.getAbsolutePath() + " as "+ MIMETYPE_BINARY);
}
servlet.getMetrics().incrementRequests(1);
// doesn't make sense to use a non specific coordinate as this can only
// return a single cell
if (!rowspec.hasColumns() || rowspec.getColumns().length > 1) {
return Response.status(Response.Status.BAD_REQUEST)
.type(MIMETYPE_TEXT).entity("Bad request" + CRLF)
.build();
}
try {
ResultGenerator generator =
ResultGenerator.fromRowSpec(tableResource.getName(), rowspec, null);
if (!generator.hasNext()) {
return Response.status(Response.Status.NOT_FOUND)
.type(MIMETYPE_TEXT).entity("Not found" + CRLF)
.build();
}
KeyValue value = generator.next();
ResponseBuilder response = Response.ok(value.getValue());
response.header("X-Timestamp", value.getTimestamp());
servlet.getMetrics().incrementSucessfulGetRequests(1);
return response.build();
} catch (IOException e) {
servlet.getMetrics().incrementFailedGetRequests(1);
return Response.status(Response.Status.SERVICE_UNAVAILABLE)
.type(MIMETYPE_TEXT).entity("Unavailable" + CRLF)
.build();
}
}
Response update(final CellSetModel model, final boolean replace) {
servlet.getMetrics().incrementRequests(1);
if (servlet.isReadOnly()) {
return Response.status(Response.Status.FORBIDDEN)
.type(MIMETYPE_TEXT).entity("Forbidden" + CRLF)
.build();
}
if (CHECK_PUT.equalsIgnoreCase(check)) {
return checkAndPut(model);
} else if (CHECK_DELETE.equalsIgnoreCase(check)) {
return checkAndDelete(model);
} else if (check != null && check.length() > 0) {
LOG.warn("Unknown check value: " + check + ", ignored");
}
HTablePool pool = servlet.getTablePool();
HTableInterface table = null;
try {
List<RowModel> rows = model.getRows();
List<Put> puts = new ArrayList<Put>();
for (RowModel row: rows) {
byte[] key = row.getKey();
if (key == null) {
key = rowspec.getRow();
}
if (key == null) {
return Response.status(Response.Status.BAD_REQUEST)
.type(MIMETYPE_TEXT).entity("Bad request" + CRLF)
.build();
}
Put put = new Put(key);
int i = 0;
for (CellModel cell: row.getCells()) {
byte[] col = cell.getColumn();
if (col == null) try {
col = rowspec.getColumns()[i++];
} catch (ArrayIndexOutOfBoundsException e) {
col = null;
}
if (col == null) {
return Response.status(Response.Status.BAD_REQUEST)
.type(MIMETYPE_TEXT).entity("Bad request" + CRLF)
.build();
}
byte [][] parts = KeyValue.parseColumn(col);
if (parts.length == 2 && parts[1].length > 0) {
put.add(parts[0], parts[1], cell.getTimestamp(), cell.getValue());
} else {
put.add(parts[0], null, cell.getTimestamp(), cell.getValue());
}
}
puts.add(put);
if (LOG.isDebugEnabled()) {
LOG.debug("PUT " + put.toString());
}
}
table = pool.getTable(tableResource.getName());
table.put(puts);
table.flushCommits();
ResponseBuilder response = Response.ok();
servlet.getMetrics().incrementSucessfulPutRequests(1);
return response.build();
} catch (IOException e) {
servlet.getMetrics().incrementFailedPutRequests(1);
return Response.status(Response.Status.SERVICE_UNAVAILABLE)
.type(MIMETYPE_TEXT).entity("Unavailable" + CRLF)
.build();
} finally {
if (table != null) try {
table.close();
} catch (IOException ioe) {
LOG.debug("Exception received while closing the table", ioe);
}
}
}
// This currently supports only update of one row at a time.
Response updateBinary(final byte[] message, final HttpHeaders headers,
final boolean replace) {
servlet.getMetrics().incrementRequests(1);
if (servlet.isReadOnly()) {
return Response.status(Response.Status.FORBIDDEN)
.type(MIMETYPE_TEXT).entity("Forbidden" + CRLF)
.build();
}
HTablePool pool = servlet.getTablePool();
HTableInterface table = null;
try {
byte[] row = rowspec.getRow();
byte[][] columns = rowspec.getColumns();
byte[] column = null;
if (columns != null) {
column = columns[0];
}
long timestamp = HConstants.LATEST_TIMESTAMP;
List<String> vals = headers.getRequestHeader("X-Row");
if (vals != null && !vals.isEmpty()) {
row = Bytes.toBytes(vals.get(0));
}
vals = headers.getRequestHeader("X-Column");
if (vals != null && !vals.isEmpty()) {
column = Bytes.toBytes(vals.get(0));
}
vals = headers.getRequestHeader("X-Timestamp");
if (vals != null && !vals.isEmpty()) {
timestamp = Long.valueOf(vals.get(0));
}
if (column == null) {
return Response.status(Response.Status.BAD_REQUEST)
.type(MIMETYPE_TEXT).entity("Bad request" + CRLF)
.build();
}
Put put = new Put(row);
byte parts[][] = KeyValue.parseColumn(column);
if (parts.length == 2 && parts[1].length > 0) {
put.add(parts[0], parts[1], timestamp, message);
} else {
put.add(parts[0], null, timestamp, message);
}
table = pool.getTable(tableResource.getName());
table.put(put);
if (LOG.isDebugEnabled()) {
LOG.debug("PUT " + put.toString());
}
servlet.getMetrics().incrementSucessfulPutRequests(1);
return Response.ok().build();
} catch (IOException e) {
servlet.getMetrics().incrementFailedPutRequests(1);
return Response.status(Response.Status.SERVICE_UNAVAILABLE)
.type(MIMETYPE_TEXT).entity("Unavailable" + CRLF)
.build();
} finally {
if (table != null) try {
table.close();
} catch (IOException ioe) { }
}
}
@PUT
@Consumes({MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF,
MIMETYPE_PROTOBUF_IETF})
public Response put(final CellSetModel model,
final @Context UriInfo uriInfo) {
if (LOG.isDebugEnabled()) {
LOG.debug("PUT " + uriInfo.getAbsolutePath()
+ " " + uriInfo.getQueryParameters());
}
return update(model, true);
}
@PUT
@Consumes(MIMETYPE_BINARY)
public Response putBinary(final byte[] message,
final @Context UriInfo uriInfo, final @Context HttpHeaders headers) {
if (LOG.isDebugEnabled()) {
LOG.debug("PUT " + uriInfo.getAbsolutePath() + " as "+ MIMETYPE_BINARY);
}
return updateBinary(message, headers, true);
}
@POST
@Consumes({MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF,
MIMETYPE_PROTOBUF_IETF})
public Response post(final CellSetModel model,
final @Context UriInfo uriInfo) {
if (LOG.isDebugEnabled()) {
LOG.debug("POST " + uriInfo.getAbsolutePath()
+ " " + uriInfo.getQueryParameters());
}
return update(model, false);
}
@POST
@Consumes(MIMETYPE_BINARY)
public Response postBinary(final byte[] message,
final @Context UriInfo uriInfo, final @Context HttpHeaders headers) {
if (LOG.isDebugEnabled()) {
LOG.debug("POST " + uriInfo.getAbsolutePath() + " as "+MIMETYPE_BINARY);
}
return updateBinary(message, headers, false);
}
@DELETE
public Response delete(final @Context UriInfo uriInfo) {
if (LOG.isDebugEnabled()) {
LOG.debug("DELETE " + uriInfo.getAbsolutePath());
}
servlet.getMetrics().incrementRequests(1);
if (servlet.isReadOnly()) {
return Response.status(Response.Status.FORBIDDEN)
.type(MIMETYPE_TEXT).entity("Forbidden" + CRLF)
.build();
}
Delete delete = null;
if (rowspec.hasTimestamp())
delete = new Delete(rowspec.getRow(), rowspec.getTimestamp());
else
delete = new Delete(rowspec.getRow());
for (byte[] column: rowspec.getColumns()) {
byte[][] split = KeyValue.parseColumn(column);
if (rowspec.hasTimestamp()) {
if (split.length == 2 && split[1].length != 0) {
delete.deleteColumns(split[0], split[1], rowspec.getTimestamp());
} else {
delete.deleteFamily(split[0], rowspec.getTimestamp());
}
} else {
if (split.length == 2 && split[1].length != 0) {
delete.deleteColumns(split[0], split[1]);
} else {
delete.deleteFamily(split[0]);
}
}
}
HTablePool pool = servlet.getTablePool();
HTableInterface table = null;
try {
table = pool.getTable(tableResource.getName());
table.delete(delete);
servlet.getMetrics().incrementSucessfulDeleteRequests(1);
if (LOG.isDebugEnabled()) {
LOG.debug("DELETE " + delete.toString());
}
} catch (IOException e) {
servlet.getMetrics().incrementFailedDeleteRequests(1);
return Response.status(Response.Status.SERVICE_UNAVAILABLE)
.type(MIMETYPE_TEXT).entity("Unavailable" + CRLF)
.build();
} finally {
if (table != null) try {
table.close();
} catch (IOException ioe) { }
}
return Response.ok().build();
}
/**
* Validates the input request parameters, parses columns from CellSetModel,
* and invokes checkAndPut on HTable.
*
* @param model instance of CellSetModel
* @return Response 200 OK, 304 Not modified, 400 Bad request
*/
Response checkAndPut(final CellSetModel model) {
HTablePool pool = servlet.getTablePool();
HTableInterface table = null;
try {
if (model.getRows().size() != 1) {
return Response.status(Response.Status.BAD_REQUEST)
.type(MIMETYPE_TEXT).entity("Bad request" + CRLF)
.build();
}
RowModel rowModel = model.getRows().get(0);
byte[] key = rowModel.getKey();
if (key == null) {
key = rowspec.getRow();
}
List<CellModel> cellModels = rowModel.getCells();
int cellModelCount = cellModels.size();
if (key == null || cellModelCount <= 1) {
return Response.status(Response.Status.BAD_REQUEST)
.type(MIMETYPE_TEXT).entity("Bad request" + CRLF)
.build();
}
Put put = new Put(key);
CellModel valueToCheckCell = cellModels.get(cellModelCount - 1);
byte[] valueToCheckColumn = valueToCheckCell.getColumn();
byte[][] valueToPutParts = KeyValue.parseColumn(valueToCheckColumn);
if (valueToPutParts.length == 2 && valueToPutParts[1].length > 0) {
CellModel valueToPutCell = null;
for (int i = 0, n = cellModelCount - 1; i < n ; i++) {
if(Bytes.equals(cellModels.get(i).getColumn(),
valueToCheckCell.getColumn())) {
valueToPutCell = cellModels.get(i);
break;
}
}
if (valueToPutCell != null) {
put.add(valueToPutParts[0], valueToPutParts[1], valueToPutCell
.getTimestamp(), valueToPutCell.getValue());
} else {
return Response.status(Response.Status.BAD_REQUEST)
.type(MIMETYPE_TEXT).entity("Bad request" + CRLF)
.build();
}
} else {
return Response.status(Response.Status.BAD_REQUEST)
.type(MIMETYPE_TEXT).entity("Bad request" + CRLF)
.build();
}
table = pool.getTable(this.tableResource.getName());
boolean retValue = table.checkAndPut(key, valueToPutParts[0],
valueToPutParts[1], valueToCheckCell.getValue(), put);
if (LOG.isDebugEnabled()) {
LOG.debug("CHECK-AND-PUT " + put.toString() + ", returns " + retValue);
}
table.flushCommits();
ResponseBuilder response = Response.ok();
if (!retValue) {
response = Response.status(304);
}
return response.build();
} catch (IOException e) {
return Response.status(Response.Status.SERVICE_UNAVAILABLE)
.type(MIMETYPE_TEXT).entity("Unavailable" + CRLF)
.build();
} finally {
if (table != null) try {
table.close();
} catch (IOException ioe) { }
}
}
/**
* Validates the input request parameters, parses columns from CellSetModel,
* and invokes checkAndDelete on HTable.
*
* @param model instance of CellSetModel
* @return Response 200 OK, 304 Not modified, 400 Bad request
*/
Response checkAndDelete(final CellSetModel model) {
HTablePool pool = servlet.getTablePool();
HTableInterface table = null;
Delete delete = null;
try {
if (model.getRows().size() != 1) {
return Response.status(Response.Status.BAD_REQUEST)
.type(MIMETYPE_TEXT).entity("Bad request" + CRLF)
.build();
}
RowModel rowModel = model.getRows().get(0);
byte[] key = rowModel.getKey();
if (key == null) {
key = rowspec.getRow();
}
if (key == null) {
return Response.status(Response.Status.BAD_REQUEST)
.type(MIMETYPE_TEXT).entity("Bad request" + CRLF)
.build();
}
delete = new Delete(key);
CellModel valueToDeleteCell = rowModel.getCells().get(0);
byte[] valueToDeleteColumn = valueToDeleteCell.getColumn();
if (valueToDeleteColumn == null) {
try {
valueToDeleteColumn = rowspec.getColumns()[0];
} catch (final ArrayIndexOutOfBoundsException e) {
return Response.status(Response.Status.BAD_REQUEST)
.type(MIMETYPE_TEXT).entity("Bad request" + CRLF)
.build();
}
}
byte[][] parts = KeyValue.parseColumn(valueToDeleteColumn);
if (parts.length == 2 && parts[1].length > 0) {
delete.deleteColumns(parts[0], parts[1]);
} else {
return Response.status(Response.Status.BAD_REQUEST)
.type(MIMETYPE_TEXT).entity("Bad request" + CRLF)
.build();
}
table = pool.getTable(tableResource.getName());
boolean retValue = table.checkAndDelete(key, parts[0], parts[1],
valueToDeleteCell.getValue(), delete);
if (LOG.isDebugEnabled()) {
LOG.debug("CHECK-AND-DELETE " + delete.toString() + ", returns "
+ retValue);
}
table.flushCommits();
ResponseBuilder response = Response.ok();
if (!retValue) {
response = Response.status(304);
}
return response.build();
} catch (IOException e) {
return Response.status(Response.Status.SERVICE_UNAVAILABLE)
.type(MIMETYPE_TEXT).entity("Unavailable" + CRLF)
.build();
} finally {
if (table != null) try {
table.close();
} catch (IOException ioe) {
LOG.debug("Exception received while closing the table", ioe);
}
}
}
}