/*
* Copyright 2010 The Apache Software Foundation
*
* 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.stargate;
import java.io.IOException;
import java.net.URLDecoder;
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.WebApplicationException;
import javax.ws.rs.core.CacheControl;
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.hbase.HConstants;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.HTable;
import org.apache.hadoop.hbase.client.HTablePool;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.stargate.User;
import org.apache.hadoop.hbase.stargate.model.CellModel;
import org.apache.hadoop.hbase.stargate.model.CellSetModel;
import org.apache.hadoop.hbase.stargate.model.RowModel;
import org.apache.hadoop.hbase.util.Bytes;
public class RowResource implements Constants {
private static final Log LOG = LogFactory.getLog(RowResource.class);
User user;
String tableName;
String actualTableName;
RowSpec rowspec;
CacheControl cacheControl;
RESTServlet servlet;
public RowResource(User user, String table, String rowspec, String versions)
throws IOException {
this.user = user;
if (user != null) {
this.actualTableName =
!user.isAdmin() ? user.getName() + "." + table : table;
} else {
this.actualTableName = table;
}
this.tableName = table;
this.rowspec = new RowSpec(URLDecoder.decode(rowspec,
HConstants.UTF8_ENCODING));
if (versions != null) {
this.rowspec.setMaxVersions(Integer.valueOf(versions));
}
this.servlet = RESTServlet.getInstance();
cacheControl = new CacheControl();
cacheControl.setMaxAge(servlet.getMaxAge(actualTableName));
cacheControl.setNoTransform(false);
}
@GET
@Produces({MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF})
public Response get(final @Context UriInfo uriInfo) throws IOException {
if (LOG.isDebugEnabled()) {
LOG.debug("GET " + uriInfo.getAbsolutePath());
}
if (!servlet.userRequestLimit(user, 1)) {
return Response.status(509).build();
}
servlet.getMetrics().incrementRequests(1);
try {
ResultGenerator generator =
ResultGenerator.fromRowSpec(actualTableName, rowspec, null);
if (!generator.hasNext()) {
throw new WebApplicationException(Response.Status.NOT_FOUND);
}
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.getColumn(), value.getTimestamp(),
value.getValue()));
if (++count > rowspec.getMaxValues()) {
break;
}
value = generator.next();
} while (value != null);
model.addRow(rowModel);
ResponseBuilder response = Response.ok(model);
response.cacheControl(cacheControl);
return response.build();
} catch (IOException e) {
throw new WebApplicationException(e,
Response.Status.SERVICE_UNAVAILABLE);
}
}
@GET
@Produces(MIMETYPE_BINARY)
public Response getBinary(final @Context UriInfo uriInfo)
throws IOException {
if (LOG.isDebugEnabled()) {
LOG.debug("GET " + uriInfo.getAbsolutePath() + " as "+ MIMETYPE_BINARY);
}
if (!servlet.userRequestLimit(user, 1)) {
return Response.status(509).build();
}
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) {
throw new WebApplicationException(Response.Status.BAD_REQUEST);
}
try {
ResultGenerator generator =
ResultGenerator.fromRowSpec(actualTableName, rowspec, null);
if (!generator.hasNext()) {
throw new WebApplicationException(Response.Status.NOT_FOUND);
}
KeyValue value = generator.next();
ResponseBuilder response = Response.ok(value.getValue());
response.cacheControl(cacheControl);
response.header("X-Timestamp", value.getTimestamp());
return response.build();
} catch (IOException e) {
throw new WebApplicationException(e,
Response.Status.SERVICE_UNAVAILABLE);
}
}
Response update(final CellSetModel model, final boolean replace) {
HTablePool pool = servlet.getTablePool();
HTable table = null;
try {
List<RowModel> rows = model.getRows();
// the user request limit is a transaction limit, so we need to
// account for updates by row
if (user != null && !servlet.userRequestLimit(user, rows.size())) {
throw new WebApplicationException(Response.status(509).build());
}
table = pool.getTable(actualTableName);
table.setAutoFlush(false);
for (RowModel row: rows) {
byte[] key = row.getKey();
Put put = new Put(key);
for (CellModel cell: row.getCells()) {
byte [][] parts = KeyValue.parseColumn(cell.getColumn());
put.add(parts[0], parts[1], cell.getTimestamp(), cell.getValue());
}
table.put(put);
if (LOG.isDebugEnabled()) {
LOG.debug("PUT " + put.toString());
}
}
table.setAutoFlush(true);
table.flushCommits();
ResponseBuilder response = Response.ok();
return response.build();
} catch (IOException e) {
throw new WebApplicationException(e,
Response.Status.SERVICE_UNAVAILABLE);
} finally {
if (table != null) {
pool.putTable(table);
}
}
}
// This currently supports only update of one row at a time.
Response updateBinary(final byte[] message, final HttpHeaders headers,
final boolean replace) {
HTablePool pool = servlet.getTablePool();
HTable 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) {
throw new WebApplicationException(Response.Status.BAD_REQUEST);
}
Put put = new Put(row);
byte parts[][] = KeyValue.parseColumn(column);
put.add(parts[0], parts[1], timestamp, message);
table = pool.getTable(actualTableName);
table.put(put);
if (LOG.isDebugEnabled()) {
LOG.debug("PUT " + put.toString());
}
return Response.ok().build();
} catch (IOException e) {
throw new WebApplicationException(e,
Response.Status.SERVICE_UNAVAILABLE);
} finally {
if (table != null) {
pool.putTable(table);
}
}
}
@PUT
@Consumes({MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF})
public Response put(final CellSetModel model,
final @Context UriInfo uriInfo) throws IOException {
if (LOG.isDebugEnabled()) {
LOG.debug("PUT " + uriInfo.getAbsolutePath());
}
if (!servlet.userRequestLimit(user, 1)) {
return Response.status(509).build();
}
servlet.getMetrics().incrementRequests(1);
return update(model, true);
}
@PUT
@Consumes(MIMETYPE_BINARY)
public Response putBinary(final byte[] message,
final @Context UriInfo uriInfo, final @Context HttpHeaders headers)
throws IOException
{
if (LOG.isDebugEnabled()) {
LOG.debug("PUT " + uriInfo.getAbsolutePath() + " as "+ MIMETYPE_BINARY);
}
if (!servlet.userRequestLimit(user, 1)) {
return Response.status(509).build();
}
servlet.getMetrics().incrementRequests(1);
return updateBinary(message, headers, true);
}
@POST
@Consumes({MIMETYPE_XML, MIMETYPE_JSON, MIMETYPE_PROTOBUF})
public Response post(final CellSetModel model,
final @Context UriInfo uriInfo) throws IOException {
if (LOG.isDebugEnabled()) {
LOG.debug("POST " + uriInfo.getAbsolutePath());
}
if (!servlet.userRequestLimit(user, 1)) {
return Response.status(509).build();
}
servlet.getMetrics().incrementRequests(1);
return update(model, false);
}
@POST
@Consumes(MIMETYPE_BINARY)
public Response postBinary(final byte[] message,
final @Context UriInfo uriInfo, final @Context HttpHeaders headers)
throws IOException {
if (LOG.isDebugEnabled()) {
LOG.debug("POST " + uriInfo.getAbsolutePath() + " as "+MIMETYPE_BINARY);
}
if (!servlet.userRequestLimit(user, 1)) {
return Response.status(509).build();
}
servlet.getMetrics().incrementRequests(1);
return updateBinary(message, headers, false);
}
@DELETE
public Response delete(final @Context UriInfo uriInfo) throws IOException {
if (LOG.isDebugEnabled()) {
LOG.debug("DELETE " + uriInfo.getAbsolutePath());
}
if (!servlet.userRequestLimit(user, 1)) {
return Response.status(509).build();
}
servlet.getMetrics().incrementRequests(1);
Delete delete = null;
if (rowspec.hasTimestamp())
delete = new Delete(rowspec.getRow(), rowspec.getTimestamp(), null);
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();
HTable table = null;
try {
table = pool.getTable(actualTableName);
table.delete(delete);
if (LOG.isDebugEnabled()) {
LOG.debug("DELETE " + delete.toString());
}
} catch (IOException e) {
throw new WebApplicationException(e,
Response.Status.SERVICE_UNAVAILABLE);
} finally {
if (table != null) {
pool.putTable(table);
}
}
return Response.ok().build();
}
}