org.apache.hadoop.hbase.rest.TableResource Maven / Gradle / Ivy
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*
* 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.List;
import javax.ws.rs.DefaultValue;
import javax.ws.rs.Encoded;
import javax.ws.rs.HeaderParam;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.UriInfo;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.classification.InterfaceAudience;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.filter.Filter;
import org.apache.hadoop.hbase.filter.FilterList;
import org.apache.hadoop.hbase.filter.ParseFilter;
import org.apache.hadoop.hbase.filter.PrefixFilter;
import org.apache.hadoop.hbase.util.Bytes;
@InterfaceAudience.Private
public class TableResource extends ResourceBase {
String table;
private static final Log LOG = LogFactory.getLog(TableResource.class);
/**
* Constructor
* @param table
* @throws IOException
*/
public TableResource(String table) throws IOException {
super();
this.table = table;
}
/** @return the table name */
String getName() {
return table;
}
/**
* @return true if the table exists
* @throws IOException
*/
boolean exists() throws IOException {
return servlet.getAdmin().tableExists(TableName.valueOf(table));
}
@Path("exists")
public ExistsResource getExistsResource() throws IOException {
return new ExistsResource(this);
}
@Path("regions")
public RegionsResource getRegionsResource() throws IOException {
return new RegionsResource(this);
}
@Path("scanner")
public ScannerResource getScannerResource() throws IOException {
return new ScannerResource(this);
}
@Path("schema")
public SchemaResource getSchemaResource() throws IOException {
return new SchemaResource(this);
}
@Path("multiget")
public MultiRowResource getMultipleRowResource(
final @QueryParam("v") String versions) throws IOException {
return new MultiRowResource(this, versions);
}
@Path("{rowspec: [^*]+}")
public RowResource getRowResource(
// We need the @Encoded decorator so Jersey won't urldecode before
// the RowSpec constructor has a chance to parse
final @PathParam("rowspec") @Encoded String rowspec,
final @QueryParam("v") String versions,
final @QueryParam("check") String check) throws IOException {
return new RowResource(this, rowspec, versions, check);
}
@Path("{suffixglobbingspec: .*\\*/.+}")
public RowResource getRowResourceWithSuffixGlobbing(
// We need the @Encoded decorator so Jersey won't urldecode before
// the RowSpec constructor has a chance to parse
final @PathParam("suffixglobbingspec") @Encoded String suffixglobbingspec,
final @QueryParam("v") String versions,
final @QueryParam("check") String check) throws IOException {
return new RowResource(this, suffixglobbingspec, versions, check);
}
@Path("{scanspec: .*[*]$}")
public TableScanResource getScanResource(
final @Context UriInfo uriInfo,
final @PathParam("scanspec") String scanSpec,
final @HeaderParam("Accept") String contentType,
@DefaultValue(Integer.MAX_VALUE + "")
@QueryParam(Constants.SCAN_LIMIT) int userRequestedLimit,
@DefaultValue("") @QueryParam(Constants.SCAN_START_ROW) String startRow,
@DefaultValue("") @QueryParam(Constants.SCAN_END_ROW) String endRow,
@DefaultValue("") @QueryParam(Constants.SCAN_COLUMN) List column,
@DefaultValue("1") @QueryParam(Constants.SCAN_MAX_VERSIONS) int maxVersions,
@DefaultValue("-1") @QueryParam(Constants.SCAN_BATCH_SIZE) int batchSize,
@DefaultValue("0") @QueryParam(Constants.SCAN_START_TIME) long startTime,
@DefaultValue(Long.MAX_VALUE + "") @QueryParam(Constants.SCAN_END_TIME) long endTime,
@DefaultValue("true") @QueryParam(Constants.SCAN_BATCH_SIZE) boolean cacheBlocks,
@DefaultValue("") @QueryParam(Constants.SCAN_FILTER) String filters) {
try {
Filter filter = null;
Scan tableScan = new Scan();
if (scanSpec.indexOf('*') > 0) {
String prefix = scanSpec.substring(0, scanSpec.indexOf('*'));
byte[] prefixBytes = Bytes.toBytes(prefix);
filter = new PrefixFilter(Bytes.toBytes(prefix));
if (startRow.isEmpty()) {
tableScan.setStartRow(prefixBytes);
}
}
LOG.debug("Query parameters : Table Name = > " + this.table + " Start Row => " + startRow
+ " End Row => " + endRow + " Columns => " + column + " Start Time => " + startTime
+ " End Time => " + endTime + " Cache Blocks => " + cacheBlocks + " Max Versions => "
+ maxVersions + " Batch Size => " + batchSize);
Table hTable = RESTServlet.getInstance().getTable(this.table);
tableScan.setBatch(batchSize);
tableScan.setMaxVersions(maxVersions);
tableScan.setTimeRange(startTime, endTime);
if (!startRow.isEmpty()) {
tableScan.setStartRow(Bytes.toBytes(startRow));
}
tableScan.setStopRow(Bytes.toBytes(endRow));
for (String csplit : column) {
String[] familysplit = csplit.trim().split(":");
if (familysplit.length == 2) {
if (familysplit[1].length() > 0) {
LOG.debug("Scan family and column : " + familysplit[0] + " " + familysplit[1]);
tableScan.addColumn(Bytes.toBytes(familysplit[0]), Bytes.toBytes(familysplit[1]));
} else {
tableScan.addFamily(Bytes.toBytes(familysplit[0]));
LOG.debug("Scan family : " + familysplit[0] + " and empty qualifier.");
tableScan.addColumn(Bytes.toBytes(familysplit[0]), null);
}
} else if (StringUtils.isNotEmpty(familysplit[0])){
LOG.debug("Scan family : " + familysplit[0]);
tableScan.addFamily(Bytes.toBytes(familysplit[0]));
}
}
FilterList filterList = null;
if (StringUtils.isNotEmpty(filters)) {
ParseFilter pf = new ParseFilter();
Filter filterParam = pf.parseFilterString(filters);
if (filter != null) {
filterList = new FilterList(filter, filterParam);
}
else {
filter = filterParam;
}
}
if (filterList != null) {
tableScan.setFilter(filterList);
} else if (filter != null) {
tableScan.setFilter(filter);
}
int fetchSize = this.servlet.getConfiguration().getInt(Constants.SCAN_FETCH_SIZE, 10);
tableScan.setCaching(fetchSize);
return new TableScanResource(hTable.getScanner(tableScan), userRequestedLimit);
} catch (Exception exp) {
servlet.getMetrics().incrementFailedScanRequests(1);
processException(exp);
LOG.warn(exp);
return null;
}
}
}
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