/**
* 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 demo.jaxrs.tracing.server;
import java.io.IOException;
import javax.json.Json;
import javax.json.JsonArray;
import javax.json.JsonArrayBuilder;
import javax.json.JsonObject;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.trace.SpanReceiverHost;
import org.apache.hadoop.hbase.util.Bytes;
public class CatalogStore {
@SuppressWarnings("unused")
private final SpanReceiverHost spanReceiverHost;
private final Connection connection;
private final String tableName;
public CatalogStore(final Configuration configuration, final String tableName) throws IOException {
this.connection = ConnectionFactory.createConnection(configuration);
this.spanReceiverHost = SpanReceiverHost.getInstance(configuration);
this.tableName = tableName;
}
public boolean remove(final String key) throws IOException {
try (final Table table = connection.getTable(TableName.valueOf(tableName))) {
if (get(key) != null) {
final Delete delete = new Delete(Bytes.toBytes(key));
table.delete(delete);
return true;
}
}
return false;
}
public JsonObject get(final String key) throws IOException {
try (final Table table = connection.getTable(TableName.valueOf(tableName))) {
final Get get = new Get(Bytes.toBytes(key));
final Result result = table.get(get);
if (!result.isEmpty()) {
final Cell cell = result.getColumnLatestCell(Bytes.toBytes("c"), Bytes.toBytes("title"));
return Json.createObjectBuilder()
.add("id", Bytes.toString(CellUtil.cloneRow(cell)))
.add("title", Bytes.toString(CellUtil.cloneValue(cell)))
.build();
}
}
return null;
}
public void put(final String key, final String title) throws IOException {
try (final Table table = connection.getTable(TableName.valueOf(tableName))) {
final Put put = new Put(Bytes.toBytes(key));
put.addColumn(Bytes.toBytes("c"), Bytes.toBytes("title"), Bytes.toBytes(title));
table.put(put);
}
}
public JsonArray scan() throws IOException {
final JsonArrayBuilder builder = Json.createArrayBuilder();
try (final Table table = connection.getTable(TableName.valueOf(tableName))) {
final Scan scan = new Scan();
final ResultScanner results = table.getScanner(scan);
for (final Result result: results) {
final Cell cell = result.getColumnLatestCell(Bytes.toBytes("c"), Bytes.toBytes("title"));
builder.add(Json.createObjectBuilder()
.add("id", Bytes.toString(CellUtil.cloneRow(cell)))
.add("title", Bytes.toString(CellUtil.cloneValue(cell)))
);
}
}
return builder.build();
}
}