/**
* 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.cassandra.client;
import java.io.IOException;
import java.net.InetAddress;
import java.nio.ByteBuffer;
import java.util.Collection;
import org.apache.cassandra.config.DatabaseDescriptor;
import org.apache.cassandra.hadoop.ConfigHelper;
import org.apache.cassandra.thrift.Cassandra;
import org.apache.cassandra.thrift.Column;
import org.apache.cassandra.thrift.ColumnParent;
import org.apache.cassandra.thrift.ColumnPath;
import org.apache.cassandra.thrift.ConsistencyLevel;
import org.apache.cassandra.utils.ByteBufferUtil;
import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.conf.Configuration;
import org.apache.thrift.protocol.TBinaryProtocol;
import org.apache.thrift.transport.TFramedTransport;
import org.apache.thrift.transport.TSocket;
/**
* Sample code that uses RingCache in the client.
*/
public class TestRingCache
{
private RingCache ringCache;
private Cassandra.Client thriftClient;
private Configuration conf;
public TestRingCache(String keyspace) throws IOException
{
ConfigHelper.setOutputColumnFamily(conf, keyspace, "Standard1");
ringCache = new RingCache(conf);
}
private void setup(String server, int port) throws Exception
{
/* Establish a thrift connection to the cassandra instance */
TSocket socket = new TSocket(server, port);
System.out.println(" connected to " + server + ":" + port + ".");
TBinaryProtocol binaryProtocol = new TBinaryProtocol(new TFramedTransport(socket));
Cassandra.Client cassandraClient = new Cassandra.Client(binaryProtocol);
socket.open();
thriftClient = cassandraClient;
String seed = DatabaseDescriptor.getSeeds().iterator().next().getHostAddress();
conf = new Configuration();
ConfigHelper.setPartitioner(conf, DatabaseDescriptor.getPartitioner().getClass().getName());
ConfigHelper.setInitialAddress(conf, seed);
ConfigHelper.setRpcPort(conf, Integer.toString(DatabaseDescriptor.getRpcPort()));
}
/**
* usage: java -cp <configpath> org.apache.cassandra.client.TestRingCache [keyspace row-id-prefix row-id-int]
* to test a single keyspace/row, use the parameters. row-id-prefix and row-id-int are appended together to form a
* single row id. If you supply now parameters, 'Keyspace1' is assumed and will check 9 rows ('row1' through 'row9').
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Throwable
{
int minRow;
int maxRow;
String rowPrefix, keyspace = "Keyspace1";
if (args.length > 0)
{
keyspace = args[0];
rowPrefix = args[1];
minRow = Integer.parseInt(args[2]);
maxRow = minRow + 1;
}
else
{
minRow = 1;
maxRow = 10;
rowPrefix = "row";
}
TestRingCache tester = new TestRingCache(keyspace);
for (int nRows = minRow; nRows < maxRow; nRows++)
{
ByteBuffer row = ByteBufferUtil.bytes((rowPrefix + nRows));
ColumnPath col = new ColumnPath("Standard1").setSuper_column((ByteBuffer)null).setColumn("col1".getBytes());
ColumnParent parent = new ColumnParent("Standard1").setSuper_column((ByteBuffer)null);
Collection<InetAddress> endpoints = tester.ringCache.getEndpoint(row);
InetAddress firstEndpoint = endpoints.iterator().next();
System.out.printf("hosts with key %s : %s; choose %s%n",
new String(row.array()), StringUtils.join(endpoints, ","), firstEndpoint);
// now, read the row back directly from the host owning the row locally
tester.setup(firstEndpoint.getHostAddress(), DatabaseDescriptor.getRpcPort());
tester.thriftClient.set_keyspace(keyspace);
tester.thriftClient.insert(row, parent, new Column(ByteBufferUtil.bytes("col1")).setValue(ByteBufferUtil.bytes("val1")).setTimestamp(1), ConsistencyLevel.ONE);
Column column = tester.thriftClient.get(row, col, ConsistencyLevel.ONE).column;
System.out.println("read row " + new String(row.array()) + " " + new String(column.name.array()) + ":" + new String(column.value.array()) + ":" + column.timestamp);
}
System.exit(1);
}
}