/** * 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.net.InetAddress; import java.util.List; import org.apache.cassandra.thrift.Cassandra; import org.apache.cassandra.thrift.Column; import org.apache.cassandra.thrift.ColumnPath; import org.apache.cassandra.thrift.ConsistencyLevel; import static org.apache.cassandra.thrift.ThriftGlue.createColumnPath; import org.apache.cassandra.config.DatabaseDescriptor; import org.apache.thrift.protocol.TBinaryProtocol; import org.apache.thrift.transport.TSocket; import org.apache.thrift.transport.TTransport; /** * Sample code that uses RingCache in the client. */ public class TestRingCache { private static RingCache ringCache; private static Cassandra.Client thriftClient; static { ringCache = new RingCache(); } private static void setup(String server, int port) throws Exception { /* Establish a thrift connection to the cassandra instance */ TSocket socket = new TSocket(server, port); TTransport transport; System.out.println(" connected to " + server + ":" + port + "."); transport = socket; TBinaryProtocol binaryProtocol = new TBinaryProtocol(transport, false, false); Cassandra.Client cassandraClient = new Cassandra.Client(binaryProtocol); transport.open(); thriftClient = cassandraClient; } /** * usage: java -Dstorage-config="confpath" 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 { String table; int minRow; int maxRow; String rowPrefix; if (args.length > 0) { table = args[0]; rowPrefix = args[1]; minRow = Integer.parseInt(args[2]); maxRow = minRow + 1; } else { table = "Keyspace1"; minRow = 1; maxRow = 10; rowPrefix = "row"; } for (int nRows = minRow; nRows < maxRow; nRows++) { String row = rowPrefix + nRows; ColumnPath col = createColumnPath("Standard1", null, "col1".getBytes()); List<InetAddress> endPoints = ringCache.getEndPoint(table, row); String hosts=""; for (int i = 0; i < endPoints.size(); i++) hosts = hosts + ((i > 0) ? "," : "") + endPoints.get(i); System.out.println("hosts with key " + row + " : " + hosts + "; choose " + endPoints.get(0)); // now, read the row back directly from the host owning the row locally setup(endPoints.get(0).getHostAddress(), DatabaseDescriptor.getThriftPort()); thriftClient.insert(table, row, col, "val1".getBytes(), 1, ConsistencyLevel.ONE); Column column=thriftClient.get(table, row, col, ConsistencyLevel.ONE).column; System.out.println("read row " + row + " " + new String(column.name) + ":" + new String(column.value) + ":" + column.timestamp); } System.exit(1); } }