| /* |
| * 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.hadoop; |
| |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.mapreduce.InputSplit; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.EOFException; |
| import java.io.IOException; |
| import java.util.Arrays; |
| |
| public class ColumnFamilySplit extends InputSplit implements Writable, org.apache.hadoop.mapred.InputSplit |
| { |
| private String startToken; |
| private String endToken; |
| private long length; |
| private String[] dataNodes; |
| |
| @Deprecated |
| public ColumnFamilySplit(String startToken, String endToken, String[] dataNodes) |
| { |
| this(startToken, endToken, Long.MAX_VALUE, dataNodes); |
| } |
| |
| public ColumnFamilySplit(String startToken, String endToken, long length, String[] dataNodes) |
| { |
| assert startToken != null; |
| assert endToken != null; |
| this.startToken = startToken; |
| this.endToken = endToken; |
| this.length = length; |
| this.dataNodes = dataNodes; |
| } |
| |
| public String getStartToken() |
| { |
| return startToken; |
| } |
| |
| public String getEndToken() |
| { |
| return endToken; |
| } |
| |
| // getLength and getLocations satisfy the InputSplit abstraction |
| |
| public long getLength() |
| { |
| return length; |
| } |
| |
| public String[] getLocations() |
| { |
| return dataNodes; |
| } |
| |
| // This should only be used by KeyspaceSplit.read(); |
| protected ColumnFamilySplit() {} |
| |
| // These three methods are for serializing and deserializing |
| // KeyspaceSplits as needed by the Writable interface. |
| public void write(DataOutput out) throws IOException |
| { |
| out.writeUTF(startToken); |
| out.writeUTF(endToken); |
| out.writeInt(dataNodes.length); |
| for (String endpoint : dataNodes) |
| { |
| out.writeUTF(endpoint); |
| } |
| out.writeLong(length); |
| } |
| |
| public void readFields(DataInput in) throws IOException |
| { |
| startToken = in.readUTF(); |
| endToken = in.readUTF(); |
| int numOfEndpoints = in.readInt(); |
| dataNodes = new String[numOfEndpoints]; |
| for(int i = 0; i < numOfEndpoints; i++) |
| { |
| dataNodes[i] = in.readUTF(); |
| } |
| try |
| { |
| length = in.readLong(); |
| } |
| catch (EOFException e) |
| { |
| //We must be deserializing in a mixed-version cluster. |
| } |
| } |
| |
| @Override |
| public String toString() |
| { |
| return "ColumnFamilySplit(" + |
| "(" + startToken |
| + ", '" + endToken + ']' |
| + " @" + (dataNodes == null ? null : Arrays.asList(dataNodes)) + ')'; |
| } |
| |
| public static ColumnFamilySplit read(DataInput in) throws IOException |
| { |
| ColumnFamilySplit w = new ColumnFamilySplit(); |
| w.readFields(in); |
| return w; |
| } |
| } |