/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2009 Sun Microsystems, Inc.
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*/
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package com.sun.opends.sdk.tools;
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import java.io.BufferedReader;
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import java.io.FileReader;
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import java.io.IOException;
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import java.util.*;
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import com.sun.opends.sdk.util.Validator;
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/**
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* A source of data for performance tools.
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*/
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final class DataSource
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{
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private static interface IDataSource
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{
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public Object getData();
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public IDataSource duplicate();
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}
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private static class RandomNumberDataSource implements IDataSource
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{
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private final Random random;
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private final int offset;
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private final int range;
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public RandomNumberDataSource(long seed, int low, int high)
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{
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random = new Random(seed);
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offset = low;
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range = high - low;
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}
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public Object getData()
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{
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return random.nextInt(range) + offset;
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}
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public IDataSource duplicate()
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{
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// There is no state info so threads can just share one instance.
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return this;
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}
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}
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private static class IncrementNumberDataSource implements IDataSource
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{
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private final int low;
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private int next;
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private final int high;
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public IncrementNumberDataSource(int low, int high)
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{
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this.low = this.next = low;
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this.high = high;
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}
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public Object getData()
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{
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if (next == high)
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{
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next = low;
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return high;
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}
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return next++;
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}
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public IDataSource duplicate()
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{
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return new IncrementNumberDataSource(low, high);
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}
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}
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private static class RandomLineFileDataSource implements IDataSource
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{
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private final List<String> lines;
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private final Random random;
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public RandomLineFileDataSource(long seed, String file)
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throws IOException
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{
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lines = new ArrayList<String>();
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random = new Random(seed);
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BufferedReader in = new BufferedReader(new FileReader(file));
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String line;
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while ((line = in.readLine()) != null)
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{
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lines.add(line);
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}
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}
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public Object getData()
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{
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return lines.get(random.nextInt(lines.size()));
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}
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public IDataSource duplicate()
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{
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return this;
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}
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}
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private static class IncrementLineFileDataSource implements
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IDataSource
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{
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private final List<String> lines;
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private int next;
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public IncrementLineFileDataSource(String file) throws IOException
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{
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lines = new ArrayList<String>();
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BufferedReader in = new BufferedReader(new FileReader(file));
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String line;
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while ((line = in.readLine()) != null)
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{
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lines.add(line);
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}
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}
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private IncrementLineFileDataSource(List<String> lines)
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{
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this.lines = lines;
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}
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public Object getData()
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{
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if (next == lines.size())
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{
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next = 0;
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}
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return lines.get(next++);
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}
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public IDataSource duplicate()
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{
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return new IncrementLineFileDataSource(lines);
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}
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}
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private static class RandomStringDataSource implements IDataSource
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{
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private final Random random;
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private final int length;
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private final Character[] charSet;
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private RandomStringDataSource(int seed, int length, String charSet)
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{
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this.length = length;
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Set<Character> chars = new HashSet<Character>();
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for (int i = 0; i < charSet.length(); i++)
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{
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char c = charSet.charAt(i);
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if (c == '[')
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{
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i += 1;
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char start = charSet.charAt(i);
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i += 2;
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char end = charSet.charAt(i);
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i += 1;
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for (int j = start; j <= end; j++)
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{
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chars.add((char) j);
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}
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}
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else
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{
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chars.add(c);
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}
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}
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this.charSet = chars.toArray(new Character[chars.size()]);
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this.random = new Random(seed);
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}
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public Object getData()
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{
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char[] str = new char[length];
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for (int i = 0; i < length; i++)
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{
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str[i] = charSet[random.nextInt(charSet.length)];
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}
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return new String(str);
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}
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public IDataSource duplicate()
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{
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return this;
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}
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}
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private static class StaticDataSource implements IDataSource
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{
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private final Object data;
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private StaticDataSource(Object data)
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{
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this.data = data;
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}
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public Object getData()
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{
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return data;
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}
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public IDataSource duplicate()
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{
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// There is no state info so threads can just share one instance.
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return this;
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}
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}
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private IDataSource impl;
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private DataSource(IDataSource impl)
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{
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this.impl = impl;
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}
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public Object getData()
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{
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return impl.getData();
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}
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public DataSource duplicate()
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{
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IDataSource dup = impl.duplicate();
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if (dup == impl)
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{
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return this;
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}
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else
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{
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return new DataSource(dup);
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}
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}
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/**
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* Parses a list of source definitions into an array of data source
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* objects. A data source is defined as follows: - rand({min},{max})
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* generates a random integer between the min and max. -
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* rand({filename}) retrieves a random line from a file. -
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* inc({min},{max}) returns incremental integer between the min and
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* max. - inc({filename}) retrieves lines in order from a file. -
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* {number} always return the integer as given. - {string} always
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* return the string as given.
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*
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* @param sources
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* The list of source definitions to parse.
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* @return The array of parsed data sources.
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* @throws IOException
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* If an exception occurs while reading a file.
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*/
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public static DataSource[] parse(List<String> sources)
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throws IOException
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{
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Validator.ensureNotNull(sources);
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DataSource[] dataSources = new DataSource[sources.size()];
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for (int i = 0; i < sources.size(); i++)
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{
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String dataSourceDef = sources.get(i);
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if (dataSourceDef.startsWith("rand(")
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&& dataSourceDef.endsWith(")"))
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{
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int lparenPos = dataSourceDef.indexOf("(");
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int commaPos = dataSourceDef.indexOf(",");
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int rparenPos = dataSourceDef.indexOf(")");
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if (commaPos < 0)
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{
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// This is a file name
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dataSources[i] =
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new DataSource(new RandomLineFileDataSource(0,
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dataSourceDef.substring(lparenPos + 1, rparenPos)));
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}
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else
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{
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// This range of integers
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int low =
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Integer.parseInt(dataSourceDef.substring(lparenPos + 1,
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commaPos));
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int high =
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Integer.parseInt(dataSourceDef.substring(commaPos + 1,
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rparenPos));
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dataSources[i] =
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new DataSource(new RandomNumberDataSource(0, low, high));
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}
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}
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else if (dataSourceDef.startsWith("randstr(")
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&& dataSourceDef.endsWith(")"))
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{
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int lparenPos = dataSourceDef.indexOf("(");
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int commaPos = dataSourceDef.indexOf(",");
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int rparenPos = dataSourceDef.indexOf(")");
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int length;
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String charSet;
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if (commaPos < 0)
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{
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length =
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Integer.parseInt(dataSourceDef.substring(lparenPos + 1,
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rparenPos));
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charSet = "[A-Z][a-z][0-9]";
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}
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else
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{
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// length and charSet
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length =
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Integer.parseInt(dataSourceDef.substring(lparenPos + 1,
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commaPos));
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charSet = dataSourceDef.substring(commaPos + 1, rparenPos);
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}
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dataSources[i] =
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new DataSource(new RandomStringDataSource(0, length,
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charSet));
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}
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else if (dataSourceDef.startsWith("inc(")
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&& dataSourceDef.endsWith(")"))
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{
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int lparenPos = dataSourceDef.indexOf("(");
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int commaPos = dataSourceDef.indexOf(",");
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int rparenPos = dataSourceDef.indexOf(")");
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if (commaPos < 0)
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{
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// This is a file name
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dataSources[i] =
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new DataSource(new IncrementLineFileDataSource(
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dataSourceDef.substring(lparenPos + 1, rparenPos)));
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}
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else
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{
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int low =
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Integer.parseInt(dataSourceDef.substring(lparenPos + 1,
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commaPos));
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int high =
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Integer.parseInt(dataSourceDef.substring(commaPos + 1,
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rparenPos));
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dataSources[i] =
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new DataSource(new IncrementNumberDataSource(low, high));
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}
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}
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else
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{
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try
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{
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dataSources[i] =
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new DataSource(new StaticDataSource(Integer
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.parseInt(dataSourceDef)));
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}
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catch (NumberFormatException nfe)
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{
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dataSources[i] =
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new DataSource(new StaticDataSource(dataSourceDef));
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}
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}
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}
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return dataSources;
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}
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/**
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* Returns Generated data from the specified data sources. Generated
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* data will be placed in the specified data array. If the data array
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* is null or smaller than the number of data sources, one will be
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* allocated.
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*
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* @param dataSources
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* Data sources that will generate arguments referenced by
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* the format specifiers in the format string.
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* @param data
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* The array where genereated data will be placed to format
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* the string.
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* @return A formatted string
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*/
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public static Object[] generateData(DataSource[] dataSources,
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Object[] data)
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{
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if (data == null || data.length < dataSources.length)
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{
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data = new Object[dataSources.length];
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}
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for (int i = 0; i < dataSources.length; i++)
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{
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data[i] = dataSources[i].getData();
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}
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return data;
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}
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}
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