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Posted to commits@cassandra.apache.org by br...@apache.org on 2011/02/24 18:37:28 UTC
svn commit: r1074229 -
/cassandra/branches/cassandra-0.7/contrib/stress/src/org/apache/cassandra/contrib/stress/util/Operation.java
Author: brandonwilliams
Date: Thu Feb 24 17:37:28 2011
New Revision: 1074229
URL: http://svn.apache.org/viewvc?rev=1074229&view=rev
Log:
Add missed file from 2020
Added:
cassandra/branches/cassandra-0.7/contrib/stress/src/org/apache/cassandra/contrib/stress/util/Operation.java (with props)
Added: cassandra/branches/cassandra-0.7/contrib/stress/src/org/apache/cassandra/contrib/stress/util/Operation.java
URL: http://svn.apache.org/viewvc/cassandra/branches/cassandra-0.7/contrib/stress/src/org/apache/cassandra/contrib/stress/util/Operation.java?rev=1074229&view=auto
==============================================================================
--- cassandra/branches/cassandra-0.7/contrib/stress/src/org/apache/cassandra/contrib/stress/util/Operation.java (added)
+++ cassandra/branches/cassandra-0.7/contrib/stress/src/org/apache/cassandra/contrib/stress/util/Operation.java Thu Feb 24 17:37:28 2011
@@ -0,0 +1,194 @@
+/**
+ * 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.contrib.stress.util;
+
+import java.io.IOException;
+import java.math.BigInteger;
+import java.security.MessageDigest;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+import org.apache.cassandra.contrib.stress.Session;
+import org.apache.cassandra.contrib.stress.Stress;
+import org.apache.cassandra.thrift.Cassandra;
+import org.apache.cassandra.thrift.InvalidRequestException;
+import org.apache.cassandra.utils.FBUtilities;
+
+public abstract class Operation
+{
+ public final int index;
+
+ protected final Session session;
+ protected static volatile Double nextGaussian = null;
+
+ public Operation(int idx)
+ {
+ index = idx;
+ session = Stress.session;
+ }
+
+ /**
+ * Run operation
+ * @param client Cassandra Thrift client connection
+ * @throws IOException on any I/O error.
+ */
+ public abstract void run(Cassandra.Client client) throws IOException;
+
+ // Utility methods
+
+ /**
+ * def generate_values():
+ * values = []
+ * for i in xrange(0, options.cardinality):
+ * h = md5(str(i)).hexdigest()
+ * values.append(h * int(options.column_size/len(h)) + h[:options.column_size % len(h)])
+ * return values
+ *
+ * @return Collection of the values
+ */
+ protected List<String> generateValues()
+ {
+ List<String> values = new ArrayList<String>();
+
+ for (int i = 0; i < session.getCardinality(); i++)
+ {
+ String hash = getMD5(Integer.toString(i));
+ int times = session.getColumnSize() / hash.length();
+ int sumReminder = session.getColumnSize() % hash.length();
+
+ values.add(new StringBuilder(multiplyString(hash, times)).append(hash.substring(0, sumReminder)).toString());
+ }
+
+ return values;
+ }
+
+ /**
+ * key generator using Gauss or Random algorithm
+ * @return byte[] representation of the key string
+ */
+ protected static byte[] generateKey()
+ {
+ return (Stress.session.useRandomGenerator()) ? generateRandomKey() : generateGaussKey();
+ }
+
+ /**
+ * Random key generator
+ * @return byte[] representation of the key string
+ */
+ private static byte[] generateRandomKey()
+ {
+ String format = "%0" + Stress.session.getTotalKeysLength() + "d";
+ return String.format(format, Stress.randomizer.nextInt(Stress.session.getNumKeys() - 1)).getBytes();
+ }
+
+ /**
+ * Gauss key generator
+ * @return byte[] representation of the key string
+ */
+ private static byte[] generateGaussKey()
+ {
+ Session session = Stress.session;
+ String format = "%0" + session.getTotalKeysLength() + "d";
+
+ for (;;)
+ {
+ double token = nextGaussian(session.getMean(), session.getSigma());
+
+ if (0 <= token && token < session.getNumKeys())
+ {
+ return String.format(format, (int) token).getBytes();
+ }
+ }
+ }
+
+ /**
+ * Gaussian distribution.
+ * @param mu is the mean
+ * @param sigma is the standard deviation
+ *
+ * @return next Gaussian distribution number
+ */
+ private static double nextGaussian(int mu, float sigma)
+ {
+ Random random = Stress.randomizer;
+
+ Double currentState = nextGaussian;
+ nextGaussian = null;
+
+ if (currentState == null)
+ {
+ double x2pi = random.nextDouble() * 2 * Math.PI;
+ double g2rad = Math.sqrt(-2.0 * Math.log(1.0 - random.nextDouble()));
+
+ currentState = Math.cos(x2pi) * g2rad;
+ nextGaussian = Math.sin(x2pi) * g2rad;
+ }
+
+ return mu + currentState * sigma;
+ }
+
+ /**
+ * MD5 string generation
+ * @param input String
+ * @return md5 representation of the string
+ */
+ private String getMD5(String input)
+ {
+ MessageDigest md = FBUtilities.threadLocalMD5Digest();
+ byte[] messageDigest = md.digest(input.getBytes());
+ StringBuilder hash = new StringBuilder(new BigInteger(1, messageDigest).toString(16));
+
+ while (hash.length() < 32)
+ hash.append("0").append(hash);
+
+ return hash.toString();
+ }
+
+ /**
+ * Equal to python/ruby - 's' * times
+ * @param str String to multiple
+ * @param times multiplication times
+ * @return multiplied string
+ */
+ private String multiplyString(String str, int times)
+ {
+ StringBuilder result = new StringBuilder();
+
+ for (int i = 0; i < times; i++)
+ result.append(str);
+
+ return result.toString();
+ }
+
+ protected String getExceptionMessage(Exception e)
+ {
+ String className = e.getClass().getSimpleName();
+ String message = (e instanceof InvalidRequestException) ? ((InvalidRequestException) e).getWhy() : e.getMessage();
+ return (message == null) ? "(" + className + ")" : String.format("(%s): %s", className, message);
+ }
+
+ protected void error(String message) throws IOException
+ {
+ if (!session.ignoreErrors())
+ throw new IOException(message);
+ else
+ System.err.println(message);
+ }
+}
Propchange: cassandra/branches/cassandra-0.7/contrib/stress/src/org/apache/cassandra/contrib/stress/util/Operation.java
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