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Mark Nellemann 2023-06-27 17:45:15 +02:00
commit 9ea6a1eecb
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.gitattributes vendored Normal file
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#
# https://help.github.com/articles/dealing-with-line-endings/
#
# Linux start script should use lf
/gradlew text eol=lf
# These are Windows script files and should use crlf
*.bat text eol=crlf

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.gradle
.vscode
.idea
bin
build

0
LICENSE Normal file
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build.gradle Normal file
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plugins {
id 'groovy'
id 'application'
id "net.nemerosa.versioning" version "2.15.1"
id "com.netflix.nebula.ospackage" version "11.2.0"
id 'com.github.johnrengelman.shadow' version '8.1.1'
}
repositories {
mavenCentral()
}
dependencies {
testImplementation 'org.codehaus.groovy:groovy:3.0.13'
testImplementation 'org.spockframework:spock-core:2.2-groovy-3.0'
testImplementation 'junit:junit:4.13.2'
annotationProcessor 'info.picocli:picocli-codegen:4.7.4'
implementation 'info.picocli:picocli:4.7.4'
implementation 'org.slf4j:slf4j-api:2.0.7'
implementation 'ch.qos.logback:logback-classic:1.3.8'
}
java {
toolchain {
languageVersion = JavaLanguageVersion.of(8)
}
sourceCompatibility = JavaVersion.VERSION_1_8
targetCompatibility = JavaVersion.VERSION_1_8
}
application {
mainClass = 'biz.nellemann.memstress.Application'
}
tasks.named('test') {
useJUnitPlatform()
}
group = projectGroup
version = projectVersion
jar {
manifest {
attributes(
'Created-By' : "Gradle ${gradle.gradleVersion}",
'Build-OS' : "${System.properties['os.name']} ${System.properties['os.arch']} ${System.properties['os.version']}",
'Build-Jdk' : "${System.properties['java.version']} (${System.properties['java.vendor']} ${System.properties['java.vm.version']})",
'Build-User' : System.properties['user.name'],
'Build-Version' : versioning.info.tag ?: (versioning.info.branch + "-" + versioning.info.build),
'Build-Revision' : versioning.info.commit,
'Build-Timestamp': new Date().format("yyyy-MM-dd'T'HH:mm:ss.SSSZ").toString(),
)
}
}
apply plugin: 'com.netflix.nebula.ospackage'
ospackage {
packageName = 'memstress'
release = '1'
user = 'root'
packager = "Mark Nellemann <mark.nellemann@gmail.com>"
into '/opt/memstress'
from(shadowJar.outputs.files) {
into 'lib'
}
from('build/scriptsShadow') {
into 'bin'
}
from(['README.md', 'LICENSE']) {
into 'doc'
}
}
buildDeb {
dependsOn build, startShadowScripts
}
buildRpm {
dependsOn build, startShadowScripts
os = org.redline_rpm.header.Os.LINUX
}
tasks.register("packages") {
group "build"
dependsOn ":buildDeb"
dependsOn ":buildRpm"
}

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gradle.properties Normal file
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projectId = memstress
projectGroup = biz.nellemann.memstress
projectVersion = 0.0.1

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gradle/wrapper/gradle-wrapper.properties vendored Normal file
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distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
networkTimeout=10000
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists

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#!/bin/sh
#
# Copyright © 2015-2021 the original authors.
#
# Licensed 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
#
# https://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.
#
##############################################################################
#
# Gradle start up script for POSIX generated by Gradle.
#
# Important for running:
#
# (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
# noncompliant, but you have some other compliant shell such as ksh or
# bash, then to run this script, type that shell name before the whole
# command line, like:
#
# ksh Gradle
#
# Busybox and similar reduced shells will NOT work, because this script
# requires all of these POSIX shell features:
# * functions;
# * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
# «${var#prefix}», «${var%suffix}», and «$( cmd )»;
# * compound commands having a testable exit status, especially «case»;
# * various built-in commands including «command», «set», and «ulimit».
#
# Important for patching:
#
# (2) This script targets any POSIX shell, so it avoids extensions provided
# by Bash, Ksh, etc; in particular arrays are avoided.
#
# The "traditional" practice of packing multiple parameters into a
# space-separated string is a well documented source of bugs and security
# problems, so this is (mostly) avoided, by progressively accumulating
# options in "$@", and eventually passing that to Java.
#
# Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
# and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
# see the in-line comments for details.
#
# There are tweaks for specific operating systems such as AIX, CygWin,
# Darwin, MinGW, and NonStop.
#
# (3) This script is generated from the Groovy template
# https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
# within the Gradle project.
#
# You can find Gradle at https://github.com/gradle/gradle/.
#
##############################################################################
# Attempt to set APP_HOME
# Resolve links: $0 may be a link
app_path=$0
# Need this for daisy-chained symlinks.
while
APP_HOME=${app_path%"${app_path##*/}"} # leaves a trailing /; empty if no leading path
[ -h "$app_path" ]
do
ls=$( ls -ld "$app_path" )
link=${ls#*' -> '}
case $link in #(
/*) app_path=$link ;; #(
*) app_path=$APP_HOME$link ;;
esac
done
# This is normally unused
# shellcheck disable=SC2034
APP_BASE_NAME=${0##*/}
APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD=maximum
warn () {
echo "$*"
} >&2
die () {
echo
echo "$*"
echo
exit 1
} >&2
# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
nonstop=false
case "$( uname )" in #(
CYGWIN* ) cygwin=true ;; #(
Darwin* ) darwin=true ;; #(
MSYS* | MINGW* ) msys=true ;; #(
NONSTOP* ) nonstop=true ;;
esac
CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
# Determine the Java command to use to start the JVM.
if [ -n "$JAVA_HOME" ] ; then
if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
# IBM's JDK on AIX uses strange locations for the executables
JAVACMD=$JAVA_HOME/jre/sh/java
else
JAVACMD=$JAVA_HOME/bin/java
fi
if [ ! -x "$JAVACMD" ] ; then
die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
else
JAVACMD=java
which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
Please set the JAVA_HOME variable in your environment to match the
location of your Java installation."
fi
# Increase the maximum file descriptors if we can.
if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
case $MAX_FD in #(
max*)
# In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
# shellcheck disable=SC3045
MAX_FD=$( ulimit -H -n ) ||
warn "Could not query maximum file descriptor limit"
esac
case $MAX_FD in #(
'' | soft) :;; #(
*)
# In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
# shellcheck disable=SC3045
ulimit -n "$MAX_FD" ||
warn "Could not set maximum file descriptor limit to $MAX_FD"
esac
fi
# Collect all arguments for the java command, stacking in reverse order:
# * args from the command line
# * the main class name
# * -classpath
# * -D...appname settings
# * --module-path (only if needed)
# * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
# For Cygwin or MSYS, switch paths to Windows format before running java
if "$cygwin" || "$msys" ; then
APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
JAVACMD=$( cygpath --unix "$JAVACMD" )
# Now convert the arguments - kludge to limit ourselves to /bin/sh
for arg do
if
case $arg in #(
-*) false ;; # don't mess with options #(
/?*) t=${arg#/} t=/${t%%/*} # looks like a POSIX filepath
[ -e "$t" ] ;; #(
*) false ;;
esac
then
arg=$( cygpath --path --ignore --mixed "$arg" )
fi
# Roll the args list around exactly as many times as the number of
# args, so each arg winds up back in the position where it started, but
# possibly modified.
#
# NB: a `for` loop captures its iteration list before it begins, so
# changing the positional parameters here affects neither the number of
# iterations, nor the values presented in `arg`.
shift # remove old arg
set -- "$@" "$arg" # push replacement arg
done
fi
# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
# Collect all arguments for the java command;
# * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
# shell script including quotes and variable substitutions, so put them in
# double quotes to make sure that they get re-expanded; and
# * put everything else in single quotes, so that it's not re-expanded.
set -- \
"-Dorg.gradle.appname=$APP_BASE_NAME" \
-classpath "$CLASSPATH" \
org.gradle.wrapper.GradleWrapperMain \
"$@"
# Stop when "xargs" is not available.
if ! command -v xargs >/dev/null 2>&1
then
die "xargs is not available"
fi
# Use "xargs" to parse quoted args.
#
# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
#
# In Bash we could simply go:
#
# readarray ARGS < <( xargs -n1 <<<"$var" ) &&
# set -- "${ARGS[@]}" "$@"
#
# but POSIX shell has neither arrays nor command substitution, so instead we
# post-process each arg (as a line of input to sed) to backslash-escape any
# character that might be a shell metacharacter, then use eval to reverse
# that process (while maintaining the separation between arguments), and wrap
# the whole thing up as a single "set" statement.
#
# This will of course break if any of these variables contains a newline or
# an unmatched quote.
#
eval "set -- $(
printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
xargs -n1 |
sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
tr '\n' ' '
)" '"$@"'
exec "$JAVACMD" "$@"

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@rem
@rem Copyright 2015 the original author or authors.
@rem
@rem Licensed under the Apache License, Version 2.0 (the "License");
@rem you may not use this file except in compliance with the License.
@rem You may obtain a copy of the License at
@rem
@rem https://www.apache.org/licenses/LICENSE-2.0
@rem
@rem Unless required by applicable law or agreed to in writing, software
@rem distributed under the License is distributed on an "AS IS" BASIS,
@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@rem See the License for the specific language governing permissions and
@rem limitations under the License.
@rem
@if "%DEBUG%"=="" @echo off
@rem ##########################################################################
@rem
@rem Gradle startup script for Windows
@rem
@rem ##########################################################################
@rem Set local scope for the variables with windows NT shell
if "%OS%"=="Windows_NT" setlocal
set DIRNAME=%~dp0
if "%DIRNAME%"=="" set DIRNAME=.
@rem This is normally unused
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%
@rem Resolve any "." and ".." in APP_HOME to make it shorter.
for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome
set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if %ERRORLEVEL% equ 0 goto execute
echo.
echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:findJavaFromJavaHome
set JAVA_HOME=%JAVA_HOME:"=%
set JAVA_EXE=%JAVA_HOME%/bin/java.exe
if exist "%JAVA_EXE%" goto execute
echo.
echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
echo.
echo Please set the JAVA_HOME variable in your environment to match the
echo location of your Java installation.
goto fail
:execute
@rem Setup the command line
set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
@rem Execute Gradle
"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
:end
@rem End local scope for the variables with windows NT shell
if %ERRORLEVEL% equ 0 goto mainEnd
:fail
rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
rem the _cmd.exe /c_ return code!
set EXIT_CODE=%ERRORLEVEL%
if %EXIT_CODE% equ 0 set EXIT_CODE=1
if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
exit /b %EXIT_CODE%
:mainEnd
if "%OS%"=="Windows_NT" endlocal
:omega

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/*
* This file was generated by the Gradle 'init' task.
*
* The settings file is used to specify which projects to include in your build.
*
* Detailed information about configuring a multi-project build in Gradle can be found
* in the user manual at https://docs.gradle.org/8.1.1/userguide/multi_project_builds.html
*/
plugins {
// Apply the foojay-resolver plugin to allow automatic download of JDKs
id 'org.gradle.toolchains.foojay-resolver-convention' version '0.4.0'
}
rootProject.name = 'memstress'

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src/main/java/biz/nellemann/memstress/Application.java Normal file
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package biz.nellemann.memstress;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import picocli.CommandLine;
import java.util.Scanner;
import java.util.concurrent.Callable;
@CommandLine.Command(name = "memstress", mixinStandardHelpOptions = true, versionProvider = VersionProvider.class, description = "Memory performance measurement tool.")
public class Application implements Callable<Integer> {
final Logger log = LoggerFactory.getLogger(Application.class);
@CommandLine.Option(names = { "-t", "--tables" }, paramLabel = "NUM", description = "Create this many tables [default: ${DEFAULT-VALUE}]")
int maxTables = 4;
@CommandLine.Option(names = { "-r", "--rows" }, paramLabel = "NUM", description = "Create this many rows pr. table [default: ${DEFAULT-VALUE}]")
int maxRowsPerTable = 10;
@CommandLine.Option(names = { "-d", "--data" }, paramLabel = "NUM", description = "Create this much data (MB) pr. row [default: ${DEFAULT-VALUE}]")
int maxDataPerRow = 100;
@Override
public Integer call() throws Exception {
MyDatabase database = new MyDatabase(maxTables, maxRowsPerTable, maxDataPerRow);
database.build("testDb");
System.out.println("TODO: How to search / read from data stored in rows?");
Scanner scanner = new Scanner(System.in);
System.out.println("Press ENTER to stop");
String s= scanner.nextLine();
scanner.close();
database.destroy("testDb");
return 0;
}
public static void main(String... args) {
int exitCode = new CommandLine(new Application()).execute(args);
System.exit(exitCode);
}
}

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src/main/java/biz/nellemann/memstress/MyDatabase.java Normal file
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package biz.nellemann.memstress;
import biz.nellemann.memstress.db.Database;
import biz.nellemann.memstress.db.DatabaseManager;
import biz.nellemann.memstress.db.Table;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.nio.ByteBuffer;
import java.time.Duration;
import java.time.Instant;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Random;
public class MyDatabase {
final Logger log = LoggerFactory.getLogger(MyDatabase.class);
private final int BYTE_SIZE_1MB = 1_000_000;
private final int BYTE_SIZE_1GB = 1_000_000_000;
private final DatabaseManager databaseManager = new DatabaseManager();
private final Random random = new Random();
// Use when searching or using later?
private final ArrayList<Table> tables = new ArrayList<Table>();
private final int maxTables;
private final int maxRowsPerTable;
private final int maxDataPerRow;
public MyDatabase(int tables, int rows, int size) {
this.maxTables = tables;
this.maxRowsPerTable = rows;
this.maxDataPerRow = size;
}
public Database build(String dbName) {
Instant instant1 = Instant.now();
Database database = databaseManager.createDatabase(dbName);
for(int t = 1; t <= maxTables; t++) {
String tableName = String.format("table_%d", t);
log.info("Creating table \"{}\"", tableName);
Table table = database.createTable(tableName);
for(int r = 1; r <= maxRowsPerTable; r++) {
String rowIdx = String.format("%d_of_%d", r, maxRowsPerTable);
HashMap<String, ByteBuffer> map = new HashMap<String,ByteBuffer>();
for(int m = 1; m <= maxDataPerRow; m++) {
map.put(randomString(128), ByteBuffer.wrap(randomBytes(BYTE_SIZE_1MB)) );
}
table.insertEntry(rowIdx, map);
}
tables.add(table);
}
Instant instant2 = Instant.now();
log.info("Done building in-memory database \"{}\" in {}", dbName, Duration.between(instant1, instant2));
return database;
}
String randomString(final int length) {
StringBuilder sb = new StringBuilder(length);
for(int l = 0; l < length; l++) {
sb.append( (char) random.nextInt(65_535));
}
return sb.toString();
}
byte[] randomBytes(final int length) {
byte[] randomArray = new byte[length];
random.nextBytes(randomArray);
return randomArray;
}
void destroy(final String dbName) {
databaseManager.deleteDatabase(dbName);
}
}

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src/main/java/biz/nellemann/memstress/VersionProvider.java Normal file
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package biz.nellemann.memstress;
import picocli.CommandLine;
import java.io.IOException;
import java.util.jar.Attributes;
import java.util.jar.Manifest;
class VersionProvider implements CommandLine.IVersionProvider {
public String[] getVersion() throws IOException {
Manifest manifest = new Manifest(getClass().getResourceAsStream("/META-INF/MANIFEST.MF"));
Attributes attrs = manifest.getMainAttributes();
return new String[] { "${COMMAND-FULL-NAME} " + attrs.getValue("Build-Version") };
}
}

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src/main/java/biz/nellemann/memstress/db/Database.java Normal file
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/**
* Example taken from: https://medium.com/@mithoonkumar/design-an-in-memory-nosql-database-ood-428d48b68dfa
*/
package biz.nellemann.memstress.db;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Date;
import java.util.HashMap;
public class Database {
final Logger log = LoggerFactory.getLogger(Database.class);
private String name;
private HashMap<String, Table> tableHashMap;
private Date createdAt;
public Database(String name) {
this.name = name;
this.tableHashMap = new HashMap<>();
this.createdAt = new Date();
}
public Table createTable(String tableName) {
if (tableHashMap.containsKey(tableName)) {
log.warn("createTable() - A table already exists with the given name: {}", tableName);
} else {
Table table = new Table(tableName);
tableHashMap.put(tableName, table);
log.debug("createTable() - Table successfully created: {}", tableName);
}
return tableHashMap.get(tableName);
}
public void dropTable(String tableName) {
tableHashMap.remove(tableName);
log.debug("dropTable() - Table successfully dropped: {}", tableName);
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public HashMap<String, Table> getTableHashMap() {
return tableHashMap;
}
public void setTableHashMap(HashMap<String, Table> tableHashMap) {
this.tableHashMap = tableHashMap;
}
public Date getCreatedAt() {
return createdAt;
}
public void setCreatedAt(Date createdAt) {
this.createdAt = createdAt;
}
}

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src/main/java/biz/nellemann/memstress/db/DatabaseManager.java Normal file
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/**
* Example taken from: https://medium.com/@mithoonkumar/design-an-in-memory-nosql-database-ood-428d48b68dfa
*/
package biz.nellemann.memstress.db;
import java.util.HashMap;
public class DatabaseManager {
private HashMap<String, Database> databaseHashMap;
public Database createDatabase(String databaseName) {
if (databaseHashMap.containsKey(databaseName)) {
System.out.println("A database already exists with this name");
} else {
databaseHashMap.put(databaseName, new Database(databaseName));
}
return databaseHashMap.get(databaseName);
}
public void deleteDatabase(String databaseName) {
databaseHashMap.remove(databaseName);
}
public DatabaseManager() {
this.databaseHashMap = new HashMap<>();
}
public HashMap<String, Database> getDatabaseHashMap() {
return databaseHashMap;
}
public void setDatabaseHashMap(HashMap<String, Database> databaseHashMap) {
this.databaseHashMap = databaseHashMap;
}
}

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src/main/java/biz/nellemann/memstress/db/Row.java Normal file
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/**
* Example taken from: https://medium.com/@mithoonkumar/design-an-in-memory-nosql-database-ood-428d48b68dfa
*/
package biz.nellemann.memstress.db;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.nio.ByteBuffer;
import java.util.Date;
import java.util.HashMap;
public class Row {
final Logger log = LoggerFactory.getLogger(Row.class);
private String rowId;
private HashMap<String, ByteBuffer> columnValuesMap;
private Date createdAt;
private Date UpdatedAt;
public Row(String rowId, HashMap<String, ByteBuffer> columnsMap, Date createdAt, Date updatedAt) {
this.rowId = rowId;
this.columnValuesMap = columnsMap;
this.createdAt = createdAt;
UpdatedAt = updatedAt;
}
public HashMap<String, ByteBuffer> getColumnValuesMap() {
return columnValuesMap;
}
public void setColumnValuesMap(HashMap<String, ByteBuffer> columnValuesMap) {
this.columnValuesMap = columnValuesMap;
}
public String getRowId() {
return rowId;
}
public void setRowId(String rowId) {
this.rowId = rowId;
}
public Date getCreatedAt() {
return createdAt;
}
public void setCreatedAt(Date createdAt) {
this.createdAt = createdAt;
}
public Date getUpdatedAt() {
return UpdatedAt;
}
public void setUpdatedAt(Date updatedAt) {
UpdatedAt = updatedAt;
}
}

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src/main/java/biz/nellemann/memstress/db/Table.java Normal file
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/**
* Example taken from: https://medium.com/@mithoonkumar/design-an-in-memory-nosql-database-ood-428d48b68dfa
*/
package biz.nellemann.memstress.db;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.nio.ByteBuffer;
import java.util.Date;
import java.util.HashMap;
public class Table {
final Logger log = LoggerFactory.getLogger(Table.class);
private String tableName;
private HashMap<String, Row> rows;
private Date createdAt;
public Table(String tableName) {
this.tableName = tableName;
this.rows = new HashMap<>();
this.createdAt = new Date();
}
public void insertEntry(String rowId, HashMap<String, ByteBuffer> columnsMap) {
if (rows.containsKey(rowId)) {
log.warn("insertEntry() - Insertion failed, duplicate primary key: {}", rowId);
} else {
Row row = new Row(rowId, columnsMap, new Date(), new Date());
rows.put(rowId, row);
log.debug("insertEntry() - Row successfully added: {}", rowId);
}
}
public void updateEntry(String rowId, HashMap<String, ByteBuffer>valuesMap) {
Row row = rows.get(rowId);
valuesMap.forEach( (k, v) -> {
row.getColumnValuesMap().put(k, v);
});
log.debug("updateEntry() - Row successfully updated: {}", rowId);
row.setUpdatedAt(new Date());
}
public void deleteEntry(String rowId) {
log.debug("updateEntry() - Row successfully deleted: {}", rowId);
rows.remove(rowId);
}
public HashMap<String, ByteBuffer> readEntry(String rowId) {
return rows.get(rowId).getColumnValuesMap();
}
public HashMap<String, Row> getRows() {
return rows;
}
public void setRows(HashMap<String, Row> rows) {
this.rows = rows;
}
public String getTableName() {
return tableName;
}
public void setTableName(String tableName) {
this.tableName = tableName;
}
public Date getCreatedAt() {
return createdAt;
}
public void setCreatedAt(Date createdAt) {
this.createdAt = createdAt;
}
}

14
src/main/resources/logback.xml Normal file
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@ -0,0 +1,14 @@
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<withJansi>false</withJansi>
<encoder>
<pattern>%cyan(%d{yyyy-MM-dd HH:mm:ss.SSS}) %gray([%-10thread]) %highlight(%-5level) %magenta(%logger{12}) - %msg%n</pattern>
</encoder>
</appender>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

10
src/test/groovy/biz/nellemann/memstress/ApplicationTest.groovy Normal file
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@ -0,0 +1,10 @@
/*
* This Spock specification was generated by the Gradle 'init' task.
*/
package biz.nellemann.memstress
import spock.lang.Specification
class ApplicationTest extends Specification {
}