Skip to content

Commit

Permalink
initial files to address issue #70, the random error generator example
Browse files Browse the repository at this point in the history
  • Loading branch information
tkohegyi committed Jul 19, 2017
1 parent 43ea1ed commit c79f46c
Show file tree
Hide file tree
Showing 10 changed files with 406 additions and 0 deletions.
30 changes: 30 additions & 0 deletions wilma-extras/random.error.generator/README.md
Original file line number Diff line number Diff line change
@@ -0,0 +1,30 @@
Wilma Plugin Example - Random Error Generator
===============================

Purpose of this example
---------------------------------------
This plugin example was created to show how Wilma can be acted as a special kind of Chaos Monkey. See the original Chaos Monkey [tool here](https://github.com/Netflix/chaosmonkey), which tool is created by Netflix for AWS.
So what kind of Chaos Monkey this example will show? This will simulate the following error situations:

- E404 error will be received as response in a certain percentage of the requests, randomly
- E500 error will be received as response for another percentage of the requests, randomly
- response timeout will be cause for another percentage of the requests, randomly


Implementation
---------------------------------------
TBD.

Build
-----
```
#run extras: Random Error Generator example
./gradlew -b wilma-extras/random.error.generator/build.gradle clean build
```
After a successful run you will find the wilma plug-in in folder: wilma-extras/random.error.generator/build/libs as a jar file.

How to Use it?
-----------------------------------------
- Ensure that the compiled randomErrorGenerator jar is available for your Wilma instance
- Configure Wilma to use it (see example configuration above)

9 changes: 9 additions & 0 deletions wilma-extras/random.error.generator/build.gradle
Original file line number Diff line number Diff line change
@@ -0,0 +1,9 @@
group 'com.epam.wilma'

apply plugin: 'java'
apply from: '../../common.gradle'

dependencies {
compile files("../../wilma-application/release/wilma-$version" + '.jar')
testCompile group: 'junit', name: 'junit', version: '4.12'
}
2 changes: 2 additions & 0 deletions wilma-extras/random.error.generator/gradle.properties
Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
componentName=wilma-extras-random-error-generator
buildNumber=DEV
Binary file not shown.
Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
#Thu Feb 16 21:45:02 CET 2017
distributionBase=GRADLE_USER_HOME
distributionPath=wrapper/dists
zipStoreBase=GRADLE_USER_HOME
zipStorePath=wrapper/dists
distributionUrl=https\://services.gradle.org/distributions/gradle-2.13-bin.zip
164 changes: 164 additions & 0 deletions wilma-extras/random.error.generator/gradlew
Original file line number Diff line number Diff line change
@@ -0,0 +1,164 @@
#!/usr/bin/env bash

##############################################################################
##
## Gradle start up script for UN*X
##
##############################################################################

# Attempt to set APP_HOME
# Resolve links: $0 may be a link
PRG="$0"
# Need this for relative symlinks.
while [ -h "$PRG" ] ; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : '.*-> \(.*\)$'`
if expr "$link" : '/.*' > /dev/null; then
PRG="$link"
else
PRG=`dirname "$PRG"`"/$link"
fi
done
SAVED="`pwd`"
cd "`dirname \"$PRG\"`/" >/dev/null
APP_HOME="`pwd -P`"
cd "$SAVED" >/dev/null

APP_NAME="Gradle"
APP_BASE_NAME=`basename "$0"`

# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
DEFAULT_JVM_OPTS=""

# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD="maximum"

warn ( ) {
echo "$*"
}

die ( ) {
echo
echo "$*"
echo
exit 1
}

# 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
;;
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 [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
MAX_FD_LIMIT=`ulimit -H -n`
if [ $? -eq 0 ] ; then
if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
MAX_FD="$MAX_FD_LIMIT"
fi
ulimit -n $MAX_FD
if [ $? -ne 0 ] ; then
warn "Could not set maximum file descriptor limit: $MAX_FD"
fi
else
warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
fi
fi

# For Darwin, add options to specify how the application appears in the dock
if $darwin; then
GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
fi

# For Cygwin, switch paths to Windows format before running java
if $cygwin ; then
APP_HOME=`cygpath --path --mixed "$APP_HOME"`
CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
JAVACMD=`cygpath --unix "$JAVACMD"`

# We build the pattern for arguments to be converted via cygpath
ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
SEP=""
for dir in $ROOTDIRSRAW ; do
ROOTDIRS="$ROOTDIRS$SEP$dir"
SEP="|"
done
OURCYGPATTERN="(^($ROOTDIRS))"
# Add a user-defined pattern to the cygpath arguments
if [ "$GRADLE_CYGPATTERN" != "" ] ; then
OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
fi
# Now convert the arguments - kludge to limit ourselves to /bin/sh
i=0
for arg in "$@" ; do
CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
CHECK2=`echo "$arg"|egrep -c "^-"` ### Determine if an option

if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then ### Added a condition
eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
else
eval `echo args$i`="\"$arg\""
fi
i=$((i+1))
done
case $i in
(0) set -- ;;
(1) set -- "$args0" ;;
(2) set -- "$args0" "$args1" ;;
(3) set -- "$args0" "$args1" "$args2" ;;
(4) set -- "$args0" "$args1" "$args2" "$args3" ;;
(5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
(6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
(7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
(8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
(9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
esac
fi

# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
function splitJvmOpts() {
JVM_OPTS=("$@")
}
eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"

exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"
90 changes: 90 additions & 0 deletions wilma-extras/random.error.generator/gradlew.bat
Original file line number Diff line number Diff line change
@@ -0,0 +1,90 @@
@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=.
set APP_BASE_NAME=%~n0
set APP_HOME=%DIRNAME%

@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=

@rem Find java.exe
if defined JAVA_HOME goto findJavaFromJavaHome

set JAVA_EXE=java.exe
%JAVA_EXE% -version >NUL 2>&1
if "%ERRORLEVEL%" == "0" goto init

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 init

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

:init
@rem Get command-line arguments, handling Windows variants

if not "%OS%" == "Windows_NT" goto win9xME_args
if "%@eval[2+2]" == "4" goto 4NT_args

:win9xME_args
@rem Slurp the command line arguments.
set CMD_LINE_ARGS=
set _SKIP=2

:win9xME_args_slurp
if "x%~1" == "x" goto execute

set CMD_LINE_ARGS=%*
goto execute

:4NT_args
@rem Get arguments from the 4NT Shell from JP Software
set CMD_LINE_ARGS=%$

: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 %CMD_LINE_ARGS%

:end
@rem End local scope for the variables with windows NT shell
if "%ERRORLEVEL%"=="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!
if not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
exit /b 1

:mainEnd
if "%OS%"=="Windows_NT" endlocal

:omega
2 changes: 2 additions & 0 deletions wilma-extras/random.error.generator/settings.gradle
Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
rootProject.name = 'randomErrorGenerator'

Original file line number Diff line number Diff line change
@@ -0,0 +1,67 @@
package com.epam.wilma.extras.randomErrorGenerator;
/*==========================================================================
Copyright 2013-2017 EPAM Systems
This file is part of Wilma.
Wilma is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Wilma is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Wilma. If not, see <http://www.gnu.org/licenses/>.
===========================================================================*/

import com.epam.wilma.domain.http.WilmaHttpRequest;
import com.epam.wilma.domain.stubconfig.dialog.condition.checker.ConditionChecker;
import com.epam.wilma.domain.stubconfig.parameter.ParameterList;

/**
* Example Wilma plugin to simulate random error situations. The following error situations are supported:
* - E404 error will be received as response in a certain percentage of the requests, randomly
* - E500 error will be received as response for another percentage of the requests, randomly
* - response timeout will be cause for another percentage of the requests, randomly
*
* You need to have as many dialog descriptors in the stub configuration as many error situations you would like to simulate.
*
* @author tkohegyi
*/
public class RandomErrorGeneratorChecker implements ConditionChecker {

private static final String PARAMETER_NAME_E404 = "E404";
private static final String PARAMETER_NAME_E500 = "E500";
private static final String PARAMETER_NAME_TIMEOUT = "TIMEOUT120SEC";

@Override
/**
* ConditionChecker method implementation. Based on the received parameters it decides if a certain error condition should happen or not.
*/
public boolean checkCondition(final WilmaHttpRequest request, final ParameterList parameterList) {
boolean needError = false;

//determine parameters
String parameterE500Value = parameterList.get(PARAMETER_NAME_E500);
String parameterTimeoutValue = parameterList.get(PARAMETER_NAME_TIMEOUT);


//Handle E404 part
double parameterE404RealValue = 0.0;
String parameterE404Value = parameterList.get(PARAMETER_NAME_E404);
if (parameterE404Value != null) {
try {
parameterE404RealValue = Double.valueOf(parameterE404Value);
} catch (NumberFormatException e) {
parameterE404RealValue = 0.0;
}
}

return needError;
}

}
Loading

0 comments on commit c79f46c

Please sign in to comment.