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Email_Service
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chandrasegar:get_connection
chandrasegar:exception
chandrasegar:customException
chandrasegar:merge_customException
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chandrasegar:get_connection
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chandrasegar:customException
chandrasegar:merge_customException
chandrasegar:develop
chandrasegar:main

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get_connec ... main

28 changed files with 2 additions and 1484 deletions
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33
.gitignore vendored
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HELP.md
target/
!.mvn/wrapper/maven-wrapper.jar
!**/src/main/**/target/
!**/src/test/**/target/
### STS ###
.apt_generated
.classpath
.factorypath
.project
.settings
.springBeans
.sts4-cache
### IntelliJ IDEA ###
.idea
*.iws
*.iml
*.ipr
### NetBeans ###
/nbproject/private/
/nbbuild/
/dist/
/nbdist/
/.nb-gradle/
build/
!**/src/main/**/build/
!**/src/test/**/build/
### VS Code ###
.vscode/

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.mvn/wrapper/maven-wrapper.jar vendored
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2
.mvn/wrapper/maven-wrapper.properties vendored
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distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.5/apache-maven-3.9.5-bin.zip
wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar

15
Dockerfile
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FROM maven:3.6.3-openjdk-17-slim as BUILDER
ARG VERSION=0.0.1-SNAPSHOT
WORKDIR /build/
COPY pom.xml /build/
COPY src /build/src
RUN mvn clean install
COPY target/mailsender-${VERSION}.jar target/application.jar
FROM java:21.0.2-jre-slim
WORKDIR /app/
COPY --from=BUILDER /build/target/application.jar /app/
CMD java -jar /app/application.jar

2
README.md
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# Email_Service

308
mvnw vendored
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#!/bin/sh
# ----------------------------------------------------------------------------
# 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
#
# 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.
# ----------------------------------------------------------------------------
# ----------------------------------------------------------------------------
# Apache Maven Wrapper startup batch script, version 3.2.0
#
# Required ENV vars:
# ------------------
# JAVA_HOME - location of a JDK home dir
#
# Optional ENV vars
# -----------------
# MAVEN_OPTS - parameters passed to the Java VM when running Maven
# e.g. to debug Maven itself, use
# set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
# MAVEN_SKIP_RC - flag to disable loading of mavenrc files
# ----------------------------------------------------------------------------
if [ -z "$MAVEN_SKIP_RC" ] ; then
if [ -f /usr/local/etc/mavenrc ] ; then
. /usr/local/etc/mavenrc
fi
if [ -f /etc/mavenrc ] ; then
. /etc/mavenrc
fi
if [ -f "$HOME/.mavenrc" ] ; then
. "$HOME/.mavenrc"
fi
fi
# OS specific support. $var _must_ be set to either true or false.
cygwin=false;
darwin=false;
mingw=false
case "$(uname)" in
CYGWIN*) cygwin=true ;;
MINGW*) mingw=true;;
Darwin*) darwin=true
# Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
# See https://developer.apple.com/library/mac/qa/qa1170/_index.html
if [ -z "$JAVA_HOME" ]; then
if [ -x "/usr/libexec/java_home" ]; then
JAVA_HOME="$(/usr/libexec/java_home)"; export JAVA_HOME
else
JAVA_HOME="/Library/Java/Home"; export JAVA_HOME
fi
fi
;;
esac
if [ -z "$JAVA_HOME" ] ; then
if [ -r /etc/gentoo-release ] ; then
JAVA_HOME=$(java-config --jre-home)
fi
fi
# For Cygwin, ensure paths are in UNIX format before anything is touched
if $cygwin ; then
[ -n "$JAVA_HOME" ] &&
JAVA_HOME=$(cygpath --unix "$JAVA_HOME")
[ -n "$CLASSPATH" ] &&
CLASSPATH=$(cygpath --path --unix "$CLASSPATH")
fi
# For Mingw, ensure paths are in UNIX format before anything is touched
if $mingw ; then
[ -n "$JAVA_HOME" ] && [ -d "$JAVA_HOME" ] &&
JAVA_HOME="$(cd "$JAVA_HOME" || (echo "cannot cd into $JAVA_HOME."; exit 1); pwd)"
fi
if [ -z "$JAVA_HOME" ]; then
javaExecutable="$(which javac)"
if [ -n "$javaExecutable" ] && ! [ "$(expr "\"$javaExecutable\"" : '\([^ ]*\)')" = "no" ]; then
# readlink(1) is not available as standard on Solaris 10.
readLink=$(which readlink)
if [ ! "$(expr "$readLink" : '\([^ ]*\)')" = "no" ]; then
if $darwin ; then
javaHome="$(dirname "\"$javaExecutable\"")"
javaExecutable="$(cd "\"$javaHome\"" && pwd -P)/javac"
else
javaExecutable="$(readlink -f "\"$javaExecutable\"")"
fi
javaHome="$(dirname "\"$javaExecutable\"")"
javaHome=$(expr "$javaHome" : '\(.*\)/bin')
JAVA_HOME="$javaHome"
export JAVA_HOME
fi
fi
fi
if [ -z "$JAVACMD" ] ; then
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
else
JAVACMD="$(\unset -f command 2>/dev/null; \command -v java)"
fi
fi
if [ ! -x "$JAVACMD" ] ; then
echo "Error: JAVA_HOME is not defined correctly." >&2
echo " We cannot execute $JAVACMD" >&2
exit 1
fi
if [ -z "$JAVA_HOME" ] ; then
echo "Warning: JAVA_HOME environment variable is not set."
fi
# traverses directory structure from process work directory to filesystem root
# first directory with .mvn subdirectory is considered project base directory
find_maven_basedir() {
if [ -z "$1" ]
then
echo "Path not specified to find_maven_basedir"
return 1
fi
basedir="$1"
wdir="$1"
while [ "$wdir" != '/' ] ; do
if [ -d "$wdir"/.mvn ] ; then
basedir=$wdir
break
fi
# workaround for JBEAP-8937 (on Solaris 10/Sparc)
if [ -d "${wdir}" ]; then
wdir=$(cd "$wdir/.." || exit 1; pwd)
fi
# end of workaround
done
printf '%s' "$(cd "$basedir" || exit 1; pwd)"
}
# concatenates all lines of a file
concat_lines() {
if [ -f "$1" ]; then
# Remove \r in case we run on Windows within Git Bash
# and check out the repository with auto CRLF management
# enabled. Otherwise, we may read lines that are delimited with
# \r\n and produce $'-Xarg\r' rather than -Xarg due to word
# splitting rules.
tr -s '\r\n' ' ' < "$1"
fi
}
log() {
if [ "$MVNW_VERBOSE" = true ]; then
printf '%s\n' "$1"
fi
}
BASE_DIR=$(find_maven_basedir "$(dirname "$0")")
if [ -z "$BASE_DIR" ]; then
exit 1;
fi
MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}; export MAVEN_PROJECTBASEDIR
log "$MAVEN_PROJECTBASEDIR"
##########################################################################################
# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
# This allows using the maven wrapper in projects that prohibit checking in binary data.
##########################################################################################
wrapperJarPath="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar"
if [ -r "$wrapperJarPath" ]; then
log "Found $wrapperJarPath"
else
log "Couldn't find $wrapperJarPath, downloading it ..."
if [ -n "$MVNW_REPOURL" ]; then
wrapperUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
else
wrapperUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
fi
while IFS="=" read -r key value; do
# Remove '\r' from value to allow usage on windows as IFS does not consider '\r' as a separator ( considers space, tab, new line ('\n'), and custom '=' )
safeValue=$(echo "$value" | tr -d '\r')
case "$key" in (wrapperUrl) wrapperUrl="$safeValue"; break ;;
esac
done < "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.properties"
log "Downloading from: $wrapperUrl"
if $cygwin; then
wrapperJarPath=$(cygpath --path --windows "$wrapperJarPath")
fi
if command -v wget > /dev/null; then
log "Found wget ... using wget"
[ "$MVNW_VERBOSE" = true ] && QUIET="" || QUIET="--quiet"
if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
wget $QUIET "$wrapperUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
else
wget $QUIET --http-user="$MVNW_USERNAME" --http-password="$MVNW_PASSWORD" "$wrapperUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
fi
elif command -v curl > /dev/null; then
log "Found curl ... using curl"
[ "$MVNW_VERBOSE" = true ] && QUIET="" || QUIET="--silent"
if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
curl $QUIET -o "$wrapperJarPath" "$wrapperUrl" -f -L || rm -f "$wrapperJarPath"
else
curl $QUIET --user "$MVNW_USERNAME:$MVNW_PASSWORD" -o "$wrapperJarPath" "$wrapperUrl" -f -L || rm -f "$wrapperJarPath"
fi
else
log "Falling back to using Java to download"
javaSource="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/MavenWrapperDownloader.java"
javaClass="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/MavenWrapperDownloader.class"
# For Cygwin, switch paths to Windows format before running javac
if $cygwin; then
javaSource=$(cygpath --path --windows "$javaSource")
javaClass=$(cygpath --path --windows "$javaClass")
fi
if [ -e "$javaSource" ]; then
if [ ! -e "$javaClass" ]; then
log " - Compiling MavenWrapperDownloader.java ..."
("$JAVA_HOME/bin/javac" "$javaSource")
fi
if [ -e "$javaClass" ]; then
log " - Running MavenWrapperDownloader.java ..."
("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$wrapperUrl" "$wrapperJarPath") || rm -f "$wrapperJarPath"
fi
fi
fi
fi
##########################################################################################
# End of extension
##########################################################################################
# If specified, validate the SHA-256 sum of the Maven wrapper jar file
wrapperSha256Sum=""
while IFS="=" read -r key value; do
case "$key" in (wrapperSha256Sum) wrapperSha256Sum=$value; break ;;
esac
done < "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.properties"
if [ -n "$wrapperSha256Sum" ]; then
wrapperSha256Result=false
if command -v sha256sum > /dev/null; then
if echo "$wrapperSha256Sum $wrapperJarPath" | sha256sum -c > /dev/null 2>&1; then
wrapperSha256Result=true
fi
elif command -v shasum > /dev/null; then
if echo "$wrapperSha256Sum $wrapperJarPath" | shasum -a 256 -c > /dev/null 2>&1; then
wrapperSha256Result=true
fi
else
echo "Checksum validation was requested but neither 'sha256sum' or 'shasum' are available."
echo "Please install either command, or disable validation by removing 'wrapperSha256Sum' from your maven-wrapper.properties."
exit 1
fi
if [ $wrapperSha256Result = false ]; then
echo "Error: Failed to validate Maven wrapper SHA-256, your Maven wrapper might be compromised." >&2
echo "Investigate or delete $wrapperJarPath to attempt a clean download." >&2
echo "If you updated your Maven version, you need to update the specified wrapperSha256Sum property." >&2
exit 1
fi
fi
MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
# For Cygwin, switch paths to Windows format before running java
if $cygwin; then
[ -n "$JAVA_HOME" ] &&
JAVA_HOME=$(cygpath --path --windows "$JAVA_HOME")
[ -n "$CLASSPATH" ] &&
CLASSPATH=$(cygpath --path --windows "$CLASSPATH")
[ -n "$MAVEN_PROJECTBASEDIR" ] &&
MAVEN_PROJECTBASEDIR=$(cygpath --path --windows "$MAVEN_PROJECTBASEDIR")
fi
# Provide a "standardized" way to retrieve the CLI args that will
# work with both Windows and non-Windows executions.
MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $*"
export MAVEN_CMD_LINE_ARGS
WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
# shellcheck disable=SC2086 # safe args
exec "$JAVACMD" \
$MAVEN_OPTS \
$MAVEN_DEBUG_OPTS \
-classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
"-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

205
mvnw.cmd vendored
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@REM ----------------------------------------------------------------------------
@REM Licensed to the Apache Software Foundation (ASF) under one
@REM or more contributor license agreements. See the NOTICE file
@REM distributed with this work for additional information
@REM regarding copyright ownership. The ASF licenses this file
@REM to you under the Apache License, Version 2.0 (the
@REM "License"); you may not use this file except in compliance
@REM with the License. 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,
@REM software distributed under the License is distributed on an
@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
@REM KIND, either express or implied. See the License for the
@REM specific language governing permissions and limitations
@REM under the License.
@REM ----------------------------------------------------------------------------
@REM ----------------------------------------------------------------------------
@REM Apache Maven Wrapper startup batch script, version 3.2.0
@REM
@REM Required ENV vars:
@REM JAVA_HOME - location of a JDK home dir
@REM
@REM Optional ENV vars
@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
@REM e.g. to debug Maven itself, use
@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
@REM ----------------------------------------------------------------------------
@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
@echo off
@REM set title of command window
title %0
@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
@if "%MAVEN_BATCH_ECHO%" == "on" echo %MAVEN_BATCH_ECHO%
@REM set %HOME% to equivalent of $HOME
if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
@REM Execute a user defined script before this one
if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
@REM check for pre script, once with legacy .bat ending and once with .cmd ending
if exist "%USERPROFILE%\mavenrc_pre.bat" call "%USERPROFILE%\mavenrc_pre.bat" %*
if exist "%USERPROFILE%\mavenrc_pre.cmd" call "%USERPROFILE%\mavenrc_pre.cmd" %*
:skipRcPre
@setlocal
set ERROR_CODE=0
@REM To isolate internal variables from possible post scripts, we use another setlocal
@setlocal
@REM ==== START VALIDATION ====
if not "%JAVA_HOME%" == "" goto OkJHome
echo.
echo Error: JAVA_HOME not found in your environment. >&2
echo Please set the JAVA_HOME variable in your environment to match the >&2
echo location of your Java installation. >&2
echo.
goto error
:OkJHome
if exist "%JAVA_HOME%\bin\java.exe" goto init
echo.
echo Error: JAVA_HOME is set to an invalid directory. >&2
echo JAVA_HOME = "%JAVA_HOME%" >&2
echo Please set the JAVA_HOME variable in your environment to match the >&2
echo location of your Java installation. >&2
echo.
goto error
@REM ==== END VALIDATION ====
:init
@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
@REM Fallback to current working directory if not found.
set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
set EXEC_DIR=%CD%
set WDIR=%EXEC_DIR%
:findBaseDir
IF EXIST "%WDIR%"\.mvn goto baseDirFound
cd ..
IF "%WDIR%"=="%CD%" goto baseDirNotFound
set WDIR=%CD%
goto findBaseDir
:baseDirFound
set MAVEN_PROJECTBASEDIR=%WDIR%
cd "%EXEC_DIR%"
goto endDetectBaseDir
:baseDirNotFound
set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
cd "%EXEC_DIR%"
:endDetectBaseDir
IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
@setlocal EnableExtensions EnableDelayedExpansion
for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
:endReadAdditionalConfig
SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
set WRAPPER_URL="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
IF "%%A"=="wrapperUrl" SET WRAPPER_URL=%%B
)
@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
if exist %WRAPPER_JAR% (
if "%MVNW_VERBOSE%" == "true" (
echo Found %WRAPPER_JAR%
)
) else (
if not "%MVNW_REPOURL%" == "" (
SET WRAPPER_URL="%MVNW_REPOURL%/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
)
if "%MVNW_VERBOSE%" == "true" (
echo Couldn't find %WRAPPER_JAR%, downloading it ...
echo Downloading from: %WRAPPER_URL%
)
powershell -Command "&{"^
"$webclient = new-object System.Net.WebClient;"^
"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
"}"^
"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%WRAPPER_URL%', '%WRAPPER_JAR%')"^
"}"
if "%MVNW_VERBOSE%" == "true" (
echo Finished downloading %WRAPPER_JAR%
)
)
@REM End of extension
@REM If specified, validate the SHA-256 sum of the Maven wrapper jar file
SET WRAPPER_SHA_256_SUM=""
FOR /F "usebackq tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
IF "%%A"=="wrapperSha256Sum" SET WRAPPER_SHA_256_SUM=%%B
)
IF NOT %WRAPPER_SHA_256_SUM%=="" (
powershell -Command "&{"^
"$hash = (Get-FileHash \"%WRAPPER_JAR%\" -Algorithm SHA256).Hash.ToLower();"^
"If('%WRAPPER_SHA_256_SUM%' -ne $hash){"^
" Write-Output 'Error: Failed to validate Maven wrapper SHA-256, your Maven wrapper might be compromised.';"^
" Write-Output 'Investigate or delete %WRAPPER_JAR% to attempt a clean download.';"^
" Write-Output 'If you updated your Maven version, you need to update the specified wrapperSha256Sum property.';"^
" exit 1;"^
"}"^
"}"
if ERRORLEVEL 1 goto error
)
@REM Provide a "standardized" way to retrieve the CLI args that will
@REM work with both Windows and non-Windows executions.
set MAVEN_CMD_LINE_ARGS=%*
%MAVEN_JAVA_EXE% ^
%JVM_CONFIG_MAVEN_PROPS% ^
%MAVEN_OPTS% ^
%MAVEN_DEBUG_OPTS% ^
-classpath %WRAPPER_JAR% ^
"-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" ^
%WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
if ERRORLEVEL 1 goto error
goto end
:error
set ERROR_CODE=1
:end
@endlocal & set ERROR_CODE=%ERROR_CODE%
if not "%MAVEN_SKIP_RC%"=="" goto skipRcPost
@REM check for post script, once with legacy .bat ending and once with .cmd ending
if exist "%USERPROFILE%\mavenrc_post.bat" call "%USERPROFILE%\mavenrc_post.bat"
if exist "%USERPROFILE%\mavenrc_post.cmd" call "%USERPROFILE%\mavenrc_post.cmd"
:skipRcPost
@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
if "%MAVEN_BATCH_PAUSE%"=="on" pause
if "%MAVEN_TERMINATE_CMD%"=="on" exit %ERROR_CODE%
cmd /C exit /B %ERROR_CODE%

77
pom.xml
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@ -1,77 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>3.2.1</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>entgra</groupId>
<artifactId>mailsender</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>mailsender</name>
<description>send a mail for customer with attachments</description>
<properties>
<java.version>21</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.mail</groupId>
<artifactId>javax.mail-api</artifactId>
<version>1.6.2</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.33</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<!-- <version>2.6.4</version>-->
<configuration>
<excludes>
<exclude>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>
</project>

42
src/main/java/entgra/mailsender/Config/AppConfig.java
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@ -1,42 +0,0 @@
package entgra.mailsender.Config;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import java.util.Properties;
@Configuration
public class AppConfig {
@Value("${spring.mail.host}")
private String mailHost;
@Value("${spring.mail.port}")
private String mailPort;
@Value("${spring.mail.username}")
private String mailUsername;
@Value("${spring.mail.password}")
private String mailPassword;
@Bean
public JavaMailSender getJavaMailSender(){
JavaMailSenderImpl javaMailSender = new JavaMailSenderImpl();
javaMailSender.setHost(mailHost);
javaMailSender.setPort(Integer.parseInt(mailPort));
javaMailSender.setUsername(mailUsername);
javaMailSender.setPassword(mailPassword);
Properties props = javaMailSender.getJavaMailProperties();
props.put("mail.smtp.starttls.enable", "true");
return javaMailSender;
}
}

35
src/main/java/entgra/mailsender/Config/DataSourceConfig.java
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@ -1,35 +0,0 @@
package entgra.mailsender.Config;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.jdbc.DataSourceBuilder;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import javax.sql.DataSource;
@Configuration
public class DataSourceConfig {
@Value("${spring.datasource.url}")
private String dbUrl;
@Value("${spring.datasource.username}")
private String dbUserName;
@Value("${spring.datasource.password}")
private String dbPassword;
@Value("${spring.datasource.driver-class-name}")
private String dbDriver;
@Primary
@Bean
public DataSource dataSource(){
return DataSourceBuilder.create()
.url(dbUrl)
.username(dbUserName)
.password(dbPassword)
.driverClassName(dbDriver)
.build();
}
}

47
src/main/java/entgra/mailsender/Controller/MailController.java
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@ -1,47 +0,0 @@
package entgra.mailsender.Controller;
import entgra.mailsender.DTO.MailModel;
import entgra.mailsender.Service.MailService;
import entgra.mailsender.exception.MailException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import javax.mail.MessagingException;
import javax.naming.ServiceUnavailableException;
import java.io.IOException;
import java.sql.SQLException;
@RestController
@RequestMapping("/api/message-distribution/email")
public class MailController {
@Autowired
public MailService mailService;
private static final Logger logger = LoggerFactory.getLogger(MailController.class);
@PostMapping
public ResponseEntity<String> sendEmail(@ModelAttribute MailModel emailModel) {
String msg;
try {
mailService.sendEmail(emailModel);
msg = "Email sent successfully";
return ResponseEntity.ok(msg);
} catch (MailException e) {
msg = "Invalid email address";
logger.error(msg, e);
return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(msg);
} catch (MessagingException | SQLException | IOException | ServiceUnavailableException exception) {
msg = "Failed to send email";
logger.error(msg, exception);
return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(msg + exception);
}
}
}

198
src/main/java/entgra/mailsender/DAO/Impl/MailDAOImpl.java
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@ -1,198 +0,0 @@
package entgra.mailsender.DAO.Impl;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.ObjectMapper;
import entgra.mailsender.DAO.MailDAO;
import entgra.mailsender.DTO.MailModel;
import entgra.mailsender.exception.DatabaseAccessException;
import entgra.mailsender.exception.FileConversionException;
import entgra.mailsender.exception.MailProcessingException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import javax.sql.DataSource;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.sql.SQLException;
import java.sql.PreparedStatement;
import java.sql.Connection;
import java.sql.Timestamp;
import java.sql.Types;
import java.sql.ResultSet;
import java.sql.Blob;
import java.sql.Date;
import java.time.LocalDate;
import java.util.ArrayList;
import java.util.List;
@Component
public class MailDAOImpl implements MailDAO {
private static final Logger logger = LoggerFactory.getLogger(MailDAOImpl.class);
private DataSource dataSource;
public MailDAOImpl(DataSource dataSource) {
this.dataSource = dataSource;
}
@Override
public int addMail(MailModel mailModel) throws SQLException {
try {
PreparedStatement stmt;
Connection conn = dataSource.getConnection();
stmt = conn.prepareStatement("INSERT INTO EMAIL (EMAIL_ADDRESS, MSG_TEMPLATE, PRIORITY, ATTACHMENT," +
" PARAMETERS, TIME, FILENAME, EXPIRY_AT,UUID) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)",
PreparedStatement.RETURN_GENERATED_KEYS);
Timestamp current_time = new Timestamp(System.currentTimeMillis());
String parametersJson = new ObjectMapper().writeValueAsString(mailModel.getParameters());
stmt.setString(1, mailModel.getEmailAddress());
stmt.setString(2, mailModel.getMsgTemplate());
stmt.setInt(3, mailModel.getPriority());
// Set attachment only if it is present
if (mailModel.getAttachment() != null) {
stmt.setBytes(4, mailModel.getAttachment().getBytes());
} else {
stmt.setNull(4, Types.BLOB);
}
stmt.setString(5, parametersJson);
stmt.setTimestamp(6, current_time);
if (mailModel.getAttachment() != null) {
String filename = mailModel.getAttachment().getOriginalFilename();
stmt.setString(7, filename);
} else {
stmt.setNull(7, Types.VARCHAR);
}
stmt.setDate(8, mailModel.getExpiry_at());
stmt.setString(9, mailModel.getUuId());
stmt.executeUpdate();
} catch (SQLException e) {
logger.info(e.getMessage());
throw new SQLException("error processing sql !!", e);
} catch (IOException e) {
logger.info(e.getMessage());
throw new MailProcessingException("Error processing mailModel", e);
}
return 0;
}
@Override
public List<MailModel> getUnsentMessages() {
String sql = "SELECT E.* FROM EMAIL E LEFT JOIN SENTEMAIL SE ON E.UUID = SE.UUID WHERE SE.UUID IS NULL AND" +
"(E.EXPIRY_AT IS NULL OR E.EXPIRY_AT > CURRENT_DATE)";
List<MailModel> unsentMails = new ArrayList<>();
try (Connection connection = dataSource.getConnection();
PreparedStatement statement = connection.prepareStatement(sql);
ResultSet rs = statement.executeQuery()) {
while (rs.next()) {
MailModel mailModel = new MailModel();
mailModel.setUuId(rs.getString("UUID"));
mailModel.setPriority(rs.getInt("PRIORITY"));
mailModel.setExpiry_at(rs.getDate("EXPIRY_AT"));
unsentMails.add(mailModel);
}
} catch (SQLException e) {
logger.info(e.getMessage());
throw new DatabaseAccessException("Error accessing database", e);
}
return unsentMails;
}
@Override
public MailModel getMailDetails(String uuId) {
String sql = "SELECT * FROM EMAIL WHERE UUID = ?";
MailModel mailModel = new MailModel();
try {
Connection conn = dataSource.getConnection();
try (PreparedStatement stmt = conn.prepareStatement(sql)) {
stmt.setString(1, uuId);
try (ResultSet rs = stmt.executeQuery()) {
while (rs.next()) {
mailModel.setEmailId(rs.getInt("EMAIL_ID"));
mailModel.setUuId(rs.getString("UUID"));
mailModel.setEmailAddress(rs.getString("EMAIL_ADDRESS"));
mailModel.setMsgTemplate(rs.getString("MSG_TEMPLATE"));
mailModel.setPriority(rs.getInt("PRIORITY"));
String jsonData = rs.getString("PARAMETERS");
List<MailModel.Parameter> parameters = parseJsonParameters(jsonData);
mailModel.setParameters(parameters);
if (rs.getString("FILENAME") != null) {
String filename = rs.getString("FILENAME");
mailModel.setFilename(filename);
Blob blob = rs.getBlob("ATTACHMENT");
File file = convertBlobToFile(blob, filename);
mailModel.setFile(file);
}
}
return mailModel;
} catch (IOException e) {
logger.info(e.getMessage());
throw new MailProcessingException("Error processing mail", e);
}
}
} catch (SQLException e) {
logger.info(e.getMessage());
throw new DatabaseAccessException("Error accessing database", e);
}
}
private List<MailModel.Parameter> parseJsonParameters(String parametersJson) {
try {
ObjectMapper objectMapper = new ObjectMapper();
return objectMapper.readValue(parametersJson, new TypeReference<>() {
});
} catch (IOException e) {
logger.info(e.getMessage());
throw new IllegalArgumentException("Error parsing parameters JSON", e);
}
}
public static File convertBlobToFile(Blob blob, String fileName) throws IOException, SQLException {
File file = new File(fileName);
try (FileOutputStream outputStream = new FileOutputStream(file)) {
InputStream inputStream = blob.getBinaryStream();
byte[] buffer = new byte[1024];
while (inputStream.read(buffer) > 0) {
outputStream.write(buffer);
}
} catch (IOException e) {
logger.info(e.getMessage());
throw new FileConversionException("Error converting Blob to File", e);
}
return file;
}
public void addToSentMail(String uuId) {
try {
PreparedStatement stmt;
Connection connection = dataSource.getConnection();
stmt = connection.prepareStatement("INSERT INTO SENTEMAIL (UUID,SENT_TIME) VALUE (?,?)");
stmt.setString(1, uuId);
stmt.setDate(2, Date.valueOf(LocalDate.now()));
stmt.execute();
} catch (SQLException e) {
logger.info(e.getMessage());
throw new DatabaseAccessException("Error accessing database", e);
}
}
}

18
src/main/java/entgra/mailsender/DAO/MailDAO.java
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@ -1,18 +0,0 @@
package entgra.mailsender.DAO;
import entgra.mailsender.DTO.MailModel;
import java.sql.SQLException;
import java.util.List;
public interface MailDAO {
int addMail(MailModel mailModel) throws SQLException;
MailModel getMailDetails(String uuId);
void addToSentMail(String uuId);
List<MailModel> getUnsentMessages();
}

53
src/main/java/entgra/mailsender/DTO/MailModel.java
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@ -1,53 +0,0 @@
package entgra.mailsender.DTO;
import lombok.AllArgsConstructor;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
import org.springframework.web.multipart.MultipartFile;
import java.io.File;
import java.util.List;
import java.util.PrimitiveIterator;
@Getter
@Setter
@AllArgsConstructor
@NoArgsConstructor
public class MailModel {
private int emailId;
private String emailAddress;
private String msgTemplate;
private int priority;
private List<Parameter> parameters;
private MultipartFile attachment;
private File file;
private String filename;
private java.sql.Date expiry_at;
private long insertionOrder;
private String uuId;
@Setter
@Getter
public static class Parameter{
private String key;
private String value;
public Parameter(){
}
public Parameter(String key, String value){
this.key = key;
this.value = value;
}
}
}

22
src/main/java/entgra/mailsender/MailsenderApplication.java
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@ -1,22 +0,0 @@
package entgra.mailsender;
import entgra.mailsender.Service.MailService;
import jakarta.annotation.PostConstruct;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class MailsenderApplication {
@Autowired
private MailService mailService;
public static void main(String[] args) {
SpringApplication.run(MailsenderApplication.class, args);
}
@PostConstruct
public void init(){
mailService.syncMailWithDB();
}
}

74
src/main/java/entgra/mailsender/Service/Impl/MailQueueServiceImpl.java
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@ -1,74 +0,0 @@
package entgra.mailsender.Service.Impl;
import entgra.mailsender.Controller.MailController;
import entgra.mailsender.DAO.MailDAO;
import entgra.mailsender.DTO.MailModel;
import entgra.mailsender.Service.MailQueueService;
import entgra.mailsender.util.PriorityQueueHolder;
import lombok.RequiredArgsConstructor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
import java.util.Set;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.atomic.AtomicLong;
@Service
@RequiredArgsConstructor
public class MailQueueServiceImpl implements MailQueueService {
private static final Logger logger = LoggerFactory.getLogger(MailQueueServiceImpl.class);
@Autowired
MailDAO mailDAO;
private volatile Thread processingThread;
private volatile boolean isProcessingMails;
@Override
public void enqueMails(List<MailModel> mailModelList){
BlockingQueue<MailModel> priorityQueue = PriorityQueueHolder.getInstance().getPriorityQueue();
AtomicLong insertionOrderCounter = PriorityQueueHolder.getInstance().getInsertionOrderCounter();
Set<MailModel> uniqueMails = PriorityQueueHolder.getInstance().getUniqueMails();
for (MailModel mailModel : mailModelList){
if (!PriorityQueueHolder.getInstance().getUniqueMails().contains(mailModel)){
mailModel.setInsertionOrder(insertionOrderCounter.getAndIncrement());
priorityQueue.add(mailModel);
uniqueMails.add(mailModel);
}
}
}
public MailModel getHighPriorityMail(){
BlockingQueue<MailModel> priorityQueue = PriorityQueueHolder.getInstance().getPriorityQueue();
Set<MailModel> uniqueMails = PriorityQueueHolder.getInstance().getUniqueMails();
if (PriorityQueueHolder.getInstance().getPriorityQueue().peek() != null){
MailModel mailModel = priorityQueue.poll();
uniqueMails.remove(mailModel);
return mailModel;
}
return null;
}
public void clearOnServerShutdown(){
BlockingQueue<MailModel> priorityQueue = PriorityQueueHolder.getInstance().getPriorityQueue();
if (processingThread != null){
while (isProcessingMails){
try {
Thread.sleep(1000);
}catch (InterruptedException e){
Thread.currentThread().interrupt();
logger.info("Error waiting for the processing cycle to complete" + e.getMessage());
}
isProcessingMails = priorityQueue.peek() != null;
}
processingThread.interrupt();
}
logger.info("Server shutdown");
}
}

177
src/main/java/entgra/mailsender/Service/Impl/MailServiceImpl.java
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@ -1,177 +0,0 @@
package entgra.mailsender.Service.Impl;
import entgra.mailsender.DAO.MailDAO;
import entgra.mailsender.DTO.MailModel;
import entgra.mailsender.Service.MailQueueService;
import entgra.mailsender.Service.MailService;
import entgra.mailsender.exception.BadRequestException;
import entgra.mailsender.exception.MailException;
import entgra.mailsender.exception.QueueException;
import entgra.mailsender.util.PriorityQueueHolder;
import jakarta.annotation.PreDestroy;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Service;
import javax.naming.ServiceUnavailableException;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import java.util.UUID;
@Service
public class MailServiceImpl implements MailService {
private static final Logger logger = LoggerFactory.getLogger(MailServiceImpl.class);
private volatile boolean shutdownRequested = false;
@Autowired
private MailQueueService mailQueueService;
@PreDestroy
public void shutdown() {
shutdownRequested = true;
mailQueueService.clearOnServerShutdown();
}
@Autowired
private JavaMailSender javaMailSender;
@Autowired
private MailDAO mailDAO;
public void sendEmail(MailModel emailModel) throws MailException, SQLException, ServiceUnavailableException {
if (shutdownRequested) {
String msg = "Server is shutting down. Mail requests will not be accepted.";
logger.info(msg);
throw new ServiceUnavailableException(msg);
}
if (isValidEmailAddress(emailModel.getEmailAddress())) {
String msg = "Invalid Email address";
logger.warn(msg);
throw new BadRequestException(msg);
}
if (emailModel.getMsgTemplate().isBlank()) {
String msg = "Empty message template";
logger.warn(msg);
throw new BadRequestException(msg);
}
//generating the uuid
emailModel.setUuId(String.valueOf(UUID.randomUUID()));
mailDAO.addMail(emailModel); // save the mail details in the database and get the auto generated id
if (emailModel.getAttachment() != null) {
emailModel.setFilename(emailModel.getAttachment().getOriginalFilename());
}
//add to the priority queue
List<MailModel> mailModels = new ArrayList<>();
mailModels.add(emailModel);
try {
mailQueueService.enqueMails(mailModels);
} catch (Exception e) {
logger.info(e.getMessage());
throw new QueueException("Error processing Queue", e);
}
//send the high priority mail
while (PriorityQueueHolder.getInstance().getPriorityQueue().peek() != null) {
MailModel prioritizedMail = mailQueueService.getHighPriorityMail();
javaMailSender.send(mimeMessage -> {
MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage, true);
mimeMessageHelper.setTo(prioritizedMail.getEmailAddress());
mimeMessageHelper.setSubject("Bill details for March ");
StringBuilder emailBody = new StringBuilder();
emailBody.append(prioritizedMail.getMsgTemplate()).append("\n");
// Append parameters to email body
List<MailModel.Parameter> parameters = prioritizedMail.getParameters();
for (MailModel.Parameter parameter : parameters) {
emailBody.append("\n").append(parameter.getKey()).append(": ").append(parameter.getValue());
}
// Append text to email body
mimeMessageHelper.setText(emailBody.toString(), false);
// Append attachments to email body
if (prioritizedMail.getAttachment() != null) {
mimeMessageHelper.addAttachment(prioritizedMail.getFilename(), prioritizedMail.getAttachment());
}
//Store the sent mail to the table
mailDAO.addToSentMail(prioritizedMail.getUuId());
});
}
}
public boolean isValidEmailAddress(String email) {
String regex = "^[a-zA-Z0-9_+&*-]+(?:\\.[a-zA-Z0-9_+&*-]+)*@(?:[a-zA-Z0-9-]+\\.)+[a-zA-Z]{2,7}$";
return !email.matches(regex);
}
public void syncMailWithDB() {
try {
List<MailModel> mailModels = mailDAO.getUnsentMessages();
if (!mailModels.isEmpty()) {
mailQueueService.enqueMails(mailModels);
}
} catch (Exception e) {
logger.info(e.getMessage());
throw new QueueException("Error processing Queue", e);
}
while (PriorityQueueHolder.getInstance().getPriorityQueue().peek() != null) {
MailModel prioritizedMail = mailDAO.getMailDetails(mailQueueService.getHighPriorityMail().getUuId());
javaMailSender.send(mimeMessage -> {
MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage, true);
mimeMessageHelper.setTo(prioritizedMail.getEmailAddress());
mimeMessageHelper.setSubject("Bill details for March ");
StringBuilder emailBody = new StringBuilder();
emailBody.append(prioritizedMail.getMsgTemplate()).append("\n");
// Append parameters to email body
List<MailModel.Parameter> parameters = prioritizedMail.getParameters();
for (MailModel.Parameter parameter : parameters) {
emailBody.append("\n").append(parameter.getKey()).append(": ").append(parameter.getValue());
}
// Append text to email body
mimeMessageHelper.setText(emailBody.toString(), false);
// Append attachments to email body
if (prioritizedMail.getAttachment() != null) {
mimeMessageHelper.addAttachment(prioritizedMail.getFilename(), prioritizedMail.getFile());
}
//Store the sent mail to the table
mailDAO.addToSentMail(prioritizedMail.getUuId());
}
);
}
}
}

15
src/main/java/entgra/mailsender/Service/MailQueueService.java
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@ -1,15 +0,0 @@
package entgra.mailsender.Service;
import entgra.mailsender.DTO.MailModel;
import java.util.List;
public interface MailQueueService {
void enqueMails(List<MailModel> mailModelList);
MailModel getHighPriorityMail();
void clearOnServerShutdown();
}

22
src/main/java/entgra/mailsender/Service/MailService.java
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@ -1,22 +0,0 @@
package entgra.mailsender.Service;
import entgra.mailsender.DTO.MailModel;
import entgra.mailsender.exception.BadRequestException;
import entgra.mailsender.exception.MailException;
import javax.mail.MessagingException;
import javax.naming.ServiceUnavailableException;
import java.io.IOException;
import java.sql.SQLException;
public interface MailService {
void sendEmail(MailModel emailModel) throws MessagingException, IOException, MailException, SQLException, ServiceUnavailableException;
boolean isValidEmailAddress(String email);
void syncMailWithDB();
}

10
src/main/java/entgra/mailsender/exception/BadRequestException.java
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@ -1,10 +0,0 @@
package entgra.mailsender.exception;
public class BadRequestException extends MailException{
public BadRequestException(String message, Throwable ex){ super(message, ex);}
public BadRequestException(String message) {
super(message);
}
}

11
src/main/java/entgra/mailsender/exception/DatabaseAccessException.java
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@ -1,11 +0,0 @@
package entgra.mailsender.exception;
public class DatabaseAccessException extends RuntimeException{
public DatabaseAccessException(String message) {
super(message);
}
public DatabaseAccessException(String message, Throwable cause) {
super(message, cause);
}
}

11
src/main/java/entgra/mailsender/exception/FileConversionException.java
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@ -1,11 +0,0 @@
package entgra.mailsender.exception;
public class FileConversionException extends RuntimeException{
public FileConversionException(String message) {
super(message);
}
public FileConversionException(String message, Throwable cause) {
super(message, cause);
}
}

30
src/main/java/entgra/mailsender/exception/MailException.java
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@ -1,30 +0,0 @@
package entgra.mailsender.exception;
import lombok.Data;
@Data
public class MailException extends Exception{
private String errorMessage;
public MailException(){super();}
public MailException(Throwable cause) {
super(cause);
}
public MailException(String msg, Exception nestedEx) {
super(msg, nestedEx);
setErrorMessage(msg);
}
public MailException(String message, Throwable cause) {
super(message, cause);
setErrorMessage(message);
}
public MailException(String msg) {
super(msg);
setErrorMessage(msg);
}
}

11
src/main/java/entgra/mailsender/exception/MailProcessingException.java
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@ -1,11 +0,0 @@
package entgra.mailsender.exception;
public class MailProcessingException extends RuntimeException{
public MailProcessingException(String msg){
super(msg);
}
public MailProcessingException(String msg, Throwable cause){
super(msg,cause);
}
}

11
src/main/java/entgra/mailsender/exception/QueueException.java
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@ -1,11 +0,0 @@
package entgra.mailsender.exception;
public class QueueException extends RuntimeException{
public QueueException(String message){
super(message);
}
public QueueException(String message, Throwable cause) {
super(message, cause);
}
}

32
src/main/java/entgra/mailsender/util/PriorityQueueHolder.java
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@ -1,32 +0,0 @@
package entgra.mailsender.util;
import entgra.mailsender.DTO.MailModel;
import lombok.Getter;
import java.util.Comparator;
import java.util.Set;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.PriorityBlockingQueue;
import java.util.concurrent.atomic.AtomicLong;
public class PriorityQueueHolder {
// Singleton instance
@Getter
private static final PriorityQueueHolder instance = new PriorityQueueHolder();
@Getter
private final AtomicLong insertionOrderCounter = new AtomicLong(1);
// PriorityBlockingQueue is thread-safe and supports ordering elements based on their natural order or a
//custom comparator.
@Getter
private final BlockingQueue<MailModel> priorityQueue = new PriorityBlockingQueue<>(100, Comparator
.comparingLong(MailModel::getPriority)
.thenComparing(MailModel::getExpiry_at)
.thenComparing(MailModel::getInsertionOrder));
@Getter
private final Set<MailModel> uniqueMails = ConcurrentHashMap.newKeySet();
}

12
src/main/resources/application.properties
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@ -1,12 +0,0 @@
spring.mail.host=smtp.gmail.com
spring.mail.port=587
spring.mail.username=chandrasegar@entgra.io
spring.mail.password=kfgt idre luvt ismk
spring.datasource.url=jdbc:mysql://localhost:3306/email_sending
spring.datasource.username=root
spring.datasource.password=StrongPassword123!
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

13
src/test/java/entgra/mailsender/MailsenderApplicationTests.java
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@ -1,13 +0,0 @@
package entgra.mailsender;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
@SpringBootTest
class MailsenderApplicationTests {
@Test
void contextLoads() {
}
}
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