定時cronjob調用Java程式

定時cronjob調用Java程式

一個部署在linux環境的Java公司專屬應用程式後台經常會在大半夜運行很多定時的任務，本篇文章總結下如何使用shell指令碼調用Java程式，以備忘。

1. setupenv.sh

 

export APP_HOME=`pwd`if [ -z "$JAVA_HOME" ] ; then  JAVA=`which java`  if [ -z "$JAVA" ] ; then    echo "Cannot find JAVA. Please set your PATH."    exit 1  fi  JAVA_BIN=`dirname $JAVA`  JAVA_HOME=$JAVA_BIN/..fiPATH_SEPARATOR=':'if [ $OSTYPE = "cygwin32" ] ; then   PATH_SEPARATOR=';'fiif [ $OSTYPE = "cygwin" ] ; then   PATH_SEPARATOR=';'fiJAVA=$JAVA_HOME/bin/javaCLASSPATH=$JAVA_HOME/lib/tools.jarCLASSPATH=`echo ${APP_HOME}/lib/*.jar | tr ' ' ${PATH_SEPARATOR}`${PATH_SEPARATOR}${CLASSPATH}CLASSPATH=`echo ${APP_HOME}/lib/*.zip | tr ' ' ${PATH_SEPARATOR}`${PATH_SEPARATOR}${CLASSPATH}CLASSPATH=`echo ${ANT_HOME}/lib/*.jar | tr ' ' ${PATH_SEPARATOR}`${PATH_SEPARATOR}${CLASSPATH}CLASSPATH=`echo ${ANT_HOME}/lib/*.zip | tr ' ' ${PATH_SEPARATOR}`${PATH_SEPARATOR}${CLASSPATH}CLASSPATH=${APP_HOME}/build/classes${PATH_SEPARATOR}${CLASSPATH}export CLASSPATH### load other variables from profilesource /etc/profile #set all env

2. app.sh

 

#!/bin/sh# -----------------------------------------------------------------------------# app.sh - Script to run applications## Environment Variable Prequisites##   APP_HOME (Optional) May point at your APP "build" directory.#                 If not present, the current working directory is assumed.#   APP_OPTS (Optional) Java runtime options used when the "start",#                 "stop", or "run" command is executed.#   JAVA_HOME     Must point at your Java Development Kit installation.# -----------------------------------------------------------------------------# ----- Checking JVM variables -------------------------export JAVA_PARAM=$1if [ "$JAVA_PARAM" = "-javaMax" ]then    shift    export memoryX=$1    shiftelse    export memoryX="1024"fiexport JAVA_PARAM=$1if [ "$JAVA_PARAM" = "-jmxHost" ]then    shift    jmxHost=$1    shiftfiexport JAVA_PARAM=$1if [ "$JAVA_PARAM" = "-jmxPort" ]then    shift    jmxPort=$1    shiftfi# fix env. issuessource /etc/profile# ----- Verify and Set Required Environment Variables -------------------------export LANG="en_US.UTF8"    if [ -z "$APP_HOME" ] ; then    ## resolve links - $0 may be a link to  home    PRG=$0    progname=`basename $0`    while [ -h "$PRG" ] ; dols=`ls -ld "$PRG"`link=`expr "$ls" : '.*-> \(.*\)$'`    if expr "$link" : '.*/.*' > /dev/null; then    PRG="$link"else    PRG="`dirname $PRG`/$link"fi    done        APP_HOME_1=`dirname "$PRG"`/../..    echo "Guessing APP_HOME from app.sh to ${APP_HOME_1}"     if [ -d ${APP_HOME_1}/properties ] ; then     APP_HOME=${APP_HOME_1}    echo "Setting APP_HOME to $APP_HOME"fi    fi    if [ -z "$APP_OPTS" ] ; then    APP_OPTS=""    fi    if [ -z "$JPDA_OPTS" ] ; then    JPDA_OPTS="-Xdebug -Xnoagent -Xrunjdwp:transport=dt_socket,address=8000,server=y,suspend=n"    fi    if [ -z "$JAVA_HOME" ] ; thenecho You must set JAVA_HOME to point at your Java Development Kit installation    exit 1fi# ----- Cygwin Unix Paths Setup -----------------------------------------------# Cygwin support.  $cygwin _must_ be set to either true or false.case "`uname`" in  CYGWIN*) cygwin=true ;;  *) cygwin=false ;;esac # For Cygwin, ensure paths are in UNIX format before anything is touchedif $cygwin ; then  [ -n "$APP_HOME" ] &&    APP_HOME=`cygpath --unix "$APP_HOME"`    [ -n "$JAVA_HOME" ] &&    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`fi# ----- Set Up The Classpath -------------------------------------------CP=${APP_HOME}/build/classesCP=`echo ${APP_HOME}/lib/*.jar | tr ' ' :`:${CP}CP=`echo ${APP_HOME}/lib/*.zip | tr ' ' :`:${CP}if [ -f "$JAVA_HOME/lib/tools.jar" ] ; then  CP=$CP:"$JAVA_HOME/lib/tools.jar"fi# ----- Cygwin Windows Paths Setup --------------------------------------------# convert the existing path to windowsif $cygwin ; then   CP=`cygpath --path --windows "$CP"`   APP_HOME=`cygpath --path --windows "$APP_HOME"`   JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`fi# ----- Execute The Requested Command -----------------------------------------echo "Using CLASSPATH:     $CP"echo "Using APP_HOME: $APP_HOME"echo "Using JAVA_HOME:     $JAVA_HOME"JMX_OPTS=""if [ "$jmxHost" != "" ]then    JMX_OPTS=" -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote -Djava.rmi.server.hostname="$jmxHostfiif [ "$jmxPort" != "" ]then    JMX_OPTS=$JMX_OPTS" -Dcom.sun.management.jmxremote.port="$jmxPortfiexport JAVA_OPTS="-verbosegc -XX:+PrintGCDetails -XX:+PrintTenuringDistribution"JAVA_OPTS=$JAVA_OPTS" "-server" "-Xms256M" "-Xmx$memoryX"M "-XX:NewSize=128m" "-XX:MaxNewSize=128m" "-XX:+UseConcMarkSweepGC" "-Xconcurrentio" "-Xnoclassgc"" JAVA_OPTS=$JAVA_OPTS" "$JMX_OPTSJAVA_OPTS=$JAVA_OPTS" "-Doracle.jdbc.V8Compatible=true$JAVA_HOME/bin/java ${JAVA_OPTS} $APP_OPTS -classpath $CP -Dapp.base=$APP_BASE  -Dapp.home=$APP_HOME -Djava.library.path=$HOME/JMagick/lib $@

3. runMyJob.sh

 

#!/bin/sh#=============================================================================# Desc   : MyJob# 00 03 * * * /home/app/src/scripts/runMyJob.sh 0 >> /home/app/runMyJob0.log 2>&1#=============================================================================export APP_HOME=$HOME/appcd $HOME. .bashrccd $APP_HOME. setupenv.shLOCKFILE="$HOME/MyJob$1.lock";CONCURRENT_WARNING="MyJob lock file found: $LOCKFILE \n Probably a previous job is still executing, please wait for a while and try again later. \n";init_day=`date +%Y%m%d%H%M`;logfile="$HOME/MyJob$1_$init_day.log";if [ -f $LOCKFILE ]then    echo "$CONCURRENT_WARNING";    exit 1;fi#create a lock file to prevent concurrent job requeststouch $LOCKFILEecho ">>>>>START at `date`"echo ">>> execute the business ...."$APP_HOME/src/scripts/app.sh -javaMax 2049 com.zdp.MyJob $1 >> $logfile 2>&1echo ">>> $1 ....  "#gzip log filegzip $logfile;#move the log to the logs directorycd $HOMEmv $logfile.gz $HOME/logs/# remove lock filerm -rf $LOCKFILEecho ">>>>> END at `date`"

4. Java程式：MyJob.java

package com.zdp;public class MyJob {    private static String MODE = "0";public static void main(String args[]) throws Exception {try {System.out.println("----------------- START -----------------");long begin = System.currentTimeMillis();if (args.length > 0) {MODE = args[0];}// main logiclong end = System.currentTimeMillis();System.out.println("<<<<<<<<<<<<<<<<<<<<  Total spent time: " + (end - begin) / 1000 + "s  >>>>>>>>>>>>>>>>>>>>");System.out.println("----------------- END -------------------");} catch (Exception e) {logger.error(e.getMessage(), e); System.exit(1);} finally{System.exit(0);}}}