tomcat啓動分析（2）
1 - 概述
腳本catalina.sh用於啓動和關閉tomcat服務器，是最關鍵的腳本
另外的腳本startup.sh和shutdown.sh都是使用不一樣的參數調用了該腳本
該腳本的使用方法以下（引自該腳本自己）：
java
echo "Usage: catalina.sh ( commands ... )" echo "commands:" echo " debug Start Catalina in a debugger" echo " debug -security Debug Catalina with a security manager" echo " embedded Start Catalina in embedded mode" echo " jpda start Start Catalina under JPDA debugger" echo " run Start Catalina in the current window" echo " run -security Start in the current window with security manager" echo " start Start Catalina in a separate window" echo " start -security Start in a separate window with security manager" echo " stop Stop Catalina"
echo "Usage: catalina.sh ( commands ... )" echo "commands:" echo " debug Start Catalina in a debugger" echo " debug -security Debug Catalina with a security manager" echo " embedded Start Catalina in embedded mode" echo " jpda start Start Catalina under JPDA debugger" echo " run Start Catalina in the current window" echo " run -security Start in the current window with security manager" echo " start Start Catalina in a separate window" echo " start -security Start in a separate window with security manager" echo " stop Stop Catalina"
2 - 腳本分析
#!/bin/sh# =============================================================
# 該腳本設置正確的環境變量和系統信息，而後啓動或者中止tomcat server
# 具體的操做是：
# 使用命令行參數做爲args的實參，調用org.apache.catalina.startup.Bootstrap.main(String[])
# ==============================================================# -----------------------------------------------------------------------------
# Start/Stop Script for the CATALINA Server
#
# Environment Variable Prequisites
#
# CATALINA_HOME May point at your Catalina "build" directory.
#
# CATALINA_BASE (Optional) Base directory for resolving dynamic portions
# of a Catalina installation. If not present, resolves to
# the same directory that CATALINA_HOME points to.
#
# CATALINA_OPTS (Optional) Java runtime options used when the "start",
# "stop", or "run" command is executed.
#
# CATALINA_TMPDIR (Optional) Directory path location of temporary directory
# the JVM should use (java.io.tmpdir). Defaults to
# $CATALINA_BASE/temp.
#
# JAVA_HOME Must point at your Java Development Kit installation.
#
# JAVA_OPTS (Optional) Java runtime options used when the "start",
# "stop", or "run" command is executed.
#
# JPDA_TRANSPORT (Optional) JPDA transport used when the "jpda start"
# command is executed. The default is "dt_socket".
#
# JPDA_ADDRESS (Optional) Java runtime options used when the "jpda start"
# command is executed. The default is 8000.
#
# JSSE_HOME (Optional) May point at your Java Secure Sockets Extension
# (JSSE) installation, whose JAR files will be added to the
# system class path used to start Tomcat.
#
# CATALINA_PID (Optional) Path of the file which should contains the pid
# of catalina startup java process, when start (fork) is used
# -----------------------------------------------------------------------------# OS specific support. $var _must_ be set to either true or false.cygwin=false
case "`uname`" in
CYGWIN*) cygwin=true;;
esac# PRG是被執行的腳本的名稱，能夠認爲PRG=="catalina.sh"，也多是某個符號鏈，指向該腳本。PRG="$0"# 處理了一下PRG，等循環跳出以後PRG成爲 ????while [ -h "$PRG" ]; do
ls=`ls -ld "$PRG"`
link=`expr "$ls" : '.*-> /(.*/)$'`
if expr "$link" : '.*/.*' > /dev/null; then
PRG="$link"
else
PRG=`dirname "$PRG"`/"$link"
fi
done# PRGDIR是PRG的目錄路徑名稱PRGDIR=`dirname "$PRG"`# 執行$CATALINA_HOME/BIN/setenv.sh來設置環境變量
# [ -r filename ] 是判斷是否文件存在且可讀CATALINA_HOME=`cd "$PRGDIR/.." ; pwd`
if [ -r "$CATALINA_HOME"/bin/setenv.sh ]; then
. "$CATALINA_HOME"/bin/setenv.sh
fi# For Cygwin, 確保全部的路徑名都符合UNIX格式if $cygwin; then
[ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
[ -n "$CATALINA_HOME" ] && CATALINA_HOME=`cygpath --unix "$CATALINA_HOME"`
[ -n "$CATALINA_BASE" ] && CATALINA_BASE=`cygpath --unix "$CATALINA_BASE"`
[ -n "$CLASSPATH" ] && CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
[ -n "$JSSE_HOME" ] && JSSE_HOME=`cygpath --path --unix "$JSSE_HOME"`
fi# 設置用來初始化SystemClassLoader的CLASSPATH變量：經過執行腳本setclasspath.sh完成
# 注意：腳本setclasspath.sh改變了原來的$CLASSPATH變量，而把它設爲：
# CLASSPATH=$CATALINA_HOME/bin/bootstrap.jar:$JAVA_HOME/lib/tools.jar
# 其中bootstrap.jar是package org.apache.catalina.startup的打包文件，
# 含有啓動方法org.apache.catalina.startup.Bootstrap.main(String[] args)
# tools.jar含有javac編譯器，用來把jsp文件編譯成爲servlet classif [ -r "$CATALINA_HOME"/bin/setclasspath.sh ]; then
BASEDIR="$CATALINA_HOME"
. "$CATALINA_HOME"/bin/setclasspath.sh
else
echo "Cannot find $CATALINA_HOME/bin/setclasspath.sh"
echo "This file is needed to run this program"
exit 1
fi# 在CLASSPATH環境變量後面補上一些JAR文件
# [ -n string ] 判斷字符串是否長度非0；[ -z string ] 判斷字符串是否長度爲0
# 它們能夠用來判斷是否某個環境變量已經被設置if [ -n "$JSSE_HOME" ]; then
CLASSPATH="$CLASSPATH":"$JSSE_HOME"/lib/jcert.jar:"$JSSE_HOME"/lib/jnet.jar:"$JSSE_HOME"/lib/jsse.jar
fi
CLASSPATH="$CLASSPATH":"$CATALINA_HOME"/bin/bootstrap.jar# 指定CATALINA_BASE變量
# 若是CATALINA_BASE沒有值，就讓CATALINA_BASE=$CATALINA_HOMEif [ -z "$CATALINA_BASE" ] ; then
CATALINA_BASE="$CATALINA_HOME"
fi# 指定CATALINA_TMPDIR變量
# 若是CATALINA_TMPDIR沒有值，就讓CATALINA_TMPDIR=$CATALINA_BASE/tempif [ -z "$CATALINA_TMPDIR" ] ; then
# Define the java.io.tmpdir to use for Catalina
CATALINA_TMPDIR="$CATALINA_BASE"/temp
fi# For Cygwin, 在執行java程序前把路徑名轉換成WINDOWS格式if $cygwin; then
JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
CATALINA_HOME=`cygpath --path --windows "$CATALINA_HOME"`
CATALINA_BASE=`cygpath --path --windows "$CATALINA_BASE"`
CATALINA_TMPDIR=`cygpath --path --windows "$CATALINA_TMPDIR"`
CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
JSSE_HOME=`cygpath --path --windows "$JSSE_HOME"`
fi# 顯示信息，而後執行命令
echo "Using CATALINA_BASE: $CATALINA_BASE"
echo "Using CATALINA_HOME: $CATALINA_HOME"
echo "Using CATALINA_TMPDIR: $CATALINA_TMPDIR"
echo "Using JAVA_HOME: $JAVA_HOME"# ......當執行catalina.sh的參數是jpda的時候......if [ "$1" = "jpda" ] ; then
if [ -z "$JPDA_TRANSPORT" ]; then
JPDA_TRANSPORT="dt_socket"
fi
if [ -z "$JPDA_ADDRESS" ]; then
JPDA_ADDRESS="8000"
fi
if [ -z "$JPDA_OPTS" ]; then
JPDA_OPTS="-Xdebug -Xrunjdwp:transport=$JPDA_TRANSPORT,address=$JPDA_ADDRESS,server=y,suspend=n"
fi
CATALINA_OPTS="$CATALINA_OPTS $JPDA_OPTS"
shift
fi# ......當執行catalina.sh的參數是debug的時候......if [ "$1" = "debug" ] ; then
shift
if [ "$1" = "-security" ] ; then
echo "Using Security Manager"
shift
exec "$_RUNJDB" $JAVA_OPTS $CATALINA_OPTS /
-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" /
-sourcepath "$CATALINA_HOME"/../../jakarta-tomcat-4.0/catalina/src/share /
-Djava.security.manager /
-Djava.security.policy=="$CATALINA_BASE"/conf/catalina.policy /
-Dcatalina.base="$CATALINA_BASE" /
-Dcatalina.home="$CATALINA_HOME" /
-Djava.io.tmpdir="$CATALINA_TMPDIR" /
org.apache.catalina.startup.Bootstrap "$@" start
else
exec "$_RUNJDB" $JAVA_OPTS $CATALINA_OPTS /
-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" /
-sourcepath "$CATALINA_HOME"/../../jakarta-tomcat-4.0/catalina/src/share /
-Dcatalina.base="$CATALINA_BASE" /
-Dcatalina.home="$CATALINA_HOME" /
-Djava.io.tmpdir="$CATALINA_TMPDIR" /
org.apache.catalina.startup.Bootstrap "$@" start
fi# ......當執行catalina.sh的參數是embedded的時候......elif [ "$1" = "embedded" ] ; then
shift
echo "Embedded Classpath: $CLASSPATH"
exec "$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS /
-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" /
-Dcatalina.base="$CATALINA_BASE" /
-Dcatalina.home="$CATALINA_HOME" /
-Djava.io.tmpdir="$CATALINA_TMPDIR" /
org.apache.catalina.startup.Embedded "$@"# +----------------------------------------------------+
# | ......當執行catalina.sh的參數是run的時候...... |
# | 在當前窗口中啓動tomcat服務器！！！ |
# +----------------------------------------------------+elif [ "$1" = "run" ]; then
# 把參數run去掉
shift
# 若是參數是run -security，則啓動Security Manager
if [ "$1" = "-security" ] ; then
echo "Using Security Manager"
shift
exec "$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS /
-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" /
-Djava.security.manager /
-Djava.security.policy=="$CATALINA_BASE"/conf/catalina.policy /
-Dcatalina.base="$CATALINA_BASE" /
-Dcatalina.home="$CATALINA_HOME" /
-Djava.io.tmpdir="$CATALINA_TMPDIR" /
org.apache.catalina.startup.Bootstrap "$@" start
# 若是參數是孤單的run，則在本窗口中啓動tomcat服務器
# 在本窗口中啓動的方法是使用exec，讓當前進程fork一個新進程來啓動tomcat，當前進程是tomcat的父進程
# 啓動tomcat的類是org.apache.catalina.startup.Bootstrap.main("start");
else
exec "$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS /
-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" /
-Dcatalina.base="$CATALINA_BASE" /
-Dcatalina.home="$CATALINA_HOME" /
-Djava.io.tmpdir="$CATALINA_TMPDIR" /
org.apache.catalina.startup.Bootstrap "$@" start
fi# +----------------------------------------------------+
# | ......當執行catalina.sh的參數是start的時候...... |
# | 在新窗口中啓動tomcat服務器！！！ |
# +----------------------------------------------------+elif [ "$1" = "start" ] ; then
# 把參數start去掉
shift
# 建立一個文件（若是文件不存在的話）$CATALINA_BASE/logs/catalina.out
touch "$CATALINA_BASE"/logs/catalina.out
# 若是參數是start -security，則啓動Security Manager
if [ "$1" = "-security" ] ; then
echo "Using Security Manager"
shift
"$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS /
-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" /
-Djava.security.manager /
-Djava.security.policy=="$CATALINA_BASE"/conf/catalina.policy /
-Dcatalina.base="$CATALINA_BASE" /
-Dcatalina.home="$CATALINA_HOME" /
-Djava.io.tmpdir="$CATALINA_TMPDIR" /
org.apache.catalina.startup.Bootstrap "$@" start /
>> "$CATALINA_BASE"/logs/catalina.out 2>&1 &
if [ ! -z "$CATALINA_PID" ]; then
echo $! > $CATALINA_PID
fi
# 若是參數是孤單的start，那麼在新窗口中啓動tomcat
else
"$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS /
-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" /
-Dcatalina.base="$CATALINA_BASE" /
-Dcatalina.home="$CATALINA_HOME" /
-Djava.io.tmpdir="$CATALINA_TMPDIR" /
org.apache.catalina.startup.Bootstrap "$@" start /
>> "$CATALINA_BASE"/logs/catalina.out 2>&1 &
if [ ! -z "$CATALINA_PID" ]; then
echo $! > $CATALINA_PID
fi
fi# +----------------------------------------------------+
# | ......當執行catalina.sh的參數是stop的時候...... |
# | 關閉tomcat服務器！！！ |
# +----------------------------------------------------+elif [ "$1" = "stop" ] ; then
# 把參數stop去掉
shift
# 關閉tomcat服務器的類是org.apache.catalina.startup.Bootstrap->main("stop");
# 注意：java -D 是設置系統屬性
exec "$_RUNJAVA" $JAVA_OPTS $CATALINA_OPTS /
-Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" /
-Dcatalina.base="$CATALINA_BASE" /
-Dcatalina.home="$CATALINA_HOME" /
-Djava.io.tmpdir="$CATALINA_TMPDIR" /
org.apache.catalina.startup.Bootstrap "$@" stop# +----------------------------------------------------+
# | ......當執行catalina.sh的參數不可辨認的時候...... |
# | 打印幫助信息，由此查看各類參數表明的意義！！！ |
# +----------------------------------------------------+else
echo "Usage: catalina.sh ( commands ... )"
echo "commands:"
echo " debug Start Catalina in a debugger"
echo " debug -security Debug Catalina with a security manager"
echo " embedded Start Catalina in embedded mode"
echo " jpda start Start Catalina under JPDA debugger"
echo " run Start Catalina in the current window"
echo " run -security Start in the current window with security manager"
echo " start Start Catalina in a separate window"
echo " start -security Start in a separate window with security manager"
echo " stop Stop Catalina"
exit 1
fi
相關文章
- 1. tomcat啓動分析（1）
- 2. Tomcat啓動分析（轉）
- 3. Tomcat啓動問題分析
- 4. tomcat啓動分析（一）
- 5. tomcat啓動分析（3）
- 6. 【Tomcat啓動類分析】
- 7. How Tomcat works - tomcat啓動（2）
- 8. 啓動2個tomcat
- 9. Android DHCP 啓動分析【2】
- 10. Tomcat啓動解析web.xml源碼分析
- 更多相關文章...
- • 啓動MySQL服務 - MySQL教程
- • SVN 啓動模式 - SVN 教程
- • Tomcat學習筆記（史上最全tomcat學習筆記）
- • Git五分鐘教程
相關標籤/搜索
每日一句
-
每一个你不满意的现在，都有一个你没有努力的曾经。
最新文章
- 1. 融合阿里雲，牛客助您找到心儀好工作
- 2. 解決jdbc(jdbctemplate)在測試類時不報錯在TomCatb部署後報錯
- 3. 解決PyCharm GoLand IntelliJ 等 JetBrains 系列 IDE無法輸入中文
- 4. vue+ant design中關於圖片請求不顯示的問題。
- 5. insufficient memory && Native memory allocation (malloc) failed
- 6. 解決IDEA用Maven創建的Web工程不能創建Java Class文件的問題
- 7. [已解決] Error: Cannot download ‘https://start.spring.io/starter.zip?
- 8. 在idea讓java文件夾正常使用
- 9. Eclipse啓動提示「subversive connector discovery」
- 10. 帥某-技巧-快速轉帖博主文章（article_content）
歡迎關注本站公眾號,獲取更多信息
相關文章
- 1. tomcat啓動分析（1）
- 2. Tomcat啓動分析（轉）
- 3. Tomcat啓動問題分析
- 4. tomcat啓動分析（一）
- 5. tomcat啓動分析（3）
- 6. 【Tomcat啓動類分析】
- 7. How Tomcat works - tomcat啓動（2）
- 8. 啓動2個tomcat
- 9. Android DHCP 啓動分析【2】
- 10. Tomcat啓動解析web.xml源碼分析