maven打包dubbo接口之最佳实践

之前刚开始学习dubbo的时候，曾写过一个入门的小例子，当时生产者也是用tomcat去跑的，其实dubbo只需要提供service层接口就好了，并不需要和http相关的东西，所以其实并不需要用tomcat去跑，我们完全打成其他的包直接去跑，这样dubbo接口也不会tomcat性能的限制，而打包可以说是maven最擅长的事情之一，今天就记录一下我们公司的实际项目中使用maven-assembly-plugin打包的方法。

首先在pom文件中，添加maven-assembly-plugin插件


<plugin>  
<artifactId>maven-assembly-plugin</artifactId>  
<configuration>  
<descriptor>src/main/assembly/assembly.xml</descriptor>  
</configuration>  
<executions>  
<execution>  
<id>make-assembly</id>  
<phase>package</phase>  
<goals>  
<goal>single </goal>  
</goals>  
</execution>  
</executions>  
</plugin>

在该插件的第四行我们指定了一个assembly.xml文件，下面我们就看看assembly.xml的内容

assembly.xml文件


<assembly>  
<id>assembly</id>  
<formats>  
<format>tar.gz</format>  
</formats>  
<includeBaseDirectory>true</includeBaseDirectory>  
<fileSets>  
<fileSet>  
<outputDirectory>/</outputDirectory>  
<includes>  
<include>README.txt</include>  
</includes>  
</fileSet>  
<fileSet>  
<directory>src/main/scripts</directory>  
<outputDirectory>/bin</outputDirectory>  
</fileSet>  
</fileSets>  
<dependencySets>  
<dependencySet>  
<useProjectArtifact>true</useProjectArtifact>  
<outputDirectory>lib</outputDirectory>  
</dependencySet>  
</dependencySets>  
</assembly>

该文件的第四行中的tar.gz指的就是打包的文件格式，对于Linux用户，对这个格式一定非常熟悉，当然大家也可以指定为zip格式，另外在该文件的第十五行，指定了一个scripts文件夹，那么这里面放的又是什么呢？我们知道打包之后的系统我们要跑起来才能用，那么这里面放的就是对我们的系统操作的一些脚本，打包之后，我们的系统都是一些jar文件，放在了倒数第四行指定的lib文件中，而这些脚本则放在了和lib同级的bin文件中，下面就让我们一一看看scripts中几个文件的内容

scripts文件夹

①. start.bat


@echo off & setlocal enabledelayedexpansion

set LIB_JARS=""  
cd ..lib  
for %%i in (*) do set LIB_JARS=!LIB_JARS!;..lib%%i  
cd ..bin

if ""%1"" == ""debug"" goto debug  
if ""%1"" == ""jmx"" goto jmx

java -Xms64m -Xmx1024m -XX:MaxPermSize=64M -classpath ..conf;%LIB_JARS% com.alibaba.dubbo.container.Main  
goto end

:debug  
java -Xms64m -Xmx1024m -XX:MaxPermSize=64M -Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,address=8000,server=y,suspend=n -classpath ..conf;%LIB_JARS% com.alibaba.dubbo.container.Main  
goto end

:jmx  
java -Xms64m -Xmx1024m -XX:MaxPermSize=64M -Dcom.sun.management.jmxremote.port=1099 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -classpath ..conf;%LIB_JARS% com.alibaba.dubbo.container.Main

:end  
pause

②. start.sh


#!/bin/bash  
cd \`dirname $0\`  
BIN_DIR=\`pwd\`  
cd ..  
DEPLOY_DIR=\`pwd\`  
CONF_DIR=$DEPLOY_DIR/conf

USER=www  
GROUP=www

#SERVER_NAME=\`sed &#8216;/dubbo.application.name/!d;s/.*=//&#8217; conf/dubbo.properties | tr -d &#8216;r&#8217;\`  
#SERVER_PROTOCOL=\`sed &#8216;/dubbo.protocol.name/!d;s/.*=//&#8217; conf/dubbo.properties | tr -d &#8216;r&#8217;\`  
#SERVER_PORT=\`sed &#8216;/dubbo.protocol.port/!d;s/.*=//&#8217; conf/dubbo.properties | tr -d &#8216;r&#8217;\`  
#LOGS_FILE=\`sed &#8216;/dubbo.log4j.file/!d;s/.*=//&#8217; conf/dubbo.properties | tr -d &#8216;r&#8217;\`  
SERVER_NAME=""  
SERVER_PROTOCOL=""  
SERVER_PORT=""  
LOGS_FILE=""

if [ -z "$SERVER_NAME" ]; then  
SERVER_NAME=\`hostname\`  
fi

PIDS=\`ps -f | grep java | grep "$CONF_DIR" |awk &#8216;{print $2}&#8217;\`  
if [ -n "$PIDS" ]; then  
echo "ERROR: The $SERVER_NAME already started!"  
echo "PID: $PIDS"  
exit 1  
fi

if [ -n "$SERVER_PORT" ]; then  
SERVER_PORT_COUNT=\`netstat -tln | grep $SERVER_PORT | wc -l\`  
if [ $SERVER_PORT_COUNT -gt 0 ]; then  
echo "ERROR: The $SERVER_NAME port $SERVER_PORT already used!"  
exit 1  
fi  
fi

LOGS_DIR="/data/logs/\`basename $DEPLOY_DIR\`"

if [ ! -d $LOGS_DIR ]; then  
mkdir -p $LOGS_DIR  
chown -R $USER.$GROUP $LOGS_DIR  
fi  
STDOUT_FILE=$LOGS_DIR/\`basename $DEPLOY_DIR\`.log

LIB_DIR=$DEPLOY_DIR/lib  
LIB_JARS=\`ls $LIB_DIR|grep .jar|awk &#8216;{print "&#8217;$LIB_DIR&#8217;/"$0}&#8217;|tr "n" ":"\`

JAVA_OPTS=" -Djava.awt.headless=true -Djava.net.preferIPv4Stack=true "  
JAVA_DEBUG_OPTS=""  
if [ "$1" = "debug" ]; then  
JAVA_DEBUG_OPTS=" -Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,address=8000,server=y,suspend=n "  
fi  
JAVA_JMX_OPTS=""  
if [ "$1" = "jmx" ]; then  
JAVA_JMX_OPTS=" -Dcom.sun.management.jmxremote.port=1099 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false "  
fi  
JAVA_MEM_OPTS=""  
BITS=\`java -version 2>&1 | grep -i 64-bit\`  
if [ -n "$BITS" ]; then  
JAVA_MEM_OPTS=" -server -Xmx2g -Xms2g -Xmn720m -XX:PermSize=128m -Xss256k -XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:+UseCMSCompactAtFullCollection -XX:LargePageSizeInBytes=128m -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=70 "  
else  
JAVA_MEM_OPTS=" -server -Xms2g -Xmx2g -XX:PermSize=128m -XX:SurvivorRatio=2 -XX:+UseParallelGC "  
fi

echo -e "Starting the $SERVER_NAME &#8230;c"  
nohup java $JAVA_OPTS $JAVA_MEM_OPTS $JAVA_DEBUG_OPTS $JAVA_JMX_OPTS -classpath $CONF_DIR:$LIB_JARS com.alibaba.dubbo.container.Main > $STDOUT_FILE 2>&1 &

COUNT=0  
while [ $COUNT -lt 1 ]; do  
echo -e ".c"  
sleep 1  
if [ -n "$SERVER_PORT" ]; then  
if [ "$SERVER_PROTOCOL" == "dubbo" ]; then  
COUNT=\`echo status | nc -i 1 127.0.0.1 $SERVER_PORT | grep -c OK\`  
else  
COUNT=\`netstat -an | grep $SERVER_PORT | wc -l\`  
fi  
else  
COUNT=\`ps -f | grep java | grep "$DEPLOY_DIR" | awk &#8216;{print $2}&#8217; | wc -l\`  
fi  
if [ $COUNT -gt 0 ]; then  
break  
fi  
done

echo "OK!"  
PIDS=\`ps -f | grep java | grep "$DEPLOY_DIR" | awk &#8216;{print $2}&#8217;\`  
echo "PID: $PIDS"  
echo "STDOUT: $STDOUT_FILE"

③. stop.sh


#!/bin/bash  
cd \`dirname $0\`  
BIN_DIR=\`pwd\`  
cd ..  
DEPLOY_DIR=\`pwd\`  
CONF_DIR=$DEPLOY_DIR/conf

SERVER_NAME=\`sed &#8216;/dubbo.application.name/!d;s/.*=//&#8217; conf/dubbo.properties | tr -d &#8216;r&#8217;\`

if [ -z "$SERVER_NAME" ]; then  
SERVER_NAME=\`hostname\`  
fi

PIDS=\`ps -f | grep java | grep "$CONF_DIR" |awk &#8216;{print $2}&#8217;\`  
if [ -z "$PIDS" ]; then  
echo "ERROR: The $SERVER_NAME does not started!"  
exit 1  
fi

if [ "$1" != "skip" ]; then  
$BIN_DIR/dump.sh  
fi

echo -e "Stopping the $SERVER_NAME &#8230;c"  
for PID in $PIDS ; do  
kill $PID > /dev/null 2>&1  
done

COUNT=0  
while [ $COUNT -lt 1 ]; do  
echo -e ".c"  
sleep 1  
COUNT=1  
for PID in $PIDS ; do  
PID_EXIST=\`ps -f -p $PID | grep java\`  
if [ -n "$PID_EXIST" ]; then  
COUNT=0  
break  
fi  
done  
done

echo "OK!"  
echo "PID: $PIDS"

④. restart.sh


#!/bin/bash  
cd \`dirname $0\`  
./stop.sh  
./start.sh

⑤. server.sh


#!/bin/bash  
cd \`dirname $0\`  
if [ "$1" = "start" ]; then  
./start.sh  
else  
if [ "$1" = "stop" ]; then  
./stop.sh  
else  
if [ "$1" = "debug" ]; then  
./start.sh debug  
else  
if [ "$1" = "restart" ]; then  
./restart.sh  
else  
if [ "$1" = "dump" ]; then  
./dump.sh  
else  
echo "ERROR: Please input argument: start or stop or debug or restart or dump"  
exit 1  
fi  
fi  
fi  
fi  
fi

⑥. dump.sh


#!/bin/bash  
cd \`dirname $0\`  
BIN_DIR=\`pwd\`  
cd ..  
DEPLOY_DIR=\`pwd\`  
CONF_DIR=$DEPLOY_DIR/conf

SERVER_NAME=\`sed &#8216;/dubbo.application.name/!d;s/.*=//&#8217; conf/dubbo.properties | tr -d &#8216;r&#8217;\`  
LOGS_FILE=\`sed &#8216;/dubbo.log4j.file/!d;s/.*=//&#8217; conf/dubbo.properties | tr -d &#8216;r&#8217;\`

if [ -z "$SERVER_NAME" ]; then  
SERVER_NAME=\`hostname\`  
fi

PIDS=\`ps -f | grep java | grep "$CONF_DIR" |awk &#8216;{print $2}&#8217;\`  
if [ -z "$PIDS" ]; then  
echo "ERROR: The $SERVER_NAME does not started!"  
exit 1  
fi

LOGS_DIR=""  
if [ -n "$LOGS_FILE" ]; then  
LOGS_DIR=\`dirname $LOGS_FILE\`  
else  
LOGS_DIR=$DEPLOY_DIR/logs  
fi  
if [ ! -d $LOGS_DIR ]; then  
mkdir $LOGS_DIR  
fi  
DUMP_DIR=$LOGS_DIR/dump  
if [ ! -d $DUMP_DIR ]; then  
mkdir $DUMP_DIR  
fi  
DUMP_DATE=\`date +%Y%m%d%H%M%S\`  
DATE_DIR=$DUMP_DIR/$DUMP_DATE  
if [ ! -d $DATE_DIR ]; then  
mkdir $DATE_DIR  
fi

echo -e "Dumping the $SERVER_NAME &#8230;c"  
for PID in $PIDS ; do  
jstack $PID > $DATE_DIR/jstack-$PID.dump 2>&1  
echo -e ".c"  
jinfo $PID > $DATE_DIR/jinfo-$PID.dump 2>&1  
echo -e ".c"  
jstat -gcutil $PID > $DATE_DIR/jstat-gcutil-$PID.dump 2>&1  
echo -e ".c"  
jstat -gccapacity $PID > $DATE_DIR/jstat-gccapacity-$PID.dump 2>&1  
echo -e ".c"  
jmap $PID > $DATE_DIR/jmap-$PID.dump 2>&1  
echo -e ".c"  
jmap -heap $PID > $DATE_DIR/jmap-heap-$PID.dump 2>&1  
echo -e ".c"  
jmap -histo $PID > $DATE_DIR/jmap-histo-$PID.dump 2>&1  
echo -e ".c"  
if [ -r /usr/sbin/lsof ]; then  
/usr/sbin/lsof -p $PID > $DATE_DIR/lsof-$PID.dump  
echo -e ".c"  
fi  
done

if [ -r /bin/netstat ]; then  
/bin/netstat -an > $DATE_DIR/netstat.dump 2>&1  
echo -e ".c"  
fi  
if [ -r /usr/bin/iostat ]; then  
/usr/bin/iostat > $DATE_DIR/iostat.dump 2>&1  
echo -e ".c"  
fi  
if [ -r /usr/bin/mpstat ]; then  
/usr/bin/mpstat > $DATE_DIR/mpstat.dump 2>&1  
echo -e ".c"  
fi  
if [ -r /usr/bin/vmstat ]; then  
/usr/bin/vmstat > $DATE_DIR/vmstat.dump 2>&1  
echo -e ".c"  
fi  
if [ -r /usr/bin/free ]; then  
/usr/bin/free -t > $DATE_DIR/free.dump 2>&1  
echo -e ".c"  
fi  
if [ -r /usr/bin/sar ]; then  
/usr/bin/sar > $DATE_DIR/sar.dump 2>&1  
echo -e ".c"  
fi  
if [ -r /usr/bin/uptime ]; then  
/usr/bin/uptime > $DATE_DIR/uptime.dump 2>&1  
echo -e ".c"  
fi

echo "OK!"  
echo "DUMP: $DATE_DIR"

至于这些文件是干嘛的，相信作为一个程序猿不用老夫一一解释了，聪明如您，一定一眼就能看出来了，如果您的shell水平目前还不够，可以先看看老夫的这篇文章，看完之后再看这几个脚本可以说完全无压力。