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。

1. 首先在pom文件中，添加maven-assembly-plugin插件

<plugin>
  <artifactId>maven-assembly-pluginartifactId>
  <configuration>
    <descriptor>src/main/assembly/assembly.xmldescriptor>
  configuration>
  <executions>
    <execution>
      <id>make-assemblyid>
      <phase>packagephase>
      <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

2. assembly.xml文件

<assembly>
  <id>assemblyid>
  <formats>
    <format>tar.gzformat>
  formats>
  <includeBaseDirectory>trueincludeBaseDirectory>
  <fileSets>
    <fileSet>
      <outputDirectory>/outputDirectory>
      <includes>
        <include>README.txtinclude>
      includes>
    fileSet>
    <fileSet>
      <directory>src/main/scriptsdirectory>
      <outputDirectory>/binoutputDirectory>
    fileSet>
  fileSets>
  <dependencySets>
    <dependencySet>
      <useProjectArtifact>trueuseProjectArtifact>
      <outputDirectory>liboutputDirectory>
    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

3. 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 '/dubbo.application.name/!d;s/.*=//' conf/dubbo.properties | tr -d '\r'`
#SERVER_PROTOCOL=`sed '/dubbo.protocol.name/!d;s/.*=//' conf/dubbo.properties | tr -d '\r'`
#SERVER_PORT=`sed '/dubbo.protocol.port/!d;s/.*=//' conf/dubbo.properties | tr -d '\r'`
#LOGS_FILE=`sed '/dubbo.log4j.file/!d;s/.*=//' conf/dubbo.properties | tr -d '\r'`
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 '{print $2}'`
if [ -n "$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 $LIB_DIR|grep .jar|awk '{print "'$LIB_DIR'/"$0}'|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 ...\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 '{print $2}' | wc -l`
    fi
    if [ $COUNT -gt 0 ]; then
        break
    fi
done

echo "OK!"
PIDS=`ps -f | grep java | grep "$DEPLOY_DIR" | awk '{print $2}'`
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 '/dubbo.application.name/!d;s/.*=//' conf/dubbo.properties | tr -d '\r'`

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

PIDS=`ps -f | grep java | grep "$CONF_DIR" |awk '{print $2}'`
if [ -z "$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 ...\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 '/dubbo.application.name/!d;s/.*=//' conf/dubbo.properties | tr -d '\r'`
LOGS_FILE=`sed '/dubbo.log4j.file/!d;s/.*=//' conf/dubbo.properties | tr -d '\r'`

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

PIDS=`ps -f | grep java | grep "$CONF_DIR" |awk '{print $2}'`
if [ -z "$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 ...\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。

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作 者： Bridge Li，http://www.bridgeli.cn

原文链接： http://www.bridgeli.cn/archives/236

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