java 在jetty中热部署简单的应用程序
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hot deploying simple application in jetty
提问by Casey
I am working with jetty hightide vesion 7 currently as a stand alone server. I have a simple web project with a couple of jsp's and backing classes that I am currently deploying in an unexploded war to the JETTY_HOME/webapps directory.
我目前正在使用 jetty hightide vesion 7 作为独立服务器。我有一个简单的 web 项目，其中包含几个 jsp 和支持类，我目前正在将它们部署到 JETTY_HOME/webapps 目录的未爆炸War中。
Currently, jetty easily picks up any static jsp/html changes. If I understand correctly, I can configure my app so that jetty will pick up any class changes without restarting the server? I currently have in my jetty-web.xml:
目前，jetty 可以轻松获取任何静态 jsp/html 更改。如果我理解正确，我可以配置我的应用程序，以便码头可以在不重新启动服务器的情况下接收任何类更改？我目前在我的 jetty-web.xml 中有：
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE Configure PUBLIC "-//Mort Bay Consulting//DTD Configure//EN" "http://www.eclipse.org/jetty/configure.dtd">
<!--
This is the jetty specific web application configuration file. When
starting a Web Application, the WEB-INF/web-jetty.xml file is looked
for and if found, treated as a
org.eclipse.jetty.server.server.xml.XmlConfiguration file and is
applied to the org.eclipse.jetty.servlet.WebApplicationContext objet
-->
<Configure class="org.eclipse.jetty.webapp.WebAppContext">
<Call class="org.eclipse.jetty.util.log.Log" name="debug">
<Arg>executing jetty-web.xml</Arg>
</Call>
<Set name="contextPath">/SimpleDynamicProject</Set>
</Configure>
I also have created a SimpleDynamicProject.xml and put it in JETTY_HOME/contexts. This file contains:
我还创建了一个 SimpleDynamicProject.xml 并将其放在 JETTY_HOME/contexts 中。该文件包含：
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE Configure PUBLIC "-//Mort Bay Consulting//DTD Configure//EN" "http://www.eclipse.org/jetty/configure.dtd">
<!--
This is the jetty specific web application configuration file. When
starting a Web Application, the WEB-INF/web-jetty.xml file is looked
for and if found, treated as a
org.eclipse.jetty.server.server.xml.XmlConfiguration file and is
applied to the org.eclipse.jetty.servlet.WebApplicationContext objet
-->
<Configure class="org.eclipse.jetty.webapp.WebAppContext">
<Set name="contextPath">/SimpleDynamicProject</Set>
<Set name="resourceBase"><SystemProperty name="jetty.home" default="."/>/webapps/SimpleDynamicProject</Set>
</Configure>
I am also not sure how to correctly start Jetty in debug mode which I read was also needed. I have tried starting the server with:
我也不确定如何在调试模式下正确启动 Jetty，我也读到过。我尝试使用以下命令启动服务器：
java -Xdebug -jar start.jar OPTIONS=Server,jsp
and
和
java -Ddebug -jar start.jar OPTIONS=Server,jsp
This is the first time I've used jetty, but so far I really like it.
这是我第一次使用jetty，但到目前为止我真的很喜欢它。
Thanks for the help.
谢谢您的帮助。
采纳答案by Maciek Kreft
If you want to use jetty maven plugin
如果你想使用jetty maven插件
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>maven-jetty-plugin</artifactId>
<version>6.1.25</version>
<configuration>
<scanIntervalSeconds>10</scanIntervalSeconds>
<requestLog implementation="org.mortbay.jetty.NCSARequestLog">
<!--
This doesn't do anything for Jetty, but is a workaround for a
Maven bug that prevents the requestLog from being set.
-->
<append>true</append>
</requestLog>
<webApp>${basedir}/out/war/Spring2_5_6_war.war</webApp>
</configuration>
</plugin>
回答by Pascal Thivent
You need to define a ContextDeployerwith a non-zero scan interval:
您需要定义一个具有非零扫描间隔的ContextDeployer：
<Call name="addLifeCycle">
<Arg>
<New class="org.mortbay.jetty.deployer.ContextDeployer">
<Set name="contexts"><Ref id="Contexts"/></Set>
<Set name="configurationDir"><SystemProperty name="jetty.home" default="."/>/contexts</Set>
<Set name="scanInterval">1</Set>
</New>
</Arg>
</Call>
Regarding debugging, I guess that what you have in mind is to connect a remote debugger using JPDA. For this, you'll need to set the -agentlib:jdwpoption1:
关于调试，我猜您想到的是使用 JPDA 连接远程调试器。为此，您需要设置-agentlib:jdwp选项1：
-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=5005
The configure your IDE debugger to connect on the specified port.
配置您的 IDE 调试器以连接到指定的端口。
1if the target VM is 5.0 or newer, -agentlib:jdwpis preferable over the -Xdebugand -Xrunjdwpoptions which are still supported though.
1如果目标 VM 是 5.0 或更高版本，-agentlib:jdwp则比仍然支持的-Xdebug和-Xrunjdwp选项更可取。
