intellij idea施用tomcat开发时自动部署jndi数据源

intellij idea使用tomcat开发时自动部署jndi数据源

通常，如果需要在应用中使用tomcat的jndi数据源，需要修改context配置，例如
<?xml?version="1.0"?encoding="UTF-8"?>
<Context?path="/app"?docBase="E:\appweb">
??<Resource?name="jndi/ds"?auth="Container"?type="javax.sql.DataSource"?driverClassName="oracle.jdbc.OracleDriver"?url="jdbc:oracle:thin:@192.168.1.3:1522:orcl"?username="111"?password="222"?maxActive="20"?maxIdle="10"?maxWait="-1"?/>
</Context>但是使用intellij idea开发时，tomcat插件会自动维护该文件，为此我们对tomcat插件可以做些适当的修改。
1、设计目标
目标：在deploy部署时，自动检查web程序根目录，也就是docBase/META-INF/jndi-resource.xml文件是否存在，如果有，则该文件定义的recource资源自动加入context节点中部署
这样程序就可以很方便的使用tomcat jndi数据源了，如果切换当生产环境，例如weblogic，也不用修改什么。
2、实现
修改C:\Program Files\JetBrains\IntelliJ IDEA 9.0.1\lib\src\src_tomcat.zip中的org.jetbrains.idea.tomcat.TomcatDeploymentProviderw文件
a）增加一个方法
?1private?static?void?addAppResource(Element?ctx,String?deploymentPath){
?2????????File?f?=?new?File(deploymentPath+File.separator+"META-INF"+File.separator+"jndi-resource.xml");
?3????????if?(f.exists())?{
?4????????????try?{
?5????????????????if(ctx.getContentSize()>0)?return;
?6????????????????Document?doc?=?TomcatUtil.loadXMLFile(f.getPath());//builder.build(new?FileInputStream(f));
?7????????????????List?nodes=doc.getRootElement().getChildren("Resource");
?8????????????????for(int?i=0;i<nodes.size();i++){
?9????????????????????Element?n=(Element)nodes.get(i);
10????????????????????ctx.addContent((Element)n.clone());
11????????????????????System.out.println("Load?JNDI?resource?from?"+f.getPath()+".");
12????????????????}
13????????????}?catch?(Exception?ex)?{
14????????????????LOG.info("加载应用的资源配置错误:"+ex.getMessage());
15????????????}
16????????}
17????}b)修改调用
?1?private?static?void?addApplicationContext(TomcatModuleDeploymentModel?tomcatModuleDeploymentModel)?throws?ExecutionException?{
?2????try?{
?3??????TomcatModel?serverModel?=?(TomcatModel)tomcatModuleDeploymentModel.getServerModel();
?4??????String?contextPath?=?getContextPath(tomcatModuleDeploymentModel);
?5
?6??????Element?contextElement?=?TomcatUtil.findContextElement(serverModel.getSourceBaseDirectoryPath(),?contextPath,?tomcatModuleDeploymentModel);
?7
?8??????if?(contextElement?==?null)?{
?9????????contextElement?=?new?Element(CONTEXT_ELEMENT_NAME);
10????????//contextElement.addContent((Comment)TomcatConstants.CONTEXT_COMMENT.clone());
11??????}
12
13??????final?String?deploymentPath?=?TomcatUtil.getDeploymentPath(tomcatModuleDeploymentModel);
14??????if?(deploymentPath?==?null)?{
15????????throw?new?ExecutionException(TomcatBundle.message("exception.text.neither.exploded.directory.nor.jar.file.configured"));
16??????}
17
18??????if?(!new?File(deploymentPath).exists())?{
19????????throw?new?ExecutionException(TomcatBundle.message("exception.text.file.not.found.for.web.module",?deploymentPath));
20??????}
21
22??????//remove?unpacked?WAR?directory
23??????if(DeploymentSource.FROM_JAR?==?tomcatModuleDeploymentModel.getDeploymentSource())?{
24????????final?String?contextXML?=?TomcatUtil.getContextXML(serverModel.getSourceBaseDirectoryPath(),?contextPath);
25????????final?String?xmlName?=?new?File(contextXML).getName();
26????????final?String?dirName?=?xmlName.substring(0,?xmlName.length()?-?4);
27
28????????final?Document?serverXmlDocument?=?TomcatUtil.loadXMLFile(TomcatUtil.serverXML(serverModel.getBaseDirectoryPath()));
29????????final?Element?localHost?=?TomcatUtil.findLocalHost(serverXmlDocument.getRootElement());
30
31????????final?String?appBase?=?localHost.getAttributeValue(APP_BASE_ATTR);
32????????FileUtil.delete(new?File(appBase,?dirName));
33??????}
34
35??????contextElement.setAttribute(PATH_ATTR,?contextPath);
36??????contextElement.setAttribute(DOC_BASE_ATTR,?deploymentPath);
37
38??????if(serverModel.versionHigher(TomcatPersistentData.VERSION50))?{
39????????final?String?contextXML?=?TomcatUtil.getContextXML(serverModel.getBaseDirectoryPath(),?contextPath);
40????????final?File?targetContextXmlFile?=?new?File(contextXML);
41????????targetContextXmlFile.getParentFile().mkdirs();
42
43????????final?Document?xmlDocument;
44????????if(contextElement.getDocument()?!=?null?&&?contextElement.isRootElement())?{
45??????????xmlDocument?=?(Document)contextElement.getDocument().clone();
46????????}
47????????else{
48??????????xmlDocument?=?new?Document();
49??????????xmlDocument.setRootElement((Element)contextElement.clone());
50????????}
51????????//新增调用方法，处理额外的resource
52????????addAppResource(xmlDocument.getRootElement(),deploymentPath);
53????????TomcatUtil.saveXMLFile(xmlDocument,?targetContextXmlFile.getPath(),?true);
54??????}
55??????else?{
56????????String?root?=?FileUtil.toSystemDependentName(TomcatUtil.getGeneratedFilesPath(serverModel));
57????????String?scratchdir?=?root?+?File.separator?+?TomcatConstants.CATALINA_WORK_DIRECTORY_NAME?+?File.separator
58????????????????????????????+?new?File(TomcatUtil.getContextXML(serverModel.getBaseDirectoryPath(),?contextPath)).getName();
59????????new?File(scratchdir).mkdirs();
60
61????????contextElement.setAttribute(WORKDIR_ATTR,?scratchdir);
62
63????????addOrRemoveContextElementInServerXml(serverModel,?contextPath,?contextElement);
64??????}
65????}
66????catch?(RuntimeConfigurationException?e)?{
67??????throw?new?ExecutionException(e.getMessage());
68????}
69??}
编译源代码，使用如下命令行
javac -classpath "tomcat.jar;C:\Program Files\JetBrains\IntelliJ IDEA 9.0.1\lib\idea.jar;C:\Program Files\JetBrains\IntelliJ IDEA 9.0.1\lib\openapi.jar;C:\Program Files\JetBrains\IntelliJ IDEA 9.0.1\lib\jdom.jar;C:\Program Files\JetBrains\IntelliJ IDEA 9.0.1\plugins\JavaEE\lib\javaee-openapi.jar;C:\Program Files\JetBrains\IntelliJ IDEA 9.0.1\lib\util.jar;C:\Program Files\JetBrains\IntelliJ IDEA 9.0.1\lib\annotations.jar;C:\Program Files\JetBrains\IntelliJ IDEA 9.0.1\plugins\DatabaseSupport\lib\database-openapi.jar" -target 1.5 -source 1.5 *.java

编译完成之后，将新的class覆盖到tomcat.jar中就可以了。

3、测试
web应用的根目录加入META-INF/jndi-resource.xml，内容如下：
<r>
<Resource?name="jndi/ds"?auth="Container"?type="javax.sql.DataSource"?driverClassName="oracle.jdbc.OracleDriver"?url="jdbc:oracle:thin:@192.168.1.3:1522:orcl"?username="111"?password="222"?maxActive="20"?maxIdle="10"?maxWait="-1"?/>
</r>