Posted on 2011-01-02 17:36
在路上... 阅读(12336)
评论(0) 编辑 收藏 所属分类:
JAVA相关
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>
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
1
private 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>
经过使用idea 9.0+tomcat 6测试通过，附件：
tomcat插件，改为.jar