/**
* Compile the jsp file from the current engine context. As an side- effect, tag files that are
* referenced by this page are also compiled.
*
* @param compileClass If true, generate both .java and .class file If false, generate only .java
* file
* @param jspcMode true if invoked from JspC, false otherwise
*/
public void compile(boolean compileClass, boolean jspcMode)
throws FileNotFoundException, JasperException, Exception {
if (errDispatcher == null) {
this.errDispatcher = new ErrorDispatcher(jspcMode);
}
try {
String[] smap = generateJava();
if (compileClass) {
generateClass(smap);
// Fix for bugzilla 41606
// Set JspServletWrapper.servletClassLastModifiedTime after successful compile
String targetFileName = ctxt.getClassFileName();
if (targetFileName != null) {
File targetFile = new File(targetFileName);
if (targetFile.exists() && jsw != null) {
jsw.setServletClassLastModifiedTime(targetFile.lastModified());
}
}
}
} finally {
if (tfp != null && ctxt.isPrototypeMode()) {
tfp.removeProtoTypeFiles(null);
}
// Make sure these object which are only used during the
// generation and compilation of the JSP page get
// dereferenced so that they can be GC'd and reduce the
// memory footprint.
tfp = null;
errDispatcher = null;
pageInfo = null;
// Only get rid of the pageNodes if in production.
// In development mode, they are used for detailed
// error messages.
// http://issues.apache.org/bugzilla/show_bug.cgi?id=37062
if (!this.options.getDevelopment()) {
pageNodes = null;
}
if (ctxt.getWriter() != null) {
ctxt.getWriter().close();
ctxt.setWriter(null);
}
}
}
/**
* Determine if a compilation is necessary by checking the time stamp of the JSP page with that of
* the corresponding .class or .java file. If the page has dependencies, the check is also
* extended to its dependeants, and so on. This method can by overidden by a subclasses of
* Compiler.
*
* @param checkClass If true, check against .class file, if false, check against .java file.
*/
public boolean isOutDated(boolean checkClass) {
String jsp = ctxt.getJspFile();
if (jsw != null && (ctxt.getOptions().getModificationTestInterval() > 0)) {
if (jsw.getLastModificationTest() + (ctxt.getOptions().getModificationTestInterval() * 1000)
> System.currentTimeMillis()) {
return false;
} else {
jsw.setLastModificationTest(System.currentTimeMillis());
}
}
long jspRealLastModified = 0;
// START PWC 6468930
File targetFile;
if (checkClass) {
targetFile = new File(ctxt.getClassFileName());
} else {
targetFile = new File(ctxt.getServletJavaFileName());
}
// Get the target file's last modified time. File.lastModified()
// returns 0 if the file does not exist.
long targetLastModified = targetFile.lastModified();
// Check cached class file
if (checkClass) {
JspRuntimeContext rtctxt = ctxt.getRuntimeContext();
String className = ctxt.getFullClassName();
long cachedTime = rtctxt.getBytecodeBirthTime(className);
if (cachedTime > targetLastModified) {
targetLastModified = cachedTime;
} else {
// Remove from cache, since the bytecodes from the file is more
// current, so that JasperLoader won't load the cached version
rtctxt.setBytecode(className, null);
}
}
if (targetLastModified == 0L) return true;
// Check if the jsp exists in the filesystem (instead of a jar
// or a remote location). If yes, then do a File.lastModified()
// to determine its last modified time. This is more performant
// (fewer stat calls) than the ctxt.getResource() followed by
// openConnection(). However, it only works for file system jsps.
// If the file has indeed changed, then need to call URL.OpenConnection()
// so that the cache loads the latest jsp file
if (jsw != null) {
File jspFile = jsw.getJspFile();
if (jspFile != null) {
jspRealLastModified = jspFile.lastModified();
}
}
if (jspRealLastModified == 0 || targetLastModified < jspRealLastModified) {
// END PWC 6468930
try {
URL jspUrl = ctxt.getResource(jsp);
if (jspUrl == null) {
ctxt.incrementRemoved();
return false;
}
URLConnection uc = jspUrl.openConnection();
jspRealLastModified = uc.getLastModified();
uc.getInputStream().close();
} catch (Exception e) {
e.printStackTrace();
return true;
}
// START PWC 6468930
}
// END PWC 6468930
/* PWC 6468930
long targetLastModified = 0;
File targetFile;
if( checkClass ) {
targetFile = new File(ctxt.getClassFileName());
} else {
targetFile = new File(ctxt.getServletJavaFileName());
}
if (!targetFile.exists()) {
return true;
}
targetLastModified = targetFile.lastModified();
*/
if (checkClass && jsw != null) {
jsw.setServletClassLastModifiedTime(targetLastModified);
}
if (targetLastModified < jspRealLastModified) {
// Remember JSP mod time
jspModTime = jspRealLastModified;
if (log.isLoggable(Level.FINE)) {
log.fine("Compiler: outdated: " + targetFile + " " + targetLastModified);
}
return true;
}
// determine if source dependent files (e.g. includes using include
// directives) have been changed.
if (jsw == null) {
return false;
}
List depends = jsw.getDependants();
if (depends == null) {
return false;
}
Iterator it = depends.iterator();
while (it.hasNext()) {
String include = (String) it.next();
try {
URL includeUrl = ctxt.getResource(include);
if (includeUrl == null) {
return true;
}
URLConnection includeUconn = includeUrl.openConnection();
long includeLastModified = includeUconn.getLastModified();
includeUconn.getInputStream().close();
if (includeLastModified > targetLastModified) {
// START GlassFish 750
if (include.endsWith(".tld")) {
ctxt.clearTaglibs();
ctxt.clearTagFileJarUrls();
}
// END GlassFish 750
return true;
}
} catch (Exception e) {
e.printStackTrace();
return true;
}
}
return false;
}
/** Compile the servlet from .java file to .class file */
private void generateClass() throws FileNotFoundException, JasperException, Exception {
long t1 = 0;
if (log.isLoggable(Level.FINE)) {
t1 = System.currentTimeMillis();
}
String javaFileName = ctxt.getServletJavaFileName();
String classpath = ctxt.getClassPath();
String sep = System.getProperty("path.separator");
// Initializing classpath
ArrayList<File> cpath = new ArrayList<File>();
HashSet<String> paths = new HashSet<String>();
// Process classpath, which includes system classpath from compiler
// options, plus the context classpath from the classloader
String sysClassPath = options.getSystemClassPath();
if (sysClassPath != null) {
StringTokenizer tokenizer = new StringTokenizer(sysClassPath, sep);
while (tokenizer.hasMoreElements()) {
String path = tokenizer.nextToken();
if (!paths.contains(path) && !systemJarInWebinf(path)) {
paths.add(path);
cpath.add(new File(path));
}
}
}
if (classpath != null) {
StringTokenizer tokenizer = new StringTokenizer(classpath, sep);
while (tokenizer.hasMoreElements()) {
String path = tokenizer.nextToken();
if (!paths.contains(path) && !systemJarInWebinf(path)) {
paths.add(path);
cpath.add(new File(path));
}
}
}
if (log.isLoggable(Level.FINE)) {
log.fine("Using classpath: " + sysClassPath + sep + classpath);
}
javaCompiler.setClassPath(cpath);
// Set debug info
javaCompiler.setDebug(options.getClassDebugInfo());
// Initialize and set java extensions
String exts = System.getProperty("java.ext.dirs");
if (exts != null) {
javaCompiler.setExtdirs(exts);
}
if (options.getCompilerTargetVM() != null) {
javaCompiler.setTargetVM(options.getCompilerTargetVM());
}
if (options.getCompilerSourceVM() != null) {
javaCompiler.setSourceVM(options.getCompilerSourceVM());
}
// Start java compilation
JavacErrorDetail[] javacErrors = javaCompiler.compile(ctxt.getFullClassName(), pageNodes);
if (javacErrors != null) {
// If there are errors, always generate java files to disk.
javaCompiler.doJavaFile(true);
log.severe("Error compiling file: " + javaFileName);
errDispatcher.javacError(javacErrors);
}
if (log.isLoggable(Level.FINE)) {
long t2 = System.currentTimeMillis();
log.fine("Compiled " + javaFileName + " " + (t2 - t1) + "ms");
}
// Save or delete the generated Java files, depending on the
// value of "keepgenerated" attribute
javaCompiler.doJavaFile(ctxt.keepGenerated());
// JSR45 Support
if (!ctxt.isPrototypeMode() && !options.isSmapSuppressed()) {
smapUtil.installSmap();
}
// START CR 6373479
if (jsw != null && jsw.getServletClassLastModifiedTime() <= 0) {
jsw.setServletClassLastModifiedTime(javaCompiler.getClassLastModified());
}
// END CR 6373479
if (options.getSaveBytecode()) {
javaCompiler.saveClassFile(ctxt.getFullClassName(), ctxt.getClassFileName());
}
// On some systems, due to file caching, the time stamp for the updated
// JSP file may actually be greater than that of the newly created byte
// codes in the cache. In such cases, adjust the cache time stamp to
// JSP page time, to avoid unnecessary recompilations.
ctxt.getRuntimeContext().adjustBytecodeTime(ctxt.getFullClassName(), jspModTime);
}
/**
* Determine if a compilation is necessary by checking the time stamp of the JSP page with that of
* the corresponding .class or .java file. If the page has dependencies, the check is also
* extended to its dependents, and so on. This method can by overridden by a subclasses of
* Compiler.
*
* @param checkClass If true, check against .class file, if false, check against .java file.
*/
public boolean isOutDated(boolean checkClass) {
String jsp = ctxt.getJspFile();
if (jsw != null && (ctxt.getOptions().getModificationTestInterval() > 0)) {
if (jsw.getLastModificationTest() + (ctxt.getOptions().getModificationTestInterval() * 1000)
> System.currentTimeMillis()) {
return false;
}
jsw.setLastModificationTest(System.currentTimeMillis());
}
long jspRealLastModified = 0;
try {
URL jspUrl = ctxt.getResource(jsp);
if (jspUrl == null) {
ctxt.incrementRemoved();
return true;
}
URLConnection uc = jspUrl.openConnection();
if (uc instanceof JarURLConnection) {
jspRealLastModified = ((JarURLConnection) uc).getJarEntry().getTime();
} else {
jspRealLastModified = uc.getLastModified();
}
uc.getInputStream().close();
} catch (Exception e) {
if (log.isDebugEnabled()) log.debug("Problem accessing resource. Treat as outdated.", e);
return true;
}
long targetLastModified = 0;
File targetFile;
if (checkClass) {
targetFile = new File(ctxt.getClassFileName());
} else {
targetFile = new File(ctxt.getServletJavaFileName());
}
if (!targetFile.exists()) {
return true;
}
targetLastModified = targetFile.lastModified();
if (checkClass && jsw != null) {
jsw.setServletClassLastModifiedTime(targetLastModified);
}
if (targetLastModified < jspRealLastModified) {
if (log.isDebugEnabled()) {
log.debug("Compiler: outdated: " + targetFile + " " + targetLastModified);
}
return true;
}
// determine if source dependent files (e.g. includes using include
// directives) have been changed.
if (jsw == null) {
return false;
}
List<String> depends = jsw.getDependants();
if (depends == null) {
return false;
}
Iterator<String> it = depends.iterator();
while (it.hasNext()) {
String include = it.next();
try {
URL includeUrl = ctxt.getResource(include);
if (includeUrl == null) {
return true;
}
URLConnection iuc = includeUrl.openConnection();
long includeLastModified = 0;
if (iuc instanceof JarURLConnection) {
includeLastModified = ((JarURLConnection) iuc).getJarEntry().getTime();
} else {
includeLastModified = iuc.getLastModified();
}
iuc.getInputStream().close();
if (includeLastModified > targetLastModified) {
return true;
}
} catch (Exception e) {
if (log.isDebugEnabled()) log.debug("Problem accessing resource. Treat as outdated.", e);
return true;
}
}
return false;
}