public Long getLastModified(String resource) {
long result = -1;
URLConnection uc = null;
try {
URL jspUrl = getResource(resource);
if (jspUrl == null) {
incrementRemoved();
return Long.valueOf(result);
}
uc = jspUrl.openConnection();
if (uc instanceof JarURLConnection) {
result = ((JarURLConnection) uc).getJarEntry().getTime();
} else {
result = uc.getLastModified();
}
} catch (IOException e) {
if (log.isDebugEnabled()) {
log.debug(Localizer.getMessage("jsp.error.lastModified", getJspFile()), e);
}
result = -1;
} finally {
if (uc != null) {
try {
uc.getInputStream().close();
} catch (IOException e) {
if (log.isDebugEnabled()) {
log.debug(Localizer.getMessage("jsp.error.lastModified", getJspFile()), e);
}
result = -1;
}
}
}
return Long.valueOf(result);
}
/**
* Method used by background thread to check the JSP dependencies registered with this class for
* JSP's.
*/
public void checkCompile() {
if (lastCheck < 0) {
// Checking was disabled
return;
}
long now = System.currentTimeMillis();
if (now > (lastCheck + (options.getCheckInterval() * 1000L))) {
lastCheck = now;
} else {
return;
}
Object[] wrappers = jsps.values().toArray();
for (int i = 0; i < wrappers.length; i++) {
JspServletWrapper jsw = (JspServletWrapper) wrappers[i];
JspCompilationContext ctxt = jsw.getJspEngineContext();
// JspServletWrapper also synchronizes on this when
// it detects it has to do a reload
synchronized (jsw) {
try {
ctxt.compile();
} catch (FileNotFoundException ex) {
ctxt.incrementRemoved();
} catch (Throwable t) {
jsw.getServletContext().log("Background compile failed", t);
}
}
}
}
/**
* 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;
}
/**
* 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;
}
