/**
* Constructs a GroovyPageMetaInfo instance which holds the script class, modified date and so on
*
* @param inputStream The InputStream to construct the GroovyPageMetaInfo instance from
* @param res The Spring Resource to construct the MetaInfo from
* @param pageName The name of the page (can be null, in which case method responsible for
* calculating appropriate alternative)
* @return The GroovyPageMetaInfo instance
*/
protected GroovyPageMetaInfo buildPageMetaInfo(
InputStream inputStream, Resource res, String pageName) {
String name = establishPageName(res, pageName);
long lastModified = establishLastModified(res);
GroovyPageParser parser;
String path = getPathForResource(res);
try {
parser = new GroovyPageParser(name, path, path, inputStream);
} catch (IOException e) {
throw new GroovyPagesException(
"I/O parsing Groovy page ["
+ (res != null ? res.getDescription() : name)
+ "]: "
+ e.getMessage(),
e);
}
InputStream in = parser.parse();
// Make a new metaInfo
GroovyPageMetaInfo metaInfo = createPageMetaInfo(parser, lastModified, in);
try {
metaInfo.setPageClass(compileGroovyPage(in, name, path, metaInfo));
metaInfo.setHtmlParts(parser.getHtmlPartsArray());
} catch (GroovyPagesException e) {
metaInfo.setCompilationException(e);
}
if (!name.startsWith(GENERATED_GSP_NAME_PREFIX)) {
pageCache.put(name, metaInfo);
}
return metaInfo;
}
/**
* Attempts to compile the given InputStream into a Groovy script using the given name
*
* @param in The InputStream to read the Groovy code from
* @param name The name of the class to use
* @param pageName The page name
* @param metaInfo
* @return The compiled java.lang.Class, which is an instance of groovy.lang.Script
*/
private Class<?> compileGroovyPage(
InputStream in, String name, String pageName, GroovyPageMetaInfo metaInfo) {
GroovyClassLoader groovyClassLoader = findOrInitGroovyClassLoader();
// Compile the script into an object
Class<?> scriptClass;
try {
scriptClass = groovyClassLoader.parseClass(DefaultGroovyMethods.getText(in), name);
} catch (CompilationFailedException e) {
LOG.error("Compilation error compiling GSP [" + name + "]:" + e.getMessage(), e);
int lineNumber = GrailsExceptionResolver.extractLineNumber(e);
final int[] lineMappings = metaInfo.getLineNumbers();
if (lineNumber > 0 && lineNumber < lineMappings.length) {
lineNumber = lineMappings[lineNumber - 1];
}
throw new GroovyPagesException(
"Could not parse script [" + name + "]: " + e.getMessage(), e, lineNumber, pageName);
} catch (IOException e) {
throw new GroovyPagesException(
"IO exception parsing script [" + name + "]: " + e.getMessage(), e);
}
return scriptClass;
}
/**
* Creates a GroovyPageMetaInfo instance from the given Parse object, and initialises it with the
* the specified last modifed date and InputStream
*
* @param parse The Parse object
* @param lastModified The last modified date
* @param in The InputStream instance
* @return A GroovyPageMetaInfo instance
*/
private GroovyPageMetaInfo createPageMetaInfo(
GroovyPageParser parse, long lastModified, InputStream in) {
GroovyPageMetaInfo pageMeta = new GroovyPageMetaInfo();
pageMeta.setJspTagLibraryResolver(jspTagLibraryResolver);
pageMeta.setTagLibraryLookup(tagLibraryLookup);
pageMeta.setContentType(parse.getContentType());
pageMeta.setLineNumbers(parse.getLineNumberMatrix());
pageMeta.setLastModified(lastModified);
pageMeta.setJspTags(parse.getJspTags());
pageMeta.setCodecName(parse.getDefaultCodecDirectiveValue());
pageMeta.initCodec();
// just return groovy and don't compile if asked
if (isReloadEnabled() || GrailsUtil.isDevelopmentEnv()) {
pageMeta.setGroovySource(in);
}
return pageMeta;
}
private GroovyPageTemplate createTemplateFromPrecompiled(String originalUri, String uri) {
if (precompiledGspMap != null) {
GroovyPageMetaInfo meta = precompiledCache.get(uri);
if (meta != null) {
return new GroovyPageTemplate(meta);
}
String gspClassName = precompiledGspMap.get(uri);
if (gspClassName != null) {
Class<GroovyPage> gspClass = null;
try {
gspClass =
(Class<GroovyPage>)
Class.forName(gspClassName, true, Thread.currentThread().getContextClassLoader());
} catch (ClassNotFoundException e) {
LOG.warn(
"Cannot load class " + gspClassName + ". Resuming on non-precompiled implementation.",
e);
}
if (gspClass != null) {
meta = new GroovyPageMetaInfo(gspClass);
meta.setJspTagLibraryResolver(jspTagLibraryResolver);
meta.setTagLibraryLookup(tagLibraryLookup);
if (LOG.isDebugEnabled()) {
LOG.debug(
"Adding GSP class GroovyPageMetaInfo in cache for uri "
+ uri
+ " classname is "
+ gspClassName);
}
precompiledCache.put(uri, meta);
precompiledCache.put(originalUri, meta);
return new GroovyPageTemplate(meta);
}
}
if (precompiledGspMap.size() > 0) {}
if (LOG.isDebugEnabled()) {
LOG.debug("No precompiled template found for uri '" + uri + "'");
}
}
return null;
}
/**
* Establishes whether a Groovy page is reloadable. A GSP is only reloadable in the development
* environment.
*
* @param resource The Resource to check.
* @param meta The current GroovyPageMetaInfo instance
* @return True if it is reloadable
*/
private boolean isGroovyPageReloadable(Resource resource, GroovyPageMetaInfo meta) {
return isReloadEnabled() && (establishLastModified(resource) > meta.getLastModified());
}
