public InputStream getThumbnailStream(WorkflowThumbnailParams params) throws Exception {
String widthName = Integer.toString(params.getWidth());
String heightName = Integer.toString(params.getHeight());
InputStream is =
getStreamFromCache(
params.getWorkflow(),
params.getStepId(),
widthName,
heightName,
params.showLabels(),
params.maintainAspect());
if (is == null) {
BufferedImage image = delegateImageManager.getThumbnailImage(params);
if (image != null) {
File cacheFile =
addImageToCache(
image,
params.getWorkflow(),
params.getStepId(),
widthName,
heightName,
params.showLabels(),
params.maintainAspect());
try {
is = new FileInputStream(cacheFile);
} catch (Exception e) {
log.error("Workflow Thumbnail File Missing!", e);
}
}
}
return is;
}
public BufferedImage getThumbnailImage(WorkflowThumbnailParams params) throws Exception {
String widthName = Integer.toString(params.getWidth());
String heightName = Integer.toString(params.getHeight());
BufferedImage image = null;
if (cacheHasValidImage(
params.getWorkflow(),
params.getStepId(),
widthName,
heightName,
params.showLabels(),
params.maintainAspect())) {
image =
ImageIO.read(
getCacheFile(
params.getWorkflow(),
params.getStepId(),
widthName,
heightName,
params.showLabels(),
params.maintainAspect()));
} else {
image = delegateImageManager.getThumbnailImage(params);
}
return image;
}