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https://issues.apache.org/jira/browse/FOP-2146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17263712#comment-17263712
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Christopher Watford commented on FOP-2146:
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When you use the PDFTranscoder, it is not possible to disable the font cache or
change the font cache file:
{code:java}
DefaultConfigurationBuilder cfgBuilder = new DefaultConfigurationBuilder();
Configuration cfg =
cfgBuilder.build(getClass().getResourceAsStream("fop-config.xml"));
PDFTranscoder transcoder = new PDFTranscoder();
transcoder.configure(cfg);
TranscoderInput input = new TranscoderInput(getSVGDocument());
ByteArrayOutputStream output = new ByteArrayOutputStream();
TranscoderOutput transOutput = new TranscoderOutput(output);
transcoder.transcode(input, transOutput);
{code}
This is because when you dive into the guts:
# PDFDocumentGraphics2DConfigurator gets created and configures itself using
the configuration passed to the transcoder.
# A new FontManager is created within PDFDocumentGraphics2DConfigurator, which
DOES NOT use the configuration passed to the transcoder.
# This FontManager is then used in DefaultFontConfigurator, and if there were
any system fonts, they are saved.
# The FontManager at this point is configured to use a relative directory
called ".fop" which ends up being local to a read-only file system.
This is in spite of either use-cache being false, or cache-file pointing to
another location.
The FontManager created within the PDFDocumentGraphics2DConfigurator needs to
get its cache location from the FOP configuration.
> Wrong FontCache-Directory used for not existing userHome in
> FontCache.getDefaultCacheFile() (Bug 47786 was not fixed correctly)
> -------------------------------------------------------------------------------------------------------------------------------
>
> Key: FOP-2146
> URL: https://issues.apache.org/jira/browse/FOP-2146
> Project: FOP
> Issue Type: Bug
> Components: font/unqualified
> Affects Versions: 1.1
> Environment: Operating System: All
> Platform: All
> Reporter: mg
>
> Method getDefaultCacheFile() returns an invalid file name if the user has no
> home directory set. In that case the name of the fop user directory
> (FOP_USER_DIR!) is returned and not the name of the cache file
> (DEFAULT_CACHE_FILENAME).
> Wrong Code:
> public static File getDefaultCacheFile(boolean forWriting) {
> File userHome = getUserHome();
> if (userHome != null) {
> File fopUserDir = new File(userHome, FOP_USER_DIR);
> if (forWriting) {
> boolean writable = fopUserDir.canWrite();
> if (!fopUserDir.exists()) {
> writable = fopUserDir.mkdir();
> }
> if (!writable) {
> userHome = getTempDirectory();
> fopUserDir = new File(userHome, FOP_USER_DIR);
> fopUserDir.mkdir();
> }
> }
> return new File(fopUserDir, DEFAULT_CACHE_FILENAME);
> }
> return new File(FOP_USER_DIR);
> }
> If getUserHome() does not return a directory the default name must be
> returned (and not the name of the directory):
> return new File(DEFAULT_CACHE_FILENAME);
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